Grossman, G. D., Hill, J., & Petty, J. T. (1995). Observations on Habitat Structure, population Regulation, and Habitat Use with Respect to Evolutionarily Significant Units: A Landscape Perspective for Lotic Systems (Vol. 17).
Schlüsselwörter: Fisch, Habitat, Population
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Bartl, G., & Troschel, H. J. (1995). Maifische im Rheinsystem – Historische und aktuelle Situation von Alosa alosa und A. fallax im Rheingebiet.
Schlüsselwörter: Fisch, Maifisch, Finte, Alosa fallax, Alosa alosa, Historisch, Vorkommen
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Maier, K. - J., Zeh, M., Ortlepp, J., & Zbinden, S. (1995). Verbreitung und Fortpflanzung der in der Schweiz vorkommenden Chondrostoma-Arten: Nase (C. nasus), Sofie (C. toxostoma), Savetta (C. soetta). Mitteilungen zur Fischerei, 53. Bern/CH: Bundesamt für Umwelt, Wald und Landschaft (BUWAL).
Schlüsselwörter: Fisch, Nase, Chondrostoma nasus, Vorkommen, Fortpflanzung
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Kammerad, B. (1995). Fischarten im sachsen-anhaltinischen Teil der Saale und Schlußfolgerung für den Naturschutz. Natursch. i. Land Sachsen-Anhalt, 32, 498?536.
Schlüsselwörter: Fisch, Vorkommen, Naturschutz
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Otto, G. (1995). Zur ursprünglichen und gegenwärtigen Fauna der Fische und Rundmäuler im anhaltinischen Abflußgebiet der Mulde. Bitterfelder Heimatblätter, 18, 19?28.
Schlüsselwörter: Fisch, Vorkommen, Neunauge, regional
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Hoenig, J. M., Morgan, M. J., & Brown, C. A. (1995). Analysing differences between two age determination methods by tests of symmetry (Vol. 52).
Zusammenfassung: A common problem in fisheries science is the comparison of two methods for obtaining ages of individual animals. The authors suggest that if the overall level of agreement is low between two ageing methods used on the same sample of fish, then one can use a test of symmetry to look for evidence of systematic disagreement. A chi super(2) test is used to determine if the number of fish assigned age i from method 1 and age j from method 2 differs significantly from the number of fish assigned age j from method 1 and age i from method 2. Such a test can also be used to determine the range of nominal ages over which two methods appear to give comparable results.
Schlüsselwörter: Altersbestimmung, Fischerei, Statistik, Methode
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Mertz, G., & Myers, R. A. (1995). Estimating the predictability of recruitment (Vol. 93).
Zusammenfassung: A simple analytical technique is developed for estimating the predictability of recruitment, that is, correlations between recruitment and stage-specific mortalities or abundances. The method requires the input of estimates of the variability of stage-specific mortalities, which may be calculated from mean stage-specific mortalities by applying a published regression. It is shown that modification of this regression to compensate for sampling error in field measurements of abundance significantly reduces the estimated standard deviation of log-recruitment, which is an important factor in the predictability calculations. It is concluded that the prospects for predicting recruitment from egg or larval surveys or from environmental variables are quite poor for fish stocks showing the typical distribution of mortality across stages.
Schlüsselwörter: recruitment-; mortality-; developmental-stages; fishery-biology; fishery-management; environmental-factors; stock-assessment; Pisces-; population-dynamics; models-
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Leshkevich, G. A. (1995). Great Lakes CoastWatch program update.
Zusammenfassung: As the CoastWatch regional node for the Great Lakes, the Great Lakes Environmental Research Laboratory (GLERL) is working to obtain and/or develop and deliver environmental data and products for near real-time monitoring of the Great Lakes to support environmental science and decision making. In support of this goal, GLERL is providing access to near real-time and retrospective satellite observations and in-situ data for the Great Lakes to Federal, state, and local agencies and academic institutions. There are currently nearly 40 regional CoastWatch users. The goals and objectives of the Great Lakes CoastWatch Program directly support agency statutory responsibilities in estuarine and marine science, living marine resource protection, and ecosystem monitoring and management. GLERL is currently receiving an enhanced digital image product suite of 26 images including satellite derived surface-temperature, visible and near-infrared reflectance, brightness temperatures, satellite and solar zenith angle data, and cloud masks from the NOAA-12 satellite. These products are downloaded from the NOAA Ocean Products Center (OPC) via INTERNET on a daily basis and archived at GLERL. Over 32,000 image products have been received and archived since becoming the Great Lakes CoastWatch Node in 1990. GOES-8 data is also currently being received.
Schlüsselwörter: North-America,-Great-Lakes; monitoring-; decision-making; satellite-technology; coastal-waters; ecosystems-; data-transmission; environmental-monitoring; satellite-sensing
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Hiramatsu, K., Akamine, T., & Kitada, S. (1995). Effectiveness of partial likelyhood of estimating fish mortality rates from tag recoveries and the stock composition in the mixed population based on genetic data.
Zusammenfassung: Because of the simplicity of calculation and the availability of evaluating the precision of the estimates, a partial likelihood approach has been used for estimating fish mortality rates from tag recoveries and the stock composition in the mixed population based on genetic data. We compare the partial likelihood estimator with the full likelihood estimator, and find that under some conditions, both estimators are the same. The above applications meet the conditions and hence the estimates using the partial likelihood are the same as the ones using the full likelihood. In this case, the partial likelihood approach is quite useful.
Schlüsselwörter: stock-assessment; tagging-; genomes-; fishing-mortality; mixing-ratio; mathematical-analysis
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Petrick, G. (1995). Zur Fischfauna des Gülper Sees und der Unteren Havelniederung (Vol. 4).
Zusammenfassung: Die Fischfauna der als Feuchtgebiet internationaler Bedeutung ausgewiesenen Flussaue ist durch Verschlammung und Eutrophierung gefaehrdet. Insbesondere die im Kies laichenden Arten Rapfen und Zope verlieren Lebensraum. Blei und Guester sind die einzigen Arten mit positiver Bestandstendenz. Charakteristische Arten wie Schleie, Karausche und Hecht nehmen ab. Das Flussneunauge ist ausgestorben. Hilfsmassnahmen sind erforderlich, nach weiteren vorbereitenden Untersuchungen muessen sie zusammen mit Fischern umgesetzt werden.
Schlüsselwörter: Fisch, Vorkommen, Arteninventar, Kartierung
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