Published in Scientific Papers. Series D. Animal Science, Vol. LXVIII, Issue 1
Written by Angelica DOBRE, Desimira Maria STROE, Maricel Floricel DIMA, Ion GABRIEL, Patrick LAMBERT, Neculai PATRICHE
The Pontic shad (Alosa immaculata), a migratory fish species of significant ecological and economic importance, is a key component of the ichthyofauna in the Danube River and Black Sea. This study investigates the sex structure and fecundity of Alosa immaculata during its breeding migration, focusing on specimens from the Romanian sector of the Danube River. Sampling was conducted from March to May every year from 2020 to 2024, coinciding with the peak reproductive season. Biological parameters like total length, body weight, and gonad weight will be recorded, while age determination will rely on scale analysis. Absolute individual fecundity (F) will be determined using the weighing method. Relative fecundity (RF) will be calculated by: RF = F*GW/ws, where GW = the gonadal weight of fish and ws = the weight of the sample. The study seeks to fill critical gaps in understanding the reproductive biology of A. immaculata, essential for developing conservation strategies and sustainable fisheries management. The findings will provide insights into population dynamics, aiding in the preservation of this species amid increasing anthropogenic pressures and environmental changes.
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