Abstract
A sub-adult grey seal was caught and tagged with a satellite relay data logger at Tihällan (61°28′00″N, 17°25′40″E), Sweden, on 21 August 1992. We tracked it for 115 days during which time we recorded 841 locations, data on 3556 dives and 80 “haulout” periods. It travelled 730 km in the first 12 days to the southern Archipelago Sea. It stayed most of the remaining time within 25 km of a haulout site, with a major exception of an 8-day trip of 520 km. Dive shape and swimming activity were used to distinguish dive types. Square-shaped “foraging” dives were more common over the midday period. “Haulout” periods were more common during the night.
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References
Almkvist L (1982) Baltic marine mammals — a status report. ICES C.M. 1982/N:16
Baker JR, Fedak MA, Anderson SS, Arnbom T, Baker R (1990) Use of tiletamine-zolazepam mixture to immobilise wild grey seals and southern elephant seals. Vet Rec 126:75–77
Cameron AW (1970) Seasonal movements and diurnal activity rhythms of the grey seal (Halichoerus grypus). J Zool London 161:15–23
Fedak MA, Thompson D (1993) Behavioural and physiological options in diving seals. In: Boyd IL (ed) Marine mammals: advances in behavioural and population biology. Oxford University Press, Oxford, pp 333–348
Fedak MA, Anderson SS, Curry MG (1983) Attachment of a radio tag to the fur of seals. J Zool London 200:298–300
Helle E, Stenman O (eds)(1990) Baltic seal populations 1986–1990 (In Finnish or Swedish with English abstract). Maailman Luonnon Säätiön WWF Suomen Rahaston Raportteja No. 3, p 76
ICES (1994) Report of the study group on seals and small cetaceans in European seas. ICES C.M. 1994/N:2
Lydersen C (1991) Monitoring ringed seal (Phoca hispida) activity by means of acoustic telemetry. Can J Zool 69:1178–1182
McConnell BJ, Chambers C, Fedak MA (1992) Foraging ecology of southern elephant seals in relation to the bathymetry and productivity of the Southern Ocean. Antarct Sci 4:393–398
Olsson M, Andersson Ö, Bergman A, Blomkvist G, Frank A, Rappe C (1992) Contaminants and diseases in seals from Swedish waters. Ambio 21:561–562
Stewart BS (1984) Diurnal hauling patterns of harbor seals at San Miguel Island, California. J Wildl Manage 48:1459–1461
Thompson D, Hammond PS, Nicholas KS, Fedak MA (1991a) Movements, diving and foraging behaviour of grey seals (Halichoerus grypus). J Zool London 224:223–232
Thompson D, Hiby AR, Fedak MA (1993) How fast should I swim? Behavioural implications of diving physiology. In: Boyd IL (ed) Marine mammals: advances in behavioural and population biology. Oxford University Press, Oxford, pp 349–368
Thompson PM, Pierce GJ, Hislop JRG, Miller D, Diack JSW (1991b) Winter foraging by common seals (Phoca vitulina) in relation to food availability in the inner Moray Firth N.E. Scotland. J Anim Ecol 60:283–294
Yochem PK, Stewart BS, DeLong RL, DeMaster DP (1987) Diel haul-out patterns and site fidelity of harbour seals (Phoca vitulina richardsi) on San Miguel Island, California, in autumn. Mar Mammal Sci 3:323–332
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Sjöberg, M., Fedak, M.A. & McConnell, B.J. Movements and diurnal behaviour patterns in a Baltic grey seal (Halichoerus grypus). Polar Biol 15, 593–595 (1995). https://doi.org/10.1007/BF00239652
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DOI: https://doi.org/10.1007/BF00239652