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ICES Journal of Marine Science: Journal du Conseil 2003 60(5):1012-1017; doi:10.1016/S1054-3139(03)00095-X
© 2003 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
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Estimated pup production of harp seals Pagophilus groenlandicus in the White Sea, Russia, in 2000

V.A Potelov*, A.P Golikov and V.A Bondarev

Northern Branch of Polar Research Institute of Marine Fisheries and Oceanography (SevPINRO) 17 Uritskogo Street, 163002 Arkhangelsk, Russia

*Correspondence to V. A. Potelov; tel: +7 8182 661 649; fax: +7 8182 661 650. e-mail: imm{at}sevpinro.ru.

Since the 1960s pup production of harp seals Pagophilus groenlandicus in the White Sea was estimated from aerial photographic surveys of visible adult females on the ice. Adult abundance estimations were underestimated because an unknown number of females were in the water during the survey. The absence of a reliable estimation of pup production constrained management initiatives. Aerial photographic surveys of whelping harp seals were conducted in the White Sea 10–12 March 2000. Using a systematic strip transect survey design approach, the number of pups present was estimated as 294 914 with a standard error (s.e.) of 36 168. When pups caught by Russian sealers in the White Sea before the aerial surveys (30 729 pups) were included the total estimated number of pups was 325 643 (s.e. 36 168), whereas the number of adult harp seals was 215 943 (s.e. 22 630). The pup estimate was not corrected for pups born after the survey, but this was not considered to be significant. The new estimation of pup production is higher than thought earlier.

Keywords: aerial surveys, pup production, harp seals, White Sea

Received 17 April 2002; accepted 9 December 2002.


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Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002
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