Assessment gaps and biases in knowledge of conservation status of fishes

Miqueleiz, Imanol; Böhm, Monika; Ariño, Arturo H.; Miranda, Rafael

doi:10.1002/aqc.3282

Cited by 33 publications

(34 citation statements)

References 71 publications

(116 reference statements)

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“…Non-comprehensively assessed groups may primarily focus on species that are likely threatened or likely used by people, or may have a regional focus. Excluding these groups avoids introducing biases into our analysis, as for instance threat processes are usually not evenly distributed geographically (Miqueleiz et al 2020).…”

Section: Methodsmentioning

confidence: 99%

Prevalence of sustainable and unsustainable use of wild species inferred from the IUCN Red List

Marsh

Hoffmann

Burgess

et al. 2020

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Unsustainable exploitation of wild species represents a serious threat to biodiversity and to the livelihoods of local communities and indigenous peoples. However, managed, sustainable use has the potential to forestall extinctions, aid recovery, and meet human needs. Here, we infer current prevalence of unsustainable and sustainable biological resource use among species groups; research to date has focused on the former with little consideration of the latter. We analyzed species level data for 30,923 species from 13 taxonomic groups comprehensively assessed on the IUCN Red List. Our results demonstrate the broad taxonomic prevalence of use, with 40% of species (10,098 of 25,009 from 10 taxonomic groups with adequate data) documented as being used. The main purposes of use are pets, display animals and horticulture, and human consumption. Use is often biologically unsustainable: intentional use is currently considered to be contributing to elevated extinction risk for more than one quarter of all threatened or Near Threatened (NT) species (2,752 to 2,848 of 9,753 species). Of the species used and traded, intentional use threatens 16% (1,597 to 1,631 of 10,098 species). However, 36% of species that are used (3,651 of 10,098 species) have either stable or improving population trends and do not have biological use documented as a threat, including 172 threatened or NT species. It is not yet inferable whether use of the remaining 48% of species is sustainable; we make suggestions for improving use related Red List data to elucidate this. Around a third of species that have use documented as a threat are not currently receiving any species management actions that directly address this threat. Our findings on the prevalence of sustainable and unsustainable use, and variation across taxa, are important for informing international policy-making, including IPBES, the Convention on Biological Diversity, and the Convention on International Trade in Endangered Species.

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Section: Methodsmentioning

confidence: 99%

Prevalence of sustainable and unsustainable use of wild species inferred from the IUCN Red List

Marsh

Hoffmann

Burgess

et al. 2020

Preprint

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“…Nowadays, almost 10,000 freshwater fish species have been assessed, and approximately 23% are currently threatened with extinction (IUCN, 2020). However, their assessment rate remain below compared to any other vertebrate group (Tapley et al, 2018;Miqueleiz et al, 2020).…”

Section: Introductionmentioning

confidence: 92%

Effective reassessments of freshwater fish species: a case study in a Mediterranean peninsula

et al. 2021

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IUCN Red List assessments for fish species can quickly become out of date. In recent years molecular techniques have added new ways of obtaining information about species distribution or populations. In this work, we propose the Iberian Peninsula as an example of reassessment needs in its endangered freshwater fish fauna. We compiled the list of freshwater fish species occurring in continental Spain and Portugal and examined their conservation status in global and national Red Lists. We retrieved records for these species in the Iberian Peninsula and calculated several biological indexes (richness and vulnerability indexes). Our results showed a patchy data coverage of fish records in the Iberian Peninsula. Threat levels reported within national Red Lists are higher than their global counterparts, reinforcing the necessity of improving and maintaining up to date national Red Lists. Iberian watersheds have moderate levels of threat and high levels of out of date assessments. The nearly fully completed genetic databases for Iberian fish species, along with the limited distribution of many endangered species and the necessity of update their assessments constitute an excellent opportunity to use data obtained from eDNA to improve species monitoring practices and their conservation status.

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“…While the extinction risk of nearly all terrestrial vertebrates has been assessed 10,12 , there are still substantial data gaps in other species groups [13][14][15] . To address this situation, the sampled Red List Index (sRLI) was devised to expand taxonomic coverage of the IUCN Red List in a way that also allows aggregation of underrepresented species groups into global biodiversity indicators 11 .…”

Section: Introductionmentioning

confidence: 99%

Monitoring Extinction Risk and Threats of the World’s Fishes based on the Sampled Red List Index

Miranda¹,

Miqueleiz²,

Darwall³

et al. 2020

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Global biodiversity targets require us to identify species at risk of extinction and quantify status and trends of biodiversity. The Red List Index (RLI) tracks trends in the conservation status of entire species groups over time by monitoring changes in categories assigned to species. Here, we calculate this index for the world’s fishes in 2010, using a sampled approach to the RLI based on a randomly selected sample of 1,500 species, and also present RLI splits for freshwater and marine systems separately. We further compare specific traits of a worldwide fish list to our sample to assess its representativeness. Overall, 15.1% of species in the sample were estimated to be threatened with extinction, resulting in an sampled RLI of 0.914 for all species, 0.972 in marine and 0.860 in freshwater ecosystems. Our sample showed fishing as the principal threat for marine species, and pollution by agricultural and foresty effluents for freshwater fishes. The sampled list provides a robust representation for tracking trends in the conservation status of the world’s fishes, including disaggregated sampled indices for marine and freshwater fish. Reassessment and backcasting of this index is urgent to check the achievement of the commitments proposed in global biodiversity targets.

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Assessment gaps and biases in knowledge of conservation status of fishes

Cited by 33 publications

References 71 publications

Prevalence of sustainable and unsustainable use of wild species inferred from the IUCN Red List

Prevalence of sustainable and unsustainable use of wild species inferred from the IUCN Red List

Effective reassessments of freshwater fish species: a case study in a Mediterranean peninsula

Monitoring Extinction Risk and Threats of the World’s Fishes based on the Sampled Red List Index

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