Ontogenetic changes in the feeding habits of an abalone Haliotis discus hannai: field verification by stable isotope analyses
Ontogenetic changes in the feeding habits of an abalone Haliotis discus hannai: field verification by stable isotope analyses
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鲍鱼鲍鱼摄食习性的个体发生变化：通过稳定同位素分析进行现场验证
DOI：
10.1139/f09-187
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发表时间：
2010
影响因子：
2.4
通讯作者：
Takami H andWatanabe Y
中科院分区：
文献类型：
--
作者：
Won N-I;Kawamura T;Takami H andWatanabe Y
首次利用稳定同位素分析在自然栖息地阐明了鲍鱼 Hannai 鲍鱼食性的个体发育变化。鲍鱼个体分为三个发育阶段：小型幼体（<10 毫米壳长 (SL)）、大型幼体（10-50 毫米 SL）和成体（>50 毫米 SL）。自然饮食的推论表明，底栖硅藻、小型红藻和（或）幼年褐藻和成体褐藻分别是小型幼体（6.5±1.0mm SL）、大型幼体（23.7±6.1mm SL）和成体（81.8±14.3mm SL）的主要食物来源。三个采样站的鲍鱼 δ13C 变化相似，可以通过摄食习性的个体发育变化来解释。鲍鱼中 δ13C 的减少（≤20 mm SL）表明从硅藻摄食到幼年褐藻和（或）小型红藻摄食的转变，而随后 δ13C 的增加（>20 mm SL）则表明从摄食到成年褐藻的转变。这些结果证明了鲍鱼食性个体发生变化的假设。讨论汉奈。
The ontogenetic changes in the feeding habits of the abalone Haliotis discus hannai were elucidated for the first time in natural habitats using stable isotope analyses. Abalone individuals were grouped into three developmental stages: small juveniles (<10 mm shell length (SL)), large juveniles (10–50 mm SL), and adults (>50 mm SL). The inferences of natural diets indicated that benthic diatoms, small red macroalgae and (or) juvenile brown macroalgae, and adult brown macroalgae were the primary food sources for small juveniles (6.5 ± 1.0 mm SL), large juveniles (23.7 ± 6.1 mm SL), and adults (81.8 ± 14.3 mm SL), respectively. The changes of δ13C in abalone were similar among three sampling stations and were explained by ontogenetic changes in feeding habits. The decrease of δ13C in abalone (≤20 mm SL) indicated a transition from diatom feeding to juvenile brown macroalgae and (or) small red macroalgae feeding, whereas the subsequent increase of δ13C (>20 mm SL) represented a feeding transition to adult brown macroalgae. These results prove the hypothesis of the ontogenetic changes in the feeding habits of the abaloneH. discus hannai.