Data/hora: 11/06/2024 05:52:48

Provedor de dados: | 3
País: | Brazil

Título:

Environmental and dam effects on cannibalism in Wistar rat litters

Environmental and dam effects on cannibalism in Wistar rat litters

Autores: | Tarôco, Graziela; Gaya, Leila de Genova; Resende, Daniela Regina; Santos, Ivan Carlos dos; Madureira, Ana Paula.
Data: | 2015-08-06
Ano: | 2015
Palavras-chave: | Laboratory animals; Maternal behavior; Infanticide; Rodents laboratory animals; Maternal behavior; Infanticide; Rodents.
Resumo: | The factors related to cannibalistic behavior of dams in a Wistar rat colony are identified and analyzed. The maternal genetic effects were tested as a random effect by the method of generalized linear models. The season at parturition, the dam´s age at parturition and the density of the room at parturition were tested as fixed effects, whereas the litter size at birth was tested as a co-variable. The genetic effect of the dam was significant for the number of cannibalized pups. Although the season at parturition, the dam´s age and room density on the day of parturition were not individually significant (p &gt; 0.05), most of the interactions between the variation sources were significant (p &lt; 0.05). Cannibalism occurred mostly in dams aged over 241 days, with parturition during spring. So that occurrences of cannibalism could be avoided, dams with the smallest number of cannibalized pups should be selected, coupled to dams younger than 241 days, breeding during spring. The above strategies may reduce the number of couples in the vivarium and increase their production efficiency.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/23015

10.4025/actascibiolsci.v37i2.23015

Editor: | Universidade Estadual De Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/23015/pdf_59
Formato: | application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; v. 37, n. 2 (2015); 225-229

Acta Scientiarum. Biological Sciences; v. 37, n. 2 (2015); 225-229

1807-863X

1679-9283