Adaptive shell-morphological differences ...
Document type :
Compte-rendu et recension critique d'ouvrage
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Title :
Adaptive shell-morphological differences and differential fitness in two morphospecies of Lanistes (Gastropoda: Ampullariidae) from the northern region of the Malawi Basin
Author(s) :
Van Bocxlaer, Bert [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Dollion, Alexis [Auteur]
Ethologie animale et humaine [EthoS]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Ortiz‐sepulveda, Claudia [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Calarnou, Christophe [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Habert, Remi [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Pawindo, Grant [Auteur]
University of Malawi
Vekemans, Xavier [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Dollion, Alexis [Auteur]
Ethologie animale et humaine [EthoS]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Ortiz‐sepulveda, Claudia [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Calarnou, Christophe [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Habert, Remi [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Pawindo, Grant [Auteur]
University of Malawi
Vekemans, Xavier [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Journal title :
Evolutionary Journal of the Linnean Society
Pages :
kzae010
Publisher :
Oxford Academic
Publication date :
2024
ISSN :
2752-938X
English keyword(s) :
ongoing adaptive radiation
geometric morphometrics
common garden experiment
Lanistes
East African Rift System
Lake Malawi
fitness
geometric morphometrics
common garden experiment
Lanistes
East African Rift System
Lake Malawi
fitness
HAL domain(s) :
Sciences cognitives
English abstract : [en]
Environment–phenotype correlations are a central pattern of adaptive radiations, but such correlations and the expected associated reciprocal differences in fitness of divergent phenotypes in their respective niches are ...
Show more >Environment–phenotype correlations are a central pattern of adaptive radiations, but such correlations and the expected associated reciprocal differences in fitness of divergent phenotypes in their respective niches are rarely demonstrated. Ecophenotypic plasticity may result in environment–phenotype correlations too, however, so that certain observed morphological differences, even in adaptive radiations, may result from plasticity instead of differential adaptation. Here, we examine the nature of observed morphological differences in two morphospecies of Lanistes gastropods from the northern region of the Malawi Basin that are part of an ongoing adaptive radiation. We subjected experimental populations of each of these two morphospecies, i.e. L. sp. (solidus-like), which occupies intralacustrine habitats with comparatively stable environmental conditions, and L. sp. (ovum-like), which occurs in satellite waterbodies with fluctuating environmental conditions, to a common garden experiment in the laboratory. Our experimental conditions approximated those of stable, intralacustrine habitats. We monitored fecundity and subjected wild-caught parents and intraspecific F1 offspring to semilandmark geometric morphometrics. L. sp. (solidus-like) exhibited higher fecundity than L. sp. (ovum-like). Whereas wild-caught parents of both morphospecies had similar shell sizes, 9-month-old F1 offspring of L. sp. (solidus-like) were significantly smaller than those of L. sp. (ovum-like), indicating slower growth. Substantial shell-morphological differences were observed between the two morphospecies in the wild-caught parents as well as in F1 offspring, indicating that shell-morphological differences are genetically inherited. Our results also indicate differential fitness but fully reciprocal transplant experiments would be required to demonstrate local adaptation.Show less >
Show more >Environment–phenotype correlations are a central pattern of adaptive radiations, but such correlations and the expected associated reciprocal differences in fitness of divergent phenotypes in their respective niches are rarely demonstrated. Ecophenotypic plasticity may result in environment–phenotype correlations too, however, so that certain observed morphological differences, even in adaptive radiations, may result from plasticity instead of differential adaptation. Here, we examine the nature of observed morphological differences in two morphospecies of Lanistes gastropods from the northern region of the Malawi Basin that are part of an ongoing adaptive radiation. We subjected experimental populations of each of these two morphospecies, i.e. L. sp. (solidus-like), which occupies intralacustrine habitats with comparatively stable environmental conditions, and L. sp. (ovum-like), which occurs in satellite waterbodies with fluctuating environmental conditions, to a common garden experiment in the laboratory. Our experimental conditions approximated those of stable, intralacustrine habitats. We monitored fecundity and subjected wild-caught parents and intraspecific F1 offspring to semilandmark geometric morphometrics. L. sp. (solidus-like) exhibited higher fecundity than L. sp. (ovum-like). Whereas wild-caught parents of both morphospecies had similar shell sizes, 9-month-old F1 offspring of L. sp. (solidus-like) were significantly smaller than those of L. sp. (ovum-like), indicating slower growth. Substantial shell-morphological differences were observed between the two morphospecies in the wild-caught parents as well as in F1 offspring, indicating that shell-morphological differences are genetically inherited. Our results also indicate differential fitness but fully reciprocal transplant experiments would be required to demonstrate local adaptation.Show less >
Language :
Anglais
Popular science :
Non
ANR Project :
Source :
Submission date :
2024-09-17T02:28:54Z
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