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Age and size at maturity are major life history traits, because they in1uence lifetime fecundity. 2ey represent
the outcome from complex interactions among environmental pressures (abiotic and biotic) and individual characteristics.
2ey are also di0cult to measure in natural populations and thus they are rarely appraised, especially in
reptiles due...
Context in source publication
Context 1
... using a LEICA DC300F camera assembled with a WILD HEERBRUGG MAKROSKOP M 420 1.25×. Using an image-editing computer software, the distance from the basis of the first visible zone (corresponding to the first active season bone growth) and the basis of next zone was measured along a straight line broadly perpendicular to SGM and transecting LAGs (Fig. ...
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Citations
... Size and age at maturity are dominant lifehistory traits, as they shape lifetime fecundity. These constitute the outcome from complex interactions among environmental pressures and individual characteristics (Fornasiero et al., 2016). The maturity of juveniles is challenging to measure in the wild populations, and thus they are rarely evaluated, especially in reptiles due to the secretive nature of young ones (Fornasiero et al., 2016). ...
... These constitute the outcome from complex interactions among environmental pressures and individual characteristics (Fornasiero et al., 2016). The maturity of juveniles is challenging to measure in the wild populations, and thus they are rarely evaluated, especially in reptiles due to the secretive nature of young ones (Fornasiero et al., 2016). Python molurus is a large, heavy-bodied non -venomous ambush snake (Bhupathy, 1990;Bhupathy et al., 2014); found in large, undisturbed stretches of diverse habitats in the Indian sub-continent (Ramesh, 2012, Whitaker, 1993Bhupathy & Vijayan, 1989). ...
Indian python Python molurus (Linnaeus, 1758) is one of the world's giant snakes with maximum lengths measured six to eight well exceeding six meters. Nevertheless, information on the size at maturity of P. molurus is not available in the wild. On February 9, 2019, 12:56 pm, one female and two males were observed during the group mating in Moyar River Valley Landscape, Southern India. We report the first observation on smallest male measuring 198 cm total length, 172 cm snout-vent length and weighing 3.3.kg mated with a radio-tagged larger female. At the end of the mating event everted hemi penis observed from male pythons. Our observation on the mating and morphology details of P. molurus gives the first glimpse of juvenile the male maturity that representing the youngest known free-ranging matured male of this poorly studied species in its native distribution range.
Aging evolutionary theories predict that patterns of actuarial and reproductive senescence should be aligned, with a common onset of senescence set at the age of first reproduction. However, a few empirical studies reported asynchrony between actuarial and reproductive senescence. This asynchrony is expected to be particularly pronounced in organisms with indeterminate growth. Yet, this process is still poorly documented due to the lack of long-term demographic data on known-aged individuals. We investigated the asynchrony of actuarial and reproductive senescence in the European whip snake, Hierophis viridiflavus, an oviparous colubrid with indeterminate growth. Using demographic data collected over a 29-year period, we showed that females did not experience any fecundity loss late in life. In contrast, they suffered from an early, severe actuarial senescence. Our findings thus revealed a pronounced asynchrony in actuarial and reproductive senescence processes, a phenomenon that could be widespread across the tree of life.
