Consulta: subjectFacets:"Sexing"
Registros recuperados: 8
Data/hora: 11/06/2024 04:40:28

Sexual size dimorphism in Black-Browed Albatross (Diomedea melanophris) incidentally killed during longline operations
Provedor de dados: 68
Autores: Gandini,Patricia; Frere,Esteban; García,M. Fernanda; Seco Pon,Juan P.
Black-Browed Albatross (Diomedea melanophris) displays little sexual dimorphism and although males are usually larger than females, sexing birds by direct observation is difficult. We evaluated sexual size dimorphism in this species and provided a reliable method to predict the sex of measured birds. Discriminant Analysis of six morphometric measurements of adult birds indicated that only three variables (bill depth, head width and nape) were the most accurate variables to use in a discriminant function model, predicting sex with 87% of reliability.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Argentina; Black-Browed Albatross; Discriminant Analysis; Sexing; Sexual size dimorphism.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072009000100007

Use of the TSPY gene for sexing cattle
Provedor de dados: 74
Autores: Lemos,Daniela Cristina; Rios,Álvaro Fabrício Lopes; Caetano,Lisandra Cristina; Lôbo,Raysildo Barbosa; Vila,Reginaldo Aparecido; Martelli,Lúcia; Takeuchi,Paula Lumy; Ramos,Ester Silveira.
The Y-encoded, testis-specific protein (TSPY) is a Y-specific gene. The copy numbers of TSPY range from 20 to 60 in men and up to 200 in bulls. In this study, we examined the possibility of using the TSPY gene to sex cattle. DNA from blood samples of 100 Nelore cattle (50 males and 50 females) from the Nelore Cattle Breeding Program (PMGRN) was screened for TSPY by PCR using TSPY-specific primers. The assay was highly specific since all male samples were TSPY-positive and all female samples were negative. Positive results were also obtained at low DNA concentrations (less than 1 rhog/muL). These results showed that TSPY was a good male-specific marker, the usefulness of which was enhanced by the high copy number of the gene. This is the first report to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovine; Cattle; PCR; Sexing; TSPY.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100020

Morphological and morphometric analysis of skeletal muscle between male and female young adult Colossoma macropomum (Characiformes: Serrasalmidae)
Provedor de dados: 83
Autores: Mello,Fernanda De; Felippe,Daruzi; Godoy,Leandro C.; Lothhammer,Nívia; Guerreiro,Luis R. J.; Streit Jr.,Danilo P.
ABSTRACT This study aimed to evaluate muscle organization in tambaqui in order to describe the muscle growth process. We analyzed the morphometric pattern of fibers from white muscle of young-adults (300 days) by smaller diameter. The organization of white muscle exhibited a typical morphological pattern found in other fish species. Heavier animals showed higher frequency of larger diameter fibers (&gt;50 μm ) and smaller animals had higher frequency of smaller diameter fibers (&lt;20 μm ) (P =0.005). However, both animals showed the same frequency of intermediate diameter fibers (20-50 μm ). Body weight showed a positive correlation with muscle diameter fiber (r=0.45), being 20-50 μm the diameters that contributed the most to animal weight (P &lt;0.0001)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypertrophy; Hyperplasia; Muscle growth; Sexing; Tambaqui.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200206

Sexing of Dog Sperm by Fluorescence In Situ Hybridization
Provedor de dados: 19
Autores: OI, Maya; YAMADA, Keisuke; HAYAKAWA, Hiroyuki; SUZUKI, Hiroshi; 鈴木, 宏志.
Effective preselection of sex has been accomplished in several species of livestock and also in humans using the flow cytometric sperm sorting method. A guaranteed high sorting accuracy is a key prerequisite for the widespread use of sperm sexing. The standard validation method is flow cytometric remeasurement of the DNA content of the sexed sperm. Since this method relies on the same instrument that produced the original sperm separation, it is not truly independent. Therefore, to be able to specifically produce either male or female offspring in the dog, we developed a method of direct visualization of sex chromosomes in a single sperm using fluorescence in situ hybridization (FISH) as a validation method. Denaturation of canine spermatozoa by immersion...
Palavras-chave: Dog; Fluorescence in situ hybridization (FISH); Sexing; Sperm.
Ano: 2013
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3858

A morphometric method of sexing white layer eggs
Provedor de dados: 89
Autores: Yilmaz-Dikmen,B; Dikmen,S.
The present study was carried out to determine the sex of the fertilized white layer eggs with using morphological measurements. A total of 300 Super Nick White Layer (54 wks of age) eggs were incubated and sexed in the end of incubation period. Before incubation egg length, width and weight were measured. The egg volume and shape index were estimated with using these measurements for each egg. The effect of egg weight and replicate number was not significant on the sex of the hatching chick (p &amp;gt; 0.05). The effects of egg shape index (p = 0.001), egg length (p = 0.0018), egg width (p &lt; 0.01) and volume (p = 0.004) of the egg had significant effect on the sex of hatching chick. According to the results of the current study, morphological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morphometric measurements; Pre-incubation; Sexing; Layer.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300006

Bioimpedance as a Non-Invasive Method to Evaluate Eggs and Poultry
Provedor de dados: 89
Autores: Klein,DR; Vale,MM; Silva,LP; Santos,JPA; Branco,T; Fernandes,MO.
ABSTRACT The need to comply with animal welfare has motivated the research for non-invasive methods that allow the evaluation of poultry and eggs to be painless while providing accurate measurements. In this scenario, bioelectrical impedance was tested as a minimally invasive tool for sexing day-old chicks of two different chicken strains and for evaluating the quality of eggs submitted to different days of storage relative to their hatchability. The resistance and phase angle measured allowed the differentiation between chicken strains, but not between sexes. Eggs stored for seven days showed higher resistance and lower phase angle those stored for only one day. Although the bioimpedance method seems to be a promising method to evaluate egg and chick...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conductance; Day-old chicks; Egg storage; Reactance; Sexing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200203

Morfometria e histologia das gônadas de machos e fêmeas recém-eclodidos de Podocnemis expansa e Podocnemis unifilis (Testudines, Podocnemididae) - doi: 10.4025/actascibiolsci.v34i1.7257
Provedor de dados: 3
Autores: Malvasio, Adriana; Universidade Federal do Tocantins - UFT; Nascimento-Rocha, Josefa Moreira do; Universidade Federal do Tocantins - UFT; Santos, Helcileia Dias; Universidade Federal do Tocantins - UFT; Ataídes, Adson Gomes de; Universidade Federal do Tocantins - UFT; Portelinha, Thiago Costa Gonçalves; Universidade Federal do Tocantins - UFT.
P. expansa e P. unifilis. Todos os espécimes utilizados neste trabalho foram procedentes do rio Javaés, entorno do Parque Nacional do Araguaia, Estado do Tocantins, Brasil. Após estudo sob estereomicroscópio, foram coletadas as gônadas para o procedimento histológico de rotina. Foram analisadas 187 amostras de P. expansa, das quais 81,2% foram identificadas como fêmeas e 18,7% como machos; e 98 de P. unifilis, das quais 31,6% eram fêmeas e 68,4% machos. Não foram verificadas diferenças microscópicas relevantes na sexagem entre estas espécies. Os critérios utilizados no diagnóstico microscópico foram principalmente a morfologia das gônadas, a presença do apêndice no oviduto remanescente, a morfologia do oviduto e as características das células de...
Palavras-chave: 2.04.00.00-4 tartarugas; Sexagem; Ovário; Testículo; Microscopia; Tocantins 2.04.00.00-4 turtles; Sexing; Ovary; Testicle; Microscopy; Tocantins.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7257

Bovine carcass sexing by PCR method
Provedor de dados: 62
Autores: Curi,Rogério Abdallah; Mota,Lígia Souza Lima Silveira da; Amarante,Mônica Regina Vendrame; Lopes,Catalina Romeiro.
The objective of the present study was to develop a methodology that would permit sexing bovine meat ready for commercialization. A male-specific primer sequence was used, followed by analysis of the amplified product. The method proved to be efficient for sex verification and is of practical utility in the prevention of fraud in beef sale.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovine; Carcass; Sexing; PCR.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962002000300007