The aim of the experiment was to determine impact sorting on growth, survival, and cannibalism pikeperch larvae during intensive culture in recirculation systems. Larvae aged 48 days post-hatch (DPH) were reared three groups - small specimens (group S average body weight 40 mg), large L 76 unsorted ones U 55 mg). After weeks rearing, there no statistically significant differences specific growth rates among groups. However, increases biomass higher sorted Survival exceeded 50% 39% group U....

Sturgeon species are living fossils that exhibit unique reproductive characteristics, and elucidation of the molecular processes governing formation quality sturgeon eggs is crucial. However, comprehensive data on protein composition ovarian fluid (OF) their functional significance lacking. To address this knowledge gap, aim present study was to conduct a comparative proteomic analysis Siberian OF using liquid chromatography-mass spectrometry (LC-MS/MS).

The impact of stocking density on the growth, feed conversion, oxygen consumption, and ammonia excretion juvenile Atlantic sturgeon (Acipenser oxyrinchus Mitchill) was studied. Three initial densities were used in experiment: 1.27, 2.49, 3.80 kg m -2 . length experiment 64 days. mean water temperature 15.0C. fish fed commercial Nutra T 1.9 (Trouv, France). body weight growth highest group stocked at lowest density. from this attained a final 130.1 g, which statistically significantly higher...

The Atlantic sturgeon (Acipenser oxyrinchus) faces unique conservation challenges due to its extended maturation period and irregular spawning patterns, which restrict reproductive capacity. Therefore, in order overcome these difficulties we have made a first attempt develop effective cryopreservation procedure for through evaluation of the effects glucose concentration extender final sperm straw on motility parameters. A remarkably high (81 ± 8%) postthaw was obtained. other velocity...

Cryopreservation is crucial for conserving genetic diversity in endangered species including the critically group of sturgeons (Acipenseridae), but it can compromise sperm quality and protein profiles. Although cryopreservation with dimethyl sulfoxide (DMSO) methanol (MeOH) results recovery good post-thaw motility, DMSO-preserved show reduced fertilization ability. This study was conducted Siberian sturgeon as a model Acipenserid fishes to explore effects DMSO MeOH on proteome semen using...

The aim of the study was to determine impact different light intensities on results rearing juvenile pikeperch, Sander lucioperca (L.), in recirculating aquaculture systems (RAS). In experiment I, applied were 45.1 lx (group LI) and 385.7 HI) (initial body weight - 6.1 g), while II they 1.2 LII) 8.0 HII) 42.2 g). both experiments, fish reared tanks with lower intensity (groups LI exhibited faster growth rates (P 0.05). obtained indicate that application low ( 6 g) is justified since it has a...

Abstract The experiment examined the possibility of rearing juvenile pikeperch, Sander lucioperca (L.) in polyculture with sterlet Acipenser ruthenus L. a recirculating system. Three variants pikeperch were tested: monoculture (group S), addition at 10% S10) and 20% S20) initial biomass. After 56 days rearing, no differences growth rates or survival noted. value feed conversion ratio group was 1.19 significantly statistically higher than groups, values which 0.84 (S10) 0.74 (S20). mean...

In this study, the quality of northern pike eggs collected by traditional method (hand stripping) and pneumatic (air was compared. Additionally, different activation solutions (Billard solution, hatchery water, Woynarovich solution) were tested for their effects on egg fertilization under artificial conditions. After collected, Pseudo-Gonado-Somatic Index (PGSI) measured. Although values PGSI in samples obtained with use air stripping lower (13.8 ± 3.9%), they did not differ statistically...

This is the first report of reproduction a gynogenetic female Siberian sturgeon (Acipenser baerii) and subsequent production viable offspring with differentiated gonads. Gonads were sampled twice from 30 randomly selected individuals. Gonadal fragments examined histologically to identify sex ratio sexual maturation stage. The group consisted 20 % females, 45 males 35 sexually undifferentiated individuals, whereas second was composed females 70 males. average gonadosomatic index determined be...

This study compared the quality of northern pike eggs collected using traditional methods (hand stripping) and pneumatic (air stripping). The effects different activation solutions (0.4% NaCl, 0.8% hatchery water) on egg fertilization under controlled conditions were also investigated. After collection, Pseudo-Gonado-Somatic Index (PGSI) was measured; PGSI values in samples obtained method (13.8 ± 3.9%) lower, but did not differ statistically from those by hand stripping (16.5 5.4%). 0.4%...

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The aim of this experiment was to assess the impact live and formulated diets had on growth survival larval Atlantic sturgeon, Acipenser oxyrinchus Mitchill. In first experiment, results feeding fish decapsulated (group D) undecapsulated ND) Artemia sp. cysts were compared. Increases in body weights lengths fed similar at values that not statistically significant. Survival group higher comparison (95.0 82.8%, respectively). second three commercial starter feeds used: Aller ArtEX (Aller Aqua,...

This study identifies the possibility of using visible implant elastomers (VIE) to tag juvenile Atlantic sturgeon (Acipenser oxyrinchus). The mean body weight was 2.4 ± 0.4 g, and length 5.5 0.5 cm. Markers in three colours were used: blue, orange green. Implant injected rostrum tail shaft. experiment conducted over a period 10 weeks included also control group, that is, no tagging. No significant effect tagging on specific growth rate, feed conversion ratio condition factor observed. fish...

In the study effects of artificial reproduction sterlet (Acipenser ruthenus) fed different feed ration were compared. Three doses used: 1.0%, 0.75% and 0.5% fish biomass per day. The results indicate that rations for used caviar production or breeding material should differ. optimal quality sex products progeny was biomass, whereas in view number maturing fish, better 1% biomass. group day highest GSI value, largest eggs hatch survival to noted. too low, as indicated by low parameters...

The aim of the study was to determine what impact feeding juvenile common whitefish, Coregonus lavaretus (L.), different feed rations had on rearing indexes and oxygen consumption during culture in recirculation systems. Three treatments were applied: 2% (group L), 3% M), 4% H) fish biomass. final whitefish weight increased with increasing daily rations. Fish from group H (largest ration) statistically significantly (P < 0.05) higher body weights (50.3 g) conversion ratios (1.14) than did...

The aim of the study was to determine impact different feed rations on growth rate, conversion, and variation in body weights juvenile pike, Esox lucius (L.), cultured a recirculating system. Three were used experiment: 0.5% (group L), 0.8% O), 1.1% H) fish biomass. each group fitted with Carlin tags classified according size as individuals that small (class S) mean weight 63.0 g, medium M) at 90.7 large L) 137.2 g. After eight weeks culture, from O had highest weight. final this 7% higher...

We’ve built this digital research platform to provide academics everywhere with fast, stable and secure access our library of over 110,000 scholarly books 800,000 journal articles. tested the in close cooperation leading academic institutions. If you have any questions or notice something doesn’t quite work as it should, please visit <a href="/publishing/faq?lang=en" class="text-primary">Help/FAQ</a> page let us know.

We’ve built this digital research platform to provide academics everywhere with fast, stable and secure access our library of over 110,000 scholarly books 800,000 journal articles. tested the in close cooperation leading academic institutions. If you have any questions or notice something doesn’t quite work as it should, please visit <a href="/publishing/faq?lang=en" class="text-primary">Help/FAQ</a> page let us know.

Abstract Three 28-day experiments were performed to assess the impact of two sinking feed pellet sizes (0.5–1.0 and 0.9–1.6 mm for experiment I, 1.3–2.0 II, 1.6–2.4 III) tank water levels (0.50 0.65 m) on growth performance juvenile pikeperch different mean initial body weights in III respectively (1.1 ± 0.1 g, 5.1 0.2 16.6 0.5 g) at ages (67, 102, 137 days post hatch). Two-factor analysis variance showed that was positively correlated with size both level III. The 1.1 g respectively, are...

The ecological consequences of hatchery rearing have been widely studied, whereas there are relatively few investigations the impact diets and culture conditions on morphological variation, especially in rare or endangered species. aim current study was to determine diet morphometric features crucian carp (Carassius carassius), which is a species characterised by highly variable body shape. In first experiment, feed type carp's shape tested, while second, determined. Feed significantly...