Nest placement by loggerhead turtles, Caretta caretta

Graeme C. Hays*, John R. Speakman

*Corresponding author for this work

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Nest placement by loggerhead turtles nesting on the island of Cephalonia, Greece, was examined. The spatial distribution of nests was not uniform (N = 27 nests): They tended to be laid away from the sea, but not in vegetation that backed the beach. Hatchling success (recorded for eight nests) increased significantly for nests laid further from the sea. Hence most nests were laid in positions where hatchling success was high. Six individuals were observed to nest more than once. Each of these multiple nesters showed little consistency in the distance that they nested from the sea (i.e. within-individual variation was high), and hence no significant differences in nest positioning between individuals were detected. Digging attempts in the vegetation behind the beach were frequently aborted (71% of attempts), but attempts in the open sand between the vegetation and the sea were aborted less often (11% of attempts). Sand temperatures at the depths where eggs incubated were higher further from the sea. The implications of nest placement for hatchling sex ratio are discussed.

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalAnimal Behaviour
Volume45
Issue number1
DOIs
Publication statusPublished - 31 Jan 1993

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Caretta caretta
turtle
nest
nests
vegetation
beaches
beach
sand
individual variation
Greece
sex ratio
positioning
sea
spatial distribution
egg

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Nest placement by loggerhead turtles, Caretta caretta. / Hays, Graeme C.; Speakman, John R.

In: Animal Behaviour, Vol. 45, No. 1, 31.01.1993, p. 47-53.

Research output: Contribution to journalArticle

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