Quantifying the behavioural consequences of shark ecotourism

Autor: Joel H. Gayford, William D. Pearse, Rafael De La Parra Venegas, Darren A. Whitehead

Publikováno v: Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)

Abstract Shark populations globally are facing catastrophic declines. Ecotourism has been posited as a potential solution to many of the issues facing shark conservation, yet increasingly studies suggest that such activity may negatively influence as

Externí odkaz: https://doaj.org/article/d75bf0e04e3a47f2b90bc8fafaa1565e

First description of a sex segregated aggregation of silky sharks (Carcharhinus falciformis) and the frequency and distribution of mating wounds off the tip of the Baja California Peninsula

Autor: Darren A. Whitehead, Joel H. Gayford, Edgar Mauricio Hoyos, Nikolai Madland Shorter, Felipe Galván-Magaña, James T. Ketchum

Publikováno v: Environmental Biology of Fishes. 105:953-960

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aed2b37fa38da0e274b28a7571dfcf1d
https://doi.org/10.1007/s10641-022-01297-7

The selective drivers of allometry in sharks (Chondrichthyes: Elasmobranchii)

Autor: Joel H Gayford, Darren A Whitehead, James T Ketchum, Daniel J Field

In addition to the selective importance of interspecific morphological variation, ontogenetic morphological variation may reflect different selective regimes to which successive developmental stages are subjected. The typical body form of carcharhini

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01542580a79f7928d8135885373d14f6
https://zenodo.org/record/7926996

Aerial photogrammetry of whale sharks (Rhincodon typus) in the Bay of La Paz, using an unoccupied aerial vehicle

Autor: Darren A. Whitehead, Kathryn A. Ayres, Joel H. Gayford, James T. Ketchum, Felipe Galván-Magana, Fredrik Christiansen

Publikováno v: Whitehead, D A, Ayres, K A, Gayford, J H, Ketchum, J T, Galván-Magana, F & Christiansen, F 2022, ' Aerial photogrammetry of whale sharks (Rhincodon typus) in the Bay of La Paz, using an unoccupied aerial vehicle ', Marine Biology, vol. 169, no. 7, 94 . https://doi.org/10.1007/s00227-022-04085-0

Measurements obtained from aerial imagery can be used to calculate body shape, condition and growth rates of large surface-associated marine megafauna. In this study, an unoccupied aerial vehicle (UAV) was used to obtain aerial images of an elasmobra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::473f94ed77fd5a0d9a401a0739add8fb
https://doi.org/10.1007/s00227-022-04085-0

Concentrations of Silver, Chrome, Manganese and Nickel in Two Stranded Whale Sharks (Rhincodon typus) from the Gulf of California

Autor: Abraham Vázquez-Haikin, Edgar E. Becerril-García, Rogelio González-Armas, Federico Páez-Osuna, Francesca Pancaldi, Felipe Galván-Magaña, Martín F. Soto-Jiménez, Darren A. Whitehead

Publikováno v: Bulletin of Environmental Contamination and Toxicology. 107:827-832

Concentrations of Ag, Cr, Mn and Ni were measured in tissues of two whale sharks (Rhincodon typus) stranded in La Paz Bay (LAP) and Punta Bufeo (PB), Gulf of California, during 2017 and 2018. The concentration range of Ni (0.012-1.12 µg/g ww) and Cr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd33915f8b8d30133936009a1707592f
https://doi.org/10.1007/s00128-021-03244-1