Morphometric age and sex identification of Eurasian Collared Doves (Streptopelia decaocto friv.)

In this research, our main goal was to test, if there is an effective, yet economical way to perform native sexing on Columbidae species in field conditions. Since molecular sexing is not available among field conditions, a morphometric method was aimed to be used. After morphometric measurements, autopsy was performed to determine the sex of collected birds. The novelty of the method is that we added a new measure point to improve age and sex determination. The method was tested on Eurasian Collared Doves (n=18). Our result showed that the gap of pubic bones is highly correlated to age and most of the main morphometric data, despite the low sample number.

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EFFECT OF AGE AND SEX ON MORPHOMETRIC MEASUREMENTS OF SAHELIAN GOATS IN FASKARI LOCAL GOVERNMENT AREA OF KATSINA STATE

FUDMA Journal of Sciences ◽

10.33003/fjs-2021-0501-507 ◽

2021 ◽

Vol 5 (1) ◽

pp. 11-15

Author(s):

A. M. Aliyu ◽

E. A. Rotimi ◽

N. M. Galadima

Keyword(s):

Body Weight ◽

Local Government ◽

Linear Measurement ◽

Local Government Area ◽

Linear Measurements ◽

Morphometric Measurements ◽

Measuring Tape ◽

Highly Correlated ◽

Effect Of Age ◽

Age And Sex

This research was conducted to determine the effect of age and sex on morphometric measurements and estimate correlation between body weights and morphological traits of Sahelian goat in Faskari Local Government Area, Katsina state. Experimental animals aged from 1-5 years were used for this study and were identified using physical appraisal. Physically healthy of both sexes and non-pregnant goats were sampled. The pairs of permanent incisors in the dentition of the goat were used to determine age, body weight by using bathroom weighing scale (kg), linear measurements using flexible tailor’s measuring tape and sex using physical observations. The results obtained, showed that age had significant (P<0.05) effects on RH, EL, HoL and TL, non-significant (P˃ 0.05) effect was found on BW, NL and BL. Sex had significant effect on BW, BL, HG and HoL and non- significant effect (P˃ 0.05) was found on RH, EL, TL and NL. Correlation coefficient between body weight and linear measurement shows that BW was highly correlated (P<0.01) with BL, HG and NL. BW was slightly correlated with RH and it was negatively correlated EL and HoL.

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A PCR-based method for genetic sex identification and evidence of the XX/XY sex determination system in largemouth bass (Micropterus salmoides L.)

Aquaculture ◽

10.1016/j.aquaculture.2021.737220 ◽

2021 ◽

pp. 737220

Author(s):

Jinxing Du ◽

Jiahui Zhou ◽

Shengjie Li ◽

Jiaqi Shao ◽

Peng Jiang ◽

...

Keyword(s):

Sex Determination ◽

Largemouth Bass ◽

Micropterus Salmoides ◽

Sex Identification ◽

Genetic Sex Identification ◽

Determination System ◽

Sex Determination System

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Sex determination in pre-fledgling chicks of the Black-faced Spoonbill (Platalea minor) based on morphometric measurements

The Korean Journal of Ornithology ◽

10.30980/kjo.2021.12.28.2.117 ◽

2021 ◽

Vol 28 (2) ◽

pp. 117-121

Author(s):

In-Ki Kwon ◽

Ji-Yeon Lee ◽

Jong-Hyun Park ◽

Eun-Joo Choi ◽

Ki-Sup Lee ◽

...

Keyword(s):

Sex Determination ◽

Morphometric Measurements

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Sex determination of adult Rock Shags by molecular sexing and morphometric parameters

Journal of Field Ornithology ◽

10.1648/0273-8570-74.4.370 ◽

2003 ◽

Vol 74 (4) ◽

pp. 370-375 ◽

Cited By ~ 15

Author(s):

Flavio Quintana ◽

Gustavo Somoza ◽

Marcela Uhart ◽

Carolina Cassará ◽

Patricia Gandini ◽

...

Keyword(s):

Sex Determination ◽

Morphometric Parameters ◽

Molecular Sexing

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Use of molecular methods in identification of species, age and sex of insects useful in forensic entomology

Issues of Forensic Science ◽

10.34836/pk.2014.286.4 ◽

2014 ◽

Vol 286 ◽

pp. 66-69

Author(s):

Joanna Stojak ◽

Keyword(s):

Dna Barcoding ◽

Species Identification ◽

Environmental Conditions ◽

Forensic Entomology ◽

Sex Identification ◽

The Body ◽

Molecular Methods ◽

Insect Larvae ◽

Identification Of Species ◽

Age And Sex

Forensic entomology uses insects to determine the time, cause and place of death. To this end, two entomological methods are used. The development-based method uses the patterns of insect larvae development under the specific thermal and environmental conditions. The succession-based method analyzes the sequence of insect succession on the body in various environmental conditions. The proper insect species identification is essential in both methods. In this article, the molecular methods of species, age and sex identification are presented such as DNA barcoding or DNA-HRM-PCR.

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Morphometric Sex Identification of Nestling and Free-Flying Tasmanian Wedge-Tailed Eagles (Aquila audax fleayi)

Journal of Raptor Research ◽

10.3356/jrr-20-115 ◽

2021 ◽

Author(s):

James M. Pay ◽

Todd E. Katzner ◽

Jason M. Wiersma ◽

William E. Brown ◽

Clare E. Hawkins ◽

...

Keyword(s):

Late Stage ◽

Sex Identification ◽

Age Classes ◽

Single Measurement ◽

Morphometric Measurements ◽

Molecular Analyses ◽

Linear Discriminant ◽

Causes Of Mortality ◽

Forearm Length ◽

Discriminant Function Analyses

ABSTRACT The endangered Tasmanian Wedge-tailed Eagle (Aquila audax fleayi) is the focus of continued research and conservation efforts. A tool for accurate and efficient identification of the sex of individuals would be a valuable aid to research and management. However, plumages are monomorphic between the sexes, making sex identification difficult without molecular analyses. Our aim was to assess whether Tasmanian Wedge-tailed Eagles of different age classes could be sexed accurately using morphological measurements. We took measurements of 25 live late-stage eagle nestlings and 108 carcasses of free-flying birds found opportunistically throughout Tasmania. Sex of all individuals was confirmed via genetic analyses. Free-flying birds were larger than nestlings; thus, we used age-specific statistical tools to distinguish the sexes. For both nestlings and free-flying birds, females were significantly larger than males, but overlap between the sexes prevented accurate sex identification using any single measurement. We used stepwise linear discriminant function analyses to select morphometric measurements necessary for accurate sex identification. Free-flying birds could be sexed with 97.6% accuracy using a combination of measurements of the forearm length, tarsus width (i.e., lateromedial width), and hallux length. Late-stage nestlings (9–10 wk old) could be sexed with 95.4% accuracy using measurements of the hallux width (i.e., lateromedial width), hallux breadth (i.e., anteroposterior width of hallux), and tarsus breadth (i.e., anteroposterior width of the tarsometatarsus at the narrowest point). The discriminate functions we present also allow the identification of sex in cases where morphological sex identification may be in doubt and molecular analyses should be prioritized. These equations provide a valuable research tool for studies of sexual differences in behavior and causes of mortality of this endangered subspecies.

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