Equine chorionic gonadotrophin (eCG) after weaning in reproductive performance of sows from distinct parturition order

Revista Acadêmica: Ciência Animal

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Title Equine chorionic gonadotrophin (eCG) after weaning in reproductive performance of sows from distinct parturition order
 
Creator Brogni, Cláudio Francisco
Ohlweiler, Lain Uriel
Mezzalira, Joana Claudia
Mezzalira, Alceu
 
Subject Farrowing order. Litter size. Weaning interval.
 
Description The weaning to estrus interval (WEI) and litter size are points that influences sow reproductive parameters and consequently the swine production. This study evaluated the effect of equine chorionic gonadotrophin (eCG), applied 5 hours after weaning, in sows of 1st to 5th parturition order (PO1-5) and sows with parturition order equal to or greater than 6 (PO6+) on reproductive parameters. PO1-5 sows (n = 240) were allocated into three groups: control group (n = 80), received 4 ml of saline solution; eCG800 group (n = 80), received 800 UI of eCG; and eCG1000 group (n = 80), received 1000 UI of eCG. PO6+ sows (n = 160) were allocated in control group (n = 80), receiving 5 ml of saline solution, and eCG1000 group (n = 80), that received 1000 IU of eCG. The estrous duration and litter parameters (mean weight, number of piglets per litter, number of live piglets, stillborn and mummified), insemination number and parturition order were evaluated. Chi-square test and analysis of variance with Tukey test were used in MIXED procedure of statistical package SAS (p < 0.05). An increased estrus duration and a mean increase of 1.5 piglets per litter was observed in eCG1000 group of PO1-5 sows, without affecting their mean weight. For PO6+ sows, the eCG1000 group was increased by one piglet per litter without interfering in the mean weight at birth. The economic analysis revealed a revenue of 400% of eCG investment in the PO1-5 sows, and 268% in the PO6+ group. It was concluded that the use of 1000 UI of eCG improves the reproductive parameters of sows of both (PO1-5 and PO6+) parturition orders.
 
Publisher Editora PUCPRESS
 
Contributor Coordination of Improvement of Higher Education Personnel (CAPES)
 
Date 2020-10-23
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion


 
Format application/pdf
 
Identifier https://periodicos.pucpr.br/index.php/cienciaanimal/article/view/27326
10.7213/2596-2868.2020.18015
 
Source Revista Acadêmica Ciência Animal; v. 18 (2020): n. cont.; 1 - 10
Revista Acadêmica Ciência Animal; v. 18 (2020): n. cont.; 1 - 10
2596-2868
 
Language eng
 
Relation https://periodicos.pucpr.br/index.php/cienciaanimal/article/view/27326/pdf
 
Rights Direitos autorais 2020 Revista Acadêmica Ciência Animal
http://creativecommons.org/licenses/by/4.0
 

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