The ontogenetic development of egg-spots in the haplochromine cichlid fish Astatotilapia burtoni |
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| Authors: | Heule C Salzburger W |
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| Affiliation: | Zoological Institute, University of Basel, Vesalgasse 1, 4051 Basel, Switzerland. |
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| Abstract: | A series of Astatotilapia burtoni photographs were used to investigate the ontogenetic development of male egg-spots, a putative evolutionary key innovation of haplochromine cichlids. Four stages of egg-spot development were defined and all males had developed true egg-spots (stage 4) before reaching a standard length of 25 mm. Raising condition only slightly influenced the timing of the first appearance of true egg-spots. |
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| Keywords: | adaptive radiation key innovation ontogeny egg‐dummies photographic series |
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