2024-03-28T15:10:08Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/577252019-08-07T08:56:16Zcom_10261_13com_10261_8col_10261_266
Determining sex of Magellanic Penguins using molecular procedures and discriminant functions
Bertellotti, Marcelo
Tella, José Luis
Godoy, José A.
Blanco, Guillermo
Forero, Manuela G.
Donázar, José A.
Ceballos, Olga
Magellanic Penguins (Spheniscus magellanicus) show little sexual dimorphism, and although males are usually larger than females, sexing by direct observation may be difficult, especially in the case of chicks. In this paper we evaluate the utility of four different PCR-based sex determination techniques using genomic DNA for sexing Magellanic Penguins. We found that the primer set designed for sex determination in Collared Flycatcher (Ficedula albicollis) also provided a reliable, simple and convenient sexing procedure for Magellanic Penguins. Additionally, we obtained discriminant functions for sexing adults and chicks, sampled at six colonies differing in size and other ecological characteristics. Discriminant function for adults used two variables, bill length and bill depth that correctly classified 97% of the birds. Discriminant function for chicks included bill length and flipper length and correctly classified 78% of the individuals. Although molecular and biometric approaches could be useful for sexing adult Magellanic Penguins, only molecular procedures proved appropriate for accurately sexing chicks.
2012-10-10T09:14:46Z
2012-10-10T09:14:46Z
2002
2012-10-10T09:14:47Z
artículo
Waterbirds 25: 479- 484 (2002)
http://hdl.handle.net/10261/57725
10.1675/1524-4695(2002)025[0479:DSOMPU]2.0.CO;2
eng
openAccess
Waterbird Society