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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >Large-Scale Spatial and Temporal Variability of Larval Fish Assemblages in the Tropical Atlantic Ocean
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Large-Scale Spatial and Temporal Variability of Larval Fish Assemblages in the Tropical Atlantic Ocean

机译：热带大西洋幼虫鱼组合的大规模时空变异

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This study investigated the large-scale spatial and temporal variability of larval fish assemblages in the west tropical Atlantic Ocean. The sampling was performed during four expeditions. Identification resulted in 100 taxa (64 families, 19 orders and 17 suborders). During the four periods, 80% of the total larvae taken represented eight characteristics families (Scombridae, Carangidae, Paralepididae, Bothidae, Gonostomatidae, Scaridae, Gobiidae and Myctophidae). Fish larvae showed a rather heterogeneous distribution with density at each station ranging from 0.5 to 2000 larvae per 100m 3 . A general trend was observed, lower densities at oceanic area and higher densities in the seamounts and islands. A gradient in temperature, salinity, phytoplankton biomass, zooplankton biomass and station depth was strongly correlated with changes in ichthyoplankton structure. Myctophidae, and Paralepididae presented increased abundance at high salinities and temperatures. Bothidae and Gobiidae were more abundant at higher phytoplankton biomass and zooplankton biomass. Scaridae, Scombridae and Gonostomatidae had higher abundances at deep offshore stations. Different events might be responsible for the formation, maintenance and breakdown of fish larvae assemblage in the tropical oceanic area of Brazil. The results suggested that the oceanographic variables (temperature, salinity, phytoplankton biomass, zooplankton biomass and station depth) played an important role on the distribution patterns of ichthyoplankton.
机译：这项研究调查了西部热带大西洋上幼体鱼群的大规模时空变异。在四次考察中进行了采样。鉴定产生了100个分类单元（64个家庭，19个订单和17个子订单）。在这四个时期中，幼虫总数的80％代表8个特征科（（科、,科，Para科、,科，线虫科，甲虫科，戈壁科和Myctophidae）。鱼幼虫表现出相当不均匀的分布，每个站点的密度为每100m 3 0.5至2000幼虫。观察到总体趋势，海洋区域的密度较低，而海山和岛屿的密度较高。温度，盐度，浮游生物量，浮游生物量和站位深度的梯度与鱼鳞浮游生物结构的变化密切相关。在高盐度和高温下，Myctophidae和Paralepididae的丰度增加。浮游植物生物量和浮游动物生物量较高时，科和虾科都更丰富。在深海站，甲虫，com科和线虫科的丰度较高。巴西热带海洋地区鱼幼体组合的形成，维持和破坏可能是不同的事件。结果表明，海洋学变量（温度，盐度，浮游植物生物量，浮游动物生物量和站位深度）在鱼鳞浮游生物的分布模式中起着重要作用。

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