气候变化领域集成服务门户(CCPortal): Population parameters and conservation implications for one of the world's rarest marine fishes, the red handfish (Thymichthys politus)

CCPortal

DOI	10.1111/jfb.15651
	Population parameters and conservation implications for one of the world's rarest marine fishes, the red handfish (Thymichthys politus)
	Bessell, Tyson J.; Stuart-Smith, Rick D.; Johnson, Olivia J.; Barrett, Neville S.; Lynch, Tim P.; Trotter, Andrew J.; Stuart-Smith, Jemina
发表日期	2024
ISSN	0022-1112
EISSN	1095-8649
起始页码	104
结束页码	4
卷号	104 期号:4
英文摘要	Population estimates are required for effective conservation of many rare marine species, but can be difficult to obtain. The critically endangered red handfish (Thymichthys politus) is a coastal anglerfish known only from two fragmented populations in southeast Tasmania, Australia. It is at a high risk of extinction due to low numbers, loss of habitat, and the impacts of climate change. To aid conservation efforts, we provide the first empirical population size estimates of red handfish and investigate other important aspects of the species' life history, such as growth, habitat association, and movement. We surveyed both red handfish local populations via underwater visual census on scuba over 3 years and used photographic mark-recapture techniques to estimate biological parameters. In 2020, the local adult population size was estimated to be 94 (95% confidence interval [CI] 40-231) adults at one site, and 7 (95% CI 5-10) at the other site, suggesting an estimated global population of 101 adults. Movement of individuals was extremely limited at 48.5 m (+/- 77.7 S.D.) per year. We also found evidence of declining fish density, a declining proportion of juveniles, and increasing average fish size during the study. These results provide a serious warning that red handfish are likely sliding toward extinction, and highlight the urgent need to expand efforts for ex situ captive breeding to bolster numbers in the wild and maintain captive insurance populations, and to protect vital habitat to safeguard the species' ongoing survival in the wild.
英文关键词	IUCN red list; mark-recapture; nursery habitat; reef; seagrass; threatened species
语种	英语
WOS研究方向	Fisheries ; Marine & Freshwater Biology
WOS类目	Fisheries ; Marine & Freshwater Biology
WOS记录号	WOS:001138119500001
来源期刊	JOURNAL OF FISH BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300617
作者单位	University of Tasmania; Commonwealth Scientific & Industrial Research Organisation (CSIRO)
推荐引用方式 GB/T 7714	Bessell, Tyson J.,Stuart-Smith, Rick D.,Johnson, Olivia J.,et al. Population parameters and conservation implications for one of the world's rarest marine fishes, the red handfish (Thymichthys politus)[J],2024,104(4).
APA	Bessell, Tyson J..,Stuart-Smith, Rick D..,Johnson, Olivia J..,Barrett, Neville S..,Lynch, Tim P..,...&Stuart-Smith, Jemina.(2024).Population parameters and conservation implications for one of the world's rarest marine fishes, the red handfish (Thymichthys politus).JOURNAL OF FISH BIOLOGY,104(4).
MLA	Bessell, Tyson J.,et al."Population parameters and conservation implications for one of the world's rarest marine fishes, the red handfish (Thymichthys politus)".JOURNAL OF FISH BIOLOGY 104.4(2024).