The breeding migrations of smooth and Palmate newts(Triturus-vulgaris and T-helveticus)at a pond in mid Wales

Harrison, J. D., Gittins, S. P. and Slater, Frederick Maurice 1983. The breeding migrations of smooth and Palmate newts(Triturus-vulgaris and T-helveticus)at a pond in mid Wales. Journal of Zoology 199 (2) , pp. 249-258. 10.1111/j.1469-7998.1983.tb02093.x

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Abstract

The breeding population sizes of newts at Llysdinam Pond in 1981 are estimated at around 800 Palmate and 300 Smooth newts. Females were more numerous than males with sex ration of 3.0: 1 for Palamte and 2.6: 1 for Smooth newts. The movement of males of both species into the pond preceded that of females, and female Palmate newts moved out of the pond significantly later than the other classes. The number of females of both species leaving the pond was much less than the number entering, apparently as a result of mortality whilst in the pond. Females leaving the pond were significantly lighter than those entering, and for female Palmate newts the weight loss in only partly attributable to loss of egg load. Temperature and humidity were important factors influencing the number of newts active during the inward migration period, but had little effect on activity during the outward migration.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences
Subjects:	Q Science > QL Zoology
Publisher:	Wiley-Blackwell
ISSN:	0952-8369
Last Modified:	04 Jun 2017 05:16
URI:	https://orca.cardiff.ac.uk/id/eprint/50233

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