Studies on mass summer mortality of cultured zhikong scallops (Chlamys farreri Jones et Preston) in China
文献类型：期刊论文
| 作者 | Xiao, H; Ford, SE; Yang, HS ; Zhang, GF; Zhang, FS; Guo, XM
|
| 刊名 | AQUACULTURE
 |
| 出版日期 | 2005-12-30 |
| 卷号 | 250期号:3-4页码:602-615 |
| 关键词 | Summer Mortality Parasite Inbreeding Stress Reproduction Chlamys Farreri Scallops |
| ISSN号 | 0044-8486 |
| DOI | 10.1016/j.aquaculture.2005.05.002 |
| 文献子类 | Article |
| 英文摘要 | Mass mortalities of cultured zhikong scallops (Chlamys farreri) have occurred each summer in most culture areas of northern China since 1996. Among the hypothesized causes are high culture density, infectious disease and genetic inbreeding. To investigate these potential agents, C. farreri were deployed at three densities (low, medium and high) at three sites (Jiaonan, Penglai and Yantai) in the summer of 2000. Scallops were sampled for survival, growth and histopathology before, during and after a mortality episode. Most of the mortality occurred in July and August, during and toward the later part of the spawning season, when water temperature reached 23-26 degrees C. Final cumulative mortalities reached 85% to 90% at all three sites. Scallops in the medium and high densities had higher initial death rates than did those at the low density. High densities also inhibited growth. Ciliates from the genus Trichodina, larvae of various organisms and anomalous secretions were observed in sections of the gill cavity, with highest prevalence during and at the end of the mortality period. Prokaryotic inclusion bodies were found in the soft tissues, but their prevalence was low and apparently without correlation with mortalities. Genetic analysis with random amplified polymorphic DNA markers showed slightly lower heterozygosity in the cultured stocks (0.301) than in the wild stocks (0.331). It is possible that the mortalities are caused by a combination of several factors such as stress associated with reproduction, high temperature, overcrowding and poor circulation in the growout cages, opportunistic invaders or pathogens, and possibly inbreeding. (c) 2005 Elsevier B.V. All rights reserved.; Mass mortalities of cultured zhikong scallops (Chlamys farreri) have occurred each summer in most culture areas of northern China since 1996. Among the hypothesized causes are high culture density, infectious disease and genetic inbreeding. To investigate these potential agents, C. farreri were deployed at three densities (low, medium and high) at three sites (Jiaonan, Penglai and Yantai) in the summer of 2000. Scallops were sampled for survival, growth and histopathology before, during and after a mortality episode. Most of the mortality occurred in July and August, during and toward the later part of the spawning season, when water temperature reached 23-26 degrees C. Final cumulative mortalities reached 85% to 90% at all three sites. Scallops in the medium and high densities had higher initial death rates than did those at the low density. High densities also inhibited growth. Ciliates from the genus Trichodina, larvae of various organisms and anomalous secretions were observed in sections of the gill cavity, with highest prevalence during and at the end of the mortality period. Prokaryotic inclusion bodies were found in the soft tissues, but their prevalence was low and apparently without correlation with mortalities. Genetic analysis with random amplified polymorphic DNA markers showed slightly lower heterozygosity in the cultured stocks (0.301) than in the wild stocks (0.331). It is possible that the mortalities are caused by a combination of several factors such as stress associated with reproduction, high temperature, overcrowding and poor circulation in the growout cages, opportunistic invaders or pathogens, and possibly inbreeding. (c) 2005 Elsevier B.V. All rights reserved. |
| 学科主题 | Fisheries ; Marine & Freshwater Biology |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000234168500009 |
| 公开日期 | 2010-12-22 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/2701]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 作者单位 | Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, H,Ford, SE,Yang, HS,et al. Studies on mass summer mortality of cultured zhikong scallops (Chlamys farreri Jones et Preston) in China[J]. AQUACULTURE,2005,250(3-4):602-615. |
| APA | Xiao, H,Ford, SE,Yang, HS,Zhang, GF,Zhang, FS,&Guo, XM.(2005).Studies on mass summer mortality of cultured zhikong scallops (Chlamys farreri Jones et Preston) in China.AQUACULTURE,250(3-4),602-615. |
| MLA | Xiao, H,et al."Studies on mass summer mortality of cultured zhikong scallops (Chlamys farreri Jones et Preston) in China".AQUACULTURE 250.3-4(2005):602-615. |
入库方式： OAI收割
来源：海洋研究所
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