Bergen Open Research Archive

Spatial distribution of Nile perch using acoustic methods

Bergen Open Research Archive

Show simple item record Bernardes, Ines Dias eng 2010-09-07T08:30:37Z 2010-09-07T08:30:37Z 2010-08-03 2010-08-03 en
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 eng
dc.publisher The University of Bergen en
dc.rights Copyright the author. All rights reserved eng
dc.subject Nile perch eng
dc.subject Lake Victoria eng
dc.subject Acoustics eng
dc.subject Limnological data eng
dc.title Spatial distribution of Nile perch using acoustic methods en
dc.type Master thesis eng Master i Fiskeribiologi og forvaltning en
dc.type.course FIFO eng
dc.subject.nsi VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 fiskeribiologi ernæring nob
dc.rightsHolder The author en
dc.subject.archivecode Mastergrad eng
dc.subject.nus 759906 eng
dc.type.program MAMN-FIFO

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