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Article: Effect of three photoperiod regimes on the growth and mortality of the Japanese abalone Haliotis discus hannai Ino.(Report)
- Article from:
- Journal of Shellfish Research
- Article date:
- September 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 National Shellfisheries Association, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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ABSTRACT Feeding activity of the Japanese abalone Haliotis discus hannai is clearly diurnal, with an increase in feeding between the onset of darkness and midnight. The feeding rate increases slowly in the afternoon, approaching sunset and becomes constant between sunset and midnight. The abalone remain within shaded refuges during the day, and only emerge from them at night. The present study evaluated some effects of varying the photoperiod on a group of these abalone to determine its potential effects on their feeding behavior. Three groups of juvenile abalone with an initial mean length near 14 mm were maintained in raceway cage culture systems with a continuous flow ...
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Article: Evaluation of growth and survival of juveniles of the Japanese ...
Journal of Shellfish Research;
September 1, 2007 ;
700+ words
... ... survival of the Japanese abalone Haliotis discus hannai were studied over a six-month period ... alternative for the culture of Haliotis discus hannai both in land-based cultures, and ... the baskets. KEY WORDS: Haliotis discus hannai, juveniles, growth and survival ...
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