globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0128579
论文题名:
Using Pooled Local Expert Opinions (PLEO) to Discern Patterns in Sightings of Live and Dead Manatees (Trichechus senegalensis, Link 1785) in Lower Sanaga Basin, Cameroon
作者: Theodore B. Mayaka; Aristide Takoukam Kamla; Caryn Self-Sullivan
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2015
发表日期: 2015-7-21
卷: 10, 期:7
语种: 英语
英文关键词: Lakes ; Rivers ; Estuaries ; Freshwater fish ; Ecosystems ; Fresh water ; Habitats ; Conservation science
英文摘要: We aimed at unveiling patterns in live and dead manatee sightings in the Lower Sanaga Basin, Cameroon. For this purpose, the expert opinions of 133 local fishers were collected during in-person interviews, distilled using categorical data analysis, and checked against scientific literature. The five main results are as follows: manatees were sighted averagely once a week in lakes, rivers, and the coast & estuaries, mostly in group sizes of 2-3; the odds of sighting live manatees (respectively dead manatees) decreased (respectively increased) from inland lakes to estuaries and the coast, via rivers; manatee carcasses were reported in all habitats, albeit more frequently in rivers; a distribution map based on fishers’ reports show two manatee concentration areas: Lake Ossa and the Malimba-Mbiako section of River Sanaga; the number of manatees was perceived as increasing despite incidental and directed catches. Thus, our findings corroborate earlier assessments of the Lower Sanaga Basin as being a major manatee conservation area. Additionally, from these results and the literature, we identified three hypotheses about local manatee persistence: deep pools such as lakes offer year round sanctuaries, not just dry-season refugia; seasonality of specific habitat variables determine manatee occurrence patterns; and local variability in habitat encroachment mediate the meta-population dynamics of manatee in the Lower Sanaga Basin. Finally, we examine the implications for data requirements in light of the small ecological scale at which the surveyed fishers ply their trade. Thus, consonant with the Malawi principles for the ecosystem approach to management (www.cbd.int/ecosystem), we recommend collecting data preferably at landscape scale, through a participatory monitoring program that fully integrates scientific and traditional knowledge systems. This program should include, amongst others, a standardised necropsy protocol for collecting mortality and biological data together with sonar and radio-telemetry technology to discern manatee use and movements between critical habitat components.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0128579&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/20286
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Department of Animal Biology, University of Dschang, Dschang, West Region, Cameroon;Department of Animal Biology, University of Dschang, Dschang, West Region, Cameroon;Oceanographic Center, Nova Southeastern University, 8000 North Ocean Drive, Dania Beach, Florida, 33004, United States of America

Recommended Citation:
Theodore B. Mayaka,Aristide Takoukam Kamla,Caryn Self-Sullivan. Using Pooled Local Expert Opinions (PLEO) to Discern Patterns in Sightings of Live and Dead Manatees (Trichechus senegalensis, Link 1785) in Lower Sanaga Basin, Cameroon[J]. PLOS ONE,2015-01-01,10(7)
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