Crayfish plague and management strategies in Norway

Taugbøl, Trond; Skurdal, Jostein; Håstein, Tore

doi:10.1016/0006-3207(93)90076-d

Cited by 49 publications

(37 citation statements)

References 8 publications

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“…Four watercourses in Norway have been affected by the crayfish plague (TAUGBØL et al, 1993). The first outbreak was reported in 1971-74 in the Veksa/Vrangselva watercourse (HÅSTEIN and UNESTAM, 1972;HÅSTEIN and LUND, 1978).…”

Section: Crayfish Plague In Norwaymentioning

confidence: 99%

“…Based on diving investigations, reports of crayfish mortalities, cage experiments and knowledge of previous crayfish distribution, plague affected areas were defined in the Glomma-and Halden watercourses (TAUGBØL et al, 1993). In Glomma the crayfish disappeared in the main river downstream of the village of Kirkenaer and in the connected lakes Vingersjøen and Storsjøen.…”

Section: Crayfish Plague In Norwaymentioning

confidence: 99%

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Reintroduction of Noble Crayfish Astacus Astacus After Crayfish Plague in Norway

Taugbøl¹

2004

Bull. Fr. Pêche Piscic.

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The Glomma and Halden watercourses in Norway were hit by crayfish plague in 1987 and 1989. Reintroduction of the noble crayfish started in 1989 in the Glomma and in 1995 in the Halden watercourse. Norway has especially good conditions for reintroduction of the native crayfish after crayfish plague, as there is no alien plague-carrying crayfish species in the country.In the Glomma watercourse, approx. 15 000 adult crayfish and 10 000 juveniles have been stocked while in the Halden watercourse the figures are 19 000 adults and 26 500 juveniles. All stocking sites were previously regarded as very good crayfish localities. Four years after stocking, natural recruitment was recorded at all adult crayfish stocking sites in the Glomma watercourse and at most sites in the Halden watercourse. Current crayfish density is, however, much lower than pre-plague densities even at the sites where population development has been in progress for more than 10 years.Extensive post-stocking movements were recorded among adult crayfish. Some sites seemed more suitable for settling, resulting in a great variation in CPUE between the different test-fishing sites. Juveniles seem more appropriate as stocking material if the goal is to re-establish a population in a particular area, due to their stationary behaviour, which seems to remain as they grow larger.

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Section: Crayfish Plague In Norwaymentioning

confidence: 99%

Section: Crayfish Plague In Norwaymentioning

confidence: 99%

Reintroduction of Noble Crayfish Astacus Astacus After Crayfish Plague in Norway

Taugbøl¹

2004

Bull. Fr. Pêche Piscic.

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“…Measures to reintroduce native European crayfish into surface waters have been suggested as a crucial part of management and conservation strategies in Europe (TAUGBOL et al, 1992;REYNOLDS, 1997;DEHUS et al, 1999). However, there is still a considerable uncertainty on how such actions should actually be performed and what questions should be answered related to reintroduction or restocking exercises.…”

Section: Introductionmentioning

confidence: 99%

Roundtable Session 4a: Management: Reintroductions and Restocking.

Schulz¹,

Stucki²,

Souty‐Grosset³

2002

Bull. Fr. Pêche Piscic.

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The present paper summarizes the outcome of a roundtable discussion on reintroductions or restocking as a management strategy for native European crayfish, which took place during the European Crayfish conference in Poitiers, France in September 2001.Aspects related to the suitability of the target habitat, the stocking material and the stocking procedure itself are important to consider during any reintroduction measure: Apart from general water quality and structural parameters, a suitable habitat is ideally geographically isolated from other surface waters and human activities such as intensive fishing pressure. However, it is of striking importance to make sure that the target habitat is free of crayfish plague, e.g. by experimental in situ exposure of native specimens. Overexploitation should be avoided if the stocking material originates from other surface waters and genetic aspects should be considered in stocking material originating from both natural surface waters and crayfish farms. Information for the stocking procedure itself are summarized from experiences gathered in various European countries.As an overall result of the discussion, the following three key questions related to reintroductions of native crayfish arised: 1. Why are the native crayfish not present (anymore) in the target habitat? 2. Do native crayfish survive in situ exposure as a test for crayfish plague? 3. Is the reintroduction or restocking measure successful in establishing a self-sustaining stock of native crayfish?

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“…Various plans for conservation and restoration of the indigenous freshwater crayfish have been implemented in Europe (Taugbl et al, 1993;Die´guez-Uribeondo et al, 1997a;Holdich and Rogers, 1997;Reynolds, 1997;Fu¨reder et al, 2002;Salvidio et al, 2002). Conservation strategies rely on a good understanding of the genetic structure of populations since genetic diversity is the basis for evolutionary potential to adapt to changing environments (Avise, 1994;Avise and Hamrick, 1996).…”

Section: Introductionmentioning

confidence: 99%

Low genetic variability of the white‐clawed crayfish in the Iberian Peninsula: its origin and management implications

Diéguez-Uribeondo

Royo

Souty‐Grosset

et al. 2007

Aquatic Conservation

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1. A study on the genetic variability of the white-clawed crayfish was carried out based on mitochondrial cytochrome oxidase subunit I gene sequences. The sequences applied were more informative regarding white-clawed crayfish genetic variability than others previously used.2. Two haplotypes were found to exist in the Iberian Peninsula. The haplotypes exhibit a strong geographic subdivision (F ST ¼ 0:83). One of the Iberian haplotypes was similar to north Italian haplotypes and the second differed in only one mutation. This pattern of genetic variability contrasts with those found in glacial refugial areas of France, Italy and the Balkan Peninsula.3. Two hypotheses on the origin of the white-clawed crayfish in the Iberian Peninsula are discussed: (i) one based on an anthropogenic origin, and (ii) a second based on a successive number of postglacial ancient and recent bottlenecks, i.e. the disjunction between Iberian and Italian populations of white-clawed crayfish species is due to competition between A. italicus and A. pallipes, in addition to the impact of crayfish plague and human translocations.4. New references for the white-clawed crayfish in the Iberian Peninsula were found in medieval and Arabic texts. The results show that this species has been thriving in this peninsula since ancient periods and that its indigenous status should not be questioned.5. Conservation action and plans should consider the low genetic diversity as a limitation for farmraising specimens more adapted and resistant to changing environments and diseases.

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Crayfish plague and management strategies in Norway

Cited by 49 publications

References 8 publications

Reintroduction of Noble Crayfish Astacus Astacus After Crayfish Plague in Norway

Reintroduction of Noble Crayfish Astacus Astacus After Crayfish Plague in Norway

Roundtable Session 4a: Management: Reintroductions and Restocking.

Low genetic variability of the white‐clawed crayfish in the Iberian Peninsula: its origin and management implications

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