{"refrec":{"BRefID":132044,"RR":"<b>Plisnier, P-D.; Mgana, H.; Kimirei, I.; Chande, A.; Makasa, L.; Chimanga, J.; Zulu, F.; Cocquyt, C.; Horion, S.; Bergamino, N.; Naithani, J.; Deleersnijder, E.; André, L.; Descy, J.-P.; Cornet, Y.</b> (2009). Limnological variability and pelagic fish abundance (<i>Stolothrissa tanganicae</i> and <i>Lates stappersii</i>) in Lake Tanganyika. <i>Hydrobiologia 625(1)</i>: 117-134. <a href=\"http://dx.doi.org/10.1007/s10750-009-9701-4\" target=\"_blank\">dx.doi.org/10.1007/s10750-009-9701-4</a>","BEntID":126062,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Hydrobiologia 625(1)</i>: 117-134. <a href=\"https://dx.doi.org/10.1007/s10750-009-9701-4\" target=\"_blank\">https://dx.doi.org/10.1007/s10750-009-9701-4</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Plisnier, P-D.; Mgana, H.; Kimirei, I.; Chande, A.; Makasa, L.; Chimanga, J.; Zulu, F.; Cocquyt, C.; Horion, S.; Bergamino, N.; Naithani, J.; Deleersnijder, E.; André, L.; Descy, J.-P.; Cornet, Y.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Plisnier, P-D. <i>et al.</i>","Englishabstract":"The abundance of two main pelagic fish species in Lake Tanganyika (<i>Stolothrissa tanganicae</i> and <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 short-term variability of fish catches. The abundance of S<i>. 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. 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