Critically Small Contemporaneous Effective Population Sizes Estimated for Stocks of the African Bonytongue in Western Africa

Inland capture fisheries play a critical role in supporting food security and livelihoods in Africa. Therefore, it is important to evaluate the genetic health of exploited fish populations. The African bonytongue, Heterotis niloticus, supports important commercial and subsistence fisheries in wester...

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Bibliographic Details
Published in:Fishes 2024-06, Vol.9 (6), p.196
Main Authors: Hurtado, Luis A., Mateos, Mariana, Caballero, Isabel C., Oladimeji, Tofunmi E., Adite, Alphonse, Awodiran, Michael O., Winemiller, Kirk O., Hamilton, Matthew B.
Format: Article
Language:English
Subjects:
Animal population
Commercial fishing
Datasets
Destructive fishing
effective population size
Endangered & extinct species
Estimates
Evolution
Extinction
Fish
Fish populations
Fish stocks
Fisheries
Fishing
Food security
Genotype & phenotype
Heterotis
Inbreeding
Inbreeding depression
Inland capture fisheries
Inland fisheries
Linkage disequilibrium
Livelihoods
Mathematical models
Population decline
Population genetics
Rivers
Subsistence fisheries
West Africa
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Summary:Inland capture fisheries play a critical role in supporting food security and livelihoods in Africa. Therefore, it is important to evaluate the genetic health of exploited fish populations. The African bonytongue, Heterotis niloticus, supports important commercial and subsistence fisheries in western Africa. However, sharp declines in stocks have been reported. Herein, we estimate contemporary effective population sizes (Ne) of four Heterotis populations in Nigeria, three in Benin, and five in Cameroon using Linkage Disequilibrium methods. Ne estimates were used to assess genetic short-term (i.e., inbreeding depression) and long-term (i.e., loss of evolutionary potential) risks. Ne point estimates obtained with the best estimator (out of 16), as determined by computer simulations, were
ISSN:2410-3888
2410-3888
DOI:10.3390/fishes9060196