MATING BEHAVIOUR OF THE CHINESE MITTEN CRAB (ERIOCHEIR SINENSIS, H. MILNE EDWARDS, 1853) IN THE ODRA ESTUARY: PRELIMINARY RESULTS

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Przemysław Czerniejewski Józef Domagała Wawrzyniec Wawrzyniak Robert Czerniawski

Abstract

Chinese mitten crab is one of the largest invasive crustaceans in the waters of Europe and its presence poses a significant threat to biological diversity because of its number, omnivorousness and high fertility. An important limitation to proliferation of this catadromous species is the degree of water salinity. This paper reports on the possibility of mating of Chinese mitten crab migrating in autumn-winter through the Odra River estuary (Lake Dąbie) and coastal region of Pomeranian Bay, whose salinity is 0.2-1 PSU (fresh water) and 4-8 PSU (brackish water), respectively. The crabs caught in the period July-December 2010 were introduced in pairs into the tanks with oxygenated water of salinity the same as in the two respective water basins and observed. The experiment lasted from September 2010 to January 2011, mating pairs were observed from October to January with the greatest number of mating pairs in December (10.81% of the total number of pairs). From among 124 pairs in 41 pairs absolutely no contact was noted. In the remaining 83 pairs (66.93% of all individuals), some physical contact was observed including a fight in 31 pairs and other types of behaviour in 52 pairs. Among 83 pairs after physical contact, mating was observed only in 9 pairs kept in water of 8 PSU salinity (brackish water). The factor determining the mating behaviour of the crab was the water salinity. In the Odra River estuary the mating of the crab is possible only in the Pomeranian Bay and periodically in the northern part of the Szczecin Lagoon after autumn backwater events.


Key words: Chinese mitten crab, mating, behaviour, Odra estuary

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How to Cite
CZERNIEJEWSKI, Przemysław et al. MATING BEHAVIOUR OF THE CHINESE MITTEN CRAB (ERIOCHEIR SINENSIS, H. MILNE EDWARDS, 1853) IN THE ODRA ESTUARY: PRELIMINARY RESULTS. Baltic Coastal Zone, [S.l.], v. 16, p. 2012, vol.16, pp. 89 - 96, sep. 2012. ISSN 1643-0115. Available at: <https://bcz.apsl.edu.pl/index.php/1/article/view/95>. Date accessed: 06 july 2022.
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