Cargando…
Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids
Tooth shape is used to differentiate between morphologically similar species of vertebrates, including fish. This study aimed to quantify tooth shape of three sympatric species: Haplochromis kamiranzovu, H. insidiae, and H. astatodon endemic to Lake Kivu, whose existing identification criteria are c...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319136/ https://www.ncbi.nlm.nih.gov/pubmed/32607184 http://dx.doi.org/10.1002/ece3.6309 |
_version_ | 1783550994674614272 |
---|---|
author | Munyandamutsa, Philippe Jere, Wilson Lazaro Kassam, Daud Mtethiwa, Austin |
author_facet | Munyandamutsa, Philippe Jere, Wilson Lazaro Kassam, Daud Mtethiwa, Austin |
author_sort | Munyandamutsa, Philippe |
collection | PubMed |
description | Tooth shape is used to differentiate between morphologically similar species of vertebrates, including fish. This study aimed to quantify tooth shape of three sympatric species: Haplochromis kamiranzovu, H. insidiae, and H. astatodon endemic to Lake Kivu, whose existing identification criteria are currently only qualitative. A quantitative tooth shape analysis was performed based on digitized tooth outline data with a subsequent elliptic Fourier analysis to test for differences among the three species. We looked at crown shape and size differences within H. kamiranzovu and H. insidiae at geographical, habitat, and gender levels. No comparison at habitat level was done for H. astatodon because it is found only in littoral zone. The analysis revealed significant tooth shape differences among the three species. Haplochromis astatodon had a significantly longer major cusp height and a longer and larger minor cusp than that of H. insidiae. It had also a longer major cusp height and a longer and larger minor cusp than that of H. kamiranzovu. Tooth shape differences of H. kamiranzovu and H. insidiae species were not significantly different between littoral and pelagic fish (p > .05) while differences were significant between southern and northern Lake Kivu populations (p < .05). Tooth sizes in H. kamiranzovu and H. insidiae were significantly different, both in height and width as well as in their ratios, and this was true at sex and geographic levels (p < .05), but not at habitat level (p > .05). Tooth shape was also significantly different with sharp teeth for males compared with females of southern populations versus northern ones. These shape‐ and size‐related differences between sexes suggest differences in the foraging strategies toward available food resources in the lake habitat. Further research should explain the genetic basis of the observed pattern. |
format | Online Article Text |
id | pubmed-7319136 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-73191362020-06-29 Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids Munyandamutsa, Philippe Jere, Wilson Lazaro Kassam, Daud Mtethiwa, Austin Ecol Evol Original Research Tooth shape is used to differentiate between morphologically similar species of vertebrates, including fish. This study aimed to quantify tooth shape of three sympatric species: Haplochromis kamiranzovu, H. insidiae, and H. astatodon endemic to Lake Kivu, whose existing identification criteria are currently only qualitative. A quantitative tooth shape analysis was performed based on digitized tooth outline data with a subsequent elliptic Fourier analysis to test for differences among the three species. We looked at crown shape and size differences within H. kamiranzovu and H. insidiae at geographical, habitat, and gender levels. No comparison at habitat level was done for H. astatodon because it is found only in littoral zone. The analysis revealed significant tooth shape differences among the three species. Haplochromis astatodon had a significantly longer major cusp height and a longer and larger minor cusp than that of H. insidiae. It had also a longer major cusp height and a longer and larger minor cusp than that of H. kamiranzovu. Tooth shape differences of H. kamiranzovu and H. insidiae species were not significantly different between littoral and pelagic fish (p > .05) while differences were significant between southern and northern Lake Kivu populations (p < .05). Tooth sizes in H. kamiranzovu and H. insidiae were significantly different, both in height and width as well as in their ratios, and this was true at sex and geographic levels (p < .05), but not at habitat level (p > .05). Tooth shape was also significantly different with sharp teeth for males compared with females of southern populations versus northern ones. These shape‐ and size‐related differences between sexes suggest differences in the foraging strategies toward available food resources in the lake habitat. Further research should explain the genetic basis of the observed pattern. John Wiley and Sons Inc. 2020-05-14 /pmc/articles/PMC7319136/ /pubmed/32607184 http://dx.doi.org/10.1002/ece3.6309 Text en © 2020 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 Jere, Wilson Lazaro Kassam, Daud Mtethiwa, Austin Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids |
title | Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids |
title_full | Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids |
title_fullStr | Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids |
title_full_unstemmed | Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids |
title_short | Species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in Lake Kivu cichlids |
title_sort | species specificity and sexual dimorphism in tooth shape among the three sympatric haplochromine species in lake kivu cichlids |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319136/ https://www.ncbi.nlm.nih.gov/pubmed/32607184 http://dx.doi.org/10.1002/ece3.6309 |
work_keys_str_mv | AT munyandamutsaphilippe speciesspecificityandsexualdimorphismintoothshapeamongthethreesympatrichaplochrominespeciesinlakekivucichlids AT jerewilsonlazaro speciesspecificityandsexualdimorphismintoothshapeamongthethreesympatrichaplochrominespeciesinlakekivucichlids AT kassamdaud speciesspecificityandsexualdimorphismintoothshapeamongthethreesympatrichaplochrominespeciesinlakekivucichlids AT mtethiwaaustin speciesspecificityandsexualdimorphismintoothshapeamongthethreesympatrichaplochrominespeciesinlakekivucichlids |