scholarly journals Incipient sympatric speciation in Midas cichlid fish from the youngest and one of the smallest crater lakes in Nicaragua due to differential use of the benthic and limnetic habitats?

2016 ◽  
Vol 6 (15) ◽  
pp. 5342-5357 ◽  
Author(s):  
Andreas F. Kautt ◽  
Gonzalo Machado‐Schiaffino ◽  
Julian Torres‐Dowdall ◽  
Axel Meyer
Keyword(s):  
Cichlid Fish ◽  
Sympatric Speciation ◽  
Crater Lakes

scholarly journals Sympatric speciation in Nicaraguan crater lake cichlid fish

Nature ◽  
2006 ◽  
Vol 439 (7077) ◽  
pp. 719-723 ◽  
Author(s):  
Marta Barluenga ◽  
Kai N. Stölting ◽  
Walter Salzburger ◽  
Moritz Muschick ◽  
Axel Meyer
Keyword(s):  
Crater Lake ◽  
Cichlid Fish ◽  
Sympatric Speciation

scholarly journals Depth-dependent abundance of Midas Cichlid fish (Amphilophus spp.) in two Nicaraguan crater lakes

Hydrobiologia ◽  
2012 ◽  
Vol 686 (1) ◽  
pp. 277-285 ◽  
Author(s):  
Marie Theres Dittmann ◽  
Marius Roesti ◽  
Adrian Indermaur ◽  
Marco Colombo ◽  
Martin Gschwind ◽  
...  
Keyword(s):  
Cichlid Fish ◽  
Crater Lakes

scholarly journals Parallel and non-parallel changes of the gut microbiota during trophic diversification in repeated young adaptive radiations of sympatric cichlid fish

2020 ◽  
Author(s):  
Andreas Härer ◽  
Julián Torres-Dowdall ◽  
Sina J. Rometsch ◽  
Elizabeth Yohannes ◽  
Gonzalo Machado-Schiaffino ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Microbial Communities ◽  
Trophic Ecology ◽  
Cichlid Fish ◽  
Conclusive Evidence ◽  
Rrna Gene ◽  
Crater Lakes ◽  
Ecological Diversification ◽  
Early Stages ◽  
Adaptive Radiations

Abstract Background: Recent increases in understanding the ecological and evolutionary roles of microbial communities has underscored the importance for their hosts’ biology. Yet, little is known about gut microbiota dynamics during early stages of ecological diversification and speciation. We sequenced the V4 region of the 16s rRNA gene to study the gut microbiota of Nicaraguan Midas cichlid fish (Amphilophus cf. citrinellus). Specifically, we tested the hypothesis that parallel divergence in trophic ecology in extremely young adaptive radiations from two crater lakes is associated with parallel changes of their gut microbiota. Results: Bacterial communities of fish guts and lake water were highly distinct, indicating that the gut microbiota is shaped by host-specific factors. Among individuals of the same crater lake, differentiation in trophic ecology was weakly associated with gut microbiota differentiation, suggesting that diet, to some extent, affects the gut microbiota. However, differences in trophic ecology were much more pronounced across than within species whereas similar patterns were not observed for taxonomic and functional differences of the gut microbiota. Across the two crater lakes, we could not detect conclusive evidence for parallel changes of the gut microbiota associated with trophic ecology. Conclusions: A lack of clearly differentiated niches during early stages of ecological diversification might result in non-parallel changes of gut microbial communities, as observed in our study system as well as in other recently diverged fish species.

scholarly journals Parallel and non-parallel changes of the gut microbiota during trophic diversification in repeated young adaptive radiations of sympatric cichlid fish

2020 ◽  
Author(s):  
Andreas Härer ◽  
Julián Torres-Dowdall ◽  
Sina J. Rometsch ◽  
Elizabeth Yohannes ◽  
Gonzalo Machado-Schiaffino ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Microbial Communities ◽  
Trophic Ecology ◽  
Cichlid Fish ◽  
Conclusive Evidence ◽  
Rrna Gene ◽  
Crater Lakes ◽  
Ecological Diversification ◽  
Early Stages ◽  
Adaptive Radiations

Abstract Background: Recent increases in understanding the ecological and evolutionary roles of microbial communities has underscored the importance for their hosts’ biology. Yet, little is known about gut microbiota dynamics during early stages of ecological diversification and speciation. We sequenced the V4 region of the 16s rRNA gene to study the gut microbiota of Nicaraguan Midas cichlid fish ( Amphilophus cf. citrinellus ). Specifically, we tested the hypothesis that parallel divergence in trophic ecology in extremely young adaptive radiations from two crater lakes is associated with parallel changes of their gut microbiota.Results: Bacterial communities of fish guts and lake water were highly distinct, indicating that the gut microbiota is shaped by host-specific factors. Among individuals of the same crater lake, differentiation in trophic ecology was weakly associated with gut microbiota differentiation, suggesting that diet, to some extent, affects the gut microbiota. However, differences in trophic ecology were much more pronounced across than within species whereas similar patterns were not observed for taxonomic and functional differences of the gut microbiota. Across the two crater lakes, we could not detect conclusive evidence for parallel changes of the gut microbiota associated with trophic ecology.Conclusions: A lack of clearly differentiated niches during early stages of ecological diversification might result in non-parallel changes of gut microbial communities, as observed in our study system as well as in other recently diverged fish species.

scholarly journals Parallel and non-parallel changes of the gut microbiota during trophic diversification in repeated young adaptive radiations of sympatric cichlid fish

2019 ◽  
Author(s):  
Andreas Härer ◽  
Julián Torres-Dowdall ◽  
Sina Rometsch ◽  
Elizabeth Yohannes ◽  
Gonzalo Machado-Schiaffino ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Trophic Ecology ◽  
Crater Lake ◽  
Parallel Evolution ◽  
Cichlid Fish ◽  
Crater Lakes ◽  
Functional Changes ◽  
Ecological Diversification ◽  
Early Stages ◽  
Adaptive Radiations

AbstractRecent increases in understanding the ecological and evolutionary roles of microbial communities has underscored their importance for their hosts’ biology. Yet, little is known about gut microbiota dynamics during early stages of ecological diversification and speciation. We studied the gut microbiota of extremely young adaptive radiations of Nicaraguan crater lake cichlid fish (Amphilophus cf. citrinellus) to test the hypothesis that parallel evolution in trophic ecology is associated with parallel changes of the gut microbiota. Bacterial communities of the water (eDNA) and guts were highly distinct, indicating that the gut microbiota is shaped by host-specific factors. Across individuals of the same crater lake, differentiation in trophic ecology was associated with gut microbiota differentiation, suggesting that diet affects the gut microbiota. However, differences in trophic ecology were much more pronounced across than within species whereas little evidence was found for similar patterns in taxonomic and functional changes of the gut microbiota. Across the two crater lakes, we could not detect evidence for parallel changes of the gut microbiota associated with trophic ecology. Similar cases of non-parallelism have been observed in other recently diverged fish species and might be explained by a lack of clearly differentiated niches during early stages of ecological diversification.

scholarly journals Parallel evolution in Ugandan crater lakes: repeated evolution of limnetic body shapes in haplochromine cichlid fish

2015 ◽  
Vol 15 (1) ◽  
pp. 9 ◽  
Author(s):  
Gonzalo Machado-Schiaffino ◽  
Andreas F Kautt ◽  
Henrik Kusche ◽  
Axel Meyer
Keyword(s):  
Parallel Evolution ◽  
Cichlid Fish ◽  
Crater Lakes ◽  
Haplochromine Cichlid ◽  
Repeated Evolution ◽  
Body Shapes

scholarly journals Parallel and non-parallel changes of the gut microbiota during trophic diversification in repeated young adaptive radiations of sympatric cichlid fish

2020 ◽  
Author(s):  
Andreas Härer ◽  
Julián Torres-Dowdall ◽  
Sina J. Rometsch ◽  
Elizabeth Yohannes ◽  
Gonzalo Machado-Schiaffino ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Microbial Communities ◽  
Trophic Ecology ◽  
Cichlid Fish ◽  
Conclusive Evidence ◽  
Rrna Gene ◽  
Crater Lakes ◽  
Ecological Diversification ◽  
Early Stages ◽  
Adaptive Radiations

Abstract Background: Recent increases in understanding the ecological and evolutionary roles of microbial communities has underscored the importance for their hosts’ biology. Yet, little is known about gut microbiota dynamics during early stages of ecological diversification and speciation. We sequenced the V4 region of the 16s rRNA gene to study the gut microbiota of Nicaraguan Midas cichlid fish ( Amphilophus cf. citrinellus ). Specifically, we tested the hypothesis that parallel divergence in trophic ecology in extremely young adaptive radiations from two crater lakes is associated with parallel changes of their gut microbiota. Results: Bacterial communities of fish guts and lake water were highly distinct, indicating that the gut microbiota is shaped by host-specific factors. Among individuals of the same crater lake, differentiation in trophic ecology was weakly associated with gut microbiota differentiation, suggesting that diet, to some extent, affects the gut microbiota. However, differences in trophic ecology were much more pronounced across than within species whereas similar patterns were not observed for taxonomic and functional differences of the gut microbiota. Across the two crater lakes, we could not detect conclusive evidence for parallel changes of the gut microbiota associated with trophic ecology. Conclusions: A lack of clearly differentiated niches during early stages of ecological diversification might result in non-parallel changes of gut microbial communities, as observed in our study system as well as in other recently diverged fish species.

scholarly journals Local variation and parallel evolution: morphological and genetic diversity across a species complex of neotropical crater lake cichlid fishes

2010 ◽  
Vol 365 (1547) ◽  
pp. 1763-1782 ◽  
Author(s):  
Kathryn R. Elmer ◽  
Henrik Kusche ◽  
Topi K. Lehtonen ◽  
Axel Meyer
Keyword(s):  
Genetic Diversity ◽  
Species Complex ◽  
Body Shape ◽  
Crater Lake ◽  
Shape Change ◽  
Parallel Evolution ◽  
Cichlid Fish ◽  
Shape Variation ◽  
Body Depth ◽  
Crater Lakes

The polychromatic and trophically polymorphic Midas cichlid fish species complex ( Amphilophus cf. citrinellus ) is an excellent model system for studying the mechanisms of speciation and patterns of phenotypic diversification in allopatry and in sympatry. Here, we first review research to date on the species complex and the geological history of its habitat. We analyse body shape variation from all currently described species in the complex, sampled from six crater lakes (maximally 1.2–23.9 kyr old) and both great lakes in Nicaragua. We find that Midas cichlid populations in each lake have their own characteristic body shape. In lakes with multiple sympatric species of Midas cichlid, each species has a distinct body shape. Across the species complex, most body shape change relates to body depth, head, snout and mouth shape and caudal peduncle length. There is independent parallel evolution of an elongate limnetic species in at least two crater lakes. Mitochondrial genetic diversity is higher in crater lakes with multiple species. Midas cichlid species richness increases with the size and age of the crater lakes, though no such relationship exists for the other syntopic fishes. We suggest that crater lake Midas cichlids follow the predicted pattern of an adaptive radiation, with early divergence of each crater lake colonization, followed by intralacustrine diversification and speciation by ecological adaptation and sexual selection.

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