Managing an Abundant Crayfish Resource for Conservation -A. Pallipes in Ireland

Demers, Andréanne; Marnell, Ferdia

doi:10.1051/kmae:2002070

Cited by 20 publications

(11 citation statements)

References 19 publications

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“…British legislation provides "no-go" areas where NICS may not be introduced, but still allows some importation and movement of non-indigenous stocks, for example the sale of live crayfish over the counter for human consumption, except in Scotland (Bean et al, 2006). In Ireland, fisheries legislation prohibits importation of NICS (Gibson, 1979;Reynolds et al, 2002), to protect the valuable salmonid stocks. Northern Ireland, while being part of the UK, cooperates with the Irish Republic on this.…”

Section: Legislation and Conservation Measuresmentioning

confidence: 99%

A review of the ever increasing threat to European crayfish from non-indigenous crayfish species

Holdich¹,

Reynolds

Souty‐Grosset

et al. 2009

Knowl. Managt. Aquatic Ecosyst.

385

467

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Section: Legislation and Conservation Measuresmentioning

confidence: 99%

A review of the ever increasing threat to European crayfish from non-indigenous crayfish species

Holdich¹,

Reynolds

Souty‐Grosset

et al. 2009

Knowl. Managt. Aquatic Ecosyst.

385

467

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“…Captive breeding of white-clawed crayfish, Austropotamobius pallipes (Lereboullet) can be considered such as an effective method for conservation and restoration of this endangered crayfish species (Reynolds, 1998;Reynolds et al, 2002;Policar et al, 2010). Effective production of juveniles in A. pallipes for reintroduction has used the artificial egg incubation (AI) of eggs (Policar et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Sodium chloride as effective antifungal treatment for artificial egg incubation inAustropotamobius pallipes

Policar

Smyth²,

Flanigan³

et al. 2011

Knowl. Managt. Aquatic Ecosyst.

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Key-words:formaldehyde, fungicide treatment, hatching, sodium chloride, white-clawed crayfishIn this study, sodium chloride at three different concentrations, 30 000 ppm (S30), 60 000 ppm (S60) and 90 000 ppm (S90), and formaldehyde at one concentration, 3000 ppm (F), were tested as antifungal chemicals during artificial incubation (AI) of Austropotamobius pallipes eggs. Two treatments were tested without chemicals as control groups with (R) and without (C) the removal of dead eggs. After AI, formaldehyde treatment ensured high survival of stage 1 (89.7 ± 2.3%) and stage 2 (85.5 ± 2.4%) of juveniles. However, comparable survival rate to stage 1 and stage 2 (85.5 ± 5.5% and 80.6 ± 3.2%) were also found in the treatment with the highest sodium chloride concentration (S90). Significantly lower survival rate of juveniles (stage 1: 60.6−70.3% and stage 2: 56.1−67.3%) were evident in groups S60, S30 and R. However, group R demanded high labor and related costs. The lowest juvenile survival levels to stage 1 (46.4 ± 8.2%) and stage 2 (45.2 ± 6.8%) were observed in treatments without fungicide chemicals and removal of dead eggs (C). RÉSUMÉLe chlorure de sodium comme traitement antifongique efficace dans l'incubation artificielle des oeufs d'Austropotamobius pallipes Mots-clés :formaldéhyde, traitement antifongique, éclosion, chlorure de sodium, écrevisse à pieds blancs Dans cette étude, le chlorure de sodium à trois différentes concentrations, 30 000 ppm (S30), 60 000 ppm (S60) et 90 000 ppm (S90), et le formol à une concentration de 3000 ppm (F) ont été testés comme produits antifongiques pendant l'incubation artificielle (AI) d'oeufs d'Austropotamobius pallipes. Deux traitements ont été testés sans produits antifongiques comme témoins avec (R) et sans (C) retrait des oeufs morts. Après incubation artificielle, le traitement au formol assure une survie élevée au stade 1 (89,7 ± 2,3 %) et au stade 2 (85,5 ± 2,4 %) des juvéniles. Toutefois, un taux de survie comparable au stade 1 et 2 (85,5 ± 5,5 % et 80,6 ± 3,2 %) a été trouvé avec le traitement à la plus forte concentration en chlorure de sodium (S90). Un taux de survie significativement plus faible des juvéniles (stade 1 : 60,6−70,3 % et stade 2 : 56,1− 67,3 %) est observé pour les groupes S60, S30 et R. Mais le groupe R demande un gros travail coûteux. Les survies les plus faibles des juvéniles au stade 1 (46,4 ± 8,2 %) et au stade 2 (45,2 ± 6,8 %) sont observées en l'absence de traitement chimique et de retrait des oeufs (C).

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“…The white clawed crayfish, Austropotamobius pallipes (Lereboullet) is an endangered species in Western Europe (Reynolds et al, 2002) and this species is also regarded as an heritage species (Füreder and Reynolds, 2003). Methods such as captive breeding and ranching using local stocks of A. pallipes can be useful during conservation and reintroduction of this species (Reynolds et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Methods such as captive breeding and ranching using local stocks of A. pallipes can be useful during conservation and reintroduction of this species (Reynolds et al, 2002). Ireland, the only country in Europe with A. pallipes free from non-native crayfish (Demers et al, 2005), can be considered as a safe place for production of A. pallipes for future European restocking programs (Policar et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Ireland, the only country in Europe with A. pallipes free from non-native crayfish (Demers et al, 2005), can be considered as a safe place for production of A. pallipes for future European restocking programs (Policar et al, 2008). The Irish strain of A. pallipes is genetically close to those in Great Britain and Western France and this stock could be used mainly in this area (Reynolds et al, 2002). Captive breeding of A. pallipes for stock restoration including mating and egg laying (Reynolds et al, 1992;Carral et al, 1994Carral et al, , 2000, maternal (Carral et al, 2000;Celada et al, 2001) and artificial egg incubation (Perez et al, 1998a(Perez et al, , 1998b(Perez et al, , 1999Carral et al, 2003Carral et al, , 2004, embryonic development study (Celada et al, 1991) and juvenile culture under controlled conditions Policar et al, to appear), was first established in Ireland during 2007-2008(Policar et al, 2008.…”

Section: Introductionmentioning

confidence: 99%

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The effect of different cold period during maternal incubation on incubation efficiency and hatching term inAustropotamobius pallipes

Policar

Smyth²,

Flanigan³

et al. 2009

Knowl. Managt. Aquatic Ecosyst.

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Key-words:white-clawed crayfish, egg, temperature, hatching, survival rate This study tested the effect on the incubation efficiency (E in %) and hatching term during maternal incubation of Austropotamobius pallipes of five different cold periods (duration: 45, 60, 75, 90 and 105 days) under controlled conditions and one group maintained under ambient Irish water temperatures. The six different durations of cold period, used in this study, caused six different terms of hatching from 16 March to 29 June. When compared to the group held under ambient Irish conditions with fluctuating water temperatures during the incubation period (E = 29.9 ± 4.5%), higher incubation efficiency was found in all groups under the controlled conditions (E = 73.1 ± 4.7%−41.3 ± 2.7%). In groups under controlled conditions, a positive effect of shortened cold period on incubation efficiency was found, with the highest efficiency (E = 73.1 ± 4.7%−68.8 ± 5.2%) found after the shortest cold period, while the longest cold period led to the lowest efficiency (E = 41.3 ± 2.7%). RÉSUMÉ L'effet de différentes périodes froides pendant l'incubation maternelle sur l'efficacité de l'incubation et la date d'éclosion chez Austropotamobius pallipes Mots-clés :écrevisse à pattes blanches, oeufs, température, éclosion, taux de survie Cette étude a testé l'effet, sur l'efficacité d'incubation (E en %) et la date d'éclo-sion pendant l'incubation maternelle chez Austropotamobius pallipes, de cinq périodes de froid différentes (durées : 45, 60, 75, 90 et 105 jours) en conditions contrôlées comparées à un groupe maintenu à température ambiante des eaux irlandaises. Les six différentes périodes froides, utilisées dans cette étude, conduisent à six dates d'éclosion du 16 mars au 29 juin. Quand on compare au groupe maintenu sous conditions ambiantes irlandaises comportant des variations de température pendant l'incubation (E = 29,9 ± 4,5 %), une meilleure efficacité d'incubation a été trouvée pour tous les groupes en conditions contrôlées (E = 73,1 ± 4,7 %−41,3 ± 2,7 %). Dans les groupes en conditions contrôlées, un effet positif des courtes périodes froides sur l'efficacité d'incubation a été trouvé, avec la plus forte efficacité (E = 73,1 ± 4,7 %−68,8 ± 5,2) trouvée après la période froide la plus courte, alors que l'efficacité est la plus faible (E = 41,3 ± 2,7 %) pour la période froide la plus longue.

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Managing an Abundant Crayfish Resource for Conservation -A. Pallipes in Ireland

Cited by 20 publications

References 19 publications

A review of the ever increasing threat to European crayfish from non-indigenous crayfish species

A review of the ever increasing threat to European crayfish from non-indigenous crayfish species

Sodium chloride as effective antifungal treatment for artificial egg incubation inAustropotamobius pallipes

The effect of different cold period during maternal incubation on incubation efficiency and hatching term inAustropotamobius pallipes

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