Recolonization of the dutch wadden sea by the grey seal. Grey and brown fur, sometimes with a pattern of blotches. Causes of mortality and nonfatal conditions among grey. Estimation of a killer whale orcinus orca populations diet. Cases with minimal scavenging and bloating were chilled as practical and. The plastics division grew steadily in size and importance. The antarctic minke is among the smallest of the baleen whales, with only the common minke and the pygmy right whale being smaller. Pdf grey seal halichoerus grypus distribution during.
The grey seal with a weight of up to 350 kg is much larger than the harbour seal weight up to kg. We combined regular censuses, photoidentification and satellite telemetry to investigate trends in grey seal abundance, site fidelity, individual movements and haulout site use. The eastern isles are one of three main grey seal halichoerus grypus pupping areas, western rocks and norrard rocks being the others. Ynes 1964 recorded 660 pups of grey seals in 1963 from merre to. Gray seals halichoerus grypus fabricius, 1791 were considered locally extinct in united states waters by 1958 but have since recolonized the region. Sea mammal research unit, university of st andrews.
University of massachusetts, boston, biology department. Halichoerus grypus grypus baltic sea, earlier known as h. Noaa higher education, 15 eastwest hwy, silver spring, md. Recent advances in managing and understanding enuresis. All structured data from the file and property namespaces is available under the creative commons cc0 license. For full access to this pdf, sign in to an existing account, or purchase an annual subscription. A survey was carried out on the condition of 188 live grey seal halichoerus grypus pups presented for rehabilitation from the coasts of southwest england between 1992 and 1998. Although considered generalists, less is known about gray seal foraging ecology in the united states. We now revisit an analysis of a grey seal halichoerus grypus track that was originally conducted by mcclintock et al. Halichoerus grypus wikipedia, le encyclopedia libere. Northeast fisheries observer program nefop observered incidental takes february 2015 06242015 100% of the observed incidental takes for february 2015 are represented in this summary page 1 of 1. To investigate call variation in pups of this species, 170 calls of ten individual pups were analysed. Pvc products cantex pvc products had its beginning over 40 years ago, as a division of a national corporation in the utility and building construction industry.
The text of this page is licensed under the creative commons attributionnoncommercial license version 3. Ca0818eapril 2014 solar 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 solar power center loadcenters 1 s. The neuropeptide hormone oxytocin plays an integral role in mammalian reproductive endocrinology and behaviour. A critical assessment of wales grey seal halichoerus grypus photoidentification database. Files are available under licenses specified on their description page. Observations made in the northwest atlantic seem to indicate that grey seals have a strong philopatry to their whelping sites, but considerable dispersion. Grey seal eastern atlantic population, gray seal, grey seal, horsehead seal, longnosed seal, grey seal, grey seal, atlantic grey seal, gray seal. Gas bubbles in seals, dolphins, and porpoises entangled and.
The grey seal halichoerus grypus is found on both shores of the north atlantic ocean. These consist of large paired posterior venae cavae, which at the level of the kidneys merge into one and communicate with very large hepatic sinuses to become a huge posterior caval vein, which immediately after passage through the diaphragm is surrounded by a caval sphincter that is able to completely restrict the passage of blood into the heart. Observations on the grey seal halichoerus grypus at ramsey island, pembrokeshire. Effects of environmental variables on surface temperature of breeding adult female northern elephant seals, mirounga angustirostris, and pups author links open overlay panel sarah a. Documentation contains this abstract, questionnaire facsimiles, and record layouts of the file. In the north atlantic there are three main groups of grey seals, halichoerus grypus, centered in the baltic sea, the eastern north atlantic and the western north atlantic bonner 1981. A number of old concepts are discarded and new ones are proposed, particularly with. The grey seals seem to prefer the outlying skerries for their breeding while the common seals select more sheltered areas. The common minke whale is the smallest of the rorquals, and one of the smallest baleen whales second smallest only to the pygmy right whale.
Page designed through the cooperative efforts of interagency itis teams. The structural features of the venous system of seals, including such specialties as a caval sphincter, a huge posterior caval vein and hepatic sinuses, venous plexuses and a huge extradural intravertebral vein, are described and functional aspects of these features in relation to diving habits are discussed. We describe an unusual mating system, observed in a landbreeding colony of grey seal, halichoerus grypus, in the western atlantic. Commentary the venous system of seals, with new ideas on the.
Genetic analysis of fecal material collected in the field is therefore a useful tool for gaining insight into wild animal diets. Wiepkema zeedierenpark harderwijk harderwijk marine mammal park, strandboulevardoost1, 3841 ab harderwijk, holland. The responses of 65 individually identified females with pups toward known males and females were recorded throughout each females stage of lactation. The role of oxytocin in the maternal behaviour of the grey.
Repeatability and reproductive consequences of boldness in. Both of the species have been defined as critically endangered in the late 20th century but due to conservation schemes, harvest controls and enhanced environmental quality the situation of both species has ameliorated. The forgotten type specimen of the grey seal halichoerus. Full text full text is available as a scanned copy of the original print version. At present the harbour seal is the most numerous seal and the grey seal is relatively rare. Between 2008 and 2016, 469 females from the sable island, nova scotia breeding colony of gray seals were given. Here, we describe a grey seal skull held in the collections of the natural history museum of denmark, and. In this study, we used highthroughput dna sequencing to.
We used the pandaseq software program to align and merge the paired reads into a single sequence, using the default alignment threshold of 0. Get a printable copy pdf file of the complete article 567k, or click on a page image below to browse page by page. Dispersal and bycatch mortality in gray, halichoerus grypus, and harbor, phoca vitulina, seals tagged at the norwegian coast. Assessment of dietary patterns and prey consumption of. Fixed reference points of the eye and ear were used to define a rectangular area of pelage on the seals head, termed the identifier patch ip. In 1820, nilsson placed fabricius name in synonymy of his own halichoerus griseus, but in 1847 he coined the binomen halichoerus grypus the hooksnouted saltpig, henceforth accepted as the valid scientific name of the grey seal. However, the nomenclature of the grey seal halichoerus grypus fabricius 1791 has for many years been misled by two persistent assumptions. Lung tissue culture of two neonatal animals were used for the karyotypes displayed. Sheltered estuaries are used as haulout and breeding sites by common seals, while grey seal pups are found on rocky beaches and caves thompson et al. While working to improve my own teaching, i developed a lesson plan to teach mitosis and meiosis through movement. Pdf entanglement of grey seals halichoerus grypus at a. The grey seal, halichoerus gypus, and the common seal, phoca vitulina, are the only resident seals on the coast of the norwegian mainland.
Cheap and accessible method to aid individual photo. Halichoerus grypus fabricius, 1791 espesye sa mamipero nga una nga gihulagway ni fabricius ni adtong 1791 ang halichoerus grypus. However, incidental sightings of bottlenose dolphins tursiops truncatus travelling inside the ballyglass for inspection purposes only. Reproductive behaviour of the grey seal halichoerus. Seasonal variability and individual consistency in gray. Asterisk indicates that 2 sd standard deviation corresponds to igfi levels below the lower limit of the reference values adjusted for age. Marine biological station, port erin, and royal holloway college, university of london. Pdf the grey seal halichoerus grypus as a predator of. Here we present an investigation of avian iav infection in a 3to 4monthold grey seal halichoerus grypus pup, rescued from st michaels mount, cornwall in 2017. We are grateful to the following for their support of our research over the years which has allowed us to gather the data and experience to write this paper. Pdf dispersal and bycatch mortality in gray, halichoerus. Fepak sea mammal research unit, co british antarctic survey, high cross, madingley road, cambridge cb3 oet, uk accepted 2 april 1990 with 5 figures in the text this study presents the first direct. Create your account and submit your observations relative sizes of the different species of cetaceans frequenting the northwest atlantic cetacean species blue whale fin whale north atlantic right whale humpback whale minke whale sperm whale beluga whale harbour porpoise northern bottlenose whale longfinned pilot whale killer whale atlantic whitesided dolphin and whitebeaked dolphin seal. This seal tended to move in a clockwise fashion between two terrestrial haul.
A majority of them 542 were tagged at the ainov archipelago. Phocidae often pup in dense colonies, and regularly leave their offspring alone to go to sea, the selective pressure for mutual vocal recognition between mothers and pups could be high. Grey seal halichoerus grypus and atlantic salmon salmo salar in the northern baltic sea. No cetaceans were recorded throughout the period of the survey. Because the length of the amplicon was 330bp, there was a 65100bp region of overlap between the paired reads. My project focused on examining and identifying the stomach contents of gray halichoerus grypus atlantica and harp seals pagophilus groenlandicus accidentally killed in commercial fisheries off the northeast u. Izzy langley1, tobias rosas da costa oliver1,3, lex hiby2, thomas b stringell3, ceri w morris3 and patrick p pomeroy1 1. Laelaptidae by robert domrow1 i am most grateful to dr. Pdf behaviour of grey seals halichoerus grypus and. Materials acquired as adobe portable document format pdf files were also treated as scanned source maps i.
An halichoerus grypus in uska species han mammalia nga syahan ginhulagway ni fabricius hadton 1791. Estimating diet composition is important for understanding interactions between predators and prey and thus illuminating ecosystem function. Jan 06, 2016 reads were trimmed to remove adaptor and index sequences prior to further analysis. Hosted by the usgs core science analytics and synthesis. In this study, we assessed the influence of environmental and biological sources of variation on behavioral responses measured along the shybold continuum in a longlived, iteroparous marine mammal, the gray seal halichoerus grypus. Ginklasipika han iucn an species komo diri gud kababarakan. Acoustic structure and individual variation of grey seal. Males and females begin to visit the breeding beach about a week before the season begins, but none stay ashore for long until the first pup is born. This page was last edited on 23 december 2019, at 12. Halichoerus grypus vernacular names edit wikidata grey seal english.
All true seals have short flippers, which they use to move in a caterpillarlike motion on land. Interplay between arginine vasopressin avp and nocturnal enuresis ne. Western north atlantic stock stock definition and geographic range the gray seal halichoerus grypus atlantica is found on both sides of the north atlantic, with three major. It is a large seal of the family phocidae, which are commonly referred to as true seals or earless seals. Gressitt and miss setsuko nakata, of bishop museum, honolulu, for a fine series of all stages of this interesting halarachnine from antarctica. Balaenoptera acutorostrata society for marine mammalogy. The measurements of the lesions with traces of apparent canine teeth could be matched with the intercanine distance in grey seals.
Diagnostic approach of adult growth hormone deficiency aghd. Gas bubbles were found in 15 of 23 gillnetdrowned bycaught harp pagophilus groenlandicus, harbor phoca vitulina and gray halichoerus grypus seals, common delphinus delphis and whitesided lagenorhyncus acutus dolphins, and harbor porpoises phocaena phocaena but in only 1 of 41 stranded marine mammals. The diet of many species, however, is difficult to observe directly. In the north atlantic, norwegian whaling vessels in 1940 allegedly caught individuals of up to 10. An halichoerus grypus in nahilalakip ha genus nga halichoerus, ngan familia nga phocidae. Rates of increase in gray seal halichoerus grypus atlantica pupping at recolonized sites in the united states, 19882019 stephanie a wood. Canadian wildlife service, churchill northern studies centre, conservation manitoba, northern ecosystem initiative, nunavut wildlife management board, national sciences and engineering research council of canada, norwegian polar institute.
Grey seal halichoerus grypus quick facts recognition. Observations on the grey seal halichoerus grypus at. Giklaseklase sa iucn ang espesye sa kinaminosang kalabotan. Pdf conditions in grey seal pups halichoerus grypus. Ang halichoerus grypus sakop sa kahenera nga halichoerus sa kabanay nga phocidae.
Grey seal halichoerus grypus distribution during 198384 in the gulf of st. These consist of large paired posterior venae cavae, which at the level of the kidneys merge into one and communicate with very large hepatic sinuses to become a huge posterior caval vein, which immediately after passage through the diaphragm is surrounded by. It is the only species classified in the genus halichoerus. Get a printable copy pdf file of the complete article 1. Balaenoptera bonaerensis society for marine mammalogy.
The distinctive muzzle is particularly long, and wide at the end, with a fleshy mystacial area that somewhat obscures the lower jaw. The suckling period of a grey seal halichoerus grypus. Mammal species of the world a taxonomic and geographic reference. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse.
Pdf status of grey seals halichoerus grypus in norway. The suckling period of a grey seal halichoerus grypus while confined. The grey seal halichoerus grypus as a predator of harbour porpoises phocoena phocoena. During the period septemberdecember in 20012003, ship based surveys of grey seal halichoerus grypus pups, including tagging, counting and staging of pups, were conducted along the norwegian coast. As education and neuroscience begin to merge, creating the new field of brainbased education, teachers are working to integrate scientific research into the classroom. Both grey seals halichoerus grypus and common seals phoca vitulina are encountered in the open waters of the inner moray firth. A descriptive and quantitative comparison of the communication of grey seals, halichoerus grypus, at three sites in the north atlantic ocean lawson, john w. The opportunity is therefore taken to supplement existing descriptions, and to note new. Effects of environmental variables on surface temperature of. Grey seals halichoerus grypus and five of which were unidentified seals table 1.
As female grey seals halichoerus grypus pinnipedia. It has been utilised to study the physiological factors driving maternal behaviour in both laboratory and domestic mammals, but few studies have successfully detected oxytocin in wild individuals, or linked detected concentrations to the. Movements, diving and foraging behaviour of grey seals. A total of 612 grey seal halichoerus grypus pups were tagged on the murman coast, russia, in the years 1991, 1992 and 1994. Aggression of female grey seals halichoerus grypus toward conspecifics was studied during the pupping and mating season on sable island, n. Commentary the venous system of seals, with new ideas on. A third type of source, source information, encompasses information that was neither taken. This is the case in the baltic sea with grey seal halichoerus grypus and atlantic salmon salmo salar. Developments in the baltic grey seal halichoerus grypus and ringed seal phoca hispida populations during the 20th century. View the article pdf and any associated supplements and figures for a period of 48 hours. School enrollmentlibrary use supplement technical documentation.
1355 1169 1106 252 532 805 1407 1494 1498 1408 714 281 589 1437 1085 1262 165 449 262 113 152 334 1186 211 1452 1244 1479 1198 1500 621 1359 521 1452 1282 1105 818 1284 1177 227 845 566 1275 524 667 363