2004
DOI: 10.1590/s1519-566x2004000400001
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Cues for territory choice in two tropical dragonflies

Abstract: Critérios Para a Escolha de Territórios em Duas Libélulas TropicaisRESUMO -A classificação dos sistemas de acasalamento em Odonata geralmente baseia-se na habilidade dos machos em controlar o acesso das fêmeas aos recursos necessários à postura dos ovos. O objetivo deste artigo foi determinar os critérios de seleção de locais para a defesa de territórios para machos das espécies Perithemis mooma Kirby e Orthemis discolor (Burmeister) (Libellulidae), em Viçosa, controlando a disponibilidade de poleiros e de veg… Show more

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Cited by 21 publications
(13 citation statements)
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“…The variation in species abundance aids the identification of gradual changes in beta diversity patterns, which may not be possible when exclusively using incidence data (Siqueira et al 2015). The variation in abundance found in this study was also expected based on the ecophysiological hypothesis (De Marco and Resende 2004); this predicts a decrease in the abundance of Zygoptera from headwaters to large rivers and the opposite pattern for Anisoptera. It is possible that changes in abundance provide more insightful results because the environmental gradient affecting the distribution of odonates does not change abruptly and is not severe enough to eliminate individuals occurring outside their preferred habitat, such as an individual anisopteran that prefers large rivers but can fly over smaller streams.…”
Section: Discussionsupporting
confidence: 73%
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“…The variation in species abundance aids the identification of gradual changes in beta diversity patterns, which may not be possible when exclusively using incidence data (Siqueira et al 2015). The variation in abundance found in this study was also expected based on the ecophysiological hypothesis (De Marco and Resende 2004); this predicts a decrease in the abundance of Zygoptera from headwaters to large rivers and the opposite pattern for Anisoptera. It is possible that changes in abundance provide more insightful results because the environmental gradient affecting the distribution of odonates does not change abruptly and is not severe enough to eliminate individuals occurring outside their preferred habitat, such as an individual anisopteran that prefers large rivers but can fly over smaller streams.…”
Section: Discussionsupporting
confidence: 73%
“…This gradient results in species that exhibit distinct life strategies (including ecophysiological requirements and behaviors for thermoregulation), with different sites for reproduction, feeding, and thermoregulation. The ecophysiological hypothesis (De Marco and Resende 2004) predicts changes from narrow and shaded streams hosting small perching species that are dependent on air temperature and able to thermoregulate in shaded areas (Corbet 1999) to large rivers with high levels of sunlight which attract larger species (e.g., Hetaerina and Perithemis species). Moreover, some odonates prefer specific macrophytes on which to perch and lay eggs (Butler and deMaynadier 2007), suggesting that availability of oviposition sites should lead to the clustering of closely related species that share the same oviposition strategy.…”
Section: Discussionmentioning
confidence: 99%
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“…A amostragem foi conduzida apenas quando a temperatura esteve acima de 19 0 C, e entre as 11:00 e 15:00h, pois fora destes parâmetros a atividade de Odonata decresce muito (May 1976;De MarCo Jr & reSenDe 2004). O método de levantamento dos indivíduos foi baseado no método de varredura por scan (De MarCo 1998), muito utilizado em estudos com estes organismos (Pinto 2011;De MarCo 2008).…”
Section: Método De Amostragemunclassified
“…As libélulas do gênero Perithemis são territoriais e defendem seu território de forma agressiva para afastar outros machos ou fazer captura em voo (Switzer 2002). A preferência dos machos por áreas com vegetação para os territórios deve estar relacionada com a seleção local de oviposição pelas fêmeas, o que conduz à agregação de vários machos em torno dos locais com maiores agregações dos recursos utilizados pelas fêmeas (De MarCo & reSenDe 2004). Disputas pela manutenção de territórios e, consequentemente, de potenciais parceiros para reprodução, pode culminar em comportamentos agonísticos entre indivíduos de uma mesma espécie (Switzer 2002).…”
unclassified