Effects of thermic manipulation throughout egg development on the reproductive efficiency of the freshwater crayfish (Pacifastacus leniusculus Dana)

Celada, J.D.; Carral, J.M.; Gaudioso, V. R.; Temiño, C.; Fernández, Rodrigo Pérez

doi:10.1016/0044-8486(88)90222-0

Cited by 27 publications

(21 citation statements)

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“…Lower temperatures during the beginning of maternal egg incubation (i.e. earlier cold period) decreases activity of berried females and egg losses of freshly developing eggs, that are mainly caused at higher temperatures by aggressive behavior among females (Cukerzis et al, 1978;Celada et al, 1988). This result was confirmed by our study, when all cold periods under controlled conditions had positive effects on the incubation efficiency compared to that of the group kept under ambient temperature.…”

Section: Discussionsupporting

confidence: 86%

“…Application of different cold periods during the incubation yielded different hatching terms and batches of juveniles for ongrowing as in Perez et al (1998a) and Celada et al (2001). This benefit of different thermal regime during the incubation can help breeders better utilize hatchery capacity or equipment and can provide year-round production of crayfish in the future (Celada et al, 1988;Perez et al, 1998a).…”

Section: Discussionmentioning

confidence: 99%

“…Controlled temperature of these groups included initial (6.1±1.3 • C), cold (4.5± 0.3 • C), medium (9.0±0.5 • C) and warm (18.0±0.5 • C) periods during the incubation. The initial period of incubation was reduced (Celada et al, 1988) and the cold period was used early for a modulation of berried females during the incubation when eggs were in embryonic phase II. During the incubation, groups with controlled water conditions, were subjected to different durations of cold period, from 45 days (group 1) to 105 days (group 5).…”

Section: > Experimental Conditionsmentioning

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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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: > Experimental Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

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.

View full text Add to dashboard Cite

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“…The egg number decreases throughout the embryonic development (MASON, 1977;CELADA et al, 1988;WOODLOCK and REYNOLDS, 1988;SKURDAL, 1990a, 1990b;REYNOLDS et al, 1992) and thus the period lapsed from spawning should be considered when data obtained by different authors are compared.…”

Section: Introductionmentioning

confidence: 99%

Pleopodal Egg Production of the White-Clawed Crayfish Austropotamobius Pallipes Lereboullet Under Laboratory Conditions: Relationship Between Egg Number, Egg Diameter and Female Size

Sáez‐Royuela¹,

Carral²,

Celada³

et al. 2006

Bull. Fr. Pêche Piscic.

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Reproductive data from a total number of 1296 adult white-clawed crayfish (864 females mean carapace length size 3.36 ± 0.49 cm and 432 males mean carapace length size 3.66 ± 0.38 cm) are reported. In a 10-year period, crayfish from wild populations caught in mid September were kept under indoor laboratory conditions where mating and spawning took place. Broodstock mortality was low: 5% in females and 1.1% in males. From the initial number of females, 771 mated (89.2%) and 721 spawned (83.4%). Pleopodal eggs were counted without removal between 3 and 20 days after spawning and mean number was 73.5 ± 34.1 (range 14-220). Egg diameter of 94 females was measured giving a mean value of 2.39 ± 0.015 mm (range 2.08-2.79 mm). Correlations between female size (carapace length CL), number of pleopodal eggs and egg diameter were made.Key-words: white-clawed crayfish, reproduction, fecundity. PRODUCTION DES OEUFS PLÉOPODAUX DE L'ÉCREVISSE À PIEDS BLANCS AUSTROPOTAMOBIUS PALLIPES LEREBOULLET DANS LES CONDITIONS DE LABORATOIRE : RELATION ENTRE LE NOMBRE D'OEUFS, LE DIAMÈTRE DES OEUFS ET LA TAILLE DE LA FEMELLE RÉSUMÉLes données reproductrices d'un nombre total de 1296 écrevisses à pieds blancs adultes (864 femelles avec une carapace de longueur moyenne de 3,36 ± 0,49 cm et 432 mâles avec une carapace de longueur moyenne de 3,66 ± 0,38 cm) sont incluses. Sur une période de 10 ans, des écrevisses de populations sauvages ont été capturées à la mi septembre et gardées en laboratoire où elles se sont accouplées et reproduites. La mortalité du stock de reproduction était faible: 5 % pour les femelles et 1,1 % pour les mâles. Sur le nombre initial de femelles, 771 se sont accouplées (89,2 %) et 721 ont frayé (83,4 %). Les oeufs pléopodaux ont été comptés sans élimination entre 3 et 20 jours après la fraie et le nombre moyen d'oeufs par femelle était de 73,5 ± 34,1 (intervalle de 14 à 220). Le diamètre des oeufs de 94 femelles a été mesuré, donnant une valeur moyenne de 2,39 ± 0,015 millimètre (intervalle de 2,08 à 2,79 millimètres). Les corrélations entre la taille de la femelle (CL, longueur de la carapace), le nombre d'oeufs pléopodaux et le diamètre des oeufs pléopodaux ont été calculées.

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“…Under maternal incubation, aggressive interactions among breeders, handling, poor egg attachment and female diseases led to egg detachment and mortality (CELADA et al, 1988(CELADA et al, , 2001aWOODLOCK and REYNOLDS, 1988;CARRAL et al, 1994). Also death of females results in a total loss of pleopodal eggs.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dead Egg Removal Frequency on Stage 2 Juvenile Production in Artificial Incubation of Austropotamobius Pallipes Lereboullet

Celada

Sáez‐Royuela

Aguilera

2004

Bull. Fr. Pêche Piscic.

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In artificial incubation (AI) of astacid species, which have a long embryonic development, eggs have to remain during long periods without maternal care and it is recommended to remove the dead ones. With the aim to test the effect on final stage 2 juvenile production of different removal frequencies, four treatments were tested: removal every 4 days, every 7 days, every 10 days and no removal. Using an egg density of 2.2 eggs/cm 2 , stage 2 juvenile production rate was significantly better (70.3%) with removal every four days than with less frequent removals. However there were not detected statistical differences between the control (no egg removal) and the other treatments. The relatively low incubation density (2.2 eggs/cm 2 ) could partially explain the general good results achieved, even when dead eggs were not removed. Key-words:White-clawed crayfish, artificial incubation, juvenile production. EFFETS DE LA FRÉQUENCE D'ENLÈVEMENT DES OEUFS MORTS SUR LA PRODUCTION DE JUVÉNILES STADE 2 DANS L'INCUBATION ARTIFICIELLE D'AUSTROPOTAMOBIUS PALLIPES LEREBOULLET RÉSUMÉLors de l'incubation artificielle (IA) d'espèces d'astacides, qui ont un développement embryonnaire long, les oeufs doivent rester longtemps sans soins maternels et il est recommandé d'enlever les morts. Dans le but de tester l'effet de différentes fréquences d'enlèvement des oeufs morts sur la production finale de juvénile stade 2, quatre traitements ont été testés : enlèvement tous les 4 jours, tous les 7 jours, tous les 10 jours et sans enlèvement. Avec une densité d'oeufs de 2,2 oeufs/cm 2 les taux de juvéniles stade 2 atteints lorsque l'enlèvement a été effectué tous les quatre jours ont été considérablement meilleurs (70,3 %) que ceux obtenus avec enlèvements moins fréquents. Cependant, il n'y a pas de différence statistique entre les résultats des incubations sans enlèvement des oeufs morts, et les autres. La densité d'incubation relativement basse (2,2 oeufs/cm 2 ) pourrait expliquer partiellement les bons résultats atteints, même lorsque les oeufs morts n'ont pas étés enlevés.

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Effects of thermic manipulation throughout egg development on the reproductive efficiency of the freshwater crayfish (Pacifastacus leniusculus Dana)

Cited by 27 publications

References 1 publication

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

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

Pleopodal Egg Production of the White-Clawed Crayfish Austropotamobius Pallipes Lereboullet Under Laboratory Conditions: Relationship Between Egg Number, Egg Diameter and Female Size

Effects of Dead Egg Removal Frequency on Stage 2 Juvenile Production in Artificial Incubation of Austropotamobius Pallipes Lereboullet

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