| Einträge |
| Autor |
Akamine, T. |
| Titel |
A new standard formula for seasonal growth of fish in population dynamics |
Typ |
Zeitschrift, Artikel |
| Jahr |
1993 |
Publikation |
NIPPON SUISAN GAKKAISHI BULL. JAP. SOC. SCI. FISH. |
Kurztitel der Zeitschrift |
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| Band |
59 |
Ausgabe |
11 |
Seiten |
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| Schlüsselwörter |
Fisch, wachstum, statistik, modell, population, theorie |
Zusammenfassung  |
This formula is based on the Richards formula, which includes well-known growth formulae, and is invariant for allometry. It is expanded by exchanging the independent variable from time to its function, in other words the cumulative water temperature. This standard formula includes the method of substituting values for the cumulative water temperature into the time term, the mathematical model of adding sine functions to the time term, and switched growth rate models. This standard model is given by general theory, which makes the character of parameters clear and helps to analyze the growth formula statistically. |
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Geprüft |
nein |
| Rufnummer |
453 |
Signatur |
2257 |
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| Autor |
Caputi, N. |
| Titel |
Factors affecting the time series bias in stock-recruitment relationships and the interaction between time series and measurement error bias |
Typ |
Zeitschrift, Artikel |
| Jahr |
1988 |
Publikation |
CAN. J. FISH. AQUAT. SCI. |
Kurztitel der Zeitschrift |
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45 |
Ausgabe |
1 |
Seiten |
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| Schlüsselwörter |
Fischerei, statistik, zeitreihe, methode, modell, theorie |
| Zusammenfassung |
The stock-recruitment relationship (SRR) and the recruitment to spawning stock relationship (RSR) of the tiger prawn (Penaeus esculentus ) in Exmouth Gulf, Western Australia, were used to examine the time series bias and measurement error bias by Monte Carlo simulations. Simulating the effect of measurement error as well as the random variation about the SRR and RSR helps to determine the possible combinations of measurement error and random variation which may result in the observed variation about the SRR and RSR. The simulations also indicate that there is an interaction between measurement error and random variation about the SRR/RSR on the bias of the parameters of the SRR. |
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nein |
| Rufnummer |
434 |
Signatur |
2238 |
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| Autor |
Myers, R. A.; Cadigan, N. G. |
| Titel |
Statistical analysis of catch-at-age data with correlated errors |
Typ |
Zeitschrift, Artikel |
| Jahr |
1995 |
Publikation |
Can. J. Fish. Aquat. Sci. J. Can. Sci. Halieut. Aquat |
Kurztitel der Zeitschrift |
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52 |
Ausgabe |
6 |
Seiten |
1265-1273 |
| Schlüsselwörter |
Fisch, Fischerei, Statistik, Wachstum, Mortalität, VPA, Population, Mathematik, Modell |
| Zusammenfassung |
The statistical model used is extended to estimate abundance from commercial catch-at-age data for many of the major commercial fish species in the world. The model combines commercial catch-at-age data and research survey estimates of fish abundance; extends the model to allow correlated errors among ages within a year for the survey estimates of fish abundance. Method is formulated for modeling the fishing mortality on the oldest ages of the fish caught. Estimates are obtained using maximum likelihood. The level of correlation among ages is sufficiently large to produce large biases in the standard methods for some stocks. The statistical model that includes correlated errors greatly reduces bias and increases efficiency if the correlation in the estimation error is large. |
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Dep. Fish. Oceans, Sci. Branch, Box 5667, St. John's, NF A1C 5X1, Canada |
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528 |
Signatur |
2327 |
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| Autor |
Akamine, T. |
| Titel |
An interval estimation for the Petersen method using Bayesian statistics |
Typ |
Zeitschrift, Artikel |
| Jahr |
1989 |
Publikation |
Bull. Japan Sea Reg. Fish. Res. Lab. Nissuiken Hokoku |
Kurztitel der Zeitschrift |
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Ausgabe |
39 |
Seiten |
19-35 |
| Schlüsselwörter |
Bayesian, binominal, basic, listing, methode, theorie, algorithmus |
| Zusammenfassung |
The statistical model for the Petersen method is a hypergeometric distribution. Approximation to a binomial distribution has been used, and the usual method for this binomial model is based on approximation to a normal distribution. The Bayesian statistical model for a binomial distribution, which assumes that the prior distribution of parameters is uniform, corresponds well with the conventional method. However, the Bayesian statistical method for a hypergeometric distribution which assumes the uniform prior distribution is not feasible. The prior distribution according to the inverse squared parameter is natural for this model. Beta function and zeta function are important to understand these methods. This model is simpler to understand and easier to calculate by micro-computer than the conventional method. |
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| Rufnummer |
218 |
Signatur |
2106 |
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| Autor |
Akamine, T. |
| Titel |
An interval estimation for extraction using Bayesian statistics |
Typ |
Zeitschrift, Artikel |
| Jahr |
1989 |
Publikation |
Bull. Japan Sea Reg. Fish. Res. Lab. Nissuiken Hokoku |
Kurztitel der Zeitschrift |
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| Band |
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Ausgabe |
39 |
Seiten |
9-17 |
| Schlüsselwörter |
Bayesian, normalverteilung, binominal, statistik, theorie, algorithmus, listing, basic |
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The statistical model for extraction is a binomial distribution. The conventional method for employing this binomial model is based on approximation to a normal distribution. The Bayesian statistical method, which assumes that the prior distribution of parameters is uniform, is preferable to the conventional method, and two theorems demonstrate that this model corresponds well with the conventional method. Furthermore, this model is simpler to understand and easier to calculate by micro-computer than the conventional method. |
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| Rufnummer |
222 |
Signatur |
2110 |
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Lepetit, M.; Loranchet, S.; Gillet, P.; Marion, J. M. |
| Titel |
Un Logiciel De Traitement Des Histogrammes De Structure De Population Par La M+Thode Des Differences Logarithmiques De Bhattachary |
Typ |
Zeitschrift, Artikel |
| Jahr |
1991 |
Publikation |
Vie Milieu |
Kurztitel der Zeitschrift |
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| Band |
41 |
Ausgabe |
2/3 |
Seiten |
127-131 |
| Schlüsselwörter |
Population, statistik, programm, pascal, lÄngenfrequenz, methode |
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The software “BHATTA”, achieved in Turbo Pascal on IBM PC makes possible histogram analysis for population structure. The base of the study is an analysis of population dynamics from histograms of size frequency. The program “BHATTA”, made from the method of logarithmic differences of Bhattacharya, cuts the histograms in order to display Gaussian components and to estimate the parameters: number (size of sample), mean and standard deviation for each generation or cohort to determine growth curves for each cohort. |
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nein |
| Rufnummer |
400 |
Signatur |
2204 |
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Sekine, M.; Nakanishi, H.; Ukita, M.; Murakami, S. |
| Titel |
A shallow-sea ecological model using an object-oriented programming language |
Typ |
Zeitschrift, Artikel |
| Jahr |
1991 |
Publikation |
ECOL. MODEL. |
Kurztitel der Zeitschrift |
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| Band |
57 |
Ausgabe |
3-4 |
Seiten |
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Ökosystem, modell, oop, methode, theorie |
| Zusammenfassung |
The purpose of this study is to construct a model that can predict the impact on fisheries caused by coastal development activities. To accomplish this, many species of fish must be incorporated in the model, because each type of fish has a different value as a fishery resource and a different behavior for the same impact. In addition the effect of fish swimming must be considered because even when the total resource amount of fish does not change, fish may still disappear from the object area. These factors make the model structure complicated. Meanwhile, a new concept called “object oriented programming” (OOP) is attracting the attention of modellers. In this paper, we have constructed a model called the “shallow-sea ecological model” (SSEM), by using Smalltalk, which is representative of the OOP language. This showed that the fishing ground environment are expressed very flexibly and plainly by Smalltalk. |
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nein |
| Rufnummer |
405 |
Signatur |
2209 |
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Gerdeaux, D. |
| Titel |
(Review of methods of estimating population size based on removal data computer program of size estimation with the Carle and Strub method) |
Typ |
Zeitschrift, Artikel |
| Jahr |
1987 |
Publikation |
Bull. Fr. Peche Piscic |
Kurztitel der Zeitschrift |
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Ausgabe |
304 |
Seiten |
13-21 |
| Schlüsselwörter |
Population, statistik, methode, listing, basic, vergleich, modell, fisch |
| Zusammenfassung |
The paper describes methods of estimating population size based on survey removal data. The Zippin maximum likelihood model is presented with the possibility with microcomputer. The Carle and Strub method is considered most convenient and a microcomputer program is published. |
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nein |
| Rufnummer |
195 |
Signatur |
2084 |
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Krivan, V.; Seda, J. |
| Titel |
Application of a guaranteed regression model to trophic interaction in an aquatic system |
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Zeitschrift, Artikel |
| Jahr |
1989 |
Publikation |
ECOL. MODEL. |
Kurztitel der Zeitschrift |
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49 |
Ausgabe |
1-2 |
Seiten |
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Ökosystem, modell, interaktion, trend, fisch, statistik |
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The method of guaranteed estimation is used to estimate the unknown parameters of two nonlinear regression models. The first describes the relations between the body size structure of zooplankton and the biomass of planktivorous fish. The second estimates time-lag between the dynamics of cladoceran egg production and dynamics of phytoplankton. |
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nein |
| Rufnummer |
422 |
Signatur |
2226 |
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| Autor |
Eckmann, Reiner; Gaedke, Ursula; Wetzlar, Hans Johst |
| Titel |
Effects of Climatic and Density-Dependent Factors on Year-Class Strength of Coregonus lavaretus in Lake Constance |
Typ |
Zeitschrift, Artikel |
| Jahr |
1988 |
Publikation |
Can. J. Fish. Aquat. Sci. |
Kurztitel der Zeitschrift |
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| Band |
45 |
Ausgabe |
6 |
Seiten |
1088-1093 |
| Schlüsselwörter |
Fischerei, zeitreihe, modell, statistik |
| Zusammenfassung |
The influences of density-dependent and density-independent factors on year-class strength (YCS) of Corogonus lavaretus in Lake Constance were studied by multiple linear regression analyses for the period from 1962 to 1982. Meteorological conditions that lead to early thermal stratification of the lake in April are of prime importance for YCS and account for 41% of the total YCS variance. Zooplankton concentration during spring has no significant influence on YCS. The extensive stocking program on the lake (50-200 million larvae stocked per year) significantly supports YCS, but this relationship becomes apparent only after the influence of meteorological conditions are removed from the data. |
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nein |
| Rufnummer |
419 |
Signatur |
2223 |
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