Pregled bibliografske jedinice broj: 611321
Testing the aposematic coloration in Madagascan poison frogs, genus Mantella
Testing the aposematic coloration in Madagascan poison frogs, genus Mantella // 14th European congress of herpetology. Abstract book. / Carretero, M.A. ; Brito, J.C. (ur.).
Porto: CIBIO, Portugal, 2007. str. 92-92 (predavanje, nije recenziran, sažetak, znanstveni)
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Naslov
Testing the aposematic coloration in Madagascan poison frogs, genus Mantella
Autori
Jovanović, Olga ; Vences, Miguel
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
14th European congress of herpetology. Abstract book.
/ Carretero, M.A. ; Brito, J.C. - Porto : CIBIO, Portugal, 2007, 92-92
Skup
14th european congress of herpetology.
Mjesto i datum
Porto, Portugal, 19.09.2007. - 23.09.2007
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
aposematism; predation; Madagascar; field experiments
Sažetak
Predator avoidance of warningly coloured prey (aposematism) is based upon learning and reinforcement. Theoretical models involving learning psychology and game theory have suggested how warning colouration in unprofitable prey could evolve and become stable. We made preliminary tests of the efficiency of aposematic colouration in Madagascan poison frogs, genus Mantella. A first experiment was done by feeding snakes (genera Liopholidophis and Geodipsas ; their natural predators) with Mantella and edible non-conspicuous frogs at the same time, giving the snakes the opportunity to choose. The preliminary results showed preference in snakes for non-conspicuous frogs over specimens of Mantella. Out of total 137 frog/days offered to snakes (68 Mantella and 69 edible frogs), 43 frogs were eaten, from which 9 Mantella and 34 edible frogs. A second experiment was carried out using clay frog models in different colours: brown (resembling edible frogs), orange (resembling Mantella aurantiaca) and blackyellow (resembling Mantella baroni / madagascariensis). The experiment was set in areas populated by Mantella aurantiaca (Andasibe region) as well as in areas populated by Mantella baroni and M. madagascariensis (Ranomafana National Park), and at control sites (without Mantella populations) in both areas. Predators had different preferences for different colours of models at all sites, but no significant difference for colour preference between Mantella sites (with experienced predators) and control sites (with presumably naive predators) was found.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
