Abundance of Harbour Porpoise and Other Cetaceans in the North Sea and Adjacent Waters

• Published in: The Journal of applied ecology Vol. 39; no. 2; pp. 361 - 376
• Main Authors: Hammond, P. S., Berggren, P., Benke, H., Borchers, D. L., Collet, A., Heide-Jørgensen, M. P., Heimlich, S., Hiby, A. R., Leopold, M. F., Øien, N.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Science Ltd 01.04.2002; Blackwell Science; Blackwell Publishing Ltd
• Subjects: Aircraft; Animal, plant and microbial ecology; Animals; Applied ecology; aquatische ecologie; Biological and medical sciences; Cetaceans; conservation; Conservation, protection and management of environment and wildlife; dolfijnen; fauna; Fundamental and applied biological sciences. Psychology; General aspects. Techniques; Harbors; line transect sampling; management, minke whale; Marine; Marine ecology; Methods and techniques (sampling, tagging, trapping, modelling...); Noordzee; Parks, reserves, wildlife conservation. Endangered species: population survey and restocking; Phocoena phocoena; Porpoises; School size; Sea water; Seas; shortbeaked common dolphin; sightings survey; walvisachtigen; whitebeaked dolphin; zeezoogdieren; North Sea; Sensitivity analysis; Methodology; Interspecific comparison; Estimation; Phocoena phocoena; Transect method; Balaenoptera acutorostrata; Marine environment; Ship observation; Population survey; Vertebrata; Mammalia; Geographic distribution; Aircraft observation; Cetacea; Animal conservation; Ecological abundance

1. The status of small cetaceans in the North Sea and adjacent waters has been of concern for many years. Shipboard and aerial line transect surveys were conducted to provide accurate and precise estimates of abundance as a basis for conservation strategy in European waters. 2. The survey, known as...