63173 20200221144222.0 sideral 97071 doi 10.2527/jas.2016-0605 ART-2016-97071 eng (orcid)0000-0003-3074-5778 Muniesa, A. Universidad de Zaragoza Proposal of a production and management index (PMI) for tilapia farms 2016 Access copy available to the general public Unrestricted Tilapia is one of the most important species in aquaculture; however, there is no available index to show the performance of a production unit. It is desirable to assess the productivity using indexes, such as the production and management index for shrimps and the European production efficacy factor for broilers. These indexes are based on data production: growth, survival, and feed conversion of a full production cycle. Taking into account these parameters, we propose a production and management index (PMI) for tilapia that is applicable for a specific period of the production cycle. For the construction and validation of the PMI we have used production data from 8, 614 monthly records of 2 tilapia farms in Huila Department (Colombia), and because of the complexity of tilapia management, different anomalous situations have been detected and then defined as exceptions. As a result, 419 records were considered extreme values because 1 or more exceptions were met. The value of the PMI varies from 0 (the worst situation) to 3.55, which reflects high variability. We have constructed a PMI for tilapia as the product of 3 elements to obtain a positive value index. Instead of classic parameters, we had to calculate an adapted version of them: the relative average daily growth, the survival (as a complementary value of the estimated monthly mortality), and a feed conversion ratio index. To assess the utility of the PMI, some comparisons were performed using records from black and red tilapia. We observed significant differences depending on tilapia strain (PMIblack = 1.0248 vs. PMIred = 1.1661; P < 0.001), age (better values for small fish), and season (PMIrainy = 1.0847 vs. PMIdry = 1.1011; P = 0.026). According to these results, we can conclude that the PMI could be a useful tool for tilapia farmers, despite the complexity of the calculation. info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.863 2016 AGRICULTURE, DAIRY & ANIMAL SCIENCE 8 / 57 = 0.14 2016 Q1 T1 1.034 2016 Animal Science and Zoology 2016 Q1 Medicine (miscellaneous) 2016 Q1 Food Science 2016 Q1 Genetics 2016 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Rey-Castaño, A. L. (orcid)0000-0002-6314-6395 Ruiz-Zarzuela, I. Universidad de Zaragoza Guarín, M. Iregui, C. (orcid)0000-0002-1204-4356 de Blas, I. Universidad de Zaragoza 1009 773 Universidad de Zaragoza Dpto. Patología Animal Área Sanidad Animal 94, 11 (2016), 4872-4881 J. anim. sci. JOURNAL OF ANIMAL SCIENCE 0021-8812 https://www.animalsciencepublications.org/publications/jas/pdfs/94/11/4872 Texto completo de la revista 658118 http://zaguan.unizar.es/record/63173/files/texto_completo.pdf Versión publicada 110664 http://zaguan.unizar.es/record/63173/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:63173 articulos driver 2020-02-21-13:15:51 ARTICLE