




Doray, Mathieu; Mahevas, Stephanie; Trenkel, Verena. 
Few analyses have been performed to estimate the efficiency of trawls targeting demersal fish using the ratio of catches and acoustic densities. In summer 2006, acoustic and fishing data were collected simultaneously over 3 d by three fishing vessels equipped with identical pelagic trawls in the Bay of Biscay. Variography identified moderate spatial autocorrelation in the acoustic backscatter at a mean scale of 3 km, a scale slightly smaller than the mean haul length (3.5 km), indicating that fish horizontal availability did not influence trawl efficiency. Acoustic backscattering densities expressed as nautical area scattering coefficients (NASCs) recorded in the trawled layer were compared with equivalent NASC (ENASC) values calculated from the species... 
Tipo: Text 
Palavraschave: Availability; Bay of Biscay; Catchability; Generalized linear model; Geostatistics; Hake; Vulnerability. 
Ano: 2010 
URL: http://archimer.ifremer.fr/doc/00002/11372/7980.pdf 
 

 


Silva,Edilson Marcelino; Furtado,Thais Destefani Ribeiro; Fernandes,Jaqueline Gonçalves; Cirillo,Marcelo Ângelo; Muniz,Joel Augusto. 
ABSTRACT: Coffee crops play an important role in Brazilian agriculture, with a high level of social and economic participation resulting from the jobs created in the supply chain and from the income obtained by producers and the revenue generated for the country from coffee bean export. In coffee plant growth, leaves have a determinant role in higher production; therefore, the leaf count per plant provides relevant information to producers for adequate crop management, such as foliar fertilizer applications. To describe count data, the Poisson model is the most commonly employed model; when count data show overdispersion, the negative binomial model has been determined to be more adequate. The objective of this study was to compare the fitness of the... 
Tipo: Info:eurepo/semantics/article 
Palavraschave: Poisson model; Negative binomial model; Exponential family; Generalized linear model. 
Ano: 2019 
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S010384782019000400201 
 

 


Silva,Fabyano Fonseca; Tunin,Karen P.; Rosa,Guilherme J.M.; Silva,Marcos V.B. da; Azevedo,Ana Luisa Souza; Verneque,Rui da Silva; Machado,Marco Antonio; Packer,Irineu Umberto. 
Nowadays, an important and interesting alternative in the control of tickinfestation in cattle is to select resistant animals, and identify the respective quantitative trait loci (QTLs) and DNA markers, for posterior use in breeding programs. The number of ticks/animal is characterized as a discretecounting trait, which could potentially follow Poisson distribution. However, in the case of an excess of zeros, due to the occurrence of several noninfected animals, zeroinflated Poisson and generalized zeroinflated distribution (GZIP) may provide a better description of the data. Thus, the objective here was to compare through simulation, Poisson and ZIP models (simple and generalized) with classical approaches, for QTL mapping with counting phenotypes... 
Tipo: Info:eurepo/semantics/article 
Palavraschave: Dairy; Cattle; Tick infestation; QTL regression; Generalized linear model. 
Ano: 2011 
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S141547572011000400008 
 


