NEW RESULTS ON THE FISH AND SHRIMP FAUNA OF THE WEDDELL SEA AND LAZAREV SEA (ANTARCTIC) (15th Symposium on Polar Biology)

• Main Authors: Julian GUTT, Werner EKAU, Matthias GORNY
• Format: Report
• Language: English
• Published: Proceeding 1994
• Subjects: Antarctic; Weddell Sea; Weddell; Lazarev; Lazarev Sea; Vestkapp; Vahsel; Vahsel Bay; Antarc*; antarcticus; Polar Biology; Proceedings of the NIPR Symposium on Polar Biology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5220; http://id.nii.ac.jp/1291/00005220/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5220&item_no=1&attribute_id=18&file_no=1

A total of 151 demersal fishes and 555 shrimps were recorded on 1785 photographs which represent 1607 m^2 sea floor of the shelf and upper slope of the Weddell Sea (Halley Bay near-shore area) and of the Lazarev Sea. The Lazarev Sea showed a high number of species (24) and an average abundance of 7.24 n/100 m^2. In the Halley Bay near-shore area only 11 species were found, however the abundance was high with 15.66 n/100 m^2. The species composition of these areas was compared using cluster analysis with previous results from adjacent areas. The Lazarev Sea was combined with the Halley Bay near-shore and the Kapp Norvegia areas to an area-cluster "north" which was different from an area-cluster "south" which comprised the Gould/Vahsel Bay, Vestkapp and Halley Bay off-shore areas. The most abundant species were Trematomus lepidorhinus in the Lazarev Sea and T. scotti in the Halley Bay near-shore area. The shrimp fauna was dominated in the Halley Bay near-shore area by Chorismus antarcticus with an abundance of 33.45 n/100 m^2 whereas in the Lazarev Sea the three generally most abundant Antarctic shrimps C. antarcticus, Notocrangon antarcticus and Nematocarcinus lanceopes showed values between 1.25 and 3.42 n/100 m^2. Between the two shelf-inhabiting species C. antarcticus and N. antarcticus no difference in depth zonation was found. A small scale analysis of the occurrence of N. antarcticus and N. lanceopes indicated random dispersion patterns at most investigated stations.