On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period
Main Author: | |
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Publication Date: | 1997 |
Other Authors: | , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://dx.doi.org/10.1590/S0101-81751997000300018 http://hdl.handle.net/11449/28321 |
Summary: | Observations of the developmental biology of Loxosceles gaucho Gertsch, 1967, the brown spider of southeastern Brazil are scarce. The present study reports the method of individualized rearing of 18 populations of L. gaucho, kept in laboratory under varied diet conditions, and characterizes their nympho-imaginal period as well as factors related to their reproduction. Females built the first egg sac about 20 days after copulation and nymphs hatched 40 days after the laying date. Average offspring was 61.3 spiderlings and females usually built three to four successive egg sacs in a period of five to seven months. First nymphs initiated their predatory activity between the 5th and 8th days after hatching and the majority reached adulthood within six moults (range of five to eight) in approximately 15 to 17 months (male) and 15.5 to 18 months (female). The average sex ratio equaled 1.0:1.7 (male:female). The wide individual variability of this species intermoult intervals is herewith expressed by the intermoult rate, which was fairly uniform for both intra and interpopulations and gives a relevant aspect for a general idea of the life cycles of spiders. |
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On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal periodBrown spiderLoxosceles gauchoSicariidaedevelopmentObservations of the developmental biology of Loxosceles gaucho Gertsch, 1967, the brown spider of southeastern Brazil are scarce. The present study reports the method of individualized rearing of 18 populations of L. gaucho, kept in laboratory under varied diet conditions, and characterizes their nympho-imaginal period as well as factors related to their reproduction. Females built the first egg sac about 20 days after copulation and nymphs hatched 40 days after the laying date. Average offspring was 61.3 spiderlings and females usually built three to four successive egg sacs in a period of five to seven months. First nymphs initiated their predatory activity between the 5th and 8th days after hatching and the majority reached adulthood within six moults (range of five to eight) in approximately 15 to 17 months (male) and 15.5 to 18 months (female). The average sex ratio equaled 1.0:1.7 (male:female). The wide individual variability of this species intermoult intervals is herewith expressed by the intermoult rate, which was fairly uniform for both intra and interpopulations and gives a relevant aspect for a general idea of the life cycles of spiders.Fundação para o Desenvolvimento da UNESP (FUNDUNESP)Universidade Estadual Paulista Instituto de Biociências Departamento de ZoologiaUniversidade Estadual Paulista Faculdade de Ciências Agranômicas Departamento de Defesa FitossanitáriaUniversidade Estadual Paulista Instituto de Biociências Departamento de ZoologiaUniversidade Estadual Paulista Faculdade de Ciências Agranômicas Departamento de Defesa FitossanitáriaSociedade Brasileira de ZoologiaUniversidade Estadual Paulista (Unesp)Rinaldi, Isabela M.P [UNESP]Forti, Luiz Carlos [UNESP]Stropa, André A [UNESP]2014-05-20T15:12:14Z2014-05-20T15:12:14Z1997-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article697-706application/pdfhttp://dx.doi.org/10.1590/S0101-81751997000300018Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 14, n. 3, p. 697-706, 1997.0101-8175http://hdl.handle.net/11449/2832110.1590/S0101-81751997000300018S0101-81751997000300018S0101-81751997000300018.pdf6187684824965648SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Zoologiainfo:eu-repo/semantics/openAccess2023-11-10T06:11:20Zoai:repositorio.unesp.br:11449/28321Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-10T06:11:20Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
title |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
spellingShingle |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period Rinaldi, Isabela M.P [UNESP] Brown spider Loxosceles gaucho Sicariidae development |
title_short |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
title_full |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
title_fullStr |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
title_full_unstemmed |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
title_sort |
On the development of the brown spider Loxosceles gaucho Gertsch (Araneae, Sicariidae): the nympho-imaginal period |
author |
Rinaldi, Isabela M.P [UNESP] |
author_facet |
Rinaldi, Isabela M.P [UNESP] Forti, Luiz Carlos [UNESP] Stropa, André A [UNESP] |
author_role |
author |
author2 |
Forti, Luiz Carlos [UNESP] Stropa, André A [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Rinaldi, Isabela M.P [UNESP] Forti, Luiz Carlos [UNESP] Stropa, André A [UNESP] |
dc.subject.por.fl_str_mv |
Brown spider Loxosceles gaucho Sicariidae development |
topic |
Brown spider Loxosceles gaucho Sicariidae development |
description |
Observations of the developmental biology of Loxosceles gaucho Gertsch, 1967, the brown spider of southeastern Brazil are scarce. The present study reports the method of individualized rearing of 18 populations of L. gaucho, kept in laboratory under varied diet conditions, and characterizes their nympho-imaginal period as well as factors related to their reproduction. Females built the first egg sac about 20 days after copulation and nymphs hatched 40 days after the laying date. Average offspring was 61.3 spiderlings and females usually built three to four successive egg sacs in a period of five to seven months. First nymphs initiated their predatory activity between the 5th and 8th days after hatching and the majority reached adulthood within six moults (range of five to eight) in approximately 15 to 17 months (male) and 15.5 to 18 months (female). The average sex ratio equaled 1.0:1.7 (male:female). The wide individual variability of this species intermoult intervals is herewith expressed by the intermoult rate, which was fairly uniform for both intra and interpopulations and gives a relevant aspect for a general idea of the life cycles of spiders. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-09-01 2014-05-20T15:12:14Z 2014-05-20T15:12:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0101-81751997000300018 Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 14, n. 3, p. 697-706, 1997. 0101-8175 http://hdl.handle.net/11449/28321 10.1590/S0101-81751997000300018 S0101-81751997000300018 S0101-81751997000300018.pdf 6187684824965648 |
url |
http://dx.doi.org/10.1590/S0101-81751997000300018 http://hdl.handle.net/11449/28321 |
identifier_str_mv |
Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 14, n. 3, p. 697-706, 1997. 0101-8175 10.1590/S0101-81751997000300018 S0101-81751997000300018 S0101-81751997000300018.pdf 6187684824965648 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira de Zoologia |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
697-706 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797789664546914304 |