Please use this identifier to cite or link to this item:
Title: Protein and energy requirements of castrated male Saanen goats
Contributor(s): Ferreira, Angela Cristina Dias (author); Yanez, Enrique Alejandro (author); de Medeiros, Ariosvaldo Nunes (author); de Resende, Kleber Tomas (author); Pereira Filho, J M (author); Machado da Rocha Fernandes, Marcia Helena (author); Almeida, Amelia Katiane  (author)orcid ; Molina de Almeida Teixeira, Izabelle Auxiliadora (author)
Publication Date: 2015-01
Early Online Version: 2014-11-08
DOI: 10.1016/j.smallrumres.2014.10.017
Handle Link:
Abstract: A comparative slaughter trial was conducted to determine the energy and protein requirements for growth of castrated male Saanen goats weighing from 20 to 35 kg body weight (BW). Regarding maintenance requirements, 36 castrated male Saanen goats with an initial BW of 20.7 ± 0.5 kg, and aged 3.3 ± 0.6 months, were used. Nine animals were randomly chosen and slaughtered at the beginning of the experimental phase (BW of 21.0 ± 0.4 kg), representing the baseline (BL) group. The 27 remaining castrated male goats were pair-fed into nine groups (blocks) of three animals each, fed either ad libitum or restricted to 30 or 60% of ad libitum intake. A group was slaughtered when the animal fed ad libitum reached 35 kg BW. Regarding requirements for gain, 27 castrated male Saanen goats were fed ad libitum and nine were slaughtered at 21.0 ± 0.4 kg BW, nine at 27.7 ± 0.5 kg BW and nine at 35.1 ± 0.3 kg BW. The BL and ad libitum-fed animals used to determine maintenance requirements were also used to estimate gain requirements. The net energy (NE) requirement for maintenance was 261.5 kJ/kg0.75 BW. The metabolizable energy (ME) requirement for maintenance was 404.2 kJ/kg0.75 BW; therefore, the partial efficiency of use of ME for NE was 0.65. The minimal endogenous N losses were 262 ± 48.4 mg N/kg0.75 empty BW (EBW), corresponding to a net protein requirement for maintenance of 1.39 ± 0.257 g/kg0.75 BW. The net energy for gain increased by approximately 40% (from 12 to 17 MJ/kg EBW gain) and the net protein for gain slightly decreased by 3% (from 166 to 160 g/kg EBW gain) as the BW increased from 20 to 35 kg. Our study contributes to the improvement of goat nutrition because it provides estimates of the protein and energy requirements of castrated male Saanen goats.
Publication Type: Journal Article
Source of Publication: Small Ruminant Research, 123(1), p. 88-94
Publisher: Elsevier BV
Place of Publication: Netherlands
ISSN: 0921-4488
Fields of Research (FoR) 2008: 070299 Animal Production not elsewhere classified
Fields of Research (FoR) 2020: 300399 Animal production not elsewhere classified
Socio-Economic Objective (SEO) 2008: 830310 Sheep - Meat
Socio-Economic Objective (SEO) 2020: 100412 Sheep for meat
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

Files in This Item:
1 files
File SizeFormat 
Show full item record


checked on Sep 23, 2023

Page view(s)

checked on Mar 8, 2023


checked on Mar 8, 2023
Google Media

Google ScholarTM



Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.