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Energy expenditure in vocalizations of pigs under stress REA
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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Identification of acoustic parameters for broiler welfare estimate REA
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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Merging SeaWiFS and MODIS/Aqua Ocean Color Data in North and Equatorial Atlantic Using Weighted Averaging and Objective Analysis ArchiMer
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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Sea surface state measured using GPS reflected signals - art. no. 2122 ArchiMer
Rius, Antonio; Aparicio, Josep; Cardellach, Estel; Martin Neira, Manuel; Chapron, Bertrand.
We discuss an airborne experiment aimed to establish the potential of the PARIS concept (PAssive Reflectometry and Interferometry System) to retrieve small features in the sea surface topography. The date and location were chosen to coincide with a TOPEX/POSEIDON (T/P) overflight. The signals of the Global Positioning System (GPS) reflected off the sea surface are tracked and compared to the directly received ones, to compute the relative delays. The features detected in the peak tracking are likely caused by topographic and sea roughness variations. While very promising, these results open the challenge to use additional information to appropriately separate both contributions.
Tipo: Text Palavras-chave: Signal analysis; Reflectrometry; Inerferometry; Sea surface topography.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-766.pdf
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Vocalization of broilers can be used to identify their sex and genetic strain REA
PEREIRA,ERICA M.; NÄÄS,IRENILZA DE A.; GARCIA,RODRIGO G..
In order to reach higher broiler performance, farmers target losses reduction. One way to make this possible is by rearing sexed broilers as male and female present diverse performance due to their physiological differences. Birds from different genetic strain also have a distinct performance at the same age. Considering that sexed flocks may present higher performance this study aimed to identify one-day-old chicks’ sex throughout their vocalization. This research also investigated the possibility of identifying the genetic strain by their vocalization attributes. A total of 120 chicks, half of them were from Cobb® genetic strain and the other half from Ross® genetic strain. From each group, a total of 30 were males and 30 females, which were previously...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Signal analysis; Sex identification; Bioacoustics.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000200192
Registros recuperados: 5
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