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首页> 外文期刊>African Journal of Ecology >Escape of farmed tilapiines into the wild and entry of wild forms in fishponds, and the possible interactions between wild and farmed tilapiines from a sample of smallholder farms in Central Uganda
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Escape of farmed tilapiines into the wild and entry of wild forms in fishponds, and the possible interactions between wild and farmed tilapiines from a sample of smallholder farms in Central Uganda

机译：乌干达中部一个小农户农场的养殖罗非鱼逃逸到野生环境中，野生形式进入鱼塘，野生罗非鱼和养殖罗非鱼之间可能的相互作用

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摘要

Seven smallholder fishponds in central Uganda were studied between 2000 and 2001 to investigate the interaction of farmed tilapiines with their wild conspecifics. Emphasis was on the features that facilitate escape of fish and/or entry of fish into the farms and interactions between the farmed and the wild. These included number of species, source of seed, connection between pond and natural watercourses, purpose of the farm, destination of cultured fish and interaction between farmed and wild fish. Fishponds had no screens against entry of wild fish into the farm or escape of farmed fish into the wild and occurred within wetlands close to natural watercourses. Ponds stocked with one fish species were found to have multispecies with some individuals that were apparently intermediate morphs between the species. Fry produced within the growout fishponds was shared with other farmers within and outside the watersheds. This study showed that smallholder farms with little or no control of escape or entry of fish out and into the fishponds, and little or no management present circumstances that facilitate continued movement of tilapiines within and across watersheds in Ugandan waters. The study also indicated possible genetic interaction between farmed and their wild conspecifics through interactions within fishponds.
机译：在2000年至2001年之间，对乌干达中部的七个小农户鱼塘进行了研究，以调查养殖的罗非鱼与野生同种的相互作用。重点是促进鱼逃逸和/或鱼进入养殖场以及养​​殖场和野外之间相互作用的特征。其中包括物种数量，种子来源，池塘与天然水道之间的联系，养殖场的目的，养殖鱼的目的地以及养殖鱼与野生鱼之间的相互作用。鱼塘没有遮挡野生鱼类进入养殖场或养殖鱼类逃逸到野生环境的屏障，发生在靠近自然水道的湿地中。人们发现，放养一种鱼类的池塘具有多种物种，其中一些个体显然是物种之间的中间形态。流域内外的其他养殖者分享了在成鱼塘内生产的鱼苗。这项研究表明，对乌干达水域内流域内和跨流域的罗非鱼进行持续移动的小农场，几乎没有或没有任何控制逃逸或鱼类进入和进入鱼塘的管理，很少或没有管理。这项研究还表明，通过鱼塘内部的相互作用，养殖场及其野生同种之间可能存在遗传相互作用。

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