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Egg size and annual egg production by female desert tortoises (Gopherus agassizii): the importance of food abundance, body size, and date of egg shelling

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Wallis, Ian R, Henen, Brian T, and Nagy, Kenneth A, Egg size and annual egg production by female desert tortoises (Gopherus agassizii): the importance of food abundance, body size, and date of egg shelling: .

Summary

ABSTRACT.-We studied egg production in two Californian populations of desert tortoises, (Gopherus agassizii) in 1992 and 1993. One population inhabited the Desert Tortoise Research Natural Area (DTNA) in the western Mojave Desert, where most of the rain falls in the winter. The second population lived near Goffs, in the eastern Mojave, where annual precipitation is divided more evenly between winter and summer. Due to El Niio conditions, heavy winter rains fell at both sites in both years (1991-1992 and 1992- 1993). Consequently, the biomass of spring annuals and annual egg production by tortoises were high in both years at both sites. There were no differences in reproductive output between years so we pooled data for both years to [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:08:31 MDT 2012

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Title Citation Egg size and annual egg production by female desert tortoises (Gopherus agassizii): the importance of food abundance, body size, and date of egg shelling

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