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1,874 results on '"Pope, John"'

105. Memoirs of Fellows and Corresponding Fellows of the Medieval Academy of America

Author

Courtenay, William J., Cranz, F. Edward, Rosenthal, Franz, Benson, Robert L., Marti, Berthe, Bisson, T. N., Benson, Larry D., Kane, George, Robinson, Fred C., Boyle, Leonard, Tierney, Brian, Kuttner, Stephan, Hanning, Robert, Pope, John, Thorne, Samuel, Baldwin, John W., Andersson, Theodore M., Lewis, Archibald R., Pelikan, Jaroslav, Herlihy, David, Leyerle, John, Fisher, John H., Dean, Ruth J., Roach, William J., Wenzel, Siegfried, Lewis, Archibald L., Lyon, Bryce, Cuttino, G. P., Benton, John F., Clagett, Marshall, Rouse, Richard H., and Grant, Edward

Published
1988

117. Addressing catch mechanisms in gillnets improves modeling of selectivity and estimates of mortality rates: a case study using survey data on an endangered stock of Arctic char

Author

Jonsson, Tomas, Setzer, Malin, Pope, John G., and Sandstrom, Alfred

Subjects
Fish stocking -- Methods, Gillnetting, Mortality -- Canada, Fish populations, Earth sciences
Abstract

Estimation of fish stock size distributions from survey data requires knowledge about gear selectivity. However, selectivity models rest on assumptions that seldom are analyzed. Departures from these can lead to misinterpretations and biased management recommendations. Here, we use survey data on great Arctic char (Salvelinus umbla) to analyze how correcting for entanglement of fish and nonisometric growth might improve estimates of selectivity curves, and subsequently estimates of size distribution and age-specific mortality. Initial selectivity curves, using the entire data set, were wide and asymmetric, with poor model fits. Removing potentially nonmeshed fish had the greatest positive effect on model fit, resulting in much narrower and less asymmetric selection curves, while attempting to take nonisometric growth into account, by using girth rather than length, improved model fit but not as much. Using simulations we show that correcting for both entanglement and size selectivity produces accurate estimates of mortality rates, while correcting for size selectivity only does not. Our study demonstrates an approach that increases the accuracy of estimates of fish size distributions and mortality rates from survey data. L'estimation de la distribution des tailles au sein de stocks de poissons a partir de donnees tirees devaluations necessite une connaissance de la selectivite des engins. Les modeles de selectivite reposent toutefois sur des hypotheses qui sont rarement analysees. Des ecarts par rapport a ces dernieres peuvent se traduire par des interpretations erronees et des recommandations de gestion biaisees. Nous avons utilise des donnees devaluations relatives a l'omble chevalier (Salvelinus umbla) pour analyser comment des correctifs visant a tenir compte de l'enchevetrement de poissons et de la croissance non isometrique pourraient ameliorer les estimations de courbes de selectivite et, ainsi, les estimations de la distribution des tailles et de la mortalite selon l'age. Les courbes de selectivite initiales obtenues en utilisant l'integralite des donnees etaient larges et asymetriques, et l'ajustement du modele n'etait pas bon. Le retrait des poissons potentiellement non enchevetres a eu le plus grand effet positif sur l'ajustement du modele aux donnees, produisant des courbes de selection beaucoup moins larges et asymetriques, alors que la prise en compte de la croissance non isometrique en utilisant le tour du corps plutot que la longueur a ameliore l'ajustement du modele, mais dans une moindre mesure. Nous demontrons, a l'aide de simulations, que le fait de corriger pour l'enchevetrement et la selectivite des tailles produit des estimations exactes du taux de mortalite, contrairement au fait de corriger seulement pour la selectivite des tailles. L'etude demontre qu'une telle approche accroit l'exactitude des estimations de la distribution des tailles et du taux de mortalite des poissons basees sur des donnees devaluations. [Traduit par la Redaction], Introduction In freshwater systems several standardized methods exist to estimate community species composition, as well as abundance, biomass, and size distribution of fish stocks, including electrofishing, hydroacoustics, and gillnet surveys. [...]

Published
2013
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143. On the Eucharist

Author

Pope John Paul II and Pope John Paul II

Abstract

The Eucharist is the source and summit of our Faith because the Blessed Sacrament is Christ himself, the full manifestation of his boundless love. In this encyclical letter On the Eucharist, Pope John Paul II seeks to rekindle in the faithful the profound sense of amazement and gratitude that surrounds the Eucharist.'In the humble signs of bread and wine, changed into his Body and Blood, Christ walks beside us as our strength and our food for the journey, and he enables us to become, for everyone, witnesses of hope,'John Paul II writes.'The Church has received the Eucharist from Christ her Lord not as one gift — however precious — among so many others, but as the gift par excellence, for it is the gift of himself, of his Person in his sacred humanity, as well as the gift of his saving work.'

Published
2023

150. Urolithiasis

Author

Ching, Christina B., primary, Crane, Gabriella L., additional, and Pope, John C., additional

Published
2013
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