C. Samantha Sherman
A5032101752- Ichthyology and Marine Biology
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Identification and Quantification in Food
- Underwater Vehicles and Communication Systems
- Marine Ecology and Invasive Species
- Fish biology, ecology, and behavior
- Ocean Acidification Effects and Responses
Simon Fraser University
2020-2024
James Cook University
2018-2024
Deakin University
2024
AIMS@JCU
2018-2020
The scale and drivers of marine biodiversity loss are being revealed by the International Union for Conservation Nature (IUCN) Red List assessment process. We present first global reassessment 1,199 species in Class Chondrichthyes-sharks, rays, chimeras. (in 2014) concluded that one-quarter (24%) were threatened. Now, 391 (32.6%) threatened with extinction. When this percentage threat is applied to Data Deficient species, more than one-third (37.5%) chondrichthyans estimated be threatened,...
Abstract Sharks and rays are key functional components of coral reef ecosystems, yet many populations a few species exhibit signs depletion local extinctions. The question is whether these declines forewarn global extinction crisis. We use IUCN Red List to quantify the status, trajectory, threats all sharks worldwide. Here, we show that nearly two-thirds (59%) 134 coral-reef associated shark ray threatened with extinction. Alongside marine mammals, among most groups found on reefs....
A global survey of coral reefs reveals that overfishing is driving resident shark species toward extinction, causing diversity deficits in reef elasmobranch (shark and ray) assemblages. Our species-level analysis revealed declines 60 to 73% for five common individual were not detected at 34 47% surveyed reefs. As become more shark-depleted, rays begin dominate Shark-dominated assemblages persist wealthy nations with strong governance highly protected areas, whereas poverty, weak governance,...
The deep ocean is the last natural biodiversity refuge from reach of human activities. Deepwater sharks and rays are among most sensitive marine vertebrates to overexploitation. One-third threatened deepwater targeted, half species targeted for international liver-oil trade with extinction. Steep population declines cannot be easily reversed owing long generation lengths, low recovery potentials, near absence management. Depth spatial limits fishing activity could improve conservation when...
Abstract Marine species and ecosystems are widely affected by anthropogenic stressors, ranging from pollution fishing to climate change. Comprehensive assessments of how impacted stressors critical for guiding conservation management investments. Previous global risk or vulnerability have focused on marine habitats, limited taxa specific regions. However, information about the susceptibility across a range different everywhere is required predict biodiversity will respond human pressures. We...
Overfishing is the most significant threat facing sharks and rays. Given growth in consumption of seafood, combined with compounding effects habitat loss, climate change, pollution, there a need to identify recovery paths, particularly poorly managed monitored fisheries. Here, we document conservation through fisheries management success for 11 coastal US waters by comparing population trends Bayesian state-space model before after implementation 1993 Fisheries Management Plan Sharks. We...
Shark abundances are decreasing on many coral reefs, but the ecosystem effects of this loss poorly understood. Rays a prevalent mesopredator in tropical reef ecosystems that preyed upon by top predators like sharks. Studies have suggested reduced predator lead to increases abundance (mesopredator release). We examined relationship between and behaviour 2 small benthic ray genera using baited remote underwater video systems (BRUVS) across 6 countries. Where were more abundant, rays sighted...
The true state of ocean biodiversity is difficult to assess, and there are few global indicators track the primary threat overfishing. We calculated a 50-year Red List Index extinction risk ecological function for 1199 sharks rays found that since 1970, overfishing has halved their populations worsened by 19%. Overfishing largest species in nearshore pelagic habitats risks loss ecomorphotypes 5 22% erosion functional diversity. Extinction higher countries with large human coastal but lower...
Abstract Most of the international trade in fins (and likely meat too) is derived from requiem sharks (family Carcharhinidae), yet only two 56 species currently regulated. Here, we quantify catch, trade, and shortfall national regional fisheries management (M‐Risk) for all shark based on 831 assessments across 30 countries four Regional Fisheries Management Organizations (RFMOs). Requiem comprise over half (60%) annual reported global Chondrichthyan catch with most (86%) identified fin...
Abstract Fisheries management is essential to guarantee sustainable capture of target species and avoid undesirable declines incidentally captured species. A key challenge halting reversing shark ray species, specifically assessing the degree which sufficient in relatively data‐poor fisheries. While ecological risk analyses focus on intrinsic ‘productivity’ extrinsic ‘susceptibility’, one would ideally consider influence ‘fisheries management’. Currently, there no single evaluation that can...
Baited remote underwater video stations (BRUVS) are increasingly being used to evaluate and monitor reef communities. Many BRUVS studies compare multiple sites sampled at single time points that may differ from the sampling of another site. As use grows in its application provide data relevant sustainable management, marine protected area success, overall health, understanding repeatability results is vital. We examined for elasmobranch community both within between seasons years, explored...
Abstract Some sharks and rays are subject to fisheries catch international trade regulations. However, the Guitarfishes (family Rhinobatidae) a highly threatened group with minimal Substantial underreporting of broad commodity codes for traded products masking true volume included in trade. Here, we collate information that have not readily been documented trade, possibly due poor resolution molecular genetic markers, begin document extent We assess shortfall management (M-Risk) all species...
ABSTRACT Fisheries management is essential to guarantee sustainable capture of target species and avoid undesirable declines incidentally captured species. A key challenge halting reversing shark ray species, specifically assessing the degree which sufficient in relatively data-poor fisheries. While ecological risk analyses focus on intrinsic ‘productivity’ extrinsic ‘susceptibility’, one would ideally consider influence ‘fisheries management’. Currently, there no single evaluation that can...
ABSTRACT Most of the international trade in fins (and likely meat too) is derived from requiem sharks (family Carcharhinidae), yet only two 56 species currently regulated. Here, we quantify catch, trade, and shortfall national regional fisheries management (M-Risk) for all shark based on 831 assessments across 30 countries four Regional Fisheries Management Organisations (RFMOs). Requiem comprise over half (60%) annual reported global chondrichthyan catch with most (86%) identified fin...