Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil
Sexual maturation and ovarian activity were studied in #Rhammatocerus schistocercoides# (Rehn, 1906) under natural conditions in the state of Mato Grosso in Brazil, a recognized outbreak area of this species. The end of the dry season marks the onset of sexual maturation, which could be assiociated vith the photoperiod but not with the arrival of the ist rains. This means that sexual maturation, although triggered at a set date, progresses under highly varied ecological conditions. This must have an important impact on ovarian activity and thus on the quantity of the eggs laid. Interannual fire and precipitation variations could modify population levels (through effects on ovarian activity, and also on the einbryonic development success rate) and explain the utbreak cycles. Vitellogenesis failures were noted by frequentlv marked oocyte resorptions; an indication that the environmental conditions are not always optimal for egg maturation. Conditions during this study, at the beginning of the 1994-1995 rainv season, were not entirely favorable because ovarian yield was only 59%. Pseudocorpora lutea were noted at the base of the ovarian pedicels, which has toour knowledge never been reported. They slightly complicated the current study and have been a source of confusion in the past.
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Format: | article biblioteca |
Language: | eng |
Subjects: | H10 - Ravageurs des plantes, L50 - Physiologie et biochimie animales, Rhammatocerus, maturité sexuelle, ovaire, performance de ponte, performance de reproduction, http://aims.fao.org/aos/agrovoc/c_36335, http://aims.fao.org/aos/agrovoc/c_7016, http://aims.fao.org/aos/agrovoc/c_5456, http://aims.fao.org/aos/agrovoc/c_4234, http://aims.fao.org/aos/agrovoc/c_6510, http://aims.fao.org/aos/agrovoc/c_1070, http://aims.fao.org/aos/agrovoc/c_4650, |
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dig-cirad-fr-3897812024-01-27T23:04:07Z http://agritrop.cirad.fr/389781/ http://agritrop.cirad.fr/389781/ Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil. Launois-Luong My-Hanh, Lecoq Michel. 1996. Environmental Entomology (25) : 1045-1051.https://doi.org/10.1093/ee/25.5.1045 <https://doi.org/10.1093/ee/25.5.1045> Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil Launois-Luong, My-Hanh Lecoq, Michel eng 1996 Environmental Entomology H10 - Ravageurs des plantes L50 - Physiologie et biochimie animales Rhammatocerus maturité sexuelle ovaire performance de ponte performance de reproduction http://aims.fao.org/aos/agrovoc/c_36335 http://aims.fao.org/aos/agrovoc/c_7016 http://aims.fao.org/aos/agrovoc/c_5456 http://aims.fao.org/aos/agrovoc/c_4234 http://aims.fao.org/aos/agrovoc/c_6510 Brésil Mato Grosso http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_4650 Sexual maturation and ovarian activity were studied in #Rhammatocerus schistocercoides# (Rehn, 1906) under natural conditions in the state of Mato Grosso in Brazil, a recognized outbreak area of this species. The end of the dry season marks the onset of sexual maturation, which could be assiociated vith the photoperiod but not with the arrival of the ist rains. This means that sexual maturation, although triggered at a set date, progresses under highly varied ecological conditions. This must have an important impact on ovarian activity and thus on the quantity of the eggs laid. Interannual fire and precipitation variations could modify population levels (through effects on ovarian activity, and also on the einbryonic development success rate) and explain the utbreak cycles. Vitellogenesis failures were noted by frequentlv marked oocyte resorptions; an indication that the environmental conditions are not always optimal for egg maturation. Conditions during this study, at the beginning of the 1994-1995 rainv season, were not entirely favorable because ovarian yield was only 59%. Pseudocorpora lutea were noted at the base of the ovarian pedicels, which has toour knowledge never been reported. They slightly complicated the current study and have been a source of confusion in the past. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/closedAccess https://doi.org/10.1093/ee/25.5.1045 10.1093/ee/25.5.1045 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=89545 info:eu-repo/semantics/altIdentifier/doi/10.1093/ee/25.5.1045 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1093/ee/25.5.1045 |
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H10 - Ravageurs des plantes L50 - Physiologie et biochimie animales Rhammatocerus maturité sexuelle ovaire performance de ponte performance de reproduction http://aims.fao.org/aos/agrovoc/c_36335 http://aims.fao.org/aos/agrovoc/c_7016 http://aims.fao.org/aos/agrovoc/c_5456 http://aims.fao.org/aos/agrovoc/c_4234 http://aims.fao.org/aos/agrovoc/c_6510 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_4650 H10 - Ravageurs des plantes L50 - Physiologie et biochimie animales Rhammatocerus maturité sexuelle ovaire performance de ponte performance de reproduction http://aims.fao.org/aos/agrovoc/c_36335 http://aims.fao.org/aos/agrovoc/c_7016 http://aims.fao.org/aos/agrovoc/c_5456 http://aims.fao.org/aos/agrovoc/c_4234 http://aims.fao.org/aos/agrovoc/c_6510 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_4650 |
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H10 - Ravageurs des plantes L50 - Physiologie et biochimie animales Rhammatocerus maturité sexuelle ovaire performance de ponte performance de reproduction http://aims.fao.org/aos/agrovoc/c_36335 http://aims.fao.org/aos/agrovoc/c_7016 http://aims.fao.org/aos/agrovoc/c_5456 http://aims.fao.org/aos/agrovoc/c_4234 http://aims.fao.org/aos/agrovoc/c_6510 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_4650 H10 - Ravageurs des plantes L50 - Physiologie et biochimie animales Rhammatocerus maturité sexuelle ovaire performance de ponte performance de reproduction http://aims.fao.org/aos/agrovoc/c_36335 http://aims.fao.org/aos/agrovoc/c_7016 http://aims.fao.org/aos/agrovoc/c_5456 http://aims.fao.org/aos/agrovoc/c_4234 http://aims.fao.org/aos/agrovoc/c_6510 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_4650 Launois-Luong, My-Hanh Lecoq, Michel Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil |
description |
Sexual maturation and ovarian activity were studied in #Rhammatocerus schistocercoides# (Rehn, 1906) under natural conditions in the state of Mato Grosso in Brazil, a recognized outbreak area of this species. The end of the dry season marks the onset of sexual maturation, which could be assiociated vith the photoperiod but not with the arrival of the ist rains. This means that sexual maturation, although triggered at a set date, progresses under highly varied ecological conditions. This must have an important impact on ovarian activity and thus on the quantity of the eggs laid. Interannual fire and precipitation variations could modify population levels (through effects on ovarian activity, and also on the einbryonic development success rate) and explain the utbreak cycles. Vitellogenesis failures were noted by frequentlv marked oocyte resorptions; an indication that the environmental conditions are not always optimal for egg maturation. Conditions during this study, at the beginning of the 1994-1995 rainv season, were not entirely favorable because ovarian yield was only 59%. Pseudocorpora lutea were noted at the base of the ovarian pedicels, which has toour knowledge never been reported. They slightly complicated the current study and have been a source of confusion in the past. |
format |
article |
topic_facet |
H10 - Ravageurs des plantes L50 - Physiologie et biochimie animales Rhammatocerus maturité sexuelle ovaire performance de ponte performance de reproduction http://aims.fao.org/aos/agrovoc/c_36335 http://aims.fao.org/aos/agrovoc/c_7016 http://aims.fao.org/aos/agrovoc/c_5456 http://aims.fao.org/aos/agrovoc/c_4234 http://aims.fao.org/aos/agrovoc/c_6510 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_4650 |
author |
Launois-Luong, My-Hanh Lecoq, Michel |
author_facet |
Launois-Luong, My-Hanh Lecoq, Michel |
author_sort |
Launois-Luong, My-Hanh |
title |
Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil |
title_short |
Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil |
title_full |
Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil |
title_fullStr |
Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil |
title_full_unstemmed |
Sexual maturation and ovarian activity in Rhammatocerus schistocercoides (Orthoptera : Acrididae) a pest grasshopper in the State of Mato Grosso in Brazil |
title_sort |
sexual maturation and ovarian activity in rhammatocerus schistocercoides (orthoptera : acrididae) a pest grasshopper in the state of mato grosso in brazil |
url |
http://agritrop.cirad.fr/389781/ |
work_keys_str_mv |
AT launoisluongmyhanh sexualmaturationandovarianactivityinrhammatocerusschistocercoidesorthopteraacrididaeapestgrasshopperinthestateofmatogrossoinbrazil AT lecoqmichel sexualmaturationandovarianactivityinrhammatocerusschistocercoidesorthopteraacrididaeapestgrasshopperinthestateofmatogrossoinbrazil |
_version_ |
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