caa a22 4500 397550456 CHVBK 20180308164748.0 cr unu---uuuuu 161202e199602 xx s 000 0 eng 10.1006/jmsc.1996.0006 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0006 Evidence of a decline in beluga, Delphinapterus leucas, abundance off West Greenland [Elektronische Daten] [M. P. Heide-Jørgensen, Randall R. Reeves] Aerial surveys of belugas, or white whales,Delphinapterus leucas, were conducted off West Greenland in March 1993 and 1994. These surveys were designed to permit comparisons with similar surveys in 1981, 1982, and 1991. Differences in methods between the surveys in the early 1980s and those in the 1990s should mean that the 1990s surveys were, if anything, more efficient than the 1980s surveys. Weighted linear regressions of strip-census estimates of the relative abundance of belugas showed a significant decline from 1981 to 1994. While annual variability in ice conditions and other unknown factors may have had some local or small-scale effects on the movements and distribution of belugas off West Greenland, it is unlikely that these effects would account for the apparent decline in relative abundance. The most reasonable conclusion is that the stock size has declined considerably during the past 13 years, perhaps by as much as 62%. © 1996 International council for the Exploration of the Sea Articles nationallicence beluga nationallicence Delphinapterus cas nationallicence aerial survey nationallicence West Greenland nationallicence Heide-Jørgensen M. P. Marine Mammal Section, Greenland Fisheries Research Institute Tagensvej 135, DK-2200 Copenhagen N, Denmark aut Reeves Randall R. Okapi Wildlife Associates 27 Chandler Lane, Hudson, Quebec, J0P 1H0, Canada aut ICES Journal of Marine Science Oxford University Press 53/1(1996-02), 61-72 1054-3139 53:1<61 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0006 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0006 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Heide-Jørgensen M. P. Marine Mammal Section, Greenland Fisheries Research Institute Tagensvej 135, DK-2200 Copenhagen N, Denmark aut NATIONALLICENCE 700 1- Reeves Randall R. Okapi Wildlife Associates 27 Chandler Lane, Hudson, Quebec, J0P 1H0, Canada aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/1(1996-02), 61-72 1054-3139 53:1<61 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford