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首页> 外文期刊>Journal of great lakes research >Pathways of Food Uptake in Native (Unionidae) and Introduced (Corbiculidae and Dreissenidae) Freshwater Bivalves
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Pathways of Food Uptake in Native (Unionidae) and Introduced (Corbiculidae and Dreissenidae) Freshwater Bivalves

机译：本地（Un科）和引进（Cor科和Dreissenidae）淡水双壳类食物摄取的途径

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Nineteen species of adult freshwater bivalves were able to use water currents generated from within the mantle cavity to move non-suspended algae into the shell through non-siphon areas such as the anterior shell valve edge and the mid-ventral point of the shell. This was in addition to, and not in replacement of, uptake of planktonic algae through the inhalant siphon. Algae obtained from both the non-inhalant siphon areas and the inhalant siphon were equally captured and transferred to the stomach. Pseudofecal release was also more complex than typically stated. Pseudofeces were released from the inhalant siphon (as expected), plus from the anterior shell margin, and at the mid-point along the ventral shell edge (non-dreissenids). Pseudofeces that settled near the ventral shell margin was accessible for future uptake back into the mantle cavity. There were no species or body size differences in ability to capture food from non-planktonic sources. The extent to which natural populations utilize benthic food resources remains to be determined. However, our study demonstrates that bivalve communities are very adaptable in accessing a variety of food resources from both suspended material in the water column, as well as organic material from the sediments.
机译：19种成年淡水双壳类动物能够利用在地幔腔内产生的水流将非悬浮藻类通过非虹吸区（例如前壳瓣膜边缘和壳中腹点）移入壳中。这是对通过吸入虹吸吸收浮游藻类的补充，而不是替代。从非吸入虹吸区和吸入虹吸区获得的藻类均被捕获并转移到胃中。伪大便的释放也比通常所说的更为复杂。假粪便从吸入虹吸管释放（如预期的那样），从前壳边缘以及沿腹壳边缘的中点释放（非十二指肠类）。可以在腹壳边缘附近放置假粪便，以便将来将其吸收回地幔腔中。从非浮游生物来源捕获食物的能力上没有物种或体型差异。自然人口利用底栖食物资源的程度尚待确定。但是，我们的研究表明，双壳类动物群落非常适合从水柱中的悬浮物以及沉积物中的有机物中获取各种食物资源。

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