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The effect of first-lactation calving season, milk production, and morphology on the survival of Simmental cows.
Buonaiuto, G; Visentin, G; Costa, A; Niero, G; Degano, L; Cavallini, D; Mammi, L M E; Palmonari, A; Formigoni, A; Lopez-Villalobos, N.
Afiliación
  • Buonaiuto G; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy.
  • Visentin G; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy.
  • Costa A; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy. Electronic address: angela.costa2@unibo.it.
  • Niero G; Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro (PD), Italy.
  • Degano L; National Association of Italian Simmental Cattle Breeders (ANAPRI), Via Ippolito Nievo, 19, 33100 Udine, Italy.
  • Cavallini D; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy.
  • Mammi LME; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy.
  • Palmonari A; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy.
  • Formigoni A; Department of Veterinary Medical Sciences (DIMEVET), Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell'Emilia (BO), Italy.
  • Lopez-Villalobos N; School of Agriculture and Environment, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand.
Animal ; 18(4): 101128, 2024 Apr.
Article en En | MEDLINE | ID: mdl-38574454
ABSTRACT
Longevity in dairy and dual-purpose cattle is a complex trait which depends on many individual and managerial factors. The purpose of the present study was to investigate the survival (SURV) rate of Italian Simmental dual-purpose cows across different parities. Data of this study referred to 2 173 primiparous cows under official milk recording that calved between 2002 and 2020. Only cows linearly classified for type traits, including muscularity (MU) and body condition score (BCS) were kept. Survival analysis was carried out, through the Cox regression model, for different pairwise combinations of classes of milk productivity MU, BCS, and calving season. Herd-year of first calving was also considered in the model. SURV (0 = culled; 1 = survived) at each lactation up to the 6th were the dependent variables, so that, for example, SURV2 equal to 1 was attributed to cows that entered the 2nd lactation. Survival rates were 98, 71, 63, 56, and 53% for 2nd, 3rd, 4th, 5th, and 6th lactation, respectively. Results revealed that SURV2 was not dependent on milk yield, while in subsequent parities, low-producing cows were characterized by higher SURV compared to high-producing ones. Additionally, cows starting the lactation in autumn survived less (47.38%) than those starting in spring (53.49%), suggesting that facing the late gestation phase in summer could increase the culling risk. The present study indicates that SURV in Italian Simmental cows is influenced by various factors in addition to milk productivity. However, it is important to consider that in this study all first-calving cows culled before the linear evaluation - carried out between mid- and late lactation in this breed - were not accounted for. Finding can be transferred to other dual-purpose breeds, where the cows' body conformation and muscle development - i.e. meat-related features - are often considered as important as milk performance by farmers undertaking culling decisions.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedades de los Bovinos / Leche Límite: Animals / Pregnancy Idioma: En Revista: Animal Año: 2024 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedades de los Bovinos / Leche Límite: Animals / Pregnancy Idioma: En Revista: Animal Año: 2024 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido