Exploitation and Other Threats to Fish Conservation

Reynolds, John D.; Dulvy, Nicholas K.; Roberts, Callum M.

doi:10.1002/9780470693919.ch15

Cited by 31 publications

(25 citation statements)

References 90 publications

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“…Overexploitation is generally considered the primary threat facing coral reef fishes (Friedlander and DeMartini 2002;Reynolds et al 2002Reynolds et al , 2005Dulvy et al 2003;DeMartini et al 2008). Although there are no documented cases of global marine fish extinctions, marked declines have occurred in several species, some of which are considered to be extinct at local or regional scales (Dulvy et al 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Despite some speciesspecific differences, the life history characteristics common among a majority of the IUCN-listed species recorded during surveys make them particularly vulnerable to overexploitation. These characteristics include slow growth, long life span, late sexual maturation, group spawning, low replenishment rates, and low natural abundance (Reynolds et al 2002;Sadovy and Cheung 2003;Tupper 2007;Sadovy de Mitcheson et al 2008). These life history characteristics, combined with the Pacific-wide declines of many of these species, reinforce the importance of large-scale assessments and conservation efforts.…”

Section: Discussionmentioning

confidence: 99%

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The IUCN Red List of Threatened Species: an assessment of coral reef fishes in the US Pacific Islands

et al. 2013

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Widespread declines among many coral reef fisheries have led scientists and managers to become increasingly concerned over the extinction risk facing some species. To aid in assessing the extinction risks facing coral reef fishes, large-scale censuses of the abundance and distribution of individual species are critically important. We use fisheries-independent data collected as part of the NOAA Pacific Reef Assessment and Monitoring Program from 2000 to 2009 to describe the range and density across the US Pacific of coral reef fishes included on The International Union for the Conservation of Nature's (IUCN) 2011 Red List of Threatened Species. Forty-five species, including sharks, rays, groupers, humphead wrasse (Cheilinus undulatus), and bumphead parrotfish (Bolbometopon muricatum), included on the IUCN List, were recorded in the US Pacific Islands. Most species were generally rare in the US Pacific with the exception of a few species, principally small groupers and reef sharks. The greatest diversity and densities of IUCN-listed fishes were recorded at remote and uninhabited islands of the Pacific Remote Island Areas; in general, lower densities were observed at reefs of inhabited islands. Our findings complement IUCN assessment efforts, emphasize the efficacy of large-scale assessment and monitoring efforts in providing quantitative data on reef fish assemblages, and highlight the importance of protecting populations at remote and uninhabited islands where some species included on the IUCN Red List of Threatened Species can be observed in abundance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The IUCN Red List of Threatened Species: an assessment of coral reef fishes in the US Pacific Islands

et al. 2013

View full text Add to dashboard Cite

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“…A slow life history (e.g. late maturity, long reproductive span and large body size) is related to low maximum population growth rates and, consequently, such species are more vulnerable and have less capacity to recover from exploitation (Hutchings 2001;Reynolds et al 2001Reynolds et al , 2002. (2.3) Removal rate -speciesbased quotas established by IBAMA to ensure that harvests are maintained at a sustainable level.…”

Section: Analysis Of Catch Sustainability Of Ornamental Reef Fish By-mentioning

confidence: 99%

“…Large body size is often correlated with other vulnerability factors, such as late maturity, and substantially increases the possibility of being caught in traps Reynolds et al 2002;Cheung et al 2007). Body size is a useful measure in evaluating species resilience owing to its relationship with the intrinsic rate of increase of a population.…”

Section: Resiliencementioning

confidence: 99%

A rapid new method for assessing sustainability of ornamental fish by-catch from coral reefs

Feitosa

Ferreira

Araújo

2008

Mar. Freshwater Res.

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The ornamental fish trade has considerable potential for damaging reef environments. Nearly 120 species are currently harvested in the Brazilian trade and little attention has been paid to the effects of the accidental catch of these species. Records of ornamental fish by-catch and the susceptibility and resilience of species from the major Brazilian families in the aquarium trade were examined to test a method and determine the sustainability of these catches. Each species was assessed based on two groups of criteria: (1) relative vulnerability to capture; and (2) population resilience to mortality due to fishing efforts. Each species was also ranked (1-3) for criteria regarding ecology, biology, catchability, numbers of individuals exported by aquarium companies and mortality index. These criteria were then weighted and each species rank in the two groups of criteria was plotted. Nineteen species from 10 families were recorded. The species least likely to have sustainable catch rates included Holacanthus tricolor, H. ciliaris, Chaetodon striatus and Pomacanthus paru. This approach is a useful alternative for management efforts and the assessment of catch sustainability in newly developed multi-species fisheries with limited available data, which occur in areas of high species richness such as reefs.

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“…They are among the most heavily altered ecosystems with disproportionately high biodiversity loss worldwide [1,2]. Major systematic drivers of aquatic species loss include land cover and land use change (LUCC), overexploitation, invasive species, and climate change [3][4][5][6][7][8]. Direct and indirect competition for water resources with humans (e.g., water abstraction for irrigation) impose stress upon aquatic ecosystems and imperil fauna [9].…”

Section: Introductionmentioning

confidence: 99%

Land Cover, Land Use, and Climate Change Impacts on Endemic Cichlid Habitats in Northern Tanzania

Kalácska

Arroyo‐Mora

Lucanus³

et al. 2017

Remote Sensing

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Abstract:Freshwater ecosystems are among the most threatened on Earth, facing environmental and anthropogenic pressures often surpassing their terrestrial counterparts. Land use and land cover change (LUCC) such as degradation and fragmentation of the terrestrial landscape negatively impacts aquatic ecosystems. Satellite imagery allows for an impartial assessment of the past to determine habitat alterations. It can also be used as a forecasting tool in the development of species conservation strategies through models based on ecological factors extracted from imagery.In this study, we analyze Landsat time sequences to quantify LUCC around three freshwater ecosystems with endemic cichlids in Tanzania. In addition, we examine population growth, agricultural expansion, and climate change as stressors that impact the habitats. We found that the natural vegetation cover surrounding Lake Chala decreased from 15.5% (1984) to 3.5% (2015). At Chemka Springs, we observed a decrease from 7.4% to 3.5% over the same period. While Lake Natron had minimal LUCC, severe climate change impacts have been forecasted for the region. Subsurface water data from the Gravity Recovery and Climate Experiment (GRACE) satellite observations further show a decrease in water resources for the study areas, which could be exacerbated by increased need from a growing population and an increase in agricultural land use.

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Exploitation and Other Threats to Fish Conservation

Cited by 31 publications

References 90 publications

The IUCN Red List of Threatened Species: an assessment of coral reef fishes in the US Pacific Islands

The IUCN Red List of Threatened Species: an assessment of coral reef fishes in the US Pacific Islands

A rapid new method for assessing sustainability of ornamental fish by-catch from coral reefs

Land Cover, Land Use, and Climate Change Impacts on Endemic Cichlid Habitats in Northern Tanzania

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