Fatty acid compositions of gonadal material and diets of the sea urchin, Psammechinus miliaris:: trophic and nutritional implications
Fatty acid compositions of gonadal material and diets of the sea urchin, Psammechinus miliaris:: trophic and nutritional implications
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DOI：
10.1016/s0022-0981(00)00301-4
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发表时间：
2000-12-20
影响因子：
2
通讯作者：
Kelly, MS
中科院分区：
文献类型：
--
作者：
Cook, EJ;Bell, MV;Kelly, MS
生殖腺材料的脂肪酸组成进行了检查的海胆Psammechinus miliaris（Gmelin）在水族馆举行，喂养鲑鱼饲料颗粒或macrophage。海带18个月。性腺材料也进行了检查P. miliaris收集从四个现场，包括商业扇贝线结壳贻贝，贻贝，海笼放养大西洋鲑鱼萨尔莫salar和两个潮间带的海湖网站，其特征在于无论是细泥或大型藻类底层。研究了已知和潜在膳食材料的脂肪酸组成。饵料种类和地点对粟粒对虾性腺中某些脂肪酸的比例有显著影响。二十二碳六烯酸（DHA）22：6 n - 3显着高于海胆的性腺喂养鲑鱼饲料在水族馆和收集的鲑鱼笼和扇贝线比在海胆的性腺喂养L。在水族馆和收集从潮间带海洛赫网站saccharina。鲑鱼饲料和贻贝组织也含有高比例的这种脂肪酸。然而，在喂食L. saccharina和收集的两个潮间带海湖网站。L.还发现糖精含有高比例的十八碳四烯酸和花生四烯酸。海胆的性腺收集从潮间带的网站，其特点是泥底层，并从扇贝线被发现含有较低的18：1 n - 9/18：1 n - 7的比例和较高比例的支链和奇链脂肪酸，标志着高饮食细菌输入，比海胆举行的水族馆和收集从鲑鱼笼。20：2和22：2非亚甲基中断的二烯脂肪酸（NMID）在饲喂缺乏这些脂肪酸的饲料中发现，表明从头生物合成。因此，这些结果表明，某些脂肪酸的比例/比率的性腺miliaris可以用来给指示该物种在野外的主要饮食类型。(C)2000 Elsevier Science B. V.保留所有权利。
The fatty acid compositions of gonadal material was examined for the sea urchin Psammechinus miliaris (Gmelin) held in aquaria and fed either salmon feed pellets or the macroalga. Laminaria saccharina for 18 months. Gonadal material was also examined from P. miliaris collected from four field sites, including commercial scallop lines encrusted with the mussel, Mytilus edulis, sea cages stocked with Atlantic salmon Salmo salar and two intertidal sea-loch sites, characterised by either a fine mud or a macroalgal substratum. The fatty acid compositions of known and potential dietary material was examined. The proportions of certain fatty acids in the gonads of P. miliaris were significantly affected by diet type and location. Docosahexaenoic acid (DHA) 22:6 n - 3 was significantly higher in the gonads of the sea urchins fed salmon feed in aquaria and collected from the salmon cages and scallop lines than in the gonads of the sea urchins fed L. saccharina in aquaria and collected from the intertidal sea loch sites. The salmon feed and the mussel tissue also contained a high proportion of this fatty acid. Stearidonic acid 18:4 n - 3 and arachidonic acid 20:4 n - 6, however, were found in significantly higher proportions than DHA in the gonads of the sea urchins fed L. saccharina and collected from the two intertidal sea-loch sites. L. saccharina was also found to contain high proportions of stearidonic and arachidonic acid. The gonads of the sea urchins collected from the intertidal site, characterised by a mud substratum, and from the scallop lines were found to contain a lower 18:1 n - 9/18: 1 n - 7 ratio and a higher proportion of branched and odd-chained fatty acids, signifying a high dietary bacterial input, than the sea urchins held in the aquaria and collected from the salmon cage. 20:2 and 22:2 non-methylene interrupted dienoic fatty acids (NMIDs) were found in P. miliaris fed diets lacking there fatty acids suggesting de novo biosynthesis. These results, therefore, suggest that the proportions/ratios of certain fatty acids in the gonads of P. miliaris could he used to give an indication of the predominant diet type of this species in the wild. (C) 2000 Elsevier Science B.V. All rights reserved.