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首页> 外文期刊>Journal of Fish Biology >Temporal and spatial patterns in ichthyoplankton assemblages in bay and open coastal environments
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Temporal and spatial patterns in ichthyoplankton assemblages in bay and open coastal environments

机译：海湾和沿海开放环境中鱼嘴浮游生物组合的时空格局

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The larval fish fauna occurring in temperate bay and shelf waters off Victoria, southern Australia, was found to be diverse, comprising taxa from 52 families. The most abundant groups collected were gobiids, tripterygiids, gobiesocids and clupeids. Fish egg concentrations were highest during spring and summer (September to February). Eggs of the Australian anchovy Engraulis australis occurred mainly during spring (September to November). Total larval fish concentrations were highest during summer (December to February), and were significantly higher at 1 km than 2 and 5 km from shore in offshore samples. Larval concentrations of a number of families, mainly reef-associated taxa that attach their eggs to hard substrata, were also higher nearer to shore. These larvae are more developed upon hatching than those of pelagic spawners and more capable of avoiding passive drift. Multivariate analyses found that larval taxonomic composition did not vary significantly with distance from shore, but that seasonal and monthly groupings were evident, with different taxa dominating at different times of the year. Larvae of the families Gobiidae and Tripterygiidae occurred in all months, but were less abundant during winter. Spatial differences in the larval fish assemblage between offshore samples and samples taken in the bay were only apparent during summer. This was primarily due to a higher abundance of seagrass-associated species, such as syngnathids and hemiramphids, utilizing specific habitats in the bay.
机译：发现在澳大利亚南部维多利亚州附近的温带海湾和陆架水域中的幼虫鱼类动物种类繁多，包括来自52个科的类群。收集到的最多的人群是戈壁鱼，雷公藤，戈比球虫和丘比特。春季和夏季（9月至2月）的鱼卵浓度最高。澳大利亚an鱼的卵主要发生在春季（9月至11月）。在夏季（12月至2月），幼鱼的总鱼浓度最高，离岸样本中离岸2公里和5公里处的幼鱼总浓度显着更高。靠近海岸的一些家庭的幼虫浓度也较高，主要是将卵附着在坚硬基质上的与珊瑚礁相关的分类单元。这些幼虫在孵化时比远洋繁殖者更发达，并且能够避免被动漂移。多变量分析发现，幼虫的分类学组成并没有随离岸距离的变化而显着变化，但是季节性和月度分组是明显的，在一年的不同时间占主导地位。 Gobiidae科和Tripterygiidae科的幼虫在所有月份出现，但在冬季则较少。仅在夏季，近海样本和从海湾采集的样本之间的幼体鱼组合空间差异才明显。这主要是由于利用海湾中特定的栖息地，与海草相关的物种（例如，白喉类和半翅类）数量更多。

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