Reproduction of Acanthodactylus erythrurus in Its Northern Boundary

M. A. Carretero, G. A. Llorente


Variation in the reproductive cycle of two populations of Acanthodactylus erythrurus living in coastal sandy areas of the NE extreme of its range was analyzed. This species exhibits strong influence of historical factors in its reproductive traits: vernal spermatogenic cycle, short incubation, K-selection, and high egg size variation. The populations studied are more similar to others from the Mediterranean coast than to those from Central Spain. In comparison with the latter, reproductive season is longer, adult sizes are smaller and sexual dimorphism is reduced. A second clutch can be laid when the reproductive season is long enough. Nevertheless, phenology in this species is less variable than in other Mediterranean Lacertidae. Since no evidence of suboptimal conditions was found in any population, it is concluded that factors other than reproductive ones may have restricted the range of this species in NE Spain.


reproduction; historical constraints; Lacertidae; Acanthodactylus erythrurus

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