Diet of two species of freshwater eel (Anguilla spp.) in Lake Pounui, New Zealand
Diet of two species of freshwater eel (Anguilla spp.) in Lake Pounui, New Zealand
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新西兰普努伊湖两种淡水鳗鱼（安圭拉属）的饮食
DOI：
10.1080/00288330.1989.9516334
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发表时间：
1989
影响因子：
1.6
通讯作者：
D. Jellyman
中科院分区：
文献类型：
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作者：
D. Jellyman
摘要研究了淡水鳗鲡（Anguilla australis Richardson）和澳洲鳗鲡（Anguilla australis Richardson）共存种群的食性。在Wairarapa的Pounui湖研究了长鳍鳗鱼（diffenbachii Gray）。综合使用各种取样设备，对682条短鳍鳗鱼和310条长鳍鳗鱼进行了取样，长度从13厘米到135厘米不等。这两个物种可能是间歇性的饲料和机会主义者，消费广泛的食物项目，虽然个别鳗鱼的喂养通常是选择性的单一猎物物种。各物种的食性随个体大小而变化。最小的两个物种的鳗鱼主要吃的是双足类和昆虫幼虫;蜗牛Potamopyrgus antipodarum是占主导地位的食物生物为30-69厘米的短鳍鳗鱼，但不重要的长鳍鳗鱼。> 40 cm的长鳍鳗主要以鱼为食，但鱼直到> 70 cm才成为短鳍鳗食物的重要组成部分。在相似的大小，这两个物种有不同的饮食。同一品种的鳗鱼，但...
Abstract Feeding habits of co‐existing populations of the freshwater eels, Anguilla australis Richardson (shortfinned eel), and A. dieffenbachii Gray (long‐finned eel) were studied in Lake Pounui, Wairarapa. A combination of sampling equipment gave a sample of 682 shortfinned eels and 310 longfinned eels ranging in length from 13 to 135 cm. Both species probably feed intermittently and are opportunistic feeders, consuming a wide range of food items, although feeding of individual eels was normally selective for a single prey species. Diet of each species changed with size. Smallest eels of both species ate mainly amphiphods and insect larvae; the snail Potamopyrgus antipodarum was the dominant food organism for shortfinned eels of 30–69 cm but was unimportant to longfinned eels. Longfinned eels > 40 cm were principally piscivorous but fish did not become an important part of shortfinned eel diet until eels were > 70 cm. At similar sizes, the two species had different diets. Eels of the same species but fr...