POSTEMERGENCE BEHAVIOR OF NEONATES IN A NORTHERN PERIPHERAL-POPULATION OF BLANDINGS TURTLE, EMYDOIDEA-BLANDINGII, IN NOVA-SCOTIA

Citation
Kl. Standing et al., POSTEMERGENCE BEHAVIOR OF NEONATES IN A NORTHERN PERIPHERAL-POPULATION OF BLANDINGS TURTLE, EMYDOIDEA-BLANDINGII, IN NOVA-SCOTIA, Canadian journal of zoology, 75(9), 1997, pp. 1387-1395
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
75
Issue
9
Year of publication
1997
Pages
1387 - 1395
Database
ISI
SICI code
0008-4301(1997)75:9<1387:PBONIA>2.0.ZU;2-4
Abstract
The early postemergence behaviour of neonate Blanding's turtles, Emydo idea blandingii, was studied in Nova Scotia in 1994 and 1995 to test t he hypothesis that hatchlings go to water immediately upon emergence f rom the nest. At the northeastern limit of the species' range, hatchli ng turtles should seek aquatic hibernacula to avoid freezing; where em ergence from the nest is delayed until late autumn, selection pressure for water-seeking behaviour should be strong. Using pigmented powder that fluoresces under UV light, 78 hatchlings from 12 lakeshore nests and 2 inland nests were tracked for a maximum of 11 days. On the first day after emergence, hatchling movement was random with respect to wa ter. Hatchlings did not orient themselves with respect to slope, veget ation, or nestmates, nor did individuals follow a consistent compass b earing among days. Often trails were convoluted in the open and relati vely straight under dense vegetation. Evidence suggests that hatchling s in this population may overwinter in terrestrial as well as aquatic hibernacula.