2024-03-28T14:45:23Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/598122022-12-14T11:29:51Zcom_10261_13com_10261_8col_10261_266
DIGITAL.CSIC
author
Figuerola, Jordi
author
García, Luis
author
Green, Andy J.
author
Ibáñez, Fernando
author
Máñez, Manuel
author
Garrido, Héctor
author
Arroyo, José Luis
author
Rodríguez, Rubén
2012-11-08T10:39:36Z
2012-11-08T10:39:36Z
2006
Ardeola 53: 229- 235 (2006)
0570-7358
http://hdl.handle.net/10261/59812
Aims:We derived two discriminant equations to sex glossy ibis Plegadis falcinellus chicks (2 - 5 weeks old) based on morphological characters. Location: Doñana, South-West Spain. Methods:Wing length and tarsus length and width of 198 individuals were measured in the 2002 and 2003 breeding seasons. Results: Tarsus width was the most discriminant character and in combination with wing length allowed us to sex 86.9 % of individuals correctly. A formula based on wing and tarsus length also sexed 84.9 %of individuals correctly. The reliability of this second equation was also tested with an independent sample of 209 individuals measured in 2004, with error rates similar to those of the original data. Intervals for discriminant scores reducing errors in sexing to 10 % or 5 % were derived, at the cost of reducing the proportion of individuals that can be sexed. These equations should not be applied in other localities without validation, but our analyses suggest they can be used on different cohorts. We also describe a visual sexing technique found to have 95 % accuracy for an experienced observer. Conclusions: Sex can be reliably determined for many glossy ibis chicks. Given the considerable sexual size dimorphism found in many species of the family Threskionidae, tarsus width is likely to be a good variable to include in future analyses of sexual dimorphism in spoonbills and ibises.
spa
openAccess
Sex determination in glossy ibis chicks based on morphological characters
artículo
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URL
https://digital.csic.es/bitstream/10261/59812/1/ardeola.pdf
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https://digital.csic.es/bitstream/10261/59812/5/ardeola.pdf.txt
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ardeola.pdf.txt