n African Zoology - Investigations into a potential directed fishery for on Lake Chicamba, Mozambique

Volume 39, Issue 1
  • ISSN : 1562-7020
  • E-ISSN: 2224-073X
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This study considers the implications of directed fishing for <I>Labeo cylindricus&lt;/I&gt; on Lake Chicamba, Mozambique. <I>Labeo cylindricus&lt;/I&gt; is currently a minor by-catch of a multi-gear and multi-species, small-scale fishery and only contributes 1.2% to the annual catch of 302 tons. Experimental gill-netting revealed that cyprinids dominated the experimental catch in 25 mm and 50mm gill-nets, a scenario that could lead to the implementation of these gears in harvesting an under-exploited stock. Results from a stochastic dynamic pool model using two stockrecruitment relationships revealed that it is possible to harvest <I>L. cylindricus&lt;/I&gt; at fishing mortalities in excess of three times those currently expended, without detriment to spawner biomass. Complications arising from the potamodromous life history of <I>L. cylindricus&lt;/I&gt; were considered. It is suggested that a directed fishery for <I>L. cylindricus&lt;/I&gt; would only be feasible if directed fishing for the spawning stock could be mitigated through a closed season or by closed areas.

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