Scholarlink

<p>Within the regime of tropical inland fisheries, floodplain wetlands are biologically rich and sensitive ecosystems that support unique ichthyofaunal diversity and provide substantial livelihood and nutritional security to poor small-scale fishers (SSFs) in a changing climate. To protect and enhance livelihood and nutritional security, as well as to boost the adaptive capacity of resource-poor SSFs, we attempted a novel approach to climate-smart fisheries. This approach incorporates a combination of nutritious, climate-resilient small indigenous fishes (SIFs), namely <i>Systomous sarana</i> and <i>Labeo bata</i>, along with pen aquaculture technology in tropical floodplain wetlands. This system serves as a low-cost food production system under changing climate scenarios. A total of 9 HDPE (High-Density Poly-Ethylene) pens (0.1&#xa0;ha each) were installed&#xa0;in each of the three selected tropical floodplain wetlands. Three alternative stocking densities (SD 10 no. fingerlings/m<sup>2</sup>, SD 20 no. fingerlings/m<sup>2</sup>, and SD 30 no. fingerlings/m<sup>2</sup>) in triplicate with <i>S. sarana</i> and <i>L. bata</i> in a 1:1 ratio were experimented with for fish growth, feed utilization and economic profitability. A 120-day culture period was performed during the transient period between pre-monsoon and monsoon seasons to test the resilience of this climate-smart approach. WG%, SGR, PER and the percentage of survival were lowest (<i>p</i> &lt; 0.05), with highest (<i>p</i> &lt; 0.05) FCR and net yield in SD30. R/C ratio analysis concerning the total revenue generated through pen culture i.e., the net return indicated that SD20 was significantly more profitable than other combinations. It was also observed that the pen structure is resilient enough during the extreme seasons (average monthly wind speed gusts 16.66 ± 1.19&#xa0;km/hr, maximum monthly surface water temperature 33.84 ± 3.03&#xa0;°C, monthly total rainfall 149 ± 79.78&#xa0;mm and average monthly water depth 1.62 ± 0.39&#xa0;m). The current study is also equally important from a regional as well as a global perspective concerning the sustainable mitigation of hidden hunger among SSFs in underdeveloped countries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Improving approaches towards climate-smart wetland fisheries with a focus on small indigenous fishes

  • 期刊论文

  • 发表日期：

    2025年2月4日

查看全文
  • Sanjeet Debnath,
  • Gunjan Karnatak,
  • Mishal Puthiyottil,
  • Lianthuamluaia Lianthuamluaia,
  • Suman Kumari,
  • Bandana Das Ghosh,
  • Snigdhodeb Dutta,
  • Simanku Borah,
  • Uttam Kumar Sarkar,
  • Basanta Kumar Das

摘要

Within the regime of tropical inland fisheries, floodplain wetlands are biologically rich and sensitive ecosystems that support unique ichthyofaunal diversity and provide substantial livelihood and nutritional security to poor small-scale fishers (SSFs) in a changing climate. To protect and enhance livelihood and nutritional security, as well as to boost the adaptive capacity of resource-poor SSFs, we attempted a novel approach to climate-smart fisheries. This approach incorporates a combination of nutritious, climate-resilient small indigenous fishes (SIFs), namely Systomous sarana and Labeo bata, along with pen aquaculture technology in tropical floodplain wetlands. This system serves as a low-cost food production system under changing climate scenarios. A total of 9 HDPE (High-Density Poly-Ethylene) pens (0.1 ha each) were installed in each of the three selected tropical floodplain wetlands. Three alternative stocking densities (SD 10 no. fingerlings/m2, SD 20 no. fingerlings/m2, and SD 30 no. fingerlings/m2) in triplicate with S. sarana and L. bata in a 1:1 ratio were experimented with for fish growth, feed utilization and economic profitability. A 120-day culture period was performed during the transient period between pre-monsoon and monsoon seasons to test the resilience of this climate-smart approach. WG%, SGR, PER and the percentage of survival were lowest (p < 0.05), with highest (p < 0.05) FCR and net yield in SD30. R/C ratio analysis concerning the total revenue generated through pen culture i.e., the net return indicated that SD20 was significantly more profitable than other combinations. It was also observed that the pen structure is resilient enough during the extreme seasons (average monthly wind speed gusts 16.66 ± 1.19 km/hr, maximum monthly surface water temperature 33.84 ± 3.03 °C, monthly total rainfall 149 ± 79.78 mm and average monthly water depth 1.62 ± 0.39 m). The current study is also equally important from a regional as well as a global perspective concerning the sustainable mitigation of hidden hunger among SSFs in underdeveloped countries.