Your browser doesn't support javascript.
loading
Long-term effects of climate change on juvenile bull shark migratory patterns.
Matich, Philip; Plumlee, Jeffrey D; Bubley, Walter; Curtis, Tobey H; Drymon, J Marcus; Mullins, Lindsay L; Shipley, Oliver N; TinHan, Thomas C; Fisher, Mark R.
Afiliación
  • Matich P; Saving the Blue, Cooper City, Florida, USA.
  • Plumlee JD; Marine Biology Department, Texas A&M University Galveston, Galveston, Texas, USA.
  • Bubley W; School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA.
  • Curtis TH; Marine Resources Division, South Carolina Department of Natural Resources, Charleston, South Carolina, USA.
  • Drymon JM; Atlantic Highly Migratory Species Management Division, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Gloucester, Massachusetts, USA.
  • Mullins LL; Coastal Research and Extension Center, Mississippi State University, Biloxi, Mississippi, USA.
  • Shipley ON; Mississippi-Alabama Sea Grant Consortium, Ocean Springs, Mississippi, USA.
  • TinHan TC; Coastal Research and Extension Center, Mississippi State University, Biloxi, Mississippi, USA.
  • Fisher MR; Northern Gulf Institute, Starkville, Mississippi, USA.
J Anim Ecol ; 93(10): 1445-1461, 2024 Oct.
Article en En | MEDLINE | ID: mdl-39016072
ABSTRACT
Seasonal variability in environmental conditions is a strong determinant of animal migrations, but warming temperatures associated with climate change are anticipated to alter this phenomenon with unknown consequences. We used a 40-year fishery-independent survey to assess how a changing climate has altered the migration timing, duration and first-year survival of juvenile bull sharks (Carcharhinus leucas). From 1982 to 2021, estuaries in the western Gulf of Mexico (Texas) experienced a mean increase of 1.55°C in autumn water temperatures, and delays in autumn cold fronts by ca. 0.5 days per year. Bull shark migrations in more northern estuaries concomitantly changed, with departures 25-36 days later in 2021 than in 1982. Later, migrations resulted in reduced overwintering durations by up to 81 days, and the relative abundance of post-overwintering age 0-1 sharks increased by >50% during the 40-year study period. Yet, reductions in prey availability were the most influential factor delaying migrations. Juvenile sharks remained in natal estuaries longer when prey were less abundant. Long-term declines in prey reportedly occurred due to reduced spawning success associated with climate change based on published reports. Consequently, warming waters likely enabled and indirectly caused the observed changes in shark migratory behaviour. As water temperatures continue to rise, bull sharks in the north-western Gulf of Mexico could forgo their winter migrations in the next 50-100 years based on current trends and physiological limits, thereby altering their ecological roles in estuarine ecosystems and recruitment into the adult population. It is unclear if estuarine food webs will be able to support changing residency patterns as climate change affects the spawning success of forage species. We expect these trends are not unique to the western Gulf of Mexico or bull sharks, and migratory patterns of predators in subtropical latitudes are similarly changing at a global scale.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estaciones del Año / Tiburones / Cambio Climático / Migración Animal Límite: Animals Idioma: En Revista: J Anim Ecol Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estaciones del Año / Tiburones / Cambio Climático / Migración Animal Límite: Animals Idioma: En Revista: J Anim Ecol Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido