Effects of stocking density on haematological parameters, growth and fin erosion of great sturgeon (<i>Huso huso</i>) juveniles

Rafatnezhad, Saeedeh; Falahatkar, Bahram; Gilani, M H Tolouei

doi:10.1111/j.1365-2109.2008.02020.x

Cited by 63 publications

(68 citation statements)

References 32 publications

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“…Increasing the stocking density to 3.80 kg m -2 resulted in lowered daily body growth rates and the final body weights of these fish in comparison to those reared at lower stocking densities. Similar results were obtained by Jodun et al (2002) in an experiment with larger Atlantic sturgeon (368 g) reared at increasing stocking densities from 3.6 to 16.3 kg m -2 , and by Rafatnezhad et al (2008) in an experiment with juvenile beluga sturgeon, Huso huso (L.), in which growth rates decreased as stocking densities increased from 1 to 8 kg m -2…”

Section: Discussionsupporting

confidence: 77%

“…While cannibalism among sturgeon juveniles and older stages is extremely rare, aggressive behavior in which the fish attack each other has been noted. For example, Rafatnezhad et al (2008) reported increased incidences of tail fin wounds among juvenile beluga sturgeon as stocking density increased. This phenomenon was not noted in the current study, and it appears that juvenile Atlantic sturgeon do not exhibit aggressive behavior towards each other.…”

Section: Tablementioning

confidence: 99%

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Impact of higher stocking density of juvenile Atlantic sturgeon, Acipenser oxyrinchus Mitchill, on fish growth, oxygen consumption, and ammonia excretion

Szczepkowski¹,

Szczepkowska²,

Piotrowska³

2011

Archives of Polish Fisheries

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Abstract. The impact of stocking density on the growth, feed conversion, oxygen consumption, and ammonia excretion of juvenile Atlantic sturgeon (Acipenser oxyrinchus Mitchill) was studied. Three initial stocking densities were used in the experiment: 1.27, 2.49, and 3.80 kg m -2 . The length of the experiment was 64 days. The mean water temperature was 15.0°C. The fish were fed commercial feed Nutra T 1.9 (Trouv, France). Atlantic sturgeon body weight growth was the highest in the group stocked at the lowest density. The fish from this group attained a final body weight of 130.1 g, which was statistically significantly higher than that of the groups stocked at densities of 2.49 kg m -2 (P < 0.05) or 3.80 kg m -2 (P > 0.01).Stocking density had a substantial impact on the value of the feed conversion ratio (FCR) in the different groups. The lowest FCR was noted at the density of 1.27 kg m -2 at 0.67. This value differed statistically significantly from group 2.49 kg m -2 , in which it was 0.74 (P < 0.05), and it differed highly statistically significantly from group 3.80 kg m -2 at 0.83 (P < 0.001). The differences in the FCR value between groups 2.49 and 3.80 kg m -2 were also highly statistically significant.

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Section: Discussionsupporting

confidence: 77%

Section: Tablementioning

confidence: 99%

Impact of higher stocking density of juvenile Atlantic sturgeon, Acipenser oxyrinchus Mitchill, on fish growth, oxygen consumption, and ammonia excretion

Szczepkowski¹,

Szczepkowska²,

Piotrowska³

2011

Archives of Polish Fisheries

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“…Similarly, many studies have not found any significant effects of density on survival (Gomes et al 2006;Rafatnezhad et al 2008;Ni et al 2014). Kikuchi et al (2006) reported that injuring of caudal fin was observed at high stocking densities of 8, 20, and 10 kg/m 3 for 8-, 13-, and 100-g-size tiger puffers, respectively.…”

Section: Discussionmentioning

confidence: 99%

The effect of feeding frequency, water temperature, and stocking density on the growth of river puffer Takifugu obscurus reared in a zero-exchange water system

Yoo¹,

Lee

2016

Fish Aquatic Sci

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The effects of daily feeding frequency (Exp I), water temperature (Exp II), and stocking density (Exp III) on the growth of river puffer, Takifugu obscurus, juvenile fish of 10 and 40 g in body weight were examined to develop effective techniques to produce river puffer in a non-exchange water system. In Exp I, fish were fed commercial floating feed with 45 % protein one to five times per day to apparent satiation each by hand daily for 8 weeks at 25°C. In both the 10-and 40-g size groups, the final body weight, daily feed consumption, and weight gain of fish fed one meal per day were significantly lower than those of fish fed five meals per day (P < 0.05). However, there were no significant differences in the final body weight, daily feed consumption, and weight gain among fish fed two, three, and five meals per day. Feed efficiency showed decreasing tendency with increasing size of fish. In Exp II, fish of 10 and 40 g in initial body weight were reared with the commercial feed at 15-30°C for 8 weeks. The weight gain of fish increased with raising water temperature up to 25°C and decreased drastically at 30°C for both sizes. The Q10 of specific growth rate was decreased with raising water temperature from 5.04 (temperature interval, 15-20°C) to 0.66 (25-30°C) for the 10-g fish and from 4.98 to 0.31 for the 40-g fish. In Exp III, the effect of stocking density on growth was examined with fish of 10 and 40 g in initial body weight. The final body weight for initial stocking densities of 4, 8, and 12 kg/m 3 was significantly higher than that of 20 kg/m 3 for the 10-g fish, and the final stocking density reached 10. 1, 19.2, 28.7, and 39.9 kg/m 3 , respectively. For the 40-g fish, the final body weight for initial stocking densities of 3 and 6 kg/m 3 was significantly higher than that of 9 and 15 kg/m 3 and the final stocking density reached 7.38, 13.5, 17.1, and 27.5 kg/m 3 , respectively (P < 0.05). In both groups, weight gain tended to decrease with increasing stocking density; however, survival showed no significant difference.

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“…The sizes of the larvae coupled with their relatively large numbers per volume unit could result in unfavorable social interactions (e.g. stress) influencing the diversification of growth rates between treatments at the end of the experiment (Bolesina et al, 2006;Rafatnezhad et al, 2008).…”

Section: Rheophilic Cyprinids At High Densitiesmentioning

confidence: 99%

Effect of stocking density on growth, survival and development of aspAspius aspius(L.), ideLeuciscus idus(L.) and chubLeuciscus cephalus(L.) larvae during initial rearing under laboratory conditions

Kupren

Żarski

Krejszeff

et al. 2011

Italian Journal of Animal Science

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This study was aimed at determining the effect of stocking density on growth, survival and development of asp Aspius aspius (L.), ide Leuciscus idus (L.) and chub Leuciscus cephalus (L.) larvae, reared under laboratory conditions. Fish larvae were obtained during artificial reproduction. The larvae were fed ad libitum with freshly hatched Artemia sp. nauplii. Eight density variants from 50 to 400 individuals per 1 L (at the interval of 50 individuals L -1 ) were tested. The initial rearing was carried out for 21 days at 25°C in a recirculation system especially designed for that purpose consisting of 16 tanks with a capacity of 1 L each. The fastest growth rate for all three species, expressed as the greatest average total length, weight and most advanced ontogenetic stage at the end of the experiment was obtained at the lowest stocking density. Fish from other treatments, particularly at densities exceeding 150 individuals L -1 , were characterized by similar body sizes and the same ontogenetic stage on the last day of rearing. The recorded differences in the length of larvae among treatments became visible during the first (asp) or third (chub, ide) week of rearing. No effects of stocking density on larval mortality were found during the experiment.

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Effects of stocking density on haematological parameters, growth and fin erosion of great sturgeon (Huso huso) juveniles

Cited by 63 publications

References 32 publications

Impact of higher stocking density of juvenile Atlantic sturgeon, Acipenser oxyrinchus Mitchill, on fish growth, oxygen consumption, and ammonia excretion

Impact of higher stocking density of juvenile Atlantic sturgeon, Acipenser oxyrinchus Mitchill, on fish growth, oxygen consumption, and ammonia excretion

The effect of feeding frequency, water temperature, and stocking density on the growth of river puffer Takifugu obscurus reared in a zero-exchange water system

Effect of stocking density on growth, survival and development of aspAspius aspius(L.), ideLeuciscus idus(L.) and chubLeuciscus cephalus(L.) larvae during initial rearing under laboratory conditions

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