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首页> 外文期刊>Journal of Shellfish Research >LONG-TERM CHANGES IN INTRA- AND INTER-SPECIFIC RELATIONSHIPS IN A COMMUNITY OF SCALLOPS AND SEA STARS UNDER BOTTOM SCALLOP MARICULTURE
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LONG-TERM CHANGES IN INTRA- AND INTER-SPECIFIC RELATIONSHIPS IN A COMMUNITY OF SCALLOPS AND SEA STARS UNDER BOTTOM SCALLOP MARICULTURE

机译：底部扇贝习俗下扇贝和海星群落内部和种间关系的长期变化

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摘要

Changes in a common benthic community of mobile Japanese scallops Patinopecten (= Mizuhopecten) yessoensis and predatory sea stars under introduction of mariculture were assessed by comparing the distribution and abundance of each species, and the relationships between densities of these community elements in natural biotope and after twice-repeated seeding of young scallops on the bottom. Under maricultre, at high scallop density (up to 6 ind./m(2)), the scallop growth rates noticeably decreased. The density of the sea star Asterina (= Patiria) pectinifera markedly decreased, and its distribution was not dependent on scallop density both before and during mariculture. mean sea star Distolasterias nipon density was also diminished, but aggreagate response to high prey density increased. In contrast, the sea star Asterias amurensis density noticeably increased, and it positively correlated with scallop density before and during mariculture. The reduction of densities of sea stars A. pectinifera and D. nipon in mariculture conditions is likely to be explained by the increase in abundance of the large and mobile sea star A. amurensis as the competition for food resources seems to occur. Even big 2-y-old scallops (85.4 +/- 1.5 mm shell height) at high density (>2 or 4 scallops per m(2), for different sea stars) attract such predatory sea stars as A. amurensis and D. nipon. The results indicate that seeding of young scallops on the bottom and especially reseeding markedly increase the attraction of the biotope to predatory sea stars for a long time.
机译：通过比较每个物种的分布和丰度，以及在自然生物群落和之后生物群落中这些群落元素的密度之间的关系，评估了海水养殖下日本流动扇贝扇贝（Pizunopecten）yessoensis和掠食性海星的共同底栖生物群落的变化。在底部重复两次幼贝的播种。在海水养殖条件下，在高扇贝密度下（高达6 ind./m(2）），扇贝的生长速度明显降低。海星Asterina（= Patiria）果胶的密度显着降低，并且其分布与海水养殖之前和期间的扇贝密度无关。平均海星Distolasterias nipon密度也降低了，但对高密度猎物的聚集反应增加了。相比之下，海星Asmurs amurensis密度显着增加，并且与海水养殖之前和期间的扇贝密度呈正相关。在海水养殖条件下，海星A. pectinifera和D. nipon的密度降低可能是由于大型和活动海星A. amurensis的丰度增加所致，因为似乎正在争夺食物资源。即使是高密度的2岁扇贝（壳高85.4 +/- 1.5毫米）（对于不同的海星，每m> 2或4个扇贝，对于不同的海星）也会吸引像A. amurensis和D.这样的掠食性海星。日本人结果表明，在很长一段时间内，在底部特别是重新播种的扇贝幼苗明显增加了生物群落对掠食性海星的吸引力。

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