Studies on the development and ecology of the macrourid larvae in Suruga Bay.

本研究的主要结果如下：1.采用网采法采集了大量的长尾大眼鲷卵，进行了长尾大眼鲷的胚胎发育和卵黄囊仔鱼的孵化试验。被描述。2.在350 m深度采集的幼鱼个体数达189头。根据体尺和黑色素细胞形态将其分为6个类型，并进一步鉴定为Coryphaenoides marginatus，Caelorinchus kishinouyei，Caelorinchus kischinouyei，和Ventrifossa garmani的幼虫和成虫之间的DNA的碱基对的一致性。其余两个类型因其小而缺乏特征，甚至没有被划分为属。描述了前4种的幼虫，并结合以往的报道，总结了属的分类特征。3.采集了桑科（Moridae）的珍稀鱼类约氏Harargyreus johnsonii幼鱼。4.去年，我们开始在骏河湾内的羽藻谷海底近海底的两层，采用调查取样的方法，收集了2001-2002年的大尾类幼体。在200 ~ 600 m的深度，可以拖曳到海底以上10 ~ 50 m的水层。骏河湾的幼虫种类相对于成虫种类较少。我们连续采集了Hagoromo山谷从350 m深度到地表的层和底栖层。

The following was clarified by this study.1.As a result of experiments incubated the many macrourid eggs collected by net samplings, the embryonic development and the yolk-sac larvae of Coryphaenoides marginatus and Caelorinchus kishinouyei? were described. Both eggs were easily distinguished by melanophore patterns.2.Individual numbers of the collected macrourid larvae (depth 350 m layer to surface) attains 189. They were distinguished to six types by body proportions and melanophore patterns, furthermore identified to Coryphaenoides marginatus, Caelorinchus kishinouyei, Caelorinchus japonicus?, and Ventrifossa garmani by agreement with meristic counts or the base pairs of DNA between larvae and adults. The remaining two types were not given taxon of genus even due to lack of characters by the small size. Larvae of the former four species were described and characters as taxon of genus were summarized including the past reports. Genus Ventrifossa were firstly described.3.Juvenile of the rare fishes, Harargyreus johnsonii belonging to Moridae was collected. The juvenile was described and contributed to Ichthyological Research.4.In the last year, we begin examination-sampling methods to tow layer close to bottom of the sea in the submarine valley, Hagoromo valley, located at the inner part of Suruga Bay, to collect macrourids larvae than 2001-2002 years. It is possible to tow the layer 10 to 50 m above bottom of sea in the depth 200 to 600 m now.As problems, there is little species numbers of larvae in comparison with those of macrourid adults distributed in Suruga Bay. We has continuously collected the layer from depth 350 m to surface and ephibenthic layer of Hagoromo valley.