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首页> 外文期刊>Regulated Rivers Research & Management >DOCUMENTATION OF THE TEMPORAL AND SPATIAL PATTERNS OF PIMELODIDAE CATFISH SPAWNING AND LARVAE DISPERSION IN THE MADRE DE DIOS RIVER (PERU): INSIGHTS FOR CONSERVATION IN THE ANDEAN-AMAZON HEADWATERS
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DOCUMENTATION OF THE TEMPORAL AND SPATIAL PATTERNS OF PIMELODIDAE CATFISH SPAWNING AND LARVAE DISPERSION IN THE MADRE DE DIOS RIVER (PERU): INSIGHTS FOR CONSERVATION IN THE ANDEAN-AMAZON HEADWATERS

机译：MADRE DE DIOS RIVER（PERU）梭子蟹食性卵裂和幼虫扩散的时间和空间格局：对安第斯-亚马逊河流域保护的启示

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Catfishes (Siluriformes: Pimelodidae) in the Amazon River Basin serve important ecological and economic roles in structuring foodwebs, transferring nutrients and providing food resources for human populations. Large-scale developments such as construction of the Interoceanic Highway and associated proposed hydroelectric facilities could lead to alterations in river hydrology and aquatic ecosystems within Amazon headwater regions. We assessed temporal and spatial distribution patterns of catfish larvae to determine spawning location (highlands or lowlands) and larval drift patterns associated with rainfall events in the Andean-Amazon headwaters. We found significant differences in larval fish catch between transects with highest catches occurring in the Madre de Dios River, suggesting that the primary spawning habitats for these catfishes were in regions upstream of our sampling region within the Peruvian Andes. Highest larval catfish catches generally occurred near shore and in association with seasonal pulses in river flow. Based on our observations, we propose that this section of the Madre de Dios River is near the first identified spawning area for Pimelodidae species in the Peruvian Andes, and from this river reach larvae are transported downstream with each seasonal flood event with peak transport generally occurring in October, November and December. This research documents the important role the Madre de Dios Basin plays as spawning habitat for a key fish family in the Amazon River by serving as a corridor both for adult catfish spawning migrations and downstream larval fish transport. Given the critical role these catfishes play in structuring aquatic ecosystems in the Andean-Amazon region, their importance as a food resource for local people, and increasing threats to this riverine ecosystem associated with dam construction and channel modification, it is important to maintain and protect natural hydrologic conditions in the Madre de Dios to minimize losses of these ecosystem goods and services.
机译：亚马逊河流域的鱼（Siluriformes：Pimelodidae）在构造食物网，转移营养和为人类提供食物资源方面起着重要的生态和经济作用。诸如建设大洋际公路和拟议中的相关水电设施之类的大规模开发活动可能会导致亚马逊河上游水域的河流水文和水生生态系统发生变化。我们评估了fish鱼幼虫的时空分布格局，以确定与安第斯-亚马逊河源水区降雨事件相关的产卵位置（高地或低地）和幼虫漂移模式。我们发现，在Madre de Dios河中捕获量最高的样带之间，幼鱼的捕获量存在显着差异，这表明这些cat鱼的主要产卵栖息地在我们秘鲁安第斯山脉采样区的上游地区。幼虫最高的cat鱼捕捞量通常发生在海岸附近，并与河水流量的季节性波动有关。根据我们的观察，我们建议马德雷德迪奥斯河的这一部分靠近秘鲁安第斯山脉首个发现的Pi科物种的产卵区，并且从该河到达幼体，随着每个季节性洪水事件向下游输送，通常出现高峰运输在十月，十一月和十二月。这项研究证明了Madre de Dios盆地通过充当成年cat鱼产卵迁徙和下游幼体鱼类运输的走廊，为亚马逊河一个重要鱼类家族的产卵栖息地发挥了重要作用。鉴于这些cat鱼在安第斯-亚马逊地区构建水生生态系统中发挥的关键作用，它们作为当地人民的食物资源的重要性以及与大坝建设和河道改造相关的河流生态系统所面临的威胁不断增加，保持和保护这一点非常重要Madre de Dios的自然水文条件，以最大程度减少这些生态系统产品和服务的损失。

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    《Regulated Rivers Research & Management》 |2011年第5期|p.628-637|共10页
  • 作者

    C. M. CAÑAS; W. E. PINE III;

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    Department of Geography. University of Florida. 3141 Turlington Hall. P O. Box 117315, Gainesville, FL 32611-7315, USA;

    Department of Wildlife Ecology and Conservation, Fisheries and Aquatic Science Program, University of Florida, 110 Newins-Ziegler Hall, Gainesville, FL 32611-0430, USA;

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