Monitoring of tropical freshwater fish resources for sustainable use

Elliott, Vittoria; Phen, Chheng; Uy, Sophorn; Holtgrieve, Gordon W.

doi:10.1111/jfb.13974

Cited by 15 publications

(14 citation statements)

References 41 publications

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“…Key fishery types can be categorized according to these criteria, with the appropriate assessment tool expected to differ among systems (Table 3). Elliott et al (2019) used the Mekong system to develop and implement an integrated monitoring strategy to address the need for improved fisheries data. They proposed that a participatory approach could combine different data sources to reliably characterize the fishery.…”

Section: Discussionmentioning

confidence: 99%

From Amazon Catfish to Mekong Money Fish: Size‐based Assessment of Data‐Limited Commercial Inland Fisheries

et al. 2021

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Inland fisheries are often complex, spatially dispersed, and seasonal. A lack of monitoring can result in unreliable or incomplete catch data, suggesting a role for assessment methods based on population size structure. This paper evaluates and compares empirical size-based indicators and the length-based spawning potential ratio model as candidate tools for assessing data-limited commercial fisheries in inland systems. Case study applications are presented for a contrasting set of important fisheries in the Amazon Basin (Brazil, Bolivia, Colombia, and Peru), the Tonlé Sap River (Cambodia), Paraná River (Argentina), and Bayano Reservoir (Panama). These case studies were selected to explore the effects on assessment of factors including lack of life history information, spatial separation of life history stages, modality in population size structure of floodplain river fish, and fishing gear selectivity. An international workshop was organized to bring together experts from the study systems and elsewhere to discuss the results, and to highlight potential issues and caveats. It was concluded that length-based models may work well in cases where size-selective gears are used to target a few larger species with reliable life history parameter estimates. Empirical surveillance indicators are more flexible for integrating quantitative data with local expert knowledge in common data-poor situations. In general, size-based assessment can provide guidance for the sustainable management of target species in diverse inland fisheries.

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Section: Discussionmentioning

confidence: 99%

From Amazon Catfish to Mekong Money Fish: Size‐based Assessment of Data‐Limited Commercial Inland Fisheries

et al. 2021

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“…Key fi shery types can be categorized according to these criteria, with the appropriate assessment tool expected to differ among systems (Table 3 ). Elliott et al ( 2019 ) used the Mekong system to develop and implement an integrated monitoring strategy to address the need for improved fi sheries data. They proposed that a participatory approach could combine different data sources to reliably characterize the fi shery.…”

Section: Discussionmentioning

confidence: 99%

Fisheries Volume 46 Number 4 April 2021

2021

Fisheries

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“…The mainstem Mekong and the 3S rivers in Cambodia (Figure 1) are thought to be important spawning areas for migratory fishes based on available substrates and flow regime (Baird & Flaherty, 2005; Baran, 2006; Halls, Paxton, Hall, Hortle, et al, 2013a; Poulsen et al, 2002). Movement patterns (Poulsen et al, 2002), larval drift (Cowx et al, 2015) and female gravidity (Elliott, Chheng, Uy, & Holtgrieve, 2019) have been used to infer the general location of spawning sites, and deep pools on the Mekong mainstream are thought to serve as dry‐season refugia (Chan et al, 2005; Halls, Paxton, Hall, Hortle, et al, 2013a). However, precise spawning locations of most species remain poorly understood, and more direct observations are needed to understand species‐specific habitat requirements, site fidelity and seasonality.…”

Section: Overview Of Migratory Fish Knowledge Needs and Relevant Toolsmentioning

confidence: 99%

Priority knowledge needs for management of migratory fish species in Cambodia

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Elliott

Ainsley

et al. 2021

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Despite their economic and ecological importance, migratory fishes of the Lower Mekong Basin (LMB) remain understudied, which hampers effective management to sustain valuable fisheries and address serious threats such as habitat degradation, development and overharvest. From a list of potential knowledge needs, a group of fisheries professionals most frequently identified six top priorities for managing migratory fishes in Cambodia: (1) population abundances and trends, (2) life cycles and life history, (3) migration timing and triggers, (4) migration routes and distances, (5) locations of key habitats and spawning areas, and (6) environmental and habitat requirements. These needs are discussed along with nine relevant methodologies for addressing them, including fisheries‐dependent and fisheries‐independent sampling, reproductive techniques and captive studies, otolith and genetic analysis tools, and tagging and imaging techniques. A suggested research framework is also presented to inform adaptive management of migratory fishes. While emphasis is given to Cambodia, the analysis is also applicable to other LMB countries, given that migratory fishes occur throughout the basin and migrate across borders. It is suggested that a robust research and monitoring agenda is required to prioritise knowledge needs and select appropriate methodologies to answer questions vital to inform sustainable migratory fish management in Cambodia.

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Monitoring of tropical freshwater fish resources for sustainable use

Cited by 15 publications

References 41 publications

From Amazon Catfish to Mekong Money Fish: Size‐based Assessment of Data‐Limited Commercial Inland Fisheries

From Amazon Catfish to Mekong Money Fish: Size‐based Assessment of Data‐Limited Commercial Inland Fisheries

Fisheries Volume 46 Number 4 April 2021

Priority knowledge needs for management of migratory fish species in Cambodia

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