Chorus Attendance by Male and Female Painted Reed Frogs (Hyperolius marmoratus): Environmental Factors and Selection Pressures

Henzi, S. Peter; Dyson, Miranda L.; Piper, S. E.; Passmore, Nicole; Bishop, P. J.

doi:10.2307/2390013

Cited by 38 publications

(33 citation statements)

References 26 publications

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“…The high significance of the lagged calling variable in all of our regression models (Table 1) indicates that a major predictor of calling is simply the recent calling of other conspecifics. It has also been shown that the presence of female conspecifics can influence male calling activity in some species (e.g., Henzi et al 1995;Murphy 1999). However, in the present study we were primarily interested in how the abiotic environment influenced calling, and did not explore social facilitation further.…”

Section: Discussionmentioning

confidence: 95%

“…Developmental rates and survivorship of anuran eggs and larvae are known to depend critically on temperature (Moore 1939), so it is reasonable to expect that temperature (particularly water temperature) would be one of the primary exogenous influences on reproduction (see also Navas and Bevier 2001). Other single factors, such as drops in barometric pressure (FitzGerald and Bider 1974a;Obert 1976;Bauch and Grosse 1989), light intensity (Heinzmann 1970), humidity (Bellis 1962), and wind (Henzi et al 1995) also influence the timing of anuran reproductive activity in certain species.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have analysed anuran calling or spawning activity in the context of multiple exogenous factors (e.g., Blankenhorn 1972;Salvador and Carrascal 1990;Dorcas and Foltz 1991;Fukuyama and Kusano 1992;Henzi et al 1995;Brooke et al 2000). Of the abiotic variables measured to date, temperature was found to be the most common predictor of reproductive activity, followed by rain (measured concurrently or time-lagged).…”

Section: Introductionmentioning

confidence: 99%

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Environmental factors influencing calling in sympatric anurans

2002

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Anuran reproduction is influenced by various biotic and abiotic factors, of which temperature and rainfall are the best studied. Here we examine the relationship between multiple abiotic environmental variables - specifically, air and water temperature, rainfall, barometric pressure, relative humidity and wind velocity - and the calling activity of five species (Rana sylvatica, Pseudacris crucifer, Bufo americanus, Rana clamitans, and Rana catesbeiana) in an anuran community in New Brunswick, Canada. Acoustical and environmental data were sampled hourly for 4 months during the breeding season in 1997. Logistic regression analyses indicated that each species responded to a unique combination of meteorological variables, even when calling concurrently. Calling in the spring breeding species, R. sylvatica, P. crucifer, and B. americanus, was most associated with the time of day (i.e., they called primarily at night), while calling in the summer breeding species, R. clamitans and R. catesbeiana, was associated primarily with high water temperature. Species with short breeding periods (i.e., explosive breeders; R. sylvatica, B. americanus) responded to fewer environmental variables than did species with prolonged breeding periods (P. crucifer, R. clamitans, R. catesbeiana). Prolonged breeding species responded differently to climatic variables throughout the breeding season: during the latter half of their calling periods, the time of day and a variable that predicts rain, i.e., barometric pressure, became more important, and water temperature became less important.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental factors influencing calling in sympatric anurans

2002

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“…These environmental factors have also been reported acting differently among anurans species (Woolbright, 1985;Henzi et al, 1995;Mazerolle and Vos, 2006;Phillips et al, 2007). Tozetti and Toledo (2005) also did not find any relation between relative humidity and movement in L. labyrinthicus.…”

Section: Discussionmentioning

confidence: 89%

“…Air and water temperature (FitzGerald and Bider 1974b;Gilbert et al, 1994;Oseen and Wassersug, 2002), rainfall (Obert, 1975;Fukuyama and Kusano, 1992), wind velocity (Henzi et al, 1995), relative humidity (Bellis, 1962;Henzi et al, 1995), light intensity (Bellis, 1962), and lunar phases (Church, 1960;Ferguson, 1960;Kusano et al, 2015) are examples of environmental factors that influence amphibian's breeding activity, acting differently among anuran species (Salvador and Carrascal, 1990). However, the influence of environmental factors on amphibian movements is far from being clarified.…”

Section: Introductionmentioning

confidence: 99%

Ecologia do movimento da rã-manteiga (Leptodactylus latrans) e da rã-touro (Lithobates catesbeianus)

Henrique¹

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oportunidade do conhecimento e crescimento acadêmico através da realização deste trabalho. Agradeço a Fundação de Amparo à Pesquisa do Estrado de São Paulo(FAPESP) e ao Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) por financiar os equipamentos e saídas à campo (Processo FAPESP 2012-10000-5) e pela bolsa de estudo de pós-graduação (Processo CNPq 134324/2015-5) Agradeço ao meu orientador, Prof. Dr. Taran Grant, pela orientação e pela oportunidade e confiança na execução do projeto de mestrado do qual este trabalho foi resultado.Agradeço a Dra. Camila Both, pelos comentários e ajuda na elaboração do meu projeto de mestrado e durante o planejamento e execução das atividades com radiotelemetria de rã-touro. Agradeço também a Ma. Camila Ineu Medeiros por proporcionar minhas primeiras experiências práticas com a biologia da invasão da rã-touro, em seus experimentos em campo em que pude participar.Agradeço a todos os queridos amigos do Laboratório de Anfíbios do IB-USP por toda a ajuda, conversas, discussões e momentos de distração que permearam nossas convivências durante o período em que estive no laboratório. Agradeço em especial ao Gabriel Jorgewich Cohen por toda a ajuda nos diversos campos, por todos os dias e noites que nos encharcamos em brejos e poças, por toda rã-touro que nos escapou pelos dedos e por toda a ajuda e risada em momentos de frustação. Agradeço também as amizades que construí no Departamento de Zoologia do IB-USP, no Museu de Zoologia da USP e na organização dos Cursos de Verão emZoologia, que durante a execução deste trabalho me ajudaram em diversas situações.Agradeço a minha família e aos meus amigos que, mesmo não compreendendo muito bem a vida acadêmica, me apoiaram e respeitaram as minhas escolhas.Agradecimentos específicos encontram-se no final de cada capítulo. INTRODUÇÃO GERALO movimento dos animais desempenha papel importante na aptidão dos indivíduos, no fluxo gênico, na dinâmica de metapopulações e na persistência, a longo prazo, de espécies em um ambiente Pittman et al., 2014).As diferentes estratégias de vida das espécies refletem-se em diferentes padrões de movimentos que exigem diferentes requerimentos ecológicos (Duellman & Trueb, 1994). Para a maioria das espécies, esses movimentos são fundamentais para forragear, reproduzir, evitar condições ambientais severas, e evitar ou escapar de predadores (Zug et al., 2001).A maioria dos anfíbios é conhecida por se mover relativamente pouco durante toda a vida quando comparados com outros vertebrados (Zug et al., 2001). Da eclosão do ovo à morte, um anfíbio muda seu padrão de movimento em resposta a diferentes requerimentos ecológicos. Indivíduos recém metamorfoseados de espécies que se reproduzem em poças, por exemplo, emigram de suas poças natal para se instalarem em suas áreas de vida individuais.A área de vida de um indivíduo pode ser definida como um mapa cognitivo estabelecido pela relação entre o meio ambiente e a percepção do mesmo pelo animal. Essa relação constrói uma área na memória do animal dos luga...

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Effects of environmental variables on invasive amphibian activity: using model selection on quantiles for counts

2018

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Citation: Muller, B. J., B.S. Cade, and L. Schwarzkopf. 2018. Effects of environmental variables on invasive amphibian activity: using model selection on quantiles for counts. Ecosphere 9(1):e02067. 10. 1002/ecs2.2067 Abstract. Many different factors influence animal activity. Often, the value of an environmental variable may influence significantly the upper or lower tails of the activity distribution. For describing relationships with heterogeneous boundaries, quantile regressions predict a quantile of the conditional distribution of the dependent variable. A quantile count model extends linear quantile regression methods to discrete response variables, and is useful if activity is quantified by trapping, where there may be many tied (equal) values in the activity distribution, over a small range of discrete values. Additionally, different environmental variables in combination may have synergistic or antagonistic effects on activity, so examining their effects together, in a modeling framework, is a useful approach. Thus, model selection on quantile counts can be used to determine the relative importance of different variables in determining activity, across the entire distribution of capture results. We conducted model selection on quantile count models to describe the factors affecting activity (numbers of captures) of cane toads (Rhinella marina) in response to several environmental variables (humidity, temperature, rainfall, wind speed, and moon luminosity) over eleven months of trapping. Environmental effects on activity are understudied in this pest animal. In the dry season, model selection on quantile count models suggested that rainfall positively affected activity, especially near the lower tails of the activity distribution. In the wet season, wind speed limited activity near the maximum of the distribution, while minimum activity increased with minimum temperature. This statistical methodology allowed us to explore, in depth, how environmental factors influenced activity across the entire distribution, and is applicable to any survey or trapping regime, in which environmental variables affect activity.

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Chorus Attendance by Male and Female Painted Reed Frogs (Hyperolius marmoratus): Environmental Factors and Selection Pressures

Cited by 38 publications

References 26 publications

Environmental factors influencing calling in sympatric anurans

Environmental factors influencing calling in sympatric anurans

Ecologia do movimento da rã-manteiga (Leptodactylus latrans) e da rã-touro (Lithobates catesbeianus)

Effects of environmental variables on invasive amphibian activity: using model selection on quantiles for counts

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