Thermal response of demersal and pelagic juvenile fishes from the surf zone during a heat‐wave simulation

• DOI: 10.1111/jai.13970
• Publication Date: 2019-09-17T05:15:00Z
• Authors: Eidi Kikuchi; Fernando Rafael D...; Rafael Mendonça D...; Teodoro Vaske‐Júnior
• Keywords: Demersal zone; Demersal fish; Critical thermal maximum; Surf zone

Experimental measurements were collected in the laboratory to evaluate maximum thermal limit and plasticity of Neotropical juvenile fish with different life habitats (demersal pelagic) from surf zone response a “heat-wave experiment”. Trials conducted using two temperature acclimations (Ta), including current average Southeastern Brazil (Ta: 14 days at 25°C) experiment” 30°C), simulating heat-wave event that occurs when daily more than five consecutive exceeds by 5°C. Typical species used: demersal White sea catfish (Genidens barbus) Gulf kingcroaker (Menticirrhus littoralis), pelagic fishes Great pompano (Trachinotus goodei) Long-fin mullet (Mugil brevirostris). The range values for both life-habitats verified through acclimation. tolerance high temperatures (CTmax) these differed between Ta, habitat species. Fish showed species-specific increase, regardless their even under similar abiotic conditions. However, simulation, presented greater relation fish. Despite higher exposed all displayed lower edge safety is markedly close limits.