Milk yield estimation during suckling using the double oxytocin injection-milking and the double weighing–suckling methods in dairy goats

Abstract

ElsevierFernández Martínez, N.; Balasch Parisi, S.; Pérez Baena, I.; Rodríguez Garcia, M.; Peris Ribera, CJ. (2013). Milk yield estimation during suckling using the double oxytocin injectionmilking and the double weighing-suckling methods in dairy goats. ABSTRACT:The aim was to verify the validity of the double oxytocin-milking 38 (DOT) method as milk yield estimator during the suckling period of lactating dairy 39 goats. To this end, it was necessary to determine whether the weighing-suckling-40 weighing (WSW) and DOT methods of milk yield estimation satisfied the criteria to be 41 considered valuable, the accuracy between both methods and the suitability of DOT to 42 evaluate actual milk. At parturition, sixty lactating Murciano-Granadina breed goats 43 were separated into 2 groups, in mixed (MS; n = 24) and artificial rearing (ARS; n = 44 36) management systems. Until the sixth wk of lactation (weaning), MS goats suckled 45 one kid while kids from ARS goats were artificially reared; moreover, goats in both 46 systems were submitted to once-a-day milking. Once per wk, actual milk yield for ARS 47 goats and potential milk yield were recorded using DOT method for all goats, except for 48 12 goats in ARS which remained as a control. Twelve goats from each management 49 system were used to evaluate diurnal variation in milk production (DVM) by DOT 50 method for 6 consecutive days in wk 4 of lactation. No difference in DVM was found 51 by DOT method in 4-h milk production of goats in MS (P = 0.099) or ARS (P = 0.220), 52 which allowed sixfold multiplication of milked milk volume to obtain potential milk per 53 day. ARS goats subjected to a weekly DOT and control group goats showed a similar 54 (P = 0.379) lactation curve for the first 6 wks of lactation. The DOT method slightly 55 overestimated (3.4%, P = 0.005) the milk yield evaluated by WSW method for goats 56 under an MS, but fitted the actual milk obtained by common milk records for the group 57 of goats in an ARS submitted to the DVM test (P = 0.357) and the group in ARS alone 58 (P = 0.163). The DOT method applied for 8 consecutive days led to a drop of 6 to 12% 59 in milk yield during the following week for both production systems. In conclusion, 60DOT was an accurate method to estimate milk yield during the first weeks of lactation 61 both in MS and ARS under the conditions of this experiment. 62 3

Productive potential of local grazing does and their offspring under a pre and post–partum feeding supplementation program

“…No interaction effects or differences (P>0.05) were found for KWB between treatments, neither between sex of the progeny, nor in KAS At kidding, sex (male, female), birth type (single, double) and birth weight (KWB) of the offspring were measured. In the does, LW, BCS, milk production (DMP) and quality were measured 7 d after kidding, weekly between 6:00 and 8:00 h. Milk production (MP) was evaluated from the 7 th d after kidding to ensure adequate colostrum consumption by the kids and was recorded using the weigh-sucklingweigh technique [13]. For this, the offspring were separated from their mother the afternoon before weighing (around 18:00 h).…”

Quantification of oxytocin residues in dairy milk from Sindh, Pakistan

“…Many studies have reported the effects of OT over the composition of milk and its mineral content. In addition, it is also known to enhance the milk let down of various mammals (Allen, 1990;Fern andez et al, 2013). Although some reports are available for the determination of OT from Indian subcontinent, there are still no studies from Pakistan.…”

Rendimiento y composición láctea de la cabra Roja de Kalahari y rendimiento de sus cabritos en la zona húmeda

“…However, there is a growing awareness of the importance of goats as a source of milk for man (Malau-Aduli et al, 2004). In some tropical and temperate countries, the Jonica, Payoya, Moxoto, Murciano-Granadina and few other breeds are used for milk production (Laudadio and Tufarelli, 2010;Delgado-Pertinez et al, 2009;Queiroga et al, 2009;Fernandez et al, 2013). Although, there is an affinity for milk products in the country; the dairy industry still remains rural and traditional with Fulani pastoralists controlling more than 95 percent of the national herd.…”