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4 results for “Astatotilapia”
Facial and body colouration is linked to social rank in the African cichlid Astatotilapia burtoni
<p>These are raw data files for our publication studying animal colouration and behaviour in an African cichlid, <em>Astatotilapia burtoni</em>. </p> <p> </p> <p>Abstract<br>Animal colouration is important for social communication within conspecifics to signal threats to competitors or fitness to possible mates. Social status and animal colouration are covarying traits that are plastic in response to dynamic environments. In the African cichlid, Astatotilapia burtoni, body colouration and behaviour have been reported to vary with social rank. However, the nature of the interaction between these two traits is poorly understood. We hypothesise that colouration patterns could be linked to the behavioural repertoires underlying social status and situated across regions of interest on the cichlid body plan. To test this hypothesis, we generated Territorial and Non-territorial males and employed computer vision tools to quantify and visualise patterns/colour enrichment associated with stereotyped Territorial/Non-Territorial male behaviour. We report colour-behaviour interactions localised in specific areas of the body and face for two colour morphs, illustrating a more nuanced view of social behaviour and colouration. Since behavioural and morphological variation are key drivers of selection in the East African Great Rift Lakes, we surmise our data may be translatable to other cichlid lineages and underline the importance of trait covariance in sexual selection and male competition.</p>
Data from: Evolutionary divergence in life history traits among populations of the Lake Malawi cichlid fish Astatotilapia calliptera
During the early stages of adaptive radiation, populations diverge in life history traits such as egg size and growth rates, in addition to eco-morphological and behavioral characteristics. However, there are few studies of life history divergence within ongoing adaptive radiations. Here, we studied Astatotilapia calliptera, a maternal mouthbrooding cichlid fish within the Lake Malawi haplochromine radiation. This species occupies a rich diversity of habitats, including the main body of Lake Malawi, as well as peripheral rivers and shallow lakes. We used common garden experiments to test for life history divergence among populations, focussing on clutch size, duration of incubation, egg mass, offspring size, and growth rates. In a first experiment, we found significant differences among populations in average clutch size and egg mass, and larger clutches were associated with smaller eggs. In a second experiment, we found significant differences among populations in brood size, duration of incubation, juvenile length when released, and growth rates. Larger broods were associated with smaller juveniles when released and shorter incubation times. Although juvenile growth rates differed between populations, these were not strongly related to initial size on release. Overall, differences in life history characters among populations were not predicted by major habitat classifications (Lake Malawi or peripheral habitats) or population genetic divergence (microsatellite-based FST). We suggest that the observed patterns are consistent with local selective forces driving the observed patterns of trait divergence. The results provide strong evidence of evolutionary divergence and covariance of life history traits among populations within a radiating cichlid species, highlighting opportunities for further work to identify the processes driving the observed divergence.
Data from: Evolutionary divergence in life history traits among populations of the Lake Malawi cichlid fish Astatotilapia calliptera
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Whole brain RNA-seq from maternal Astatotilapia burtoni
GEO Series GSE192958. Haplochromis burtoni. 44 samples. Type: Expression profiling by high throughput sequencing.
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