Monthly Archives: May 2007

Dodecaceria concharum: coralline fringed tube worm–The Race Rocks Taxonomy

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Typically, this Terebellid tube worm appears as a slight fuzz on the surface of the pink lithothamnion or on the hydrocorals.

dodecaceria

Taken in 2009 by Ryan Murphy off the North side of Great Race Rock. Note the sculpin with cryptic colouration.

rmsculp13a

A close up view of a colony of Dodecaceria concharum emerging from Lithothamnion. On the left is the cryptically coloured sculpin that takes advantage of the background for blending in. Photo by Ryan Murphy.

dodecaceria

Photo by Dr.A. Svoboda

Domain: Eukarya
Kingdom: Animalia
Phylum: Annelida
Class: Polychaeta
Subclass: Palpata
Order: Canalipalpata
Suborder: Terebellida
Family: Cirratulidae
Genus: Dodecaceria
Species: concharum (Oerstad,1851)
Common Name: coralline fringed tube worm
Other Annelids 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. Garry Fletcher, 2006

 

Anser albifrons: Greater White-fronted Goose–The Race Rocks Taxonomy

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raisawhitefroint

4 white fronted geese are still in the areaa

4 white fronted geese -Oct. 2014- G. Fletcher photo

In May 15, 2007, Mike and Carol photographed this lone rare migrant above at Race Rocks. Perhaps the same one was photographed on Sept 8 2007. This may be a good indicator of migration stop-over times.

Domain Eukarya
Kingdom Animalia
Phylum Chordata
Sub-Phylum Vertebrata
Class Aves
Order Anseriformes
Family Anatidae
Genus Anser
Species albifrons
Common Name: Greater White-fronted Goose

This file is provided as part of a collaborative effort by the students, faculty, staff and volunteers of Lester B. Pearson College
Date: May 15, 2007  — Carol and Mike Slater

See the other entries in the log on this species

See other animals which have so far been been tagged with species

 

Lithothamnion sp.: Pink encrusting algae–The Race Rocks Taxonomy

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rhodcrust

Lithothamnion sp. Photo by Ryan Murphy

Lithothamnion sp. is one of the most abundant of the red algaes at Race Rocks since it covers most of the rock surface in the subtidal zone. In the images below by Ryan Murphy this encrusting algae is the predominant substrate.

 

rmsept0310clav copy rmsculp10l
A cluster of the hydroid Clavularia sp. A sculpin exhibits cryptic colouration as it blends into the background
rmsnailcasel copy lithothamnion
Due to the high calcium carbonate content of it’s thamnion, it can only be grazed by molluscs such as this lined chiton with very hard rasping radulas above the ring of nudibranch eggs. The holdfast of a kelp spreads over the Lithothamnion surface.
rm porcelaincrab rmsculp13a copy
A porcelain crab hovers over the surface of rocks covered in Lithothamnion The small black tentacles of the annelid Dodecaceriia concharum: the coralline -fringed tube worm are dispersed evenly through the layer of Lithothamnion.

Domain: Eukarya
Kingdom: Protoctista
Phylum: Rhodophyta
Class: Florideophyceae
Order: Cryptonemiales
Family: Corallinaceae
Genus: Lithothamnion
Species: sp.
Common Name: Pink encrusting coralline alg
The following video was done by Victor Rakou in the week of June1 2000. We have assembled here various segments of video to illustrate the community of organisms which live on and around Lithothamnion in the subtidal area at about 5 to 8 meters off the North side of Great Race Rocks, just out from the docks. In some areas large rock surfaces are completely covered with this encrusting red algae.. See also the blue waved chiton pictures where you can see photos of Lithothamnion lining the vertical sides of some of the lower level tidepools near peg 6. It also thrives in the tidepools east of the docks (peg 14b)

Lithothamnion sp.: Pink encrusting algae–The Race Rocks Taxonomy


Other Rhodophytes or Red Algae 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. Garry Fletcher, 2007