Tag Archive: perches


TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii (ray-finned fishes)
Order: Perciformes (Perch-likes)
Family:Embiotocidae (Surfperches)

Genus/species:  Cymatogaster aggregata

GENERAL CHARACTERISTICS: Shiner surfperch are small, deep-bodied fish, silvery colored with rows of dark spots on the scales that form vague black stripes on sides crossed by three vertical yellow bars. Males cover their shiny silver and yellow stripes with a darker courtship colors during the summer. Their maximum length is to 20 cm (8 in).

DISTRIBUTION AND HABITATShiners are found from Wrangell, Alaska to Baja California. Within their range, they are a common fish in shallow water around eelgrass beds, piers, pilings and oil platforms, and are also found in calm, shallow waters along the coast. They live in loose schools to depths of 146 m (480 ft). They are also known to enter brackish and fresh waters, and are common in San Francisco Bay.

DIET IN THE WILDTheir diet includes small crustaceans, crab larvae, and polychaete worms, as well as planktonic copepods, amphipods, fish eggs, algae and diatoms.

PREDATORS: These small fish are preyed upon by other fishes, including kelp bass, sand bass, and halibut as well as by harbor seals. They are caught along almost all shoreline fishing areas, probably the most common fish taken by recreational anglers along the California coast and in estuaries.

REPRODUCTION:Shiner surfperch mate during the summer; young are born the following spring or summer. Fertilization is internal, embryos are nourished internally, and females give birth to about 20 live young. Litter size varies from 4 to 25. Some males are sexually active immediately after their birth. Females grow faster than males. Their live span is at least six to eight years.

CONSERVATION: IUCN Red List  Least Concern (LC)

LOCATION: Tidepool

References

Ron’s Flickr http://www.flickr.com/photos/cas_docents/sets/72157626486149324/

Ron’s WordPress :  http://wp.me/p1DZ4b-wj  

fishbase  www.fishbase.org/summary/Cymatogaster-aggregata.html

ADW  animaldiversity.org/accounts/Mytilus_californianus/

EOL eol.org/pages/1012531/overview

                

TAXONOMY
Class: Actinopterygii (ray-finned fishes)
Order: Perciformes (Perch-likes)
Family: Percidae (Perches)

Genus/species:  Perca flavescens 

Yellow Perch 3270754327_18c03d6f85_b

GENERAL CHARACTERISTICS: Background color yellowish
overlaid by 6–8 dark vertical bars on the sides. Sexual dimorphism: females grow faster and become larger than males. Max. size: ~50 cm (20 inches), common length 19 cm (7.5 inches).

DISTRIBUTION/HABITAT: West central Canada and the Hudson Bay area east to New Brunswick, south to South Carolina, and west to Kansas. Also found in the Atlantic, Arctic, and Great Lakes. Found in freshwater lakes as well as impoundments of larger rivers, also smaller ponds and rivers. Known in both brackish water and salt lakes. Prefers clear water, though can tolerate low oxygen levels.

DIET IN THE WILD: P. flavescens have small backward slanting teeth lining the jaws and gill rakers that strain out small pelagic food sources from the water such as insects, larger invertebrates, fishes and fish eggs. Diurnal feeder.

PREDATORS: Fishes and birds.

LONGEVITY: To 12 years.

CONSERVATION: IUCN Not listed but fishing has been restricted in some Great kale states do to fluctuating populations.

REMARKS: Marketed as a common food fish with a commercial fishery in Lake Michigan, Lake Erie, and Lake Huron.

Water Planet, Water Temperature (perch under ice) WP10

flickr  http://www.flickr.com/photos/cas_docents/sets/72157608608528651/with/3270754327/

WordPress Shortlink http://wp.me/p1DZ4b-120

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