Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela
Agave cocui (Agavaceae) is a species with broad distribution in arid and semiarid areas of Venezuela and Colombia. Despite of its ecological importance as a source of food for wildlife, and its economic value for production of a spirit drink, studies on the reproductive ecology of the species are re...
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| Formato: | Online |
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Universidad de Costa Rica
2011
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/3404 |
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RBT3404 |
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ojs |
| institution |
Universidad de Costa Rica |
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Revista de Biología Tropical |
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spa |
| format |
Online |
| author |
J. Figueredo, Carmen Luis Villegas, José M. Nassar, Jafet |
| spellingShingle |
J. Figueredo, Carmen Luis Villegas, José M. Nassar, Jafet Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| author_facet |
J. Figueredo, Carmen Luis Villegas, José M. Nassar, Jafet |
| author_sort |
J. Figueredo, Carmen |
| description |
Agave cocui (Agavaceae) is a species with broad distribution in arid and semiarid areas of Venezuela and Colombia. Despite of its ecological importance as a source of food for wildlife, and its economic value for production of a spirit drink, studies on the reproductive ecology of the species are relatively rare. In this study, we conducted a oneyear evaluation of the flowering and fruiting phenology of A. cocui in the eight representative localities of the species? distribution in Venezuela. Within each study site, we chose an area with a minimum of 50 reproductive individuals and followed their reproductive phenophases with the help of binoculars, using six qualitative cathegories (emerging reproductive stalk, flowers, inmature fruits, mature fruits, bulbils and dry stalk) every two months. Emergence of the reproductive stalk in most of the examined populations began in September (rainy season), although this event delayed two months in a few populations. We detected significant negative correlations between precipitation and the percentage of flowering occurrence in four of the eight populations. Floral resources are available for flower visitors during approximately five months of the year (January-May). In most populations production of flowers initiated in January (dry season), and for Western Venezuela and Andean regions, the flowering main peak occurred in January. Localities from the Central and Eastern Coast exhibited the flowering peak in March, showing a delay of approximately two months with respect to other populations. Beginning of fruit set varied among localities from January to May; however, peak production of mature fruits concentrated in May, and fruit occurrence varied broadly between 5.2 and 85%. Bulbil production was detected in all populations and varied greatly among them (maximum percentage per population: 26.19-92.10%). High flowering synchronicity (Phenophase Overlapping Index: 0.756 and 0.999) was observed among all populations monitored in Western Venezuela, including the Andean localities. This condition might facilitate the existence of a nectar corridor from the Western Coast and nearby islands, to the Andean arid patches, which could be potentially used by nectar-feeding bats and birds dependent on agave flowers during part of the year. |
| title |
Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| title_short |
Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| title_full |
Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| title_fullStr |
Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| title_full_unstemmed |
Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| title_sort |
sincronía reproductiva interpoblacional de agave cocui (agavaceae) en venezuela |
| title_alt |
Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela |
| publisher |
Universidad de Costa Rica |
| publishDate |
2011 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/3404 |
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AT jfigueredocarmen sincroniareproductivainterpoblacionaldeagavecocuiagavaceaeenvenezuela AT luisvillegasjose sincroniareproductivainterpoblacionaldeagavecocuiagavaceaeenvenezuela AT mnassarjafet sincroniareproductivainterpoblacionaldeagavecocuiagavaceaeenvenezuela |
| _version_ |
1810114513363533824 |
| spelling |
RBT34042022-06-06T18:58:21Z Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela Sincronía reproductiva interpoblacional de Agave cocui (Agavaceae) en Venezuela J. Figueredo, Carmen Luis Villegas, José M. Nassar, Jafet Agavaceae arid zone flowering nectar corridors reproductive synchrony corredor de néctar floración sincronía reproductiva zonas áridas Agave cocui(Agavaceae) is a species with broad distribution in arid and semiarid areas of Venezuela and Colombia. Despite of its ecological importance as a source of food for wildlife, and its economic value for production of a spirit drink, studies on the reproductive ecology of the species are relatively rare. In this study, we conducted a one-year evaluation of the flowering and fruiting phenology of A. cocui in the eight representative localities of the species’ distribution in Venezuela. Within each study site, we chose an area with a minimum of 50 reproduc-tive individuals and followed their reproductive phenophases with the help of binoculars, using six qualitative cathegories (emerging reproductive stalk, flowers, inmature fruits, mature fruits, bulbils and dry stalk) every two months. Emergence of the reproductive stalk in most of the examined populations began in September (rainy season), although this event delayed two months in a few populations. We detected significant negative correlations between precipitation and the percentage of flowering occurrence in four of the eight populations. Floral resources are available for flower visitors during approximately five months of the year (January-May). In most populations production of flowers initiated in January (dry season), and for Western Venezuela and Andean regions, the flowering main peak occurred in January. Localities from the Central and Eastern Coast exhibited the flowering peak in March, showing a delay of approximately two months with respect to other populations. Beginning of fruit set varied among localities from January to May; however, peak production of mature fruits concentrated in May, and fruit occurrence varied broadly between 5.2 and 85%. Bulbil production was detected in all populations and varied greatly among them (maximum percentage per population: 26.19-92.10%). High flowering synchronicity (Phenophase Overlapping Index: 0.756 and 0.999) was observed among all populations monitored in Western Venezuela, including the Andean localities. This condition might facilitate the existence of a nectar corridor from the Western Coast and nearby islands, to the Andean arid patches, which could be potentially used by nectar-feeding bats and birds dependent on agave flowers during part of the year. Agave cocui (Agavaceae) is a species with broad distribution in arid and semiarid areas of Venezuela and Colombia. Despite of its ecological importance as a source of food for wildlife, and its economic value for production of a spirit drink, studies on the reproductive ecology of the species are relatively rare. In this study, we conducted a oneyear evaluation of the flowering and fruiting phenology of A. cocui in the eight representative localities of the species? distribution in Venezuela. Within each study site, we chose an area with a minimum of 50 reproductive individuals and followed their reproductive phenophases with the help of binoculars, using six qualitative cathegories (emerging reproductive stalk, flowers, inmature fruits, mature fruits, bulbils and dry stalk) every two months. Emergence of the reproductive stalk in most of the examined populations began in September (rainy season), although this event delayed two months in a few populations. We detected significant negative correlations between precipitation and the percentage of flowering occurrence in four of the eight populations. Floral resources are available for flower visitors during approximately five months of the year (January-May). In most populations production of flowers initiated in January (dry season), and for Western Venezuela and Andean regions, the flowering main peak occurred in January. Localities from the Central and Eastern Coast exhibited the flowering peak in March, showing a delay of approximately two months with respect to other populations. Beginning of fruit set varied among localities from January to May; however, peak production of mature fruits concentrated in May, and fruit occurrence varied broadly between 5.2 and 85%. Bulbil production was detected in all populations and varied greatly among them (maximum percentage per population: 26.19-92.10%). High flowering synchronicity (Phenophase Overlapping Index: 0.756 and 0.999) was observed among all populations monitored in Western Venezuela, including the Andean localities. This condition might facilitate the existence of a nectar corridor from the Western Coast and nearby islands, to the Andean arid patches, which could be potentially used by nectar-feeding bats and birds dependent on agave flowers during part of the year. Universidad de Costa Rica 2011-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/3404 10.15517/rbt.v0i0.3404 Revista de Biología Tropical; Vol. 59 No. 3 (2011): Volume 59 – Regular number 3 – September 2011; 1359–1370 Revista de Biología Tropical; Vol. 59 Núm. 3 (2011): Volumen 59 – Número regular 3 – Setiembre 2011; 1359–1370 Revista Biología Tropical; Vol. 59 N.º 3 (2011): Volume 59 – Regular number 3 – September 2011; 1359–1370 2215-2075 0034-7744 10.15517/rbt.v0i0 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/3404/3308 Copyright (c) 2011 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |