{"refrec":{"BRefID":10850,"RR":"<b>Seys, J.; Meire, P.; Kuijken, E.</b> (1993). Resultaten van stookolieslachtoffer-onderzoek langs de Vlaamse kust tijdens de winter 1992-93. <i>Rapport Instituut voor Natuurbehoud</i>, 93.15. Instituut voor Natuurbehoud: Hasselt.  17 pp.","BEntID":10850,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Rapport Instituut van het Instituut voor Natuurbehoud</i>, 93.15. Instituut voor Natuurbehoud: Hasselt.  17 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Seys, J.; Meire, P.; Kuijken, E.","OrigTitleTranslFlag":1,"Authorstringtrunc":"Seys, J. <i>et al.</i>","Englishabstract":"With weakly counts of a permanent beach-traject (Oostende-Nieuwpoort: 16.5 kms), five monthly counts of the whole Flemish coastline and some additional counts, 850 km of beach has been surveyed for beached birds. Another 180 birds were collected from four rehabilitation centres situated along the Flemish coast. The winter 1992-93 started with only small numbers of beached birds ( < 1 ex./km), with oil-rates of 30-45%. In the first half of January, numbers increased (particularly Waders) for the first time, due to a short period with low temperatures at the end of December. At the end of January densities increased again (up to 4 ex./km), because of increased numbers of Kittiwakes and large numbers of young, starved Guillemots. These Guillemots have very low oil-rates (11%) and are a typical example of an so-calied \"auck-wreck\". Backgrounds of the wreck are discussed. Until mid-March larger numbers of birds washed ashore, particularly after periods of sea-wind. Because of the abundance of Guillemots, Aucks are the best presented group, followed by Gulls, Ducks and other seabirds (Gannet, Fulmar, Great Crested Grebe <i>Podiceps cristatus</i>, Red-throated Diver <i>Gavia stellata</i>, Great Skua <i>Stercorarius skua</i>. Weakly counts of a permanent beach stretch give the best approach (n = 34) of the total number of species recorded (n=43). In species numbers, Ducks, Gulls and Waders are most important. In descending order, the Guillemot, Herring Gull, Kittiwake, Oystercatcher, Razorbill and Black-headed Gull are most abundant. The total number of beached birds along the Flemish coast in the period October 1992 -April 1993 is estimated at 1500-2000. This is 500 birds more than in the winter 1991-92. Based on the monthly counts, no significant differences between subtrajects could be demonstrated. Oil-rates were extremely low this winter (18%). High values in the period 1962-1975 were followed by a short decrease, and a new increase in the eighties. After peak-values in 1987, 1989 and 1990 oil-rates of seabirds and Guillemots decrease gradually unti11993. Why this low value has to be put into perspective, is discussed. Other mortality causes, found on the sampled birds, include entanglement in ropes and nets (Gannets!), stringing up of birds -deliberately or not -, swallowing of fishhooks (Gulls) and a variety of fractures and injuries, probably due to collisions with fast vessels or other objects and due to hunting. Finally the methods for beached bird surveys, as used this winter, are evaluated and same notes on the origin of beached birds on our beaches are made.","AbstractOtherLang":"Gedurende de winterperiode oktober 1992 -april 1993 werden via een systeem van wekelijkse tellingen op een vast deeltraject (Oostende-Nieuwpoort: 16,5 km), vijf maandelijkse tellingen over de volledige kust (65 km) en een reeks bijkomende tellingen, een totaal van 850 km strand afgezocht naar aangespoelde dode vogels. Aanvullend werden 180 vogels opgehaald in vier opvangcentra aan de kust. De eerste helft van de winter (tot eind december) werd gekenmerkt door kleine aantallen aanspoelende vogels « 1 ex./km), met oliebesmeurings-% van 3045%. Begin januari is er een eerste verhoging in de aantallen (vnl. sterfte van Steltlopers) ten gevolge van een korte, maar krachtige vorstperiode eind december. Eind januari stijgen de aantallen opnieuw tot dichtheden van 4 ex./km. Naast verhoogde aantallen Drieteenmeeuwen, betreft het voornamelijk grote aantallen, jonge en sterk vermagerde Zeekoeten, die nauwelijks (11 %) met olie zijn bevuild. De oorzaken en achtergronden van een dergelijke “auck-wreck\" worden bediscussieerd. Tot half maart spoelen nog regelmatig grotere aantallen vogels aan, vooral na periodes van aanlandige wind. Alkachtigen zijn, door de grote aantallen Zeekoeten, de belangrijkste groep, gevolgd door Meeuwen, Eendachtigen en andere zeevogels (Jan-van-Genten \" Noordse Stormvogel, Fuut <i>Podiceps cristatus</i>, Roodkeelduiker <i>Gavia stellata</i>, Grote Jager <i>Stercorarius skua</i>). Wekelijkse tellingen geven de beste benadering van het totaal aantal aangetroffen soorten (n = 34, van totaal n = 43) .Qua soortenaantal zijn de Eendachtigen, Meeuwen en Steltlopers het best vertegenwoordigd. Naar totaalaantal zijn de Zeekoet, Zilvermeeuw, Drieteenmeeuw, Scholekster, Alk en Kokmeeuw de talrijkste soorten. Naar schatting 1500-2000 vogels spoelden dood aan op onze kust in de periode oktober 1992 -april 1993. Op basis van de maandelijkse tellingen konden geen verschillen tussen de zes deeltrajecten worden gevonden. Het oliebesmeurings-% lag deze winter uitzonderlijk laag (18%). Na constant hoge waarden in de periode 1962-1975, volgde een korte verlaging, met vanaf het begin van de jaren tachtig opnieuw hogere waarden. Na pieken in 1987, 1989 en 1990 dalen de oliebesmeurings-% van zeevogels en van Zeekoeten daarna tot een minimum in 1993. Dat deze waarde echter sterk moet worden gerelativeerd wordt verder bediscussieerd. Andere doodsoorzaken van zeevogels, vastgesteld bij de verzamelde individuen, zijn verstrikking in netten en touwen (Jan-van-Genten!), al of niet moedwillige opknoping, inslikken van vishaken (meeuwen) en allerlei breuken en kwetsuren, vermoedelijk toe te schrijven aan aanvaringen met snelle vaartuigen of andere objecten en aan jachtmisdrijven. Tot slot worden de huidige telmethodes geëvalueerd en worden enige aantekeningen gemaakt bij de oorsprong van de aan de kust aanspoelende vogels.","BibLvlCode":"MS","StandardTitle":"Resultaten van stookolieslachtoffer-onderzoek langs de Vlaamse kust tijdens de winter 1992-93","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":1993,"DateUpdate":"2014-09-01","DateCreate":"2001-06-08","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":10850,"ISBN":null,"PubliDate":1993,"IssueDate":null,"Volume":"93.15","Issue":null,"Pagination":"17","Place":"Hasselt","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":45246,"SerRR":"Rapport Instituut van het Instituut voor Natuurbehoud. 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