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Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis

Local adaptation to the littoral and pelagic zones in two cichlid haplochromine fish species from Lake Kivu was investigated using morphometrics. Cranial variation and inferred jaw mechanics in both sexes of the two species across the two habitat types were quantified and compared. Comparisons of li...

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Autores principales: Munyandamutsa, Philippe S., Jere, Wilson L., Kassam, Daud, Mtethiwa, Austin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7882941/
https://www.ncbi.nlm.nih.gov/pubmed/33613990
http://dx.doi.org/10.1002/ece3.7117
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author Munyandamutsa, Philippe S.
Jere, Wilson L.
Kassam, Daud
Mtethiwa, Austin
author_facet Munyandamutsa, Philippe S.
Jere, Wilson L.
Kassam, Daud
Mtethiwa, Austin
author_sort Munyandamutsa, Philippe S.
collection PubMed
description Local adaptation to the littoral and pelagic zones in two cichlid haplochromine fish species from Lake Kivu was investigated using morphometrics. Cranial variation and inferred jaw mechanics in both sexes of the two species across the two habitat types were quantified and compared. Comparisons of littoral versus pelagic populations revealed habitat‐specific differences in the shape of the feeding apparatus. Also, kinematic transmission of the anterior jaw four‐bar linkage that promotes greater jaw protrusion was higher in the pelagic zone than in the littoral zone for both species. Inferred bite force was likewise higher in pelagic zone fish. There were also sex‐specific differences in craniofacial morphology as males exhibited longer heads than females in both habitats. As has been described for other cichlids in the East African Great Lakes, local adaptation to trophic resources in the littoral and pelagic habitats characterizes these two Lake Kivu cichlids. Similar studies involving other types of the Lake Kivu fishes are recommended to test the evidence of the observed trophic patterns and their genetic basis of divergences.
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spelling pubmed-78829412021-02-19 Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis Munyandamutsa, Philippe S. Jere, Wilson L. Kassam, Daud Mtethiwa, Austin Ecol Evol Original Research Local adaptation to the littoral and pelagic zones in two cichlid haplochromine fish species from Lake Kivu was investigated using morphometrics. Cranial variation and inferred jaw mechanics in both sexes of the two species across the two habitat types were quantified and compared. Comparisons of littoral versus pelagic populations revealed habitat‐specific differences in the shape of the feeding apparatus. Also, kinematic transmission of the anterior jaw four‐bar linkage that promotes greater jaw protrusion was higher in the pelagic zone than in the littoral zone for both species. Inferred bite force was likewise higher in pelagic zone fish. There were also sex‐specific differences in craniofacial morphology as males exhibited longer heads than females in both habitats. As has been described for other cichlids in the East African Great Lakes, local adaptation to trophic resources in the littoral and pelagic habitats characterizes these two Lake Kivu cichlids. Similar studies involving other types of the Lake Kivu fishes are recommended to test the evidence of the observed trophic patterns and their genetic basis of divergences. John Wiley and Sons Inc. 2021-01-27 /pmc/articles/PMC7882941/ /pubmed/33613990 http://dx.doi.org/10.1002/ece3.7117 Text en © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Munyandamutsa, Philippe S.
Jere, Wilson L.
Kassam, Daud
Mtethiwa, Austin
Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis
title Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis
title_full Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis
title_fullStr Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis
title_full_unstemmed Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis
title_short Trophic divergence of Lake Kivu cichlid fishes along a pelagic versus littoral habitat axis
title_sort trophic divergence of lake kivu cichlid fishes along a pelagic versus littoral habitat axis
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7882941/
https://www.ncbi.nlm.nih.gov/pubmed/33613990
http://dx.doi.org/10.1002/ece3.7117
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