On the relative abundance and distribution of sperm whales (Physeter macrocephalus) and killer whales (Orcinus orca) in the Falkland Islands longline fishery

The relative abundance and distribution of sperm whales (Physeter macrocephalus) killer (Orcinus orca) in the Falkland Islands Conservation Zone was investigated by analyses scientific observer records from longline fishing vessels between 2002 2004. Thematic maps were created observed spatial temporal effort whale sightings. These suggested that restricted to northeast zone, whereas present throughout east along 1,000m depth-contour. A likelihood ratio test showed be relatively more abundant north south zone than middle region (p<0.01). Group size is discussed monthly analysis sightings considered. 32.4% stations had but no significant difference found catches with (p=0.8743, t=0.1598, df=25).