49 Result(s)
within
Colin A. Simpfendorfer
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Directed conservation of the world’s reef sharks and rays
Many shark populations are in decline around the world, with severe ecological and economic consequences. Fisheries management and marine protected areas (MPAs) have both been heralded as solutions. However, t...
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Open AccessFrom little things big things grow: enhancement of an acoustic telemetry network to monitor broad-scale movements of marine species along Australia’s east coast
Acoustic telemetry has become a fundamental tool to monitor the movement of aquatic species. Advances in technology, in particular the development of batteries with lives of > 10 years, have increased our abil...
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Open AccessHalf a century of rising extinction risk of coral reef sharks and rays
Sharks and rays are key functional components of coral reef ecosystems, yet many populations of a few species exhibit signs of depletion and local extinctions. The question is whether these declines forewarn o...
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Open AccessStructure and permeability of the egg capsule of the placental Australian sharpnose shark, Rhizoprionodon taylori
Shark placentae are derived from modifications to the fetal yolk sac and the maternal uterine mucosa. In almost all placental sharks, embryonic development occurs in an egg capsule that remains intact for the ...
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Preliminary age and growth estimates of the blue shark (Prionace glauca) from Papua New Guinea
Blue sharks (Prionace glauca) are recognised as one of five key pelagic shark species in the Western Central Pacific Ocean (WCPO) due to their frequent incidental catch in tuna and billfish longline fisheries. Gi...
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Intra-specific variation in movement and habitat connectivity of a mobile predator revealed by acoustic telemetry and network analyses
Few studies have considered linkages of mobile predators across large spatial scales despite their significant and often critical role in maintaining ecosystem function and health. The bull shark (Carcharhinus le...
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Understanding non-compliance in small-scale fisheries: Shark fishing in Myanmar’s Myeik Archipelago
Achieving fisheries compliance is challenging in contexts where enforcement capacity is limited and the incentives for rule-breaking are strong. This challenge is exemplified in Myanmar, where an active shark ...
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Half a century of global decline in oceanic sharks and rays
Overfishing is the primary cause of marine defaunation, yet declines in and increasing extinction risks of individual species are difficult to measure, particularly for the largest predators found in the high ...
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Open AccessThe power struggle: assessing interacting global change stressors via experimental studies on sharks
Ocean warming and acidification act concurrently on marine ectotherms with the potential for detrimental, synergistic effects; yet, effects of these stressors remain understudied in large predatory fishes, inc...
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Author Correction: Global status and conservation potential of reef sharks
An Amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Global status and conservation potential of reef sharks
Decades of overexploitation have devastated shark populations, leaving considerable doubt as to their ecological status1,2. Yet much of what is known about sharks has been inferred from catch records in industria...
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Categorising use patterns of non-marine environments by elasmobranchs and a review of their extinction risk
As the state of non-marine aquatic environments (freshwater and estuarine environments with salinities ≤ 30 ppt) continues to decline globally, there is increasing concern for elasmobranchs (sharks and rays) t...
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Estimating oxygen uptake rates to understand stress in sharks and rays
Elasmobranch populations face worldwide declines owing to anthropogenic stressors, with lethal and sub-lethal consequences. Oxygen uptake rates ( ...
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Interspecific interactions, movement patterns and habitat use in a diverse coastal shark assemblage
Sharks are a highly diverse predatory taxon and are regularly found in large, potentially competitive, assemblages. However, the mechanisms that enable long-term coexistence and factors that drive complementar...
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Open AccessA standardised framework for analysing animal detections from automated tracking arrays
Over the past 15 years, the integration of localised passive telemetry networks into centralised data repositories has greatly enhanced our ability to monitor the presence and movements of highly mobile and mi...
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Reef-scale variability in fish and coral assemblages on the central Great Barrier Reef
Coral reefs are threatened by changing climatic conditions, which will potentially alter the frequency and severity of disturbances in coming decades, casting doubt over the potential for reefs to recover and ...
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Strong trans-Pacific break and local conservation units in the Galapagos shark (Carcharhinus galapagensis) revealed by genome-wide cytonuclear markers
The application of genome-wide cytonuclear molecular data to identify management and adaptive units at various spatio-temporal levels is particularly important for overharvested large predatory organisms, ofte...
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Open AccessContinental-scale animal tracking reveals functional movement classes across marine taxa
Acoustic telemetry is a principle tool for observing aquatic animals, but coverage over large spatial scales remains a challenge. To resolve this, Australia has implemented the Integrated Marine Observing Syst...
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Genome-wide SNPs reveal low effective population size within confined management units of the highly vagile Galapagos shark (Carcharhinus galapagensis)
The Galapagos shark (Carcharhinus galapagensis) is one of over thirty shark species inhabiting the Galápagos Marine Reserve (GMR), where it is a priority species for conservation. Identifying stock structure and ...
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Life history of the silvertip shark Carcharhinus albimarginatus from Papua New Guinea
Growth and maturity of the silvertip shark Carcharhinus albimarginatus from Papua New Guinea were estimated to form the basis of future population assessments. Samples were collected from commercial longline vess...
