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首页> 外文期刊>Turkish Journal of Fisheries & Aquatic Sciences >Vertical Distribution and Feeding Ecology of the Black Scraper, Thamnaconus modestus, in the Southern Sea of Korea
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Vertical Distribution and Feeding Ecology of the Black Scraper, Thamnaconus modestus, in the Southern Sea of Korea

机译：韩国南部海域的黑色刮craThamnaconusmodetus的垂直分布和觅食生态

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摘要

We investigated the vertical distribution and feeding ecology of the black scraper, Tamnaconus modestus, in the southern sea of Korea in the spring of 2009, 2010 and 2011 using otter trawl for 60 min per site. Fish abundance was significantly related to the basis of depth and temperature. Thamnaconus modestus occurred at depths ranging from 80 to 120 meter waters having temperature higher than 12 degrees C. We found that 87% of the total catch were obtained at the depths between 80 and 120 meters (58% and 29% from 80-100 and 100-120 meters respectively). The total length of captured individuals ranged from 10.6 to 38.7 cm. Individuals captured at deeper were significantly larger than those from shallower sites. Diverse prey organisms, including algae, amphipods, gastropods, ophiuroids, and cephalopods, were found in T. modestus stomach. The main prey items in IRI value belonged to four groups: hyperiid amphipods, gastropods, ophiuroids, and algae. The fish showed ontogenetic diet shifts. In general, individuals in smaller size (<20 cm) shifted their diets from vegetative food sources to animal ones when they reach the size bigger than 20 cm. Food diversity increased with fish size. Our findings suggested that T. modestus vertical distribution varied with depth and that fish showed ontogenetic diet shifts
机译：我们在2009年春季，2010年和2011年春季使用水獭拖网在每个站点调查了韩国南部海域黑色刮刀Tamnaconusmodetus的垂直分布和摄食生态。鱼的丰度与深度和温度的基础显着相关。 Thamnaconusmodetus发生在温度高于12摄氏度的80至120米水深处。我们发现，总捕获量的87％是在80至120米的水深处获得的（80-100和58％分别为58％和29％）分别为100-120米）。被捕人员的总长度为10.6至38.7厘米。在较深处捕获的个体明显大于在较浅处捕获的个体。在T.modestus胃中发现了各种捕食生物，包括藻类，两栖类，腹足类，类蛇类和头足类。 IRI值中的主要猎物分为四类：双节肢动物两栖类，腹足类，蛇类和藻类。这条鱼表现出个体饮食的变化。一般而言，个体较小（<20厘米）的个体在其个体大于20厘米时，其饮食将从植物性食物转向动物性食物。食物多样性随着鱼的大小而增加。我们的发现表明，T.modetus的垂直分布随深度而变化，并且鱼类显示出个体发育的饮食变化

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