Temperature preference and oxygen consumption of the largemouth bass Micropterus salmoides (Lacépède) acclimated to different temperatures |
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Authors: | Fernando Dí az,Ana Denisse Re,Ricardo A Gonzá lez,L Noemi Sá nchez,Gustavo Leyva,& Francisco Valenzuela |
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Affiliation: | Laboratorio de Ecofisiología de Organismos Acuáticos, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada Baja California, México; Instituto Tecnológico de Sonora (ITSON), Obregón, Sonora, México; Departamento de Acuicultura, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada Baja California, México |
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Abstract: | The behavioural and metabolic responses of the largemouth bass Micropterus salmoides (Lacépède) to temperature were determined to define optimal thermal conditions. The final preferendum of largemouth bass juveniles determined with acute and gravitation methods was independent of the method (29.0–28.1 °C). The displacement velocity in the horizontal thermal gradient of bass juveniles was 22.4 cm h−1 in the light phase and 22.6 cm h−1 in the dark phase. Oxygen consumption rates in the largemouth bass increased significantly (P<0.05) from 48.8 to 69.4 mg O2 Kg−1 h−1 with an increase in the acclimation temperature from 20 to 33 °C. The temperature quotient (Q10) in the juveniles was 1.37–2.00 in the range of acclimation temperatures of 26–29 and 29–32 °C. The optimum temperature range for growth calculated using Jobling's equation was 28.1–28.6 °C and for Q10 values 26–29 °C. The results are discussed in relation to the use of this information in aquaculture. |
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Keywords: | preferred temperature oxygen consumption rate acclimation temperature Micropterus salmoides |
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