Red blood cell indices of rainbow trout Oncorhynchus mykiss (Walbaum) in aquaculture
By J. Řehulka, B. Minařík, E. Řehulková. 2004
120 citations recorded by the source corpus.
A direct non-parametric method was used to calculate reference (physiological) haematology values for farmed 10–12-month rainbow trout of the Kamloops strain (mean weight: 330±131 g) with respect to red blood cell counts (RBCc), haematocrit values (Hct), haemoglobin concentrations (Hb), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentrations (MCHC). The fish in the selected reference group (n=798) were given dry pelleted diets that contained 37–47% crude protein, 7–18% crude fat and 108–300-mg vitamin E, 1.08–5-mg folic acid, 0.018–0.05-mg vitamin B12, 48–64.5-mg iron, 4.5–8.4-mg copper and 0.18–0.24-mg selenium supplied per kg of diet. Ethoxyquin and butylhydroxytoluol were used to protect the fat component against oxidation. The fish were kept at a stocking density of 50kg per cubic metre in tanks provided with running freshwater (dissolved oxygen 8.4–11.5 mg L−1, with O2 saturation of 77–98%) at an ambient temperature of 0.2–16°C. Blood was sampled between September and November at a photoperiod of 9–13 h:11–15 h (light:dark). Reference ranges for the preceding haematological indices were as follows in immature females (males): RBCc, 0.77–1.42T L−1 (T – tera, 1012) (0.98–1.55T L−1); Hct, 0.304–0.502 (0.34–0.546); Hb, 54–93 g L−1 (59–97 g L−1); MCV, 282–469 fL (279–434 fL); MCH, 51–86 pg (47–78 pg); MCHC, 0.15–0.22 (0.15–0.2). In males, values for RBCc, Hct and Hb were significantly higher (P=0.01 and 0.0000 respectively) and those for MCV, MCH and MCHC were significantly lower (P=0.01 and 0.0002 respectively) than in immature females. Nutritional and environmental factors affecting erythropoiesis in trout and some correlations between haematological (RBCc, Hb, Hct) and biochemical indices of the blood plasma (total protein, cholesterol) are discussed.
Subfields: Aquatic Science, Immunology, Nature and Landscape Conservation
View Paper: https://www.semanticscholar.org/paper/2622cf0f5891d6e37208b60ee947a1976e9cfb3a
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Citations in the corpus
- Effects of dietary protein levels and rearing density on growth performance and stress response of Nile tilapia, oreochromis niloticus (L.) (2012, background): “However, physiological alterations might be used as indicators for unsuitable environmental conditions or the presence of stress factors such as toxic chemicals, excess organic compounds, and stressors encountered in intensive fish culture (Cnaani et al. 2004; Řehulka et al. 2004).”
- Growth performance and physiological response of African catfish, Clarias gariepinus (B.) fed organic selenium prior to the exposure to environmental copper toxicity (2007, background): “Performing blood chemistry analytic determinations could provide vital information to aid in the diagnosis and management of infected individuals or in fish health assessment (Pincus, 1996; Cnaani et al., 2004; Řehulka et al., 2004).”
- Effect of dietary protein level, initial body weight, and their interaction on the growth, feed utilization, and physiological alterations of Nile tilapia, Oreochromis niloticus (L.) (2010, background): “Diet composition, metabolic adaptations, and variations in fish activity are the main factors responsible for seasonal changes in physiological variables (Cnaani et al., 2004; Řehulka et al., 2004).”
- The influence of the endogenous and exogenous factors on hematological parameters in different fish species: a review (2020, background): “2004), feeding and stocking density (Vazquez and Guerrero 2007), and starvation (Rehulka et al. 2004; Rios et al. 2002; Sopinska 1984; Weinberg et al. 1976).”
- The use of calcium pre-exposure as a protective agent against environmental copper toxicity for juvenile Nile tilapia, Oreochromis niloticus (L.) (2007, background): “The hematological examination of farmed fish is an integral part of evaluating their health status (Řehulka et al., 2004).”
- Evaluation of commercial live bakers' yeast, Saccharomyces cerevisiae as a growth and immunity promoter for Fry Nile tilapia, Oreochromis niloticus (L.) challenged in situ with Aeromonas hydrophila (2008, background): “Biochemical analyses often provide vital information for health assessment and management of cultured fish (Pincus, 1996; Cnaani et al., 2004; Řehulka et al., 2004).”
- Compensatory Growth, Feed Utilization, Whole-Body Composition, and Hematological Changes in Starved Juvenile Nile Tilapia, Oreochromis niloticus (L.) (2006, background): “The diet composition, metabolic adaptations and variations in fish activity are the main factors responsible for the seasonal changes in hematological parameters of fish (Rehulka et al. 2004).”