Blar i Brage IMR på forfatter "Sergeant, David E."
-
Feeding rates of cetacea
Sergeant, David E. (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969)1. The feeding rate of a whale is defined as the weight of daily food ingested expressed as percentage of body weight. Records of daily rations of Delphinoidea (porpoises and dolphins) in captivity allow calculation of ... -
Validation of age estimation in the Harp seal, Phoca groenlandica, using dentinal annuli
Bowen, W. D.; Sergeant, David E.; Øritsland, Torger (Journal article; Peer reviewed, 1983)We investigated the validity and accuracy of age estimation in harp seals, Phoca groenlandica, using a sample of 155 known-age teeth from seals age 3 mo to 10 yr. Under transmitted light, transverse sections of harp seal ...