气候变化领域集成服务门户(CCPortal): Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?

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DOI	10.1016/j.crm.2021.100325
	Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?
	Kumar Sarkar U.; Roy K.; Naskar M.; Karnatak G.; Puthiyottil M.; Baksi S.; Kumari S.; Lianthuamluia L.; Kumar Das B.
发表日期	2021
ISSN	2212-0963
起始页码	1
结束页码	6
卷号	33
英文摘要	Minnows are the most ignored yet indispensable group of freshwater fishes in Asian inland waters. The reproductive resilience of minnows facing climatic variability, using a wetland inhabiting species Amblypharyngodon mola (Mola carplets) in lower Indo-Gangetic floodplains, was validated. Results revealed that spawning decision in females (threshold gonadosomatic index ≥ 5 units) is neither cued by water temperature nor rainfall. They can maintain pre-spawning fitness (condition factor 1.12–1.25 units) within a broad temperature (22–33 °C) and rainfall (0–800 mm) window by active feeding, thus no risk of skipped spawning decisions while facing future climatic variabilities. Present breeding phenology (May-December) might have prolonged in the recent decade, especially the tail-end, concomitant with increasingly hot and rainy monsoon (May-August) and warmer post-monsoon months (September-December). Minnows are expected to prosper in a future climatic scenario, contributing to ecosystem balance (algal grazers) and regional food security. Female first maturity (♀ puberty) was encountered at 4.7–5.1 cm total length, hinting at a probable increase in the recent decade. Climate-favored prolonged recruitment window, in absence of extreme fishing pressure (currently), might have led to such pattern. However, this state might be temporary and labile. Minnows may soon get altered to earlier puberty (=warning sign of stock collapse) if fishing pressure intensifies under a reproductively favoring climate progression. Threshold body girth for spawning females was estimated at 3.2–3.4 cm (+17% than non-breeding ones). Fishing nets having mesh sizes (=total circumference) at least > 32–34 mm will most likely be the key to minnows’ endurance or survival in the coming decades. © 2021
英文关键词	Climate change; Mesh size; Overfishing threat; Small indigenous fishes; Vulnerability assessment
来源期刊	Climate Risk Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183093
作者单位	ICAR-Central Inland Fisheries Research Institute, Barrackpore, West Bengal 700120, India; University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, České Budějovice, 370 05, Czech Republic
推荐引用方式 GB/T 7714	Kumar Sarkar U.,Roy K.,Naskar M.,et al. Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?[J],2021,33.
APA	Kumar Sarkar U..,Roy K..,Naskar M..,Karnatak G..,Puthiyottil M..,...&Kumar Das B..(2021).Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?.Climate Risk Management,33.
MLA	Kumar Sarkar U.,et al."Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?".Climate Risk Management 33(2021).