February 2010

Chum salmon spawners do not respond to flickering near-UV radiation that could be used to drive away egg predators in spawning streams

  Chum salmon (Oncorhynchus keta) eggs are eaten in large numbers by Japanese dace (Tribolodon hakonensis) in the spawning streams in Hokkaido. One way to reduce predation on salmon eggs might be to use flickering near-ultraviolet (UV) radiation at 386 nm, to which Japanese dace is known to react negatively. The effect of flickering near-UV on chum salmon was determined in this paper. Sexually mature chum...

Author(s):   Gunzo Kawamura, Norihiko Nakano, Kazuhiko Anraku and Takaaki Nishi        

February 2010

Automated techniques for quantification of beach change rates using Landsat series along the North-eastern Nile Delta, Egypt

  Ten scenes of Landsat sensors (MSS, TM and ETM+) at unequal intervals spanning 35-year period between 1972 and 2007, were analyzed to quantify erosion and accretion pattern along the North-eastern coastline of Nile Delta, from Gamasa to Port Said. Rates of shoreline changes were calculated from automated waterline positions generated at 852 locations using a Digital Shoreline Analysis System (DSAS) version...

Author(s):   Khalid M. Dewidar and Omran E. Frihy