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Fitting the truncated negative binomial distribution to count data A comparison of estimators, with an application to groundfishes from the Mauritanian Exclusive Economic Zone ArchiMer
Mante, Claude; Kide, Saikou Oumar; Yao-lafourcade, Anne-francoise; Merigot, Bastien.
Modeling empirical distributions of repeated counts with parametric probability distributions is a frequent problem when studying species abundance. One must choose a family of distributions which is flexible enough to take into account very diverse patterns and possess parameters with clear biological/ecological interpretations. The negative binomial distribution fulfills these criteria and was selected for modeling counts of marine fish and invertebrates. This distribution depends on a vector of parameters, and ranges from the Poisson distribution (when ) to Fisher's log-series, when . Moreover, these parameters have biological/ecological interpretations which are detailed in the literature and in this study. We compared three estimators of K, and the...
Tipo: Text Palavras-chave: Birth-and-dead models; Habitat; Log-series; Minimum Hellinger distance; Negative binomial; Species abundance.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00352/46332/74377.pdf
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Maximum simulated likelihood estimation of a negative binomial regression model with multinomial endogenous treatment AgEcon
Deb, Partha; Trivedi, Pravin K..
We describe specification and estimation of a multinomial treatment effects negative binomial regression model. A latent factor structure is used to accommodate selection into treatment, and a simulated likelihood method is used for estimation. We describe its implementation via the mtreatnb command.
Tipo: Journal Article Palavras-chave: Mtreatnb; Multinomial treatment effects; Latent factors; Count data; Negative binomial; Multinomial logit; Multinomial logistic; Halton sequences; Maximum simulated likelihood; Research Methods/ Statistical Methods.
Ano: 2006 URL: http://purl.umn.edu/117575
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Spatial distribution and control levels of Anastrepha spp. (Diptera: Tephritidae) in guava orchards Anais da ABC (AABC)
NICÁCIO,JOSÉ; OLIVEIRA,ISAIAS DE; UCHOA,MANOEL A.; FACCENDA,ODIVAL; ABOT,ALFREDO R.; FERNANDES,MARCOS G.; GARCIA,FLÁVIO R.M..
Abstract: This study aimed to know the patterns of spatial distribution of Anastrepha spp. and establish a criterion for determining the appropriate time for pest control. For this, 90 McPhail traps were used as Sampling Units (SU) divided into three commercial orchards of Novo Milênio guava with a total area of 14 ha. Traps were interspersed between the rows of plants, systematically in the orchards, hung and baited with 5% hydrolyzed corn protein with weekly collections. We caught 8,170 Anastrepha spp. in 840 SU. The mean infestation index was compared to the three types of distribution: random, uniform, aggregate, and fit by the theoretical frequency distributions of Poisson, negative binomial and positive binomial. The populations of Anastrepha...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Index of aggregation; Negative binomial; McPhail trap; Fruit pests.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500854
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SPATIAL DISTRIBUTION AND SEQUENTIAL SAMPLING OF Brevipalpus phoenicis IN CITRUS Rev. Bras. Frutic.
MALDONADO JR,WALTER; BARBOSA,JOSÉ CARLOS; COSTA,MARÍLIA GREGOLIN; GONÇALVES,PAULO CÉSAR TIBURCIO; SANTOS,TIAGO ROBERTO DOS.
ABSTRACT Among the pests of citrus, one of the most important is the red and black flat mite Brevipalpus phoenicis (Geijskes), which transmits the Citrus leprosis virus C (CiLV-C).When a rational pest control plan is adopted, it is important to determine the correct timing for carrying out the control plan. Making this decision demands constant follow-up of the culture through periodic sampling where knowledge about the spatial distribution of the pest is a fundamental part to improve sampling and control decisions. The objective of this work was to study the spatial distribution pattern and build a sequential sampling plan for the pest. The data used were gathered from two blocks of Valencia sweet orange on a farm in São Paulo State, Brazil, by 40...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Red and black flat mite; Negative binomial; Poisson distribution; Decision making; Integrated pest management.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000400401
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Wilderness and Primitive Area Recreation Participation and Consumption: An Examination of Demographic and Spatial Factors AgEcon
Bowker, James Michael; Murphy, D.; Cordell, H. Ken; English, Donald B.K.; Bergstrom, John C.; Starbuck, C. Meghan; Betz, Carter J.; Green, Gary T..
This paper explores the influence of demographic and spatial variables on individual participation and consumption of wildland area recreation. Data from the National Survey on Recreation and the Environment are combined with geographical information system-based distance measures to develop nonlinear regression models used to predict both participation and the number of days of participation in wilderness and primitive area recreation. The estimated models corroborate previous findings indicating that race (black), ethnicity (Hispanic), immigrant status, age, and urban dwelling are negatively correlated with wildland visitation, while income, gender (male), and education positively affect wildland recreation participation and use. The presence of a...
Tipo: Journal Article Palavras-chave: Logistic; Negative binomial; Participation; Recreation; Visits; Wilderness; Environmental Economics and Policy; Land Economics/Use; Q21; Q26; Q24.
Ano: 2006 URL: http://purl.umn.edu/43765
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