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Assessing the Potential Presence and Impact of Nile tilapia, Oreochromis niloticus (Pisces: Cichlidae;Linnaeus 1758) in Mutukutuku Reservoir in solwezi, Zambia

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Journal of Food Science and Engineering 2019年第9期9卷 385-395页

作者： Arthertone Jere Lackson Chama Siachoono Stanford Ministry of Fisheries and Livestock Department of FisheriesExtension ServicesSolwezi 110118Zambia Department Zoology and Aquatic Science School of Natural ResourcesThe Copperbelt UniversityKitwe 21692Zambia

Invasive alien species are one of the greatest threats to biodiversity and ecosystem globally,affecting delivery of ecosystem goods and services,and consequently human *** niloticus is one of the most highly successful invaders of aquatic ecosystems with competitive characteristic advantages over indigenous *** aim of this study was to investigate the potential presence and impact of *** on Mitukutuku *** study was undertaken using fisheries independent surveys for the period of 2 *** identification key and gel electrophoresis identification methods were also used to confirm presence of *** and also possible hybridization with indigenous congeneric *** dependent survey was conducted with fishers and traders to further assess presence of the invasive species and its impacts on their catches and socio-economic well-being.A total of 32 Oreochromis hybrids species and 19 of *** were found in the *** confirmed a higher proportion of *** in the *** from interviews of fishers and traders revealed catch per unit effort of *** and *** to be higher compared to that of indigenous congeneric ***,fish traders confirmed that income for the fish sales increased from 5%in March to 7%in ***,these results suggested that *** does not only exist in Mitukutuku reservoir,but also hybridizes with native species and dominates the entire stretch of the reservoir threatening loss of biodiversity and aquaculture breeding *** is need for restricting culture of *** in Zambia.

关键词： Aestivate congeneric species invasive impact Mitukutuku reservoir solwezi Zambia

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