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Reproduction of the Endangered Hierro Giant Lizard Gallotia simonyi machadoi

M. A. Rodríguez-Domínguez and M. Molina-Borja
Journal of Herpetology
Vol. 32, No. 4 (Dec., 1998), pp. 498-504
DOI: 10.2307/1565203
Stable URL: http://www.jstor.org/stable/1565203
Page Count: 7
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Reproduction of the Endangered Hierro Giant Lizard Gallotia simonyi machadoi
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Abstract

We present data on the reproduction of the endangered Hierro giant lizard (Gallotia simonyi machadoi). The general sequence of the reproductive cycle and time intervals of the different phases are described, together with courting and mating behavior patterns. Behavior patterns prior to mating included male head bobs with an inflated throat. In two courtship sequences, males performed seven consecutive head bobs of almost constant duration. Sexual activity, including copulation, began during the first two weeks of May. Clutches were laid from the first week of June until the end of August. Mean clutch size was 8.6 (range 5-13 eggs). Significant relationships were found between clutch size and female snout-to-vent length (SVL), clutch weight (CW) and female SVL, and between CW and female body weight. Mean relative clutch mass was 0.25. Eggs began to hatch in the beginning of August; at 28-29 C the incubation time averaged 61 days. Biometric data of different morphological traits are reported for 146 newborn lizards (3-20 days old).

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