Premium
Thermal sensitivity of native and invasive seabreams
Author(s) -
Vinagre Catarina,
Narciso Luís,
Cabral Henrique N.,
Costa Maria J.,
Rosa Rui
Publication year - 2014
Publication title -
marine ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 58
eISSN - 1439-0485
pISSN - 0173-9565
DOI - 10.1111/maec.12080
Subject(s) - diplodus , range (aeronautics) , biology , habitat , estuary , ecology , species distribution , zoology , mediterranean climate , materials science , composite material
This study compared the mortality and metabolic response of the S enegal seabream, D iplodus bellottii , an A frican species recently reported in S outhern E urope and the white seabream D iplodus sargus , a native species, across a range of temperatures. The temperatures tested were 18, 26, 28 and 30 °C. Mortality was zero at 18 °C and very low at all other temperatures for both species, with the exception of D. bellottii, which experienced 32% mortality at 30 °C. Metabolic rates increased steadily with increasing temperatures, with a steep increase at 30 °C for D. bellottii . Thermal sensitivity ranged between 2 and 3 for both species and for all thermal intervals, with the exception of the thermal sensitivity between 28 and 30 °C for D. bellottii , which was 7. It was concluded that D. bellottii is under thermal stress at 30 °C. Diplodus bellottii may have expanded its distribution northwards due to an increase in sea surface temperatures. However, further warming may result in habitat loss for the juveniles, since S outhern E uropean estuarine systems will reach temperatures that may lead to lower fitness in juveniles of this species.