RT journal article
T1 Effects of temperature on embryonic development of Atlantic bluefin tuna (Thunnus thynnus, L 1758) and Atlantic bonito (Sarda sarda, Bloch 1793)
A1 Ortega, A.
A1 Reglero, P.
A1 de la Gándara, Fernando
A1 Mourente Cano, Gabriel
A1 Blanco, E.
A2 Biología
K1 Tuna
K1 Bonito
K1 Temperature
K1 Embryo
K1 Development
AB Temperature is the most important abiotic factor controlling the very early life of fish. Data on development,hatching, and survival responses of fertilized fish eggs to varying temperatures are essential to understand fitnessof Atlantic bluefin tuna (ABFT) and Atlantic bonito (AB). In this study, we investigated i) the effect of tem-perature on viable hatching rate and ii) the relationship between temperature and the timing necessary to reachdifferent developmental stages. Our findings show that the thermal range for viable egg hatching is colder in ABthan in ABFT. ABFT eggs hatch from 18 to 33 ºC, highest around 26–27 ºC; below 21 ºC or above 30 ºC at least50 % of the hatched larvae were abnormal, while below 19 ºC and above 32 ºC the larvae had no chance tosurvive, having highest survival chance at around 26 ºC. In AB, eggs hatched from 16 ºC to 28 ºC, being optimalaround 21–22 ºC, the incidence of abnormal larvae was very high above 27 ºC and at 16.5 ºC, and larvae had nochance to survive above 28 ºC and had the highest survival chance at around 21 ºC. ABFT eggs required longertimes to hatch than other tuna species. The results obtained in this study are an important tool for aquaculture;here, we describe the best temperature conditions for successful and viable hatching in ABFT and AB, which mayhelp to improve modelling tools and to develop better indices of annual recruitment and the possible impact offuture global temperature changes.
PB Elsevier B.V.
SN 0165-7836
YR 2024
FD 2024
LK http://hdl.handle.net/10498/33641
UL http://hdl.handle.net/10498/33641
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026