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Oxygen Consumption Response to Gradual Hypoxia in Spider Crab, Maja brachydactyla: Critical and Lethal Oxygen Saturations and Recovery Ability

Authors :
Benjamín García García
Felipe Aguado-Giménez
M.D. Hernández
Jesús Cerezo Valverde
Source :
Journal of the World Aquaculture Society. 43:433-441
Publication Year :
2012
Publisher :
Wiley, 2012.

Abstract

Spider crab, Maja brachydactyla, is a crustacean with interesting biological characteristics for intensive aquaculture. However, physiological studies are needed to establish the optimal conditions for its culture and maintenance. We analyzed the oxygen consumption response of spider crab to gradual hypoxia in relation to animal weight (W: 0.42–1.62 kg) and water temperature (T: 17.8–26.3 C), along with its ability to recover. Spider crab behaved as an oxygen regulator, maintaining its oxygen consumption constant until it reached critical oxygen saturation. This value varied between 24.1 and 53.3% oxygen saturation (42.4 ± 7.4% Sat.; 2.95 ± 0.43 mgO2/L), and significantly depended on the temperature (P < 0.01). The lethal oxygen saturation varied from 6.8 to 19.3% Sat. (12.57 ± 4.25% Sat.; 0.88 ± 0.29 mgO2/L) depending on temperature and body weight (P < 0.05). When oxygen levels were re-established after exposure to acute hypoxia, the animals recovered, oxygen consumption remaining above the routine value for up to 15–20 h. We suggest survival oxygen saturation levels for spider crab of between 100 and 65% in the experimental conditions of this study.

Details

ISSN :
08938849
Volume :
43
Database :
OpenAIRE
Journal :
Journal of the World Aquaculture Society
Accession number :
edsair.doi...........1ba9084ced04b3554a0376a799813fd2
Full Text :
https://doi.org/10.1111/j.1749-7345.2012.00564.x