Water chemistry and endangered white-clawed Crayfish: a literature review and field study of water chemistry association in<i>Austropotamobius pallipes</i>

Haddaway, Neal R.; Mortimer, Robert J.G.; Christmas, Martin; Dunn, Alison M.

doi:10.1051/kmae/2014037

Cited by 9 publications

(8 citation statements)

References 57 publications

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“…Trouilhe et al, 2007;Favaro et al, 2010). Crayfish have a strong dependence on calcium for maintenance of the exoskeleton (Greenaway, 1985) and generally do not persist in locations where calcium concentration is below 5 mg L À1 (Jay and Holdich, 1981;Haddaway et al, 2015). Although 6 of the studies did not identify a relationship with water chemistry parameters, this likely reflects the lack of variation in such parameters over the scales studied, i.e., within catchment, rather than importance more generally.…”

Section: Water Chemistrymentioning

confidence: 90%

“…The selection criteria were designed to retain only those articles that were relevant to the aims of this review, i.e., that quantitatively assessed the relationship between crayfish occurrence/density and habitat variables. Studies that focussed solely on water chemistry parameters were excluded because these have been reviewed quantitatively elsewhere (Trouilhe et al, 2007;Haddaway et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

“…The analysis included only those studies which measured the importance of physical habitat, and excluded studies whose sole focus was water chemistry which is reviewed elsewhere (Trouilhe et al, 2007;Haddaway et al, 2015). However, 8 of the catchment-scale studies analysed included chemistry as well as physical habitat.…”

Section: Water Chemistrymentioning

confidence: 99%

“…Conversely, it is often absent from watercourses where conditions appear optimal, with no previous pollution or invasive crayfish, and no apparent dispersal limitations (Nardi et al, 2005). Recent quantitative reviews have focussed solely on water quality, identifying tolerance thresholds of A. pallipes for the main water chemistry parameters (Trouilhe et al, 2007;Haddaway et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Habitat use by the endangered white-clawed crayfishAustropotamobiusspecies complex: a systematic review

Rosewarne

Mortimer

Dunn

2017

Knowl. Manag. Aquat. Ecosyst.

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-Understanding habitat requirements is a key part of conserving declining species, particularly when reintroductions are planned as part of the recovery strategy. The white-clawed crayfish (Austropotamobius pallipes) has undergone severe declines across its range and is now classified by the International Union for Conservation of Nature (IUCN) as 'endangered'. Translocation of threatened A. pallipes populations to isolated 'Ark sites' where threats are minimised is an increasingly used conservation tool. A full feasibility assessment of potential Ark sites, including an assessment of habitat suitability, is recommended within translocation guidelines developed by the IUCN. This literature review employed a systematic search and 'vote counting' approach to identify and assess the relative importance of physical habitat requirements of A. pallipes. Many habitat features were positively associated with crayfish presence, in particular: boulder substrate, trees/shading, woody debris, exposed roots, and undercut banks; and habitat use patterns varied among crayfish sexes and size classes. Ark sites should incorporate heterogeneous habitat, with as many of these features as possible, to provide both ample refugia and rich foraging areas.Keywords: freshwater / habitat suitability / translocation / conservation / aquatic invertebrate Résumé -Utilisation de l'habitat par le complexe d'espèces d'Austropotamobius, écrevisses à pieds blancs menacées : revue systématique. La compréhension des besoins en matière d'habitat est un élément clé de la conservation des espèces en déclin, en particulier lorsque des réintroductions sont prévues dans le cadre de la stratégie de restauration. L'écrevisse à pieds blancs (Austropotamobius pallipes) a subi de graves déclins dans toute son aire de répartition et est maintenant classée en « espèce en danger ». La translocation des populations d'A. pallipes menacées vers des « sites Ark » isolés où les menaces sont minimisées est un outil de conservation de plus en plus utilisé. Une évaluation complète de la faisabilité des sites 'Ark' potentiels, y compris une évaluation de l'aptitude des habitats, est recommandée dans les lignes directrices sur la translocation élaborées par l'UICN. Cette revue de littérature a fait appel à une recherche systématique et à une méthode de 'vote counting' pour identifier et évaluer l'importance relative des besoins en matière d'habitat physique d'A. pallipes. De nombreuses caractéristiques de l'habitat ont été positivement associées à la présence d'écrevisses, notamment : substrat de blocs, arbres / ombrage, débris ligneux, racines exposées et berges surplombantes ; et les habitudes d'utilisation de l'habitat varient selon les sexes et les classes de taille des écrevisses. Les sites Ark devraient intégrer un habitat hétérogène, avec autant de ces caractéristiques que possible, pour fournir à la fois suffisamment de refuges et de riches zones de ravitaillement.Mots clés : eau douce / habitat adéquat / translocation / préservation / invertébré aquatique

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Section: Water Chemistrymentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Water Chemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Habitat use by the endangered white-clawed crayfishAustropotamobiusspecies complex: a systematic review

Rosewarne

Mortimer

Dunn

2017

Knowl. Manag. Aquat. Ecosyst.

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“…[7][8][9], but since these reviews lack formally peer-reviewed and published protocols, these works lack the traceability of systematic reviews. Systematic review methods, therefore, offer a high degree of transparency and verifiability where an update is needed.…”

Section: Introductionmentioning

confidence: 99%

Updating and amending systematic reviews and systematic maps in environmental management

et al. 2016

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Systematic reviews and systematic maps aim to provide an overview of the best available evidence to inform research, policy and practice. However, like any form of review, they will require updating periodically to ensure that the most recent evidence has been incorporated. Here we outline two types of review revisions as recognised in medicine: updates and amendments. Updates involve a search for new studies, expanding the evidence base through time. Any other change (e.g. in screening or synthesis) or correction to the original report is an amendment. Decisions as to whether/when it is appropriate to undertake an update or amendment must be made on a case-bycase basis, considering issues such as the reliability and scope of the existing review or map, likely volume of new evidence, resources available, and the likely value of including new information. Careful, consistent reporting is necessary to ensure transparency and repeatability, particularly where there are deviations from the original methods, and authors should highlight key advances relative to the original report. Updating environmental systematic reviews and maps will be an increasingly important activity as the numbers of both primary studies and synthetic reports in the literature continue to grow.

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The use of Chara spp. (Charales: Characeae) as a bioindicator of physico‐chemical habitat suitability for an endangered crayfish Austropotamobius pallipes in lentic waters

Beaune¹,

Sellier²,

Lambert

et al. 2017

Aquatic Conservation

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Austropotamobius pallipes is an endangered decapod attracting much attention in freshwater conservation programmes. In some cases population transfers or reintroductions are carried out in lentic ecosystems such as ponds or quarries. Such conservation actions require rapid, low cost and powerful tools to census suitable habitat. Some species of the Characeae family (Chara spp.), share ecological needs with A. pallipes and are proposed as bioindicators of suitable habitat. Chara species were tested, among other plants, as bioindicators, and to see whether Chara species are a stronger indicator than water chemistry. The Pinail Nature Reserve, with 3000 permanent ponds, is inhabited by white‐clawed crayfish probably introduced historically into ponds used for fish production. This allows a replicated study of suitable habitats where plant communities are bioindicators of crayfish presence. Crayfish presence is associated with Chara species (such as Chara aspera, Chara virgata, Chara fragifera, Chara polyacantha and Chara vulgaris). Austropotamobius pallipes is present in ponds with Chara spp. (N = 10/10) while other ponds without crayfish are lacking charophytes (N = 1/23). Algae of the genus Chara are thus a simple and low‐cost additional tool for determining suitable habitat for crayfish introductions within enclosed waters protected from exotic invasive species and disease. Cladium mariscus also appears to be another useful bioindicator for crayfish habitat.

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Water chemistry and endangered white-clawed Crayfish: a literature review and field study of water chemistry association inAustropotamobius pallipes

Cited by 9 publications

References 57 publications

Habitat use by the endangered white-clawed crayfishAustropotamobiusspecies complex: a systematic review

Habitat use by the endangered white-clawed crayfishAustropotamobiusspecies complex: a systematic review

Updating and amending systematic reviews and systematic maps in environmental management

The use of Chara spp. (Charales: Characeae) as a bioindicator of physico‐chemical habitat suitability for an endangered crayfish Austropotamobius pallipes in lentic waters

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