Ortega-Segalerva, Alva

Universitat Autònoma de Barcelona. Facultat de Biociències

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Sexing the Monk Parakeet  (Myiopsitta monachus) by using external  measurements:  morphological and colour analysis   Introduction  • Psittacine Monk Parakeet (Myiopsitta monachus)  Agricultural and urban pest in many countries of the world • Sex determination  Key factor for the management and control of wild populations  Difficult task in psittacines 75% are monomorphic  Aim Find some variables that allow us sexing the Myiopsitta monachus by non-invasive external measurements and feather coloration analysis, based on the UV reflectance. Alba Ortega-Segalerva Museu Ciències Naturals de Barcelona Methods • Capture of 50 individuals using the Yunick trap (Yunick, R.P., 1971) Ciutadella park of Barcelona (2012- 2013) • Measurement of morphological variables wing, tail and beak length (mm) using a rule, beak height and width (mm) using a digital calliper, among other.  • Extract of feathers from wing, tail, flank, carpal and chest colorimetric analysis using Minolta spectrophotometer • Extract of blood (0,05ml) from cubical vein molecular sexing Discussion and Conclusions • In Psittacines, previous work suggest Ultraviolet reflectance and some morphological measurements, might be important to sex determination (Bonilla-Ruz, C. et all, 2011) • We obtain that Beak height, Wing length, Ultraviolet brightness and 4 more variables in combination allows 80% of sex determination   Measurements are easy to obtain in the field  Improve accuracy of studies on the population dynamics   Help in the design of management programs of the species • Surprisingly, we obtained higher values ​​of ultraviolet brightness wing feathers on females References  Bonilla-Ruz, C., Magallón, C.C. and Santos-Moreno, A. 2011. Determination of sexual secundary dimorphism in military macaw (Ara militaris): morphometry complementary with ocular index. Acta Zoológica Mexicana (n.s). 27 (2): 245-255 Yunick, R.P. 1971. The Squirrel-Proof trap platform. Ebba News. Vol. 34, No. 3: 120-126  Results A) Discriminate Analysis shows  a 80% correct the identification of sex from a model with 7 variables B) Univariate Analysis (ANOVA) shows significant values for Beak height, Wing length and Ultraviolet brightness from wing   B A P=0,00280 P=0,00927 P=0,04758 

Sexing the Monk Parakeet (Mylopsitta monachus) by using external measurements morphological and colour analysis

http://ddd.uab.cat/pub/tfg/2014/119226/TFG_albaortegasegalerva.pdf

Sexing the Monk Parakeet (Mylopsitta monachus) by using external measurements morphological and colour analysis

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