alexa Shift of Small Scale Fishing Impacts on Fish Trophic Levels in Lake Iro Revealed by Species-Based Indicators
ISSN: 2150-3508

Fisheries and Aquaculture Journal
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Research Article

Shift of Small Scale Fishing Impacts on Fish Trophic Levels in Lake Iro Revealed by Species-Based Indicators

Modou Thiaw1*, Mbaye Tine2,3, Hamet Diaw Diadhiou1, Oualbadet Magoma4 and Patrice Brehmer5

1Institut Sénégalais de Recherches agricoles (ISRA), Centre de Recherches Océanographiques de Dakar-Thiaroye, BP 2241, Dakar, Sénégal

2The Molecular Zoology Laboratory, University of Johannesburg, Kingsway Campus, Auckland Park 2006, South Africa

3Genome Centre Cologne at MPI for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829 Cologne, Germany

4Directorate of Fisheries and Aquaculture (DPA), N’Djamena, Chad

5Institut of Research for Development (IRD), UMR195 Lemar, ISRA-CRODT, BP 1386, Dakar, Senegal

*Corresponding Author:
Modou Thiaw
ISRA/Oceanographic Research Centre of Dakar-Thiaroye BP 2241, Dakar, Senegal
E-mail: [email protected]

Received date: March 05, 2016; Accepted date: April 15, 2016; Published date: April 22, 2016

Citation: Thiaw M, Tine M, Diadhiou HD, Magoma O, Brehmer P (2016) Shift of Small Scale Fishing Impacts on Fish Trophic Levels in Lake Iro Revealed by Species-based Indicators. Fish Aquac J 7:167. doi:10.4172/2150-3508.1000167

Copyright: © 2016 Thiaw M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



A fisheries management plan was required in Central Africa, which integrated a reduced regional hydrographical network and limited amounts of data in the overall regime. The current data and knowledge on fish populations and fisheries impacts are very poor in this region, particularly in Chad. Therefore, any new knowledge, especially on the structure of the ichthyological stands can be considered as valuable. Information on the status of Lake Iro fisheries resources was thus established by this study, which can serve as a model fisheries management regime in Central Africa. We performed assessment of fish resources in Lake Iro, Chad, achieved by a characterization of the exploited ichthyofauna, and the location of nursery and fishing areas. Results indicated that the overall size range of fish species showed negative effects of fishing pressure on size structure of the fish resources. Fishing has increasingly exerted pressure on fish species and affected the primary consumer species. We hypothesized at Lake Iro fish catches were below optimal fish production levels, essentially due to excessive localized fishing efforts, and selective fishing techniques by fisherman. Such reports call for the development of an integrated plan for sustainable management of Lake Iro fisheries resources. Sustainable and equitable exploitation of Lake Iro resources can be promoted by implementation of the following recommendation: a protected area at the lake inlet to limit excessive juvenile fish catches, which disturbs the aquatic food chain and prevents juvenile fish supply and growth in Lake Iro.


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