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AGGIORNAMENTO SCIENTIFICO PERMANENTE IN MEDICINA VETERINARIA

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  Riviste Italiane Indicizzate

Cinologia
Collana di Radiologia Clinica Ippologia
Large Animals Review
Medicina Felina
Notiziario Farmaceutico
Quaderni di Dermatologia
SISCA Observer


Totale Riviste pubblicate : 4831. Questa pagina mostra gli ultimi lavori inseriti.

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Sabato, 06 Aprile 2019

Abecia J.A. et al

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Goats kidding females produce more milk, fat, protein and lactose than goats kiddind males  

  • Riferimento: Large Animal Review 2018; 24: 143-147
  • Abstract: Introduction - Recently, we reported the first evidence that sheep that give birth to female lambs produce more milk than do ewes that give birth to male lambs. However, little is known about the influence of offspring gender on milk production in goats. Aim - To quantify the effects of the number and gender of kids on the milk production of Florida goats based on 39,856 milking periods. Material and methods - Milking length (ML), total milk yield (TMY) and daily milk yield (DMY) were calculated, and the percentages of fat, protein, lactose, and dry extract, and the somatic cell count (SCC) were quantified. Total fat (TF), total protein (TP), and total lactose (TL) production were also calculated. Results and discussion - Number of parturition, litter size and offspring gender had a significant effect (P<0.001) on all the milk parameters under study, except the percentages of lactose and dry extract for offspring gender. Goats that had twins or triplets produced more milk (P<0.001) that had more fat (P<0.05) and protein (P<0.01), a higher SCC (P<0.001), and produced more TF, TP, and TL (P<0.001) than did goats that had a singleton. Goats that kidded a female singleton had significantly higher TMY (P<0.01) and DMY (P<0.001) than did goats that kidded a male singleton, with more fat (P<0.01) and less protein (P<0.01). Goats that produced female-only litters had higher DMY, TP, and TL (P<0.01) than did those that had maleonly litters. Goats that had litters that included females yielded more milk (P<0.001), which had more fat (P<0.01), a higher TF (P<0.01), and less protein (P<0.01) but higher TP and TL production (P<0.001) than litters with no females; this effect was evident up to the third or fourth parturition, depending on milk parameter. Conclusion - Florida goats that had multiple births produced more milk than did goats that gave birth to singletons, and the presence of female kids in litters had a positive effect on milk yield and quality because litters that included females gave rise to higher fat, protein and lactose production. These results suggest new possibilities for increasing the profitability of dairy farms through the selection of offspring gender, which sex-specific semen can facilitate.
  • Note: //
  • Specie: animali da reddito
  • Anno: 2018
  • Rivista: Large Animals Review
Letto 493 volte Ultima modifica il Sabato, 06 Aprile 2019

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