Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 2
Written by Iulia GRECU, Angelica DOCAN, Alina MOGODAN, Lorena DEDIU, Victor CRISTEA, Tudor IONESCU, Ionut MIHALACHE
This study characterizes the haematological and parasitological profiles of the Pontic shad during its passage in the freshwater environment (Danube, Mm 74-77) as part of the reproduction migration. The investigations were carried out by classic methods on specimens captured during the 2011 and 2018 migrations. The obtained values for the haematological parameters, in the both samples sets, varied in the following ranges: red blood cells count (RBCc) 1.40÷3.82 (×106cells/μL), haemoglobin (Hb) 9,29÷16.87 (g/dL), haematocrit (Ht) 32,75÷88.00 (%), mean corpuscular volume (MCV) 146,37÷298.47 (fL), mean corpuscular haemoglobin (MCH) 38.32÷80,33 (pg), mean corpuscular haemoglobin concentration (MCHC) 15.14÷34,95 (g/dL). From parasitological point of view, in the analysed Alosa immaculata, the most frequently encountered parasitosis was produced by Contracaecum aduncum, in direct correlation with the shad’s diet. The prevalence of the infestation with this nematode was quite high in both data samplings. Extending the future research regarding the specie’s health condition at different times of migration, from Black Sea till Danube upstream, can complete the profile of the physiological reactions of this species with great ecological importance.
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