A model to search for birth probabilities of mammal populations using fertility data
A model was constructed to predict monthly birth probabilities using mammalian fertility data. We used a sample of 147 female capybaras (Hydrochoerus hydrochaeris) hunted on a farm on Marajó Island, Brazil. In the model each month was treated as a multinomial with six cells representing the six poss...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
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| Series: | Brazilian Journal of Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842009000500017&lng=en&tlng=en |
| _version_ | 1811268234915086336 |
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| author | JR. Moreira M. Eagle OJ. Gillespie A. Davidson FHC. Marriott DW. Macdonald |
| author_facet | JR. Moreira M. Eagle OJ. Gillespie A. Davidson FHC. Marriott DW. Macdonald |
| author_sort | JR. Moreira |
| collection | DOAJ |
| description | A model was constructed to predict monthly birth probabilities using mammalian fertility data. We used a sample of 147 female capybaras (Hydrochoerus hydrochaeris) hunted on a farm on Marajó Island, Brazil. In the model each month was treated as a multinomial with six cells representing the six possible reproductive states (five months gestation). A hypothesis test was carried out to see whether a cosine curve would fit the birth probabilities. The results offer no support for a seasonal component (F2,9 = 1.84, P = 0.21), whereas results from a direct census do (F3,23 = 87.29, P < 0.01). Some hunting techniques were biased towards killing pregnant females (χ(2)1= 7.2, P< 0.01), thereby spreading reproduction throughout the year (F2,9 = 1.84, P = 0.21). The model remained a powerful predictive tool to be used with mammalian fertility data as long as the data are not biased towards pregnant females. |
| first_indexed | 2024-04-12T21:19:08Z |
| format | Article |
| id | doaj.art-6f4ba4f98ea54576aa4bb4210d5720ac |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-04-12T21:19:08Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-6f4ba4f98ea54576aa4bb4210d5720ac2022-12-22T03:16:21ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-43756941127113110.1590/S1519-69842009000500017S1519-69842009000500017A model to search for birth probabilities of mammal populations using fertility dataJR. Moreira0M. Eagle1OJ. Gillespie2A. Davidson3FHC. Marriott4DW. Macdonald5Embrapa Recursos Genéticos e BiotecnologiaUniversity of OxfordUniversity of OxfordUniversity of OxfordUniversity of OxfordUniversity of OxfordA model was constructed to predict monthly birth probabilities using mammalian fertility data. We used a sample of 147 female capybaras (Hydrochoerus hydrochaeris) hunted on a farm on Marajó Island, Brazil. In the model each month was treated as a multinomial with six cells representing the six possible reproductive states (five months gestation). A hypothesis test was carried out to see whether a cosine curve would fit the birth probabilities. The results offer no support for a seasonal component (F2,9 = 1.84, P = 0.21), whereas results from a direct census do (F3,23 = 87.29, P < 0.01). Some hunting techniques were biased towards killing pregnant females (χ(2)1= 7.2, P< 0.01), thereby spreading reproduction throughout the year (F2,9 = 1.84, P = 0.21). The model remained a powerful predictive tool to be used with mammalian fertility data as long as the data are not biased towards pregnant females.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842009000500017&lng=en&tlng=encapybaraHydrochoerus hydrochaerismodelbreeding seasonfertility |
| spellingShingle | JR. Moreira M. Eagle OJ. Gillespie A. Davidson FHC. Marriott DW. Macdonald A model to search for birth probabilities of mammal populations using fertility data Brazilian Journal of Biology capybara Hydrochoerus hydrochaeris model breeding season fertility |
| title | A model to search for birth probabilities of mammal populations using fertility data |
| title_full | A model to search for birth probabilities of mammal populations using fertility data |
| title_fullStr | A model to search for birth probabilities of mammal populations using fertility data |
| title_full_unstemmed | A model to search for birth probabilities of mammal populations using fertility data |
| title_short | A model to search for birth probabilities of mammal populations using fertility data |
| title_sort | model to search for birth probabilities of mammal populations using fertility data |
| topic | capybara Hydrochoerus hydrochaeris model breeding season fertility |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842009000500017&lng=en&tlng=en |
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