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首页> 外文期刊>Cybium >Food and feeding habits of the Caspian marine shad, Alosa braschnikowi (Clupeidae) in the southern Caspian Sea
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Food and feeding habits of the Caspian marine shad, Alosa braschnikowi (Clupeidae) in the southern Caspian Sea

机译：里海南部的里海海洋sha鱼（Alosa braschnikowi（Clupeidae））的食物和摄食习惯

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摘要

The feeding habits of Caspian marine shad, Alosa braschnikowi (Borodin, 1901) in Iranian waters of soutpian Sea were investigated by stomach content analysis of 357 fish collected monthly (October 2003 to April 2004) in the commercial catch. The diet consisted mainly of fish dominated by Atherinidae (58%), with Atherina boyeri being the dominant prey item based on numerical percentage. The next major food group was Gobiidae (26%), followed by Clupeidae (1 l%),Cyprinidae (3%), and Mugilidae (1%). Based on frequency of occurrence, A. boyeri was the main prey in the stomach of Caspian marine shad (F,- = 57.7%), with an important species index (ISI) of 59.7%. The fish fed on a wider variety of food items during November, December and February than during other months. The lowest feeding activity was recorded in October and January. The gastrosomatic index (GaSI) ranged from 0.3% to 27.7% with monthly variations increase in February and March coincides closely with spawning season and energy preservation for gonadal development.
机译：通过对每月商业捕鱼中收集的357条鱼的胃内含量分析，调查了里海的海d Alosa braschnikowi（Borodin，1901年）在伊朗南欧海域的摄食习惯。饮食主要由以A科（Atherinidae）为主的鱼组成（58％），按数值百分比计，Atherina boyeri是主要的猎物。下一个主要的食物类别是戈壁科（26％），其次是C科（1 l％），y科（3％）和Mu科（1％）。根据发生的频率，伯氏曲霉是里海marine鱼胃中的主要猎物（F，-= 57.7％），重要物种指数（ISI）为59.7％。与其他月份相比，该鱼在11月，12月和2月期间吃的食物种类更多。最低的摄食活动记录在十月和一月。胃体指数（GaSI）在0.3％至27.7％之间，2月和3月的月度变化增加，与产卵季节和性腺发育的能量保存密切相关。

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