The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

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pdf 06. Paedomorphosis and differences in the life history traits of two neighbouring crested newt (Triturus carnifex) populations

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Open Access

pp.151-158

Authors: M. L. Kalezic , D. Cvetkovic, A. Djorovic And G. Dzukic

Abstract: Two neighbouring crested newt populations (Ceklin and Lokanj) from Montenegro differ in several important life-history traits. Females from Ceklin laid significantly larger eggs. Larval size at hatching did not differ between Ceklin and Lokanj, but larvae from larger eggs survived better under laboratory conditions. Newts from Lokanj had a higher overall larval growth rate and a longer larval period. Consequently, they metamorphosed at larger size than Ceklin indivi duals. They also attained sexual maturity at smaller size than newts from Ceklin. It is shown that male newts with larval morphology may be sexually mature. Individuals from Lokanj population had a more plastic life-history, including facultative paedomorphosis, than individuals from Ceklin population. Out of five ontogenetic stages, juveniles and adult males showed significant interpopulation difference in size-shape trajectories. This might be the consequence of different ontogenetic pathways followed by crested newts from these populations.

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