A5009895846- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Marine and fisheries research
- Marine animal studies overview
- Fish Biology and Ecology Studies
- Coral and Marine Ecosystems Studies
- Fish biology, ecology, and behavior
- Physiological and biochemical adaptations
- Turtle Biology and Conservation
- Animal Vocal Communication and Behavior
- Identification and Quantification in Food
- Underwater Vehicles and Communication Systems
- Animal Behavior and Reproduction
- Aquaculture disease management and microbiota
- Underwater Acoustics Research
- Isotope Analysis in Ecology
- Species Distribution and Climate Change
- Water Quality Monitoring Technologies
- Foreign Body Medical Cases
- Parasite Biology and Host Interactions
- Evolutionary Psychology and Human Behavior
- Cephalopods and Marine Biology
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Hemostasis and retained surgical items
Massachusetts Maritime Academy
2016-2025
NOAA National Marine Fisheries Service
2000-2022
University of California, Los Angeles
2022
University of Delaware
2021
The Nature Conservancy
2020
Woods Hole Oceanographic Institution
2014
Martha's Vineyard Hospital
2003-2008
Commonwealth of Massachusetts
2001-2004
Twenty giant bluefin tuna were captured in September and October 1997 tagged released with pop-up satellite tags programmed to jettison from March through July, 1998. Seventeen successfully the fish (12 during known May-July spawning period), all of which located north 33°N latitude, a region mid-Atlantic bounded by Bermuda Azores. Our results argue for reconsideration current assumptions about North Atlantic migration patterns, mixing rates, areas, stock structure highlight need additional studies.
Abstract Sharks, tunas and billfishes are fished extensively throughout the world. Domestic international management measures (quotas, minimum sizes, bag limits) mandate release of a large, yet poorly quantified, number these fishes annually. Post‐release survivorship is difficult to evaluate, because standard methods not applicable large oceanic fishes. This paper presents information on current approaches characterising capture stress in sharks, marlins. To assess mortality associated with...
We conducted stable 13C and 15N analysis on white shark vertebrae demonstrated that incremental of isotopes along the radius a vertebral centrum produces chronological record dietary information, allowing for reconstruction an individual's trophic history. Isotopic data showed significant enrichments in with increasing sampling distance from center, indicating correlation between body size level. Additionally, isotopic values verified two distinct ontogenetic shifts shark: one following...
Mesoscale eddies are critical components of the ocean’s “internal weather” system. Mixing and stirring by exerts significant control on biogeochemical fluxes in open ocean, may trap distinctive plankton communities that remain coherent for months can be transported hundreds to thousands kilometers. Debate regarding how why predators use fronts eddies, example as a migratory cue, enhanced forage opportunities, or preferred thermal habitat, has been ongoing since 1950s. The influence behavior...
Significance Understanding the key drivers of animal movement is crucial to assist in mitigating adverse impacts anthropogenic activities on marine megafauna. We found that patterns megafauna are mostly independent their evolutionary histories, differing significantly from for terrestrial animals. detected a remarkable convergence distribution speed and turning angles across organisms ranging whales turtles (epitome slowest animals land but not at sea). Marine show prevalence dominated by...
Ecological connections between surface waters and the deep ocean remain poorly studied despite high biomass of fishes squids residing at depths beyond euphotic zone. These animals likely support pelagic food webs containing a suite predators that include commercially important marine mammals. Here we deploy pop-up satellite archival transmitting tags on 15 Chilean devil rays (Mobula tarapacana) in central North Atlantic Ocean, which provide movement patterns individuals for up to 9 months....
Despite recent advances in field research on white sharks (Carcharodon carcharias) several regions around the world, opportunistic capture and sighting records remain primary source of information this species northwest Atlantic Ocean (NWA). Previous studies using limited datasets have suggested a precipitous decline abundance from region, but considerable uncertainty these warrants additional investigation. This study builds upon previously published data combined with unpublished presents...
Inaccurate age estimates can have severe consequences in the management of elasmobranchs. Numerous studies shark validation demonstrated a disconnect between band pair counts and age, resulting underestimation, particularly older individuals. To investigate relationship pairs, vertebral shape growth, we quantified intracolumn differences centrum morphology (size structure) seven species: Squatina dumeril, Carcharodon carcharias, Lamna nasus, Isurus oxyrinchus, Alopias vulpinus, Prionace...
Significance Global vessel traffic is increasing alongside world economic growth. The potential for rising lethal ship strikes on endangered species of marine megafauna, such as the plankton-feeding whale shark, remains poorly understood since areas highest overlap are seldom determined across an entire range. Here we show how satellite tracking sharks and large movements globally provides a means to localize high-overlap determine collision risk changes in time. Our results point high...
Trophic positions (TP) were estimated for the blue shark ( Prionace glauca ), shortfin mako Isurus oxyrinchus thresher Alopias vulpinus and basking Cetorhinus maximus ) using stable isotope ratios of carbon (δ 13 C) nitrogen 15 N). The had lowest TP (3·1) δ N value (10·4‰), whereas highest values (4·5, 15·2‰). Mako sharks showed considerable variation in isotopic values, possibly due to foraging from both inshore offshore waters. Thresher significantly more enriched than sharks, suggesting a...
Conservation and management efforts for white sharks (Carcharodon carcharias) remain hampered by a lack of basic demographic information including age growth rates. Sharks are typically aged counting bands sequentially deposited in their vertebrae, but the assumption annual deposition these band pairs requires testing. We compared radiocarbon (Δ14C) values vertebrae from four female male northwestern Atlantic Ocean (NWA) with reference chronologies documenting marine uptake 14C produced...
Recent successful efforts to increase protection for manta rays has highlighted the lack of basic ecological information, including vertical and horizontal movement patterns, available these species. We deployed pop-up satellite archival transmitting tags on nine reef rays, Manta alfredi, determine diving behaviors habitat use. Transmitted archived data were obtained from seven tagged mantas over deployment periods 102–188 days, three recovered containing 2.6 million depth, temperature,...
White sharks, Carcharodon carcharias, are often described as elusive, with little information available due to the logistical difficulties of studying large marine predators that make long-distance migrations across ocean basins. Increased understanding aggregation patterns, combined recent advances in technology have, however, facilitated a new breadth studies revealing fresh insights into biology and ecology white sharks. Although we may no longer be able refer shark little-known, elusive...
Conservation efforts aimed at the whale shark, Rhincodon typus, remain limited by a lack of basic information on most aspects its ecology, including global population structure, sizes and movement patterns. Here we report movements 47 Red Sea sharks fitted with three types satellite transmitting tags from 2009–2011. Most these were tagged single aggregation site near Al-Lith, central coast Saudi Arabian Sea. Individuals encountered this all juveniles based size estimates ranging 2.5–7 m...