Global ETD Search
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Showing 1 to 8 of 8 for “"Astatotilapia"”.
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Sexual Selection and Mate Preference in Astatotilapia Burtoni
… questions, we adopted the African cichlid, <em>Astatotilapia burtoni</em>, that is indigenous to Lake Tanganyika. The cichlid's notable phenotypic diversity, particularly in male coloration and social behaviors, is believed to be a consequence of intense sexual selection and male-male …
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NUCLEAR PROGESTIN RECEPTOR REGULATES FERTILITY AND SPAWNING IN FEMALE CICHLID ASTATOTILAPIA BURTONI
… I utilize gene editing in the cichlid fish Astatotilapia burtoni to understand the effects of hormones on its well-documented spawning routine. In female cichlids, prostaglandin F2a (PGF2α) drives spawning behaviors. Sensitivity to PGF2α and expression of its receptor, ptgfr, varies across …
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Evolution and Development of Pigmentation Patterns in East African Cichlid fishes
… development in the ancestral proxy species, Astatotilapia calliptera. Although egg-spots are almost ubiquitous among haplochromines, their cellular level ontogeny remains unknown. Detailed imaging from embryonic to mature stages enabled the identification of relevant pigment cell types, and …
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A role for environmental epigenetics in the rapid diversification of East African cichlid fishes
… setting. Here, I supply generalist cichlid Astatotilapia calliptera with two alternate diets, formulated to mimic piscivorous and algivorous trophic regimes. Within one generation of this experiment, fish of each diet treatment developed novel craniofacial and body shape morphologies, …
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Transcriptional divergence during cichlid embryogenesis
… groups: the ancestral-like generalist Astatotilapia calliptera and the specialized mbuna (rock-dwelling) algae-scraper Tropheops sp. ‘mauve’. Transcriptomic data are generated and analyzed at multiple resolutions, including bulk RNA sequencing and single-cell RNA sequencing, to address …
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Colouration evo-devo: the developmental basis of intra-specific variation in cichlid pigmentation
… In a population of the generalist species Astatotilapia calliptera from the Lake Malawi/Nyasa radiation, variation in egg-spots maintains signal visibility across different depths. A Genome Wide Association Study (GWAS) identified oca2, a gene required for pigment synthesis in melanophores, …
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Genetic variation in fast-evolving East African cichlid fishes: an evolutionary perspective
Cichlid fishes from the East African Rift lakes Victoria, Tanganyika and Malawi represent a preeminent example of replicated and rapid evolutionary radiation. In this single natural system, numerous morphological (eg. jaw and tooth shape, color patterns, visual sensitivity), behavioral (eg. …
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Epigenetic variability and inheritance in East African cichlid fishes
The hundreds of cichlid species forming part of the radiation of East African Lakes show a remarkable diversity of phenotypic and ecological adaptation. Despite this, recent studies highlighted that genetic diversity within the radiation is among the lowest ever observed in vertebrates. Such a high …