The design of multimesh, multidepth gillnet fleets for use in the Lake Victoria Fisheries Research Project

Tweddle, D. and Ridgway, S. and Asila, A. (1999) The design of multimesh, multidepth gillnet fleets for use in the Lake Victoria Fisheries Research Project. In: Part 2: The design of multimesh, multidepth gillnet fleets for use in the Lake Victoria Fisheries Research Project. Jinja, Uganda, Lake Victoria Fisheries Research Project, pp. 1-12. (LVFRP Technical Document,6)

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Abstract

Multimesh, multidepth gillnet fleets are useful in assessing fish stock abundance, size distribution and depth distribution. Using data collected on net mesh selectivity for Nile perch, Lates niloticus (L.), in the Kenyan waters of Lake Victoria, suitable mesh sizes for gillnet fleets for use in the Lake Victoria Fisheries Research Project were determined. The modal selection length for Nile perch in the mesh sized used in the earlier experiment were determined, as was the size range vulnerable to capture. Initial trials suggest 60% of the Nile perch swim within 5 m of the bottom. Setting and hauling of the nets is simple and quick, allowing the nets to be used at the same time as other sampling programmes.

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