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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
07/02/2017 |
Actualizado : |
10/04/2017 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Nacionales |
Autor : |
ZERBINO, M.S.; LORIER, E.; MIGUEL, L. |
Afiliación : |
MARIA STELLA ZERBINO BARDIER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ESTRELLITA LORIER, Universidad de la República (UdelaR)/ Facultad de Ciencias; LUCIA MIGUEL GONZALEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Variabilidad interanual en comunidades de acridios (Orthoptera: Caelifera: Acridoidea) en la región centro-sur del Uruguay. (Interannual Variability in Acridian Community (Orthoptera: Caelifera: Acrididae) in Central-southern Uruguay). |
Fecha de publicación : |
2016 |
Fuente / Imprenta : |
Agrociencia Uruguay, 2016, v.20 (2), p.74-85. |
Idioma : |
Español |
Contenido : |
RESUMEN.
Los acridios (Orthoptera: Caelifera: Acridoidea) son insectos nativos que habitan pastizales en Uruguay. En ciertas ocasiones incrementan la abundancia exponencialmente, como en los años 1950´ y en 2008/09, causando importantes pérdidas económicas. Este trabajo tuvo como objetivo describir la variación interanual de la abundancia y diversidad de las comunidades que habitan pastizales de la región centro-sur. El seguimiento de las poblaciones se realizó durante cinco temporadas, en sitios de Florida y Durazno. Se estimaron: riqueza acumulada y específica por sitio (S), índices de diversidad de ShannonWeiner (H´), equitatividad de Pielou (J´), similitud cualitativa de Sorensen (Is), constancia de presencia (C), y abundancia total (A), específica absoluta y relativa. A través de las variaciones temporales de dichos descriptores comunitarios se identificaron y caracterizaron períodos de explosión poblacional, transición y equilibrio. En 2009/10 (explosión poblacional) S, A, e Is fueron máximos, J? y H? bajos y Borellia bruneri (Rehn, 1906) fue la más abundante. El período 2010/11-2011/12 (transición), se caracterizó porque J´ e Is fueron intermedias, A y S bajas, y continuó el predominio de B. bruneri. Durante 2012/13 y 2013/14 (equilibrio), se registraron los más altos J´ y H´, y la abundancia relativa de B. bruneri disminuyó significativamente. En este período Scotussa lemniscata (Stål, 1861) fue predominante. Los resultados obtenidos indican que en pastizales de la región centrosur
del Uruguay, el predominio de B. bruneri, la disminución en J´ y el aumento de Is serían indicadores de un período de transición hacia una explosión poblacional.
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SUMMARY
Acridians (Orthoptera: Caelifera: Acrididae) are native insects that inhabit Uruguayan grasslands. Occasionally, abundance increases exponentially, as in the 1950' and in 2008/09, causing significant economic losses. This work aimed to describe the variation in the abundance and diversity of the communities that inhabit the grasslands of south-central region. Acridian populations were monitored during five seasons in Florida and Durazno sites. Cumulative and site-specific (S) richness,
Shannon-Weiner (H ?) diversity index, Pielou evenness (J?), qualitative similarity of Sorensen (Is), constance of presence (C), total abundance (A), and absolute and relative specific abundance were estimated. Based on these community descriptors and their temporal variations, we identified and characterized outbreak, transition and non-outbreak periods. In 2009/10 (outbreak) S, A, and Is , were highest, J ? and H? were low, and Borellia bruneri (Rehn, 1906) was the most abundant species.
The 2010/11 -2011/12 period (transition), was characterized by intermediate J? and Is , low A and S, and B. bruneri remained predominant. During 2012/13 and 2013/14 (equilibrium), higher values of J ?and H?, and low values of A, S and Is were recorded, and the relative abundance of B. bruneri decreased significantly. In this period Scotussa lemniscata (Stål, 1861) was the predominant species. These results indicate that in the grasslands of south-central region of Uruguay, the prevalence
of B. bruneri, the decrease in J? and increase in Is , would be indicators of a transition period to an outbreak. MenosRESUMEN.
Los acridios (Orthoptera: Caelifera: Acridoidea) son insectos nativos que habitan pastizales en Uruguay. En ciertas ocasiones incrementan la abundancia exponencialmente, como en los años 1950´ y en 2008/09, causando importantes pérdidas económicas. Este trabajo tuvo como objetivo describir la variación interanual de la abundancia y diversidad de las comunidades que habitan pastizales de la región centro-sur. El seguimiento de las poblaciones se realizó durante cinco temporadas, en sitios de Florida y Durazno. Se estimaron: riqueza acumulada y específica por sitio (S), índices de diversidad de ShannonWeiner (H´), equitatividad de Pielou (J´), similitud cualitativa de Sorensen (Is), constancia de presencia (C), y abundancia total (A), específica absoluta y relativa. A través de las variaciones temporales de dichos descriptores comunitarios se identificaron y caracterizaron períodos de explosión poblacional, transición y equilibrio. En 2009/10 (explosión poblacional) S, A, e Is fueron máximos, J? y H? bajos y Borellia bruneri (Rehn, 1906) fue la más abundante. El período 2010/11-2011/12 (transición), se caracterizó porque J´ e Is fueron intermedias, A y S bajas, y continuó el predominio de B. bruneri. Durante 2012/13 y 2013/14 (equilibrio), se registraron los más altos J´ y H´, y la abundancia relativa de B. bruneri disminuyó significativamente. En este período Scotussa lemniscata (Stål, 1861) fue predominante. Los resultados obtenidos indican que en pastizales de la... Presentar Todo |
Palabras claves : |
BORELLIA BRUNERI; EXPLOSIÓN POBLACIONAL; GRASSHOPPER; GRASSLANDS; TEMPORAL VARIATION; TUCURAS; VARIACIÓN TEMPORAL. |
Thesagro : |
PASTIZALES; PASTURAS. |
Asunto categoría : |
-- |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/6469/1/Agrociencia-2016-v.20-2-p.74-85-Zerbino-M.S..pdf
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Marc : |
LEADER 04199naa a2200253 a 4500 001 1056643 005 2017-04-10 008 2016 bl uuuu u00u1 u #d 100 1 $aZERBINO, M.S. 245 $aVariabilidad interanual en comunidades de acridios (Orthoptera$bCaelifera: Acridoidea) en la región centro-sur del Uruguay. (Interannual Variability in Acridian Community (Orthoptera: Caelifera: Acrididae) in Central-southern Uruguay).$h[electronic resource] 260 $c2016 520 $aRESUMEN. Los acridios (Orthoptera: Caelifera: Acridoidea) son insectos nativos que habitan pastizales en Uruguay. En ciertas ocasiones incrementan la abundancia exponencialmente, como en los años 1950´ y en 2008/09, causando importantes pérdidas económicas. Este trabajo tuvo como objetivo describir la variación interanual de la abundancia y diversidad de las comunidades que habitan pastizales de la región centro-sur. El seguimiento de las poblaciones se realizó durante cinco temporadas, en sitios de Florida y Durazno. Se estimaron: riqueza acumulada y específica por sitio (S), índices de diversidad de ShannonWeiner (H´), equitatividad de Pielou (J´), similitud cualitativa de Sorensen (Is), constancia de presencia (C), y abundancia total (A), específica absoluta y relativa. A través de las variaciones temporales de dichos descriptores comunitarios se identificaron y caracterizaron períodos de explosión poblacional, transición y equilibrio. En 2009/10 (explosión poblacional) S, A, e Is fueron máximos, J? y H? bajos y Borellia bruneri (Rehn, 1906) fue la más abundante. El período 2010/11-2011/12 (transición), se caracterizó porque J´ e Is fueron intermedias, A y S bajas, y continuó el predominio de B. bruneri. Durante 2012/13 y 2013/14 (equilibrio), se registraron los más altos J´ y H´, y la abundancia relativa de B. bruneri disminuyó significativamente. En este período Scotussa lemniscata (Stål, 1861) fue predominante. Los resultados obtenidos indican que en pastizales de la región centrosur del Uruguay, el predominio de B. bruneri, la disminución en J´ y el aumento de Is serían indicadores de un período de transición hacia una explosión poblacional. .-.-.-.-.-.-.-.-.-.-.-.-. SUMMARY Acridians (Orthoptera: Caelifera: Acrididae) are native insects that inhabit Uruguayan grasslands. Occasionally, abundance increases exponentially, as in the 1950' and in 2008/09, causing significant economic losses. This work aimed to describe the variation in the abundance and diversity of the communities that inhabit the grasslands of south-central region. Acridian populations were monitored during five seasons in Florida and Durazno sites. Cumulative and site-specific (S) richness, Shannon-Weiner (H ?) diversity index, Pielou evenness (J?), qualitative similarity of Sorensen (Is), constance of presence (C), total abundance (A), and absolute and relative specific abundance were estimated. Based on these community descriptors and their temporal variations, we identified and characterized outbreak, transition and non-outbreak periods. In 2009/10 (outbreak) S, A, and Is , were highest, J ? and H? were low, and Borellia bruneri (Rehn, 1906) was the most abundant species. The 2010/11 -2011/12 period (transition), was characterized by intermediate J? and Is , low A and S, and B. bruneri remained predominant. During 2012/13 and 2013/14 (equilibrium), higher values of J ?and H?, and low values of A, S and Is were recorded, and the relative abundance of B. bruneri decreased significantly. In this period Scotussa lemniscata (Stål, 1861) was the predominant species. These results indicate that in the grasslands of south-central region of Uruguay, the prevalence of B. bruneri, the decrease in J? and increase in Is , would be indicators of a transition period to an outbreak. 650 $aPASTIZALES 650 $aPASTURAS 653 $aBORELLIA BRUNERI 653 $aEXPLOSIÓN POBLACIONAL 653 $aGRASSHOPPER 653 $aGRASSLANDS 653 $aTEMPORAL VARIATION 653 $aTUCURAS 653 $aVARIACIÓN TEMPORAL 700 1 $aLORIER, E. 700 1 $aMIGUEL, L. 773 $tAgrociencia Uruguay, 2016$gv.20 (2), p.74-85.
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INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
Fecha actual : |
09/09/2014 |
Actualizado : |
04/02/2020 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
CHANVALLON, A.; BLACHE, D.; CHADWICK, A.; ESMAILI, T.; HAWKEN, P.A.R.; MARTIN, G.B.; VIÑOLES, C.; FABRE-NYS, C. |
Afiliación : |
A. CHANVALLON, Centre Interrégional d’Information et de Recherche en Production Ovine, Site Expérimental du Mourier, 87800 St Priest Ligoure, FranceUMR 6175 INRA Physiologie de la Reproduction et des Comportements - CNRS - Université de Tours - Haras Nationaux, 37380; D. BLACHE, UWA Institute of Agriculture, The University of Western Australia, Crawley 6009, Perth, Australia; A. CHADWICK, UWA Institute of Agriculture, The University of Western Australia, Crawley 6009, Perth, Australia; T. ESMAILI, UWA Institute of Agriculture, The University of Western Australia, Crawley 6009, Perth, Australia; P.A.R. HAWKEN, UWA Institute of Agriculture, The University of Western Australia, Crawley 6009, Perth, Australia; G.B. MARTIN, UWA Institute of Agriculture, The University of Western Australia, Crawley 6009, Perth, Australia; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; UWA Institute of Agriculture, The University of Western Australia, Crawley 6009, Perth, Australia; C. FABRE-NYS, UMR 6175 INRA Physiologie de la Reproduction et des Comportements - CNRS - Université de Tours - Haras Nationaux, 37380 Nouzilly, France. |
Título : |
Sexual experience and temperament affect the response of Merino ewes to the ram effect during the anoestrous season. |
Fecha de publicación : |
2010 |
Fuente / Imprenta : |
Animal Reproduction Science, 2010, v. 119, p. 205-211. |
DOI : |
10.1016/j.anireprosci.2010.02.003 |
Idioma : |
Inglés |
Notas : |
Article history: Received 26 October 2009 // Received in revised form 11 January 2010 // Accepted 4 February 2010 // Available online 11 February 2010. Corresponding author at: : Audrey.Chanvallon@tours.inra.fr // Acknowledgments: This research was supported by the Australian Research Council (Project DP0558952) and by Meat & Livestock Australia (Project MS027 ?LambMax?). We thank Steve Gray for his assistance in the care and management of the animals, and Margaret Blackberry for her assistance with the hormone assays. This work was a part of Audrey Chanvallon?s PhD project and was supported by CIFRE Convention and the ANRT. We thank also the Région Centre. |
Contenido : |
Abstract: In seasonally anoestrous ewes of many breeds, the introduction of rams triggers an increase in gonadotrophin secretion that induces ovulation, a phenomenon known as the ram effect. The ram effect is a practical method for mating ewes outside the natural breeding season, and also can provide synchronised lambing, but the variability of the response, especially in young animals, reduces its potential for widespread application. The aim of our study was to assess two factors that are thought to contribute to the variability in young ewes: temperament and sexual experience. We used anovulatory ewes from a flock that had been genetically selected for calm or nervous temperament and compared the endocrine and ovarian responses to the ram effect in four groups (each n = 15): calm and parous (3-6 years old); calm and nulliparous (2 years old); nervous and parous; and nervous and nulliparous. Parous ewes, independently of their temperament, exhibited a faster endocrine response and a higher proportion of females cycling after ram introduction than nulliparous ewes. Nervous ewes exhibited a higher proportion of females cycling after ram introduction than calm ewes, but only in the nulliparous group. We conclude that temperament exerts little influence on the response to the ram effect in sexually experienced ewes, and that females of nervous temperament appear to respond better when sexually naive. Both sexual experience and temperament need to be taken into consideration when flock management involves the ram effect. Finally, some ewes were cyclic at ram introduction, yet exhibited an increase in LH secretion even in the presence of high concentrations of progesterone. The mechanism by which the inhibitory effect of progesterone on LH secretion was bypassed needs to be clarified. MenosAbstract: In seasonally anoestrous ewes of many breeds, the introduction of rams triggers an increase in gonadotrophin secretion that induces ovulation, a phenomenon known as the ram effect. The ram effect is a practical method for mating ewes outside the natural breeding season, and also can provide synchronised lambing, but the variability of the response, especially in young animals, reduces its potential for widespread application. The aim of our study was to assess two factors that are thought to contribute to the variability in young ewes: temperament and sexual experience. We used anovulatory ewes from a flock that had been genetically selected for calm or nervous temperament and compared the endocrine and ovarian responses to the ram effect in four groups (each n = 15): calm and parous (3-6 years old); calm and nulliparous (2 years old); nervous and parous; and nervous and nulliparous. Parous ewes, independently of their temperament, exhibited a faster endocrine response and a higher proportion of females cycling after ram introduction than nulliparous ewes. Nervous ewes exhibited a higher proportion of females cycling after ram introduction than calm ewes, but only in the nulliparous group. We conclude that temperament exerts little influence on the response to the ram effect in sexually experienced ewes, and that females of nervous temperament appear to respond better when sexually naive. Both sexual experience and temperament need to be taken into consideration wh... Presentar Todo |
Palabras claves : |
CYCLICITY; EXPERIENCE; MALE EFFECT; REPRODUCCIÓN; SHEEP; TEMPERAMENT. |
Thesagro : |
OVINOS. |
Asunto categoría : |
L01 Ganadería |
Marc : |
LEADER 03332naa a2200313 a 4500 001 1050084 005 2020-02-04 008 2010 bl uuuu u00u1 u #d 024 7 $a10.1016/j.anireprosci.2010.02.003$2DOI 100 1 $aCHANVALLON, A. 245 $aSexual experience and temperament affect the response of Merino ewes to the ram effect during the anoestrous season. 260 $c2010 500 $aArticle history: Received 26 October 2009 // Received in revised form 11 January 2010 // Accepted 4 February 2010 // Available online 11 February 2010. Corresponding author at: : Audrey.Chanvallon@tours.inra.fr // Acknowledgments: This research was supported by the Australian Research Council (Project DP0558952) and by Meat & Livestock Australia (Project MS027 ?LambMax?). We thank Steve Gray for his assistance in the care and management of the animals, and Margaret Blackberry for her assistance with the hormone assays. This work was a part of Audrey Chanvallon?s PhD project and was supported by CIFRE Convention and the ANRT. We thank also the Région Centre. 520 $aAbstract: In seasonally anoestrous ewes of many breeds, the introduction of rams triggers an increase in gonadotrophin secretion that induces ovulation, a phenomenon known as the ram effect. The ram effect is a practical method for mating ewes outside the natural breeding season, and also can provide synchronised lambing, but the variability of the response, especially in young animals, reduces its potential for widespread application. The aim of our study was to assess two factors that are thought to contribute to the variability in young ewes: temperament and sexual experience. We used anovulatory ewes from a flock that had been genetically selected for calm or nervous temperament and compared the endocrine and ovarian responses to the ram effect in four groups (each n = 15): calm and parous (3-6 years old); calm and nulliparous (2 years old); nervous and parous; and nervous and nulliparous. Parous ewes, independently of their temperament, exhibited a faster endocrine response and a higher proportion of females cycling after ram introduction than nulliparous ewes. Nervous ewes exhibited a higher proportion of females cycling after ram introduction than calm ewes, but only in the nulliparous group. We conclude that temperament exerts little influence on the response to the ram effect in sexually experienced ewes, and that females of nervous temperament appear to respond better when sexually naive. Both sexual experience and temperament need to be taken into consideration when flock management involves the ram effect. Finally, some ewes were cyclic at ram introduction, yet exhibited an increase in LH secretion even in the presence of high concentrations of progesterone. The mechanism by which the inhibitory effect of progesterone on LH secretion was bypassed needs to be clarified. 650 $aOVINOS 653 $aCYCLICITY 653 $aEXPERIENCE 653 $aMALE EFFECT 653 $aREPRODUCCIÓN 653 $aSHEEP 653 $aTEMPERAMENT 700 1 $aBLACHE, D. 700 1 $aCHADWICK, A. 700 1 $aESMAILI, T. 700 1 $aHAWKEN, P.A.R. 700 1 $aMARTIN, G.B. 700 1 $aVIÑOLES, C. 700 1 $aFABRE-NYS, C. 773 $tAnimal Reproduction Science, 2010$gv. 119, p. 205-211.
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