New PCR multiplexes for sex typing of ostriches

Malagó-Júnior, W; Medaglia, Adriana; Matheucci-Júnior, E; Henrique-Silva, Flávio

doi:10.1590/s1519-69842005000400023

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…Cloacal sexing is a broadly applied technique, for it provides immediate results, does not need special equipment and is not traumatic (Volodin et al 2009;Bazzano et al 2012). However some authors mention negative effects associated with this technique: traumas (Turner 1953), stress, bleeding (Malagó et al 2005) as well as prolapses and infections to ratite chicks (Huchzermeyer 1998;Soley and Groenewals 1999). For waterfowl, this method includes cloaca inversion (Hanson 1949;Purchase 1978;Volodin et al 2009), whereas for doves, alcids, penguins and some rails, cloacal sexing is possible by the cloaca orifice, which is prominent in females during the egg laying period (Serventy 1956;Boersma and Davies 1987;Copestake et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Gender identification using acoustic analysis in birds without external sexual dimorphism

Volodin

Volodina²,

Klenova

et al. 2015

Avian Res

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Zoo and wildlife management faces a problem with bird sexing, as many bird taxa have indiscernible gender differences in size and coloration. Problematic groups are geese, cranes, rails, raptors, owls, parrots, doves, auks, shearwaters and some passerines. Commonly accepted invasive sexing techniques based on genetics, laparoscopy, morphometric and on cloacal inspection, are all needed in bird capturing and handling. Capturing and subsequent manipulations may be inapplicable for free-ranging birds, whereas distant voice-based sexing is relevant for many species. This review evaluates the potential for noninvasive sexing by separate calls or duet calls, for adult birds of 69 species from 16 orders and for chicks of 11 species from 7 orders. For adult birds of 25 species, a single call per individual was sufficient for 100 % reliable sexing by ear or using spectrographic analysis. For chicks, the potential for voice-based sexing seems to be very limited. For birds calling rarely or unpredictably, we propose a simple way of provoking vocalization using playbacks of species-specific calls that are available from sound libraries. We conclude that sexing by voice may represent a feasible alternative to the classical sexing techniques, both in the wild and in captivity.

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