Sexual selection favours large body size in males of a tropical snake (Stegonotus cucullatus, Colubridae)
نویسندگان
چکیده
0003-3472/$38.0
منابع مشابه
Male-biased dispersal in a tropical Australian snake (Stegonotus cucullatus, Colubridae).
Sex-based differences in dispersal distances can affect critical population parameters such as inbreeding rates and the spatial scale of local adaptation. Males tend to disperse further than females in mammals, whereas the reverse is true for birds; too few reptiles have been studied to reveal generalities for that group. Although reptiles are most diverse and abundant in the tropics, few tropi...
متن کاملSpatial ecology of slatey-grey snakes (Stegonotus cucullatus, Colubridae) on a tropical Australian floodplain
The extent, sequence, synchrony and correlates of diel displacements by animals can provide powerful insights into the ecological and social factors that shape an organism’s day-to-day activities, but detailed data on spatial ecology are available for very few tropical taxa. Radiotelemetricmonitoring of 25 slatey-grey snakes (Stegonotus cucullatus) on a floodplain in the Australian wet-dry trop...
متن کاملPERMANENT GENETIC RESOURCES: Characterization of tri- and tetranucleotide microsatellite loci for the slatey-grey snake (Stegonotus cucullatus, Colubridae).
We characterized nine polymorphic microsatellite (six trinucleotides and three tetranucleotides) loci for the slatey-grey snake (Stegonotus cucullatus) from Australia, in order to study the mating system of this species. Based on a total of 100 samples, the number of alleles per locus ranged from three to 10, and the observed and expected heterozygosities ranged from 0.62 to 0.86 and from 0.53 ...
متن کاملResponses of three sympatric snake species to tropical seasonality in northern Australia
In the Australian wet–dry tropics, temperatures are high year-round but rainfall is concentrated in a 4-mo wet season. Regular nightly surveys in the Fogg Dam Nature Reserve provided data on temporal (monthly, seasonal) variation in biological attributes of three snake species: water pythons (Liasis fuscus, Pythonidae), keelbacks (Tropidonophis mairii, Colubridae) and slatey-grey snakes (Stegon...
متن کاملSexual size dimorphism and timing of spring migration in birds.
Sexually selected traits are limited by selection against those traits in other fitness components, such as survival. Thus, sexual selection favouring large size in males should be balanced by higher mortality of larger males. However, evidence from red-winged blackbirds (Agelaius phoeniceus) indicates that large males survive better than small males. A survival advantage to large size could re...
متن کامل