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一、前言前颌间银鱼 Hemisalanx prognathusRegan 隶属银鱼科、间银鱼属,历来是长江口的主要经济鱼类之一,最高年产量曾达944.6吨(1960年),60年代后期以来资源显著下降,至今在长江口已不成渔汛。为探讨其资源下降原因,对早期生活史的研究至关重要,仔鱼形态特征的研究,又为研究其早期生活史的必要内容。
I. Foreword The Hemisalanx prognathusRegan is a member of the Group of Silverfish and Meriones, which has always been one of the major economic fishes in the Yangtze River estuary. The maximum annual output of Hemisalanx prognathusRegan reached 944.6 tons (1960). Since the late 1960s, the resource was significant Decline, so far in the Yangtze River estuary has not become a fishing season. In order to explore the reasons for the decline of their resources, the study of early life history is of crucial importance. The study on the morphological characteristics of larvae is also necessary for the study of their early life history.