Investigations on Cetacea (1993)
The olfactory system of the harbour porpoise is reduced but has a function. The visual system of the harbour porpoise is badly developed, and its inferior to the one of…
Near field, interference, far field and rostrum structure in the echolocation system of cetaceans
Pilleri, G.; Gihr, M.; Kraus, C.
Investigations on Cetacea (1983)
This monograph may be regarded as an important supplement to the book »Echolocation in Whales and Dolphins» by Purves and Pilleri, published by the Academic Press, London, 1983. It contains…
The ambient noise in the environment of Sousa plumbea and Neophocaena phocaenoides (Cetacea) with special reference to the sounds of Johnius belangerii (Pisces, Sciaenidae)
Pilleri, G.; Kraus, C.; Gihr, M.
Investigations on Cetacea (1982)
In the Piti Mouth, a typical biotope of Sousa plumbea and Neophocaena phocaenoides in the Indus delta, the sounds produced by Johnius belangerii (Boro) and the rather weaker crustacean sounds…
On the behaviour and study of the harbour porpoise, Phocoena phocoena, in the wild
Amundin, M.; Amundin, B.
Investigations on Cetacea (1974)
A pilot study has been carried out in order to obtain information on the observational problems encountered in studying the harbour porpoise (Phocoena phocoena) in the wild. It is concluded…
Acoustic signals from free-ranging finless porpoises (Neophocaena phocaenoides) in the waters around Hong Kong
Goold, J. C.; Jefferson, T. A.
The Raffles Bulletin of Zoology (2002)
Acoustic signals from free-ranging finless porpoises were recorded in the waters around Hong Kong during March 2000. Finless porpoises produced short-duration high-frequency clicks. Signal analysis showed finless porpoise clicks to…
Ultra-high foraging rates of harbor porpoises make them vulnerable to anthropogenic disturbance
Wisniewska, Danuta Maria; Johnson, Mark; Teilmann, Jonas; Rojano-Doñate, Laia; Shearer, Jeanne; Sveegaard, Signe; Miller, Lee A.; Siebert, Ursula; Madsen, Peter Teglberg
Current Biology (2016)
The question of how individuals acquire and allocate resources to maximize fitness is central in evolutionary ecology. Basic information on prey selection, search effort, and capture rates are critical for…
Diel and seasonal patterns in acoustic presence and foraging behaviour of free-ranging harbour porpoises
Schaffeld, T.; Bräger, S.; Gallus, A.; Dähne, M.; Krügel, K.; Herrmann, A.; Jabbusch, M.; Ruf, T.; Verfuß, U. K.; Benke, H.; Koblitz, J. C.
Marine Ecology Progress Series (2016)
A temporal and geographical analysis of echolocation activity can give insights into the behaviour of free-ranging harbour porpoises Phocoena phocoena. Seasonal and diel patterns in the presence and foraging activity…
Echolocation behavior of harbor porpoises Phocoena phocoena around chemically enhanced gill nets
Cox, T. M.; Read, A. J.
Marine Ecology Progress Series (2004)
The echolocation behavior of harbor porpoises Phocoena phocoena around gillnets was monitored to test their response to chemically (BaSO4) enhanced gill nets, designed to be more acoustically reflective than commercial…
The status of the harbour porpoise, Phocoena phocoena, in Dutch waters and the state of related research in The Netherlands: An overview
Reijnders, P. J. H.; Leopold, M. F.; Camphuysen, C. J.; Heessen, H. J. L.; Kastelein, R. A.
Report of the International Whaling Commission (1996)
The reported decline of the harbour porpoise in the coastal areas of the North Sea after 1940, has also been seen in Dutch waters. Information on the distribution and abundance…
A review of studies on attempts to reduce the entanglement of the Dall’s Porpoise, Phocoenoides dalli, in the Japanese salmon gillnet fishery
Hatakeyama, Y.; Ishii, K.; Akamatsu, T.; Soeda, H.; Shimamura, T.; Kojima, T.
Report of the International Whaling Commission (1994)
Dall's porpoises, Phocoenoides dalli, were often incidentally caught in the Japanese salmon gillnet fishery in the North Pacific. In order to investigate the reasons for entanglement, their auditory characteristics and…