Influence of light and temperature on reproduction and moulting frequency of the crayfish, Astacus astacus L.

Westin, Lars; Gydemo, Rolf

doi:10.1016/0044-8486(86)90106-7

Cited by 37 publications

(14 citation statements)

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“…Apart from this incubation of eggs, ACKEFORS (1993), CUKERZIS et al (1978), CUKERZIS (1988, 1989), CELADA et al (1988, KÖKSAL (1988), MACKEVIÈIENË et al (1997, MASON (1977), PÉREZ et al (1998PÉREZ et al ( , 1999, REYNOLDS et al (1992) and RHODES (1981), describe the approach to controlled incubation of eggs by means of controlling the water temperature. The importance of temperature to the egg development of crayfish is well documented (WESTIN and GYDEMO, 1986;CUKERZIS, 1989;CELADA et al, 1988;CARRAL et al, 1992). There are methods of speeding up the embryonic development and achieving earlier hatching of the juveniles (ACKEFORS, 1993;CUKERZIS et al, 1978;CUKERZIS, 1989;HESSEN et al, 1987;MACKEVIÈIENË et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Egg Incubation in the Noble Crayfish (Astacus Astacus L.): The Effect of Controlled Laboratory and Outdoor Ambient Condition on Hatching Success, Growth and Survival Rate of Juveniles

Policar¹,

Simon

Kozák³

2004

Bull. Fr. Pêche Piscic.

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The incubation of eggs on pleopods of 13 female noble crayfish was controlled by means of water temperature after CUKERZIS et al. (1978). Out-door incubation of eggs on pleopods of 15 females was monitored at ambient temperature in an earthen storage pond. With controlled incubation of eggs, the duration of incubation period was shortened and earlier hatching resulted in so-called advanced juveniles. They hatched 88 days earlier than those normally hatched during out-door egg incubation. These 88 days prolonged the rearing period of advanced juvenile crayfish in the 1 st growing season. When the advanced juvenile crayfish were isolated, there resulted a significantly lower number of stage 2 juveniles per female kept under controlled conditions (47 ± 25.0 individuals of stage 2 juveniles per female) compared to those females placed under out-door conditions (90.1 ± 46.9 individuals of stage 2 juveniles per female). Two females lost all eggs during controlled egg incubation, while no females lost all eggs during out-door egg incubation.After hatching, both groups (advanced and normally hatched juveniles) were provided with identical rearing conditions. Growth and survival rate were checked regularly. The advanced juvenile crayfish always reached significantly higher size in the given period than those normally hatched because they were 88 days older. At the end of rearing period (beginning of October), the advanced juveniles reached 26.0 ± 3.06 mm mean body length and 0.585 ± 0.197 g mean weight. In contrast, normally hatched juveniles reached 21.3 ± 2.25 mm mean body length and 0.305 ± 0.101 g mean weight. Comparing the growth of juveniles at a given age, the advance juveniles showed slower growth rate than those hatched normally. The advanced juveniles at 90 days of age (20.2 ± 1.83 mm mean body length, 0.207 ± 0.058 g mean weight) had significantly slower growth than those hatched normally (21.3 ± 2.25 mm mean body length, 0.305 ± 0.101 g mean weight). Apart from slower growth, the advanced juveniles also had a lower survival rate in the rearing period. In 90 days of age, the advanced juveniles showed 21% less survival rate than the normally hatched juveniles. Key-words:Astacus astacus, noble crayfish, controlled and out-door egg incubation, rearing, growth, survival, juveniles. INCUBATION DES OEUFS DE L'ÉCREVISSE À PATTES ROUGES (ASTACUS ASTACUS L.) : EFFETS DES CONDITIONS DE LABORATOIRE ET DES CONDITIONS EXTÉRIEURES AMBIANTES SUR LES TAUX D'ÉCLOSION, DE CROISSANCE ET DE SURVIE DES JUVÉNILES RÉSUMÉL'incubation des oeufs sous les pléopodes de 13 femelles d'écrevisse à pattes rouges a été contrôlée au moyen de la température de l'eau d'après CUKERZIS et al. (1978). L'incubation en milieu extérieur des oeufs sous les pléopodes de 15 femelles a été suivie en condition thermique ambiante dans des étangs de stockage en terre. Avec une incubation contrôlée des oeufs, la durée de la période d'incubation a été raccourcie et une éclosion précoce a permis la production de juvéniles précoces. Ils éclosent 88 jour...

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Section: Introductionmentioning

confidence: 99%

Egg Incubation in the Noble Crayfish (Astacus Astacus L.): The Effect of Controlled Laboratory and Outdoor Ambient Condition on Hatching Success, Growth and Survival Rate of Juveniles

Policar¹,

Simon

Kozák³

2004

Bull. Fr. Pêche Piscic.

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“…In Sweden mating occurred during September and October (WESTIN and GYDEMO, 1986) and October and November (ACKEFORS, 1999), while in Finland during September and October (HUNER and LINDQVIST, 1986). It can be therefore concluded, that in Croatia mating starts later in comparison to the Northern Europe, most probably due to prolonged period of higher water temperatures in the autumn.…”

Section: Discussionmentioning

confidence: 99%

“…Mating and spawning is not fixed to a specific temperature or date, but a higher temperature delays the onset of mating. Mating takes place in autumn, during September and October (HUNER and LINDQVIST, 1986;WESTIN and GYDEMO, 1986) and usually lasts for 2 to 3 weeks. Extrusion and fertilisation of eggs depends on the time of mating and water temperature and occurs in period from a few hours to up to 6 weeks after mating.…”

Section: Introductionmentioning

confidence: 99%

Annual Activity of the Noble Crayfish (Astacus Astacus) in the Orljava River (Croatia)

Faller¹,

Maguire

Klobučar

2006

Bull. Fr. Pêche Piscic.

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We studied the annual activity of the noble crayfish (Astacus astacus) at three sites along the Orljava River, in the continental part of Croatia, between August 2003 and September 2004. Each site represented the typical characteristics of the upper, middle and lower section of the river (5, 24 and 37 km from the spring, respectively). The biggest population size was recorded on the most upstream site, with greatest structural variability of bottom, high biotic index, and the lowest mean water temperature. Males dominated in catch during the whole research period (total sex ratio was 1.77 males: 1 female). The number of caught crayfish fluctuated during the year and their activity was positively correlated with the water temperature. The crayfish catch within the two downstream sites was dramatically lower in the autumn 2004 then the year before. No obvious reason could be found; therefore we concluded that this was probably result of natural fluctuations in population. Males were significantly longer than females on all three sites. Males and females had similar percentages of injuries, mainly on claws and antennae. Crayfish were active during the whole year, even when water temperature was just 1°C. Phases of life cycle (moulting, active cement glands, mating, hatchlings) occurred a month later in our population than in the Northern Europe populations, probably as a consequence of differences in the climate.

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“…From 11 th November onward, the temperature was reduced to 4°C over 18 days, according to a natural temperature gradient. In order to trigger egg development, the temperature was slowly increased after 13 days from 4°C to 13°C (Westin and Gydemo 1986) and eggs were stripped on the 14 th day of temperature increase. A constant diurnal rhythm of 10 hr day -1 that simulated the natural light duration and intensity of October and November (Bremerhaven, Germany, 10 hr 08 min day -1 ) was applied (Gerding 2013).…”

Section: Animal Maintenancementioning

confidence: 99%

“…They were maintained in a recirculating aquaculture system (RAS) in the Centre for Aquaculture Research at the Institute for Marine Resources in Bremerhaven, where experiments were conducted from September 2013 to March 2014. In order to trigger reproduction (Huner and Lindqvist 1985;Westin and Gydemo 1986), the temperature of the RAS was decreased stepwise (max. 1°C day -1 ) from 20°C to 11°C (Figure 1) starting on 25 th of September.…”

Section: Animal Maintenancementioning

confidence: 99%

Survival of Early Stripped Eggs of the Noble Crayfish, <i>Astacus astacu</i>, and Effects of Saline Solution During Artificial Incubation

Seemann

Lorkowski

Schiffer

et al. 2014

Freshwater Crayfish

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There is growing interest in using recirculating aquaculture systems (RAS) to produce juvenile noble crayfish, Astacus astacus (Linnaeus), a valuable and once plentiful food species in Europe, now a highly endangered species. The survival rates of early stripped eggs of A. astacus were compared across anti-fungal treatments in an artificial RAS incubation system based on a saline bath of approx. 20 -22 mS cm -1 or 15 -16 PSU over two different durations. Time from fertilisation to hatching was 82 days or 1191 degreedays. Low survival rates (live successfully hatched juveniles at end of experimental period) between 11.0 ± 9.5% and 26.6 ± 3.7% were obtained. Survival was significantly affected by the duration of egg bath within the saline solution with twice as high survival rates when eggs were saline-bathed once every two days for five minutes in comparison to eggs without treatment. Fungal rates were significantly affected by treating the eggs with a saline solution with infection rates decreasing from 3.7 ± 1.0% to 0.8 ± 0.5% in the ten minute saline bath treatment. Appropriately applied saline bathing can markedly improve survival of early-stripped noble crayfish eggs. However, further research is required to determine whether viable levels of hatching success can be obtained using early stripping and saline treatment.

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Influence of light and temperature on reproduction and moulting frequency of the crayfish, Astacus astacus L.

Cited by 37 publications

References 1 publication

Egg Incubation in the Noble Crayfish (Astacus Astacus L.): The Effect of Controlled Laboratory and Outdoor Ambient Condition on Hatching Success, Growth and Survival Rate of Juveniles

Egg Incubation in the Noble Crayfish (Astacus Astacus L.): The Effect of Controlled Laboratory and Outdoor Ambient Condition on Hatching Success, Growth and Survival Rate of Juveniles

Annual Activity of the Noble Crayfish (Astacus Astacus) in the Orljava River (Croatia)

Survival of Early Stripped Eggs of the Noble Crayfish, <i>Astacus astacu</i>, and Effects of Saline Solution During Artificial Incubation

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