EFFECTS OF FIXED AND RANDOM FACTORS ON BIRTH AND WEANING WEIGHT IN GUINEA PIGS OF THE CENTRAL COAST OF PERU

Authors

  • Humberto Rodríguez L. Facultad de Zootecnia, Universidad Nacional Agraria La Molina, Lima
  • Mabel Palomino T. Facultad de Zootecnia, Universidad Nacional Agraria La Molina, Lima
  • Víctor Hidalgo L. Facultad de Zootecnia, Universidad Nacional Agraria La Molina, Lima
  • Gustavo Gutiérrez R. Facultad de Zootecnia, Universidad Nacional Agraria La Molina, Lima

DOI:

https://doi.org/10.15381/rivep.v24i1.1647

Keywords:

guinea pig, mixed model, birth weight, weaning weight

Abstract

The purposes of this study were a) to evaluate the effect of random factors such as litter (L) and fixed effects such as season (S), calf sex (CS), and parity (P) on birth weight (BW) and weaning weight (WW); and b) to estimate the phenotypic correlation between BW and WW. The study was conducted in the Cieneguilla guinea pig farm of the Universidad Nacional Agraria La Molina. The data comprised 5460 and 3514 records for BW and WW respectively of improved guinea pigs. The data was collected from January 2009 to July 2010. Weaning was at 14 days of age. The feeding system was based on broccoli crop residues (Brassica oleracea italica) and concentrate. SAS MIXED procedure (v 9.1) was used to analyze the mixed models. Total born (TB) was used as covariate for BW and born alive (BA) and age of weaning (AW) were used as covariate for WW. BW was influenced (p<0.01) by TB, S, CS and P, and WW was influenced (p<0.001) by BA, AW, S, P and P*S interaction. The phenotypic correlation of BW and WW was 0.64 (p<0.01). Litter variance was 54 and 60% of total variance for BW and WW respectively.

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Published

2013-03-18

Issue

Vol. 24 No. 1 (2013)

Section

Artículos Primarios

License

Copyright (c) 2013 Humberto Rodríguez L., Mabel Palomino T., Víctor Hidalgo L., Gustavo Gutiérrez R.

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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How to Cite

Rodríguez L., H., Palomino T., M., Hidalgo L., V., & Gutiérrez R., G. (2013). EFFECTS OF FIXED AND RANDOM FACTORS ON BIRTH AND WEANING WEIGHT IN GUINEA PIGS OF THE CENTRAL COAST OF PERU. Revista De Investigaciones Veterinarias Del Perú, 24(1), 16-24. https://doi.org/10.15381/rivep.v24i1.1647