Comparative Hematology of Wild and Captive Cunners

Abstract

Hematological variables including erythrocyte numbers, hematocrit, osmotic fragility, differential leucocyte count, and cellular morphology were studied in wild (freshly caught) cunners Tautogolabrus adspersus, and compared with those of cunners held in captivity for 4 days. Statistically significant differences were found between wild and captive fish and between the sexes of wild fish. In captive fish, values for erythrocyte (RBC) numbers, hematocrit, mean erythrocyte volume, osmotic fragility, lymphocytes, eosinophils, and the incidence of degenerating RBCs were depressed, whereas values for immature RBCs, fine granulocytes, and immature fine granulocytes were increased compared with wild fish. Captive male cunners showed more pronounced changes in the incidence of immature fine granulocytes (increased) and hematocrit (depressed) than did females. The hematocrit appears to be a good variable for assessment of erythrocyte hematological status in cunner, based upon significant differences between groups of fish and on significant correlations between hematocrit and erythrocyte numbers. Survival of test fish was 95%. These results and methods should be useful in future studies of cunner, especially if recent interest in its use for pollution monitoring continues.

Effect of Cynodon dactylon on the haematological parameters and haematocrit of grass carp Ctenopharyngodon idella (Val.)

“…The protein showed higher value when compared to other parameters. The maximum value of protein in both control and experimental fishes are agreement with earlier observation 1,10,12,20 . According to 16 increase in serum protein, albumin, and globulin in fishes in supposed to be associated with stronger innate immune response.…”

“…Adding of medicinal plants as one of the ingredient in fish feed improve the immunity of fish and inhibit the microbial pathogens. The study of haematology in fishes used for early diagnosis of disease 1,10,11,12 .…”

Hematologic and serum biochemical reference intervals for wild eastern quolls (Dasyurus viverrinus): Variation by age, sex, and season

“…For endangered species, low numbers of wild individuals often mean that RIs are derived from captive individuals. However, hematologic and biochemical profiles of captive animals do not necessarily correspond to those of wild individuals as diet, energy requirements, behavior, pathogen, and parasite exposure will likely differ between captive and wild populations. Furthermore, when establishing RIs, juvenile or lactating individuals are typically excluded from the reference sample group, making the health assessment of individuals in these demographic categories difficult.…”

Haematological reference intervals of wild southern Australian koalas (Phascolarctos cinereus)

“…Two subsequent studies developed haematological reference intervals (RIs) for northern koalas, which are still used by commercial veterinary laboratories Australia wide . Dickens developed RIs in 1976 using more than 200 wild and captive koalas from Queensland, New South Wales and Victoria by manual methods; however, the health status of these koalas was not reported, and haematological variables have been shown to differ between captive and wild animals in some species, such as fish and river turtles . The most widely used RIs, of Canfield et al, were developed in 1989 from 45 wild koalas in apparent good health from New South Wales.…”