scholarly journals Seasonal and life-stage variation in the reproductive ecology of a marine apex predator, the tiger shark Galeocerdo cuvier, at a protected female-dominated site

2016 ◽  
Vol 24 (3) ◽  
pp. 175-184 ◽  
Author(s):  
JA Sulikowski ◽  
CR Wheeler ◽  
AJ Gallagher ◽  
BK Prohaska ◽  
JA Langan ◽  
...  
Keyword(s):  
Life Stage ◽  
Reproductive Ecology ◽  
Tiger Shark ◽  
Apex Predator ◽  
Galeocerdo Cuvier

scholarly journals Ocean warming alters the distributional range, migratory timing, and spatial protections of an apex predator, the tiger shark ( Galeocerdo cuvier )

2022 ◽  
Author(s):  
Neil Hammerschlag ◽  
Laura H. McDonnell ◽  
Mitchell J. Rider ◽  
Garrett M. Street ◽  
Elliott L. Hazen ◽  
...  
Keyword(s):  
Ocean Warming ◽  
Tiger Shark ◽  
Apex Predator ◽  
Galeocerdo Cuvier ◽  
Distributional Range ◽  
Migratory Timing

scholarly journals Genetic population structure and demography of an apex predator, the tiger shark Galeocerdo cuvier

2019 ◽  
Vol 9 (10) ◽  
pp. 5551-5571 ◽  
Author(s):  
Agathe Pirog ◽  
Sébastien Jaquemet ◽  
Virginie Ravigné ◽  
Geremy Cliff ◽  
Eric Clua ◽  
...  
Keyword(s):  
Population Structure ◽  
Genetic Population Structure ◽  
Tiger Shark ◽  
Apex Predator ◽  
Genetic Population ◽  
Galeocerdo Cuvier

A Comparison of Reproductive and Energetic States in a Marine Apex Predator (the Tiger Shark, Galeocerdo cuvier)

2018 ◽  
Vol 91 (4) ◽  
pp. 933-942 ◽  
Author(s):  
Neil Hammerschlag ◽  
Rachel A. Skubel ◽  
James Sulikowski ◽  
Duncan J. Irschick ◽  
Austin J. Gallagher
Keyword(s):  
Tiger Shark ◽  
Apex Predator ◽  
Galeocerdo Cuvier

Lipophilic arsenic compound(s) in the liver of a tiger shark(Galeocerdo cuvier)

1988 ◽  
Vol 2 (4) ◽  
pp. 377-384 ◽  
Author(s):  
Mariko Miyajima ◽  
Noriaki Hamada ◽  
Etsuro Yoshimura ◽  
Akira Okubo ◽  
Sunao Yamazaki ◽  
...  
Keyword(s):  
Tiger Shark ◽  
Arsenic Compound ◽  
Galeocerdo Cuvier

Retrospective Genomics Suggests the Disappearance of a Tiger Shark (Galeocerdo Cuvier) Population Off South-Eastern Australia

2021 ◽  
Author(s):  
Alice Manuzzi ◽  
Belen Jiménez-Mena ◽  
Romina Henriques ◽  
Bonnie J. Holmes ◽  
Julian Pepperell ◽  
...  
Keyword(s):  
Anthropogenic Disturbance ◽  
East Coast ◽  
Tiger Shark ◽  
Galeocerdo Cuvier ◽  
Relative Contribution ◽  
Eastern Australia ◽  
Genomic Analyses ◽  
Dramatic Shift ◽  
Well Differentiated ◽  
Two Populations

Abstract Over the last century, many populations of sharks have been reduced in numbers by overexploitation or attempts to mitigate human-shark interactions. Still, there is a general perception that populations of large ocean predators cover wide areas and therefore their diversity is less susceptible to local anthropogenic disturbance. Here we report retrospective genomic analyses of DNA using archived and contemporary samples of tiger shark (Galeocerdo cuvier) from eastern Australia. Using SNP loci, we documented a significant overall change in genetic composition of tiger sharks born over the last century. The change was most likely due to a shift over time in the relative contribution of two well differentiated, but hitherto cryptic populations. Our data strongly indicate a dramatic shift in relative contribution of the two populations to the overall tiger shark abundance of the east coast of Australia, possibly associated with differences in direct or indirect exploitation rates.

Behavioural transition probabilities in dugongs change with habitat and predator presence: implications for sirenian conservation

2012 ◽  
Vol 63 (11) ◽  
pp. 1069 ◽  
Author(s):  
Aaron J. Wirsing ◽  
Michael R. Heithaus
Keyword(s):  
Transition Probabilities ◽  
Continuous Series ◽  
Tiger Shark ◽  
Predator Detection ◽  
Shark Bay ◽  
Galeocerdo Cuvier ◽  
Shallow Habitat ◽  
Deep Habitat ◽  
Behavioural Adjustment ◽  
Log Linear

Although not widely appreciated, prey can manage predation risk by modifying the sequence of their behavioural states. We explored this phenomenon in dugongs (Dugong dugon) subject to spatially and temporally variable risk of tiger shark (Galeocerdo cuvier) predation in Shark Bay, Australia. Dugong behaviour was assayed using focal follows and organised into sequences of foraging, resting, and travelling bouts. We used log-linear analysis to test for sequence differences in relation to habitat (deep, shallow) and predation danger (sharks present, largely absent). Dugongs modified their behavioural sequences between periods of high and low shark abundance: those at risk alternated more frequently between foraging, which constrains anti-predator vigilance, and travelling, which facilitates predator detection. Dugongs also avoided continuous series of resting bouts, during which awareness is reduced, when sharks were present. These changes were only observed in relatively dangerous shallow habitat, which is hunted disproportionately by tiger sharks; behavioural responses to sharks in deep habitat were modest. We conclude that dugongs in risky habitat resort to safer behavioural sequences in response to sharks. Given that human disturbance and predators are perceived similarly by many species, some forms of vessel interaction could compromise the fitness of sirenians by eliciting similar behavioural adjustment.

Tiger shark (Galeocerdo cuvier) movement patterns and habitat use determined by satellite tagging in eastern Australian waters

2014 ◽  
Vol 161 (11) ◽  
pp. 2645-2658 ◽  
Author(s):  
Bonnie J. Holmes ◽  
Julian G. Pepperell ◽  
Shane P. Griffiths ◽  
Fabrice R. A. Jaine ◽  
Ian R. Tibbetts ◽  
...  
Keyword(s):  
Habitat Use ◽  
Movement Patterns ◽  
Tiger Shark ◽  
Galeocerdo Cuvier ◽  
Satellite Tagging
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