Velí‰ek J., T. Wlasow, P. Gomulka, Z. Svobodová, L. Novotn˘, E. Ziomek: Effects of Clove Oil Anaesthesia on European Catfish (Silurus glanis L.). Acta Vet. Brno 2006, 75: 99-106.The aim of the study was to investigate acute toxicity of clove oil for European catfish and, using values of haematological and biochemical profiles of blood and histological tissue examinations, to assess the effects of the fish exposure to that anaesthetic. Acute toxicity values of clove oil for European catfish found were 10minLC50 76.70 mg·l -1 ; 10minLC0.1 49.60 mg·l -1 ; 10minLC99.9 118.50 mg·l -1 ; 96hLC50 18.40 mg·l -1 ; 96hLC0.1 10.70 mg·l -1 ; and 96hLC99.9 31.90 mg·l -1 . Individual phases of anaesthesia and recovery were determined. The 10-min exposure to clove oil at a concentration of 30 mg·l -1 caused a significant (p < 0.05) increase in the concentration of triacylglycerols (TRIG), alanin aminotransferase (ALT) and decreased (p < 0.05) in mean corpuscular haemoglobin concentration (MCHC) immediately after anaesthesia. The leukocyte counts were significantly (p < 0.05) decreased 24 hours after anaesthesia. A significant (p < 0.05) decrease of percentage distribution lymphocytes was found immediately after anaesthesia. On the other hand, percentage and absolute count of myeloid cells were increased. Increased percentage count of eosinophils outlasted 24 hours after anaesthesia, absolute counts of these cells were consistents with control. Histological examination showed capillary ectasia of gill filaments immediately after clove oil anaesthesia. Twenty-four hours after anaesthesia, no ectasia was observed. No histopathological changes were demonstrated in other tissues following anaesthesia. Results of the examinations suggest that the use of clove oil at a concentration of 30 mg·l -1 does not cause irreversible damage in European catfish.Acute toxicity, haematological profile, biochemical profile of blood, histological examination of tissues
Fisheries Institute in Olsztyn, PolandCitation: Zakêoe Z., Demska-Zakêoe K., Szczepkowski M., Ro¿yñski M., Ziomek E. 2016 -Impact of sex and diet on hematological and blood plasma biochemical profiles and liver histology of pikeperch (Sander lucioperca (L.)) -Arch. Pol. Fish. 24: 61-68.Abstract. The aim of the study was to determine the impact of diet and sex on the hematological and blood plasma biochemical profiles and the liver histology of pikeperch, Sander lucioperca (L.) reared in recirculating aquaculture systems (RAS) (initial mean body weight (BW) 1.35 kg). The proximate composition of the two commercial feeds used were (protein/lipid/nitrogen-free extracts) (P/L/NFE)) P505/L118/NFE294 g kg -1
The aim of this work was to determine the impact of etomidate (Propiscin) dose (1 and 2 ml l -1 ) and exposure time (2 and 10 min) on the biochemical and haematological parameters of juvenile pikeperch (Sander lucioperca) [mean body length (Lc) 25.9 cm; body weight (W) 189.9 g] that were reared in a recirculating aquaculture system (RAS). Significant changes in the mean values of total protein, globulin, calcium, magnesium, and ammonia were noted in all groups immediately following exposure. The greatest changes in the haematological indicators were observed in groups subjected to 10-min exposure at both doses of the anaesthetic. The specimens from these groups had higher values for white blood cells (WBC), red blood cells (RBC), haemoglobin (HGB), haematocrit (HCT), and mean corpuscular volume (MCV). Statistically significant differences in these same parameters were also noted in the groups of fish exposed to the anaesthetic for 2 min at a dose of 2 ml l -1 , but they were not as pronounced. Twenty-four h following exposure to etomidate, all blood parameters in the experimental groups were comparable to those of the control group. Etomidate can be recommended as a safe, effective anaesthetic for pikeperch.
Weaning of fish is a critical stage during larval rearing and could cause high mortality. Therefore, proper larval weaning period selection is crucial for the success of larviculture. This study aimed to find the effect of weaning on growth performance, histopathological features, and mortality rates in larvae of Sterlet Acipenser ruthenus. The experimental rearing was conducted from 7 to 38 d posthatch (dph) at a mean temperature of 18°C in a recirculating system. The experiment was carried out in three groups (each with three replicates) and placed in nine tanks (22 L) at a density of 10 individuals/L. The diet groups were made up of group C in which larvae were fed with nauplii of brine shrimp Artemia spp., group F7 in which larvae were weaned to dry feed 15 dph, and group F that was fed with dry feed throughout the experimental trial. During 15-38 dph, total wet body weight and total length were lowest in the group fed with formulated feed. Survival rate of larvae in group F7 was 90.45% and 70.05% during 7-14 and 15-22 dph, respectively. On the other hand, the survival rate of larvae fed only Artemia nauplii (group C) or formulated feed (group F) was 86.14% and 70.45% during 7-14 dph and 84.55% and 78.41% during 15-22 dph, respectively. The maximum height of the enterocytic epithelium was found in the individuals in group F7 (mean ± SD = 33.80 ±
Propofol, 2,6-diisopropylphenol, seems to be a good candidate as a fish anaesthetic, however, no study regarding propofol influence on fish has yet been reported. The aim of this study was to examine propofol pharmacokinetics in rainbow trout (Oncorhynchus mykiss) following bath exposure. Fish (n = 100) were exposed to an aqueous propofol bath at 12 o C and 17 o C; propofol concentration in the bath was 10 mg L -1 . Plasma concentration-time profiles were determined using LC-MS, and pharmacokinetic parameters were calculated. Propofol was absorbed quickly at both temperatures. Its concentration reached 13.8±2.7 μg mL -1 and 16.1±2.1 μg mL -1 at 12 o C and 17 o C, respectively, during the first minute of exposure. Blood plasma propofol decreased rapidly to 6.8±0.7 μg mL -1 and 6.3±2.2 μg mL -1 at 12 o C and 17 o C respectively, during the first 10 minutes of the recovery. The half-life time of propofol was 1.5 h and 1.1 h at 12 o C and 17 o C, respectively. We found propofol anaesthesia in trout effective and safe. However, it caused a gradual decrease of respiratory rate, and therefore a specific anaesthesia protocol should be developed.
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