scholarly journals Killer whales ( Orcinus orca ) feeding on lumpfish ( Cyclopterus lumpus ) in northern Norway

2019 ◽  
Vol 36 (1) ◽  
pp. 89-102
Author(s):  
Eve Jourdain ◽  
Richard Karoliussen ◽  
Jacques Vos ◽  
Stanislav E. Zakharov ◽  
Christelle Tougard
Keyword(s):  
Orcinus Orca ◽  
Killer Whales ◽  
Northern Norway ◽  
Cyclopterus Lumpus

Migratory and diurnal activity of North Atlantic killer whales (Orcinus orca) off northern Norway

2020 ◽  
Vol 533 ◽  
pp. 151456
Author(s):  
Rune Dietz ◽  
Audun H. Rikardsen ◽  
Martin Biuw ◽  
Lars Kleivane ◽  
Christina Lehmkuhl Noer ◽  
...  
Keyword(s):  
North Atlantic ◽  
Orcinus Orca ◽  
Diurnal Activity ◽  
Killer Whales ◽  
Northern Norway

scholarly journals Isotopic niche differs between seal and fish‐eating killer whales ( Orcinus orca ) in northern Norway

2020 ◽  
Vol 10 (9) ◽  
pp. 4115-4127 ◽  
Author(s):  
Eve Jourdain ◽  
Clare Andvik ◽  
Richard Karoliussen ◽  
Anders Ruus ◽  
Dag Vongraven ◽  
...  
Keyword(s):  
Orcinus Orca ◽  
Isotopic Niche ◽  
Killer Whales ◽  
Northern Norway

Surface and underwater observations of cooperatively feeding killer whales in northern Norway

1993 ◽  
Vol 71 (8) ◽  
pp. 1494-1499 ◽  
Author(s):  
Tiu Similä ◽  
Fernando Ugarte
Keyword(s):  
Clupea Harengus ◽  
Orcinus Orca ◽  
Defence Mechanism ◽  
Killer Whales ◽  
Northern Norway ◽  
Schooling Fish ◽  
Feeding Techniques

Killer whales (Orcinus orca) feeding on herring (Clupea harengus) were observed both from the surface and underwater. We refer to one of the feeding techniques used by killer whales as the carousel method, whereby whales cooperatively herded herring into a tight ball close to the surface. During herding and feeding, whales swam around and under a school of herring, performing much lobtailing and porpoising. When the herring were gathered into a tight ball whales often swam with the white underside of their body towards the fish and emitted large bubbles close to the surface. While feeding, whales spent more time circling around the ball of fish than eating. Ball formation is a known defence mechanism used by schooling fish, and the effort by killer whales appeared to be directed towards keeping the ball very dense and close to the surface. The whales stunned their prey by slapping the edge of the school with the underside of their flukes and then ate the stunned fish one by one. The tail slaps created a loud banging sound which could have been either a by-product or an aid to stunning the prey.

Pod-specific call repertoires and compound calls of killer whales, Orcinus orca Linnaeus, 1758, in the waters of northern Norway

1995 ◽  
Vol 73 (6) ◽  
pp. 1037-1047 ◽  
Author(s):  
Hanne Strager
Keyword(s):  
Orcinus Orca ◽  
Vocal Repertoire ◽  
Killer Whales ◽  
Northern Norway

Underwater vocalizations of 9 photoidentified pods of killer whales (Orcinus orca) were recorded in northern Norway from 1986 to 1992. In total, 34 call types and 20 subtypes were identified from the recordings. The pods had repertoire sizes ranging from 3 to 16 call types (average 9.0 call types). Pod-specific calls were found in 6 of the 9 pods. All pods had a unique repertoire combination. This study thus supports the hypothesis that vocal traditions are characteristic of killer whales. Some calls were combined, forming a total of 21 different syntactically organized compound calls. The function of this was not known, but it was suggested that adding size and flexibility to a small and rigid vocal repertoire may be advantageous.

Personality in captive killer whales (Orcinus orca): A rating approach based on the five-factor model.

2019 ◽  
Vol 133 (2) ◽  
pp. 252-261 ◽  
Author(s):  
Yulán Úbeda ◽  
Sara Ortín ◽  
Judy St. Leger ◽  
Miquel Llorente ◽  
Javier Almunia
Keyword(s):  
Factor Model ◽  
Five Factor Model ◽  
Orcinus Orca ◽  
Killer Whales
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