Fish eggs, larvae and juveniles occurring in the Shimanto estuary

的幼虫和少年的shimanto河口和邻近的碎波带的鱼类区系表现出显着的差异，沿海和近海栖息地的鳀鱼，这发生在这些栖息地的穷人到目前为止的优势种。鲻鱼（Mugil cephalus）、隆线沙蜥（Liza carinata）、刺鳍鱼（Terapon jarbua）和施氏黄颡鱼（Escheropagrus schlegeli）的存在，而鱼（Blenniidaem）、花斑鱼（Atrioticus marmoratus）和美颌鱼（Callionymidae）的缺乏，使河口岸沃茨的鱼类区系与河口中心区的鱼类区系相区别，沙滩的碎波带中有广盐性鱼类和跨河产卵鱼类，在桑迪碎波带中也采集到了部分产于四万十口沃茨水域的鱼类。在这些物种中，主要生境被认为是上述两个生境之一。例如，河口是花鲈的主要栖息地，但不是花鲈的主要栖息地。因此，本研究发现，仔稚鱼群落主要是以 ...更多信息 占据河口岸沃茨的三种鲷是一种成功适应河口低盐环境的特殊物种，在幼鱼早期从非鳗草生境迁移到河口岸沃茨的鳗草床。因此，这些鱼类被归类为非鳗草区域内的迁徙物种，它们仅在很短的时间内用作hbitat。因此，它似乎在银行沃茨的非鳗草栖息地作为这些物种的苗圃的作用是类似的冲浪区的桑迪被占领的移民物种。随后，他们居住在鳗草床至少直到后期少年或年轻的阶段。在此期间，它们转变为底栖习性，并以鳗草床中的底栖动物为食。因此，由非鳗草区和鳗草床组成的河口岸沃茨是一个重要的苗圃，适应低盐度环境的特殊物种可以在这里度过其早期生活史的很大一部分。少

The larval and juvenile ichthyofauna of the shimanto estuary and adjacent surf zones showed marked differences from that of the coastal and offshore habitats in the poorness of Engraulis japonicus, which occurs in those habitats as by far the dominant species. The presence of Mugil cephalus, Liza carinata, Terapon jarbua and Acanthopagrus schlegeli and the absence of Blenniidaem, Sebasticus marmoratus and Callionymidae distinguished the ichthyofauna of the bank waters from that in the center of estuary and surf zones of sandy beaches have something in euryhaline and diadromous fishes.Some of fish species occurring in the bank waters of the Shimanto estuary are also collected in the surf zones of sandy beaches. Among those species, the principal habitats is considered to be either of the two above-mentioned biotopes. For the Lateolabrax japonicus, for instance, the estuary is a main habitat, but not for the L.latus. Hence it is found that the community of fish larvae and juveniles mainl … More y occupying the bank waters of the estuary is an exceptional species which has successfully adapted to estuary environment characterized by a relatively low salinity condition.The three sparines move from non-eelgrass habitats to eelgrass beds in the bank waters of the estuary at the early juvenile stage. Thus those fishes are categorized as migrant species within the non-eelgrass area which they use as a hbitat only for a brief time. Consequently, it seems that the role of the non-eelgrass habitats in the bank waters as a nursery for these species is similar to that of the surf zones on sandy beaches that are occupied by migrant species. Subsequently, they reside in eelgrass beds at least until the late juvenile or young stage. During this timem, they transform to demersal habit, and feed on benthic animals in eelgrass beds. Thus the eelgrass beds seem to play an important role in their settlement.As a consequence, the bank waters of the estuary consisting of non-eelgrass areas and eelgrass beds is found to be an important nursery where the exceptional species adapted to low salinity environment can spend a great part of their early life history. Less