Dealing with food and eggs in mouthbrooding cichlids: structural and functional trade-offs in fitness related traits.

PloS One
Tim TkintD Adriaens

Abstract

As in any vertebrate, heads of fishes are densely packed with functions. These functions often impose conflicting mechanical demands resulting in trade-offs in the species-specific phenotype. When phenotypical traits are linked to gender-specific parental behavior, we expect sexual differences in these trade-offs. This study aims to use mouthbrooding cichlids as an example to test hypotheses on evolutionary trade-offs between intricately linked traits that affect different aspects of fitness. We focused on the oral apparatus, which is not only equipped with features used to feed and breathe, but is also used for the incubation of eggs. We used this approach to study mouthbrooding as part of an integrated functional system with diverging performance requirements and to explore gender-specific selective environments within a species. Because cichlids are morphologically very diverse, we hypothesize that the implications of the added constraint of mouthbrooding will primarily depend on the dominant mode of feeding of the studied species. To test this, we compared the trade-off for two maternal mouthbrooding cichlid species: a "suction feeder" (Haplochromis piceatus) and a "biter" (H. fischeri). The comparison of morphology and per...Continue Reading

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Citations

Aug 1, 2015·Journal of the Royal Society, Interface·Sam Van WassenberghDominique Adriaens
Oct 24, 2019·Proceedings. Biological Sciences·O M Selz, O Seehausen
Aug 23, 2019·Proceedings. Biological Sciences·Fabrizia RoncoWalter Salzburger
Jan 9, 2021·Journal of Anatomy·Javier H Santos-SantosDominique Adriaens
Feb 23, 2021·Ecology and Evolution·Philippe S MunyandamutsaAustin Mtethiwa

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Methods Mentioned

BETA
dissection
dissections
PCA

Software Mentioned

Excel®
MorphoJ
analySIS®
TPSDIG
TPSSMALL

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