Thermopreference, tolerance and metabolic rate of early stages juvenile Octopus maya acclimated to different temperatures.
Thermopreference, tolerance and oxygen consumption rates of early juveniles Octopus maya (O. maya; weight range 0.38-0.78g) were determined after acclimating the octopuses to temperatures (18, 22, 26, and 30°C) for 20 days. The results indicated a direct relationship between preferred temperature (PT) and acclimated temperature, the PT was 23.4°C. Critical Thermal Maxima, (CTMax; 31.8±1.2, 32.7±0.9, 34.8±1.4 and 36.5±1.0) and Critical Thermal Minima, (CTMin; 11.6±0.2, 12.8±0.6, 13.7±1.0, 19.00±0.9) increased significantly (P<0.05) with increasing acclimation temperatures. The endpoint for CTMax was ink release and for CTMin was tentacles curled, respectively. A thermal tolerance polygon over the range of 18-30°C resulted in a calculated area of 210.0°C(2). The oxygen consumption rate increased significantly α=0.05 with increasing acclimation temperatures between 18 and 30°C. Maximum and minimum temperature quotients (Q10) were observed between 26-30°C and 22-26°C as 3.03 and 1.71, respectively. These results suggest that O. maya has an increased capability for adapting to moderate temperatures, and suggest increased culture potential in subtropical regions southeast of México.
Departamento de Biología, Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito exterior Cd. Universitaria, Mexico 04510.
Javier
J
Noyola
Claudia
C
Caamal-Monsreal
Fernando
F
Díaz
Denisse
D
Re
Adolfo
A
Sánchez
Carlos
C
Rosas
D000064:Acclimatization; D000367:Age Factors; D000818:Animals; D001481:Basal Metabolism; D009068:Movement; D049831:Octopodiformes / Q000378:metabolism / Q000502:physiology*; D010101:Oxygen Consumption; D013696:Temperature