Variations in food intake of Pecten maximus (L.) from the Bay of Brest (France): Influence of environmental factors and phytoplankton species composition

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-08-01 DOI:10.1016/S0764-4469(01)01349-X

Laurent Chauvaud , Anne Donval , Gérard Thouzeau , Yves-Marie Paulet , Elisabeth Nézan

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引用次数: 43

Abstract

Previous studies carried out in the bay of Brest on daily shell growth of Pecten maximus have demonstrated that temperature is a major control on daily shell growth in contrast to food supply. However, repeated events of slow growth have been observed during diatom and dinoflagellate blooms. The aim of this study was to determine how fluctuations in environmental parameters influence P. maximus food intake and daily shell growth rate. In 1995, P. maximus food intake and growth were highest when Cerataulina pelagica (diatom) blooms occurred and lowest during Gymnodinium cf. nagasakiense (dinoflagellate) blooms. During blooms of other diatom species, P. maximus food intake and growth were high when the algal concentration did not exceed a critical threshold, dependent upon the dominant species and sedimentation rate of diatoms. These results demonstrate that the morphological and physiological features of phytoplankton bloom species strongly affect benthic microphytophagy, a component of benthic–pelagic coupling.

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法国布列斯特湾大佩鱼摄取量的变化:环境因素和浮游植物种类组成的影响

先前在布雷斯特湾进行的关于大佩滕贝壳日生长的研究表明，与食物供应相比，温度是贝壳日生长的主要控制因素。然而，在硅藻和鞭毛藻华期间，已经观察到缓慢生长的重复事件。本研究的目的是确定环境参数的波动如何影响p.a maximus的食物摄取量和日壳生长速度。1995年，在藻华期间，大腹假单胞菌的摄取量和生长量最高，在甲藻华期间，大腹假单胞菌的生长量最低。在其他硅藻华期间，当藻类浓度不超过临界阈值时，p.a maximus的摄取量和生长都很高，这取决于硅藻的优势种和沉积速率。这些结果表明，浮游植物华种的形态和生理特征强烈影响底栖微藻吞噬，这是底栖-远洋耦合的一个组成部分。

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Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie

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