Natal homing in juvenile loggerhead turtles (Caretta caretta)

Juvenile loggerhead turtles (Caretta caretta) from West Atlantic nesting beaches occupy oceanic (pelagic) habitats in the eastern Atlantic and Mediterranean, whereas larger juvenile turtles occupy shallow (neritic) habitats along the continental coastline of North America. Hence the switch from ocea...

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Vydáno v:Molecular ecology Ročník 13; číslo 12; s. 3797 - 3808
Hlavní autoři: BOWEN, BRIAN W., BASS, ANNA L., CHOW, SHAIO-MEI, BOSTROM, MEREDITH, BJORNDAL, KAREN A., BOLTEN, ALAN B., OKUYAMA, TOSHINORI, BOLKER, BENJAMIN M., EPPERLY, SHERYAN, LACASELLA, ERIN, SHAVER, DONNA, DODD, MARK, HOPKINS- MURPHY, SALLY R., MUSICK, JOHN A., SWINGLE, MARK, RANKIN-BARANSKY, KAREN, TEAS, WENDY, WITZELL, WAYNE N., DUTTON, PETER H.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford, UK Blackwell Publishing Ltd 01.12.2004
Témata:
Analysis of Variance
Animal behavior
Animal reproduction
Animals
Aquatic reptiles
Atlantic Ocean
Bayes Theorem
Bayesian
Coastal hazards
conservation genetics
Demography
DNA Primers
DNA, Mitochondrial - genetics
Feeding Behavior - physiology
Genetic Variation
Habitats
Haplotypes - genetics
Homing Behavior - physiology
Marine
marine turtles
Mitochondrial DNA
mixed stock analysis
Nesting
North America
Population structure
Reproduction - physiology
Reptiles & amphibians
Sequence Analysis, DNA
Sexual Behavior, Animal - physiology
Turtles
Turtles - genetics
Turtles - physiology
North America
Atlantic Ocean
ISSN:0962-1083, 1365-294X
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Shrnutí:Juvenile loggerhead turtles (Caretta caretta) from West Atlantic nesting beaches occupy oceanic (pelagic) habitats in the eastern Atlantic and Mediterranean, whereas larger juvenile turtles occupy shallow (neritic) habitats along the continental coastline of North America. Hence the switch from oceanic to neritic stage can involve a trans‐oceanic migration. Several researchers have suggested that at the end of the oceanic phase, juveniles are homing to feeding habitats in the vicinity of their natal rookery. To test the hypothesis of juvenile homing behaviour, we surveyed 10 juvenile feeding zones across the eastern USA with mitochondrial DNA control region sequences (N = 1437) and compared these samples to potential source (nesting) populations in the Atlantic Ocean and Mediterranean Sea (N = 465). The results indicated a shallow, but significant, population structure of neritic juveniles (ΦST = 0.0088, P = 0.016), and haplotype frequency differences were significantly correlated between coastal feeding populations and adjacent nesting populations (Mantel test R2 = 0.52, P = 0.001). Mixed stock analyses (using a Bayesian algorithm) indicated that juveniles occurred at elevated frequency in the vicinity of their natal rookery. Hence, all lines of evidence supported the hypothesis of juvenile homing in loggerhead turtles. While not as precise as the homing of breeding adults, this behaviour nonetheless places juvenile turtles in the vicinity of their natal nesting colonies. Some of the coastal hazards that affect declining nesting populations may also affect the next generation of turtles feeding in nearby habitats.
Bibliografie:istex:D9310F1B6E0B900611F19F786DBCD0B773528138
ark:/67375/WNG-J9K9TZ97-R
ArticleID:MEC2356
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ISSN:0962-1083
1365-294X
DOI:10.1111/j.1365-294X.2004.02356.x