Isotopic signatures induced by upwelling reveal regional fish stocks in Lake Tanganyika.

ABSTRACT: Lake Tanganyika's pelagic fish sustain the second largest inland fishery in Africa and are under pressure from heavy fishing and global warming related increases in stratification. The strength of water column stratification varies regionally, with a more stratified north and an upwelling-driven, biologically more productive south. Only little is known about whether such regional hydrodynamic regimes induce ecological or genetic differences among populations of highly mobile, pelagic fish inhabiting these different areas. Here, we examine whether the regional contrasts leave distinct isotopic imprints in the pelagic fish of Lake Tanganyika, which may reveal differences in diet or lipid content. We conducted two lake-wide campaigns during different seasons and collected physical, nutrient,

SUBMITTER: Ehrenfels B 

PROVIDER: S-EPMC10631627 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature