ABSTRACT
Podium angustifrons Kohl 1902 is a species of solitary wasp which nests in pre-existing cavities, with neotropical distribution in Argentina, Bolivia, Brazil, Colombia, Guyana and French Guyana. The aim of this study was to investigate the nesting biology of P. angustifrons, discussing aspects of their life history. To capture its nests, wooden trap-nests were installed in the Parque Municipal das Araucárias, Guarapuava (PR), Brazil, from January 2003 to April 2009. A total of 29 nests were collected, all during the warmer months. These showed no vestibular and intercalary cells, and their closures were made up of chewed plants and mud mixed with organic materials and resin-coated surfaces, sometimes showing a layer of lichens. The cells were provisioned with various wild species of cockroaches (Chorisoneura sp, Riata sp and Helgaia sp) in the nymph stage and/or adults. The sex ratio was 4.6 females per male, significantly higher that the expected 1:1. Most pre-pupae entered diapause in winter with development time ranging from 187 to 283 days for females and 180 to 283 days for males. Deaths occurred in 41.66% of cells provisioned, 33.33% were attributed to faulty development and 8.33% to Chrysididae.
Subject(s)
Nesting Behavior/physiology , Wasps/physiology , Animals , Brazil , Female , Life Cycle Stages , Male , Seasons , Trees , Wasps/growth & developmentABSTRACT
Podium angustifrons Kohl 1902 is a species of solitary wasp which nests in pre-existing cavities, with neotropical distribution in Argentina, Bolivia, Brazil, Colombia, Guyana and French Guyana. The aim of this study was to investigate the nesting biology of P. angustifrons, discussing aspects of their life history. To capture its nests, wooden trap-nests were installed in the Parque Municipal das Araucárias, Guarapuava (PR), Brazil, from January 2003 to April 2009. A total of 29 nests were collected, all during the warmer months. These showed no vestibular and intercalary cells, and their closures were made up of chewed plants and mud mixed with organic materials and resin-coated surfaces, sometimes showing a layer of lichens. The cells were provisioned with various wild species of cockroaches (Chorisoneura sp, Riata sp and Helgaia sp) in the nymph stage and/or adults. The sex ratio was 4.6 females per male, significantly higher that the expected 1:1. Most pre-pupae entered diapause in winter with development time ranging from 187 to 283 days for females and 180 to 283 days for males. Deaths occurred in 41.66% of cells provisioned, 33.33% were attributed to faulty development and 8.33% to Chrysididae.(AU)
Podium angustifrons Kohl 1902 é uma espécie de vespa solitária que nidifica em cavidades pré-existentes, com distribuição na Argentina, Bolívia, Brasil, Colômbia, Guiania e Guiana Francesa. O objetivo deste estudo foi investigar a biologia de nidificação desta espécie, discutindo aspectos de sua história de vida. Para captura seus ninhos, foram instaladas ninhos-armadilha de madeira no Parque Municipal das Araucárias, Guarapuava (PR), Brasil, de Janeiro 2003 até Abril de 2009. Foram coletados 29 ninhos, durante todos os meses quentes. Os ninhos não apresentaram células vestibulares e intercalares, seus fechamentos são constituídos por material vegetal mascado, seguido de barro misturado a materiais orgânicos, revestidos por resina, podendo ter uma camada de liquens. As células foram aprovisionadas com diferentes espécies de baratas silvestres (Chorisoneura sp, Riata sp e Helgaia sp) em estágio de ninfa e/ou adulto. A maioria das pré-pupas entrou em diapausa no inverno com tempo de desenvolvimento de 187 a 283 dias para as fêmeas e 180 a 283 dias para machos. Ocorreu mortalidade em 41,66% das células aprovisionadas, sendo 33,33% causado por falha de desenvolvimento e 8,33% por cleptoparasitas da família Chrysididae.(AU)
Subject(s)
Animals , Male , Female , Embryo Implantation , Wasps/physiology , Brazil , Life Cycle Stages , Seasons , Trees , Wasps/growth & developmentABSTRACT
The aim of this study was to compare biological aspects of the Pachodynerus species occurring in the Parque Municipal das Araucárias, Guarapuava, Paraná, Southern Brazil. It was carried from December 2001 to December 2004. Forty one nests belonging to 5 species were collected, of which 17 Pachodynerus guadulpensis, 15 Pachodynerus sp., 1 Pachodynerus argentinus, 1 Pachodynerus ca guadulpensis and 7 Pachodynerus nasidens. The nesting activity of Pachodynerus sp., P. argentinus and P. guadulpensis occurred in similar periods, from December to March, with the exception of P.guadulpensis, that built one nest in October. Pachodynerus ca guadulpensis nested in March and P. nasidens from January to April. The nests of Pachodynerus species present a very similar architecture, comprising a linear series of cylindrical cells that fit perfectly into each other forming a continuous tube. With these results we were able to conclude that, even though Pachodynerus species present common characteristics, such as nest architecture, nesting activities and habitats in which they occur, the used resources, mortality rates, etc., vary among groups of species occurring in different regions.
Subject(s)
Ecosystem , Nesting Behavior/physiology , Wasps/physiology , Animals , Brazil , Female , Male , Seasons , Wasps/classificationABSTRACT
The aim of this study was to compare biological aspects of the Pachodynerus species occurring in the Parque Municipal das Araucárias, Guarapuava, Paraná, Southern Brazil. It was carried from December 2001 to December 2004. Forty one nests belonging to 5 species were collected, of which 17 Pachodynerus guadulpensis, 15 Pachodynerus sp., 1 Pachodynerus argentinus, 1 Pachodynerus ca guadulpensis and 7 Pachodynerus nasidens. The nesting activity of Pachodynerus sp., P. argentinus and P. guadulpensis occurred in similar periods, from December to March, with the exception of P.guadulpensis, that built one nest in October. Pachodynerus ca guadulpensis nested in March and P. nasidens from January to April. The nests of Pachodynerus species present a very similar architecture, comprising a linear series of cylindrical cells that fit perfectly into each other forming a continuous tube. With these results we were able to conclude that, even though Pachodynerus species present common characteristics, such as nest architecture, nesting activities and habitats in which they occur, the used resources, mortality rates, etc., vary among groups of species occurring in different regions.(AU)
O objetivo deste trabalho foi comparar aspectos biológicos das espécies de Pachodynerus que ocorrem no Parque Municipal das Araucárias, Guarapuava, Paraná, Sul do Brasil. Ele foi realizado de dezembro de 2001 a dezembro de 2004. Quarenta e um ninhos de cinco espécies foram coletados sendo 17 de Pachodynerus guadulpensis, 15 de Pachodynerus sp., um de Pachodynerus argentinus, um de Pachodynerus ca guadulpensis e sete de Pachodynerus nasidens. As nidificações de Pachodynerus sp., P. argentinus e P. guadulpensis ocorreram de dezembro a março, com exceção de P. guadulpensis, que construiu um ninho em outubro. Pachodynerus ca guadulpensis nidificou em março e P. nasidens de janeiro a abril. Os ninhos de todas as espécies de Pachodynerus apresentaram arquitetura similar, com uma série linear de células cilíndricas que se encaixam perfeitamente umas nas outras, formando um tubo contínuo. Pelos resultados deste estudo nós concluímos que, mesmo apresentando características em comum, como a arquitetura dos ninhos, atividades de nidificação e habitats onde ocorrem, os recursos usados pelas espécies de Pachodynerus bem como as suas taxas de mortalidades, etc., variam entre grupos de espécies que ocorrem em diferentes regiões.(AU)
Subject(s)
Hymenoptera/classification , Wasps/classificationABSTRACT
The aim of this study was to compare biological aspects of the Pachodynerus species occurring in the Parque Municipal das Araucárias, Guarapuava, Paraná, Southern Brazil. It was carried from December 2001 to December 2004. Forty one nests belonging to 5 species were collected, of which 17 Pachodynerus guadulpensis, 15 Pachodynerus sp., 1 Pachodynerus argentinus, 1 Pachodynerus ca guadulpensis and 7 Pachodynerus nasidens. The nesting activity of Pachodynerus sp., P. argentinus and P. guadulpensis occurred in similar periods, from December to March, with the exception of P.guadulpensis, that built one nest in October. Pachodynerus ca guadulpensis nested in March and P. nasidens from January to April. The nests of Pachodynerus species present a very similar architecture, comprising a linear series of cylindrical cells that fit perfectly into each other forming a continuous tube. With these results we were able to conclude that, even though Pachodynerus species present common characteristics, such as nest architecture, nesting activities and habitats in which they occur, the used resources, mortality rates, etc., vary among groups of species occurring in different regions.
O objetivo deste trabalho foi comparar aspectos biológicos das espécies de Pachodynerus que ocorrem no Parque Municipal das Araucárias, Guarapuava, Paraná, Sul do Brasil. Ele foi realizado de dezembro de 2001 a dezembro de 2004. Quarenta e um ninhos de cinco espécies foram coletados sendo 17 de Pachodynerus guadulpensis, 15 de Pachodynerus sp., um de Pachodynerus argentinus, um de Pachodynerus ca guadulpensis e sete de Pachodynerus nasidens. As nidificações de Pachodynerus sp., P. argentinus e P. guadulpensis ocorreram de dezembro a março, com exceção de P. guadulpensis, que construiu um ninho em outubro. Pachodynerus ca guadulpensis nidificou em março e P. nasidens de janeiro a abril. Os ninhos de todas as espécies de Pachodynerus apresentaram arquitetura similar, com uma série linear de células cilíndricas que se encaixam perfeitamente umas nas outras, formando um tubo contínuo. Pelos resultados deste estudo nós concluímos que, mesmo apresentando características em comum, como a arquitetura dos ninhos, atividades de nidificação e habitats onde ocorrem, os recursos usados pelas espécies de Pachodynerus bem como as suas taxas de mortalidades, etc., variam entre grupos de espécies que ocorrem em diferentes regiões.