GROWTH, REPRODUCTIVE CONDITION, AND DIGESTIVE TUBULE ATROPHY OF PACIFIC OYSTER CRASSOSTREA GIGAS IN GAMAKMAN BAY OFF THE SOUTHERN COAST OF KOREA
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Title
- GROWTH, REPRODUCTIVE CONDITION, AND DIGESTIVE TUBULE ATROPHY OF PACIFIC OYSTER CRASSOSTREA GIGAS IN GAMAKMAN BAY OFF THE SOUTHERN COAST OF KOREA
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Author(s)
- Kang, Do-Hyung; Chu, Fu-Lin E.; Yang, Hyun-Sung; Lee, Chang-Ho; Koh, Hyeong-Beom; Choi, Kwang-Sik
- KIOST Author(s)
- Kang, Do Hyung(강도형)
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Alternative Author(s)
- 강도형
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Publication Year
- 2010-12
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Abstract
- Spat of Pacific oysters (Crassostrea gigas) were collected from Gamakman Bay, Korea, and raised in a spat hardening facility located in the low intertidal zone of the bay for a "hardening/stunting" period of 10 mo. Seasonal changes in growth, reproductive condition, and digestive tubule atrophy (DTA) of these "hardened/stunted" oysters were monitored for more than a year after transplanting to a suspended longline system in a grow-out area in the bay. After transplantation, the hardened/stunted oysters showed a logarithmic increase in shell size for the first 4 mo, from June to October, and growth remained stable from late fall to early spring. During the 12 mo of the grow-out, the shell size of the hardened/stunted oysters increased from 15.4-74.2 mm, and tissue weight increased from 0.49-12.85 g. Histological analysis revealed that gametogenesis of hardened/stunted oysters commenced as early as February when water temperature remained at 10 degrees C, and spawning occurred from July to September when water temperature reached 25-27 degrees C. DTA assessed from histological analysis was higher from September to February, when the chlorophyll a level in the bay was lower. These data suggest that seasonal fluctuations in water temperature and food availability in the water column are the 2 main environmental parameters governing reproduction and growth of oyster in Gamakman Bay, and DTA could be a useful biomarker for monitoring the nutritional condition of oysters.
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ISSN
- 0730-8000
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/4000
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DOI
- 10.2983/035.029.0418
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Bibliographic Citation
- JOURNAL OF SHELLFISH RESEARCH, v.29, no.4, pp.839 - 845, 2010
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Publisher
- NATL SHELLFISHERIES ASSOC
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Subject
- MYTILUS-EDULIS; BIOCHEMICAL-COMPOSITION; POPULATION-DYNAMICS; SUSPENDED CULTURE; JAPANESE OYSTER; VIRGINICA; THUNBERG; HISTOPATHOLOGY; BIVALVIA; MODEL
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Keywords
- oyster; Crassostrea gigas; hardening; reproduction; digestive tubule atrophy; Gamakman Bay; Korea
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Type
- Article
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Language
- English
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Document Type
- Article
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