Scorpaenichthyes marmoratus : Cabezon –The Race Rocks Taxonomy

 

Cabezon:(literally big head in Spanish ) is a benthic fish that lives among the kelp holdfasts and rocky areas, usually very close to the bottom. It is often so confident of its camouflage that it will not move when approached by divers. Note the multi colored eye. These fish will lunge at almost anything that moves on the bottom. Dissections of their stomachs reveal amphipods and small crabs, pieces of kelp (and even rocks they have grabbed when foraging for other invertebrates.)

Cabezon are normally benthic or bottom-dwellers, living among rocks and seaweeds in tide pools. Sometimes they live just below the water’s surface among the marine plants. Their coloration allows them to remain well camouflaged. Their habitat is most likely rocky, sandy and muddy bottoms, living in areas with a depth range of 0 to 200 meters. Moreover, young cabezon feed on small crustaceans like amphipods, shrimp, and crabs. The adults feed on crustaceans, marine worms and mollusks, including clams and abalone. They can swallow a whole abalone and later regurgitate the indigestible shell; therefore, their tropic level is that of a secondary carnivore. In addition, the limiting factors that will affect the development and growth of this population in a certain habitat will be the presence of enough light, temperature and the availability of food and living space

Their maximum length and weight are 99.0 centimeters and 14.0 Kilograms respectively. This organism can be seen in the Eastern Pacific, which covers the areas from Southeastern Alaska to Punta Abrejos, in Central Baja California, Mexico. Race Rocks is located in the centre of this range. In this map we can see the range of this fish.

Reference The National Biological Information Infrastructure (NBII) BioBot
http://www.elasmodiver.com/BCMarinelife/BCML%20Chordata.htm

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 2005- Diomedes Saldana PC -Greco

Calidris ptilocnemis: Rock Sandpiper

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Male Rock Sandpiper photo by Ryan Murphy

Rock sandpiper

Rock Sandpiper photo by Raisa Mirza

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Inset from the photo below showing the rock sandpipers in the foreground. The larger birds are the surfbirds. Several Black Turnstones are also in the image below.

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Click to enlarge to see the difference between the rock sandpipers and the surfbirds. There is also a black turnstone lower right:  Photo by Ryan Murphy

Habitat
During the breeding season, rock sandpipers nest on the  dry, barren tundra. The rest of the year, they are  found on the rocky shores such as at Race Rocks

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Photo by Ryan Murphy

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Rock sandpiper- winter plumage , Nov 22, 2012:  Photo by Raisa Mirza

Behavior and feeding:

Rock Sandpipers are usually found singly, in small groups, or as can be seen above,  in flocks with black turnstones and surfbirds. Unlike the other birds in the photo, rock sandpipers do not get prey attached to the rock,  They move regularly pick up moving prey from the crevices and seaweed among the rocks. Rock Sandpipers are unusual in that they eat vegetable matter, including algae, or seeds as well as invertebrates.

 Classification:

Domain Eukarya
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Aves
Order Charadriiformes
Family Scolopacidae
Genus Calidris
Species ptilocnemis
Common Name: Rock Sandpiper
This file is provided as part of a collaborative effort by the students, faculty, staff and volunteers of Lester B. Pearson College February. 2009 Garry Fletcher

Calidris mauri: Western sandpiper–The Race Rocks Taxonomy

This shorebird breeds in Western Alaska but is very abundant in migration all over North America.

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Western Sandpiper photographed by Ecoguardian Anne Stewart, October 12, 2014

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Ryan Murphy took this first picture of the western sandpiper, Calidris mauri in late October, 2009 . The dark legs distinguish it from the Least Sandpiper.

Domain Eukarya
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Aves
Order Charadriiformes
Family Scolopacidae
Genus Calidris
Species mauri
Common Name: Western Sandpiper

See other posts tagged Western Sandpiper

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.