Thermal preference, tolerance and temperature-dependent respiration in the California sea hare <i>Aplysia californica</i>

• 作者: Adolfo Sánchez Zamora Alexei Licea-Navarro Alfredo Salas-Garza Ana Denisse Re Clara E. Galindo-Sanchez Edna Sanchez-Castrejon Fernando Díaz Marco Gonzalez Victor Cordero
• 来源期刊: 农业科学(英文)
• 学科: 医学
• 关键词: Thermoregulatory Behavior CTMAX Oxygen Consumption APLYSIA californica
• 年，卷（期）: 2013,（6）
• 页码范围: 46-52
• 页数: 7页
• 分类号: R73

摘要

The thermoregulatory behavior of sea hare Aplysia californica was determined in a horizontal thermal gradient;with a preferred temperature (PT) of 18.3°C for the day cycle and 20.8°C for the night cycle. The displacement velocity demonstrated an initial rate of 30 cm·hˉ1 and gradually the velocity diminished to 18 cm·hˉ1 with several fluctuations mainly at 02:00 am. Critical Temperature Maxima (CTMax refers to the temperature point where at least 50% of the experimental group have a loss of attachment) was measured at three acclimation temperatures (16°C, 19°C and 22°C). At the lowest acclimation temperature (16°C), 50% of the experimental group had an attachment loss at CTMax 32.7°C, and in a higher acclimation temperature (22°C) CTMax was 36.2°C. The Oxygen Consumption Rate (OCR) was closely correlated to acclimation temperature, and at 16°C and 19°C sea hare had a relatively stable metabolic rate, with OCR increasing to 9 mg O2 hˉ1·kgˉ1 w.w. in a higher acclimation temperature.