Shark critical life stage vulnerability to monthly temperature variations under climate change.
Mar Environ Res
; 198: 106531, 2024 Jun.
Article
em En
| MEDLINE
| ID: mdl-38696933
ABSTRACT
In a 10-month experimental study, we assessed the combined impact of warming and acidification on critical life stages of small-spotted catshark (Scyliorhinus canicula). Using recently developed frameworks, we disentangled individual and group responses to two climate scenarios projected for 2100 (SSP2-4.5 Middle of the road and SSP5-8.5 Fossil-fueled Development). Seasonal temperature fluctuations revealed the acute vulnerability of embryos to summer temperatures, with hatching success ranging from 82% for the control and SSP2-4.5 treatments to only 11% for the SSP5-8.5 treatment. The death of embryos was preceded by distinct individual growth trajectories between the treatments, and also revealed inter-individual variations within treatments. Embryos with the lowest hatching success had lower yolk consumption rates, and growth rates associated with a lower energy assimilation, and almost all of them failed to transition to internal gills. Within 6 months after hatching, no additional mortality was observed due to cooler temperatures.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Tubarões
/
Temperatura
/
Mudança Climática
Limite:
Animals
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article