Pattern of Night Activity in the Prickleback Fish Ernogrammus hexagrammus

Pattern of Night Activity in the Prickleback Fish Ernogrammus hexagrammus The ecology of the six-lined prickleback, Ernogrammus hexagrammus (Stichaeidae: Perciformes), a fish with nocturnal activity, has been studied in Peter the Great Bay, Sea of Japan. It is found that during the day the fish hide themselves in refuges between stones. In the evening they move to sandy areas for foraging. The mean distance between neighboring specimens in the night time equals 2.77 m; the density and biomass of the fish averages 0.12 specimens/m2 and 3.85 g/m2, respectively. Polychaetes and mysids constitute the bulk of the food by weight and the occurrence frequency, respectively. The morphological adaptations to inhabit two different biotopes consist of well-developed seismosensory and olfactory systems, the serpentine body shape, and the cryptic coloration. Behavioral adaptations include solitary behavior with a low level of contacts and aggression. Russian Journal of Marine Biology Springer Journals

Pattern of Night Activity in the Prickleback Fish Ernogrammus hexagrammus

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2004 by MAIK “Nauka/Interperiodica”
Life Sciences; Freshwater & Marine Ecology
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