<i>Campylorhynchus</i> wrens: the ecology of delayed dispersal and cooperation in the Venezuelan savanna

Rabenold, Kerry N.

doi:10.1017/cbo9780511752452.007

Cited by 102 publications

(74 citation statements)

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“…This region is a vast palm {Copernicia tectorum) savanna that contains occasional stands of leguminous trees in which Stripe-backed Wrens forage, roost and breed. Since 1977, wrens from three clusters of social groups ("populations") on the ranch have been routinely captured with mist nets, marked with colored leg bands and studied (see Rabenold 1990). These three clusters are the Samán Population (25-30 groups observed since 1978), the Guácimo Population (30-40 groups observed since 1985) and the Palma Population (20-30 groups observed since 1987).…”

Section: Methodsmentioning

confidence: 99%

“…The set of group members that took part in aggressive chases matched the set observed to be parents of offspring in wren groups (Rabenold et al 1990). In 197 of the 201 cases wherein both birds involved in an aggressive chase were identified, the pursuer was a DM or a DF-stepson and the pursued bird the dominant female.…”

Section: Patterns In the Occurrence Of Aggressive Chasesmentioning

confidence: 99%

“…Two of five subordinate females attacked by DFs in 1990 and 1991 had themselves been DFs in the group previously. In the remaining three cases, however, the subordinate female was the daughter of the DM and therefore unable to breed (see Rabenold 1990). Apparently a female that has just become the DF shows aggression towards all unfamiliar females in her group because she is unable to distinguish possible breeders from those unable to breed (daughters of the DM).…”

Section: Copulationmentioning

confidence: 99%

“…Many aspects of the behavior and ecology of the Stripe-backed Wren have already been described (see Rabenold 1990 for a review), and I will give only a brief sketch here. The Stripe-backed Wren is a medium-sized passerine (25 g) and occurs in cooperative groups of 2-10 individuals (mean group size in 1991 = 3.9 ± 1.8 SD, n = 59).…”

Section: Behavioral Ecology Of the Stripe-backed Wrenmentioning

confidence: 99%

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Courtship, Copulation, Nesting Behavior and Brood Parasitism in the Venezuelan Stripe-Backed Wren

Piper¹

1994

The Condor

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Abstract. Here I report the results of intensive observations of breeding behavior in the Stripe-backed Wren Campylorhynchus nuchalis of Venezuela, a polyandrous cooperative breeder. The breeding season in this species begins soon after the first rainfall of the wet season, and its onset is marked by conspicuous courtship of the dominant female by the dominant male and by subordinate males that are not sons of the dominant female. Copulations, of which an estimated nine occur per breeding attempt, take place in plain view and throughout the day but not in close temporal association with courtship. The amount of food provided to nestlings varies greatly among adult group members but is not correlated either to their relatedness to the young or their dominance status. Stripe-backed Wrens defend their nests vigorously, chasing dozens of species away including predators, nest competitors and the Shiny Cowbird, which parasitized at least 16% of nests surveyed in 1990 and 1991 and which appears to reduce severely the reproductive success of large and small groups alike.Key words: Campylorhynchus nuchahs; cooperative breeding; courtship; copulation; brood parasitism.Resumen. Aqui presento los resultados de observaciones intensas del comportamiento reproductivo del Cucarachero Chocorocoy Campylorhynchus nuchalis de Venezuela, un reproductor poliándrico y cooperativo. La estación reproductiva de esta especie comienza poco después de la primeras lluvias de la época lluviosa, y su comienzo es marcado por el cortejo conspicuo hacia la hembra dominante por el macho dominante y por machos subordinados que no son hijos de la hembra dominante. Las copulaciones, de las cuales se estima que ocurren nueve por intento de apareo, acontecen a plena vista y durante todo el dia, pero nunca en proximidad temporal con el cortejo. La cantidad de alimento proveído a los pichones varia grandemente entre los adultos de cada grupo, pero no está correlacionada ni con parentesco, ni con nivel de dominancia. Los cucaracheros defienden sus nidos vigorosamente, persiguiendo a dozenas de especies inclusive depredadores, competidores, y a los Tordos Mirlos Molothrus bonariensis, aves que parasitizan por lo menos el 16% de los nidos vistos en 1990 y 1991, y las cuales parecen reducir severamente el éxito reproductivo de grupos grandes y pequeños por igual.

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Section: Methodsmentioning

confidence: 99%

Section: Patterns In the Occurrence Of Aggressive Chasesmentioning

confidence: 99%

Section: Copulationmentioning

confidence: 99%

Section: Behavioral Ecology Of the Stripe-backed Wrenmentioning

confidence: 99%

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Courtship, Copulation, Nesting Behavior and Brood Parasitism in the Venezuelan Stripe-Backed Wren

Piper¹

1994

The Condor

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“…Estas se establecieron teniendo en cuenta cuatro de los algoritmos más utilizados y recomendados en la literatura: el de presencia mínima de los puntos de entrenamiento (minimum training presence, MTP), el 10 percentil (10 percentile training presence, 10 P), la sensibilidad y especificidad equivalentes (equal training sensitivity and specificity, ETSS) y la de sensibilidad máxima de entrenamiento más especificidad (Maximum training sensitivity plus specificity, MTSPS) (Liu, Berry, Dawson, & Pearson, 2005;Peterson et al, 2008). Para seleccionar el mejor entre los cuatro algoritmos, se tuvieron en cuenta aspectos descritos de la historia natural de la especie (Zimmerman, 1957;Rabenold, 1990;Howell & Webb, 1995;Barker, 2007;Vargas-Soriano et al, 2010;MacKinnon, 2013), así como información que se conoce CUADRO 1 Variables utilizadas para modelar la distribución potencial y el nicho ecológico potencial de Campylorhynchus yucatanicus en la Península de Yucatán Se muestran los valores y vectores propios de cada variable que se obtuvieron en el PCA para graficar en dos dimensiones el espacio ambiental con los dos primeros componentes.…”

Section: Materiales Y Métodosunclassified

Distribución potencial y conectividad del paisaje: criterios para reevaluar el grado de amenaza de Campylorhynchus yucatanicus (Aves: Troglodytidae)

Serrano-Rodríguez

Escalona‐Segura

Vázquez³

et al. 2017

RBT

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Potential distribution and landscape connectivity: criteria for reevaluating the threat degree of Campylorhynchus yucatanicus (Aves: Troglodytidae). Geographic distribution and habitat quality are key criteria for assessing the degree of risk of species extinction threat. Campylorhynchus yucatanicus (Yucatán Wren, Troglodytidae) is an endemic bird of the Northern coast of the Yucatán Peninsula, Mexico, with a distribution restricted to a narrow strip of habitat, between Campeche and Yucatán states. Currently, the Yucatán coast has lost more than half of the coastal dune vegetation, and other habitats have been modified mainly because there is no urban development plan and the natural resources management is poor. These factors threaten C. yucatanicus, which is listed as a near threatened species by IUCN and as an endangered species by Mexican law NOM-059-2010. In this paper, C. yucatanicus´s potential distribution was modeled using 64 presence records from several sources (1960 y 2009), a set of climate variables, and a vegetation index layer of normalized difference (NDVI). To assess the degree of landscape connectivity we used a map of vegetation types and land use, distance to villages and paved roads. The potential distribution model showed an area of approximately 2 711 km 2 , which is 2 % of the total area of the Yucatán Peninsula distribution. In this area, only 27 % is protected by Biosphere Reserve category and only 10 % belong to core conservation areas, with land use restrictions and relatively effective protection. The populations from Ría Lagartos and Western Celestún regions appear to be the most isolated following the model of landscape connectivity. Landscape permeability among fragments of dune vegetation near the coast is low, mainly due to the distribution of urban areas. These results can be used to establish management strategies, and show that the species is in more delicate conditions than what it has been described by IUCN. We consider that C. yucatanicus should be given endangered category by IUCN, because of their distribution and the context of the current landscape connectivity. Rev. Biol. Trop. 65 (4): 1554-1568. Epub 2017 December 01.

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Group size and aggression: ‘recruitment incentives’ in a cooperatively breeding primate

Schaffner

French

1997

Animal Behaviour

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Campylorhynchus wrens: the ecology of delayed dispersal and cooperation in the Venezuelan savanna

Cited by 102 publications

References 0 publications

Courtship, Copulation, Nesting Behavior and Brood Parasitism in the Venezuelan Stripe-Backed Wren

Courtship, Copulation, Nesting Behavior and Brood Parasitism in the Venezuelan Stripe-Backed Wren

Distribución potencial y conectividad del paisaje: criterios para reevaluar el grado de amenaza de Campylorhynchus yucatanicus (Aves: Troglodytidae)

Group size and aggression: ‘recruitment incentives’ in a cooperatively breeding primate

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