Influence of blood sample collection on the haematocrit value of two teleosts: rainbow trout (Oncorhynchus mykiss) and European sea bass (Dicentrarchus labrax L.).
1. The effects of the volume of blood extracted, number of extractions, and weight upon the haematocrit value of a freshwater teleost (Oncorhynchus mykiss) and a marine one (Dicentrarchus labrax) have been studied. 2. For trout with the same weight, the increase in the volume of blood extracted results in a significant increase in the haematocrit value. 3. For the same volume of blood extracted--in trout of the same weight--the second extraction results in a significant increase in the haematocrit value. 4. In sea bass, haematocrit variations in relation to the aforementioned parameters are not produced. 5. For both species there is a positive and significant correlation between weight (W) and haematocrit value (Ht), which coincides with the Ht = aWb model, in the range of weights used in this study.
Department of Physiology and Pharmacology, Faculty of Biology, University of Murcia, Spain.
M P
MP
García
G
G
Echevarría
F J
FJ
Martínez
S
S
Zamora
D000818:Animals; D001492:Bass / Q000097:blood*; D001800:Blood Specimen Collection / Q000379:methods*; D006400:Hematocrit; D013045:Species Specificity; D014337:Trout / Q000097:blood*