Diazacon Inhibits Reproduction in Invasive Monk Parakeet Populations

Avery, Michael L.; Yoder, Christi A.; Tillman, Eric A.

doi:10.2193/2007-391

Cited by 40 publications

(37 citation statements)

References 8 publications

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“…The cholesterol mimic DiazaCon can affect reproduction in birds and mammals because it inhibits production of cholesterol, which is a parent compound of male and female reproductive steroids (Fagerstone et al 2010). Following ingestion of DiazaCon for 1-2 weeks, reproduction was suppressed for a few months in black-tailed prairie dogs, roseringed parakeets (Psittacula krameri) and monk parakeets (Myiopsitta monachus) (Nash et al 2007;Yoder et al 2007Yoder et al , 2011Avery et al 2008;Lambert et al 2010). DiazaCon also reduced cholesterol in grey squirrels (Sciurus carolinensis), although the effects on reproduction were difficult to interpret because of poor breeding success in the control group (Mayle et al 2013).…”

Section: Other Contraceptivesmentioning

confidence: 99%

“…The efficacy of this compound depends on its bioaccumulation; however, its consequently relatively long elimination half-life poses potential exposure risk to predators and scavengers of treated animals. Therefore, DiazaCon seems more suited for applications to captive wildlife, seasonal breeders and localised populations experiencing little or no predation and where non-target species can be prevented from feeding on DiazaCon-treated baits (Avery et al 2008;Fagerstone et al 2010).…”

Section: Other Contraceptivesmentioning

confidence: 99%

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Fertility control to mitigate human–wildlife conflicts: a review

2014

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Abstract. As human populations grow, conflicts with wildlife increase. Concurrently, concerns about the welfare, safety and environmental impacts of conventional lethal methods of wildlife management restrict the options available for conflict mitigation. In parallel, there is increasing interest in using fertility control to manage wildlife. The present review aimed at analysing trends in research on fertility control for wildlife, illustrating developments in fertility-control technologies and delivery methods of fertility-control agents, summarising the conclusions of empirical and theoretical studies of fertility control applied at the population level and offering criteria to guide decisions regarding the suitability of fertility control to mitigate human-wildlife conflicts. The review highlighted a growing interest in fertility control for wildlife, underpinned by increasing numbers of scientific studies. Most current practical applications of fertility control for wild mammals use injectable single-dose immunocontraceptive vaccines mainly aimed at sterilising females, although many of these vaccines are not yet commercially available. One oral avian contraceptive, nicarbazin, is commercially available in some countries. Potential new methods of remote contraceptive delivery include bacterial ghosts, virus-like particles and genetically modified transmissible and non-transmissible organisms, although none of these have yet progressed to field testing. In parallel, new species-specific delivery systems have been developed. The results of population-level studies of fertility control indicated that this approach may increase survival and affect social and spatial behaviour of treated animals, although the effects are species-and context-specific. The present studies suggested that a substantial initial effort is generally required to reduce population growth if fertility control is the sole wildlife management method. However, several empirical and field studies have demonstrated that fertility control, particularly of isolated populations, can be successfully used to limit population growth and reduce human-wildlife conflicts. In parallel, there is growing recognition of the possible synergy between fertility control and disease vaccination to optimise the maintenance of herd immunity in the management of wildlife diseases. The review provides a decision tree that can be used to determine whether fertility control should be employed to resolve specific human-wildlife conflicts. These criteria encompass public consultation, considerations about animal welfare and feasibility, evaluation of population responses, costs and sustainability.

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Section: Other Contraceptivesmentioning

confidence: 99%

Section: Other Contraceptivesmentioning

confidence: 99%

Fertility control to mitigate human–wildlife conflicts: a review

2014

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“…En cuanto a los métodos no letales, la eliminación de nidos es la más común a corto plazo (Avery et al 2002, Burgio et al 2014, Reed et al 2014, así como la aplicación de anticonceptivos (p. ej., diazacon ® ), aunque pueden afectar a otras especies que no son el blanco del manejo (Yoder et al 2005, Avery et al 2008.…”

Section: Discussionunclassified

“…Se le ha atribuido el carácter de plaga agrícola fundamentalmente en su área de origen, en donde se reconoce a esta cotorra como un agente de daño importante a cultivos de maíz, girasol, sorgo, durazno, pera y cítricos, para los que se ha calculado que inflige pérdidas anuales de entre 2 y 15%, que en algunos casos superan el 45% (Mott 1973, Gómez de Silva et al 2005, Avery et al 2008. Asimismo, aunque de manera más aislada, se han reportado perjuicios a ciertos cultivos de EUA (Davis 1974, Fall et al 2011, Woodward y Quinn 2011 y de España (Conroy y Senar 2009).…”

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La cotorra argentina (Myiopsitta monachus) en el Colegio de Postgraduados: ¿una especie invasiva?

Muñoz-Jiménez

Alcántara-Carbajal

2017

Huitzil Rev. Mex. Ornitol.

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ResumenFuera de su distribución original en Sudamérica, la cotorra argentina (Myiopsitta monachus) es considerada una especie invasora. Aunque registrada en vida libre en México desde 1999, son escasos los estudios de su impacto en la agricultura y en las aves nativas. De abril a agosto de 2015, evaluamos ambos impactos en lotes agrícolas experimentales del Campus Montecillo del Colegio de Postgraduados, Texcoco, Estado de México. Realizamos transectos en banda, observaciones focales en nidos, registros de sus comportamientos y evaluación directa (en mazorcas) e indirecta (encuestas) de los daños causados a cultivos de maíz por cotorras argentinas y otras aves. El tamaño aproximado de la población de cotorras fue de 35 individuos y encontramos ocho nidos muy localizados; el tamaño medio de la parvada fue de 2.59 individuos, y sus interacciones -particularmente conductas agresivas, χ² = 8.2, gl = 3, P = 0.01-fueron intraespecíficas. Según las encuestas, las cotorras perjudican principalmente al cultivo del maíz y plantaciones de chabacano, aunque en menor medida que otras aves, las que en conjunto producen un daño global a cultivos entre 8% y 50%. Además, 403 mazorcas (11% de total evaluado) presentaron daños, mientras que de estas solamente 57 (14%) fueron dañadas con certeza por cotorras. El promedio de elotes sin daño fue mayor comparado al de mazorcas perjudicadas (t = -4.99; P = 0.02). Los resultados sugieren que, en el Campus, la cotorra es una especie exótica invasora que causa perjuicios agrícolas, aunque en grado marginal; durante el muestreo no observamos interacción negativa con las aves nativas.Palabras clave: Psitácidos, aves, plagas, cultivos agrícolas, maíz, Estado de México. AbstractOutside its historical range in South America, the Monk Parakeet (Myiopsitta monachus) is considered an invasive species. Although recorded in the wild in Mexico since 1999, there are few studies of its impact on agriculture and native birds. From April to August 2015, we evaluated both impacts in agricultural parcels of the Montecillo Campus of Colegio de Postgraduados, Texcoco, State of Mexico, Mexico. We conducted band transects, focal observations on nests, and direct (on corncobs) as well as indirect assessments (polls) of the damage to the corn crops by parrots and other birds, and collected behavioral records. The approximately colony size was 35 individuals, and we found eight nests very much localized; furthermore, the average parakeet flock was of 2.59 individuals, and our observations show that their interactions -particularly aggressive behaviors (χ² = 8.2, df = 3, P = 0.05) -were intraspecific. According to the polls, the parrots damage mainly maize fields and apricot plantations, although to a lesser extent than other birds, which altogether produce an overall crop damage from 8% to 50%. Moreover, 403 ears of corn (11% of the total assessed) showed bird damage, but only 57 of these ears (14%) were definitely damaged by parrots. The average corn without damage was higher compared to the undamaged (t = -4.9...

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“…Por lo tanto, y siguiendo dichos lineamientos, sugerimos prohibir su venta en México y fomentar campañas de concientización para impedir su compra y evitar liberaciones. De manera particular para el Estado de México, y a partir de los lineamientos del Código para la Biodiversidad del Estado de México (cbem, 2005), recomendamos iniciar un programa de control reproductivo en zonas de anidamiento (Avery et al 2008 …”

Section: Registro Altitudinal Más Alto En México De Myiopsitta Monachusunclassified

Registro altitudinal más alto en México para la cotorra argentina (Myiopsitta monachus)

Salgado-Miranda¹,

Medina²,

Sánchez-Jasso³

et al. 2016

Huitzil Rev. Mex. Ornitol.

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ResumenInformamos de los primeros registros de la cotorra argentina (Myiopsitta monachus) en varias localidades de los municipios de Toluca y Metepec, dentro del Valle de Toluca en el Estado de México, México, a una altura de 2,617 a 2,764 msnm. Registramos nidos activos en izotes (Yucca spp.) y una colonia de 40 individuos alimentándose en árboles frutales. Debido a que ésta es una especie exótica e invasora recomendamos iniciar programas de monitoreo poblacional para determinar las causas de su establecimiento en estas zonas, así como para determinar posibles efectos en los ecosistemas de la región.Palabras clave: Valle de Toluca, Metepec, psitácidos. Highest altitudinal record of the Monk Parakeet (Myiopsitta monachus) in Mexico AbstractWe report the first record of the Monk Parakeet (Myiopsitta monachus) in several localities of the municipalities of Toluca and Metepec, in the Toluca Valley, State of Mexico, Mexico; at altitudes ranging from 2,617 to 2,764 masl. We found active nests in Yucca trees (Yucca spp.) and a colony of up to 40 individuals feeding on fruit trees. Given its status as exotic and invasive species, we recommend starting monitoring programmes to know the causes of its establishment in this area and the possible negative effects on the ecosystems of the region.

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Diazacon Inhibits Reproduction in Invasive Monk Parakeet Populations

Cited by 40 publications

References 8 publications

Fertility control to mitigate human–wildlife conflicts: a review

Fertility control to mitigate human–wildlife conflicts: a review

La cotorra argentina (Myiopsitta monachus) en el Colegio de Postgraduados: ¿una especie invasiva?

Registro altitudinal más alto en México para la cotorra argentina (Myiopsitta monachus)

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