James A. Sulikowski

The Red Sea's largest coastal lagoon is a reproductive site for endangered whiprays and guitarfish

Ashlie J. McIvor, James A. Sulikowski, Eloise B Richardson, Ahmed Alansari et autres

Safeguarding reproductive habitats can be crucial to sustaining batoid populations, yet such areas remain poorly documented, particularly in the Red Sea. This study used ultrasonography to assess seasonal patterns of pregnancy in 2 threatened batoids, the halavi guitarfish Glaucostegus halavi (Critically Endangered) …

First reported evidence of healing after a traumatic mandibular fracture with associated soft‐tissue avulsion in the deep‐sea sevengill shark ( Heptranchias perlo )

Andrej A. Gajić, James A. Sulikowski, Jodie L. Rummer, Joel Harrison Gayford et autres

This study presents the first documented case of healing in the deep-sea sharpnose sevengill shark (Heptranchias perlo), a poorly understood species in the Mediterranean Sea. A juvenile specimen that sustained a traumatic mandibular fracture with extensive soft-tissue avulsion, which likely resulted from …

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First insights into the fine-scale vertical movements of a Carolina hammerhead, Sphyrna gilberti, and a hybrid between Carolina and scalloped hammerhead

Lauren Horstmyer, Kirsty L. Ballard, Toby S. Daly‐Engel, Eric R. Hoffmayer et autres

Satellite telemetry has enabled the tracking of marine predators’ vertical and horizontal habitat use and migration patterns. These insights provide valuable information that inform management and conservation of threatened species. In this study, a scalloped hammerhead, Sphyrna lewini, (125 cm FL; immature …

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Bycatch survival of shortfin mako sharks (Isurus oxyrinchus) in the U.S. Atlantic pelagic longline fishery

Mischa Schultz, Eric R. Hoffmayer, James A. Sulikowski, Michael E. Byrne

Severe population declines of shortfin mako sharks (Isurus oxyrinchus) in the Atlantic Ocean have led to the implementation of conservation measures, notably fishing retention bans and live-release regulations, aimed at substantially reducing fishing mortality to allow stock recovery. While retention bans can …

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Life stage and seasonal habitat use of the porbeagle Lamna nasus in the Northwest Atlantic Ocean

Brooke N. Anderson, Neil Hammerschlag, Steven E. Saul, Jon F. Dodd et autres

For highly mobile marine species such as pelagic elasmobranchs, the development of effective spatial management requires a comprehensive understanding of movement ecology. Research incorporating movement data across seasons and life stages, including reproductive states, is valuable for informing spatial management, yet is …

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Migratory patterns and seasonal habitat use of great hammerhead sharks (Sphyrna mokarran) in the southeastern United States

Grace A. Casselberry, Gregory B. Skomal, Lucas P. Griffin, Jacob W. Brownscombe et autres

The great hammerhead shark (Sphyrna mokarran) is a highly mobile shark species whose population in the United States declined dramatically through the early 2000s. Their spatial ecology is poorly understood, creating challenges for effective conservation of this enigmatic marine predator. Using acoustic …

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Catch Data Can Unravel Elasmobranch Aggregation Dynamics and Group Behaviours

Alexandra G. McInturf, Maurício Cantor, Ian A. Bouyoucos, Taylor K. Chapple et autres

ABSTRACT Elasmobranchs (i.e., sharks, skates, rays), known for their cognitive abilities and complex behaviours, often form aggregations that are thought to be crucial for their survival and evolutionary success. However, understanding the drivers behind these aggregations remains challenging due to the dynamism …

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Early insights into the seasonal and spatial distribution of white sharks (Carcharodon carcharias) along the Maine coastline

Matthew M. Davis, Megan V. Winton, John A. Mohan, Joseph Iafrate et autres

While significant progress has been made to characterize life history patterns, movement ecology, and regional estimates of abundance of white sharks (Carcharodon carcharias) in the Western North Atlantic (WNA), patterns of spatial distribution remain relatively unknown in the northern Gulf of Maine. …

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Identification of the first gestational ground for tiger sharks (Galeocerdo cuvier) in the Central Indian Ocean using a high-definition submersible ultrasound

James A. Sulikowski, Nathan Perisic, Arzucan Askin, Lennart Vossgaetter et autres

The reproductive state of wild, free-swimming tiger sharks (Galeocerdo cuvier), was assessed using underwater ultrasonography at a diving site in Fuvahmulah, a Maldivian atoll within the central Indian Ocean. The presence of embryos were observed in 93% of the adult sharks (26/28) …

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First evidence of predation on an adult porbeagle equipped with a pop-off satellite archival tag in the Northwest Atlantic

Brooke N. Anderson, Lauren Horstmyer, Kirsty L. Ballard, Jon F. Dodd et autres

Pop-off satellite archival tags (PSATs) have been increasingly deployed on marine megafauna to remotely monitor their movements, behavior, and environmental preferences. These tags have also allowed the occasional novel documentation of ecological interactions, such as predation on tagged animals. A PSAT deployed …

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First insights into the vertical habitat use of young porbeagles in the north-western Atlantic with implications for bycatch reduction strategies

Brooke N. Anderson, Heather D. Bowlby, Steven E. Saul, Yun Hee Kang et autres

Context For threatened marine species, data on their vertical habitat use patterns can reveal risk of interactions with fishing gear and can inform bycatch avoidance strategies. Such data are lacking for young porbeagles (Lamna nasus), which are captured as bycatch in north-western …

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Lectin binding to pectoral fin of neonate little skates reared under ambient and projected‐end‐of‐century temperature regimes

Peyton A. Thomas, Emily E. Peele, Kara E. Yopak, James A. Sulikowski et autres

The glycosylation of macromolecules can vary both among tissue structural components and by adverse conditions, potentially providing an alternative marker of stress in organisms. Lectins are proteins that bind carbohydrate moieties and lectin histochemistry is a common method to visualize microstructures in …

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