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Spatial distribution of Nile perch using acoustic methods

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dc.contributor.author Bernardes, Ines Dias
dc.date.accessioned 2010-09-07T08:30:37Z
dc.date.available 2010-09-07T08:30:37Z
dc.date.issued 2010-08-03
dc.date.submitted 2010-08-03 en
dc.identifier.uri http://hdl.handle.net/1956/4094
dc.description.abstract Lake Victoria supports Africa's largest fishery, being Nile perch the main contributor for the fishery revenues. Alerts for decreases in the commercial catches of Nile perch were reported during the mid 1990s. According to Kolding et al. (2008b), fish stocks are being affected mainly by eutrophication processes. The purpose of this work is to study if there is a relation between Nile perch spatial distribution and limnological data, in order to estimate the effects of enhanced eutrophication in the stock distribution. Acoustic data was used to obtain information on the Nile perch spatial distribution in association with limnological data (oxygen, chlorophyll a and temperature). Study limitations did not allow to conclude on relations between Nile perch densities and limnological data. However the results show a relation between Nile perch size and oxygen, and between Nile perch size and chlorophyll (for the three strata combined, as for the deep and inshore strata). Temperature showed to have no relation with fish size. en
dc.format.extent 10434906 bytes en
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher The University of Bergen en
dc.rights Copyright the author. All rights reserved en
dc.subject Nile perch en
dc.subject Lake Victoria en
dc.subject Acoustics en
dc.subject Limnological data en
dc.title Spatial distribution of Nile perch using acoustic methods en
dc.type Master thesis
dc.type.degree Master i Fiskeribiologi og forvaltning en
dc.type.course FIFO en
dc.subject.nsi VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 fiskeribiologi ernæring en
dc.rightsHolder The author en
dc.subject.archivecode Mastergrad
dc.subject.nus 759906
dc.type.program MAMN-FIFO


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