Literature
- Aarefjord H., Bjørge A., Kinze C.C. and Lindstedt I. 1995. Diet of the Harbour Porpoise, Phocoena phocoena, in Scandinavian waters. Rep. Int. Whal. Commn (Special issue 16): 211-222.
- Anker-Nilssen T. 1987. The breeding performance of Puffins Fratercula arctica on Røst, northern Norway in 1979-1985. Fauna norv. Ser. C, Cinclus 10: 21-38.
- Barrett R.T., Røv N., Loen J. and Montevecchi W.A. 1990. Diets of Shags Phalacrocorax aristotelis and cormorants P. carbo in Norway and possible implications for gadoid stock recruitment. Mar. Ecol. Prog. Ser. 66: 205-218.
- Behrends G. 1982. Analysis of stomach- and colon contents of 185 common seals from the Waddensea of Schleswig-Holstein. ICES, C.M. N:11.
- Benke H., Siebert U., Lick R., Bandomir B. and Weiss R. 1998. The current status of Harbour Porpoises (Phocoena phocoena) in German waters. Archive of Fishery and Marine Research 46: 97-123.
- Bjørge A. 1995. Comparative habitat use and foraging behaviour of harbour seals and grey seals in western Norway. ICES C.M.
- Bjørge A., Olsen M. and Prime J. 1993. Food and foraging of the Harbour Seal, Phoca vitulina L., in Norwegian waters. Ch. V in: A. Bjørge (.
- Boudewijn T.J. and Dirksen S. 1993. Monitoring van biologische effecten van verontreiniging op het broedsucces in 1992 van Aalscholvers in de Dordtse Biesbosch en op de Ventjagersplaten en de relatie voedselkeuze-broedsucces. Rapport RWS, Directie Zuid-Holland 93.16, Bureau Waardenburg, Culemborg, 43p.
- Boudewijn T.J. and Dirksen S. 1998. Monitoring van biologische effecten van verontreiniging op het broedsucces van Aalscholvers in de Dordtse Biesbosch en op de Ventjagersplaten in.
- Boudewijn T.J., Dirksen S. and van der Winden J. 1994. De voedselkeuze van Aalscholvers in de Grevelingen in het seizoen 1993-.
- Brown E.G. and Pierce G.J. 1997. Diet of harbour seals at Mousa, Shetland, during the third quarter of 1994. J. Mar. Biol. Ass. U.K. 77: 539-555.
- Buckens M. and Raeijmaekers M. 1992. Voedselkeuze Aalscholver in de Grevelingen. Internal Report, DGW Middelburg, 60 pp.
- Camphuysen C.J. 1994. Flatfish selection by Herring Gulls Larus argentatus and Lesser Black-backed Gulls Larus fuscus scavenging at commercial beamtrawlers in the southern North Sea. Neth. J. Sea Res. 32: 91-98.
- Carss D.N. and Marquiss M. 1996. The influence of a fish farm on grey heron Ardea cinerea breeding performance. In: Greenstreet S.P.R. and Tasker M.L. (eds). Aquatic predators and their prey: 133-141. Fishing News Books, University Press, Cambridge.
- Des Clers S. and Prime J. 1996. Seals and fishery interactions: observations and models in the Firth of Clyde, Scotland. In: Greenstreet S.P.R. and Tasker M.L. (Eds.) Aquatic Predators and Their Prey. Blackwell Scientific Publications, Oxford. 58-64.
- Durinck J., Skov H., Danielsen F. and Christensen K.D. 1994. Vinterføden hos Røkstrubet Lom Gavia stellata i Skagerrak [Winter food of Red-throated Divers Gavia stellata from the North Sea coast of Jutland]. Dansk Orn. Foren. Tidsskr. 88: 39-41.
- Fox A.D. 1994. Estuarine winter feeding patterns of Little Grebes Tachybaptus ruficollis in central Wales. Bird Study 41: 15-24.
- Frank D. 1992. The influence of feeding conditions on food provisioning of chicks in Common Terns Sterna hirundo nesting in the German Wadden Sea. In: Spaans A.L. (ed.). Population dynamics of Lari in relation to food resources. Ardea 80: 45-55.
- Garthe S., Camphuysen C.J. and Furness R.W. 1996. Amounts of discards by commercial fishereries and their significance as food for seabirds in the North Sea. Mar. Ecol. Prog. Ser. 136: 1-11.
- Garthe S., Kubetzki U., Hüppop O. and Freyer T. 1999. Zur Ernährungsökologie von Herings-, Silber- und Sturmmöwe (Larus fuscus, L. argentatus und L. canus) auf der Nordseeinsel Amrum während der Brutzeit. Seevögel 20: 52-58.
- Gates D.A. 1998. Black Guillemots chick feeding on Papa Westray, Orkney. Sea Swallow 47: 61-63.
- Hall A.J., Watkins J. and Hammond P.S. 1998. Seasonal variation in the diet of harbour seals in the south-western North Sea. Mar. Ecol. Prog. Ser. 170: 269-281.
- Hammond P.S. and Prime J.H. 1990. The Diet of British Grey Seals (Halichoerus grypus). In: Bowen W.D. (ed.) Population biology of Sealworm (Pseudoterranova decipiens) in relation to its intermediate and seal hosts. Can. Bull. Fish. Aquat. Sci. 222: 243-254.
- Hartwig E. Stühmer F. and Clemens T. 1990. Zur Ernährungsökologie der Küstenseeschwalbe (Sterna paradisaea) auf Scharhörn. Seevögel 11: 53-59.
- Havinga B. 1933. Der Seehund (Phoca vitulina L.) in den Holländischen Gewässern. Tijdschr. Ned. Dierk. Ver. 79: 79-111.
- Heggberget T.M. 1993. Marine feeding Otters (Lutra lutra) in Norway: seasonal variation in prey and reproductive timing. J. Mar. Biol. Ass. UK 73: 297-312.
- Härkönen T. 1987. Seasonal and regional variations in feeding habits of the harbour seal, Phoca vitulina, in the Skagerrak and the Kattegat. J. Zool. , Lond. 213: 1-9.
- Härkönen T. and Heide-Jørgensen M.-P. 1991. The Harbour Seal Phoca vitulina as a predator in the Skagerrak. Ophelia 34: 193-207.
- Härkönen T.J. 1988. Food-habitat relationship of Harbour Seals and Black Cormorants in the Skagerrak and Kattegat. J. Zool., Lond. 214: 673-681.
- Kieckbusch J.J 1993. Beobachtungen zur Nahrungswahl des Kormorans (Phalacrocorax carbo sinensis) in der Umgebung des Naturschutzgebietes "Oehe-Schleimunde". Seevögel 14(2):19-22.
- Krause J. 1999. Analyse der Nahrungsreste im Verdauungstract von Phoca vitulina in Relation ze den tatschlich verfügbaren Nahrungsressourcen. MsC-thesis, Mathematisch- Naturwissenschaftliche Fakultät der Christian-Albrechts-Universität Kiel, 67p.
- Kruuk H., Conroy J.W.H. and Moorhouse A. 1987. Seasonal reproduction, mortality and food of otters (Lutra lutra L.) in Shetland. Symp. Zool. Soc. London 58: 263-278.
- Kubetzki U. 1997. Ernährungsökologie von Sturmmöwen (Larus canus L., 1758) vershiedener Kolonien an der deutschen Nordseeküste. Msc thesis Institut fur Angewandte Zoologie der Reinischen Friedrich-Wilhelms-Universita/t, Bonn, 87pp.
- Kubetzki U., Garthe S. and Hüppop O. 1999. The diet of common gulls Larus canus breeding on the German North Sea coast. Atlantic Seabirds 1: 57-70.
- Leopold M.F. and Van Damme C.J.G., in prep. Cormorants and polychaetes: can worms be a main prey of a piscivorous seabird?. Marine Ornithology manuscript. .
- Leopold M.F., Van Damme C.J.G. and Van der Veer H.W. 1998. Diet of cormorants and the impact of cormorant predation on juvenile flatfish in the Dutch Wadden Sea. J. Sea Res. 40: 93-107.
- Lindstrøm U., Harbitz A., Haug T. and Nilssen K.T. 1996. Do harp seals Phoca groenlandica exhibit particular prey preferences?. ICES C.M.
- Löhmer K. and Vauk G. 1970. Ein weiterer Beitrag zur Ernährung Helgoländer Silbermöwen (Larus argentatus). Vogelwarte 25: 242-245.
- Madsen F.J. 1957. On the food habits of some fish-eating birds in Denmark. Dan. Rev. Game Biol. 3:19-83.
- Martin A.R. 1989. The diet of Atlantic Puffin Fratercula arctica and Northern Gannet Sula bassana chicks at a Shetland colony during a period of changing prey availability. Bird Study 36: 170-180.
- Mills D., 1969. The food of the Cormorant at two breeding colonies on the east coast of Scotland. Scot. Birds 5: 268-276. .
- Nehls G. and Gienapp P. 1997. Nahrungswahl und Jagdverhalten des Kormorans Phalacrocorax carbo im Wattenmeer. Vogelwelt 118: 33-40.
- Nilssen K.T., Grotnes P.E. and Haug T. 1990. The effect of invading harp seals (Phoca groenlandica) on local coastal fish stocks of north Norway. ICES C.M.
- Nilssen K.T., Haug T., Potelov V., Stasenkov V. and Timoshenko Y.K. 1995. Food habits of harp seals (Phoca groenlandica) during lactation and moult in March-May in the southern Barents Sea and White Sea. ICES J. mar. Sci. 52: 33-41.
- Okill J.D., Fowler J.A., Ellis P.M. and Petrie G.W. 1992. The diet of Cormorant Phalacrocorax carbo chicks in Shetland in 1989. Seabird 14: 21-26.
- Paillard C. 1985. Mise au point d'une mthode d'tude de l'alimentation des oiseaux de mer: cas du Grand Cormoran (Phalacrocorax carbo). Travaux des Rserves. Soc. pour l'Etude et la Protection de la Nature en Bretagne 4: 51-85.
- Pearson T.H. 1968. The feeding biology of sea-bird species breeding on the Farne Islands, Northumberland. J. Anim. Ecol. 37:521-552.
- Pierce G.J. Diack J.S.W. and Boyle P.R. 1989. Digestive tract contents of seals in the Moray Firth area of Scotland. J. Fish Biol. 35(suppl. A):341-343.
- Pierce G.J., Boyle P.R. and Diack J.S.W., 1991. Digestive track contents of seals in Scottish waters: comparison of samples from salmon nets and elsewhere. J. Zool., Lond. 225: 670-676. .
- Prime J.H. and Hammond P.S. 1987. Quantitative assessment of gray seal diet from fecal analysis. A.C. Huntley, D.P. Costa, G.A.J. Worthy and M.A. Castellini (Eds): Approaches to Marine Mammal Energetics. Soc. for Marine Mammalogy Special Publ. No. 1: 165-181.
- Prime J.H. and Hammond P.S. 1990. The diet of grey seals from the south-western North Sea assessed from analyses of hard parts found in faeces. J. Appl. Ecol. 27: 435-447.
- Rae B.B. 1965. The food of the common porpoise (Phocaena phocaena). J. Zool., Lond. 146: 114-122.
- Rae B.B., 1973. Further observations on the food of seals in Scottish waters. J. Zool., Lond. 169: 287-297. .
- Reinhold A.-B. 1996. Nahrungsökologie des Kormorans (Phalacrocorax carbo) auf Helgoland. Msc thesis Humbolt University, Berlin and Vogelwarte Helgoland, Helgoland, 72p.
- Sievers U. 1989. Nahrungsokologische Untersuchungen an Seehunden (Phoca vitulina, Linne 1758) aus dem schleswig-holsteinischen Wattenmeer. Zool. Anz. 222: 249-260.
- Steven G.A. 1933. The food consumed by Shags and Cormorants around the shores of Cornwall (England). J. Mar. Biol. Ass. U.K. 19: 277-292.
- Stienen E.W.M and Brenninkmeijer A. 1992. Ecologisch profiel van de Visdief (Sterna hirundo). Rin-rapport 92/18: 128 pp.
- Thompson P.M., Tollit D.J., Greenstreet S.P.R., Mackay A. and Corpe H.M. 1996. Between-year variations in the diet and behaviour of harbour seals Phoca vitulina in the Moray Firth; causes and consequences. In: Greenstreet S.P.R. and Tasker M.L. (Eds.) Aquatic Predators and Their Prey. Blackwell Scientific Publications, Oxford. 44-52.
- Tollit D.J. and Thompson P.M. 1996. Seasonal and between-year variations in the diet of harbour seals in the Moray Firth, Scotland. Can. J. Zool. 74: 1110-1121.
- Van Damme C. 1994. Poep en kots: dieetstudies van Zeehonden en Aalscholvers. Ongepubl. rapport, NIOZ, Texel, 32pp, bijlagen I-XLIII.
- Van Damme C.J.G., Leopold M.F. and Knecht S., 1999. Diet, prey preferences and feeding habitat of harbour seals at Helgoland, southeastern North Sea. Mar. Ecol. Prog. Ser. .
- Warke G.M.A. and Day K.R. 1995. Changes in abundance of cyprinid and percid prey affect rate of predation by cormorants Phalacrocorax carbo carbo on salmon Salmo salar smolt in Northern Ireland. Ardea 83(1):157-166.
- Watson H. 1978. Coastal Otters in Shetland. The Vincent Wildlife Trust, London.
- Wendeln H., Mickstein S. and Becker P. 1994. Auswirkungen individueller Ernährungstrategien von Flußseeschwalben (Sterna hirundo) auf die Anwesenheit am Koloniestandort. Die Vogelwarte 37: 290-303.