Abstract
Predation by herring gullsLarus argentatus and oystercatchersHaematopus ostralegus was evaluated on a newly established musselMytilus edulis bed on tidal flats of the German Wadden Sea. The mussel bed covered an area of 2 ha and showed a decrease in biomass of 40% in the most densely covered parts from August to January. Synchronously, the extent of the mussel bed was reduced, resulting in a decrease of average biomass of 98% over the whole mussel bed. From the beginning of August 1994 to mid January 1995, the average size of mussels increased from 10.7 to 20.3 mm. The P/B-ratio was 0.68 in August and 0.18 between September and November. Herring gulls and oystercatchers were the most important mussel predators. On average, 266 herring gulls and 63 oystercatchers were present on the mussel bed during one low tide; 34% of the herring gulls and 78% of the oystercatchers were observed to be feeding. Herring gulls fed at a rate of 4.2 mussels per minute and oystercatchers at a rate of 1.3 mussels per minute. While herring gulls took the most common mussel sizes (mean: 20 mm), oystercatchers searched for the largest mussels available (mean: 25 mm). Herring gulls consumed 13 mussels/m2 (0.3g AFDW) during one day and oystercatchers 1.7 mussels/m2 (0.1 g AFDW). Predation by birds was compensated by 33% of the production. The proportion removed by bird predation amounted to 10% of abundance and to 16% of biomass (including production). Oystercatchers were responsible for 1% of the reduction in abundance and for 3% of biomass. Removal was highest in the most common size classes of mussels, mainly caused by herring gulls. However, the highest proportion of mussels was eaten in the largest size classes, mainly by oystercatchers. *** DIRECT SUPPORT *** A03B6035 00004
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Literature Cited
Aschoff, J. & Pohl, H., 1970. Der Ruheumsatz von Vögeln als Funktion der Tageszeit und der Körpergröße. —J. Orn.111, 38–47.
Asmus, H., 1987. Secondary production of an intertidal mussel bed community related to its storage and turnover compartments.—Mar. Ecol. Prog. Ser.39, 251–266.
Baird, D. & Milne, H., 1981. Energy flow in the Ythan estuary, Aberdeenshire, Scotland.—Estuar. coast. Shelf Sci.13, 455–472.
Brosius, G. & Brosius, F., 1995. SPSS. Base System and Professional Statistics. Thomson, Bonn, 1002 pp.
Castro, G., Myers, J. P. & Ricklefs, R. E. 1992. Ecology and energetics of sanderlings migrating to four different latitudes.—Ecology73, 833–844.
Cayford, J. & Goss-Custard, J. D., 1990. Seasonal changes in the size selection of mussels,Mytilus edulis, by oystercatchers,Haematopus ostralegus: an optimality approach.—Anim. Behav.40, 609–624.
Craeymeersch, J. A., Herman, P. M. J. & Meire, P.M., 1986. Secondary production of an intertidal mussel (Mytilus edulis L.) population in the Eastern Scheldt (SW-Netherlands)—Hydrobiologia133 107–115.
Cramp, S. & Simmons, K. E. L., 1977. Handbook of the birds of Europe and the Middle East. Oxford Univ. Press, Oxford,1, 17–35.
Dare, P. J., 1976. Settlement, growth and production of the mussel,Mytilus edulis L. in Morecambe Bay, England.—Fishery Invest., Lond. (Ser. 2)28 (1), 1–25.
Dernedde, E. T., 1993. Vergleichende Untersuchungen zur Nahrungszusammensetzung von Silbermöwe (Larus argentatus), Sturmmöwe (L. canus) und Lachmöwe (L. ridibundus) im Königshafen/Sylt.— Corax15, 222–240.
Drent, R., Ebbinge, B. & Weijand, B., 1978. Balancing the energy budgets of arctic-breeding geese throughout the annual cycle: a progress report.—Verh. orn. Ges. Bayern23, 239–263.
Drinnan, R. E., 1958. The winter feeding of the oystercatcher (Haematopus ostralegus) on the edible mussel (Mytilus edulis) in the Conway Estuary, North Wales.—Fishery Invest., Lond. (Ser. 2)22, 1–15.
Durell, S. E. A. & Goss-Custard, J. D., 1984. Prey selection within a size-class of mussels,Mytilus edulis, by oystercatchers,Haematopus ostralegus.—Anim. Behav.32, 1197–1203.
Egerrup, M. & Hoegh Laursen, M. L., 1992. Aspects of predation on intertidal blue mussels (Mytilus edulis L.) in the Danish Wadden Sea.—C. M./ICESK 25, 1–20.
Ehlert, W., 1961. Weitere Untersuchungen über die Nahrungswelt der Silbermöwe (Larus argentatus) auf Mellum.—Vogelwarte21, 48–50.
Ens, B., 1982. Size selection in mussel-feeding oystercatchers.—Wader Study Group Bull.34, 16–20.
Exo, K.-M. & Scheiffarth, G., 1994. The day- and nighttime activity of oystercatchers breeding in the Wadden Sea.—J. Orn.135, (Sonderh.), 146.
Faldborg, K., Jensen, K. T. & Maargaard, L., 1994. Dynamics, growth, secondary production and elimination by waterfowl of an intertidal population ofMytilus edulis L.—Ophelia (Suppl.)6, 187–200.
Flemming, B. W., & Delafontaine, M. T., 1994. Biodeposition in a juvenile mussel bed of the East Frisian Wadden Sea (southern North Sea).—Neth. J. aquat. Ecol.,28, 289–297.
Goede, A. A., 1993. Variation in the energy intake of captive oystercatchersHaematopus ostralegus.—Ardea81, 89–97.
Goethe, F., 1961. Zur Taxonomie der Silbermöwe im südlichen deutschen Nordseegebiet.—Vogelwarte21, 1–24.
Gosling, E. (Ed.), 1992. The musselMytilus: ecology, physiology, genetics and culture. Elsevier, Amsterdam, 589 pp.
Goss-Custard, J. D., Durell, S. E. A., McGrorty, S. & Reading, C. J., 1982. Use of musselMytilus edulis beds by oystercatchersHaematopus ostralegus according to age and population size.—J. Anim. Ecol.51, 543–554.
Goss-Custard, J. D., West, A. D. & Durell S. E. A., 1993. The availability and quality of the mussel prey (Mytilus edulis) of oystercatchers (Haematopus ostralegus).—Neth. J. Sea Res.31, 419–439.
Hartwig, E. & Söhl, M., 1979. Zur Nahrung der Silbermöwe (Larus argentatus) auf der Nordseeinsel Sylt. II Jahreszeitliche Änderungen in der Zusammensetzung der Nahrung.—Abh. Geb. Vogelkde,6, 67–86.
Hilgerloh, G., 1996. Miesmuscheln (Mytilus edulis) in der Nahrung von Eiderenten (Somateria mollissima) auf den Nordseeinseln Langeoog und Spiekeroog.—Acta ornithoecol.3(3), 239–243.
Hilgerloh, G., 1997. Predation by birds on blue musselMytilus edulis beds of the tidal flats of Spiekeroog (southern North Sea).—Mar. Ecol. Prog. Ser.146, 61–72.
Hilgerloh, G. & Herlyn, M., 1996. Auswirkungen der Prädation durch Vögel auf eine junge Miesmuschelbank (Mytilus edulis).—Verh. dt. zool. Ges.84, 306.
Hulscher, J. B., 1974. An experimental study of the food intake of the oystercatcherHaematopus ostralegus L. in captivity during the summer.—Ardea,62, 155–171.
Hulscher, J. B., 1976. Localisation of cockles (Cardium edule L.) by the oystercatcher (Haematopus ostralegus L.) in darkness and daylight.—Ardea,64, 292–310.
Hüppop, O., 1987. Der Einfluß von Wachstum, Thermoregulation und Verhalten auf den Energiehaushalt der Silbermöwe (Larus argentatus Pontoppidan, 1763). Diss. Univ. Hamburg, 207 pp.
Jansson, B. O. & Wulff, F., 1977. Ecosystem analysis of a shallow sound in the northern Baltic—joint study by the Askö group.—Contr. Askö Lab.18, 1–60.
Kautsky, N. 1981. On the trophic role of the blue mussel (Mytilus edulis L.) in a Baltic coastal ecosystem and the fate of the organic matter produced by the mussels.—Kieler Meeresforsch. (Sonderh.)5, 454–461.
Kersten, M. & Piersma, T., 1987. High levels of energy expenditure in shorebirds; metabolic adaptations to an energetically expensive way of life.—Ardea75, 175–187.
Lasiewski, R. C. & Dawson, W. R., 1967. A re-examination of the relation between standard metabolic rate and body weight in birds.—Condor69, 13–23.
Martin, P. & Bateson, P., 1986. Measuring behaviour.—Cambridge Univ. Press, Cambridge, 1200 pp.
Meijering, M. P. D., 1954. Zur Frage der Variation in der Ernährung der Silbermöwe,Larus argentatus Pont.—Ardea42, 163–175.
Meire, P. & Ervynck, A., 1986. Are oystercatchers (Haematopus ostralegus) selecting the most profitable mussels (Mytilus edulis)?.—Anim. Behav.34, 1427–1435.
Meire, P. M., Schekkerman, H. & Meininger, P. L., 1994. Consumption of benthic invertebrates by waterbirds in the Oosterschelde estuary, SW Netherlands.—Hydrobiologia282/283, 525–546.
Michaelis, H., Obert, B., Schultenkötter, I. & Böcker, L., 1995. Die Miesmuschelbestände der niedersächsischen Watten 1989–1991.—Ber. NLÖ-Forschungsst. Küste40, 1–71.
Milne, H. & Dunnet, G. M., 1972. Standing crop, productivity and trophic relations of the fauna of the Ythan Estuary. In: The estuarine environment. Ed. by R. S. K. Barnes & J. Green. Applied Science Publ., London, 86–106.
Nehls, G., 1989. Occurrence and food consumption of the common eider,Somateria mollissima, in the Wadden Sea of Schleswig-Holstein.—Helgoländer Meeresunters.43, 385–393.
Nehls, G., Hertzler, I. & Scheiffarth, G., 1995. Nutzung von Miesmuschelbänken durch Vögel. In: Trophischer und regulierender Stellenwert der Vögel im Ökosystem Wattenmeer. (Sylter Wattenmeer Austauschprozesse; Abschlußber.) Hrsg. von G. Nehls, G. Scheiffarth & R. Tiedemann. Forschungs- und Technologiezentrum Westküste, Büsum, 138–153.
Raffaelli, D., Falcy, C. & Galbraith, C., 1990. Eider predation and the dynamics of mussel bed communities. In: Trophic relations in the marine environment. Ed. by S. M. Varne & R. N. Gibson. Aberdeen Univ. Press, Aberdeen, 157–169.
Scheiffarth, G. & Nehls, G., 1997. Consumption of benthic fauna by carnivorous birds in the Wadden Sea.—Helgoländer Meeresunters.51, (in press.).
Spaans, A. L., 1971. On the feeding ecology of the herring gullLarus argentatus Pont. in the northern part of the Netherlands.—Ardea5, 73–185.
Speakman, J., 1990. Bias in the collection of mussel shells opened by oystercatchers.—Wader Study Group Bull.58, 48–49.
Sutherland, W. & Ens, B., 1987. The criteria determining the selection of musselsMytilus edulis by oystercatchersHaematopus ostralegus.—Behaviour103, 187–202.
Svane, I. & Ompi, M., 1991. Patch dynamics in beds of the blue musselMytilus edulis L.: Effects of site, patch size, and position within a patch.—Ophelia37, 187–202.
Swennen, C. G., Nehls, G. & Laursen, K., 1989. Numbers and distribution of eidersSomateria mollisima in the Wadden Sea.—Neth. J. Sea Res.24, 83–92.
Wanink, J. H. & Zwarts, L., 1993. Environmental effects on the growth rate of intertidal invertebrates and some implications for foraging waders.—Neth. J. Sea Res.3, 407–418.
Winberg, G. G. (Ed.) 1971. Methods for estimation of production of aquatic animals. Acad. Press, London, 175 pp.
Worral, C. M. & Widdows, J., 1984. Investigation, of factors influencing mortality inMytilus edulis L. —Mar. Biol. Lett.5, 85–97.
Zwarts, L. & Blomert, A. M., 1992. Why knotCalidris canutus take medium sizedMacoma balthica when six prey species are available.—Mar. Ecol. Prog. Ser.83, 113–128.
Zwarts, L. & Drent, R. H., 1981. Prey depletion and the regulation of predator density: oystercatchers,Haematopus ostralegus, feeding on musselsMytilus edulis. In: Feeding and survival strategies of estuarine organisms. Ed. by P. Jones, & W. J. Wolff. Plenum Press, New York, 193–216.
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Hilgerloh, G., Herlyn, M. & Michaelis, H. The influence of predation by herring gullsLarus argentatus and oystercatchersHaematopus ostralegus on a newly established musselMytilus edulis bed in autumn and winter. Helgoländer Meeresunters. 51, 173–189 (1997). https://doi.org/10.1007/BF02908706
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DOI: https://doi.org/10.1007/BF02908706