Abstract: During a three year trial, 380 corpora lutea were found in lactating buffaloes and the ratios of not pregnant buffaloes/corpora lutea (NP/CL) were analysed by chi-square test between: years (1999 vs. 2000 vs. 2001), days open (<120 days vs. >120 days; DO1 and D02 groups respectively), January March vs. April August calving periods, presence vs. absence of swimming-pool (G1 group us. G2 group respectively). Data were analysed by chi-square test. NP/CL ratios increased throughout the years (7.53%(A) vs. 26.32%(Bb) us. 41.73%(Bc) in 1999, 2000 and 2001 respectively) due to a progressive paddock overcrowding and were higher in D02 groups and during the January-March period. The swimming pool presence was able to reduce significantly the NP/CL incidence (18.01%(A) vs. 33.14%(B) in G1 and G2 groups, respectively) with a significant effect only in the April-August period (18.62%(A) vs. 34.96%(B) in G1 and G2 respectively). NP/CL ratio, as expression of anomalous oestrous cycle and embryonic mortality, may be proposed as a specific tool for evaluating buffalo welfare.
Incidence of pregnancy failures in buffaloes with different rearing system / DI PALO, Rossella; B., Ariota; F., Zicarelli; M., DE BLASI; G., Zicarelli; Gasparrini, Bianca. - In: ITALIAN JOURNAL OF ANIMAL SCIENCE. - ISSN 1594-4077. - STAMPA. - 8:(2009), pp. 619-621.
Incidence of pregnancy failures in buffaloes with different rearing system
DI PALO, ROSSELLA;GASPARRINI, BIANCA
2009
Abstract
Abstract: During a three year trial, 380 corpora lutea were found in lactating buffaloes and the ratios of not pregnant buffaloes/corpora lutea (NP/CL) were analysed by chi-square test between: years (1999 vs. 2000 vs. 2001), days open (<120 days vs. >120 days; DO1 and D02 groups respectively), January March vs. April August calving periods, presence vs. absence of swimming-pool (G1 group us. G2 group respectively). Data were analysed by chi-square test. NP/CL ratios increased throughout the years (7.53%(A) vs. 26.32%(Bb) us. 41.73%(Bc) in 1999, 2000 and 2001 respectively) due to a progressive paddock overcrowding and were higher in D02 groups and during the January-March period. The swimming pool presence was able to reduce significantly the NP/CL incidence (18.01%(A) vs. 33.14%(B) in G1 and G2 groups, respectively) with a significant effect only in the April-August period (18.62%(A) vs. 34.96%(B) in G1 and G2 respectively). NP/CL ratio, as expression of anomalous oestrous cycle and embryonic mortality, may be proposed as a specific tool for evaluating buffalo welfare.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
