Comparative study of some haematological and biochemical blood parameters in fishes from the Skagerrak

Abstract

Marine fishes caught in the Skagerrak, 27 different species representing various groups of fishes (Cyclostomi, Holocephali, Elasmobranchii and Teleostei), were examined for the following haematological and biochemical blood parameters : haematocrit, haemoglobin, mean corpuscle haemoglobin concentration, total plasma protein, blood glucose and blood lactate. Interspecies variations as well as variations within some species were observed. The haemoglobin values for all species showed a positive correlation to the corresponding haematocrit values. Relatively low values for haematocrit and haemoglobin were found in cyclostomes, holocephaleans and elasmobranchii compared to the majority of teleosts. Within the teleost group, the haematocrit and haemoglobin levels were positively correlated with the activity of the fish species. The cyclostome Myxine glutinosu L. had a total plasma protein content in the same range as most teleosts, whereas holocephaleans, elasmobranchii and the deep-water teleost Coryphuaaoides rupestris Gunnerus showed comparatively low values. Among teleosts some relationship seemed to exist between the total plasma protein level and the activity of the fish species. In addition, a correlation between plasma protein content and levels of blood lipids were noted. Values for blood glucose and blood lactate were found to be lower in cyclostomes, holocephaleans and elasmobranchii than in most teleosts. Higher blood glucose levels were observed in the more active teleost species.

Pathology caused by adult Pseudochondracanthus diceraus (Copepoda:Chondracanthidae), a parasite of bullseye puffer fish Sphoeroides annulatus

“…The difference in the erythrocyte size may be linked to a sedentary life style of the bullseye puffer fish. This is in agreement with Larsson et al (1976) who hypothesised that fish with more active life styles had larger erythrocytes than those with a sedentary life style. However, differences in sizes of blood cells between fish species reinforce the necessity to thoroughly characterise each species separately (Shigdar et al 2007).…”

Hematological and morphometric blood value of four cultured species of economically important tropical foodfish

“…Hemoglobin levels tend to be relatively constant within the same species, but may considerably differ between different species (Cameron, 1969;Larsson et al, 1976). Nevertheless, depending on the physiological conditions of the fish, hematological variations can occur between animals of different species as well as between individuals of equal species (Mahajan & Dheer, 1979).…”

Celulas Sanguineas De Schroederichthys Chilensis (Guichenot 1848) (Elasmobranchii, Scyliorhinidae): La Serie Blanca

“…Hematológicamente, los peces Cartilaginosos se caracterizan por presentar valores de hematocrito, recuentos de eritrocitos y hemoglobina menores a los encontrados en peces óseos (Wilhelm et al 1992) y dentro de los cartilaginosos, los escualimorfos tenderían a presentar valores mayores que los bátidos (Larsson et al 1976). Hasta el momento, los antecedentes hematológicos publicados para S. chilensis se remiten a la descripción de la ultraestructura de granulocitos (Morillas 1981a(Morillas , 1981b.…”