A montane amphibian and its feeding habits:Salamandra lanzai(Caudata, Salamandridae) in the Alps of northwestern Italy
作者:
Franco Andreone,
Sara De Michelis,
Valentina Clima,
期刊:
Italian Journal of Zoology
(Taylor Available online 1999)
卷期:
Volume 66,
issue 1
页码: 45-49
ISSN:1125-0003
年代: 1999
DOI:10.1080/11250009909356236
出版商: Taylor & Francis Group
关键词: Salamandra lanzai;Salamandridae;Stomach content;Diet;Ecology;Seasonal variation;High altitude
数据来源: Taylor
摘要:
Feeding habits in a population ofSalamandra lanzaiwere studied at an Alpine meadow at 2020 m a.s.l. in the Cottian Alps, NW Italy. Adult specimens underwent stomach flushing was applied to in June and September 1992, and in July 1993.Salamandra lanzaiproved to be an opportunistic predator, feeding on invertebrates within a broad range of categories and sizes. Ground‐dwelling insects (especially carabids) constituted the main part of the diet. AlthoughS. lanzaiis commonly believed to be a completely terrestrial species, some individuals were observed to feed on aquatic Trichoptera larvae. The utilization of prey taxa by number of specimens consumed and volume consumed varied seasonally. Mean ingested volume per salamander averaged 173–76 ± 449.31 mm3, i.e., about 1.39% of the average salamander mass (12.56 ± 3.43 g; range 6.0–22.5 g). Prey mass and predator mass were positively correlated in males, which most likely are more active than females. The prey mass to predator mass ratio was not significantly correlated with log predator mass, neither for males nor for females.
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