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| Pereira,Erica M.; Nääs,Irenilza de A.; Garcia,Rodrigo G.. |
| Estimates of broiler welfare have subjective character. Nowadays, researchers seek non-invasive features or indicators that may describe this condition in animal production. The aim of this study was to identify acoustic parameters to estimate broiler welfare using the following five vocalization acoustic parameters: energy, spectral centroid, bandwidth, first formant, and second formant. The database that generated the model was obtained from a field experiment with 432 broilers, which half were Cobb® and half, Ross® breed, from day 21 to 42, containing bird vocalizations under either welfare or stress conditions. The results of the experiment generated responses to the tested conditions of gender, genetic strain, and welfare. The proposed model was based... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Signal analysis; Broiler production; Algorithm. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300004 |
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| Cordeiro,Alexandra F. da S.; Naas,Irenilza A.; Medeiros,Brenda B.; Maia,Ana Paula de A.; Pereira,Erica M.. |
| Modern swine production faces many challenges nowadays, among which are productivity growth, meat quality improvement, decrease of environmental damage and reduction of cost production. Pigs spend energy to vocalizing, especially when they undergo stress. The waste of energy can increase the cost of production and lead to greater environmental damage. The goal of this study was to estimate the energy spent by pigs under the stress of castration and its effect on the animals' weight gain. Two groups of ten animals each were castrated, being one group with local anesthetic and the other without anesthetic. The piglets' vocalizations were recorded during different stages of the neutering process and then estimated of the amount of energy emitted during each... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal well-being; Signal analysis; Swine production. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500001 |
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| Pottier, C; Garcon, V; Larnicol, G; Sudre, J; Schaeffer, P; Le Traon, Pierre-yves. |
| Two approaches of ocean color data merging were tested and compared in the North and Equatorial Atlantic Basin: the weighted averaging and the objective analysis. The datasets used were the daily level-3 binned data of chlorophyll-a from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer on the Aqua satellite over the year 2003, which is the first common full year of operation. Since they represent input for both approaches, matchups between the satellite and the in situ data from the SeaWiFS Bio-optical Archive and Storage System and the Atlantic Meridional Transect were first studied to compute a spatial map of the root mean-square error and of the bias. Because of the log distribution of the chlorophyll... |
| Tipo: Text |
Palavras-chave: Signal analysis; Sea surface; Marine vegetation; Biology. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3631.pdf |
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