Paradoxical reproduction and body size in the rock lizard,Agama atra atra, in Namaqualand, South Africa

Autor:	P. le F.N. Mouton, Yolande M. Herselman
Rok vydání:	1994
Předmět:	education.field_of_study Ecology Lizard media_common.quotation_subject Population Body size Biology biology.organism_classification Cape biology.animal Agama atra Animal Science and Zoology Vitellogenesis Reproduction education media_common
Zdroj:	South African Journal of Zoology. 29:199-203
ISSN:	0254-1858
DOI:	10.1080/02541858.1994.11448348
Popis:	The rock lizard Agama atra atra from Namaqualand differs in both body size and reproduction from other populations of this species occurring elsewhere in southern Africa. Both sexes from Namaqualand are significantly larger than their counterparts in the south-western Cape. While reproduction in this species is strongly seasonal elsewhere, it is apparently continuous in Namaqualand. Females with vitellogenic ovarian follicles and/or oviducal eggs were collected during the winter months, a time when females are typically reproductively quiescent in other populations. Aseasonal reproduction and large body size of this species in Namaqualand do not correlate with prevailing environmental conditions in the area. The presence of at least one other species with continuous reproduction and two others with tropical affinities in the same general area, suggests that the Namaqualand population of A. a. alra may be a tropical relict.
Databáze:	OpenAIRE
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