Jonathan Kirk Warner- PhD
- Alligator Program Leader at Texas Parks and Wildlife Department
Jonathan Kirk Warner
- PhD
- Alligator Program Leader at Texas Parks and Wildlife Department
About
40
Publications
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146
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Introduction
Skills and Expertise
Current institution
Texas Parks and Wildlife Department
Current position
- Alligator Program Leader
Publications
Publications (40)
Nesting biology and ecology have been investigated for Nile crocodiles (Crocodylus niloticus), but information on behaviour and movement patterns of nesting females during nest guarding is scant. Consequently, we investigated the home ranges, nest-site selection strategies, movement patterns, activity levels and nest fidelity of four nesting female...
Information regarding nest predation, nest abandonment, and maternal care in the Nile crocodile (Crocodylus niloticus) is largely restricted to anecdotal observations, and has not been studied quantitatively. Consequently, we investigated their nesting biology using camera-traps over four years at Lake St Lucia, South Africa. We obtained 4,305 phot...
Animal body size and sex are requisite data for understanding population structure and demography. Little information exists regarding Nile crocodile, Crocodylus niloticus, morphometrics, sex ratios of wild populations, sexual size dimorphism and standing crop biomass. We captured 322 C. niloticus at Lake St Lucia and Ndumo Game Reserve, South Afri...
Generally crocodilians have received little attention with regard to the effects of lead toxicity despite their trophic status as apex, generalist predators that utilize both aquatic and terrestrial habitats, thereby exposing them to a potentially wide range of environmental contaminants. During July-October 2010 we collected whole blood from 34 su...
Swan, G. (ed.). SANParks AUCC approved. South African National Parks, Skukuza.
Accurate classification of sex is essential for life history studies. Benchmark sizes that can represent the size of either the smallest, average, or upper size limit of males in a population exhibiting secondary sexual characters (SSCs) are often used to assign sex in emydid turtles. This method may be problematic, however, as it ignores variation...
Accurate identification of sexually mature individuals is essential for life-history studies. In emydid turtles, secondary sexual characters (SSCs) are most often used to identify male maturity while numerous other methods exist. In this study, we examined the association between body size, age, foreclaw length (FCL), preanal tail length (PTL), tes...
