Behavioral thermoregulation and critical thermal limits of giant keyhole limpet Megathura crenulata(Sowerby 1825) (Mollusca; Vetigastropoda). (December 2015)

• Record Type: Journal Article
• Authors: Díaz, Fernando; Denisse Re, Ana; Salas, Alfredo; Galindo-Sanchez, Clara E.; Gonzalez, Marco A.; Sanchez, Adolfo; Rosas, Carlos
• Is Part Of: Journal of thermal biology. Volume 54(2015)
• Page Start: 133
• Page End: 138
• Publication Date: 2015-12
• Subjects: Preferred temperature -- Critical thermal maxima -- Gastropod; Thermobiology -- Periodicals; Temperature -- Periodicals; Biology -- Periodicals; Thermobiologie -- Périodiques; Thermobiology; Periodicals; 571.46
• DOI: 10.1016/j.jtherbio.2013.05.007
• Languages: English
• ISSNs: 0306-4565

Abstract

Abstract: The thermoregulatory behavior of the giant keyhole limpet Megathura crenulata was determined in a horizontal thermal gradient during the day at 18.9 °C and 18.3 °C for the night. The final preferendum determined for giant keyhole limpets was of 18.6±1.2 °C. Limpets' displacement velocity was 10.0±3.9 cm h −1 during the light phase and 8.4±1.6 cm h −1 during the dark phase. The thermotolerance (measured as CTMax at 50%) was determined in a keyhole limpet in three acclimation temperatures 17, 20, and 23 °C. Limpets were subjected to water increasing temperatures at a rate of 1 °C every 30 min, until they detached from the substrate. The critical thermal maximum at 50% was 27.2, 27.9 and 28.3 °C respectively. Highlights: We obtained a preferred temperature for M. crenulata of 18.6±1.2 °C. Displacement velocity of limpets diminished from 46.0 to 17.9 cm h −1 once the organisms located the preferred temperature. The CTMax, at 50% was 27.2, 27.9 and 28.3 °C for organisms acclimated at different temperatures.