Invasions of harp seals Phoca groenlandica Erxleben to coastal waters of Norway in 1995: Ecological and demographic implications

Sarsia

Volumn 83, Issue 4, 1998, Pages 337-345

  Nilssen, Kjell T ^a   Haug, Tore ^a   Øritsland, Torger ^b   Lindblom, Lotta ^a   Kjellqwist, Sten A ^a  

^a NORWEGIAN INSTITUTE OF FISHERIES AND AQUACULTURE RESEARCH   (Norway)

^b INSTITUTE OF MARINE RESEARCH   (Norway)

Author keywords

Age compositions; Condition; Diet; Invasions; Northeast Atlantic: Harp seals

Indexed keywords

ANIMALIA; GADUS MORHUA; MELANOGRAMMUS AEGLEFINUS; PHOCA GROENLANDICA; PHOCIDAE; POLLACHIUS VIRENS;

EID: 0347087974     PISSN: 00364827     EISSN: None     Source Type: Journal    
DOI: 10.1080/00364827.1998.10413693     Document Type: Article

References (40)

1. Anon. 1994. Ressursoversikt 1994. - Fisken og Havet 1994. (Særnummer 1). 104 pp.
2. - 1996a. Ressursoversikt 1996. - Fisken og Havel 1996. (Særnummer 1). 105 pp.
3. - 1996b. Report of the Atlanto-Scandian Herring and Capelin Working Group, Copenhagen, 12-18 October 1995. - ICES Council Meettng 1996. Assess: 9. 155 pp (Mimeo).
4. Benjaminsen, T. 1979. Pup production and sustainable yield of White Sea harp seals. - Fiskeridirektoratets Skrifter. Serie Havundersokelser 16:551-559.
5. Bjørge, A., I. Christensen, & T. Øritsland 1981. Current problems and research related to interactions between marine mammals and fisheries in Norwegian coastal and adjacent waters. - ICES Council Meeting 1981. N:18. 10 pp. (Mimeo).
6. Bowen, W.D., D.E. Sergeant & T Øritsland 1983. Validation of Age Estimation in the Harp Seal, Phoca groenlandica. Using Dentinal Annuli. - Canadian Journal of Fisheries and Aquatic Sciences 40:1430-1441.
7. Breiby, A. 1985. Otolitter fra saltvannsfisker i Nord-Norge. -Tromura 53. Universitetet i Tromsø. 30 pp.
8. Chapskii, K.K. 1961 (1962). Nektoroye ekologicheskie obosnovaniya sezonnoi dynamiki areala belomorskoi populyatsiy grenlandskogo tyulenya (Pagophoca groenlandica) (Some biological factors determining seasonal changes in distribution of the White Sea harp seal population (Pagophoca groenlandica)). - Trudy Soveshchanii, Ikhtiologicheskoi Komissii Akademii Nauk SSSR 12:150-163 (Translated by the Bureau for Translations, Foreign Language Division, Department of the Secretary of State of Canada 380:1-22).
9. Chapskii, K.K. 1961 (1962). Nektoroye ekologicheskie obosnovaniya sezonnoi dynamiki areala belomorskoi populyatsiy grenlandskogo tyulenya (Pagophoca groenlandica) (Some biological factors determining seasonal changes in distribution of the White Sea harp seal population (Pagophoca groenlandica)). - Trudy Soveshchanii, Ikhtiologicheskoi Komissii Akademii Nauk SSSR 12:150-163 (Translated by the Bureau for Translations, Foreign Language Division, Department of the Secretary of State of Canada 380:1-22).
10. Enckell, P.H. 1990. Fältfauna / Kräftdjur. - Bokforlaget Sigmun i Lund. 685 pp.
11. Gjosæter, H. 1995. Pelagic Fish and the Ecological Impact of the Modern Fishing Industry in the Barents Sea. -Arctic 48(3):267-278.
12. Harkönen, T. 1986. Guide to the otoliths of the bony fishes of the northeast Atlantic. - Danbiu ApS, Biological consultants. 256 pp.
13. Haug, T., H. Gjøsæter, U. Lindstrom & K.T. Nilssen 1995. Diet and food availability for north-east Atlantic minke whales (Balaenoptera acutorostrata), during the summer of 1992. - ICES Journal of Marine Science 52:77-86.
14. Haug, T., A.B. Krøyer, K.T. Nilssen, K.I. Ugland & P.E. Aspholm 1991. Harp seal Phoca groenlandica invasions in Norwegian coastal waters: age composition and feeding habits. - ICES Journal of Marine Science 48:363-371.
15. Haug, T. & K.T. Nilssen 1995. Ecological implications of harp seals Phoca groenlandica invasions in northern Norway. - Pp. 545-556 in Schytte-Blix, A., L. Walløe & Ø. Ulltang (eds). - Whales, seals, fish and man, Elsevier Science B.V.
16. Haug, T., K.T. Nilssen, N. Øien & V. Potelov 1994. Seasonal distribution of Barents Sea harp seals (Phoca groenlandica). - Polar Research 13:163-172.
17. Hyslop, E. J. 1980. Stomach content analysis - a review of methods and their application. - Journal of Fish Biology 17:411-429.
18. Jobling, M. & A. Breiby 1986. The use and abuse of fish otoliths in studies of feeding habits of marine piscivores. - Sarsia 71:265-274.
19. Kjellqwist, S.A., T. Haug & T. Øritsland 1995. Trends in age-composition, growth and reproductive parameters of Barents Sea harp seals, Phoca groenlandica. - ICES Journal of Marine Science 52:197-208.
20. Murie, D.J. & D.M. Lavigne 1985. Digestion and retention of Atlantic herring otoliths in the stomachs of grey seals. -Pp. 292-299 in: Beddington, J.R., R.J.H. Beverton & D.M. Lavigne (eds). Marine Mammals and Fisheries. George Allen & Unwin, London. 354 pp.
21. Nazarenko, Y.I., & Y.K. Timoshenko 1974. Age structure and sex ratio in the White Sea population of Pagophoca groenlandica as an index of efficiency of protective measures. - Zoologicheskii Zhurnal 53(2):256-262.
22. Nilssen, K.T 1995. Seasonal distribution, condition and feeding habits of Barents Sea harp seals (Phoca groenlandica). - Pp. 241-254 in: Schytte-Blix, A., L. Walløe & Ø. Ulltang (eds). Whales, seals, fish and man. Elsevier Science B.V.
23. Nilssen, K.T., I. Ahlquist, J.-E. Eliassen, T. Haug & L. Lindblom 1994. Studies of food availability and diets of harp seals (Phoca groenlandica) in the southeastern Barents Sea in February 1993. - ICES Council Meeting 1994, N:12. 24 pp. (Mimeo).
24. Nilssen, K.T., P. Grotnes & T. Haug 1992. The effect of invading harp seals (Phoca groenlandica) on local coastal fish stocks in North Norway. - Fisheries Research 13:25-37.
25. Nilssen, K.T., P.E. Grotnes, T. Haug & Potelov, V. 1997. Seasonal variation in body condition of adult Barents Sea harp seals (Phoca groenlandica). - Journal of Northwest Atlantic Fisheries Science 22:17-25.
26. Nilssen, K.T., T. Haug, V. Potelov, V.A. Stasenkov & Y.K. Timoshenko 1995a. Food habits of harp seals (Phoca groenlandica) during lactation and moult in March-May in the southern Barents Sea and White Sea. - ICES Journal of Marine Science 52:33-41.
27. Nilssen, K.T., T. Haug, V. Potelov & Y.K. Timoshenko 1995b. Feeding habits of harp seals (Phoca groenlandica) during early summer and autumn in the northern Barents Sea. - Polar Biology 15:485-493.
28. Nordøy, E.S. 1995. Gastroliths in the harp seal Phoca groenlandica. - Polar Research 14:335-338.
29. Øien, N. & T. Øritsland, T. 1995. Use of mark-recapture experiments to monitor seal populations subject to catching. -Pp. 35-45 in: Schytte-Blix, A., L. Walloe & Ø. Ulltang, Ø. (eds). Whales, seals, fish and man. Elsevier Science B.V.
30. Øritsland, T. 1990. Seals in the northeast Atlantic and interactions with fisheries. - Commité Arctique International Commentary 2:10-13.
31. Øritsland, T. 1995. Norsk fangst og undersokelser av sel i 1994 (Norwegian catches and investigations of seals i 1994). (Summary in English). - Fisken og Havet 1995(3). 22 pp.
32. Øritsland, T. 1996. Norsk fangst og undersøkelser av sel i 1995 (Norwegian catches and investigations of seals i 1995). (Summary in English). - Fisken og Havel 1996(6), 19 pp.
33. Pethon, P. 1985. Aschehougs store fiskebok. - H. Aschehoug & Co. (W. Nygaard) A/S 1985, 447 pp.
34. Pierce, G.J. & P.R. Boyle 1991. A review of methods for diet analysis of piscivorous marine mammals. - Oceanography and Marine Biology: Annual Review 29:409-486.
35. Ryg, M., C. Lydersen, N.H. Markussen, T.G. Smith & N.A. Øritsland 1990. Estimating the blubber content of phocid seals. - Canadian Journal of Fisheries and Aquatic Sciences 47:1223-1227.
36. Sergeant, D.E. 1991. Harp seals, man and ice. - Canadian Special Publication of Fisheries and Aquatic Sciences 114. 153 pp.
37. Timoshenko, Y.K. 1995. Harp seals as indicators of the Barents Sea ecosystem. - Pp. 509-523 in: Schytte-Blix, A., L. Walløe & Ø. Ulltang (eds). Whales, seals, fish and man. Elsevier Science B.V.
38. Treacy, S.D. & T.W. Crawford 1981. Retrieval of otoliths and statoliths from gastrointestinal contents and scats of marine mammals. - Journal of Wildlife Management 45:990-993.
39. Ugland, K.I., K.A. Jødestøl, P.E. Aspholm, A.B. Krøyer & T. Jakobsen 1993. Fish consumption by invading harp seals off the Norwegian coast in 1987 and 1988. - ICES Journal of Marine Science 50:27-38.
40. Wiig, Ø. 1988. Grønlandssel og selinvasjon Hva vet vi - hva tror vi. - Naturen 2:35-41.