Survie des tortues caouannes juvéniles (Caretta caretta) remises à l'eau après leur capture accidentelle dans le cadre de la pêche à la palangre pélagique menée dans les eaux canadiennes de l'Atlantique, Canada
- Language of the publication
- French
- Date
- 2024
- Type
- Report
- Author(s)
- Secrétariat canadien des avis scientifiques
- Canada. Ministère des pêches et des océans. Région des Maritimes
- Publisher
- Centre des avis scientifiques (CAS), Région des Maritimes, Pêches et Océans Canada, Institut océanographique Bedford
Alternative title
Survie des tortues caouannes juvéniles capturées dans le cadre de la pêche à la palangre pélagique dans les eaux canadiennes de l’Atlantique
Survie des tortues caouannes juvéniles (Caretta caretta) remises à l’eau après leur capture accidentelle dans le cadre de la pêche à la palangre pélagique dans les eaux canadiennes de l’Atlantique, Canada
Abstract
Estimating post-release survival is essential to understand how bycatch may impact sea turtle populations. Pelagic longline gear is the only documented source of anthropogenic harm and mortality to Loggerhead Sea Turtles in Atlantic Canadian waters. Mortality affecting juvenile Loggerhead Sea Turtles in Atlantic Canadian waters may ultimately translate to population-level impacts for the Loggerhead Sea Turtle population in the northwest Atlantic. Pop-up satellite archival tags (PSATs) were attached to 62 juvenile Loggerhead Sea Turtles incidentally hooked by Atlantic Canadian pelagic longline gear (2012–2018) to estimate associated post-release survival. Analysis of diving behaviour, ocean temperature, and ambient light level was used to assign fates to hooked Loggerhead Sea Turtles. Application of the Kaplan-Meier estimator with right censoring indicated that the annual probability of an individual hooked Loggerhead surviving post-release was 87.7%. There was no significant difference in probability of survival between shallow-hooked and deep-hooked Loggerhead Sea Turtles. PSATs are valuable tools to investigate post-release survival of a variety of marine animals, however, there are some limitations associated with tag performance and acquisition of tag data via satellite.
Description
1 online resource (22 pages) : maps, charts, photographs
Subject
- Nature and environment,
- Water
Pagination
22 pages
Identifiers
- Government document number
- Fs70-6/2024-011F-PDF
- ISBN
- 9780660701134
- ISSN
- 1919-5117
Report
Relation
- Is translation of:
- https://open-science.canada.ca/handle/123456789/2082
Citation(s)
MPO. 2024. Survie des tortues caouannes juvéniles (Caretta caretta) remises à l’eau après leur capture accidentelle dans le cadre de la pêche à la palangre pélagique dans les eaux canadiennes de l’Atlantique, Canada. Secr. can. des avis sci. du MPO. Avis. sci. 2024/011.