Haematological and haematopoietic effects of feeding different diets and starvation in common carp Cyprinus carpio L

Abstract

Effects of starvation and malnutrition on peripheral blood parameters, composition and activity of haematopoietic tissue and oxygen consumption rate were evaluated in common carp. Fish were fed Aller Aqua Classic (control diet), ground barley (diet of low nutritional value) or starved for 15 weeks. Blood was analysed after 3, 7 and 15 weeks. At the end of the experiment, oxygen consumption rate of fish was measured and head kidneys were isolated. Values of most peripheral blood parameters did not significantly differ among experimental groups but erythroblast frequency was reduced in starved fish. Haematopoietic tissue of control fish contained significantly lower percentage of early blast cells and erythroid cells compared to the other groups. Neutrophilic lineage was the least frequent in starved fish, and the most abundant in the control. Frequency of lymphoid, monocytoid and thrombocytoid cells did not significantly differ among experimental groups. The control fish showed significantly higher haematopoietic activity (ratio of proliferating to apoptotic cells) compared to the other groups. Control fish showed the highest oxygen consumption rate and starved fishthe lowest. Starvation or low-quality feeding did not cause anaemia or significant immunodeficiency in carp but reduced haematopoietic activity, which was directly related to the metabolic rate.

Growth performance and hematological parameters of banded cichlid Heros severus fed at different feeding rates and feeding frequencies

“…The lowest used feeding rate did not cause lower growth, but is not sufficient to keep the homeostasis, promoting reduction in erythrocyte, hemoglobin and MCV. Thus, lower amount of the food caused lower nutrient amount available to the fish, promoting anemic process with possible deficit to the oxygen transport for tissues (Kondera et al, 2017).…”

Partial immune responses in Sichuan bream (Sinibrama taeniatus) after starvation

“…In brief, after anesthetized with MS-222 (500 mg/L, Sigma Chemicals Inc., USA), the body mass and body length of each fish in each group were measured. Biometric indexes including weight gain percentage (WG, %), condition factor (CF, g/cm 3 ), visceral somatic index (VSI, %) and hepatic somatic index (HSI, %). The above mentioned measurements were calculated as follows: WG% = (final body weight − initial body weight)/initial body weight×100, CF = Weight of fish (g)/(fish total length) 3 (cm) 3 × 100, VSI = (total weigh of all viscera/total body weight) ×100 and HSI = (liver weight/total body weight) ×100 (16).…”

Efecto de la densidad de siembra sobre el crecimiento y parámetros sanguíneos de Dormitator latifrons (Richardson, 1844)

“…En lo que respecta al efecto de las diferentes densidades de siembra probadas sobre los parámetros sanguíneos, no se encontraron diferencias significativas en los parámetros analizados (NBT, Hct, proteínas totales, albúminas, globulinas y relación A/G). El nivel de Hct encontrado en todos los tratamientos corresponde a los hábitos de D. latifrons, de acuerdo a los descrito por Larsson et al (1976), y Kiron (2012), quienes Por otra parte, el bajo valor del NBT, pudiera explicarse también porque la ración de alimentación propuesta por Agualsaca-Ormaza (2015), es baja, tal como sugiere Kondera et al (2017), quienes repor-tan una disminución considerable del NBT en carpas Cyprinus carpio, cuando sufren periodos prolongados de inanición; la deficiencia en la alimentación también pudiera explicar el lento crecimiento de los peces. No hubo muertes significativas de los peces en ningún tratamiento, ni disminución del Hct en la sangre, sugiriendo que el bajo NBT no se debe a una respuesta inmune a las condiciones de laboratorio (Yarahmadi et al 2014, Hoseinifar et al 2015.…”