Body size, age and fecundity variation in different populations of the smooth newtTriturus vulgaris meridionalisin central Italy
作者:
Giovanni Nobili,
Fiorenza Accordi,
期刊:
Italian Journal of Zoology
(Taylor Available online 1997)
卷期:
Volume 64,
issue 4
页码: 313-318
ISSN:1125-0003
年代: 1997
DOI:10.1080/11250009709356219
出版商: Taylor & Francis Group
关键词: Triturus vulgaris meridionalis;Body size;Age;Fecundity;Breeding;Metamorphosis
数据来源: Taylor
摘要:
Adult and larval body size, age distribution and female fecundity, traits related to fitness in the smooth newtTriturus vulgaris meridionalis, were compared in populations differing in water stability conditions in the area surrounding Rome, near the southern limit of the distribution of this subspecies. Larval body size varied among populations at the end of metamorphosis and was positively related to water stability conditions, which probably led to differences in adult body size. In populations of temporary ponds, age at first breeding was lowered to two years. Traits of female fecundity correlated positively with body size, but not with age. The Italian smooth newt adapted to the unpredictable environment by optimizing reproductive strategies such as the exploitation of the short wet period by means of early deposition of large eggs, which can produce large larvae at metamorphosis.
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