Feeding of adult sea bream &lt;i&gt;Brama japonica&lt;/i&gt; in the Pacific Ocean and the Bering Sea

Alexander Ya Efimkin

doi:10.26428/1606-9919-2014-176-210-215

Abstract

Feeding habits of adult sea bream are considered on the samples collected in the North Pacific and Bering Sea in the last several years. This species is a predator with the diet highly dependent on its habitat and composition of prey (small-sized fish and squids). It has two or three peaks of consumption daily, which change seasonally and year-to-year; anyway, the morning (3-6 a.m.) is usually the time of the lowest consumption, at least in summer and autumn, and the daytime is the normal time for feeding. The sea bream does not eat zooplankton usually, but Euphausia pacifica was a significant portion of its diet (34 %) in the southern part of surveyed area in the summer of 2009, possibly because of high concentrations of euphausiids in that area. Daily ration of adult sea bream is 2.5-3.5 % of its body weight.

Highlights

Feeding habits of adult sea bream are considered on the samples collected in the North Pacific and Bering Sea in the last several years
This species is a predator with the diet highly dependent on its habitat and composition of prey
It has two or three peaks of consumption daily, which change seasonally and year-to-year; anyway, the morning (3–6 a.m.) is usually the time of the lowest consumption, at least in summer and autumn, and the daytime is the normal time for feeding

Summary

Известия ТИНРО

ПИТАНИЕ ВЗРОСЛОГО ЯПОНСКОГО МОРСКОГО ЛЕЩА BRAMA JAPONICA В ТИХОМ ОКЕАНЕ И БЕРИНГОВОМ МОРЕ. Показаны особенности питания взрослого морского леща в Тихом океане и Беринговом море в течение последних нескольких лет. На юге в желудках взрослого морского леща обнаружено значительное количество эвфаузиид Euphausia pacifica — в среднем 33,8 % общего объема пищи по району исследований, что связано с высокой концентрацией эвфаузиид в районе исследований. Ключевые слова: японский морской лещ, Brama japonica, хищник, суточный ритм питания, наполнение желудков. Efimkin A.Ya. Feeding of adult sea bream Brama japonica in the Pacific Ocean and the Bering Sea // Izv. TINRO. Feeding habits of adult sea bream are considered on the samples collected in the North Pacific and Bering Sea in the last several years This species is a predator with the diet highly dependent on its habitat and composition of prey (small-sized fish and squids). Целью нашей работы был анализ особенностей питания взрослого морского леща в северо-западной части Тихого океана в первое десятилетие 2000-х гг

Материалы и методы

Результаты и их обсуждение

Количество проб

Findings

Zaprora silenus