National Taiwan Ocean University Institutional Repository:Item 987654321/33131
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28588/40619
Visitors : 4194881      Online Users : 43
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item:

Title: A pilot study of producing organic shrimp in subtropical regions:A case study in Taiwan
Authors: Chen Y.S.;Liao I.C.
Contributors: 國立臺灣海洋大學:海洋生物科技及環境生態中心
Keywords: Organic aquaculture;organic shrimp;tropical aquaculture;Litopenaeus vannamei;Marsupenaeus japonicus;integrated aquaculture
Date: 2005
Issue Date: 2012-10-19T07:24:41Z
Publisher: Researching Sustainable Systems. International Society of Organic Agriculture Research (ISOFAR)
Abstract: abstract:The study was conducted to evaluate the applicability of producing organic shrimp without using any chemicals in Ilan, Taiwan. The trials respectively employed intensive monoculture of two penaeoid species, white shrimp (Litopenaeus vannamei) and kuruma prawn (Marsupenaeus japonicus) and extensive polyculture of kuruma prawn (0.56 m-2 stocking density) and grey mullets (500 pcs). Experimental units consisted of three earthen ponds, 900 m2, 1100 m2 and 4600 m2, respectively with a minimal water exchange. No significant effects in shrimp growth were found with the probiotics used in the trials. Although the survival rates for both species in the first two trials were low and obviously affected by the disease outbreaks, the third trial on extensive polyculture with grey mullet achieved a high survival and growth rate (3.8 g to 37.3 g) during the 12 weeks culture period. Dissolved oxygen concentration in three ponds fluctuates on a 24-hour basis, increases during daylight hours and decreases at nighttime even dropping to a critical level of 2.03 mg/L. The results obtained from those trials indicate that the culture conditions must be carefully maintained. Although our trials did not achieve good results, they can provide some implications for future research. Also, maintaining an organic ecosystem may simply be too difficult for some aquaculture systems. Thus, it would be unrealistic to say that all aquaculture systems, at least for those we currently know, would be suitable for organic certification. However, seeking a balance between aquaculture production and environmental protection will be our ultimate goal.
Relation: pp.452-455
Appears in Collections:[Center of Excellence for the Oceans] Lecture & Seminar

Files in This Item:

There are no files associated with this item.

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback