Pup production and sustainable yield of white sea harp seals
Pup production and sustainable yield of White Sea harp seals.FiskDir. Skr. Ser. HavUnders., 16: 551-559. Pup production from 1962 to 1965 was estimated by a survival index method from age composition of Norwegian samples of moulting harp seals collected in the southeastern Barents Sea from 1964 to 1...
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[Fiskeridirektoratets havforskningsinstitutt]
1979
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ftimr:oai:imr.brage.unit.no:11250/114746 2023-05-15T15:38:52+02:00 Pup production and sustainable yield of white sea harp seals Benjaminsen, Terje 1979 357272 bytes application/pdf http://hdl.handle.net/11250/114746 eng eng [Fiskeridirektoratets havforskningsinstitutt] Fiskeridirektoratets skrifter, Serie Havundersøkelser vol 16 no 14 http://hdl.handle.net/11250/114746 s. 551-559 Research report 1979 ftimr 2021-09-23T20:15:41Z Pup production and sustainable yield of White Sea harp seals.FiskDir. Skr. Ser. HavUnders., 16: 551-559. Pup production from 1962 to 1965 was estimated by a survival index method from age composition of Norwegian samples of moulting harp seals collected in the southeastern Barents Sea from 1964 to 1972. Pup production decreased from 130 thousand in 1962 to 98 thousand in 1965. From these estimates production was projected forward to give an estimate of 172 thousand pups produced in 1978, corresponding to a total stock of one year old and older harp seals of about 800 thousand. Both the projection and the number of adult females in the whelping patches estimated from Soviet aerial surveys give an annual increase of about 5% since 1968. The sustainable yield for 1978 is estimated at 98 thousand pups and 8 thousand one year and older animals. Report Barents Sea White Sea Institute for Marine Research: Brage IMR Barents Sea White Sea |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Pup production and sustainable yield of White Sea harp seals.FiskDir. Skr. Ser. HavUnders., 16: 551-559. Pup production from 1962 to 1965 was estimated by a survival index method from age composition of Norwegian samples of moulting harp seals collected in the southeastern Barents Sea from 1964 to 1972. Pup production decreased from 130 thousand in 1962 to 98 thousand in 1965. From these estimates production was projected forward to give an estimate of 172 thousand pups produced in 1978, corresponding to a total stock of one year old and older harp seals of about 800 thousand. Both the projection and the number of adult females in the whelping patches estimated from Soviet aerial surveys give an annual increase of about 5% since 1968. The sustainable yield for 1978 is estimated at 98 thousand pups and 8 thousand one year and older animals. |
format |
Report |
author |
Benjaminsen, Terje |
spellingShingle |
Benjaminsen, Terje Pup production and sustainable yield of white sea harp seals |
author_facet |
Benjaminsen, Terje |
author_sort |
Benjaminsen, Terje |
title |
Pup production and sustainable yield of white sea harp seals |
title_short |
Pup production and sustainable yield of white sea harp seals |
title_full |
Pup production and sustainable yield of white sea harp seals |
title_fullStr |
Pup production and sustainable yield of white sea harp seals |
title_full_unstemmed |
Pup production and sustainable yield of white sea harp seals |
title_sort |
pup production and sustainable yield of white sea harp seals |
publisher |
[Fiskeridirektoratets havforskningsinstitutt] |
publishDate |
1979 |
url |
http://hdl.handle.net/11250/114746 |
geographic |
Barents Sea White Sea |
geographic_facet |
Barents Sea White Sea |
genre |
Barents Sea White Sea |
genre_facet |
Barents Sea White Sea |
op_source |
s. 551-559 |
op_relation |
Fiskeridirektoratets skrifter, Serie Havundersøkelser vol 16 no 14 http://hdl.handle.net/11250/114746 |
_version_ |
1766370260302168064 |