Exploratory study on characteristics of oyster shell and eggshell quality in Chile

Arenas, Carolina; Hidalgo, Marcelo; Hidalgo, Héctor; Valenzuela, Carolina

dc.creator	Arenas, Carolina
dc.creator	Hidalgo, Marcelo
dc.creator	Hidalgo, Héctor
dc.creator	Valenzuela, Carolina
dc.date	2018-09-14
dc.date.accessioned	2020-07-14T19:03:40Z
dc.date.available	2020-07-14T19:03:40Z
dc.identifier	http://revistas.uach.cl/index.php/australjvs/article/view/3593
dc.identifier	10.4067/S0719-81322018000300149
dc.identifier.uri	https://revistaschilenas.uchile.cl/handle/2250/143706
dc.description	This study aimed to characterise oyster shell and white egg shell quality in Chile. The work was based on samples of both oyster shell and eggs, which were sourced from 7 laying farms over a period of several weeks during the production stage. Oyster shells were characterised according to their calcium content and granulometric distribution, and were classified in three types of particles (mm): coarse (≥1.7), medium-sized (0.9-1.6) and fine (≤0.8). Eggs were characterised, according to hen age and farm, by determining their weight, eggshell resistance, and thickness. Currently, Chilean farms use oyster shells whose calcium content ranges from 32.5% to 34.8%, and their granulometric distribution is 51.7% coarse, 27.6% medium-sized and 18.1% fine particles. Thus, the predominant form of oyster shell traded by major companies in Chile is the coarse type of particles, followed by medium-sized and fine particles. Similar calcium contents were observed for oyster shell samples sourced from different farms. Similar weight of the eggs were found for all farms (60-64 g). Contrarily, farms presented different results for eggshell resistance (3,934-5,057 g) and eggshell thickness (0.322-0.376 mm). Eggshell resistance and thickness values were within the expected range for white hen eggs.	en-US
dc.description	This study aimed to characterise oyster shell and white egg shell quality in Chile. The work was based on samples of both oyster shell and eggs, which were sourced from 7 laying farms over a period of several weeks during the production stage. Oyster shells were characterised according to their calcium content and granulometric distribution, and were classified in three types of particles (mm): coarse (≥1.7), medium-sized (0.9-1.6) and fine (≤0.8). Eggs were characterised, according to hen age and farm, by determining their weight, eggshell resistance, and thickness. Currently, Chilean farms use oyster shells whose calcium content ranges from 32.5% to 34.8%, and their granulometric distribution is 51.7% coarse, 27.6% medium-sized and 18.1% fine particles. Thus, the predominant form of oyster shell traded by major companies in Chile is the coarse type of particles, followed by medium-sized and fine particles. Similar calcium contents were observed for oyster shell samples sourced from different farms. Similar weight of the eggs were found for all farms (60-64 g). Contrarily, farms presented different results for eggshell resistance (3,934-5,057 g) and eggshell thickness (0.322-0.376 mm). Eggshell resistance and thickness values were within the expected range for white hen eggs.	es-ES
dc.format	application/pdf
dc.language	eng
dc.publisher	Facultad de Ciencias Veterinarias - Universidad Austral de Chile	es-ES
dc.relation	http://revistas.uach.cl/index.php/australjvs/article/view/3593/4467
dc.rights	Derechos de autor 2018 Austral Journal of Veterinary Sciences	es-ES
dc.source	Austral Journal of Veterinary Sciences; Vol. 50 Núm. 3 (2018); 143-147	en-US
dc.source	Austral Journal of Veterinary Sciences; Vol. 50 Núm. 3 (2018); 143-147	es-ES
dc.source	0719-8132
dc.source	0719-8000
dc.title	Exploratory study on characteristics of oyster shell and eggshell quality in Chile	en-US
dc.title	Exploratory study on characteristics of oyster shell and eggshell quality in Chile	es-ES
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion

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