Acanthodoris hudsoni: Hudson’s Dorid– The Race Rocks Taxonomy


General Description:
    Aconthodoris hudsoni is a typical representative of the Dorid Nudibranchs, which are also often referred to as sea slugs. Nudibranchs are sea snails that lack a shell and can vary greatly in coloration and form. That is why they are known as one of the most beautiful marine animals.    Acanthodoris hudsoni can be easily identified by its transparent whitish body and the yellow stripe running at the edge of its mantle. Its body is covered with conical pipalae, which are also tipped yellow. As most nudibranchs, Aconthodoris hudsoni has two long tentacles (called rhinophores) which are used as sensory organs for searching for food or a partner.
PHOTOS BY RYAN J MURPHY – ECOGUARDIAN 2010

Distribution:

    Sea slugs occupy the benthic zone. They usually live in the lower intertidal zone and could be found up to 700m in depth.   

    The dorid nudibranchs (over 3000 species) are widely spread throughout the world. Aconthodoris hudsoni, however, could be found only on the Pacific coast of North America.

Size: 1.5 to 2 cm

Feeding:

    Dorid nudibranchs feed on a wide variety of organisms: anemones, corals, hydroids, sponges, etc. However, they are highly specialized in their feeding habits. Some nudibranchs can eat only one specific genus or even species! Presently, it is not known what is the exact diet of Acanthodoris hudsoni, but biologists believe that it should be similar to the one of the other members of the genus Acanthodoris – bryozoans.

Reproduction:

     Sea slugs are hermaphrodites. Usually, they lay their eggs nearby a food source. The incubation period lasts for about 50 days, but can range in accordance to the abiotic factors in the environment. Nudibranchs go through a larval stage and when conditions are favourable, they metamorphose into young adults. This helps them distribute to larger areas.

Biotic Associations:

     Although the dorid nudibranchs would be usually found on top of rocks, sometimes they live on other organisms, such as corals, seaweeds, and sponges, and exhibit parasitic relationships.

Go to: Student Research: Shade Preference in Sub-tidal populations of Dorid Nudibranchs

References:

Behrens, David. Pacific Coast Nudibranchs. Sea Challengers: Monterrey, 1991. p48.

The Sea Slug Forum

Other Members of the Phylum Mollusca at Race Rocks.

taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

, Dec. 2010.- Ryan Murphy

Pandalus stenolepsis: Race Rocks Taxonomy

Ryan Murphy took these pictures in October 2011 and followed up in getting the identifications sorted out between this shrimp and Pandalus danae . See his pictures on Flickr: When Ryan took this image on the right, , he happened to get the small red tentacled a animals in the left of the picture. These are a new phylum for our records, rhe Phoronids.

DomainEukarya
KingdomAnimalia
PhylumArthropoda
ClassMalacostraca
OrderDecapoda
FamilyPandalidae
GenusPandalus
Speciesstenolepsis
Common Name:Shrimp

Other Members of the Phylum Arthropoda at Race Rocks.
taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams. March 15 2010- Ryan Murphy

Reflections on the Role of Education and Outreach in the MPA Designation Process, 1998-2010.

This information page was prepared and distributed to members of the RRPAB by Garry Fletcher, Race Rocks Ecological Reserve Warden and Educational director for the website racerocks.com –April 12, 2010.
It was modified on June 2, 2010 after discussion with Kate Ladell, the Marine Planning & Protected Areas Specialist Oceans, Habitat and Enhancement Branch of Fisheries and Oceans Canada .
: From the Canada -British Columbia Discussion Paper of August 1998 entitled Marine Protected Areas, Strategy for Canada’s Pacific Coast, A Joint Initiative of the Governments of Canada and British Columbia , ( a draft discussion paper for an MPA strategy that was prepared in 1998 by both federal and provincial agencies, not just DFO.) Appendix A of the document identifies the “Principal Participating Agencies in the Development of the Marine Protected Areas Strategy” as: DFO, BC Land Use Coordination Office, Parks Canada, BC MOE, Lands and Parks, Environment Canada, BC Ministry of Fisheries
Ms.Ladell of DFO has recently (2010) pointed out that,”The goals in the vision statement were goals of the MPA Strategy, and are broad so that they encompass the mandates of several agencies and Ministries…. they never were the goals of Oceans Act MPAs. Again, there has been no shift. The goals of Oceans Act MPAs have never been tied to Community Outreach and Education – please refer the Oceans Act. ”
in Section 4 on Vision and Objectives for MPAs, one of the benefits of MPAs was found to be: ” encouraging expansion of our knowledge and understanding of marine systems;”

The 1998 Discussion paper went on in the objectives to specify two significant objectives that captured the essence of how important the process was for education and research.
“4.2 Objectives for Establishing Marine Protected Areas
5. To Provide Scientific Research Opportunities and Support the Sharing of Traditional Knowledge

Scientific knowledge of the marine environment lags significantly behind that for the terrestrial environment which can affect the ability of marine managers to identify the merits of protection or management options. MPAs provide increased opportunities for scientific research on topics such as species population dynamics, ecology and marine ecosystem structure and function, as well as provide opportunities for sharing traditional knowledge.

6. To Enhance Efforts for Increased Education and Awareness

Over the last few years, public understanding and awareness of marine environmental values and issues have been increasing. There is general recognition that proactive measures are necessary to protect and conserve marine areas to sustain their resources for present and future generations. However, there is still a significant need for public education to instill greater awareness of the role everyone can play in the conservation of marine environments. Many MPAs will afford unique opportunities for public education because of their accessibility and potential to clearly demonstrate marine ecological principles and values.”

In the 1999 paper by Louise Murgatroyd (sponsored by DFO) titled Managing Tourism and Recreational Activities in Canada’s Marine Protected Areas: the Pilot Project at Race Rocks, British Columbia acknowledgement is made of the role of MPAs and Education.
5.5 Education and Interpretation

The provision of opportunities for education is a central function of MPAs and is a desirable and highly effective strategy against negative impacts from tourism. Education programs also reduce the need for, and cost of, formal means of enforcement (Causey 1995). Commercial tourism activities at Race Rocks are, on the whole, oriented at providing an educational experience and this must remain their primary objective. Tour operators must be encouraged to include information specific to the natural history of Race Rocks and its ecosystem when taking clients there (Willison 1999, pers. comm.). Furthermore, information regarding its protected status as an ecological reserve and pilot MPA should be provided to generate recognition and support for such initiatives. There is a need for consistency in this respect and it would be appropriate for industry, in partnership with other agencies such as local universities and museums, to develop a minimum standard of information to be included in interpretation, to ensure that correct and relevant information is being provided.

Education and interpretation are particularly important for private recreational users who are considerably more difficult to target. Broader efforts aimed at educating the recreational boating public on general conduct and appropriate behaviour in coastal waters, including ERs and MPAs would seem to be a realistic approach. To this end, the distribution of the booklet Protecting BC’s Aquatic Environment: A Boater’s Guide, a joint publication by DFO, Environment Canada and BC’s Ministry of Environment, Lands and Parks should continue. The booklet covers a number of aspects of environmentally responsible boating, including respect for marine wildlife. The British Columbia Tidal Waters Sport Fishing Guide contains information on the location and regulations of MPAs, species conservation efforts and whale watching guidelines and is also an important contribution to awareness-raising……contd.

In 2001, The Oceans Directorate of Fisheries and Oceans Canada, Pacific Region published an information pamphlet titled
Xwayen (Race Rocks) Marine Protected Area. In that pamphlet educational use is recognized :
Under “Who can use a Marine Protected Area: “The type and level of use depends on why the area is being protected, and will be decided in consultation with local resource users. Levels of protection can vary from controlled use where resource harvesting is allowed to strict “no take”zones. Other uses may include education, research and tourism.”
In the Management Plan developed by the Race Rocks Advisory Board in 2002, the following objectives were set out which also included Education and Outreach:
1″.To contribute to the protection of marine biodiversity, representative ecosystems and special natural features.
2.To contribute to the conservation and protection of fishery resources and their habitats.
3. To contribute to the protection of cultural heritage resources and encourage understanding and appreciation .
4. To support recreation and tourism opportunities.
5.To provide scientific research opportunities and support sharing of traditional knowledge.
6. To enhance efforts for increased education and awareness. To develop partnerships for management and protection of the ecological reserve – marine protected area including monitoring and reporting activities.
7.To develop working relationships and educational programs with First Nations.”
In the 2005 booklet titled Canada’s Federal Marine Protected Areas Strategy published by the Communications Branch of Fisheries and Oceans Canada, Three core programs of the Marine Protected Areas Network are set out:
• Oceans Act Marine Protected Areas established to protect and conserve important fish and marine mammal habitats, endangered marine species, unique features and areas of high biological productivity or biodiversity.
• Marine Wildlife Areas established to protect and conserve habitat for a variety of wildlife including migratory birds and endangered species.

• National Marine Conservation Areas established to protect and conserve representative examples of Canada’s natural and cultural marine heritage and provide opportunities for public education and enjoyment.

On the 2006 DFO webpage (active until April 2010), the Vision and Objectives page carried the following 2 objectives of a list of 6:
“The MPA Vision:
Generations from now Canada will be one of the world’s coastal nations that have turned the tide on the decline of its marine environments. Canada and British Columbia will have put in place a comprehensive strategy for managing the Pacific coast to ensure a healthy marine environment and healthy economic future. A fundamental component of this strategy will be the creation of a system of marine protected areas on the Pacific coast of Canada by 2010. This system will provide for a healthy and productive marine environment while embracing recreational values and areas of rich cultural heritage.

Objectives for Establishing Marine Protected Areas:

* To contribute to the Protection of Marine Biodiversity, Representative Ecosystems and Special Natural Features
* To contribute to the Conservation and Protection of Fishery Resources and Their Habitats
* To contribute to the Protection of Cultural Heritage Resources and Encourage Understanding and Appreciation
* To provide Opportunities for Recreation and Tourism
* To provide Scientific Research Opportunities and Support the Sharing of Traditional Knowledge
* To Enhance Efforts for Increased Education and Awareness”

In this 2007 version of the Oceans and Fish Habitat section on the DFO website at http://www.dfo-mpo.gc.ca/oceans-habitat/oceans/ri-rs/mpaframework-cadrezpm/page04_e.asp the need for effective partnership is emphasized.
“The concept of partnership is vital to the MPA Program its success depends on how well various interests are able to work together. Key program areas dependent on partnership include the gathering of information, the development of public awareness of environmental issues, the conducting of research, and the enforcement of regulations.”
Coastal Communities and Non-Government Conservation Organizations

The MPA program provides an opportunity for communities, as well as local, regional and national conservation groups, to be involved in conservation activities in the marine environment. In coastal MPA management, local organizations and communities will have the opportunity to play a prominent role, ranging from nomination and comanagement of sites to consultation activities and public awareness programs. Organizations nominating an MPA could become a ‘sponsor’ for the site. A sponsor is an organization prepared to make a long-term partnership arrangement for managing the MPA.”

Under information Sources:

establishing a monitoring component as part of some MPAs
using MPAs as natural laboratories to conduct environmental research.
Research and monitoring

Many environmental processes within marine ecosystems are poorly understood. Scientific research and monitoring may be conducted within MPAs, where appropriate, to understand marine ecosystems better and to provide valuable data on environmental changes.
Public awareness

Compliance with MPA regulations and management plans depends on the awareness and cooperation of the public. Interpretation and education programs may be necessary to explain the purposes of MPAs, and to provide information on appropriate activities within an area.”

In the 2009 version of the DFO website at:http://www.pac.dfo-mpo.gc.ca/oceans/mpa/vision_e.htm no mention is made of the outreach goals of the MPAs but education is still included in the goals of the National Marine Conservation Area. (However Race Rocks is not part of one of those)
“Purpose and Goals ( of MPAs)

Fisheries and Oceans Canada (DFO) designates marine protected areas under the Oceans Act in order to protect and conserve:

* commercial and non-commercial fishery resources and their habitats;
* endangered marine species and their habitats;
* unique habitats;
* marine areas of high biodiversity or biological productivity; and
* any other marine resource or habitat necessary to fulfill the Ministers mandate.

Within Canada, two other federal agencies — Environment Canada (Canadian Wildlife Service) and Parks Canada Agency — are working in collaboration with DFO to establish and manage federal marine protected areas
.Environment Canada

* Marine Wildlife Areas — established to protect and conserve habitat for a variety of wildlife, including migratory birds and endangered species.

Parks Canada

* National Marine Conservation Areas — established to protect and conserve representative examples of Canada’s natural and cultural marine heritage, and to provide opportunities for public education and enjoyment. ”

So it may be apparent now that the government Policy has evolved over the years on why Marine Protected areas are being established, and the public outreach element has been relegated to a task of the National Marine Conservation Areas. Since Race Rocks has never been part of a National Marine Conservation Area Proposal, it calls into question the appropriateness of an MPA under the Oceans act at the Race Rocks Ecological Reserve. Perhaps it should be considered a Marine Conservation Area where education is a priority. It appears that the existing mandate for Provincial Ecological Reserves of “promotion of research and education” will have to be relied upon for the Race Rocks MPA. Many of the stakeholders who have contributed time and energy to the MPA Advisory Process over the past years have done so with the understanding of the importance of “Outreach and Education” as a significant part of the MPA objectives. Clarification provided by DFO indicates that Education and Outreach is not part of their mandate but will still be part of the MPA through the existing Ecological reserve. Indeed I guess we were mislead as is indicated below.
Ms. Ladell of DFO has emphasized: ” There hasn’t been a change in policy regarding education and outreach in the MPA strategy. It is important to clarify that the strategy is not a DFO strategy but a federal-provincial strategy for a network of MPAs. The objectives that are included in that strategy (which, by the way, was released as a discussion paper in 1998 and never finalized), are therefore objectives for a network of federal-provincial MPAs, and are inclusive of the mandates of all involved agencies and ministries. The objective you note with respect to education and outreach is tied to the mandates of BC Parks and Parks Canada, and is one that DFO supports through a network approach, but not one that has ever been tied to our mandate per the Oceans Act. Therefore, the way the old website was written was indeed misleading, as it made it sound like the objectives were all DFO objectives for MPAs, when in fact they are objectives for the MPA network that are inclusive of several agencies’ mandates. ”

“HOWEVER, these are critical components of the Management Plan because they can support meeting the conservation objectives, and can therefore be included in the Management Plan. The important distinction here is between the actual conservation objective and implementation of the conservation objective through the management of the MPA (as outlined in a Management Plan).
This was taken down because it was misleading…… The objectives included in the 1998 Canada-BC discussion paper for a MPA Network Strategy are objectives for a network of federal-provincial MPAs, and are inclusive of the mandates of all involved agencies and ministries. The objectives specific to education and outreach are tied to the mandates of BC Parks and Parks Canada, and are objectives that DFO supports through a network approach, but not objectives that have ever been tied to our mandate per the Oceans Act. Therefore, the way the old website was written was misleading, as it made it sound like the objectives were all DFO objectives for MPAs, when in fact they are objectives for the MPA network that are inclusive of several agencies’ mandates. The old website was taken down because of the confusion it was causing and because it has finally been updated.
……..education is part of Parks Canada’s mandate around the establishment of National Marine Conservation Areas. There is no mention of outreach goals in the 2009 version of the DFO website, because, as stated above, outreach is not part of the mandate for conservation objectives in Oceans Act MPAs.
This is bolded on the website, but it is important to note that this is for NMCAs, not Oceans Act MPAs. As you correctly note above, the purpose of Oceans Act MPAs is very specific to the bullets (highlighted in large brown bold above).
………
Government policy has not changed on why Oceans Act MPAs are being established. The public outreach element has never been a part of the language around Oceans Act MPA designation or purpose from a regulatory standpoint.

HOWEVER, as stated above and in several recent meetings, DFO recognizes the important role of education and outreach and agrees that they should be a component of the management plan for Race Rocks MPA.”
(e-mail from Kate Ladell..June 2 2010 DFO)

Saxidomus giganticus: butter clam- The Race Rocks Taxonomy .

Saxidomus gigantea by Ryan Murphy, April, 2010
This is a common intertidal clam, usually however not found in an ecosystem such as Race Rocks, but rather on sandy or mud beaches. Find the other invertebrates in the image also . Chitons, a top snail, and the tentacles of a sea cucumber.

 
Domain Eukarya
Kingdom Animalia
Phylum Mollusca
Class Bivalvia
Subclass Heterodonta
Order Veneroida
Family Veneridae
Genus Saxidomus
Species gigantea (Deshayes,1839)
Common Name: Buttter Clam

taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams. March 15 2010- Garry Fletcher

Options on Alternate Configurations of Buffer zones

This file presents several possible configurations of buffer zones for the proposed MPA. It is important to recognize that this is only a proposal from one participant in how boundaries may be modified in the future as new research becomes available:
G. Fletcher, November 20, 2009,

A buffer zone for the MPA would solve several problems.
  • It could help eliminate the uncertainty over the actual reserve boundary, making it possible to monitor activities and report infractions more easily.
  • A buffer zone could ensure that such activities as ocean dumping, bilge discharge or ocean mining would not leave Race Rocks subject to possible future problems.
  • A buffer zone for commercial harvesting in place, would allow food resources of the species of the ecological reserve to be less compromised.
  • By requiring research permits for this area, regulation of all kinds of research can be better directed.
Below are presented a number of possible alternatives for defining a buffer zone. Units could be calculated in nautical miles also. Advantage of a straight side is that it allows accurate navigational points. Disadvantage -distance varies from tower.
#1: 3km square buffer around reserve #2: 4km parallel to reserve #3: 3km circle from reserve
bufferzone1 bufferzone2a bufferzone3-1

Several references mention the advantage of a buffer zone with such statements as “The buffer zones would reduce the likelihood of accidental incursions and would simplify enforcement activities,.”

In addition there will be no overflights by aircraft except where required by emergency operations or by Coast Guard at times acceptable to not interfere with breeding seasons. Cruise ships may not transit inside this 3 Km zone.

History of the Boundary Location for Race Rocks MPA and links to references

This proposal outlines the history of the boundary designation for the Race Rocks Ecological Reserve and the proposed boundaries offering protection in subsequent years.

There are also links to other files with proposals for establishment of a buffer zone and future boundary modifications for the proposed MPA.

rrecoreschart
1.1980: The existing ecological reserve boundaries were established to a depth of 20 fathoms or 36.6 meters. This level was chosen because it was a main contour on the existing marine charts of the day and because it would protect the seabed from overharvesting by divers.
2 1990: Under petitioning from BC parks and the ecological reserve warden, DFO, recognizing the significance of protecting more of the complete ecosystem at Race Rocks established a closure of all the reserve to commercial fisheries and a closure to recreational fishing of bottom fish. Fishing was allowed for transitory species such as salmon and halibut only. This designation proved to be difficult to enforce due to the distinction of types of fishing.
boundarydraft
3. 2000: In January, the MPA Advisory Board proposed boundaries for the reserve which would have straight sides, easily identifiable with coordinates.
This proposal was rejected by the sports fisheries advisory organization.
append5mapa
4. 2000: At a meeting of the sports fishing organisation and the Race Rocks Advisory Board members, the MPA advisory process agreed to a complete closure on fisheries within the existing ecological reserve boundary. This was a counterproposal to the new MPA boundaries being proposed, and the Advisory Board accepted that condition. It became part of the Proposal to Designate (Race Rocks) Marine Protected Area : 2000,
coord
This and the chart above were used to designate coordinates of the area in the first MPA proposal.
rockfishconserve
5. 2004: The areas in this map were proposed as a Rockfish Protection area by DFO.
rockfishclose
6. 2004: The actual rockfish protection area established was reduced from the above when it was created by DFO. It is now based on the 40 meter depth. All fishing within that zone was prohibited at that time.
rrmpasept09version1
7. 2009: At the September 25th, 2009 meeting of the Race Rocks Advisory Board, DFO representatives proposed the modification of the MPA boundaries to correspond to the lines indicated .
bathyunderlay
8. The chart shown here was produced as a request to overlay the projected boundaries on the multibeam sonar map.
racerocksplan
9. These 3 multibeam sonar images were produced after the first round of MPA advisory meetings, based on research started in 1999. This was the first time that such a detailed profile of the bottom substrate was available. In this and the image below, the colored area represents the topography down to 150 meters.
3d1
10. The multibeam sonar image modelled from a southerly viewpoint
race_rocks_oblique 11. With this level of imaging now available, it becomes obvious that the existing ecological reserve boundaries do not adequately reflect the geology and geography of the sea bottom and therefore probably do not adequately protect the complete ecosystem of the reef which surfaces as the Race Rocks archipelago. The files linked below provide suggestions for how we may go about dealing with this factor.
 bufferzone2a Link to proposals options on alternate configurations of Buffer zones
 bathyunderlay11 Link to proposal options on alternate MPA reserve boundaries
This proposal has been submitted by Garry Fletcher, the educational director of racerocks.com, a former biology teacher at Lester Pearson College and the Race Rocks Ecological Reserve warden since the beginning of the reserve in 1980.
Link to this MPA benefits file: This reference provides many examples of the research throughout the world on MPA benefits to fisheries enhancement, and biodiversity )
See the other maps and aerial photos of the area on racerocks.com

Phalacrocorax pelagicus: Review of Research on Nesting and Populations

rmpelagic1We have seen a marked decline in nesting of one of the four species of seabirds which has nested traditionally at Race Rocks, Pelagic Cormorants (Phalacrocorax pelagicus). By 2007, the nesting population had been reduced to one or two nests, and from 2008 to the last season (2009 ) there were no nests at all. This population crash has been common across the Gulf Islands., and the lower end of Vancouver Island and Strait of Juan de Fuca. According to the Canadian Wildlife Service, the population of this species is estimated to be at 9000 individuals, and the pelagicus subspecies is red-listed by BC – other subspecies are stable.

In this file, I have summarized the results of several papers on research on Cormorant populations in the southern Gulf Islands and Georgia Strait. Vermeer and Rankin, 1984, did their research when the populations were on the incline, however since the 1900s, this trend has not persisted as has been reflected in the paper by Chatwin et al. The summary of their paper and the possible reasons for decline are listed near the end of this review.

The British Columbia Coastal Waterbird Survey by Badzinski et al, 2005 indicated a possible upturn in the population trend in BC.

See images of Pelagic Cormorants on Ryan Murphy’s Flickr site

The Christmas bird count records from Race Rocks reflect some of the low population numbers at that time of year, but do show an increase in the last two years, so we hope this may signify a turn in the welfare of this species. It will be interesting to track whether or not this species returns to nesting.

Population Trends in Nesting Double-Crested and Pelagic Cormorants in Canada

  • Author(s): Kees Vermeer and Leo Rankin Source: The Murrelet, Vol. 65, No. 1 (Spring, 1984), pp. 1-9 Published by: Society for Northwestern Vertebrate Biology Stable URL: http://www.jstor.org/stable/3534203 (partial listing only)
  • ABSTRACT- Breeding populations of Double-crested (Phalacrocorax auritus) and Pelagic Cormorants (P. pelagicus) were surveyed in the Strait of Georgia, British Colum-bia, in 1983. Double-crested Cormorant numbers have increased 2.4-fold and Pelagic Cormorant numbers 1.1-fold since 1975. Double-crested Cormorant populations are presently not only increasing in British Columbia but all across Canada and in the northeastern United States. These increases are thought to be the result of decreased disturbance and persecution by man.
  • The following table is presented in partial form only:
Double-crested and Pelagic Cormorant Inventory in the Strait of Georgia in 2000

  • http://www.env.gov.bc.ca/wildlife/wsi/reports/4382_WSI_4382_RPT.PDF (see complete report)
    Authors:
    Trudy A. Chatwin, Monica H. Mather, Tanya Giesbrecht May 2001
    Abstract Since the early 1990’s Double-crested and Pelagic Cormorant have shown alarming declines in nesting populations in the Strait of Georgia. This study was initiated in 2000 to provide a complete count of nesting colonies in the Strait and compare population estimate from counts completed in various years since the mid 1950’s. A complete survey of all colonies was done in 1987. Before that, counts were done in many colonies, though not annually. We surveyed 34 Pelagic Cormorant and 17 Double-crested Cormorant historic and current colonies during the 2000 breeding season. Where possible we examined nest population trends at colonies with multiple years of data. Our analyses showed that overall counts of Pelagic Cormorants were down by half and Double-crested Cormorants had declined by two-thirds since 1987. Pelagic Cormorants showed a significant decline in total nests between 1959 and 2000; although during that period, an increase in the population at Mitlenatch Island was noted. At Double-crested Cormorant colonies, two significant increasing trends were noted. Since 1983 the population at Shoal Islands has slowly increased from zero to 104 nests in 2000. Likewise the population at Mitlenatch has also increased from zero to 70 nests. However these increases do not offset the very dramatic declines in overall population size. The most profound decreases were seen at Mandarte and Great Chain Islands where most of the Double-crested Cormorants were nesting in the late 1980’s. At Mandarte Island, 1100 nests were observed in 1983, while only to 215 were counted in 2000. We suggest that the causes of declines are possibly related to a combination of Bald Eagle disturbance, change in prey availability and human disturbance. Recommendations for management and conservation are discussed.
  • The following table is presented in partial form only:

The authors express their concern for the decline in recent years with the following summation:

  • “Based on nest counts, the nesting populations of Pelagic and Double-crested Cormorants in the Strait of Georgia have shown alarming declines in the last few years. Concern is especially warranted when one compares the complete counts that were made in 1987 and 2000. The number of nests observed has decreased by 54% for Pelagic and 70% for Double-crested Cormorants. “
The reasons for the decline were summarized in the paper as follows:

  • “The populations of both cormorant species have fluctuated considerably over the 40 years of surveys. This could be due to changes in prey availability in the Strait. Cormorants feed on Pacific Herring, Gunnells, Shiner Perch and Salmon. It has been suggested that herring schools have moved north in the Strait of Georgia (Jane Watson, Pers. Comm.), which could account for the increase in both species of cormorants at Mitlenatch. However, this does not account for the loss of the Hornby Island Colony as there is a major herring spawn in that area. As well, it is difficult to explain the increase in the Shoal Islands Double-crested Cormorant colony, by shifts in herring populations.
    Other concerns for nesting cormorants are predation by Bald Eagles (Haliaeetus leucocephalus) and disturbance from boat traffic. Eagle populations have increased on the east side of Vancouver Island (Karen Morrison, Pers. Comm.). Giesbrecht (2001) showed that Eagles were the main source of disturbance to nesting Double-crested Cormorant ’s in the Strait. She observed eagles flushing birds from their nests as well as direct predation on adults/juveniles. Recreational boating and kayaking have also increased in the Strait of Georgia. Although Giesbrecht (2001) did not observe flushing by boaters in her study, anecdotal information (Moul 2001) indicates that human disturbance either by landing at a colony or flushing birds by approaching too closely exposes chicks and eggs to predation by Northwestern Crows (Corvus caurinus), Glaucous-winged Gulls (Larus glaucescens) and Bald Eagles. “
British Columbia Coastal Waterbird Survey An Evaluation of Survey Power and Species Trends after Five Years of Monitoring March 2005http://www.bsc-eoc.org/download/BCCWS%205-YR%20Report.pdf

Authors: Shannon S. Badzinski 1, Richard J. Cannings 2, Tasha Smith 2, & Jason Komaromi 3

  • Data for two of three species of cormorants show increasing trends (Double-crested
    Cormorant, Pelagic Cormorant). Both these species have shown significant declines in numbers
    at breeding colonies on the British Columbia coast between 1980 and 2000, so the results from
    this survey may indicate a stabilizing trend but further monitoring is clearly needed. Brandt’s
    Cormorants, which occur primarily as a non breeding species, show no clear population trend
    over the past 5 years.
Also from the website of the Canadain WildlifeService, Information is presented on the decline of seabirds along the Pacific Coast of Canada. So we will continue to update our population observations of this species .Garry Fletcher, February, 2010

Elephant Seal Pup Born on Great Race Rocks February 7, 2010

rm070210pup

0758 hrs February 7, 2010: Today a new elephant seal pup was born on Great Race Rock . Follow the story below as we track what happens to this new pup. Photos by Ryan Murphy

 

Also see the excellent photos and video by  Raisa Mirza of the pup in 2010

Feb. 7, 2001: “The newest addition at Race Rocks: Sometime last night the second elephant seal to be born on Great Race Island arrived just a couple metres from the Science Centre. Faculty member Garth Irwin who was staying there, was the first to spot it this morning.

‘Elephant Seal’, 7, ‘I received a phone call this morning from the Chemistry teacher at Pearson College who was here overnight. He and his mother had heard “Bertha ” in the night and woke to see a new elephant seal pup and a group of eagles tearing at the afterbirth. Both Camera 1 and 3 are now located in the S window of the Science Centre, right above the action. The pup appears to be a male, and this time is the offspring of our other resident male “Misery” not “Slash”.’, ‘Ryan’, ’13:13:04 ,

Elephant seal pup at Race Rocks

This pup appears to be a boy; the mother is Bertha (Ninene’s mother) and father is perhaps Misery (the younger of our two resident males). This would be Misery’s first offspring.

Elephant seal pup at Race Rocks

“In this picture you can see Slash and his harem in the background. Slash (our oldest resident male) is hauled out on Middle Rocks with 3 females. There have been at least two births out there this year, but the high tides and storm surges washed away the first and most likely the second as well.  .

pb elephant seal pup

A minute after Ryan sent in his report of a new pup, at 7:59 AM, Pam from England reported it on Camera 5. She had taken the photo just at dawn at 7:43..


Pam went on to say “Saw the eagle eating near Bertha and Misery ..guessed it was a placenta…..new pup seen when it became light…lying by Bertha’s head.”Pam goes on to say “I think the pup had only just been born. It certainly wasn’t there last night when I was watching Bertha. At that time she looked uncomfortable and kept shifting about.   Misery incidentally has hardly lifted a flipper during all this excitement.” PB.

Bertha and elephant seal pup
Bertha and elephant seal pup

February 8, Bertha and the pup are doing well. Photo by Ryan Murphy. Mother and pup sleep on the lawn south of the science centre. Photo by Ryan Murphy Photos from camera 1 by Pam Birley ..see next few  lines: Misery mating with Bertha, photos by Pam Birley from Camera1

On Feb.13, Ryan reported in the Daily Log: ” Misery was observed mating with Bertha today around 1500hrs. Much less of a production than last year and the baby is keeping out of harm’s way.”

On camera 1 ( above two images) : Early morning Feb. 17 Pam Birley reports: “The family seem to have settled down very well and Bertha is allowing Misery to mate with her quite often. Misery seems very contented therefore right now and does not seem to be harming the pup in any way. The pup just keeps out of the way when they are mating and then goes back to feeding afterwards.

However the optimism was only for a few days.

rmfeb10pup

Ollie when life was good!

Elephant seal pup nursing

For the first two weeks the pup had done well, nursing almost constantly and gaining weight in preparation for weaning at 5 or 6 weeks.. and then. tragedy strikes..

rmfeb15scar By February 17.Ryan sent this image: “The pup has 20 or so long scratches across its back this morning.  I heard a lot of noise last night and was able to see Misery go after the pup numerous times. It seems that this bad behaviour only happens at night, and the pup is quite chubby and active compared to poor Ninene last year.  Still another 6 weeks to go, and who knows what Misery will do once Bertha leaves. I had noticed cuts on the pup’s chin a couple days ago, but its perfect baby coat is now marred. Ryan reported in the daily log of February 17:” Last night was a rough night for our newest pup as Misery was trying to mate with it. Tooth marks on the pups chin were evident a couple days ago, but now its baby coat is marred by 20cm scratches from Misery’s sexual aggression.”

rmfeb10misery
No doubt the accused and the guilty one.

In this second week Ollie too had become the object of aggression by Misery. Eventually, after three weeks, Ollie was dead and the bite marks on the back and the loud cries heard at night suggested that Misery was to blame.

miseryandpup
Assistant guardian Murray took this photo from the window of the science centre from above. It shows Misery and the dead pup.
And then in what seemed to be a repeat of last year’s behaviour patterns. In the March 2nd daily log Ryan notes that Slash was on Great Race Island, mating with Bertha and Misery had had a fight with the old male. The following pictures show the end result with the injuries sustained by Misery.(Perhaps to anthropomorphize…you might say justice is served?) 

In 2011, another pup was born to Bertha. Given the past record with Misery, the outcome was inevitable. The pup lived only a week or so and then was crushed by Misery 

The Elephant Seal taxonomy and Index.

Elephant Seal pup on Middle Rocks, 2010

Elephant Seal pup on Middle Rocks, January 21, 2010.

Pup on Middle Rocks, with mother, placenta and bald eagle. Photo by Ryan Murphy

January 21, 2010: Today a new elephant seal pup was born on Middle Island Rock at Race Rocks. Follow the story below as we track what happens to this new pup.
elephant seal birth at Race Rocks elephant seal birth at Race Rocks elephant seal birth at Race Rocks
Early in the morning, Pam Birley, viewing on the remote camera 5 from England spotted a newly arrived pup on Middle Island Rock at Race Rocks. She sent the image above and the following message: “Looks like Slash is a Dad again !!!! He is there on middle rock with two females and….a pup.  I waited until I saw it move to be sure before I told you.   You can see it just behind Slash in front of the female.”
Ryan was able to get the following pictures with his telephoto lens from Great Race Rock Island. Above is the complete image from the title picture. Two females and Slash the old male who has been at Race Rocks for several years now are on the island. Ryan reports that Slash had been on the main island the last few weeks (see the daily log reports) He has been trumpeting and then yesterday left and moved out to Middle Rock
elephant seal birth at Race Rocks elephant seal birth at Race Rocks elephant seal birth at Race Rocks
“Yesterday we got Camera 3 back broadcasting and at dark yesterday Slash was out there by himself.  Amazing that these two females showed up and one of them gave birth in such a short time period.” “For reference,Ninene was born the morning of February 1 last year.  The new little one appears to be doing well, though a good storm it could be washed away like the other pups born there last year.  This if the fourth birth observed here at Race Rocks.  Looks like a boy to me.” Jan 21, 2010 Check out other pictures Ryan has taken of Elephant seals on his Flickr Set.
elephant seal pup elephant seal pup
Jan. 22/10 1600 hrs the pup was spotted in the late afternoon. Closeup of next picture Jan 22. 1600 hrs.This was possibly the last this pup was sighted as there were large swells that night at high tide. Jan 23 . 1530 hrs. From remote camera 5, Garry took this composite set of a pup with the group.
February 1, 2010 0900 hrs. Another pup was sighted by Ryan over the top edge of the island, out of view of camera 5 .Possibly Scarlet’s

See the pups born on Middle Rocks in 2009

See the Elephant seal taxonomy and Gallery Index.