Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene
Sex determination is important for conservation and population studies, particularly for reproduction programs of threatened species and behavioural ecology. Turdus amaurochalinus, Creamy-bellied Thrush, only exhibits sexual dimorphism during the breeding season, when males are considered to show in...
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| Language: | English |
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Vicerractoría Investigación
2011-06-01
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| Series: | Revista de Biología Tropical |
| Subjects: | |
| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000200020&lng=en&tlng=en |
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| author | Katyucha Von Kossel de Andrade Silva Gisele Lôbo-Hajdu Maria Alice S. Alves |
| author_facet | Katyucha Von Kossel de Andrade Silva Gisele Lôbo-Hajdu Maria Alice S. Alves |
| author_sort | Katyucha Von Kossel de Andrade Silva |
| collection | DOAJ |
| description | Sex determination is important for conservation and population studies, particularly for reproduction programs of threatened species and behavioural ecology. Turdus amaurochalinus, Creamy-bellied Thrush, only exhibits sexual dimorphism during the breeding season, when males are considered to show intense yellow bills, and females and immature males show dark brown bills. The objectives of this study were: 1) to determine the sex of individuals using genetic techniques, and 2) to test the hypothesis that sex dimorphism can be detected by morphometry. This study was carried out at Parque Nacional da Restinga de Jurubatiba, a preserved area located on the North coast of Rio de Janeiro State. The birds were captured using ornithological nets, singly marked with metal rings, weighed, measured and had blood samples collected before being released. The sex of 42 T. amaurochalinus individuals was determined using the CHD gene marker. A total of 20 males and 22 females were identified from June to August, with peak capture frequency in June. Turdus amaurochalinus females and males differed significantly in morphometrical measures. The most important traits to distinguish males from females were wing length (Student t-test=4.34, df=40, p=0.0001) and weight (Student t-test=2.08,df=40, p=0.044): females were heavier and had significantly shorter wing length than males. Females and males were correctly classified in 86% and 75% of cases, respectively, using Discriminant Analysis. The molecular analysis was the most secure method for sex determination in the studied species. Rev. Biol. Trop. 59 (2): 789- 794. Epub 2011 June 01. |
| first_indexed | 2024-03-12T10:28:16Z |
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| id | doaj.art-e3fe3946b7af45059a785fe99cc8ee0a |
| institution | Directory Open Access Journal |
| issn | 0034-7744 |
| language | English |
| last_indexed | 2024-03-12T10:28:16Z |
| publishDate | 2011-06-01 |
| publisher | Vicerractoría Investigación |
| record_format | Article |
| series | Revista de Biología Tropical |
| spelling | doaj.art-e3fe3946b7af45059a785fe99cc8ee0a2023-09-02T09:30:08ZengVicerractoría InvestigaciónRevista de Biología Tropical0034-77442011-06-01592789794S0034-77442011000200020Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD geneKatyucha Von Kossel de Andrade Silva0Gisele Lôbo-Hajdu1Maria Alice S. Alves2Universidade do Estado do Rio de JaneiroUniversidade do Estado do Rio de JaneiroUniversidade do Estado do Rio de JaneiroSex determination is important for conservation and population studies, particularly for reproduction programs of threatened species and behavioural ecology. Turdus amaurochalinus, Creamy-bellied Thrush, only exhibits sexual dimorphism during the breeding season, when males are considered to show intense yellow bills, and females and immature males show dark brown bills. The objectives of this study were: 1) to determine the sex of individuals using genetic techniques, and 2) to test the hypothesis that sex dimorphism can be detected by morphometry. This study was carried out at Parque Nacional da Restinga de Jurubatiba, a preserved area located on the North coast of Rio de Janeiro State. The birds were captured using ornithological nets, singly marked with metal rings, weighed, measured and had blood samples collected before being released. The sex of 42 T. amaurochalinus individuals was determined using the CHD gene marker. A total of 20 males and 22 females were identified from June to August, with peak capture frequency in June. Turdus amaurochalinus females and males differed significantly in morphometrical measures. The most important traits to distinguish males from females were wing length (Student t-test=4.34, df=40, p=0.0001) and weight (Student t-test=2.08,df=40, p=0.044): females were heavier and had significantly shorter wing length than males. Females and males were correctly classified in 86% and 75% of cases, respectively, using Discriminant Analysis. The molecular analysis was the most secure method for sex determination in the studied species. Rev. Biol. Trop. 59 (2): 789- 794. Epub 2011 June 01.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000200020&lng=en&tlng=endeterminación de sexoTurdus amaurochalinusmorfometríagen CHDRestinga de Jurubatiba |
| spellingShingle | Katyucha Von Kossel de Andrade Silva Gisele Lôbo-Hajdu Maria Alice S. Alves Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene Revista de Biología Tropical determinación de sexo Turdus amaurochalinus morfometría gen CHD Restinga de Jurubatiba |
| title | Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene |
| title_full | Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene |
| title_fullStr | Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene |
| title_full_unstemmed | Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene |
| title_short | Sex determination in Turdus amaurochalinus (Passeriformes: Muscicapidae): morphometrical analysis supported by CHD gene |
| title_sort | sex determination in turdus amaurochalinus passeriformes muscicapidae morphometrical analysis supported by chd gene |
| topic | determinación de sexo Turdus amaurochalinus morfometría gen CHD Restinga de Jurubatiba |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000200020&lng=en&tlng=en |
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