日本中部琵琶湖特有全浮游鲤科鱼类青背颌须鮈（Gnathopogon caerulescens，即日本胡瓜鱼）的幼鱼洄游

Juvenile migration of the exclusively pelagic cyprinid, Gnathopogon caerulescens (Honmoroko) in Lake Biwa, Central Japan.

作者信息

Kikko T, Ishizaki D, Kuwamura K, Okamoto H, Ujiie M, Ide A, Saegusa J, Kai Y, Nakayama K, Fujioka Y

机构信息

Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, Hikone, Shiga, 522-0057, Japan.

Maizuru Fisheries Research Station, Field Science Education and Research Center, Kyoto University, Nagahama, Maizuru, Kyoto, 625-0086, Japan.

出版信息

J Fish Biol. 2018 May;92(5):1590-1603. doi: 10.1111/jfb.13616. Epub 2018 Apr 6.

DOI:10.1111/jfb.13616

PMID:29624686

Abstract

Migration of wild and cultivated juvenile honmoroko Gnathopogon caerulescens of from the spawning and nursery areas in Lake Biwa were investigated, both in the Ibanaiko Lagoon and its outlet to Daido River, using beam-trawl surveys in 2013 and 2014. The study demonstrated migration of G. caerulescens from a nursery lagoon toward Lake Biwa after the juvenile stage. These findings appear to be the first direct evidence for migration of an exclusively pelagic cyprinid species from a littoral nursery to a pelagic adult habitat in a large deep lake.

摘要

2013年和2014年，利用桁拖网调查，对琵琶湖产卵和育幼区的野生和养殖蓝颌雅罗鱼幼鱼向伊巴奈湖泻湖及其通往大东河的出水口的洄游情况进行了调查。该研究表明，蓝颌雅罗鱼幼鱼阶段后会从育幼泻湖洄游至琵琶湖。这些发现似乎是首次有直接证据表明，一种完全生活在水体中的鲤科鱼类会从沿岸育幼区洄游至大型深水湖的水体成年栖息地。