Sexual Size Dimorphism and Mating Pattern in the Painted Stork (Mycteria leucocephala)

Urfi, Abdul Jamil; Kalam, Abdul

doi:10.1675/1524-4695(2006)29[489:ssdamp]2.0.co;2

Cited by 20 publications

(21 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mc Cracken et al (2000) also reported 75.2 % for five components extracted in male Musk ducks. Conversely, in a similar study on another water bird, Urfi and Kalan (2006) extracted two PCs for male Painted Stork accounting for 85 % of the total variance. Discrepancies observed in the total variance explained and the number of the extracted factors in the present study and the earlier ones might be attributed to the differences in the number of variables measured, age of the birds and species involved.…”

Section: Principal Component Analysis Of Male Muscovy Ducksmentioning

confidence: 99%

Sexual size dimorphism and sex determination by morphometric measurements in locally adapted muscovy duck (Cairina moschata) in Nigeria

Oguntunji

Ayorinde

2015

AAS

View full text Add to dashboard Cite

Sexual size dimorphism (SSD) is a common phenomenon in most mammalian and poultry species. This study was undertaken to investigate SSD in nondescript locally adapted Muscovy ducks in Nigeria by applying descriptive analysis, sexual dimorphism index (SDI), sexual size dimorphism index (SSDI) and Principal Component analysis to morphological variables. Besides, attempt was made to identify best morphological predictors of sex using Stepwise Discriminant analysis. Data on ten morphological traits; body weight, body girth, body length, wing length, shank length, shank circumference, thigh length, total leg length, bill length and bill width were taken from 1,020 extensively managed adult Muscovy ducks comprising 287 males and 733 females. These birds were randomly sampled from Rain Forest, Derived Savanna and Guinea Savanna agro-ecological zones of Nigeria. Sex significantly (P < 0.001) affected all morphometric measurements in favour of males. Assessment of relative contribution of morphological traits to SSD through SDI and SSDI revealed that body weight followed by skeletal frame-related variables (body length and wing length) were the most dimorphic traits. Three Principal Components were generated for each sex; accounting for 62.70 % and 54.24 % of the total variance explained of male and female ducks, respectively. In tandem with the SDI and SSDI results, Stepwise Discriminant analysis indicated body weight as the best predictor of sex of adult Muscovy ducks followed by wing length and body length; correctly classifying 98.5 % of ducks and are reliable for sex determination in the field. The established SSD in this study could be employed for description, utilization, selection and planning of improvement programs of male and female Muscovy ducks.Key words: ducks / Muscovy duck / Cairina moschata / sex / size / dimorphism / morphometric measurements / Nigeria Spolni dimorfizem in določitev spola na osnovi morfometričnih meritev pri lokalno prilagojeni muškatni raci (Cairina moschata) v Nigeriji Spolni dimorfizem telesne velikosti (SDTV) je splošen pojav pri večini vrst sesalcev in perutnine. To študijo smo zasnovali z namenom, da bi proučili SDTV pri doslej neopisani, na lokalne razmere prilagojeni muškatni raci v Nigeriji s pomočjo opisne analize, indeksa spolnega dimorfizma (ISD), indeksa spolnega dimorfizma telesne velkosti (ISDTV) in analize glavnih komponent variance morfoloških lastnosti. Poskušali smo tudi določiti morfološke lastnosti z največjo napovedno vrednostjo za določitev spola z več-stopenjsko diskriminantno analizo. Podatke o desetih morfoloških lastnostih: telesna masa, obseg telesa, dolžina telesa, dolžina krill, dolžina goleni, obseg goleni, dolžina stegna, dolžina noge, dolžina kljuna in širina kljuna, smo zbrali pri 1.020 muškatnih racah iz ekstenzivne reje, med katerimi je bilo 287 samcev in 733 samic. Ptice smo vzorčili naključno v agro-ekoloških conah deževnega gozda, degradirane in gvinejske savane v Nigeriji. Spol statistično značilno (p < 0,001) vpliva na morfometrične lastnosti. A...

show abstract

Section: Principal Component Analysis Of Male Muscovy Ducksmentioning

confidence: 99%

Sexual size dimorphism and sex determination by morphometric measurements in locally adapted muscovy duck (Cairina moschata) in Nigeria

Oguntunji

Ayorinde

2015

AAS

View full text Add to dashboard Cite

show abstract

“…Thereafter, more or less coinciding with the popular interest in India generated by the Asian Waterfowl Census in counting waterfowl (Urfi et al 2005), studies on populations and colonization patterns of Painted Stork were undertaken (Urfi 1993). Subsequently, investigations on foraging ecology and behavior (Kalam and Urfi 2008), sexual size dimorphism and its consequences (Urfi and Kalam 2006) and inter-colony variations in nesting parameters in the zoo colonies (Meganathan and Urfi 2009) were investigated.…”

Section: Painted Stork Of Delhi Zoomentioning

confidence: 99%

Using Heronry Birds to Monitor Urbanization Impacts: A Case Study of Painted Stork Mycteria leucocephala Nesting in the Delhi Zoo, India

Urfi

2010

AMBIO

Self Cite

View full text Add to dashboard Cite

“…In the context of foraging, the bill is of primary importance, although it may have other functions such as nest construction and a weapon against rivals (Urfi and Kalam 2006). An adult Painted Stork's bill is large (>24 cm length), waxy yellow in color with a curvature at the tip (Fig.…”

Section: Trophic Adaptations In Mycteria and Other Storksmentioning

confidence: 99%

Foraging Ecology of the Painted Stork (Mycteria leucocephala): A Review

Urfi¹

2011

Waterbirds

View full text Add to dashboard Cite

Sexual Size Dimorphism and Mating Pattern in the Painted Stork (Mycteria leucocephala)

Cited by 20 publications

References 17 publications

Sexual size dimorphism and sex determination by morphometric measurements in locally adapted muscovy duck (Cairina moschata) in Nigeria

Sexual size dimorphism and sex determination by morphometric measurements in locally adapted muscovy duck (Cairina moschata) in Nigeria

Using Heronry Birds to Monitor Urbanization Impacts: A Case Study of Painted Stork Mycteria leucocephala Nesting in the Delhi Zoo, India

Foraging Ecology of the Painted Stork (Mycteria leucocephala): A Review

Contact Info

Product

Resources

About