Sex determination of Antarctic Petrels Thalassoica antarctica by discriminant analysis of morphometric characters

Polar Biology ◽  
1994 ◽  
Vol 14 (2) ◽  
Author(s):  
Svein-H�kon Lorentsen ◽  
Nils R�v
Keyword(s):  
Discriminant Analysis ◽  
Sex Determination ◽  
Morphometric Characters

scholarly journals Sex determination of Iberian Azure‐winged MagpiesCyanopica cyanus cookiby discriminant analysis of external measurements

2007 ◽  
Vol 23 (4) ◽  
pp. 211-216 ◽  
Author(s):  
Susana Alarcos ◽  
Carlos De La Cruz ◽  
Elena Solís ◽  
Juliana Valencia ◽  
María Jesús García‐Baquero
Keyword(s):  
Discriminant Analysis ◽  
Sex Determination

Sex Determination of the Ommastrephid Squid Illex illecebrosus Using Beak Morphometries

1980 ◽  
Vol 37 (2) ◽  
pp. 283-286 ◽  
Author(s):  
M. C. Mercer ◽  
R. K. Misra ◽  
G. V. Hurley
Keyword(s):  
Discriminant Analysis ◽  
Sex Determination ◽  
Analytical Procedure ◽  
Discriminant Functions ◽  
Sex Composition ◽  
Multivariate Discriminant Analysis ◽  
Lower Beak ◽  
Multivariate Discriminant

The beak morphometrics of the ommastrephid squid Illex illecebrosus were analyzed as possible criteria for determining sex composition of beak samples taken from predator stomachs. A multivariate analytical procedure was adopted to elucidate the course of discriminant analysis needed in this study. The discriminant functions presented here can be employed usefully in identifying the sex of an unknown individual from either the upper or lower beak morphometrics.Key words: squid, Illex, beak, morphometrics, multivariate, discriminant analysis, sex determination

scholarly journals Morphometric sex determination of young Ospreys Pandion haliaetus using discriminant analysis

Bird Study ◽  
2010 ◽  
Vol 57 (3) ◽  
pp. 336-343 ◽  
Author(s):  
Roberto Muriel ◽  
Eva Casado ◽  
Daniel Schmidt ◽  
Cecilia P. Calabuig ◽  
Miguel Ferrer
Keyword(s):  
Discriminant Analysis ◽  
Sex Determination ◽  
Pandion Haliaetus

USe of morphometric parameters for the determination of sex of Adelie penguins.

1992 ◽  
Vol 19 (6) ◽  
pp. 657 ◽  
Author(s):  
KR Kerry ◽  
DJ Agnew ◽  
JR Clarke ◽  
GD Else
Keyword(s):  
Discriminant Analysis ◽  
Breeding Birds ◽  
Pygoscelis Adeliae ◽  
Discriminant Score ◽  
Morphometric Characters ◽  
Mean And Variance ◽  
The Mean ◽  
Bill Length

The sex of Addie penguins, Pygoscelis adeliae, may be determined by cloacal examination during the early part of the breeding season. Later in the season it becomes increasingly difficult to determine the sex of penguins by this method as the structures used for identification regress. Discriminant analysis of morphometric characters has been suggested as an alternative. This technique was examined for breeding birds of known sex near Mawson Station, Antarctica. The sex of 89% of breeding birds could be correctly determined by comparing the discriminant score D = 0.582 Bl + 1.118 Bd + 0.219Fw, where Bl is bill length, Bd is bill depth and Fw is flipper width, with a mean discriminant score (MDS) of 55.39. In all, the sexes of 87% were correctly determined by means of length and depth only (D=0.601Bl+ 1.154Bd, MDS=44.96). The sex of juvenile birds could not be determined. Determination of sex by discriminant analysis is shown to give acceptable estimates of morphometric characters divided by sex where only the mean and variance of these variables but not the sexual identity of individual birds is required. Where absolute accuracy in sex determination is required, 80% of the birds in our samples would have to be discarded to be 90% confident of the sex of the remainder.

SEX DETERMINATION OF FETUS PRENATAL FROM MATERNAL PLASMA BY USING DUPLEX PCR TECHNIQUE IN GOAT

2014 ◽  
Vol 13 (1) ◽  
pp. 50-59
Author(s):  
A NisreenYasirJasim ◽  
Tahir A. Fahid ◽  
Talib Ahmed Jaayid
Keyword(s):  
Sex Determination ◽  
Maternal Plasma ◽  
Duplex Pcr

Study of Significance of Pelvic Brim Chord and Pelvic Brim Depth in Sex Determination of Human Hip Bone

2012 ◽  
Vol 3 (1) ◽  
pp. 384-386
Author(s):  
Dr. Sudarshan Gupta ◽  
◽  
Dr. Bhadresh Vaghela ◽  
Dr. Deepak Howale ◽  
Dr. Mehul Tandel
Keyword(s):  
Sex Determination ◽  
Pelvic Brim

AVALIAÇÃO DO CONHECIMENTO TRADICIONAL DOS PESCADORES DA RDSM APLICADO À IDENTIFICAÇÃO DO SEXO DE PIRARUCUS

2010 ◽  
Vol 5 (2) ◽  
pp. 59-66
Author(s):  
Kelven Lopes ◽  
Helder Lima de Queiroz
Keyword(s):  
Sex Determination ◽  
Traditional Knowledge ◽  
Structured Interviews ◽  
Sustainable Fisheries ◽  
Arapaima Gigas ◽  
Males And Females

This study examined the traditional knowledge of fishermen at Mamirauá Reserve about sex determination of pirarucus, Arapaima gigas Schinz 1822. We evaluated the criteria used for by fishermen in the sector Jarauá at Mamirauá Reserve for this determination, during the fisheries season, from October to November 2004. We analyzed responses of a group of about 15 fishermen collected in structured interviews regarding 109 individual pirarucus, 65 males and 44 females. From this sample, only 64 fish have their sex correctly predicted by the fishermen. Although the traditional knowledge of local fishermen is a key component of the sustainable fisheries of this species, this knowledge is not functional in all ranges and aspects, as in sex distinction. We found that the local fishermen evaluated are not able to recognize the sex of pirarucus, although some criteria applied for this purpose are consistent with their biology. The rates of correct forecasts for recognition of males and females were similar to those obtained by chance, even when the criteria applied were consistent, as the criterion “coloration”, which was significantly consistent for identification of males. Yet the group of fishermen interviewed in this study apparently did not apply this criterion correctly.

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