Preliminary studies on haematological and plasmatic parameters in gilthead sea bream (Sparus aurata) held under day/night temperature variations

Fish Physiology and Biochemistry
Ana C MatiasPedro Pousão-Ferreira

Abstract

This study aimed to evaluate to what extent diel water temperature oscillations over a short period of time (41 h) affected haematologic and plasmatic parameters of gilthead sea bream. Sea bream juveniles (160 fish; 177.2 ± 20.9 g) were divided in two homogenous groups, experimental and control. The experimental group was exposed to water at 22.3 ± 0.6 °C between 5 a.m. and 5 p.m. and to colder water from 5 p.m. to 5 a.m. (temperature variation of 8.6 ± 0.3 °C) during 41h period, whereas for the control group, water temperature was maintained constant (22.4 ± 0.7 °C) for the same period. Fish were fed three times per day (10:30 a.m., 2 p.m., 4 p.m.). Blood was collected from fish caudal veins (n = 6) at different time points (10 a.m., 1 p.m., 5 p.m., 6:30 p.m., 8 p.m. and 10 a.m. of the following day) from each group, for haematologic (haematocrit and haemoglobin) and plasmatic (glucose, cortisol, triglycerides and total protein) determinations. All parameters studied tended to vary throughout the study period, both for experimental and control groups. Significant differences were observed between the two groups for all the studied parameters at different sampling points. These differences were observed near the influence of th...Continue Reading

References

Feb 5, 2002·Veterinary Immunology and Immunopathology·Jesús OrtuñoJosé Meseguer
Aug 18, 2005·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·Susana Sangiao-AlvarellosJosé L Soengas
Nov 28, 2006·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Sergio PolakofJosé L Soengas
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blood
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