scholarly journals Early swimming activity of hatchling flatback sea turtles Natator depressus: a test of the ‘predation risk’ hypothesis

2009 ◽  
Vol 9 ◽  
pp. 41-47 ◽  
Author(s):  
M Salmon ◽  
M Hamann ◽  
J Wyneken ◽  
C Schauble
Keyword(s):  
Predation Risk ◽  
Sea Turtles ◽  
Swimming Activity ◽  
Natator Depressus

The Development of Early Diving Behavior by Juvenile Flatback Sea Turtles (Natator depressus)

2010 ◽  
Vol 9 (1) ◽  
pp. 8-17 ◽  
Author(s):  
Michael Salmon ◽  
Mark Hamann ◽  
Jeanette Wyneken
Keyword(s):  
Sea Turtles ◽  
Diving Behavior ◽  
Natator Depressus

Frenzy and Postfrenzy Swimming Activity in Loggerhead, Green, and Leatherback Hatchling Sea Turtles

Copeia ◽  
1992 ◽  
Vol 1992 (2) ◽  
pp. 478 ◽  
Author(s):  
Jeanette Wyneken ◽  
Michael Salmon
Keyword(s):  
Sea Turtles ◽  
Swimming Activity

The effect of incubation temperatures on nest success of flatback sea turtles (Natator depressus)

2016 ◽  
Vol 163 (7) ◽  
Author(s):  
Stephanie van Lohuizen ◽  
Jason Rossendell ◽  
Nicola J. Mitchell ◽  
Michele Thums
Keyword(s):  
Sea Turtles ◽  
Nest Success ◽  
Incubation Temperatures ◽  
Natator Depressus

scholarly journals Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)

2020 ◽  
Author(s):  
Ray M Chatterji ◽  
Mark N Hutchinson ◽  
Marc E H Jones
Keyword(s):  
Phylogenetic Relationships ◽  
Sea Turtles ◽  
Sea Turtle ◽  
Molecular Data ◽  
Morphological Data ◽  
Morphological Evidence ◽  
Molecular Evidence ◽  
Crown Group ◽  
Extant Species ◽  
Natator Depressus

Abstract Chelonioidea (sea turtles) are a group where available morphological evidence for crown-group relationships are incongruent with those established using molecular data. However, morphological surveys of crown-group taxa tend to focus on a recurring subset of the extant species. The Australian flatback sea turtle, Natator depressus, is often excluded from comparisons and it is the most poorly known of the seven extant species of Chelonioidea. Previous descriptions of its skull morphology are limited and conflict. Here we describe three skulls of adult N. depressus and re-examine the phylogenetic relationships according to morphological character data. Using X-ray micro Computed Tomography we describe internal structures of the braincase and identify new phylogenetically informative characters not previously reported. Phylogenetic analysis using a Bayesian approach strongly supports a sister-group relationship between Chelonia mydas and N. depressus, a topology that was not supported by previous analyses of morphological data but one that matches the topology supported by analysis of molecular data. Our results highlight the general need to sample the morphological anatomy of crown-group taxa more thoroughly before concluding that morphological and molecular evidence are incongruous.

Plastic flipper tags are inadequate for long-term identification of the flatback sea turtle (Natator depressus)

2003 ◽  
Vol 30 (5) ◽  
pp. 519 ◽  
Author(s):  
C. J. Parmenter
Keyword(s):  
Sea Turtles ◽  
Sea Turtle ◽  
Wild Duck ◽  
Pit Tagging ◽  
Natator Depressus ◽  
Term Identification ◽  
Nesting Season

Two styles of plastic tags were used on flatback sea turtles (Natator depressus). In parallel with conventional metal flipper tagging, and internal PIT tagging methodologies, a total of 476 plastic tags were applied to 428 individual females in the 1991, 1992, 1993 and 1998 nesting seasons at Wild Duck Island, Queensland. Data are reported up to and including the 2000 nesting season demonstrating that plastic tags are inadequate for the long-term identification of these turtles, with failures of approximately 80% within three years of application.

Elevated nest predation risk promotes offspring size variation in birds with prolonged parental care.

2019 ◽  
Author(s):  
Gretchen F. Wagner ◽  
Emeline Mourocq ◽  
Michael Griesser
Keyword(s):  
Predation Risk ◽  
Reproductive Cycle ◽  
Perceived Risk ◽  
Nest Predation ◽  
Bird Species ◽  
Size Variation ◽  
Egg Laying ◽  
Offspring Size ◽  
Natural Predation ◽  
Risk Spreading

Predation of offspring is the main cause of reproductive failure in many species, and the mere fear of offspring predation shapes reproductive strategies. Yet, natural predation risk is ubiquitously variable and can be unpredictable. Consequently, the perceived prospect of predation early in a reproductive cycle may not reflect the actual risk to ensuing offspring. An increased variance in investment across offspring has been linked to breeding in unpredictable environments in several taxa, but has so far been overlooked as a maternal response to temporal variation in predation risk. Here, we experimentally increased the perceived risk of nest predation prior to egg-laying in seven bird species. Species with prolonged parent-offspring associations increased their intra-brood variation in egg, and subsequently offspring, size. High risk to offspring early in a reproductive cycle can favour a risk-spreading strategy particularly in species with the greatest opportunity to even out offspring quality after fledging.

Presence of chelonid herpesvirus 5 (ChHV5) in sea turtles in northern Sinaloa, Mexico

2019 ◽  
Vol 132 (2) ◽  
pp. 99-108
Author(s):  
RY Mejía-Radillo ◽  
AA Zavala-Norzagaray ◽  
JA Chávez-Medina ◽  
AA Aguirre ◽  
CM Escobedo-Bonilla
Keyword(s):  
Sea Turtles
Sign in / Sign up

Export Citation Format

Share Document