Articles

Title:	Gammarus tigrinus Sexton 1939 (Crustacea, Amphipoda) - a new immigrant in the Puck Bay, Southern Baltic Sea
Authors:	Szaniawska Anna Normant Monika Łapucki Tomasz
Abstract:	This study deals with the occurrence and migration of Gammarus tigrinus Sexton 1939 into the Puck Bay (western part of the Gulf of Gdansk, Baltic Sea). The material was collected in September 2002 at nine stations (approximate depth – 0.4 m). The only Gammarus species found at five sampling stations was G. tigrinus. The species found at other stations located along the inner part of the Puck Bay were G. salinus, G. zaddachi, and G. duebeni. The sex ratio for G. tigrinus was close to 1. Almost 50% of the females were carrying eggs. The males were larger (6.0 ± 0.8 mm) than females (4.7 ± 0.8 mm). The average male dry weight was 2.5 ± 1.2 mg and that of females was 2.1 ± 0.7 mg. The relation between length (L) and dry weight (DW) was DW = 0.095·L1.76 (R2 = 0.76). This study indicates that G. tigrinus is spreading rapidly in the Baltic Sea.
DOI:
Type of paper:	Original research paper
Pages:	71 to 78
Cytation:	Szaniawska A., Normant M., 2005, Gammarus tigrinus Sexton 1939 (Crustacea, Amphipoda) - a new immigrant in the Puck Bay, Southern Baltic Sea, Ocean. Hydrob. Studies, 34(2): 71-78
Keywords:	Gammarus tigrinus, non-native species, Baltic Sea, Poland
Year:	2005
Category:
Download:	Download file "110.pdf"