DIET OF ORANGE ROUGHY, HOPLOSTETHUS-ATLANTICUS (PISCES, TRACHICHTHYIDAE) ON THE CHALLENGER PLATEAU, NEW-ZEALAND
DIET OF ORANGE ROUGHY, HOPLOSTETHUS-ATLANTICUS (PISCES, TRACHICHTHYIDAE) ON THE CHALLENGER PLATEAU, NEW-ZEALAND
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DOI：
10.1007/bf00391992
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发表时间：
1988-01-01
期刊：
影响因子：
2.4
通讯作者：
WEBBER, WR
中科院分区：
文献类型：
--
作者：
ROSECCHI, E;TRACEY, DM;WEBBER, WR
对来自挑战者高原的 687 个橙子 [Hoplostethus atlanticus (Collett, 1889)] 的胃内容物进行了检查，这些橙子于 1984 年 3 月、7 月和 11 月取样。饮食中不同成分的相对重要性是使用三个喂养指数来评估的，这些指数以不同的方式结合了猎物类别的出现频率百分比、数量百分比和重量百分比。对于男女、各种体型和一年中的任何时间，饮食中最常见和最丰富的成分是虾，其次是鱼、鱿鱼、片足类和糠虾。主要的游泳十足目动物科有Oplophoridae、Pasiphaeidae 和Sergestidae。按重量计算，鱼类（主要是 Chauliodontidae 和 Myctophidae）是最重要的猎物。大多数猎物物种是底栖和中层生物，它们在夜间向水面移动。然而，H. atlanticus 可以在任何 24 小时内被底拖网（750 至 1,200 m 之间）捕获，并且没有证据表明它们有为了寻找猎物而垂直迁移的情况。当鱼体长时，饮食会从虾、糠虾和鱼转变为虾、鱼和鱿鱼。小于20厘米的鱼胃内容物中未发现鱿鱼。这些饮食变化可能与生长过程中形态的改变有关。主要饮食项目（尤其是游泳十足目动物）的相对比例随一年中的不同时间而变化。此外，胃数据似乎表明鱼和鱿鱼在更深水域的饮食中越来越重要。 H. atlanticus 似乎是一种机会主义捕食者，捕食多种无脊椎动物和鱼类。我们的研究结果提供了证据支持这一观点，即捕食垂直洄游的中层鱼类的底栖捕食者在向底栖生物转移能量方面发挥着重要作用。
Stomach contents of 687 orange roughly [Hoplostethus atlanticus (Collett, 1889)] from the Challenger Plateau, sampled in March, July and November 1984, were examined. The relative importance of different components of the diet was assessed using three feeding indices which combine, in different ways, percentage frequency of occurrence, percentage number, and percentage weight of prey categories. For both sexes, for all size classes and at any time of the year, the most frequent and abundant components of the diet were prawns, followed by fish, squid, amplipods and mysids. The main natant decapod families were Oplophoridae, Pasiphaeidae, and Sergestidae. Fish, mainly Chauliodontidae and Myctophidae, were the most important prey by weight.. Most prey species were benthopelagic and mesopelagic organisms which move towards the surface at night. However, H. atlanticus can be caught by bottom trawl (between 750 and 1,200 m) during any 24 h period, and there was no evidence of vertical migration in search of their prey. When the fish grow in length, there is a transition in the diet from prawns, mysids, and fish, to prawns, fish and squid. Squid were not found in the stomach contents of fish smaller than 20 cm. These dietary changes may be linked to modifications in morphology with growth. The relative proportions of the main dietary items, and in particular the natant decapod families, varied with time of the year. Also, the stomach data seem to indicate an increasing importance of fish and squid in the diet in deeper water. H. atlanticus appears to be an opportunistic predator, consuming a wide variety of invertebrates and fishes. Our results provide evidence to support the notion that benthopelagic predators which consume vertically migrating mesopelagic fish, have an important role in the transfer of energy to the benthos.