Food intake and digestion in the scavenging lysianassid gammaridean Scopelocheirus onagawae
Food intake and digestion in the scavenging lysianassid gammaridean Scopelocheirus onagawae
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食腐动物 Scopelocheirus onakawae 的食物摄入和消化
DOI：
10.1111/j.1444-2906.2005.01021.x
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发表时间：
2005
影响因子：
1.9
通讯作者：
M. Omori
中科院分区：
文献类型：
--
作者：
Keiichiro Ide;K. Sasaki;M. Omori
以含食用色素的鱼酱为饵料，对生活在温带浅水沃茨的女川氏钩螯蟹（Scopelocheirus onagawae）的消化时间和摄食量进行了研究，并与冷水性鱼类进行了比较。2001年5月至11月，在日本东北部的女川湾，使用诱饵诱捕器采集标本。消化时间实验在8°C下进行，食物摄入量实验在6、8、13、18和21°C下进行。每只喂食鱼浆的个体在3%氨乙醇溶液中粉碎以提取食用染料。在消化后，测量上清液的荧光强度并转化为食物摄入。0-h不摄食的个体显示出约1.0%的相对摄食量，24-h不摄食的个体显示出4.3%的相对摄食量。根据所有摄食个体的饱食率为3.6 - 4.1%的结果，认为该物种在24 h内完全消化食物。饱食率远低于冷水性鱼类。成千上万的S。据推测，女川会聚集在尸体上，并在日落后的短时间内将其吃掉。
The lysianassid gammarid Scopelocheirus onagawae, which inhabits temperate shallow waters, was investigated for its digestion time and amount of food intake in feeding experiments with fish paste containing food dye as bait, being compared to those of cold-water species. The specimens were collected in Onagawa Bay, north-eastern Japan, from May through November 2001, using baited traps. The experiment on digestion time was run at 8°C, and the experiment on amount of food intake at 6, 8, 13, 18 and 21°C. Each individual that was fed fish paste was crushed in 3% ammoniaethanol solution to extract the food dye. After centrifuging, the fluorescence intensity of the supernatant was measured and converted to food intake. Individuals of 0-h non-feeding showed the relative food intake of approximately 1.0%, and those of 24-h non-feeding showed the value of 4.3%. Based on the finding that the satiation ratio ranged from 3.6 to 4.1% for all feeding individuals, this species were considered to digest food completely within 24 h. The satiation ratios were much less than those of cold-water species. Several tens of thousands of S. onagawae were inferred to congregate on carcasses and consume it in a short period after sunset.