First independent feeding of harp seal (&lt;i&gt;Phoca groenlandica&lt;/i&gt;) and hooded seal (&lt;i&gt;Cystophora cristata&lt;/i&gt;) pups in the Greenland Sea

Haug, Tore; Nilssen, Kjell Tormod; Lindblom, Lotta

doi:10.7557/3.2969

Cited by 17 publications

(12 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hooded seals have long been known to co-occur with harp seals in the drift ice waters of the Greenland Sea along the east coast of Greenland during spring, when both species breed (March/ April: see Wollebaek 1907;Iversen 1927;Rasmussen 1957;Folkow & Blix 1995;Folkow et al 1996Folkow et al , 2004Haug et al 2000;Potelov et al 2000). Recent information, obtained in satellite tagging programmes, about the migratory patterns of the two seal species indicate that they may also co-occur in the Greenland Sea pack ice outside the breeding period (Folkow et al 1996(Folkow et al , 2004.…”

Section: Discussionmentioning

confidence: 99%

“…Hooded seals, Cystophora cristata, occur in the drift ice waters of the Greenland Sea along the east coast of Greenland (also called the West Ice) during breeding and moult (March/April; see Rasmussen 1957Rasmussen , 1960Folkow & Blix 1995;Folkow et al 1996;Haug et al 2000;Potelov et al 2000). Recent information about the migratory patterns of the species obtained in satellite tagging programmes has indicated that hooded seals may also occur in the Greenland Sea pack ice in considerable periods outside the breeding and moulting period (Folkow et al 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Except for some observations made in the West Ice during breeding and moult (i.e. spring; see Haug et al 2000;Potelov et al 2000), which are known to be periods with low feeding intensity (Rasmussen 1960;Kovacs & Lavigne 1986), only occasional information, mostly from coastal areas of eastern Greenland and northern Iceland, was available (Hauksson & Bogason 1997;Kapel 2000). Although hooded seal migrational patterns outside the West Ice breeding and moulting periods are fairly well known from the recent satellite tagging programme (Folkow & Blix 1995Folkow et al 1996), the diet of these animals in the same period has remained poorly documented.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diets of hooded seals (Cystophora cristata) in coastal waters and drift ice waters along the east coast of Greenland

Haug

Nilssen

Lindblom

et al. 2007

Marine Biology Research

Self Cite

View full text Add to dashboard Cite

To provide data on the diets of hooded seals (Cystophora cristata ) in the Greenland Sea, seals were collected for scientific purposes on expeditions conducted in the pack ice belt east of Greenland in September/October 1999 and 2003, July/August in 2000 (summer), and February/March in 2001 and 2002 (winter). The results from analyses of stomach and intestinal contents from captured seals revealed that their diet was comprised of relatively few prey taxa. The squid Gonatus fabricii and polar cod (Boreogadus saida ) were particularly important, whereas capelin (Mallotus villosus ) and sand eels (Ammodytes spp.) occasionally contributed more. These four prey items constituted 60 Á97% of the diet biomass. Gonatus fabricii was the most important food item in autumn and winter, whereas polar cod dominated the summer diet, with important contributions from G. fabricii and sand eels. The latter was only observed on the hooded seal menu during the summer period, whereas polar cod, which was an important component during the autumn survey, was almost absent from the winter samples. During the latter survey, capelin also contributed to the hooded seal diet. Samples obtained from hooded seals in more coastal waters indicated a more varied diet based on fish such as polar cod, redfish (Sebastes sp.) and Greenland halibut (Reinhardtius hippoglossoides ).

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Diets of hooded seals (Cystophora cristata) in coastal waters and drift ice waters along the east coast of Greenland

Haug

Nilssen

Lindblom

et al. 2007

Marine Biology Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…The pups leave the pack-ice at approximately 1 mo of age and lead a solitary pelagic life for the subsequent months, visiting distant foraging areas (Folkow et al 2010), resembling the pattern of adults (Folkow et al 1996). The diet of a hooded seal pup during the first month consists almost exclusively of crustaceans (Haug et al 2000). Later, for older seals, when associated with the pack-ice, the diet consists of prey species found at greater depths (Haug et al 2004, with no apparent differences in prey composition between young (< 2 yr) and older seals ).…”

Section: Discussionmentioning

confidence: 99%

Age-dependent prevalence of anti-Brucella antibodies in hooded seals Cystophora cristata

et al. 2013

View full text Add to dashboard Cite

Investigations of hooded seals Cystophora cristata have revealed high prevalences of Brucella-positive seals in the reduced Northeast Atlantic stock, compared to the increasing Northwest Atlantic stock. This study evaluated the relation between Brucella-serostatus in seals in the Northeast Atlantic stock and age, sex, body condition and reproduction. Bacteriology documented which animals and organs were B. pinnipedialis positive. No relationship was observed between Brucella-serostatus and body condition or reproductive traits. Pups (<1 mo old) had a substantially lower probability of being seropositive (4/159, 2.5%) than yearlings (6/17, 35.3%), suggesting that exposure may occur post-weaning, during the first year of life. For seals >1 yr old, the mean probability of being seropositive decreased with age, with no seropositives older than 5 yr, indicating loss of antibody titre with either chronicity or clearance of infection. The latter explanation seems to be most likely as B. pinnipedialis has never been isolated from a hooded seal >18 mo old, which is consistent with findings in this study; B. pinnipedialis was isolated from the retropharyngeal lymph node in 1 seropositive yearling (1/21, 5%). We hypothesize that this serological and bacteriological pattern is due to environmental exposure to B. pinnipedialis early in life, with a subsequent clearance of infection. This raises the question of a reservoir of B. pinnipedialis in the hooded seal food web.KEY WORDS: Pinniped · Pups · Brucellosis · Serostatus · Bacteriology · Infection clearance · Atlantic hooded seal stock · Food web Resale or republication not permitted without written consent of the publisherDis Aquat Org 106: [187][188][189][190][191][192][193][194][195][196] 2013 Greenland (NWS) (Andersen et al. 2009) and the Nordic Seas (Greenland, Norwegian and Icelandic Seas, NES) (Folkow et al. 1996(Folkow et al. , 2010.While estimates of abundance in the NWS have increased since the 1980s (Hammill & Stenson 2006), abundance of the NES appears to have decreased to only 10 to 15% of the 1946 population size, from 575 000 hooded seals in 1946 to approximately 85 000 hooded seals in 2011, and has remained stable at this low level since the 1980s (ICES 2011). Hooded seal hunts in the West Ice have been conducted since the 18th century, and after 1920 the hunt was of a significant extent. In 1958, agreements were made between Norway and the Soviet Union on time and activity restrictions on the hooded seal hunt in the West Ice, but it was not until 1971 that quotas were introduced (Bjørge 2010). The introduction of quotas did not alter the negative population development in the NES, and due to the decline of the NES, no commercial hunt has been conducted on the NES since 2007 (ICES 2011), and the hooded seal species has been classified since 2008 as 'Vulnerable' in the Red List of Threatened Species of the International Union for Conservation of Nature (IUCN) (Kovacs 2008).Brucella spp. were first isolated from marine mammals in 1994 (Ross et al....

show abstract

“…Haug,K. T. Nilssen & L. Lindblom,Institute of Marine Research,Tromsø Branch,Box 6404,Norway,tore.haug@imr.no. Harp (Phoca groenlandica) and hooded (Cystophora cristata) seals co-occur in the drift ice waters of the Greenland Sea along the east coast of Greenland during breeding and moulting (March-June; see Sergeant 1991;Folkow & Blix 1995;Folkow et al 1996;Haug et al 2000;Potelov et al 2000). In this area, previous studies of the two species have concentrated mainly on stock size estimation, reproduction and migration patterns (Øritsland 1959, 1964Øien & Ørits-land 1995;Folkow & Blix 1995, 1999Folkow et al 1996;ICES 1998ICES , 2004Frie et al 2003;Folkow et al 2004).…”

mentioning

confidence: 99%

Feeding habits of harp and hooded seals in drift ice waters along the east coast of Greenland in summer and winter

2004

Self Cite

View full text Add to dashboard Cite

First independent feeding of harp seal (<i>Phoca groenlandica</i>) and hooded seal (<i>Cystophora cristata</i>) pups in the Greenland Sea

Cited by 17 publications

References 13 publications

Diets of hooded seals (Cystophora cristata) in coastal waters and drift ice waters along the east coast of Greenland

Diets of hooded seals (Cystophora cristata) in coastal waters and drift ice waters along the east coast of Greenland

Age-dependent prevalence of anti-Brucella antibodies in hooded seals Cystophora cristata

Feeding habits of harp and hooded seals in drift ice waters along the east coast of Greenland in summer and winter

Contact Info

Product

Resources

About