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- Title
Thermal preference and tolerance of green abalone Haliotis fulgens (Philippi, 1845) and pink abalone Haliotis corrugata (Gray, 1828).
- Authors
Díaz, Fernando; Re, Ana Denisse; Medina, Zarina; Re, Gerardo; Valdez, Gustavo; Valenzuela, Francisco
- Abstract
The thermoregulatory behaviour of green abalone Haliotis fulgens and pink abalone H. corrugata was investigated. Haliotis fulgens juveniles ranging in wet weight from 3.0 to 3.3 g and from 28.7 to 30.5 mm shell length and of H. corrugata 2.0 g and 25.7 mm in shell length were exposed to 19°C for 30 days in a flow-through water system. Temperature preference was determined in a horizontal thermal gradient and was found to be 25.4°C for green abalone and 25.0°C for pink abalone. Displacement velocity was 4.3 cm h−1 for H. fulgens and 12.8 cm h−1 for H. corrugata. The optimum temperature for growth calculated for both abalone species was 24.6 and 24.5°C respectively. The critical thermal maxima (CTMax) of H. fulgens and H. corrugata were determined as a measure of thermal tolerance. Abalones were subjected to increasing water temperatures at a rate of 1°C on 30 min until they detached from the substrate. The CTMax at 50% were 33.6 and 32.0°C for green and pink abalone respectively. The results are discussed in relation to site selection and commercial rearing.
- Subjects
HALIOTIS fulgens; ABALONES; ARCHAEOGASTROPODA; PROSOBRANCHIA; TEMPERATURE; BODY temperature regulation; GASTROPODA; MOLLUSKS; INVERTEBRATES
- Publication
Aquaculture Research, 2006, Vol 37, Issue 9, p877
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/j.1365-2109.2006.01506.x