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dc.contributor.authorPlisnier, P-D.
dc.contributor.authorMgana, H.
dc.contributor.authorKimirei, I.
dc.contributor.authorChande, A.
dc.contributor.authorMakasa, L.
dc.contributor.authorChimanga, J.
dc.contributor.authorZulu, F.
dc.contributor.authorCocquyt, C.
dc.contributor.authorHorion, S.
dc.contributor.authorBergamino, N.
dc.contributor.authorNaithani, J.
dc.contributor.authorDeleersnijder, E.
dc.contributor.authorAndré, L.
dc.contributor.authorDescy , J-P.
dc.contributor.authorCornet , Y.
dc.date2009
dc.date.accessioned2016-03-15T10:03:30Z
dc.date.available2016-03-15T10:03:30Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/565
dc.descriptionThe abundance of two main pelagic fish species in Lake Tanganyika (S<i>tolothrissa tanganicae</i> and<i> </i><i>Lates stappersii</i>) has always been observed to fluctuate considerably at different time scales. The inverse correlation between the abundance of these species has often been interpreted as the consequence of predator-prey relations (avoidance behaviour by the prey). However, currently the two species often appear spatially segregated in the lake, <i>S. tanganicae</i> dominating in the north while <i>L. stappersii </i>is generally abundant in the south where it feeds mostly on shrimps. A fluctuating abundance of the species is nevertheless observed. As these fish species have a major importance for the fisheries, we investigated the limnological variability in relation to the shortterm variability of fish catches. The abundance of <i>S. tanganicae</i> was positively correlated to plankton biomass (r = 0.65), while water transparency (r = 0.56), depth of mixed layer (r = -0.70) and oxygenated water appeared important drivers for the abundance of <i>L. stappersii.</i> Alternating mixing and stable states of the epilimnion related to seasonal and internal waves variability are probably determinant for the short-term variability in abundance of <i>S. tanganicae</i> and <i>L. stappersii</i>. In the framework of this study, remote sensing has shown a potentially interesting application for fisheries research at Lake Tanganyika. We observed a close correspondence between phytoplankton blooms at the time of trade winds changes and increased catches of <i>S. tanganicae</i> in the south. The anti-correlated abundance of <i>S. tanganicae </i>and <i>L. stappersii </i>probably mainly reflects the underlying fluctuating limnological environment. Fisheries studies need to integrate limnological and planktonic monitoring to better understand large and complex ecosystems such as Lake Tanganyika.</p>
dc.languageeng
dc.publisherSpringer
dc.titleLimnological variability and pelagic fish abundance (<i>Stolothrissa tanganicae</i> and <i>Lates stappersii</i>) in Lake Tanganyika
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeSurface environments and collection management
dc.source.titleHydrobiologia
dc.source.volume625 (1)
dc.source.page117-134
Orfeo.peerreviewedYes
dc.identifier.doi10.1007/s10750-009-9701-4
dc.identifier.rmca618


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