Distorting Gene Pools by Conservation: Assessing the Case of Doomed Turtle Eggs |
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Authors: | N Mrosovsky |
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Institution: | (1) Department of Zoology, University of Toronto, Toronto, Ontario, M5S 3G5, Canada |
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Abstract: | Sea turtles have a high reproductive output and high mortality at early stages of the life cycle. In particular, many nests
are laid below or close to high tide lines, and subsequently large numbers of eggs may be inundated and destroyed. A common
conservation procedure is to relocate such doomed eggs to higher ground. This article examines this practice in the light
of recent data revealing that some individual turtles tend to nest relatively near the water and others relatively higher
up the beach. Discussion is focused on the question of why apparently poor placement of nests has not been selected against.
Comparison between the ecology of leatherback and hawksbill turtle nesting beaches suggests that predictability of environmental
conditions on the nesting beaches has an important influence on patterns of nest-site selection. Options are outlined for
the management of nesting beaches where a high proportion of turtle eggs is subject to destruction by flooding.
An erratum to this article is available at. |
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Keywords: | Doomed eggs Individual differences Nest-site preference Relocation Sea turtles Stabilizing selection |
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