Theoretical Properties of the Weighted Feller-Pareto Distributions

In this paper, for the first time, a new six-parameter class of distributions called weighted Feller-Pareto (WFP) and related family of distributions is proposed. This new class of distributions contains several other Pareto-type distributions such as length-biased (LB) Pareto, weighted Pareto (WP I, II, III, and IV), and Pareto (P I, II, III, and IV) distributions as special cases. The pdf, cdf, hazard and reverse hazard functions, monotonicity properties, moments, entropy measures including Renyi, Shannon and s-entropies are derived

Assessment of heavy metal concentrations in imported marine fish species consumed in Ogun state, Nigeria

Fish is an affordable protein source in developing countries such as Nigeria, however, human activities like mining, agriculture, and industrial discharges negatively impact these aquatic resources and their environment. Heavy metals leach into the ocean and accumulate in fish, potentially causing health issues for those who consume them. The present study evaluated the heavy metal concentrations in five commercially important and highly consumed fish species (Clupea pallasii, Merluccius productus, Gadus chalcogrammus, Scomber scombrus, Trachurus murphyi) in Nigeria. The study was conducted between August 2021 to January 2022, and Mn, Fe, Zn, Pb, Cd levels were sampled in a total of 50 fish using the AA 240 Fanst Sequential Atomic Absorption Spectrophotometer and expressed as mg/kg wet weight. Among the heavy metals estimated in all fish samples, Mn was the most prevalent, while Zn was relatively the lowest. Pb (6.39 mg/kg), Cd (1.39 mg/kg), and Fe (5.59 mg/kg) concentrations exceeded the FAO and WHO regulatory limits and may be deleterious to human health. Therefore, while essential as a protein source, the presence of heavy metals exceeding recommended limits in these commonly consumed imported fish species raises public health concerns. This study emphasizes the crucial need for stricter regulations and consistent monitoring of imported fish to guarantee their safety and consumer well-being in Nigeria

Genetic analysis of the reproductive performance of West African Dwarf goats in the humid tropics

A total of 587 kidding records of the West African Dwarf (WAD) goats over a period of 10 years (1982-91) were used for this study. The mean kidding interval and litter size at birth were 275.68±6.08 days and 1.79±0.05 kids, respectively. Effect of parity, season and year of birth were significant (P<0.05) for kidding interval. Parity also had significant effect (P<0.05) on litter size at birth. Heritability estimates of 0.35±0.05 and 0.32±0.07 were obtained from sire and sire-dam group, respectively, for litter size at birth. The heritability estimate for kidding interval was 0.03±0.01 for the sire-dam group. Repeatability estimates of 0.38±0.05 and 0.33±0.03 were obtained for litter size at birth from the dam and sire-dam groups, respectively, while 0.06±0.04 and 0.04±0.02 were obtained for kidding interval from dam and sire dam groups, respectively. Selection for multiple birth is likely to result in larger litter size and culling of does for long kidding interval should be based on more than two records

Weighted Feller-Pareto, Kumasrawamy-Generalized Pareto and Related Distributions

In this thesis, some fundamental results on the weighted and parent FellerPareto and related distributions are presented. Moments, measures of uncertainty including Shannon and s-entropies are presented. Some applications are given. We also introduce the Kumaraswamy distribution and the class of generalized Pareto distributions, and presents results on a more flexible and generalized class of distributions called the Kumaraswamy generalized Pareto class of distributions. Pareto type distributions are flexible parametric models with applications in reliability, actuarial science, economics, finance and telecommunications. We study some mathematical and statistical properties of the Kumaraswamy generalized Pareto distribution including the hazard function, reverse hazard function and moments with particular emphasis on the class of generalized Pareto sub-models

Genetic analysis of rabbit litter traits at birth and weaning

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Reproductive and body weight performance of the New Zealand white rabbits in the humid tropics of Nigeria

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Estimates of genetic parameters for economic traits in West African Dwarf goat

Records of 848 West African  Dwarf goat kids and 220 kiddings over a period of eight years (1982·1989) were analysed. The records were used to · provide heritability  nd repeatability estimates for litter' size at birth, kidding interval (repeatability estimate  alone) and body weight at birth, weaning, 3 months, 6 months, 9 months and 1 year of  age. Heritability  estimates of 0.28 ± 0.005, 0.18 ± 0.003, 0.14 ± 0.003, 0.29 ± 0.005, 0.11 ± 0.003 and 0.17 ± 0.004 were obtained for litter size at birth, body weight at birth, and at weaning, 3 months, 6 months, and 9 months of age respectively. Corresponding repeatability estimates were slightly higher than the heritability etimates. However, repeatability estimate of 0.04 ± 0.030 was obtained for kidding interval. Key words:Tropics, heritability, repeatability, WAD goats, body weight, little size, kidding intetval

Estimating Equations for Density Dependent Markov Jump Processes

Reaction networks are important tools for modeling a variety of biological phenomena across a wide range of scales, for example as models of gene regulation within a cell or infectious disease outbreaks in a population. Hence, calibrating these models to observed data is useful for predicting future system behavior. However, the statistical estimation of the parameters of reaction networks is often challenging due to intractable likelihoods. Here we explore estimating equations to estimate the reaction rate parameters of density dependent Markov jump processes (DDMJP). The variance–covariance weights we propose to use in the estimating equations are obtained from an approximating process, derived from the Fokker–Planck approximation of the chemical master equation for stochastic reaction networks. We investigate the performance of the proposed methodology in a simulation study of the Lotka–Volterra predator–prey model and by fitting a susceptible, infectious, removed (SIR) model to real data from the historical plague outbreak in Eyam, England

Agriculture intelligente face au climat : exploiter les synergies agriculture-élevage

Malgré la concurrence entre les entreprises agricoles et d'élevage, il est possible d'introduire des systèmes intégrant agriculture et élevage et générer ainsi des synergies au bénéfice de systèmes de production intelligents face au climat et plus résilients. Pour cela, il y a lieu de bien comprendre les arbitrages nécessaires et d'exploiter les possibilités offertes par une telle intégration

Harnessing synergies of crop-livestock integration for climate-smart agriculture

Integrated crop-livestock systems that provide synergies towards more resilient climate-smart agricultural production systems are possible despite the recognised competition between crops and livestock enterprises. To make this work, it is necessary to understand the trade-offs and capitalise on the opportunities provided through integration