Research Projects Hemiclonal waterfrogs Hemiklonale Wasserfrösche Hoffmann A, Abt Tietje G & Reyer H-U (2015): Spatial behavior in relation to mating systems: movement patterns, nearest neighbour distances, and mating success in diploid and polyploid frog hybrids (Pelophylax esculentus) Behav. Ecol. Sociobiol. 69: 501-517. Hoffmann A, Plötner J, Pruvost NBM, Christiansen DG, Röthlisberger S, Choleva L, Mikulíček P, Cogălniceanu D, Sas- Kovács I,  Shabanov D, Morozov-Leonov S & Reyer H-U (2015): Genetic diversity and distribution patterns of diploid and polyploid hybrid water frog populations (Pelophylax esculentus complex) across Europe. Mol. Ecol. 24: 4371-4391. Pruvost NBM, Mikulicek O, Choleva L & Reyer H-U (2015): Contrasting reproductive strategies of triploid hybrid males in vertebrate mating systems. J. Evol. Biol. 28: 189-204. Reyer H-U, Arioli-Jakob C & Arioli M (2015): Post-zygotic selection against parental genotypes during larval development maintains all-hybrid populations of the frog Pelophylax esculentus. BMC Evol. Biol. 15: 131. Hoffmann A & Reyer H-U (2013): Genomic effects on advertisement call structure in diploid and triploid hybrid water frogs (Anura, Pelophylax esculentus). BMC Ecology 13: 47. Pruvost NBM, Hoffmann A & Reyer H-U (2013): Gamete production patters, ploidy, and population genetics reveal evolutionary significant units in hybrid water frogs (Pelophylax esculentus). Ecol. Evol. 3:2933-2946. Pruvost NBM, Hollinger, D & Reyer H-U (2013): Genotype-temperature interactions on larval performance shape population structure in hybridogenetic water frogs (Pelophylax esculentus complex). Funct. Ecol. 27: 459-471. Stöhr AC, Hoffmann A, Papp T, Robert N, Pruvost NBM, Reyer H-U & Marschang RE (2013): Long-term study of an infection with ranaviruses in a group of edible frogs (Pelophylax kl. esculentus) and partial characterization of two viruses based on four genomic regions. Vet. J. 197: 238-244.. Embrechts E & Reyer H-U (2012): Age and size of hybrid water frogs: The role of genotype and ecology. Herpetologica 68: 468- 481. Christiansen D & Reyer H-U (2011): Effects of geographic distance, sea bariers and habitat on the genetic structure and diversity of all-hybrid water frog populations. Heredity 106: 25-36. Arioli M, Jakob C & Reyer H-U (2010): Genetic diversity in water frog hybrids (Pelophylax esculentus) varies with population structure and geographic location. Mol. Ecol. 19: 1814–1828. Christiansen DG, Jakob C, Arioli M, Roethlisberger S. & Reyer H-U (2010): Coexistence of diploid and triploid hybrid water frogs: population differences persist in the apparent absence of differential survival. BMC Ecology 10: 14. Jakob C, Arioli M & Reyer H-U (2010): Ploidy composition in all-hybrid frog populations in relation to ecological conditions. Evol. Ecol. Res. 12: 633-652. Plötner J, Uzzell T, Beerli P, Cigdem A, Bilgin CC, Haefeli C, Ohst T, Köhler F, Schreiber R, Guex G-D, Litvinchuk SN, Westaway R, Reyer H-U, Pruvost N & Hotz H (2010): Genetic divergence and evolution of reproductive isolation in eastern Mediterranean water frogs. In: Glaubrecht (ed.): Evolution in Action, pp. 373-403. Springer, Heidelberg. Christiansen, DG, Reyer, HU (2009): From clonal to sexual hybrids: genetic recombination via triploids in all-hybrid populations of water frogs. Evolution 63: 1754-1768. Vorburger C, Schmeller DS, Hotz H, Guex G-D & Reyer H-U (2009): Masked damage:  mutational load in hemiclonal water frogs. In: Van Dijk P., Martens K., Schoen I. (eds):  Lost Sex -- The Evolutionary Biology of Parthenogenesis; pp. 433-446. Springer Press, Berlin. Plötner J, Beerli P, Uzzell T, Spolsky C, Ohst T, Litvinchuk SN, Guex G-D, Reyer H-U & Hotz H (2008): Widespread unidirectional transfer of mitochondrial DNA: a case in western Palearctic water frogs. J. Evol. Biol. 21: 668-681. Reyer, HU (2008): Mating with the wrong species can be right. Trends Ecol. Evol. 23: 289-292. Som C, Bagheri HC & Reyer H-U (2007): Mutation accumulation and fitness effects in hybridogenetic populations: a comparison to sexual and asexual systems. BMC Evol. Biol. 7: 80. Waelti MO & Reyer H-U (2007): Food supply modifies the trade-off between past and future reproduction in a sexual parasite-host system (Rana esculenta, R. lessonae). Oecologia 152: 415-424. Som C & Reyer H-U (2007): Hemiclonal reproduction slows down the speed of Muller's ratchet in the hybridogenetic frog, Rana esculenta. J. Evol. Biol. 20: 650-660. Som C & Reyer H-U (2006a): Variation in sex ratio and evolutionary rate of hemiclonal Rana esculenta populations. Evol. Ecol. 20: 159-172. Som C & Reyer H-U (2006b): Demography and evolution of pure diploid-triploid waterfrog (Rana esculenta) populations. Evol. Ecol. Res. 8: 1235-1248. Abt Tietje G & Reyer H-U (2004): Larval development and recruitment of juveniles in a natural population of Rana lessonae and Rana esculenta. Copeia 3: 638-646. Reyer H-U & Bättig I (2004): Identification of reproductive status in female frogs – A quantitative comparison of nine methods. Herpetologica 60: 349-357. Reyer H-U, Wälti MO, Bättig I, Altwegg R & Hellriegel B (2004): Low proportions of reproducing hemiclonal females increase the stability of a sexual parasite-host system (Rana esculenta, Rana lessonae). J. Anim. Ecol. 73: 1089-1101. Reyer H-U, Niederer B & Hettyey A. (2003): Variation in fertilisation abilities between hemiclonal hybrid and sexual parental males of sympatric water frogs (Rana lessonae, R. esculenta, R. ridibunda). Behav. Ecol. Sociolbiol. 54: 274-284. Altwegg R & Reyer H-U (2003): Patterns of natural selection on size at metamorphosis in waterfrogs. Evolution 57: 872-882. Vorburger C & Reyer H-U (2003): A genetic mechanism of species replacement in European waterfrogs?. Conserv. Gen. 4: 141- 155. Holenweg Peter A-K, Reyer H-U & Abt Tietje G (2002): Species and sex ratio differences in mixed populations of hybridogenetic waterfrogs: the influence of pond features. Ecoscience 9: 1-11. Holenweg Peter A-K, Reyer H-U & Abt Tietje G (2001): Homing behavior of Rana lessonae, R. ridibunda and their hybridogenetic associate R. esculenta after experimental displacement. Amphibia-Reptilia 22: 475-480. Engeler B & Reyer H-U (2001): Choosy females and indifferent males: mate choice in mixed populations of the water frogs Rana lessonae and Rana esculenta. Behav. Ecol. 12: 600-606. Negovetic S, Anholt BA, Semlitsch RD & Reyer H-U (2001): Specific responses of sexual and hybridogenetic European waterfrog tadpoles to temperature. Ecology 82: 766-774. Thurnheer S & Reyer H-U (2001): Spatial distribution and survival rate of waterfrog tadpoles in relation to biotic and abiotic factors. a field experiment. Amphibia-Reptilia 22: 21-32. Garner TWJ, Gautschi B, Röthlisberger S & Reyer H-U (2000): A set of CA repeat micro-satellite markers derived from the pool frog, Rana lessonae. Mol. Ecol. 9: 2173-2175. Hellriegel B & Reyer H-U (2000): Factors influencing the composition of mixed populations of a hemiclonal hybrid and its sexual host. J. Evol. Biol. 13: 906-918. Holenweg A-K & Reyer H-U (2000): Hibernating behavior of Rana lessonae and R. esculenta in their natural habitat. Oecologia 123: 41-47.   Roesli M & Reyer H-U (2000): Male vocalisation and female choice in the hybridogenetic Rana lessonae/R. esculenta complex. Anim. Behav. 60: 745-755. Som C, Anholt BR & Reyer H-U (2000): The effect of assortative mating on the coexistence of a hybridogenetic waterfrog and its sexual host. Am. Nat. 156: 34-46. Reyer H-U, Frei G & Som C (1999): Cryptic female choice: frogs reduce clutch size when amplexed by undesired males. Proc. R. Soc. Lond. B 266: 2101-2107. Bergen K, Semlitsch RD & Reyer H-U (1997): Hybrid female matings are directly related to the availability of Rana lessonae and Rana esculenta males in experimental populations. Copeia 1997: 275-283. Fioramonti E, Semlitsch RD, Reyer H-U & Fent K (1997): Effects of tri-phenyltin and pH on the growth and development of t adpoles of Rana lessonae and Rana esculenta. Environm. Toxicol. Chem. 16: 1940-1947. Rist L, Semlitsch RD, Hotz H & Reyer H-U (1997): Feeding behaviour, food consumption, and growth efficiency of tadpoles of the Rana esculenta complex. Funct. Ecol. 11: 735-742. Holenweg AK & Reyer H-U (1996): Migration and homing in the hybridogenetic water frog complex (Rana lessonae, R. ridibunda             and R. esculenta). Proceedings of the 5th European Wildlife Telemetry Conference, Strassburg. Abt G & Reyer H-U (1993): Mate choice and fitness in a hybrid frog: Rana esculenta females prefer Rana lessonae males over their own. Behav. Ecol. Sociobiol. 32: 221-228. Semlitsch RD & Reyer H-U (1992a): Modification of anti-predator behaviour in tadpoles by environmental conditioning. J. Anim. Ecol. 61: 353-360. Semlitsch RD & Reyer H-U (1992b): Performance of tadpoles from the hybrido-genetic Rana esculenta complex: Interactions with pond drying and interspecific competition. Evolution 46: 665-676. Avian mating systems Paarungssysteme bei Vögeln Rauter C, Reyer H-U & Bollmann K (2002): Selection through predation, snowfall, and micro-climate on nest-site preference in the water pipit Anthus spinoletta. Ibis 144: 433-444. Bollmann K & Reyer H-U (2001): Reproductive success of water pipits in an alpine environment. Condor 103: 510-520. Pasinelli G, Hegelbach J & Reyer H-U (2001): Spacing behavior of the middle spottet woodpecker in Central Europe. J. Wildlife Manage. 65: 432-441. Rauter C, Brodmann PA & Reyer H-U (2000): Provisioning behaviour in relation to food availability and nestling food demand in the alpine water pipit (Anthus spinoletta). Ardea 88: 81-90. Rauter C & Reyer H-U (2000): Thermal and energetic consequences of habitat selection in breeding water pipits (Anthus spinoletta). J. Ornithol. 141: 391-407. Bollmann K & Reyer H-U (1999): Why does monogamy prevail in the alpine water pipit (Anthus spinoletta)? In: Adams, J. & Slotow, R.H. (eds.). Proc. 22 Int. Ornithol. Congr., Durban: 2666-2688. Johannesburg: BirdLife South Africa. Brodmann PA & Reyer H-U (1999): Nestling provisioning in water pipits (Anthus spinoletta): do parents go for specific nutrients or profitable prey? Oecologia 120: 506-514. Rehsteiner U, Geisser H & Reyer H-U (1998): Singing and mating success in water pipits: one specific song song element makes all the difference. Anim. Behav. 55: 1471-1481. Reyer H-U, Fischer W, Steck P, Nabulon T & Kessler P (1998): Sex-specific nest defense in house sparrows (Passer domesticus) varies with badge size of males. Behav. Ecol. Sociobiol. 42: 93-99. Bollmann K, Reyer H-U & Brodmann PA (1997): Territory quality and reproductive success: can alpine water pipits Anthus spinoletta assess the relationship reliably? Ardea 85: 83-98. Brodmann PA, Reyer H-U & Baer B (1997): The relative importance of habitat structure and prey characteristics for the foraging success of water pipits (Anthus spinoletta). Ethology 103: 222-235. Brodmann PA, Reyer H-U, Bollmann K, Schläpfer A & Rauter C (1997): The importance of food quantity and quality for reproductive performance in alpine water pipits (Anthus spinoletta). Oecologia 109: 200-208. Rauter C & Reyer H-U (1997): Incubation pattern and foraging effort of female water pipits (Anthus spinoletta). Ibis 139: 441-446. Reyer H-U, Bollmann K, Schläpfer AR, Schymainda A & Klecack G (1997): Ecological determinants of extra-pair copulations and egg dumping in alpine water pipits (Anthus spinoletta). Behav. Ecol. 8: 534-543. Frey-Roos F, Brodmann PA & Reyer H-U (1995): Relationships between food resources, foraging patterns and reproductive success in the water pipit. Behav. Ecol. 6: 287-295. Reyer H-U (1994a): Ecology and evolution of mating systems. Verh. Dtsch Zool. Ges. 1994 87: 97-113. Cooperative breeding in birds Kooperative Jungenaufzucht bei Vögeln Reyer H-U (1993a): Kooperative Jungenaufzucht bei Vögeln. Praxis der Naturwissenschaften-Biologie 6/42: 23-26. Reyer H-U (1990a): The Pied Kingfisher: Ecological causes and reproductive consequences of cooperative breeding. In: Cooperative breeding in birds: long-term studies of ecology and behavior (P. Stacey & W. Koenig, eds.), pp.529-557. Cambridge: Cambridge University Press. Reyer H-U (1990b): Die Evolution von kooperativer Jungenaufzucht. In: Evolutionsprozesse im Tierreich (B. Streit, ed.), pp.125- 141. Basel: Birkhäuser Verlag. Reyer H-U (1988): Ökologie und Evolution kooperativer Jungenaufzucht bei Vögeln. Verh. Dtsch. Zool. Ges. 81:169-182. Reyer H-U, Migongo-Bake W & Schmidt L (1988): Field studies and experiments on distribution and foraging of pied and malachite kingfishers at Lake Nakuru (Kenya). J. Anim. Ecol. 57: 595-610. Reyer H-U (1986): Breeder-helper-interactions in the pied kingfisher (Ceryle rudis) reflect the costs and benefits of cooperative breeding. Behaviour 96: 277-303. Reyer H-U, Dittami JP & Hall MR (1986): Avian helpers at the nest: Are they psychologically castrated? Ethology 71: 216- 228. Reyer H-U (1985): Brutpflegehelfer beim Graufischer. In: D. Franck (ed) Verhaltensbiologie, 2. ed., (pp. 277-282). Stuttgart: G. Thieme Verlag. Reyer H-U & Westerterp K (1985): Parental energy expenditure: a proximate cause of helper recruitment in the pied kingfisher (Ceryle rudis). Behav. Ecol. Sociobiol. 17: 363-369. Reyer H-U (1984a): Investment and relatedness: a cost/benefit analysis of breeding and helping in the pied kingfisher (Ceryle rudis). Anim. Behav. 32: 1163-1178. Reyer H-U (1984b): The adaptive significance of cooperative breeding in the pied kingfisher (Japanese). Anima 6: 50-55. Reyer H-U (1982a): Nutzen und Kosten bei brütenden und helfenden Graufischern. Naturw. Rundschau 35, 31-32. Reyer H-U (1980a): Flexible helper structure as an ecological adaptation in the Pied Kingfisher (Ceryle rudis). Behav. Ecol. Sociobiol. 6: 219-227. Reyer H-U (1980b): Sexual dimorphism and cooperative breeding in the striped kingfisher. Ostrich 51, 117-118.                                                             Vocal communication Akustische Kommunikation Isack HA & Reyer H-U (1999): Honey guides and honey gatherers: Interspecific communication in a symbiotic relationship. Science 243: 1343-1346. Reyer H-U & Schmidl D (1988): Helpers have little to laugh about: Group structure and vocalization in the Laughing Kookaburra Dacelo novaeguineae. Emu 88: 150-160.   Sonnenschein E & Reyer H-U (1984): Biology of the slate-coloured boubou and other bush shrikes. Ostrich 55: 86-96. Sonnenschein E & Reyer H-U (1983): Mate guarding and other functions of antiphonal duets in the slate- coloured boubou, Laniarius funebris. Z. Tierpsychol. 63: 112-140. Other projects Sonstige Projekte Sieber Y., Holderegger R, Waser NM, Thomas VFD, Braun S, Erhardt A, Reyer H-U, Wirth LR (2011): Do alpine plants facilitate each other's pollination? Experiments at a small spatial scale. Acta Oecol. 37: 369-374. Geisser H, Reyer H-U (2005): The influence of food and temperature on population density of wild boar Sus scrofa in the Thurgau (Switzerland). J. Zool. 267, 89-96. Geisser H, Reyer H-U (2004): Eficiacy of hunting, feeding, and fencing to reduce crop damage by wild boars. J. Wildl. Manage. 68: 939-946. Barandun J & Reyer H-U (1998): Reproductive ecology of Bombina variegata: Habitat use. Copeia 1998: 497-500. Barandun J & Reyer H-U (1997a): Reproductive ecology of Bombina variegata: Characterisation of spawning ponds. Amphibia- Reptilia 18: 143 -153. Barandun J & Reyer H-U (1997b): Reproductive ecology of Bombina variegata: Development of eggs  and larvae. J. Herpetol. 31: 107-110. Barandun J, Reyer H-U & Anholt, B. (1997): Reproductive ecology of Bombina variegata: Aspects of life history. Amphibia-Reptilia 18: 347-355. Von Helversen O & Reyer H-U (1984): Nectar intake and energy expenditure in a flower visiting bat. Oecologia, 63, 178-184.  Dittami JP & Reyer H-U (1984): A factor analysis of seasonal, behavioral, hormonal and body weight changes in adult male barheaded geese Anser indicus. Behaviour 90 (1-3), 114-124. Reyer H-U (1977): Role of swim-bladder in vertical movement of fishes (Carassius auratus, Salmo gairdneri, Tilapia mariae). Biol. Behav. 2: 109-128. Reyer H-U (1975a): Ursachen und Konsequenzen von Aggressivität bei Etroplus maculatus (Cichlidae, Pisces) – Ein Beitrag zum Triebproblem. Z. Tierpsychol. 39, 415-454. Reyer H-U (1975c): Gibt es einen zur Entladung drängenden Aggressionstrieb? Umschau 75, 576-577. Books, chapters & reviews Bücher, Kapitel & Übersichtsartikel Reyer H-U (2011): Alles nur Zufall? Darwins Evolutionstheorie in ihrer heutigen Gestalt. In: Reyer H-U & Schmid-Hempel P (eds): Darwins langer Arm – Evolutionstheorie heute; pp. 17-36. vdf Hochschulverlag, Zürich. Reyer H-U & Reyer-Sievers H (2011):  “Sein Charakter ist ausserordentlich verträglich” – Briefe und Notizen von Charles und Emma Darwin. In: Reyer H-U & Schmid-Hempel P (eds): Darwins langer Arm – Evolutionstheorie heute; pp. 265-280. vdf Hochschulverlag, Zürich. Reyer H-U & Schmid-Hempel P (eds.) (2011): Darwins langer Arm – Evolutionstheorie heute. vdf Hochschul-Verlag, Zürich. Reyer H-U & Schmid-Hempel P (2009): Erklärungen zum Stammbaum / Explanations Regarding the Tree of Life. In: 200 Jahre Darwin, 150 Jahre Evolutionstheorie. Ausstellungsführer, pp. 6-29. lifescience Zurich, uzh, ethz, Zurich Reyer H-U (1999): Von der Arterhaltung zum egoistischen Gen: Grundbegriffe und Konzepte der Evolutionstheorie. In: Kubli E & Reichardt AK (eds): Konsequenzen der Biologie – Die moderne Biologie und das Verhältnis zwischen Natur- und Geisteswissenschaften; pp. 5-16. Stuttgart: Ernst Klett Schulbuchverlag. Stichweh R, Reyer H-U & Uszkoreit H (1999): Memorandum zu einem Institut für Evolutionswissenschaft. Suchprozesse für innovative Fragestellungen in der Wissenschaft, Heft 1; Werner Reimers Stiftung, Bad Homburg. Reyer H-U (1994b): ‘Do-sido your partner’: Report on the annual conference of the BOU. Ibis 136: 110-112. Reyer H-U (1993b): Third presentation of the Niko Tinbergen-Förderpreis. Ethology 93: 1-2. Reyer H-U (1992): Die Arterhaltung ist tot - es lebe die Erhaltung der Arten. Beilage zu “wildtiere” 3/1992: 1-11. Reyer H-U (1990c): Ökologie - was ist das eigentlich? Beilage zu “wildtiere” 2/1990: 1-8. (Reprinted / Wiederabdruck in: unizürich, p. 6-9 (1990); Chase Nature 10: 10-16 (1991); Schweizer Tierschutz 4/1992: 32-37. Wilkinson GS, Clutton-Brock TH, Grafen A, Harvey PH, Howard RD, Linsenmair KE, Poethke HJ, Reyer H-U, Sutherland WJ, Van Noordwijk AJ, Wade MJ & Wirtz P (1987): The empirical study of sexual selection. In: Bradbury JW & Anderson MB (eds): Sexual selection: testing the alternatives (pp. 234-245). Chichester: J. Wiley & Sons. Reyer H-U & Dunn EK (1985a): Ceryle rudis, Pied Kingfisher - Voice. In: Cramp C (ed.), Handbook of the Birds of Europe, the Middle East and North America, pp. 728-729. Oxford University Press, Oxford. Reyer H-U & Dunn EK (1985b): Halcyon leucocephala, Grey-headed Kingfisher - Social pattern and behaviour. In: Cramp C (ed.), Handbook of the Birds of Europe, the Middle East and North America, pp. 707-708. Oxford University Press, Oxford. Reyer H-U (1984c): Buchbesprechung - Boag D: The Kingfisher / Bezzel E & Pölking F: Kleinod Eisvogel. Zeitschrift für Tierpsychologie 65: 356-357. Reyer H-U (1982b): Soziale Strategien und ihre Evolution. Naturw. Rundschau 35, 6-17. Krebs JR, Bonner JT, Brown JL, Charnov EL, Dichenmann M, McKinney F, Metcalf RA, Olivier TJ, Reyer H-U & Sade DS (1980): Measuring fitness in social systems. In: Markl H (ed): Evolution of social behavior: Hypotheses and empirical tests, pp. 205-218. Verlag Chemie, Weinheim. Reyer H-U (1980c): Buchbesprechung - Colgan PW (ed.): Quantitative Ethology. Zeitschrift für Tierpsychologie 52: 315-317. Reyer H-U (1978): Buchbesprechung - Hazlett BA (ed.): Quantitative Methods in the Study of Animal Behaviour. Zeitschrift für Tierpsychologie 48: 436-440. Reyer H-U (1975d): Buchbesprechung - Pilz G & Moesch H: Der Mensch und die Graugans - Eine Kritik an Konrad Lorenz. Umschau 75: 582. Reyer H-U (1974a): Formen, Ursachen und biologische Bedeutung innerartlicher Aggression bei Tieren. In: K. Immelmann (ed) Verhaltensforschung (Grzimeks Tierleben) Vol. Bd. 16, (pp. 354-391). München: Kindler. Reyer H-U (1974b): Mutter-Kind-Beziehungen bei Primaten. der kinderarzt, Heft 5-7 (Reprinted / Wiederabdruck in: T. Hellbrügge (ed) Kindliche Sozialisation und Sozialentwicklung (pp. 15-42). München: Urban und Schwarzenberg (1975).     Publications / Publikationen For PDF files click on author names, for media coverage on Klicken Sie für PDF-Files auf Autorennamen, für Medienberichte auf                    Research Projects        edited by Reyer H-U   & Schmid-Hempel P  2015 2013 2012 2011 2010 2009 2008 2007 2006 2004 2003 2002 2001 2000 1999 1997 1996 1993 1992 2002 2001 2000 1999 1998 1997 1995 1994 1993 1990 1988 1986 1985 1984 1982 1980 1989 1988 1984 1983 2011 2005 2004 1998 1997 1984 1977 1975 2011 2009 1999 1994 1993 1992 1990 1987 1985 1984 1982 1980 1978 1975 1974 Avian mating systems Paarungssysteme bei Vögeln Rauter C, Reyer H-U & Bollmann K (2002): Selection through predation, snowfall, and micro-climate on nest-site preference in the water pipit Anthus spinoletta. Ibis 144: 433-444. Bollmann K & Reyer H-U (2001): Reproductive success of water pipits in an alpine environment. Condor 103: 510-520. Pasinelli G, Hegelbach J & Reyer H-U (2001): Spacing behavior of the middle spottet woodpecker in Central Europe. J. Wildlife Manage. 65: 432-441. Rauter C, Brodmann PA & Reyer H-U (2000): Provisioning behaviour in relation to food availability and nestling food demand in the alpine water pipit (Anthus spinoletta). Ardea 88: 81-90. Rauter C & Reyer H-U (2000): Thermal and energetic consequences of habitat selection in breeding water pipits (Anthus spinoletta). J. Ornithol. 141: 391-407. Bollmann K & Reyer H-U (1999): Why does monogamy prevail in the alpine water pipit (Anthus spinoletta)? In: Adams, J. & Slotow, R.H. (eds.). Proc. 22 Int. Ornithol. Congr., Durban: 2666-2688. Johannesburg: BirdLife South Africa. Brodmann PA & Reyer H-U (1999): Nestling provisioning in water pipits (Anthus spinoletta): do parents go for specific nutrients or profitable prey? Oecologia 120: 506-514. Rehsteiner U, Geisser H & Reyer H-U (1998): Singing and mating success in water pipits: one specific song song element makes all the difference. Anim. Behav. 55: 1471-1481. Reyer H-U, Fischer W, Steck P, Nabulon T & Kessler P (1998): Sex-specific nest defense in house sparrows (Passer domesticus) varies with badge size of males. Behav. Ecol. Sociobiol. 42: 93-99. Bollmann K, Reyer H-U & Brodmann PA (1997): Territory quality and reproductive success: can alpine water pipits Anthus spinoletta assess the relationship reliably? Ardea 85: 83-98. Brodmann PA, Reyer H-U & Baer B (1997): The relative importance of habitat structure and prey characteristics for the foraging success of water pipits (Anthus spinoletta). Ethology 103: 222-235. Brodmann PA, Reyer H-U, Bollmann K, Schläpfer A & Rauter C (1997): The importance of food quantity and quality for reproductive performance in alpine water pipits (Anthus spinoletta). Oecologia 109: 200-208. Rauter C & Reyer H-U (1997): Incubation pattern and foraging effort of female water pipits (Anthus spinoletta). Ibis 139: 441-446. Reyer H-U, Bollmann K, Schläpfer AR, Schymainda A & Klecack G (1997): Ecological determinants of extra-pair copulations and egg dumping in alpine water pipits (Anthus spinoletta). Behav. Ecol. 8: 534-543. Frey-Roos F, Brodmann PA & Reyer H-U (1995): Relationships between food resources, foraging patterns and reproductive success in the water pipit. Behav. Ecol. 6: 287-295. Reyer H-U (1994a): Ecology and evolution of mating systems. Verh. Dtsch Zool. Ges. 1994 87: 97-113.