We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Production and sinking rates for bio-deposits of abalone ( Haliotis discus hannai Ino).
- Authors
Zhang, Jihong; Ren, Lihua; Wu, Wenguang; Gao, Yaping; Du, Meirong; Fang, Jianguang
- Abstract
Particle size distribution, organic content and the sinking velocity of bio-deposits of abalone Haliotis discus hannai Ino were evaluated. The abalone was divided into three size classes according to shell length: Group B: 68.8 ± 2.8 mm, group M: 56.1 ± 2.3 mm and group S: 42.4 ± 2.8 mm. The faecal pellets had an amorphous shape, with a cross-sectional area ranging from 0.01 to 2.64 mm2. The mean cross-sectional area varied among the size classes: 0.59 (B), 0.21 (M) and 0.12 (S) mm2. The bio-deposit organic content was similar among the groups (B: 18.3 ± 1.1%; M: 19.9 ± 0.9%; S: 19.3 ± 1.0%). Sinking velocity ranged from 0.5 to 2.3 cm s−1. Larger abalone tended to have larger and thus faster-sinking faecal pellets. The median sinking velocity for groups B, M and S was 0.9, 0.5 and 0.7 cm s−1 respectively. The mean daily production rates for groups S, M and B were 2.8 ± 1.2 , 3.4 ± 1.3 and 4.3 ± 1.8 g ind.−1 respectively. Bio-deposit production rate estimated to be between 134.4 and 206.4 mg m−2 day−1 in the bay. Our results suggest that the pellet size was within the appropriate size range for filter-feeding bivalves.
- Subjects
ABALONE culture; PELLETED feed; FISH feeds; FILTER feeding; PARTICLE size distribution; FISHES
- Publication
Aquaculture Research, 2014, Vol 45, Issue 12, p2041
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.12151