Invasive bullfrogs as predators in a Neotropical assemblage: What frog species do they eat?
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Anurans are important prey for the American bullfrog Lithobates catesbeianus, but field assessments of its diet in the context of a local prey assemblage are lacking. We aimed to identify the frog species consumed by an invasive bullfrog population in subtropical South America, and to assess their relative importance among other types of prey. Characterization of the frog assemblage in the study area also allowed us to calculate the degree of electivity of the recorded anuran prey, in order to gain insight regarding bullfrog feeding preferences and to test if the bullfrog prey composition differed from a random sample of the assemblage. A total of 32.6% of the bullfrogs had at least one anuran in the stomach contents, and post-metamorphic anurans represented 49.1% of the relative prey importance for adult bullfrogs. Anurans were preyed on by all size classes, and constituted the volumetrically most important prey category in the diet of individuals heavier than 100 g. Cycloramphidae, Hylidae and Leiuperidae were positively selected, and Hypsiboas pulchellus and Physalaemus cuvieri were the species most often taken. We found a low occurrence of cannibalism, despite the high density of bullfrogs at the study site. Our results showed that the degree of electivity differed among bullfrog prey types, suggesting that some frog species may be preyed on in a higher proportion than their relative abundance in the assemblage. Testing the clues provided by this assemblage-level approach may lead to a better assessment of the interactions between bullfrogs and the native frog fauna.
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Boelter R.A., Cechin S.Z. (2007) Impact of the Bullfrog diet (Lithobates catesbeianus – Anura, Ranidae) on native fauna: case study from the region of Agudo – RS – Brazil. Nat. Conserv., 5, 115-123.
-
Both C., Kaefer I.L., Santos T.G., Cechin S.Z. (2008) An austral anuran assemblage in the Neotropics: seasonal occurrence correlated with photoperiod. J. Nat. Hist., 42, 205-222.
-
Both C., Lingnau R., Santos-Jr A.P., Madalozzo B., Lima L.P., Grant T. (2011) Widespread occurrence of the American bullfrog, Lithobates catesbeianus (Shaw, 1802) (Anura: Ranidae), in Brazil. South American J. Herpetol., 6, 127-134.
-
Bury R.B., Whelan J.A. (1984) Ecology and Management of the Bullfrog. Resource Publication 155, US Department of the Interior, Washington, D.C.
-
Cook D.G., Jennings M.R. (2007) Microhabitat use of the California Red-legged Frog and introduced Bullfrog in a seasonal marsh. Herpetologica, 63, 430-440.
-
Crump M.L., Scott N.J.J. (1994) Visual encounter surveys. In: Heyer W.R., Donnelly M.A., McDiarmid R.W., Hayek L.C., Foster M.S. (Eds.) Measuring and Monitoring Biological Diversity: Standard Methods for Amphibians, pp. 84-92. Smithsonian Institution Press, Washington, D.C.
-
Daszak P., Cunningham A., Hyatt A.D. (2003) Infectious disease and amphibian population declines. Divers. Distrib., 9, 141-150.
-
Davis M.A. (2009) Invasion Biology. Oxford University Press, Oxford.
-
Doan T.M. (2003) Which methods are most effective for surveying rain forest herpetofauna? J. Herpetol., 37, 72-81.
-
Giovanelli J.G.R., Haddad C.F.B., Alexandrino J. (2007) Predicting the potential distribution of the alien invasive American Bullfrog (Lithobates catesbeianus) in Brazil. Biol. Invasions, 10, 585-590.
-
Gotelli N.J., Entsminger G.L. (2007) EcoSim: Null Models Software for Ecology (version 7). 7th ed. Acquired Intelligence Inc. and Kesay-Bear, Jericho. Available at http://garyentsminger.com/ecosim.htm.
-
Govindarajulu P., Price W.M.S., Anholt B.R. (2006) Introduced bullfrogs (Rana catesbeiana) in western Canada: has their ecology diverged? J. Herpetol., 40, 249-260.
-
Hirai T. (2004) Diet composition of introduced bullfrog, Rana catesbeiana, in the Mizorogaike Pond of Kyoto, Japan. Ecol. Res., 19, 375-380.
-
Hothem R.L., Meckstroth A.M., Wegner K.E., Jennings M.R., Crayon J.J. (2009) Diets of three species of anurans from the Cache Creek watershed, California, USA. J. Herpetol., 43, 275-283.
-
Jacobs J. (1974) Quantitative measurement of food selection: a modification of the forage ratio and Ivlev’s electivity indices. Oecologia, 14, 413-417.
-
Kaefer I.L., Boelter R.A., Cechin S.Z. (2007) Reproductive biology of the invasive bullfrog Lithobates catesbeianus in southern Brazil. Ann. Zool. Fenn., 44, 435-444.
-
Klein R.M. (1984) Aspectos dinâmicos da vegetação do sul do Brasil. Sellowia, 36, 5-54.
-
Legendre P., Legendre L. (1998) Numerical Ecology. Elsevier, Amsterdam.
-
Lowe S., Browne M., Boudjelas S., De Poorter M. (2000) 100 of the World’s Worst Invasive Alien Species: A Selection from the Global Invasive Species Database. The Invasive Species Specialist Group, Auckland.
-
Magnusson W.E., Lima A.P., Silva W.A., Araújo M.C. (2003) Use of geometric forms to estimate volume of invertebrates in ecological studies of dietary overlap. Copeia, 2003, 13-19.
-
Menin M., Lima A.P., Magnusson W.E., Waldez F. (2007) Topographic and edaphic effects on the distribution of terrestrially reproducing anurans in Central Amazonia: mesoscale spatial patterns. J. Trop. Ecol., 23, 539-547.
-
Parker I.M., Simberloff D., Lonsdale W.M., Goodell K., Wonham M., Kareiva P.M., Williamson M.H., Von Holle B., Moyle P.B., Byers J.E., Goldwasser L. (1999) Impact: toward a framework for understanding the ecological effects of invaders. Biol. Invasions, 1, 3-19.
-
Pearl C.A., Adams M.J., Bury R.B., McCreary B. (2004) Asymmetrical effects of introduced Bullfrogs (Rana catesbeiana) on native ranid frogs in Oregon. Copeia, 2004, 11-20.
-
Pinkas L., Oliphant M.S., Iverson I.L.K. (1971) Food habits of albacore, bluefin tuna, and bonito in California waters. Calif. Fish Game Fish. Bull., 152, 105.
-
Santos T.G., Kop K., Spies M.R., Trevisan R., Cechin S.Z. (2008) Distribuição temporal e espacial de anuros em área de Pampa, Santa Maria, RS. Iheringia Sér. Zool., 98, 244-253.
-
Schloegel L.M., Ferreira C.M., James T.Y., Hipolito M., Longcore J.E., Hyatt A.D., Yabsley M., Martins A.M.C.R.P.F., Mazzoni R., Davies A.J., Daszak P. (2010) The North American bullfrog as a reservoir for the spread of Batrachochytrium dendrobatidis in Brazil. Anim. Conserv., 13, 53-61.
-
Silva E.T., Reis E.P., Feio R.N., Ribeiro Filho O.P. (2009) Diet of the invasive frog Lithobates catesbeianus (Shaw, 1802) (Anura: Ranidae) in Viçosa, Minas Gerais State, Brazil. South American J. Herpetol., 4, 286-294.
-
Silva E.T., Ribeiro Filho O.P., Feio R.N. (2011) Predation of native anurans by invasive Bullfrogs in Southeastern Brazil: Spatial variation and effect of microhabitat use by prey. South American J. Herpetol., 6, 1-10.
-
Silvano D.L., Segalla M.V. (2005) Conservação de anfíbios no Brasil. Megadiversidade, 1, 79-86.
-
Toledo L.F., Ribeiro L.S., Haddad C.F.B. (2007) Anurans as prey: an exploratory analysis and size relationships between predators and their prey. J. Zool., 271, 170-177.
-
Wang Y., Guo Z., Pearl C.A., Li Y. (2007) Body size affects the predatory interactions between introduced American Bullfrogs (Rana catesbeiana) and native anurans in China: an experimental study. J. Herpetol., 41, 514-520.
-
Wang Y., Li Y. (2009) Habitat selection by the introduced American Bullfrog (Lithobates catesbeianus) on Daishan Island, China. J. Herpetol., 43, 205-211.
-
Werner E.E., Wellborn G.A., McPeek M.A. (1995) Diet composition in postmetamorphic bullfrogs and green frogs: Implications for interspecific predation and competition. J. Herpetol., 29, 600-607.
-
Wu Z., Li Y., Wang Y., Adams M.J. (2005) Diet of introduced bullfrogs (Rana catesbeiana): Predation on and diet overlap with native frogs on Daishan Island, China. J. Herpetol., 39, 668-674.
-
Young B.E., Stuart S.N., Chanson J.S., Cox N.A., Boucher T.M. (2004) Disappearing Jewels: The Status of New World Amphibians. NatureServe, Arlington.
-
Zimmerman B.L. (1994) Audio strip transects. In: Heyer W.R., Donnelly M.A., McDiarmid R.W., Hayek L.C., Foster M.S. (Eds.) Measuring and Monitoring Biological Diversity: Standard Methods for Amphibians, pp. 92–97. Smithsonian Institution Press, Washington, D.C.
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| Abstract Views | 691 | 135 | 8 |
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Invasive bullfrogs as predators in a Neotropical assemblage: What frog species do they eat?
In: Animal BiologySearch for other papers by Ruben A. Boelter in
Current site
Google Scholar
PubMed
Search for other papers by Igor L. Kaefer in
Current site
Google Scholar
PubMed
Search for other papers by Camila Both in
Current site
Google Scholar
PubMed
Search for other papers by Sonia Cechin in
Current site
Google Scholar
PubMed
Anurans are important prey for the American bullfrog Lithobates catesbeianus, but field assessments of its diet in the context of a local prey assemblage are lacking. We aimed to identify the frog species consumed by an invasive bullfrog population in subtropical South America, and to assess their relative importance among other types of prey. Characterization of the frog assemblage in the study area also allowed us to calculate the degree of electivity of the recorded anuran prey, in order to gain insight regarding bullfrog feeding preferences and to test if the bullfrog prey composition differed from a random sample of the assemblage. A total of 32.6% of the bullfrogs had at least one anuran in the stomach contents, and post-metamorphic anurans represented 49.1% of the relative prey importance for adult bullfrogs. Anurans were preyed on by all size classes, and constituted the volumetrically most important prey category in the diet of individuals heavier than 100 g. Cycloramphidae, Hylidae and Leiuperidae were positively selected, and Hypsiboas pulchellus and Physalaemus cuvieri were the species most often taken. We found a low occurrence of cannibalism, despite the high density of bullfrogs at the study site. Our results showed that the degree of electivity differed among bullfrog prey types, suggesting that some frog species may be preyed on in a higher proportion than their relative abundance in the assemblage. Testing the clues provided by this assemblage-level approach may lead to a better assessment of the interactions between bullfrogs and the native frog fauna.
| All Time | Past Year | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 691 | 135 | 8 |
| Full Text Views | 181 | 10 | 4 |
| PDF Views & Downloads | 42 | 13 | 4 |