Distance from the forest edge matters in habitat selection of the Blue-footed Booby Sula nebouxii

Montes-Medina, Adolfo Christian; Drummond, Hugh; Kim, Sin‐Yeon

doi:10.1007/s10336-009-0405-3

Cited by 3 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Local density for analysis of a male breeder's probability of siring chicks at other nests included all nests within 10 m of his whose males' assumed period of sexual activity overlapped his. We used a radius of 10 m since boobies interact most often with individuals nesting within this distance (Drummond, Torres, Juarez, & Kim, 2010;Montes-Medina, Drummond, & Kim, 2009;Osorio-Beristain & Drummond, 1993).…”

Section: Local Nest Densitymentioning

confidence: 99%

Habitat structure and colony structure constrain extrapair paternity in a colonial bird

et al. 2014

Self Cite

View full text Add to dashboard Cite

Individual variation in sexual fidelity and extra-pair paternity (EPP) is widely attributed to environmental heterogeneity, but the only variables known to be influential are food abundance and density of conspecific breeders (potential extra-pair partners). Habitat structure is thought to impact EPP but is rarely measured and, when considered, is usually confounded with food abundance and predation pressure. To sidestep these confounds, we tested whether EPP is associated with habitat structure variables and with local conspecific density in a species whose nesting habitat is not used for feeding and lacks predators. In a blue-footed booby (Sula nebouxii) colony, the probability of EPP in a female's nest was highest in parts of the study plot where there were few obstacles to locomotion, and quadratically related to local density of sexually active males, even though local males did not sire the EP chicks. The probability of a male breeder siring EP (extra-pair) chicks elsewhere was quadratically related to local density of sexually active males around his nest. From these patterns we infer that both sexes may foray for EP interactions, that males and females nesting at intermediate density are most likely to be accessed by forayers, and that obstacles in the vicinity of a female's nest constrain access of foraying males. To our knowledge, this is the first demonstration that individual variation in EPP is associated with habitat structure in the absence of confounding variation in food availability, predation pressure or breeder quality, and the first evidence that EPP opportunities of female and male breeders are reduced by high density of conspecific breeders above a particular threshold.

show abstract

Section: Local Nest Densitymentioning

confidence: 99%

Habitat structure and colony structure constrain extrapair paternity in a colonial bird

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Habitat suitability is determined by many biological parameters, such as the number of predators and conspecifics, and physical parameters such as microclimate and its association with weather (Sutherland 1996, Montes-Medina et al 2009. Individuals may estimate habitat suitability by actions or success, and even mere presence or absence, of conspecifics.…”

Section: Introductionmentioning

confidence: 99%

A choice between two adjacent islands: is switching nest sites related to weather or nest density in the Common Eider (Somateria mollissima)?

Jónsson,

Lúðvíksson.

2013

Ornis Fenn

View full text Add to dashboard Cite

Birds change nest sites between years in response to breeding success in previous years, activities of other breeders, or weather conditions. Sixteen years of banding data and nest counts of the Common Eider in Rif, western Iceland, were used to evaluate probability of switching nest islands. The two man-made islands studied had different substrates (grass vs. rock) and in some years, different nest-initiation dates. Nest numbers were not related to weather. The apparent survival was not related to annual variation, weather or nest den-sity. Conversely, the probability of switching islands (movement probability) was plausi-bly affected by three covariates: (1) winters with higher precipitation decreased the prob-ability of switching from the grassy to the rocky island; (2) as winters became milder from 1993 to 2008, the probability of switching islands decreased; and (3) as the nest numbers increased from 155 to 606 during 1993–2008, the probability of switching islands de-creased. Winter weather may have affected nest switching primarily via precipitation, which partly determined water levels in the colony. An inverse relationship between nest density and the probability of switching islands is consistent with conspecific facilitation in colonially-nesting bird species.

show abstract

The Tourism Carrying Capacity of Underwater Trails in Isabel Island National Park, Mexico

Ríos‐Jara

Galván‐Villa

Rodríguez‐Zaragoza

et al. 2013

Environmental Management

View full text Add to dashboard Cite

The popularity of ecotourism in the marine protected areas of Mexico has increased over the last 10 years; in particular there is a large development of a SCUBA diving industry in the Mexican Pacific including Isabel Island. Given the risks associated with human activity in the marine environments around this island, we propose two ecotourism management strategies: (1) the creation and use of underwater trails, and (2) the estimation of the specific tourism carrying capacity (TCC) for each trail. Six underwater trails were selected in sites that presented elements of biological, geological, and scenic interest, using information obtained during field observations. The methodology used to estimate the TCC was based upon the physical and biological conditions of each site, the infrastructure and equipment available, and the characteristics of the service providers and the administrators of the park. Correction factors of the TCC included elements of the quality of the visit and the threat and vulnerability of the marine environment of each trail (e.g., divers' expertise, size and distance between groups of divers, accessibility, wind, coral coverage). The TCC values ranged between 1,252 and 1,642 dives/year/trail, with a total of 8,597 dives/year for all six trails. Although these numbers are higher than the actual number of recreational visitors to the island (~1,000 dives per year), there is a need for adequate preventive management if the diving sites are to maintain their esthetic appeal and biological characteristics. Such management might be initially directed toward using only the sites and the TCC proposed here.

show abstract

Distance from the forest edge matters in habitat selection of the Blue-footed Booby Sula nebouxii

Cited by 3 publications

References 42 publications

Habitat structure and colony structure constrain extrapair paternity in a colonial bird

Habitat structure and colony structure constrain extrapair paternity in a colonial bird

A choice between two adjacent islands: is switching nest sites related to weather or nest density in the Common Eider (Somateria mollissima)?

The Tourism Carrying Capacity of Underwater Trails in Isabel Island National Park, Mexico

Contact Info

Product

Resources

About