Sterol requirement of cultured juvenile crayfish, Pacifastacus leniusculus

D’Abramo, Louis R.; Wright, John; Wright, Katherine H.; Bordner, Clark E.; Conklin, Douglas E.

doi:10.1016/0044-8486(85)90083-3

Cited by 57 publications

(24 citation statements)

References 15 publications

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“…The survival percentages in the study being reported here were in the same range, but in this case growth improved. The weight reached by crayfish derived from either maternal or artificial incubation (535.70 mg and 780.13 mg after 80 days, respectively) was higher than figures reported hitherto (Ackefors et al 1992(Ackefors et al , 1995Celada et al 1993;D'Abramo et al 1985;Gydemo and Westin 1989;Henttonen et al 1993;Mason 1979;Nyström 1994;Sáez-Royuela et al 1995, 2007Savolainen et al 2003Savolainen et al , 2004Taugbøl and Skurdal 1992). This is probably due to the improved feeding achieved by adding a supplement of Artemia nauplii to the dry diet used.…”

Section: Discussioncontrasting

confidence: 60%

“…Since then, several studies have been performed with astacid juveniles produced by artificial incubation (Policar et al 2006;Sáez-Royuela et al 2007;Savolainen et al 2003Savolainen et al , 2004. Regardless of origin, survival and growth after 2-3 months of independent life under controlled conditions showed great variability and, in general, high mortality (Ackefors et al 1989;Celada et al 1989Celada et al , 1993D'Abramo et al 1985;Gydemo and Westin 1989;Nyström 1994;Sáez-Royuela et al 1995, 1996Savolainen et al 2003). From recent results , it can be deduced that live feed supplementation from the onset of external feeding guarantees viability during the first few months of life.…”

Section: Introductionmentioning

confidence: 98%

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The artificial incubation of crayfish eggs: review and report from an experimental study concerning the effects of offspring origin (maternal or artificial incubation) on the survival and growth of juvenile signal crayfish (Pacifastacus leniusculus, Astacidae)

González

Celada

García

et al. 2008

Rev Fish Biol Fisheries

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The development of artificial incubation techniques in astacid crayfish has attracted attention from scientists in many countries ever since the nineteenth century. It is only in the last few years that these techniques, along with studies on egg storage and transport, have provided reliable options for improving the reproductive phase in farming. The juveniles produced need to be reared until they reach a sufficient size both for restocking and for growing purposes. In view of the current level of knowledge of rearing juvenile astacids, two 80-day experiments were carried out under controlled conditions to compare the survival and growth of Stage 2 juvenile signal crayfish (Pacifastacus leniusculus) from two origins: maternal or artificial incubation. In the first experiment, three treatments were tested: juveniles from artificially incubated eggs with formaldehyde treatments, juveniles from maternal incubation and a mixture from both origins (50% each). Survival rates ranged from 87.8% to 93.3% with no significant differences among treatments. Crayfish from artificial incubation grew significantly faster (11.47 mm carapace length (CL), 373.80 mg weight) than crayfish from maternal incubation. In the second experiment, a bifactorial design included four treatments: the crayfish was derived from artificial or from maternal incubation and was fed once a day or twice a day. Final survival rates ranged from 68.89% to 77.78%, with no significant differences among treatments. Crayfish from artificial incubation grew significantly faster than crayfish from maternal incubation. The highest CL (14.54 mm) and weight (780.13 mg) were reached by the juveniles from artificial incubation that were fed once a day. No significant differences were found between the two feeding frequencies. Results showed that artificial incubation with formaldehyde treatments had no harmful effects and made it feasible to get a better performance from the juveniles obtained.

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Section: Discussioncontrasting

confidence: 60%

Section: Introductionmentioning

confidence: 98%

The artificial incubation of crayfish eggs: review and report from an experimental study concerning the effects of offspring origin (maternal or artificial incubation) on the survival and growth of juvenile signal crayfish (Pacifastacus leniusculus, Astacidae)

González

Celada

García

et al. 2008

Rev Fish Biol Fisheries

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“…Ackefors et al (1989) recommended 50 m -2 , whereas Gydemo and Westin (1989) suggested that 100 m -2 may be an adequate stocking density with enough shelters. The appropriate density for D' Abramo et al (1985) would be higher (150 m -2 ), but only for the first 30 days. If juveniles are kept in groups for a period of 3 or 4 months, Nyström (1994) assessed the initial concentration has to be\100 m -2 .…”

Section: Discussionmentioning

confidence: 97%

“…Several authors have carried out experiments with astacid crayfish at initial concentrations between 50 and 200 stage 2 juveniles per m 2 under controlled conditions but focussed on productive factors other than density (Mason 1979;D'Abramo et al 1985;Ackefors et al 1989;Gydemo and Westin 1989;Celada et al 1989Celada et al , 1993Taugbøl and Skurdal 1992;Ackefors et al 1992Ackefors et al , 1995Henttonen et al 1993;Blake et al 1994;Sáez-Royuela et al 1995, 1996, 2001Savolainen et al 2003). The studies of Ackefors et al (1989), Nyström (1994) and Savolainen et al (2004) have focussed on density effects.…”

Section: Discussionmentioning

confidence: 98%

“…Producción Animal, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain e-mail: rgonl@unileon.es of exogenous feeding. Fresh Daphnia, earthworms, chironomid larvae, Chlorella, fresh fish, vegetables and experimental dry pellets for crayfish and for fish species have been tried by Mason (1979), D'Abramo et al (1985), Celada et al (1989Celada et al ( , 1993, Blake et al (1994), Sáez-Royuela et al (1995, 1996 and Savolainen et al (2003Savolainen et al ( , 2004 with Pacifastacus leniusculus. Gydemo and Westin (1989), Ackefors et al (1989Ackefors et al ( , 1992Ackefors et al ( , 1995, Taugbøl and Skurdal (1992) and Henttonen et al (1993) used different combinations of frozen fish and vegetables, oat flakes, Chara, frozen insect larvae and Neomysis, fresh Mysis and formulated feedstuffs for other crustaceans with Astacus astacus, whereas Sáez-Royuela et al (2001) tested fresh Daphnia and a feed formulated for rainbow trout with Austropotamobius pallipes.…”

Section: Introductionmentioning

confidence: 98%

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Stocking density for the intensive rearing of juvenile crayfish, Pacifastacus leniusculus (Astacidae), using Artemia nauplii to supplement a dry diet from the onset of exogenous feeding

et al. 2009

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Recent advances in intensive rearing of astacid juvenile crayfish have greatly improved the results. This challenges the current application possibilities of the studies performed previously, and new research on density is required. A 100-day experiment was carried out under controlled conditions to evaluate density effects on survival and growth rates of juvenile crayfish in optimal conditions of feeding. Juvenile stage 2 Pacifastacus leniusculus were stocked in fibreglass tanks (1 m 2 , 200 l water) at 20 ± 1°C and fed a dry diet for salmonids supplemented with restricted amounts of Artemia nauplii. Stocking densities were 100, 300, 600 and 1,000 crayfish m -2 . Mean survival rate was reduced significantly with increased stocking density, ranging from 86.33% (100 m -2 ) to 39.13% (1,000 m -2 ). All checks showed that at the lowest initial density (100 m -2 ) animals grew significantly faster those at higher densities, recording a final carapace length of 15.28 mm and weight of 1.08 g. Among the treatments of 300, 600 and 1,000 m -2 no differences were found either in carapace length or in weight throughout the experimental period, with a final mean growth of 14 mm carapace length and 0.72 g weight. The final proportion of animals with chelae autotomy rose significantly with increasing stocking density, ranging from 14.44% (100 m -2 ) to 41.45% (1,000 m -2 ). This study shows that diet is a decisive factor for stocking successfully high densities under controlled conditions and provides useful information to set adequate densities in accordance with the production objectives.

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Lipids and Fatty Acids

Tocher

Glencross

2015

Dietary Nutrients, Additives, and Fish Health

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Sterol requirement of cultured juvenile crayfish, Pacifastacus leniusculus

Cited by 57 publications

References 15 publications

The artificial incubation of crayfish eggs: review and report from an experimental study concerning the effects of offspring origin (maternal or artificial incubation) on the survival and growth of juvenile signal crayfish (Pacifastacus leniusculus, Astacidae)

The artificial incubation of crayfish eggs: review and report from an experimental study concerning the effects of offspring origin (maternal or artificial incubation) on the survival and growth of juvenile signal crayfish (Pacifastacus leniusculus, Astacidae)

Stocking density for the intensive rearing of juvenile crayfish, Pacifastacus leniusculus (Astacidae), using Artemia nauplii to supplement a dry diet from the onset of exogenous feeding

Lipids and Fatty Acids

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