Dissertação

Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity

1 – Many studies have shown that insectivorous bats frequently use riparian zones around streams, but it is often unclear whether the bats are using those areas for feeding or are just making use of the uncluttered areas over streams as movement corridors. No study of Neotropical bats has investigat...

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Autor principal: Oliveira, Leonardo Queiroz de
Grau: Dissertação
Idioma: por
Publicado em: Instituto Nacional de Pesquisas da Amazônia - INPA 2020
Assuntos:
Insetos
Morcegos
Morcegos em Zonas ripárias
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/11937
http://lattes.cnpq.br/1149807441877810
id oai:repositorio:1-11937
recordtype dspace
spelling oai:repositorio:1-11937 Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity Oliveira, Leonardo Queiroz de Bobrowiec, Paulo Estéfano Dineli Insetos Morcegos Morcegos em Zonas ripárias 1 – Many studies have shown that insectivorous bats frequently use riparian zones around streams, but it is often unclear whether the bats are using those areas for feeding or are just making use of the uncluttered areas over streams as movement corridors. No study of Neotropical bats has investigated the relative use of riparian zones and areas far from streams for foraging. 2 – We studied the effects of vegetation structure and food availability on the activity of the aerial insectivorous bat Pteronotus parnellii near and far from streams in tropical rainforest in Reserva Ducke, Central Amazonia. 3- We used horizontal photographs of understory vegetation to quantify the degree of obstruction (clutter) by leaves and branches. Food availability was evaluated with small light traps designed to catch nocturnal insects. Bat activity was monitored with high-frequency sound recorders that operated continually for 60 hours at each site. 4 – In contrast to previous studies, most of which used mist nets, we found P. parnellii to be more active in places with dense understory vegetation, which were more common outside riparian zones. Food availability was also higher in places with more vegetation clutter. 5 – Generalizations in the literature, based on morphology, indicate that P. parnellii should be more active in sites with little vegetation clutter. However, we found the species to be more active in cluttered sites, indicating that food availability may be more important than clutter in determining where the bats foraged. 1 - Muitos estudos têm mostrado que os morcegos insetívoros utilizam frequentemente zonas ripárias em torno de riachos, mas não é totalmente claro se os morcegos estão usando essas áreas para alimentação ou apenas para comutar entre ambientes usando os corredores de vegetação sobre os riachos. Nenhum estudo de morcegos neotropicais investigou o uso relativo de zonas ripárias e áreas distantes dos rios para forrageio dos morcegos. 2 – Estudei quais são os efeitos da estrutura da vegetação e disponibilidade de alimentos sobre a atividade do morcego insetívoro aéreo Pteronotus parnellii perto e longe de riachos na floresta tropical na Reserva Ducke, Manaus, Amazônia Central. 3 - Utilizei fotografias horizontais de vegetação rasteira entre 0 e 3m de altura para quantificar o grau de obstrução ( desordem ) provocado por folhas e ramos . A disponibilidade de alimentos foi avaliada com pequenas armadilhas luminosas projetadas para capturar insetos noturnos. A atividade dos morcegos foi monitorada com aparelhos de gravação de sons de alta frequência que operaram continuamente por 60 horas em cada unidade amostral. 4 - Em contraste com estudos anteriores, a maioria dos quais utilizaram redes de neblina, meus resultados sugerem que P. parnellii é mais ativo em locais com vegetação rasteira densa, mais comum fora das zonas ripárias. A disponibilidade de alimentos também foi maior em locais com vegetação mais obstruída. 5 - Generalizações na literatura sobre a morfologia indicam que P. parnellii deve ser mais ativo em locais com pouca obstrução da vegetação. No entanto, encontramos maior atividade em locais altamente obstruídos, indicando que a disponibilidade de alimentos pode ser mais importante do que a complexidade da vegetação para determinar onde os morcegos forrageiam. 2020-02-17T18:03:36Z 2020-02-17T18:03:36Z 2014-03-17 Dissertação https://repositorio.inpa.gov.br/handle/1/11937 http://lattes.cnpq.br/1149807441877810 por Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Instituto Nacional de Pesquisas da Amazônia - INPA Ecologia
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language por
topic Insetos
Morcegos
Morcegos em Zonas ripárias
spellingShingle Insetos
Morcegos
Morcegos em Zonas ripárias
Oliveira, Leonardo Queiroz de
Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
topic_facet Insetos
Morcegos
Morcegos em Zonas ripárias
description 1 – Many studies have shown that insectivorous bats frequently use riparian zones around streams, but it is often unclear whether the bats are using those areas for feeding or are just making use of the uncluttered areas over streams as movement corridors. No study of Neotropical bats has investigated the relative use of riparian zones and areas far from streams for foraging. 2 – We studied the effects of vegetation structure and food availability on the activity of the aerial insectivorous bat Pteronotus parnellii near and far from streams in tropical rainforest in Reserva Ducke, Central Amazonia. 3- We used horizontal photographs of understory vegetation to quantify the degree of obstruction (clutter) by leaves and branches. Food availability was evaluated with small light traps designed to catch nocturnal insects. Bat activity was monitored with high-frequency sound recorders that operated continually for 60 hours at each site. 4 – In contrast to previous studies, most of which used mist nets, we found P. parnellii to be more active in places with dense understory vegetation, which were more common outside riparian zones. Food availability was also higher in places with more vegetation clutter. 5 – Generalizations in the literature, based on morphology, indicate that P. parnellii should be more active in sites with little vegetation clutter. However, we found the species to be more active in cluttered sites, indicating that food availability may be more important than clutter in determining where the bats foraged.
author_additional Bobrowiec, Paulo Estéfano Dineli
author_additionalStr Bobrowiec, Paulo Estéfano Dineli
format Dissertação
author Oliveira, Leonardo Queiroz de
title Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
title_short Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
title_full Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
title_fullStr Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
title_full_unstemmed Activity of an Amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
title_sort activity of an amazonian aerial insectivorous bat depends more of food resources than vegetation structural complexity
publisher Instituto Nacional de Pesquisas da Amazônia - INPA
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/11937
http://lattes.cnpq.br/1149807441877810
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score 11.755432

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