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Relevant bibliographies by topics / Invasive coqui frogs

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Academic literature on the topic 'Invasive coqui frogs'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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Journal articles on the topic "Invasive coqui frogs"

1

Tuttle, Nathania C., Karen H. Beard, and Robert Al-Chokhachy. "Aerially applied citric acid reduces the density of an invasive frog in Hawaii, USA." Wildlife Research 35, no. 7 (2008): 676. http://dx.doi.org/10.1071/wr07135.

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The Puerto Rican frog (Eleutherodactylus coqui) is an invasive pest in Hawaii. Citric acid is approved for controlling these frogs, but has been limited to terrain accessible by foot or vehicle. We determined the effectiveness of helicopter applications of 16% citric acid and repeated 11% citric acid treatments for eradicating and/or reducing densities of E. coqui by monitoring populations before and after treatment using mark–recapture. We also evaluated the effects of the marking technique, toe-clipping, and weather changes on population parameter estimates. We found that a 16% citric acid treatment appears to have reduced adult E. coqui density 3-fold in a plot, T1, completely covered with citric acid, but did not reduce adult density in a plot, T2, where 6% of the plot was unintentionally not treated. Preadults were reduced 3- to 5-fold in treated plots. The apparent reduction in adults in T1 lasted at least 5 months. Repeated treatments of 11% citric acid were studied in T2 and likely reduced adults 440-fold while preadults were reduced 9-fold. E. coqui that had fewer toe-clips had greater recapture probability and survival estimates, while weather had no effect on parameter estimates. In summary, we found that 16% and 11% citric acid treatments can reduce E. coqui density, treatment effects can last 5 months for adults, and repeated treatments appear more effective for reducing density than single applications.

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2

Niebuhr, Chris N., Susan I. Jarvi, Lisa Kaluna, Bruce L. Torres Fischer, Ashley R. Deane, Israel L. Leinbach, and Shane R. Siers. "Occurrence of Rat Lungworm (Angiostrongylus cantonensis) in Invasive Coqui Frogs (Eleutherodactylus coqui) and Other Hosts in Hawaii, USA." Journal of Wildlife Diseases 56, no. 1 (January 6, 2020): 203. http://dx.doi.org/10.7589/2018-12-294.

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3

Smith, Robyn L., Karen H. Beard, and David N. Koons. "Invasive coqui frogs are associated with greater abundances of nonnative birds in Hawaii, USA." Condor 120, no. 1 (February 2018): 16–29. http://dx.doi.org/10.1650/condor-17-109.1.

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4

Hill, Shane A., Karen H. Beard, Shane R. Siers, and Aaron B. Shiels. "Invasive coqui frogs are associated with differences in mongoose and rat abundances and diets in Hawaii." Biological Invasions 21, no. 6 (March 19, 2019): 2177–90. http://dx.doi.org/10.1007/s10530-019-01965-3.

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5

Pitt, William C. "Management of Invasive Coqui Frog Populations in Hawaii." Outlooks on Pest Management 23, no. 4 (August 1, 2012): 166–69. http://dx.doi.org/10.1564/23aug05.

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6

Beard, Karen H. "Diet of the Invasive Frog, Eleutherodactylus Coqui, in Hawaii." Copeia 2007, no. 2 (May 2007): 281–91. http://dx.doi.org/10.1643/0045-8511(2007)7[281:dotife]2.0.co;2.

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7

Beard, Karen H., Emily A. Price, and William C. Pitt. "Biology and Impacts of Pacific Island Invasive Species. 5. Eleutherodactylus coqui, the Coqui Frog (Anura: Leptodactylidae)." Pacific Science 63, no. 3 (July 2009): 297–316. http://dx.doi.org/10.2984/049.063.0301.

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8

Beard, Karen H., and William C. Pitt. "Potential consequences of the coqui frog invasion in Hawaii." Diversity and Distributions 11, no. 5 (July 26, 2005): 427–33. http://dx.doi.org/10.1111/j.1366-9516.2005.00178.x.

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9

Bernard, Riley F., and William J. Mautz. "Dietary overlap between the invasive coquí frog (Eleutherodactylus coqui) and the Hawaiian hoary bat (Lasiurus cinereus semotus) on the Island of Hawai’i." Biological Invasions 18, no. 12 (July 14, 2016): 3409–18. http://dx.doi.org/10.1007/s10530-016-1232-0.

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10

Beard, Karen H., and William C. Pitt. "Potential predators of an invasive frog (Eleutherodactylus coqui) in Hawaiian forests." Journal of Tropical Ecology 22, no. 03 (April 18, 2006): 345–47. http://dx.doi.org/10.1017/s0266467406003154.

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Dissertations / Theses on the topic "Invasive coqui frogs"

1

Hill, Shane A. "Relationships Among Invasive Coqui Frogs, the Small Indian Mongoose and Rat Species in Hawaii." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7154.

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Non-native species are increasing globally, and with this increase, it is likely that there will be new, unique relationships found among non-natives as well as additional impacts on native species. Rats and mongooses have been introduced to islands throughout the world where they impact native species, including birds, reptiles, and amphibians. The coqui frog was introduced to Hawaii in the 1980’s, where there were already abundant rat and mongoose populations. Previous research suggests that the high densities of coqui frogs may provide enough of a new food source for mongooses and rats that their populations would grow larger than they would without coqui frogs, and that this would exacerbate the negative effects that these predators have on native birds. We investigated whether there are relationships between coqui presence, and the local abundance of introduced rats and mongoose on the island of Hawaii. We also investigated at these 12 sites whether there were indirect effects of coquis on bird nest predation rates using camera traps on artificial nests. Finally, we interpret our results in light of an analysis of the stomach contents of mongooses and rats, and data collected from remote cameras monitoring scavengers of dead coqui frogs. We compared abundances of mammals in coqui invaded plots and uninvaded plots. In areas where coquis were present, we found a greater number of mongooses, and less Pacific rats. Both predators consume coquis, but mongooses were more important consumers of live and dead coquis. Shifts in mongoose and rat diets were observed in coqui invaded and uninvaded plots. It may be that coqui frogs are competing with rats because we found more fruit in rat stomachs collected in coqui invaded compared to uninvaded plots. We did not observe any difference in nest predation rates with and without coquis. Our results show that the coqui may serve as novel prey and/or competitors to non-native mammals.

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2

Smith, Robyn L. "Invasive Coqui Frogs Serve as Novel Prey for Birds in Hawaii, and Not as Competitors." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5203.

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The Puerto Rican coqui frog (Eleutherodactylus coqui) has been hypothesized to affect bird communities in Hawaii by 1) competing with insectivorous birds for prey, 2) providing prey for predatory birds, and 3) bolstering populations of non-native mammals by serving as prey. No previous studies have collected empirical data on these potential impacts. We investigated the impact of coquis on birds at two scales. For our first research question, we used stable isotope analyses to address whether three species of insectivorous bird, one native and two non-native, and coquis could compete for invertebrate prey. We found that the coquis overlapped in isotopic niche space with all three bird species, which suggests these species occupy a similar place in the food web. However, our Bayesian diet analysis suggests that coquis mostly feed on Acari, Amphipoda, and Blattodea (>90%), and only consume about 2% Araneae, the only diet source they share with birds. This result suggests that coquis do not heavily compete with these bird species for prey. For our second research question, we conducted avian point counts in coqui and non-coqui plots across 15 sites on the island of Hawaii. We modeled whether coqui presence or density explained patterns of insectivorous, vertebrate-preying, and native bird abundance. We estimated abundances of birds in coqui and non-coqui plots using hierarchical Bayesian N-mixture models with random effects. We tested whether habitat variables differed across coqui and non-coqui plots and whether coqui density was correlated with any habitat variable to more confidently attribute changes in bird abundance across coqui and non-coqui plots to the frogs. We found that coquis were associated with greater abundances of vertebrate-preying, generalist insectivorous, and non-native birds in Hawaii. Vertebrate-preying birds showed the strongest association, with a 0.97 probability of abundance being at least 50% higher in coqui plots. Native birds did not show differences in abundance across coqui and non-coqui plots. Because insectivorous bird and native bird abundance did not differ across coqui invasion fronts, our results suggest that coquis primarily affect Hawaiian birds by serving as a food resource for predatory birds, and not as competitors for invertebrate prey.

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3

O'Neill, Eric Michael. "Evolutionary Consequences of the Introduction of Eleutherodactylus Coqui to Hawaii." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/305.

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The introduction of a species to areas outside its native range can result in ecological and genetic changes of evolutionary significance. The frog Eleutherodactylus coqui was introduced to Hawaii, from Puerto Rico, in the late 1980s and has lost genetic variation in mitochondrial DNA. The extent to which founder effects have influenced phenotypic variation in the introduced range is unknown. In this study I compared phenotypic variation in life-history traits, advertisement calls, and stripe patterns among introduced and native populations of the frog Eleutherodactylus coqui. I also conducted laboratory experiments to determine the influence of genetics and temperature on trait variation. Body size in wild populations was positively correlated with elevation in both ranges, but the slope of elevation on body size was greater in Puerto Rico than in Hawaii. Advertisement call frequencies and rates were negatively correlated with elevation but duration was positively correlated with elevation. Frequencies were correlated with body size, but rate, duration, and intensity were not. Color patterns are more variable in Puerto Rico than Hawaii and appear to be maintained by balancing selection in Puerto Rico. Lab results indicate that body size is negatively correlated with temperature, which may explain Bergmann's rule in the field, but patterns of intrinsic growth rate may explain differences in the effect of elevation between Hawaii and Puerto Rico. Body size appears to explain most of the variation in call frequencies, whereas temperature explained most of the variation in rate and duration. Color patterns appear to be determined by a single locus with five alleles. Founder effects appear to explain the difference between Hawaii and Puerto Rico in color pattern variation and in clinal variation in body size and call frequencies. The loss of genetic variation in these traits is likely to have evolutionary consequences for this species in Hawaii.

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4

McGuire, Raymond. "Does the invasive tree, Falcataria moluccana facilitate high population density of the invasive Puerto Rican frog, Eleutherodactylus coqui? /." University of Hawai'i at Hilo, 2009. http://proquest.umi.com/pqdweb?did=1666865381&sid=1&Fmt=2&clientId=23658&RQT=309&VName=PQD.

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5

Kalnicky, Emily A. "A Coupled Human and Natural Systems Approach to Understanding an Invasive Frog, Eleutherodactylus Coqui, in Hawaii." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1412.

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Human activities worldwide have altered nature in ways that create new combinations of species and environmental processes. To understand so-called "novel ecosystems" it is important to consider both the natural and the societal factors that shape them, and how those factors are interconnected or "coupled." We used such an approach to explore options for managing a non-native invasive frog, the coqui, which has become established on the island of Hawaii and threatens to spread to other parts of the state. The nighttime calls of the coqui create a nuisance for property owners when populations become dense enough, as often occurs in Hawaii where the frogs have no natural enemies. Humans have tried various ways to eliminate coqui on the island of Hawaii with little success. Therefore we studied how property owners cope with their presence, both through management practices and psychological coping strategies. We also examined results of those efforts. People whose properties had more frogs were more likely to take action to reduce their numbers, but also attitudes toward the coqui were less negative when people had grown used to having to share their properties with the frogs. For those who cannot cope psychologically, we found it would be possible to manage properties to reduce densities but only when leaf litter and low shrubs were completely removed from near a home. Information campaigns about managing coqui should be different when targeting people that already host frogs and those that do not.

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Books on the topic "Invasive coqui frogs"

1

Singer, Sydney Ross, and Soma Grismaijer. Panic in Paradise: Invasive Species Hysteria and the Hawaiian Coqui Frog War (Environmentalism Gone Mad!). ISCD Press, 2005.

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Book chapters on the topic "Invasive coqui frogs"

1

Beard, Karen H., Steve A. Johnson, and Aaron B. Shiels. "Frogs (Coqui Frogs, Greenhouse Frogs, Cuban Tree Frogs, and Cane Toads)." In Ecology and Management of Terrestrial Vertebrate Invasive Species in the United States, 163–92. Boca Raton : Taylor & Francis, 2018. | “A CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa plc.”: CRC Press, 2017. http://dx.doi.org/10.1201/9781315157078-9.

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2

"Eleutherodactylus coqui Thomas (Caribbean tree frog)." In A Handbook of Global Freshwater Invasive Species, 317–25. Routledge, 2012. http://dx.doi.org/10.4324/9780203127230-38.

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