The influence of triploidy and heat and hydrostatic pressure shocks on the growth and reproductive development of juvenile yellow perch (Perca jlavescens)

Malison, Jeffrey A.; Procarione, Lynne S.; Held, James A.; Kayes, Terrence B.; Amundson, C. H.

doi:10.1016/0044-8486(93)90003-h

Cited by 52 publications

(29 citation statements)

References 32 publications

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“…1994); c) using Final stocking biomass: 31,34 and 31kg -'(after Mélard et al 1995b) recirculating systems to minimize hazards from pathologies ; tailoring the quality of the diet to the precise nutritional requirements of perch, essentially with respect to fatty acid content to minimize the risks of hepatic degeneration (Grignard et al 1996) and lower resistance to pathologies. Higher growth rates and lower size heterogeneity could be achieved through the production of a monosex female population (Malison et al 1986) or sterile triploïd fish (Malison et al 1993;Malison, 1995). Similarly, future investigations on…”

Section: Discussionmentioning

confidence: 99%

Intensive culture of juvenile and adult Eurasian perch (P. fluviatilis): effect of major biotic and abiotic factors on growth

1996

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SummaryRecent developments in Eurasian perch (Percafluuiatilis) larval rearing and weaning techniques allow large-scale intensive rearing tests, both with juveniles and adults. This review presents the results of experiments conducted in a commercial scale production environment (0.5-1.6m3 flow-through tanks) and focuses on the most relevant factors influencing growth and production in intensive rearing systems. Combined effects of food ration and temperature showed that the maximum growth rates (0.06-1.80 g fish-t day-l for 1-300 g fish) were observed at 23"C. The thermal range for intensive rearing of perch extends at least down to ll'C (growth rate equivalent to 29oÂ of that observed at 23"C). The maximum daily food ration (94.5% lipid;5744o/o crude protein) at23"C resulted in feed conversion rates from 1.1 to 2.0 in fish ranging from I to 1509 and was modelled as follows (R' :0.89): R-u* (7o duy-') : 7.60 w (weight, g)'". Juvenile (1-l5g) perch reared at 10000 fish m-3 showed a growth rate of 0.2 g fish I day ', thus 670Â higher than at 400 fish m-3. In the most intensive rearing trials (I24kgm 3), the maximum production rate observed was 2.6 kg -' day '.Growth heterogeneity constitutes a major constraint in perch culture. Size grading experiments resulted in the emergence of fast-growing fish in each sorted group. In addition, the sorting process caused the productivity to be slightly lower (5-6%) than in non-sorted populations of the same origin and body weight. Mass mortality may take place at any stage of perch rearing within the 1-200 g body weight range. In general, an overall 500% survival rate was recorded after 14 months. Parasites, bacteria and fungi were the most frequently encountered causes of mortality. The occurrence and impact of diseases were largely reduced in recirculating systems where the survival rate is 70o/o higher than the values observed in flow-through rearing systems. In intensive rearing systems at 23"C and at maximum stocking biomass of 50 kg --', 44-day-old weaned perch juveniles (ranging from 0.5 to 1g initial body weight) reached an average body weight of 130-150 g after 1 year of rearing. Still, this marketable size was reached about 3 months earlier by fast growing individuals within the population.The intensive culture of perch at a constant23"C water temperature allowed much higher growth rates than usually observed in conventional, extensive systems under natural thermal regimes. Constant temperatures also inhibited the sexual maturation in females. Further improvements in growth and productivity in intensive perch rearing will closely rely on techniques such as the selection of fast-growing strains, monosex female or sterile triploïd fish production.

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Section: Discussionmentioning

confidence: 99%

Intensive culture of juvenile and adult Eurasian perch (P. fluviatilis): effect of major biotic and abiotic factors on growth

1996

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“…NAM et al (2004) afirmam que a redução da produção de larvas em tratamentos com choques térmicos sequenciais (quente e frio), quando comparada com a resultante de ovos tratados com choque térmico único, é compensada pelo aumento do número de larvas tetraploides geradas pelo tratamento. Apesar de ainda desconhecidas as razões que impedem a primeira clivagem através da combinação de choques térmicos (NAM et al, 2004), os trabalhos que utilizaram choques térmicos únicos para induzir a tetraploidia de Misgurnus mizolepis (NAM et al, 1999;DITER et al, 1993;MALISON et al, 1993;YAMAZAKI e GOODIER, 1993) sempre produziram quantidades inferiores de tetraploides em relação àquelas resultantes de testes feitos com choques térmicos sequenciais (NAM et al, 2004).…”

Section: Discussionunclassified

Tetraploidia em Rhamdia quelen (Quoy e Gaimard, 1824) por choque térmico duplo (quente e frio)

Garcia

Júnior

Yasuy³

et al. 2017

Bol. Inst. Pesca

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The efficiency of double thermal shock to induce tetraploidy in Rhamdia quelen (jundiá) at different post-fertilization periods was assessed. Each test was performed with 20 mL of eggs (10, 15, 20, 25, 30 and 35 mpf -minutes post-fertilization) exposed to hot thermal shock (39±0.2ºC) for 3 min, followed by cold thermal shock (1.0±0.1ºC) for 30 min. A control group was also employed. Fertilization and hatching rates were evaluated 12 and 30 hours post-fertilization (hpf), respectively. After 60 hpf, twenty-five larvae from each experimental unit were fixed to verify the ploidy by flow cytometry. Control fertilization rate was 87.83% and reached 23. 4%, 28.5%, 30.4%, 20.0%, 30.3%, 36.7% respectively for 10, 15, 20, 25, 30, 35 mpf. Tetraploids were detected only at 15 mpf and 20 mpf. This is the first research of tetraploidy in jundiá obtained by hot and cold shocks, making possible the improvement of this technique.Key words: jundiá; tetraploidy; thermal shock; poliploidy.. RESUMOAvaliou-se a eficiência do choque térmico duplo para induzir tetraploidia em jundiá Rhamdia quelen em diferentes tempos pós-fertilização. Vinte mililitros de ovos (10, 15, 20, 25, 30 e 35 mpf -minutos pós-fertilização) foram tratados com choque térmico quente (39±0,2ºC) durante 3 min seguido de choque térmico frio (1,0±0,1ºC) durante 30 min. Um grupo controle foi utilizado. As taxas de fertilização e de eclosão foram medidas 12 hpf (horas pós-fertilização) e 30 hpf, respectivamente. Decorridas 60 hpf, 25 larvas de cada unidade experimental foram fixadas para verificação da ploidia, por citometria de fluxo. A taxas de fertilização foram de 87,83% para o controle e de 23,4%; 28,5%; 30,4%; 20,0%; 30,3% e 36,7%, para os grupos tratados com choque térmico aos 10, 15, 20, 25, 30, 35 mpf, respectivamente. Encontraram-se tetraploides apenas nos grupos de ovos tratados aos 15 mpf e 20 mpf. Este é o primeiro trabalho de indução de tetraploidia em jundiá por choques térmicos quente e frio, o qual possibilitou o aperfeiçoamento dessa técnica.Palavras-chave: jundiá; tetraploide; choque de temperatura; poliploidia.

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“…Malison et al (1993), however, have suggested the wide range of ambient water temperature from which brood fish were captured as the probable cause for such variation in their experimental fish, perch (Perca flavescens). In the case of C. gariepinus such factors in addition to egg quality could have been important.…”

Section: Resultsmentioning

confidence: 99%

“…: +2348035656840. duced in fish by inhibiting the second meiotic division followed by the extrusion of the second polar body by shocking eggs shortly after fertilization (Chourrout, 1988;Malison et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

The use of cold shock in inducing triploidy in African mud catfish (Clarias gariepinus)

A¹,

H²,

A³

2010

Afr. J. Biotechnol.

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A study was conducted to induce triploidy in African mud catfish Clarias gariepinus using cold shock. The fertilized eggs were exposed at one temperature regime of 0°C with varied shock treatments of 0, 15, 25 and 30 min. Some 3 min after fertilization, the success of triploidy was determined by the presence or absence of bent trunk in the fry as reported by (Aluko et al., 1997). The shock duration of 25 min at 0°C gave the best result of 55% hatch with survival at the end of the exposure regime of 43.5%. Shock exposure of 30 min gave 30% hatch while 15 and 20 min exposure were poor at 15% hatch.

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The influence of triploidy and heat and hydrostatic pressure shocks on the growth and reproductive development of juvenile yellow perch (Perca jlavescens)

Cited by 52 publications

References 32 publications

Intensive culture of juvenile and adult Eurasian perch (P. fluviatilis): effect of major biotic and abiotic factors on growth

Intensive culture of juvenile and adult Eurasian perch (P. fluviatilis): effect of major biotic and abiotic factors on growth

Tetraploidia em Rhamdia quelen (Quoy e Gaimard, 1824) por choque térmico duplo (quente e frio)

The use of cold shock in inducing triploidy in African mud catfish (Clarias gariepinus)

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