4.7 Article

Shrimp farmers perceptions on factors affecting shrimp productivity in integrated mangrove-shrimp systems in Ca Mau, Vietnam

期刊

OCEAN & COASTAL MANAGEMENT
卷 219, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ocecoaman.2022.106048

关键词

Integrated mangrove-shrimp system; Multivariate analysis; Mangrove ages; Shrimp productivity; Pond management; Pond water level

资金

  1. World-Wide Fund for Nature Vietnam [40001702/51 0001]

向作者/读者索取更多资源

The mangroves in the Mekong Delta in Vietnam have been degraded and lost due to various factors. To support local livelihoods and promote replanting, a 20-year mangrove lease program was initiated. However, the age of mangrove stands does not significantly affect shrimp productivity in integrated mangrove-shrimp systems. Water level management is identified as a key factor.
Vietnamese mangroves in the Mekong Delta have been degraded and lost by war, coastal development and aquaculture since the 1950s. However, to promote replanting and support local livelihoods Ca Mau province issued 20-year mangrove leases to local farmers in 1991 for 70:30 forest:exploitation, which was later changed to 60:40 in 2010. Extensive integrated mangrove-shrimp systems were particularly attractive to poor farmers and understanding their perceptions on factors affecting productivity as well as socio-economic, technical and financial characteristics can aid solutions to better management. Shrimp productivity is variable and concern from the local producers that this could be because of age of mangrove stands in the systems led to this study. Forty-six households were selected at random based on different mangrove ages (2-4, 5-7, 9-12 and > 12 years old) in Lam Hai commune, Ca Mau province. The structured questionnaires with both quantitative and qualitative methods, a participatory approach, principal component analysis (PCA), and analytic hierarchy process (AHP) were employed to evaluate the effects of mangrove ages on pond environment and shrimp productivity. The average farm area was 4.9 +/- 1.9 ha, with forest:exploitation ratio of 60:40. Mean shrimp productivity was 188.1 +/- 94.7 kg ha(-1) yr(-1) and this was not significantly different between the four ages of mangrove systems. High variable costs of pond dredging meant the lowest profit margin was recorded in >12 years old mangrove stands but the highest profit margin was found in 9-12 years. Water level management was identified as a key factor in stepwise regression analysis. The farmers' responses to the criteria for integrated mangrove-shrimp pond management under different mangrove age systems differ and are discussed.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据