Estimated life-history traits and movements of the Caribbean reef shark (Carcharhinus perezi) in The Bahamas based on tag-recapture data

Talwar, Brendan S.; Bradley, Darcy; Berry, C. P. L.; Bond, Mark E.; Bouyoucos, Ian A.; Brooks, Annabelle; Fields, Candace Y. A.; Gallagher, Austin J.; Guttridge, Tristan L.; Guttridge, Annie E.; Hammerschlag, Neil; Hamilton, Ian; Keller, Bryan A.; Kessel, Steven T.; Matich, Philip; O’Shea, Owen R.; Papastamatiou, Yannis P.; Raguse, Cameron; Schneider, Eric V. C.; Shipley, Oliver N.; Smukall, Matthew J.; Bergmann, Maurits P. M. van Zinnicq; Brooks, Edward J.

doi:10.1007/s00227-022-04044-9

Cited by 8 publications

(13 citation statements)

References 103 publications

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“…Using the hand-line that was still hooked in the shark’s mouth as well as the rope around the caudal fin, it was possible to keep the shark stable and immobile. During this time, total length (TL; snout to tip of caudal fin) of the shark was measured using a flexible tape measure [ 47 , 48 ]. The shark was released within 10 min after capture by cutting the hook and releasing the noose around the caudal fin.…”

Section: Methodsmentioning

confidence: 99%

Design and fabrication of a stereo-video camera equipped unoccupied aerial vehicle for measuring sea turtles, sharks, and other marine fauna

Piacenza

Faller

et al. 2022

PLoS ONE

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The recent commercialization of unoccupied aerial vehicles (UAVs) has facilitated their incorporation into a variety of ecological studies. While UAVs are able to provide accurate visual data of marine species from an aerial perspective, these devices have some limitations that make measuring marine animals below the surface challenging. Many marine organisms are often visible from the air, but are deeper in the water column, and current methods cannot measure animals below the surface. Here, we developed and tested a stereo-video camera (SVC) system that was mounted onto a commercially-available UAV. We used the SVC-UAV to conduct remote body-size measurements for two marine species: the green sea turtle (Chelonia mydas) and the nurse shark (Ginglymostoma cirratum). When comparing SVC measurements to those taken by hand, the SVC-UAV had a mean absolute error (MAE) of 4.44 cm (n = 6; mean percent error (MPE) = 10.6%) for green sea turtles and 7.16 cm absolute error (n = 1; PE = 3.6%) for the nurse shark. Using a linear model, we estimated the slope of the SVC versus hand measurements for green sea turtles to be 1.085 (±0.099 SE), and accounting for the standard error, a measurement bias was not apparent. Using model selection, based on a global model predicting MAE from animal distance to the SVC and body size, the top ranked model was the intercept-only model. This indicates that neither animal distance nor body size strongly influenced measurement error. Incorporating SVC systems into UAVs can allow for relatively accurate measurements of near surface-dwelling marine species. To our knowledge, there is no other stand-alone SVC for UAVs available that offers similar accuracy and utility.

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Section: Methodsmentioning

confidence: 99%

Design and fabrication of a stereo-video camera equipped unoccupied aerial vehicle for measuring sea turtles, sharks, and other marine fauna

Piacenza

Faller

et al. 2022

PLoS ONE

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“…Rangel, unpubl. data), and from June to November in the Caribbean, Northern Hemisphere (Talwar et al ., 2022; Tavares, 2009). Fresh mating wounds observed in the population from the Caribbean suggest that the mating period occurs mainly during the summer (Talwar et al ., 2022).…”

Section: Figurementioning

confidence: 99%

“…The Caribbean reef shark ( Carcharhinus perezi ) is one of the most abundant reef‐associated sharks found throughout the western Atlantic Ocean from North Carolina (United States of America) to Brazil (Carlson et al ., 2021). Due to the historic fishing pressure and to its life‐history traits ( e.g ., relatively restricted distribution, habitat specialization and reproductive biology; Ebert et al ., 2021; Talwar et al ., 2022), the species has been recently listed as Endangered by the IUCN (Carlson et al ., 2021) and listed as Vulnerable by Brazil's National Red List (Ordinance no. 148 Ministério do Meio Ambiente, 2022).…”

Section: Figurementioning

confidence: 99%

“…Based on the movement patterns of the Caribbean reef shark, which exhibit year‐round residency at relatively small spatial scales throughout its southern distribution ( e.g ., Baremore et al ., 2021; Gallagher et al ., 2021; Garla et al ., 2006a, 2006b; Talwar et al ., 2022), it was expected that its entire life cycle, including reproductive process ( i.e ., copulation, gestation and parturition), would occur within the Fernando de Noronha Archipelago. Nonetheless, empirical evidence of all stages of the reproductive cycle is yet to be found.…”

Section: Figurementioning

confidence: 99%

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Female wound records suggest mating periods for the Caribbean reef shark at an insular marine protected area from the Equatorial Atlantic Ocean

Rangel

Afonso

Garla

2022

Journal of Fish Biology

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Despite being one of the most abundant, economically significant, reef-associated shark species, little is known about the reproductive aspects of the Caribbean reef shark (Carcharhinus perezi). In the present study the authors report the first evidence of mating wounds and scars in female Caribbean reef sharks at the Fernando de Noronha Archipelago, a remote marine protected area in the South Atlantic Ocean. Data from four females suggest this species mates mainly during the austral summer, between February and March. Given that the archipelago has been previously described as a nursery ground for the Caribbean reef shark, these results add information about the reproductive cycle of this species in the equatorial Atlantic Ocean.

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“…Understanding the reproductive biology of large marine predators, such as sharks, is important for establishing effective conservation. Specifically, data on maturity state, gestation period, breeding frequency, and fecundity are needed for generating accurate population models and determining when a population is overexploited ( 1 , 2 ). Moreover, understanding these reproductive characteristics is necessary for establishing effective site-based management strategies, such as marine protected areas or time/area closures to safeguard key life-history stages ( 3 ).…”

Section: Introductionmentioning

confidence: 99%

A novel intrauterine satellite transmitter to identify parturition in large sharks

Sulikowski

Hammerschlag

2023

Sci. Adv.

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Determining where and when animals give birth is critical for establishing effective conservation management that protects vulnerable life stages (e.g., pregnant females and newborns) and places (e.g., nursery grounds). To date, this information has been elusive in the case of highly migratory sharks in the wild. Here, we report on the deployment a of novel intrauterine satellite tag implanted in two highly mobile apex predators, the tiger shark ( Galeocerdo cuvier ) and the scalloped hammerhead ( Sphyrna lewini ), that remotely documented the location and timing of birth by a highly migratory oceanic animal in the wild. This novel technology will be especially valuable for the protection of threatened and endangered shark species, where protection of pupping and nursery grounds is a conservation priority.

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Estimated life-history traits and movements of the Caribbean reef shark (Carcharhinus perezi) in The Bahamas based on tag-recapture data

Cited by 8 publications

References 103 publications

Design and fabrication of a stereo-video camera equipped unoccupied aerial vehicle for measuring sea turtles, sharks, and other marine fauna

Design and fabrication of a stereo-video camera equipped unoccupied aerial vehicle for measuring sea turtles, sharks, and other marine fauna

Female wound records suggest mating periods for the Caribbean reef shark at an insular marine protected area from the Equatorial Atlantic Ocean

A novel intrauterine satellite transmitter to identify parturition in large sharks

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