Buscar
Mostrando ítems 1-10 de 44
No evidence of predation causing female-biased sex ratios in marine pelagic copepods
(Oldendorf, 2013-12-12)
Although sex ratios close to unity are expected in dioecious species, biased sex ratios are common in nature. It is essential to understand causes of skewed sex ratios in situ, as they can lead to mate limitation and have ...
Female-biased sex ratios in marine pelagic copepods: Response to Hirst et al. (2013)
(Oldendorf, 2013-12-12)
Hirst et al. (2013; Mar Ecol Prog Ser 489:297-298) suggest that Gusmão et al. (2013; Mar Ecol Prog Ser 482:279-298) misinterpreted the findings of Hirst et al. (2010; Limnol Oceanogr 55:2193-2206). They restate that the ...
Sex-dependent foraging effort and vigilance in coal-crested finches, Charitospiza eucosma (Aves: Emberizidae) during the breeding season: evidence of female-biased predation?
(Sociedade Brasileira de Zoologia, 2011-04)
Mudflat Use and Predation on Male Southwestern Atlantic Fiddler Crabs (Uca uruguayensis) by Gull-billed Terns (Gelochelidon nilotica)
(Waterbird Society, 2018-03-01)
Gull-billed Terns (Gelochelidon nilotica) comprise a group of cosmopolitan subspecies that make use of a wide range of aquatic ecosystems and have a broad dietary spectrum. This study documents the use of a southwestern ...
The influence of energy, nutritional value and noxiousness of prey in sex- and size-biased predation by Snail Kites in southern South America
(Csiro Publishing, 2017-10)
Snail Kites (Rostrhamus sociabilis) feed almost exclusively on Apple Snails (Pomacea spp.). While field observations indicate they discard the noxious albumen gland (AG) when feeding on female snails, there is no information ...
Variable sex-specific mortality due to shorebird predation on a fiddler crab
(National Research Council Canada-NRC Research Press, 2003-07)
Male fiddler crabs compete for access to mates mainly by displaying an enlarged claw. One cost of this large claw is presumed to be higher exposure to predators. The fiddler crab Uca uruguayensis is used as a food source ...
Sex ratios in juveniles and adults of Dichroplus maculipennis (Blanchard) and Borellia bruneri (Rehn) (Orthoptera: Acrididae)
(Sociedade Brasileira de Entomologia, 2015-05)
Dichroplus maculipennis and Borellia bruneri are two of the 18 grasshopper species of actual or potential economic relevance as pests in Argentina. The objective of this study was to estimate the sex ratios for adults and ...
Chinstrap penguin population genetic structure: one or more populations along the Southern Ocean?
(Biomed Central, 2018)
Background: Historical factors, demography, reproduction and dispersal are crucial in determining the genetic structure of seabirds. In the Antarctic marine environment, penguins are a major component of the avian biomass, ...
Chinstrap penguin population genetic structure: One or more populations along the Southern Ocean?
(BioMed Central Ltd., 2018)
© 2018 The Author(s). Background: Historical factors, demography, reproduction and dispersal are crucial in determining the genetic structure of seabirds. In the Antarctic marine environment, penguins are a major component ...