oalib
Search Results: 1 - 10 of 51 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /51
Display every page Item
An Assessment of Weight-Length Relationships for Muskellunge,Northern Pike, and Chain Pickerel In Carlander's Handbook of Freshwater Fishery Biology  [PDF]
Joshua Daviscourt,Joshua Huertas,Michael Courtney
Quantitative Biology , 2011,
Abstract: Carlander's Handbook of Freshwater Fishery Biology (1969) contains life history data from many species of freshwater fish found in North America. It has been cited over 1200 times and used to produce standard-weight curves for some species. Recent work (Cole-Fletcher et al. 2011) suggests Carlander (1969) contains numerous errors in listed weight-length equations. This paper assesses the weight-length relationships listed in Carlander for muskellunge, northern pike, and chain pickerel by comparing graphs of the weight vs. length equations with other data listed and with standard weight curves published by independent sources. A number of discrepancies are identified through this analysis and new weight-length relationships are produced from listed data.
Genetic Diversity and Ancestral History of the German Angler and the Red-and-White Dual-Purpose Cattle Breeds Assessed through Pedigree Analysis  [PDF]
Sowah Addo, Jonas Sch?ler, Dirk Hinrichs, Georg Thaller
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.89075
Abstract: Local cattle breeds continue to decline in numbers partly due to the use of high performing breeds in advanced production systems where genetic material of elite animals is widely spread. The objective of this study was to assess the within and across breed genetic diversity of the Angler and Red-and-White dual-purpose (DP) cattle breeds applying different inbreeding concepts. Classical and ancestral inbreeding coefficients were computed from pedigree data using the gene dropping method. Effective population size was calculated based on the increase of classical inbreeding, and based on ancestral inbreeding to obtain what was termed as ancestral effective population size. Furthermore, the effective number of founders and ancestors were computed to assess the disequilibrium of founder contribution in the reference populations. The analyses were performed separately for each breed and for a combined dataset. The Angler pedigree was more complete (88%) in the first parental generation but completeness declined with increasing pedigree depth. Average classical inbreeding coefficients of inbred individuals were 2.19%, 1.94% and 2.07%, while average Ballou’s ancestral inbreeding coefficients were 3.69%, 1.39% and 2.21% for the Angler, Red-and-White DP and the combined breed pedigree analyses, respectively. Ancestral history coefficient is a novel coefficient and its estimates were similar and strongly correlated to Ballou’s coefficients (r = 0.99, p < 0.001). The effective population size estimates ranged from 156 to 170 for the classical inbreeding based method, and as low as from 50 to 54 for the ancestral history coefficient based method. The effective number of founders and ancestors ranged from 310 to 532, and 90 to 189, respectively. Our results show that the Red Holstein breed is a key progenitor of the breed populations under study. This highlights cross breeding schemes introduced to improve the milk trait performance of the Angler and Red-and-White DP breeds some decades ago.
“The Noble Savage and the Civilised Brute: Nature and the Subaltern Angst in Swarup Dutta’s Machh Master (The Expert Angler)
Sajalkumar Bhattacharya
Rupkatha Journal on Interdisciplinary Studies in Humanities , 2009,
Abstract: Parallel reading of history from the subaltern point of view is not only possible, but it also often proves to be revealing. It often unearths a new discourse, which challenges the canonized history or even subverts it. This paper offers a reading of a recent Bhasa (Bangla) novel Machh Master (The Expert Angler) where the Naxalite Movement that rocked Bengal in the sixties, has been narrated and analysed from the viewpoint of one dalit subaltern. The novel attempts to create a binary between this ‘uncorrupted’ world/mode of existence and the civilized, sophisticated, intellectual, but essentially ‘corrupted’ urban world. In this natural savage world and its eco-system, the urban, elitist Naxalite movement turns out to be nothing but an imposition and an intrusion. At the end, disillusioned Neul detaches himself from this movement, goes back to, and embraces Nature in a desperate bid to get back his pre-lapserian mode of existence. Neel, chief agent of the Naxalite movement, too is influenced by these children of Mother Nature, and undergoes a transformation. This paper explores this interesting role of Nature in this new reading of the history of mankind.
Maternal Fish Consumption and Infant Birth Size and Gestation: New York State Angler Cohort Study
Germaine M Buck, Grace P Tee, Edward F Fitzgerald, John E Vena, John M Weiner, Mya Swanson, Michael E Msall
Environmental Health , 2003, DOI: 10.1186/1476-069x-2-7
Abstract: 2,716 infants born between 1986–1991 to participants of the New York State Angler Cohort Study were studied with respect to duration of maternal consumption of contaminated fish from Lake Ontario and its tributaries and gestation and birth size. Hospital delivery records (maternal and newborn) were obtained for 92% of infants for the ascertainment of gestation (weeks), birth size (weight, length, chest, and head circumference) and other known determinants of fetal growth (i.e., maternal parity, history of placental infarction, uterine bleeding, pregnancy loss or cigarette smoking and infant's race, sex and presence of birth defect). Duration of maternal fish consumption prior to the index infant's birth was categorized as: none; 1–2, 3–7, 8+ years, while birth weight (in grams), birth length (in centimeters), and head and chest circumference (in centimeters) were left as continuous variables in multiple linear regression models. Birth size percentiles, ponderal indices and head to chest circumference ratios were computed to further assess proportionality and birth size in relation to gestational age.Analysis of variance failed to identify significant mean differences in gestation or any measure of birth size in relation to duration of maternal lifetime fish consumption. Multiple linear regressions identified gestational age, male sex, number of daily cigarettes, parity and placental infarction, as significant determinants of birth size.The results support the absence of an adverse relation between Lake Ontario fish consumption and reduced birth size as measured by weight, length and head circumference. Biological determinants and maternal cigarette smoking during pregnancy remain important determinants of birth size.Consumption of fish from fresh and marine bodies of waters poses an interesting paradox. On one hand, there is increasing and rather convincing observational and experimental data underscoring the beneficial effects of marine fish consumption on fetal gr
Linguistic Lunacy as Transgressive Practice
Anna Katharina Schaffner
Nordlit : Tidsskrift i litteratur og kultur , 2007,
Abstract:
Linguistic Lunacy as Transgressive Practice  [cached]
Anna Katharina Schaffner
Nordlit : Tidsskrift i litteratur og kultur , 2007,
Abstract:
Psychiatric Health Laws in Pakistan: From Lunacy to Mental Health  [PDF]
Ahmed Ijaz Gilani ,Umer Ijaz Gilani,Pashtoon Murtaza Kasi,Murad Musa Khan
PLOS Medicine , 2005, DOI: 10.1371/journal.pmed.0020317
Abstract:
Psychiatric health laws in Pakistan: from lunacy to mental health.
Gilani Ahmed Ijaz,Gilani Umer Ijaz,Kasi Pashtoon Murtaza,Khan Murad Musa
PLOS Medicine , 2005,
Abstract:
Behavioural and fitness consequences of direct and indirect non-lethal disturbances in a catch-and-release northern pike (Esox lucius) fishery Les conséquences des perturbations non-létales directes et indirectes sur le comportement et la fitness de brochets (Esox lucius) dans une pêcherie avec capture et relacher
Klefoth T.,Kobler A.,Arlinghaus R.
Knowledge and Management of Aquatic Ecosystems , 2011, DOI: 10.1051/kmae/2011072
Abstract: In a catch-and-release recreational fishery fish populations can be impacted by lethal and sub-lethal effects. In terms of sub-lethal effects anglers may directly (catch-and-release) and/or indirectly (angling-related disturbances, e.g. boating) influence the behaviour, growth and fitness of the fish. We quantified the long-term behavioural response of northern pike Esox lucius to angler-induced direct and indirect disturbances using radio-telemetry techniques. A whole lake experimental approach was conducted by dividing the study lake into an angling-disturbed and an angling-undisturbed lake side with 10 radio-tagged fish on each side, representing ~20% of the adult pike population. The impact of angling-caused disturbances on pike behaviour and growth as a proxy for fitness was assessed in a 7 month study period. Direct disturbances reduced swimming activities of pike and resulted in increased selection for structured (i.e., safer) habitat, whereas indirect disturbances had no significant effect on pike behaviour. Growth rates of caught-and-released fish were significantly smaller than those of uncaught pike (44%). Because, fish that were not captured by angling during the study period showed similar growth rates on both sides of the lake, this indicated that only direct angler-induced disturbances influenced pike growth. Our findings call for minimization of angling-related stressors during the process of catch-and-release angling to avoid behavioural and fitness impairments of the released fish because these may ultimately have population-level effects. Dans les pêcheries en capture-relacher, les populations de poissons peuvent être impactées par des effets létaux et sub-létaux. En termes d’effets sub-létaux, les pêcheurs peuvent directement (capture-relacher) et/ou indirectement (perturbations à lier à la pêche, la navigation, par exemple) influencer le comportement, la croissance et la forme du poisson. Nous avons quantifié la réponse à long terme du comportement du brochet Esox Lucius aux perturbations directes et indirectes induites par les pêcheurs en utilisant des techniques de radio-télémétrie. Une approche expérimentale globale du lac a été réalisée en divisant le lac étudié en un c té du lac perturbé par la pêche et un autre c té non perturbé avec 10 poissons radio-marqués de chaque c té, ce qui représente environ 20 % de la population des brochets adultes. L’impact des perturbations causées par la pêche sur le comportement des brochets et de leur croissance comme un proxy de la fitness a été évalué sur une période d’étude de 7 mois. Les per
Time management in a Poisson fishing model  [PDF]
Anna Karpowicz,Krzysztof Szajowski
Mathematics , 2008,
Abstract: The aim of the paper is to extend the model of "fishing problem". The simple formulation is following. The angler goes to fishing. He buys fishing ticket for a fixed time. There are two places for fishing at the lake. The fishes are caught according to renewal processes which are different at both places. The fishes' weights and the inter-arrival times are given by the sequences of i.i.d. random variables with known distribution functions. These distributions are different for the first and second fishing place. The angler's satisfaction measure is given by difference between the utility function dependent on size of the caught fishes and the cost function connected with time. On each place the angler has another utility functions and another cost functions. In this way, the angler's relative opinion about these two places is modeled. For example, on the one place better sort of fish can be caught with bigger probability or one of the places is more comfortable. Obviously our angler wants to have as much satisfaction as possible and additionally he have to leave the lake before the fixed moment. Therefore his goal is to find two optimal stopping times in order to maximize his satisfaction. The first time corresponds to the moment, when he eventually should change the place and the second time, when he should stop fishing. These stopping times have to be less than the fixed time of fishing. The value of the problem and the optimal stopping times are derived.
Page 1 /51
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.