Tag Archives: goose-neck barnacle

Smoke And Fog Through The Week

Posted on by

Weather:

  • Sky overcast, heavy fog and some smoke
  • Visibility 1 NM down to 100m
  • Wind 5-15 knots SW
  • Sea state: calm

Visitors/Boats:

  • A contractor came out to do a little work yesterday, and some supplies were brought over as well.
  • We have not had much other activity. Tour vessels are becoming less frequent, and the same for pleasure craft.

Observations: 

  • The fog and smoke cover has been extreme over the past four days or so – it is hard to discern the fog to smoke ratio. The fog horn has been sounding for the better part of those days. Probably an average of 16-18 hours per day and typically going through the night.
  • The sea lions are gradually taking over the shores of Race Rocks! Their numbers increase by the day – the areas around the ‘fuel shed’ and the crane are beginning to see a couple of curious creatures poking around. We’re planning on redesigning the fencing on the jetty for this season and for the rest of the island it looks to be high time for a parameter fence. We do need to keep the buildings protected and significant areas undisturbed, but it has been nice to see the sea lions lounge on the jetty.
  • There seems to be a bit of an increase in some birds. There have been shorebirds and others, perching all around the rock and often resting at night. If we need to move around outside at night we keep an eye out as they sleep in the grass and in the plants around the paths.
  • A census will come hopefully tomorrow – the visibility makes it into a game of opportunity.

Here are some pictures from around the rock over the past couple of days:

Gentle Winds and Plentiful Wildlife

Posted on by

Weather:

  • Visibility 15+ NM
  • Sky partly cloudy
  • Wind 5-10 knots N
  • Sea state: Calm

Visitors/Boats:

  • Yesterday Laura and Greg came at low tide to deliver fuel and for Laura to teach her online class.
  • Greg came this morning to deliver a load of fresh water which we pumped into our storage tank with the fire pump and hoses.
  • Today we saw a dive vessel in the reserve but no divers. They were fairly close to the wildlife but the sea lions did not seem particularly bothered.
  • One small pleasure craft hovered just outside of the reserve for the majority of the day. They were too far away to see what they were doing, but usually boats like this are fishing.

Ecological:

  • The small seal pup is still here, but she has become more adventurous over the past week. We have seen her napping on the east side of the island, and beside the decommissioned diesel tank on the west side.
  • The sea lion population continues to grow, and so does the smell! We will need to set up more fencing soon before they begin to take over the island completely.
  • The pair of crows that we have been seeing returned today and spent most of their day at Race Rocks.
  • We have continued to observe bald eagles in the reserve. We enjoy watching them swoop overhead and cause a stir amongst the seagulls.
  • One of the seals that we have been joined by over the past weeks was also spotted here in December (juvenile female V173). We are still waiting to hear from the researchers who tagged her to see if there is anything interesting to learn.
  • The elephant seals activity has been uneventful as they continue to moult. They spend their days napping and lounging on our “lawn” or wiggling down to the jetty to soak in the shallow water (and perhaps relieve the itchiness of all that peeling fur!).
  • At low tide yesterday we spotted many neat creatures in the exposed pool on the east side of Great Race Rock: urchins, anemones, crabs, fishes, chitons, barnacles, and tubeworms!

 

Groundhog Day

Posted on by

Wind: yesterday 0-52 knots from S to W, today 0-18 knots from W to NE
Sea State: yesterday rippled with waves up to 1 m in afternoon and evening, today rippled
Visibility: yesterday 5-10 NM, today 15 NM
Sky: yesterday rain then patches of sun, today clear
Temperature: yesterday 5-12 °C, today 3-5 °C
Atmospheric CO2: 414.49 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

This morning at sunrise, the elephant seals saw their shadows. As the lore goes for their fellow mammal the groundhog, that means six more weeks of winter. Hard to believe with the crocuses blooming and daffodils buds almost ready to burst. Although, there is snow in the forecast for tonight and tomorrow as the temperature drops to 0 °C.

There were no visitors to the island. Two eco tour boats were seen in the reserve this afternoon.

Here are the results for the weekly census, conducted in the afternoon of Sunday, February 2:
10 elephant seals (3 female adults, 4 male adults, 1 female pup, 1 male pup and 1 unknown gendered pup)
147 steller sea lions
288 california sea lions
104 harbour seals
10 bald eagles (5 adults, 5 juveniles)
1 raven
109 brandt’s cormorants
182 pelagic cormorants
49 double-crested cormorants
24 canada geese
931 gulls (most are thayer’s gulls)
18 black oystercatchers
1 whimbrel
1 surf scoter
8 harlequin ducks
16 black turnstones
1 snow bunting
1 fox sparrow

Windy Census Day

Posted on by

Weather

  • Visibility: 15+ miles
  • Wind: 15-20 knots West in the morning, 25-30 after noon.
  • Sky: Sunny with clouds.
  • Water: 1′ chop
  • Expect the wind to keep it up for a while.

Ecological

  • Conducted a census today.
  • I suspect that the high winds have kept away certain species of birds, making today’s list less impressive.
  1. Harbour Seals: 91
  2. Northern Sea Lions: 47
  3. California Sea Lions: 27
  4. Elephant Seals: 19 (15 on Great Race, 4 on Middle Rock)
  5. Seagulls: 314
  6. Pigeon Guillemots: 108
  7. Surfbirds: 39
  8. Canada Geese: 18
  9. Black Turnstones: 14
  10. Black Oystercatchers: 10
  11. Rock Sandpipers: 3
  12. Bald Eagles: 3 (2 adult, 1 immature)
  13. Savannah Sparrows: 2
  14. Harlequin Ducks: 2 (1 male, 1 female)
  15. Cormorant: 1 (one seen on Turbine Rock)

Maintenance

  • Intended to spray algicide on various building walls, but too windy to ensure accuracy. Perhaps tomorrow if the wind dies down.
  • Started investigating the paint stock.
  • Some goose work.

Boats

  • No boats in the reserve today.

Cruise Ship and Sea Lions

Het Nieuw Amsterdam

Het Nieuw Amsterdam

March 14 – West Wind and Waves

Posted on by

Overcast and rain in the morning, sunny in afternoon
Wind: 1-11 knots from the W and N in the morning, 22-46 knots from the W from the late morning onwards
Air Temperature: Low 9.3°C, High 11.3°C
Ocean Temperature: 9.2°C

A gale warning in the afternoon, with winds gusts up to 46 knots, remained in effect for the rest of the day. The gulls had a hard time sitting and claiming their nesting sites when the wind gusts reached 46 knots. Due to the winds, the afternoon was filled with indoor tasks like cleaning, organizing the basement and drinking tea. The winds diminished in the evening.

Hanne Christensen, one of the visiting Pearson students, took some photos around the island yesterday and today. They are included in the gallery below.

March 10 – Juncos and a Robin

Posted on by

Cloudy, with fog in the morning
Wind: 0 – 16 knots from the W then NE in the morning, switching to SE in the afternoon
Air Temperature: High 10°C, Low 7°C
Ocean Temperature: 8.9°C

This morning, the Pearson students here for Project Week helped stack firewood in the cupboards outside of the Engine Building.

Four oregon juncos and a robin were seen flying around the southern part of Great Race.

This afternoon, four students took part in rescue diving scenarios with Chris. Afterwards a few of them went snorkelling around the jetty to check out the sea stars, a sea slug and other species.

Chunk continues to hang out near the Marine Science Centre.

Three ecotour boats came into the ecological reserve to share the sights, sounds and smells of the marine mammals and birds with their customers.

Pollicipes polymerus – Nakwakto variety of goose-neck barnacle-The Race Rocks Taxonomy

Posted on by

Image by Garry Fletcher,September 7, 2011
This is the first image taken of this variety of gooseneck barnacle at Race Rocks. On the tidal energy generator which was removed in 2011. Two clumps of these barnacles were collected from a join in the housing materials. In Lamb and Hanby, Marine Life of the Pacific Northwest, they state the following:“—Nakwakto goose-neck barnacle, a large and colourful variation of the goose neck barnacle found inlNakwakto Rapids, Slingsby Channel, BC. The glorious red colour is actually the hemoglobin in the barnacle’s blood. The blood is obvious in subtidal specimens like these which do not have black pigment that which protects the sun-exposed populations inhabiting shallow or intertidal zones. Familiar to an ever-increasing number of recreational divers, the unique and isolated population must be preserved via a No-Take Marine Protected Area.”

Link to the regular taxonomy and image file for the more common  Pollicepes polymerus

Domain Eukarya
Kingdom Animalia
Phylum Arthropoda
Order Thoracia
Suborder Lepadomorpha
Family Scalpellidae
Genus Pollicepes
Species polymerus
Common Name: Goose neck Barnacle Nakwakto (variety)

 

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.

 September 2011- Ryan Murphy

Pollicipes polymerus: Goose-neck Barnacle- The Race Rocks taxonomy

Posted on by


This low tide view on the south- west corner of Great Race shows the close competition between the California mussels and the goosenecks.
LOCATION:
The gooseneck barnacle, is found in abundance in the intertidal at Race Rocks. Globally. it is found from the southern region of Alaska to Baja, California. It is attached to rocks at the high intertidal zone and all organisms in a particular area will be oriented towards the same direction. It normally occurs on wave-beaten rocks. These barnacles have undergone extensive harvesting on the shorelines of the North Pacific, in particular around urban areas. Typically our record of conservation has been poor and continued harvesting results in very little stock recruitment and consequently a diminishing stock of this species. People of Western European origin frequently have a desire to eat this species, as it tastes very much like crab.

These clumps of gooseneck barnacles line the surge channel, if you see the video on the surge channel page , you can understand how they are exposed to a food source of plankton by the surge action even when they are above the tidal level. 

 

DESCRIPTION:

It has a fleshy stalk which attaches it to rocks or floating objects. The long neck is about up to 10cm. compared to the shell which is 5 cm. long. It has a leathery appearance with small bumps. The body consists of the peduncle and capitulum. The peduncle is the attachment organ but also contains ovaries and some muscles. It is covered with tiny ossicles on short fleshy stalk. the capitulum consists of most of the animal, including all appendages except the first antennae, The capitulum is ventral.

Domain Eukarya
Kingdom Animalia
Phylum Arthropoda
Class Cirripedia
Order Thoracica
Family Scalpellidae
Genus Pollicipes
Species polymerus
Common Name:Gooseneck Barnacle
–
REPRODUCTION AND FEEDING:

The organism is a hermaphrodite but they rarely undergo self fertilizaton. Cross fertilization is more common. Fertiliztion is external and it occurs in the mantle cavity. Gooseneck barnacles are filter feeders. They feed on smaller crustaceans and plankton. They do this by projecting their feathery feet called cirri to trap organisms. The cirri also act as lungs for gaseous exchange. Their main predators are the glaucous winged gull and the sea stars.

HISTORY:

Their name, gooseneck barnacle arose from the middle ages where they were thought to be developing geese which dropped off to become adult geese. As such geese were considered as fish and could be eaten on days meat was considered a taboo. Check out the patterns on the neck of the Brant Goose.

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.     October 2002- Garry Fletcher