SciELO - Scientific Electronic Library Online

vol.20 número3Experimentos en autoorganizaciónAnillina de Centroamérica I: Geocharidius integripennis (Bates, 1882) (Coleoptera, Carabidae) índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados

  • No hay artículos similaresSimilares en SciELO


Acta zoológica mexicana

versión On-line ISSN 2448-8445versión impresa ISSN 0065-1737


GADSDEN, Héctor; MENDEZ-DE LA CRUZ, Fausto R.  y  GIL-MARTINEZ, Rosalina. Ciclo reproductor de Uta stejnegeri Schmidt 1921 (Sauria: Phrynosomatidae) en dunas del Bolsón de Mapimí, Durango, México. Acta Zool. Mex [online]. 2004, vol.20, n.3, pp.127-138. ISSN 2448-8445.

The reproductive cycle of the lizard Uta stejnegeri Schmidt 1921 (previously Uta stansburiana stejnegeri Schmidt 1921) was determined using data obtained from field caught individuals at the Biosphere Reserve of Mapimí, Durango, México. During 1990 monthly samples of this species were collected from sand dunes. Males reached sexual maturity at 45.0 mm snouth-vent length (SVL); females reached sexual maturity at 40.0 mm SVL. The reproductive cycles of both sexes were synchronous. Significant variation in testes mass was determinated by ANCOVA and males reached maximal testes mass between December-February; testes began to decrease in July, reaching minimum mass in September. The monthly percentage of non-vitellogenic follicles, vitellogenic follicles and oviductal eggs was recorded for females. Enlarged vitellogenic follicles first appeared during mid-January in females. These showed bimodal presence of eggs in oviducts between February and May and in July. Mean clutch size based on oviductal eggs counts was 2.8 ± 1.1. Clutch size was positively correlated with female body size. Most of the annual rainfall ocurrs during summer, and we suggest that offspring production is timed to the best season to promote juvenile growth and survivorship. We found similarities between this reproductive cycle and those previously reported for U. stansburiana from the United States.

Palabras llave : Chihuahuan Desert; Biosphere Reserve of Mapimí; reproduction; Uta; dunes.

        · resumen en Español     · texto en Español     · Español ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons