A5065257057- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Isotope Analysis in Ecology
- Physiological and biochemical adaptations
- Environmental DNA in Biodiversity Studies
- Identification and Quantification in Food
- Per- and polyfluoroalkyl substances research
- Marine Ecology and Invasive Species
- Marine Bivalve and Aquaculture Studies
- Cardiovascular and Diving-Related Complications
- Atmospheric chemistry and aerosols
- Parasite Biology and Host Interactions
- Ocean Acidification Effects and Responses
- Toxic Organic Pollutants Impact
- Marine and coastal ecosystems
- Aquaculture Nutrition and Growth
- Underwater Acoustics Research
- Marine Biology and Ecology Research
- Cephalopods and Marine Biology
Cape Eleuthera Institute
2015-2025
Florida International University
2020-2025
Scripps Institution of Oceanography
2023-2025
University of California, San Diego
2023-2025
Box (United States)
2024
College of The Bahamas
2024
Demos
2024
Florida State University
2015-2020
FSU Coastal and Marine Laboratory
2016-2020
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...
Understanding the factors shaping patterns of ecological resilience is critical for mitigating loss global biodiversity. Throughout aquatic environments, highly mobile predators are thought to serve as important vectors energy between ecosystems thereby promoting stability and resilience. However, role these play in connecting food webs flow remains poorly understood most contexts. Using carbon nitrogen isotopes, we quantified use several prey resource pools (small oceanic forage, large...
ABSTRACT Bycatch is the greatest threat facing marine mammals globally. In United States (US), there have been significant efforts to reduce mammal bycatch in commercial fisheries, particularly through implementation of 1994 amendments Marine Mammal Protection Act. However, trends US fisheries not evaluated over a decade. We assessed for 130 stocks 51 species from 1990 2017 according taxon, region and gear type based on National Fisheries Service Stock Assessment Reports using metric...
Abstract Animal dietary information provides the foundation for understanding trophic relationships, which is essential ecosystem management. Yet, in marine systems, high‐resolution diet reconstruction tools are currently under‐developed. This particularly pertinent large vertebrates, direct foraging behaviour difficult or impossible to observe and, due their conservation status, collection of stomach contents at adequate sample sizes frequently impossible. Consequently, diets many groups,...
Abstract Chondrichthyan fishes are among the most threatened vertebrates on planet because many species have slow life histories that outpaced by intense fishing. The Western Central Atlantic Ocean, which includes Greater Caribbean, is a hotspot of chondrichthyan biodiversity and abundance, but has been characterized extensive shark ray fisheries lack sufficient data for effective management conservation. To inform future research decisions, we analysed patterns in extinction risk,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 582:147-161 (2017) - DOI: https://doi.org/10.3354/meps12334 Stress, post-release mortality, and recovery of commonly discarded deep-sea sharks caught on longlines Brendan Talwar1,2,*, Edward J. Brooks2, John W. Mandelman3, R. Dean Grubbs1 1Coastal Laboratory, Florida State University, St. Teresa, FL 32358,...
Per- and polyfluoroalkyl substances (PFAS) enter the marine food web, accumulate in organisms, potentially have adverse effects on predators consumers of seafood. However, evaluations PFAS meso-to-apex predators, like sharks, are scarce. This study investigated occurrence five shark species from two ecosystems with contrasting relative human population densities, New York Bight (NYB) coastal waters The Bahamas archipelago. total detected (∑PFAS) concentrations muscle tissue ranged 1.10 to 58.5 ng g
Some shark populations face declines owing to targeted capture and by-catch in longline fisheries. Exercise intensity during physiological status may be associated, which could inform management strategies aimed at reducing the impacts of on sharks. The purpose this study was characterize relationships between exercise longline-captured nurse sharks (Ginglymostoma cirratum) Caribbean reef (Carcharhinus perezi). quantified with digital cameras accelerometers, paired blood-based metrics from...
Near-future climate change projections predict an increase in sea surface temperature that is expected to have significant and rapid effects on marine ectotherms, potentially affecting a number of critical life processes. Some habitats also undergo more thermal variability than others, the inhabitants therefore must be tolerant acute periods extreme temperatures. Mitigation these outcomes may occur through acclimation, plasticity or adaptation, although rate extent species' ability adjust...
Few data are available on interspecific elasmobranch interactions during predation events. This report describes and discusses empirical from a single event in which four sharks (species: Carcharhinus leucas, Galeocerdo cuvier, Sphyrna mokarran perezi) competed for foraging opportunities fifth shark (C. caught an experimental longline. Analysis of video footage suggested competition was enforced without agonistic behaviour access to the resource not governed by size. The singularity set...
Abstract Mangrove creeks have a range of functional roles in tropical seascapes, but their use as feeding and refuge areas for commercially ecologically important transient predators is poorly understood. This study used video cameras to investigate the diurnal three Bahamian mangrove by during 2‐month period. More than 500 fishes from 10 species were recorded, including elasmobranchs, reef‐associated fishes, nearshore specialists. A multivariate analysis indicated that movement predator...
The isotopic composition of tooth-bound collagen has long been used to reconstruct dietary patterns animals in extant and palaeoecological systems. For sharks that replace teeth rapidly a conveyor-like system, stable isotopes tooth (δ13 CTeeth & δ15 NTeeth ) are poorly understood lacking ecological context relative other non-lethally sampled tissues. This tissue holds promise, because shark jaws may preserve chronologies from which infer individual-level across range temporal resolutions....
Abstract As on land, oceans exhibit high temporal and spatial temperature variation. This “ocean weather” contributes to the physiological ecological processes that ultimately determine patterns of species distribution abundance, yet is often unrecognized, especially in tropical oceans. Here, we tested paradigm stability shallow waters (<12.5 m) across different zones latitude. We collated hundreds situ, temporal-frequency ocean time series globally produce an intuitive measure...
Booralana nickorum sp. nov. is described from the deep-water slope of Exuma Sound, The Bahamas, depths 540 to 560 metres. It fourth species be assigned genus and second Western North Atlantic. can distinguished tricarinata Camp Heard, 1988 other by sub-triangular pleotelson uropodal exopod mature males being far longer than endopod, with both rami extending well beyond posterior margin pleotelson. Additionally, pleopods 3 4 lack a prominent angle at midpoint ramus.
ABSTRACT Prior to the Deepwater Horizon (DWH) oil spill, little research effort was focused on studying deep-sea sharks in Gulf of Mexico (GoM). While biology these fishes remains virtually unknown, they are routinely captured commercial fisheries as bycatch. In absence basic biological data, and with probability post-release survival unknown for most species, effective management plans cannot be formulated, making populations highly susceptible overfishing. Any potential detrimental effects...
Quantifying changes in blood chemistry elasmobranchs can provide insights into the physiological insults caused by anthropogenic stress, and ultimately inform conservation management strategies. Current methods for analysing elasmobranch field are often costly logistically challenging. We compared pH values measured using a portable, waterproof meter (Hanna Instruments HI 99161) with an i-STAT system (CG4+ cartridges), which was previously validated teleost fishes, to gauge accuracy of...
Abstract Fishes are often caught as bycatch on longlines and subsequently discarded. The behavioural response of fishes to longline capture is poorly understood, although it may be linked the magnitude physiological stress response, and, ultimately, contribute stress-induced mortality. We used accelerometers, video cameras, hook timers analyse 13 subtropical teleost elasmobranch species experimental in Bahamas. found that, across all groups, fight intensity during a event was best described...
Abstract Estimates of post-release mortality (PRM) rates for discarded bycatch are largely unknown across marine fisheries and represent a substantial source uncertainty when estimating total fishery mortality. One way to predict PRM is through the use reflex action predictors (RAMP), whereby presence or absence target reflexes known fate used create delayed model. We employed impairment assessments in concert with post-capture caging video monitoring 5-d deep-sea giant isopod Bathynomus...
Animal behavior varies in response to capture between/within species and fisheries, its expression may contribute incidental mortality when behaviors result physiological ramifications that cannot be resolved. However, this relationship between animal health is poorly understood, it remains a logistical challenge evaluate during capture. We describe an experimental technique characterizes quantifies hook-and-line fisheries. This includes (1) simultaneously monitoring the behavioral with...