Harvest‐induced phenotypic change in inland fisheries

Chapman, Lauren J.; Sharpe, Diana M. T.

doi:10.1002/9781118394380.ch49

Cited by 3 publications

(2 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Differences in maturity size between habitats could be linked to the availability and quality of food and to fishing pressure (Pauly 1976;Panfili et al 2004). Size at maturity may decrease, for example, in response to heavy fishing pressure (Chapman and Sharpe 2015).…”

Section: Discussionmentioning

confidence: 99%

Population parameters and exploitation rate ofSarotherodon galilaeus galilaeus(Cichlidae) in Lakes Doukon and Togbadji, Benin

Lederoun

Vandewalle

Brahim

et al. 2016

African Journal of Aquatic Science

View full text Add to dashboard Cite

Growth, mortality, recruitment and relative yield per recruit of Sarotherodon galilaeus galilaeus from Lakes Doukon and Togbadji were studied. Data on total length, total weight and sex were recorded on a monthly basis between January and December 2013 for S. g. galilaeus captured by local fishers. The estimated asymptotic lengths L" were 26.2 and 23.6 cm for Lakes Doukon and Togbadji, respectively, while the growth rate K was 0.73 in Lake Doukon and 0.87 in Lake Togbadji. Estimates of fishing mortality, 0.27 and 0.47 y -1 for Doukon and Togbadji, respectively, were low relative to natural mortality, 1.51 and 1.74 y -1 , respectively. Sizes at first sexual maturity were 12.8 and 13.2 cm for females and males, respectively, in Lake Doukon, and 11.5 and 12.4 cm for females and males, respectively, in Lake Togbadji. The size at first capture was estimated at 13.3 and 12.7 cm for Lakes Doukon and Togbadji, respectively, which, in the light of the size at maturity estimates, indicates that fish spawn at least once before capture. The current exploitation rates of 0.15 for Lake Doukon and 0.21 for Lake Togbadji suggest that their stocks of S. g. galilaeus are not overexploited in either lake.

show abstract

Section: Discussionmentioning

confidence: 99%

Population parameters and exploitation rate ofSarotherodon galilaeus galilaeus(Cichlidae) in Lakes Doukon and Togbadji, Benin

Lederoun

Vandewalle

Brahim

et al. 2016

African Journal of Aquatic Science

View full text Add to dashboard Cite

show abstract

“…To date, the majority of studies of fisheries-induced change have focused on temperate marine species (Sharpe & Hendry, 2009). Data from inland freshwater systems, and in particular, those in the tropics remain limited (Chapman & Sharpe, 2016). Second, many studies exploring harvest-induced change have focused on stocks that have already been fished for decades, such as the Nile perch, Lates niloticus (L.) (Allan et al, 2005;Goudswaard et al, 2008;Paterson & Chapman, 2009), or even centuries, as in the case of the Atlantic cod (Hutchings, 2005;Kuparinen & Merila, 2007;Palkovacs, 2011).…”

Section: Introductionmentioning

confidence: 99%

Trends in an emerging artisanal fishery of the African cyprinid Rastrineobola argentea in Lake Nabugabo, Uganda

Groves

Sharpe

Nkalubo

et al. 2021

Fisheries Management Eco

Self Cite

View full text Add to dashboard Cite

Fishing pressure can have strong impacts on fish populations, driving declines in abundance and, occasionally, changing life history traits. However, much of our current understanding of these phenomena derives from studies conducted decades or even centuries after the onset of fishing. Newly established fisheries provide an excellent opportunity to understand this critical early phase. Temporal trends in catch data and life history traits of the cyprinid fish Rastrineobola argentea (Pellegrin), now the target of a burgeoning artisanal fishery in Lake Nabugabo, Uganda, were analysed. Results showed that the R. argentea fishery intensified and became more selective during the first decade since its establishment (2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018)(2019), while catch-per-unit-effort of R. argentea (fisheries-independent abundance) at repeatedly sampled sites in the lake decreased over this same time period. Size-adjusted egg volume and ovary mass increased significantly over the time period, which may reflect a density-dependent response to a fisheries-induced population decline.

show abstract

Fisheries governance and management

Welcomme

2015

Freshwater Fisheries Ecology

View full text Add to dashboard Cite

Harvest‐induced phenotypic change in inland fisheries

Cited by 3 publications

References 68 publications

Population parameters and exploitation rate ofSarotherodon galilaeus galilaeus(Cichlidae) in Lakes Doukon and Togbadji, Benin

Population parameters and exploitation rate ofSarotherodon galilaeus galilaeus(Cichlidae) in Lakes Doukon and Togbadji, Benin

Trends in an emerging artisanal fishery of the African cyprinid Rastrineobola argentea in Lake Nabugabo, Uganda

Fisheries governance and management

Contact Info

Product

Resources

About