–with the tail of the fish in it’s talons and the fish head bouncing off the water surface

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Tuesday, April 30, 2002
Good Evening
TEMPERATURE: Max. 16.5 ºC »» Min. 5.7 ºC »» Reset 10.3 ºC »» Hi – Low and Totals For April »» Hi 16.5 ºC day 30 »» Low 3.1 ºC day 08 »» Total Rain 61.7 mm »» No snow
MARINE LIFE: 3 bald eagles( 1 juvenile ) With the very low tide this morning it was a seafood buffet for the birds and otters.Watched two determined gulls try to drag a large fish carcass that looked like a ling cod, out of water on to the rocks.They worked at this for over 20 minutes to no avail. Suddenly out of the fog the young eagle landed 2-3 metres away from the gulls which moved out of the way. The big bird had little trouble getting the fish carcass up on the rocks where it had a better hold then spent about 15 minutes feeding, all the while the gulls were getting more brazen, moving closer to maybe take back the fish.Not about to share, the eagle took off towards the southeast rocks with the tail of the fish in it’s talons and the fish head bouncing off the water surface several times before it was completely airborne. When the eagle had it’s fill the gulls and crows moved in to scrounge what they could.
HUMAN INTERACTION: 2 Ecotour boats and 3 Pleasure craft through the reserve today.
posted by Carol or Mike S at 6:18 PM
Good Morning
WEATHER: Sky Partly Obscured »» Vis. 2 – 4 Miles Fog »» Wind West 11 Knots »» Sea Rippled
posted by Carol or Mike S at 6:25 AM

Ectopleura marina : The Race Rocks Taxonomy

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ah30810ectopleura

This close-up of an Ectopleura marina was photographed by Adam Harding at West Race Rocks around 60-70ft– 23/08/10

 

The three pictures above of Ectopleura were taken by Ryan Murphy in September 2010.

Physical Description: The Ectopleura marina are in polyp form. Polyps are cylindrical, with one end attached and the other free with tentacles and a mouth for feeding. The polyp stems are usually 2 – 5 cm long, with 18 tentacles in two whorls around the mouth, and 22 – 26 tentacles away from the mouth. Unlike their close relative, Ectopleura marina are solitary, or in groups of well-spaced individuals. Feeding polyps are pink, hence their common name pink-mouth hydroid. Global Distribution: The Ectopleura marina is found on the western coast of North America. Habitat: Ectopleura marina have been found on rocks in low intertidal and subtidal zones where there is fast flowing current. They are fairly common on exposed or semi-protected rocky shores, and are also found on floats.
Feeding: When starved for one or two days, polyps will eat active copepods, whereas when well-fed, polyps do not feed or respond to active prey. The polyps catch and stun their prey in their whorl of tentacles. They eat small crustaceans, larvae, chaetognaths, and annelid worms. When developing, polyps feed on eggs of various other invertebrates, plankton, and fish larvae.

Predators: No information on predators has been found, however the tentacles of hydroids contain poisons (nematocysts) that are a good defense against predators.Reproduction: Each colony of hydroids is usually of a single sex, although some hermaphrodites have been found. Medusa buds are produced in clusters which are attached between the two whorls of tentacles on the polyp. These medusoids develop 3 – 5 and do not come free, but rather stay small and attached until gametes develop, and usually die soon after. Sperm is shed into the water, but eggs stay in the medosoids and are not released until they have developed into larvae, which resemble the feeding polyps.

Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Order Hydroida
Family Tubulariidae
Genus Ectopleura
Species marina
Common Name: pink mouth hydroid

see this link for other hydroids:  https://www.racerocks.ca/tag/hydroid/

Interesting Fact: Ectopleura marina was formerly known as Tubularia marina. It also belongs to one of the most primitive and most diverse groups of multicellular organisms. References: “Hydrozoa.” Wikipedia. Wikipedia Encyclopedia. 12 Nov. 2005 Kozloff, Eugene N. Marine Invertebrates of the Pacific Northewest. Seattle: University of Washington P, 1996. Morris, R H., D P. Abbott, and E C. Haderlie. Intertidal Invertebrates of California. California: Stanford UP, 1980. “Phylum Cnidaria.” BC Marine Life Cnidaria. 13 Nov. 2005 <http://www.elasmodiver.com/BCMarinelife/BCML%20cnidaria.htm>. Strathmann, Megumi F. Reproduction and Development of Marine Invertebrates of North Pacific Coast. Seattle: Washington UP, 1987.
This file is provided as part of a collaborative effort by the students, volunteers,faculty and staff of Lester B. Pearson College–Grace Ho, 2005

Eudendrium sp. : Race Rocks Taxonomy — Photomicrography of Dr. Anita Brinckmann-Voss

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Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Order Anthoathecatae
Family Eudendriidae
Genus Eudendrium
Species sp.
Common Name:

This file is provided as part of a collaborative effort by Lester B. Pearson College and local scientists. Copyrighted 1999-All Images on this page are the property of:Dr. Anita Brinckmann- Voss..They can not be used or modified without her written permission. See this link for other hydroids:  https://www.racerocks.ca/tag/hydroid/

Symplectoscyphus turgidus : Race Rocks Taxonomy Photomicrography of Dr. Anita Brinckmann-Voss

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Symplectoscyphus turgidus (Trask, 1851), (Hydrozoa, Leptothecatae, Sertulariidae. d: colony; e: single hydranth enlarged without medusa buds. A common subtidal species, occasionally intertidal species. Note rectangular diatoms attached to the thecae of the colony (upper right hand corner of each picture)

Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Class Leptothecatae
Family Setulariidae
Genus Symplectoscyphus
Species turgidus (Trask, 1851),

This file is provided as part of a collaborative effort by Lester B. Pearson College and local scientists. Copyrighted 1999–All Images on this page are the property of: Dr. Anita Brinckmann-Voss.. They can not be used or modified without her written permission.

Sertularia sp. :Race Rocks Taxonomy: Photomicrography of Dr. Anita Brinckmann-Voss

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Stem up to 20 cm long, with the colony having the appearance of a thin bottlebrush. It is found in the same location as Tubularia regalis, the floor of the cave at Swordfish island – near Race Rocks.

 

Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Order Leptothecata (=Leptomedusae)
Family Sertulariidae
Genus Sertularia
Species sp.
Common Name:

This file is provided as part of a collaborative effort by Lester B. Pearson College and local scientists. Copyrighted 1999-All Images on this page are the property of:Dr. Anita Brinckmann- Voss..They can not be used or modified without her written permission.

see this link for other hydroids:  https://www.racerocks.ca/tag/hydroid/

Aglaophenia latirostris: Photomicrography of Dr. Anita Brinckmann-Voss

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Aglaophenia latirostris . This featherlike hydroid is common, mostly subtidal , RaceRocks and Swordfish Island. Natural size to 5 cm.4aglaophenia

aglao-1

Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Order Leptothecata (=Leptomedusae)
Family Aglaopheniidae
Genus Aglaophenia
Species latirostris (Nutting, 1900)
Common Name:

This file is provided as part of a collaborative effort by Lester B. Pearson College and local scientists. Copyrighted 1999-All Images on this page are the property of Dr. Anita Brinckmann- Voss..They can not be used or modified without her written permission.
see this link for other hydroids:  https://www.racerocks.ca/tag/hydroid/

Aglaophenia inconspicua : Photomicrography of Dr. Anita Brinckmann-Voss

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Aglaophenia inconspicua (?) (Hydrozoa , Leptothecatae, Aglaopheniidae)

Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Order Leptothecata (=Leptomedusae)
Family Aglaopheniidae
Genus Aglaophenia
Species inconspicua (Torrey, 1902)
Common Name:

This file is provided as part of a collaborative effort by Lester B. Pearson College and local scientists. Copyrighted 1999: All Images on this page are the property of: Dr. Anita Brinckmann-Voss..They can not be used or modified without her written permission.

see this link for other hydroids:  https://www.racerocks.ca/tag/hydroid/

The eagles made several attempts to land on Gr. Race but the gulls are relentless

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Sunday, April 28, 2002 Good Evening
TEMPERATURE: Max. 11.3 ºC »» Min. 7.0 ºC »» Reset 9.5 ºC
MARINE LIFE: 2 mature, 1 juvenile bald eagle- still 3 geese. The eagles made several attempts to land on Gr. Race but the gulls are relentless.Another bright sunny day although the sea was quite choppy.
HUMAN INTERACTION: 5 ecotour boats and 2 pleasure craft through the reserve today.
posted by Carol or Mike S at 6:14 PM
Good Morning
WEATHER : Sky Clear »» Vis. 15 Miles »» Wind West 13 Knots »» Sea 1 Foot Chop
posted by Carol or Mike S at 6:33 AM

bald eagles today looking a little bedraggled

Posted on by
Friday, April 26, 2002
Good Evening
TEMPERATURE: Max. 11.0 ºC »» Min. 6.7 ºC »» Reset 6.9 ºC »» Rain yes Rain 8.8 mm
MARINE LIFE: 2 mature and 1 juvenile bald eagles today looking a little bedraggled in the showers which were quite heavy at times.The 3 geese enjoyed the rain and the ensuing puddles.
HUMAN INTERACTION: 4 Ecotour boats and 1 Pleasure craft through the reserve today. The 2nd Nature was in with Garry, Laura and students for a field lab,unfortunately the rain put a damper on the scheduled outdoor webcast so as all good ‘producers’ Garry improvised.
posted by Carol or Mike S at 6:03 PM
Good Morning
WEATHER: Sky Overcast »» Vis 15 Mile »» Wind West 19 Knots »» Sea 2 – 3 Foot Chop
posted by Carol or Mike S at 6:30 AM

one nest of Black Oyster Catcher eggs.

Posted on by
Thursday, April 25, 2002
Good Evening
TEMPERATURE: Max. 11.9 ºC »» Min. 4.7 ºC »» Reset 9.0 ºC
MARINE LIFE: 3 Bald Eagles -1 juvenile.The eagles left the reserve just after 17:00. We are back to 3 geese again,I’m surprised they haven’t all left for ‘greener pastures’ now that the puddles they enjoyed so much have dried up but for a few slimy inches.Still only the one nest of Black Oyster Catcher eggs.
HUMAN INTERACTION: 5 Ecotour boats, 4 Pleasure craft. 2 of the pleasure craft were fishing in the reserve just after 13:00 but moved on with apologies after being advised of the MPA status. Picked up a drifting commercial crab trap off the east shore of Gr. Race and brought it in for disposal. This afternoon 2 College boats were in with Garry,Laura and students for a dive also Angus with Guests.
posted by Carol or Mike S at 6:22 PM
Good Morning
WEATHER: Sky Clear »» Vis. 15 Miles »» Wind North 3 Knots »» Sea Rippled
posted by Carol or Mike S at 6:26 AM