Large Attendance and fine Program Mark Success of Milwaukee Meeting and Exposition

1962 ◽  
Vol 2 (12) ◽  
pp. 24A-24A
Keyword(s):  
Program Mark

scholarly journals Nest Survival Estimation: A Review of Alternatives to the Mayfield Estimator

The Condor ◽  
2004 ◽  
Vol 106 (3) ◽  
pp. 472-484 ◽  
Author(s):  
Gretchen Jehle ◽  
Amy A. Yackel Adams ◽  
Julie A. Savidge ◽  
Susan K. Skagen
Keyword(s):  
Nest Success ◽  
Nest Survival ◽  
Survival Rates ◽  
Theoretic Approach ◽  
Program Mark ◽  
Information Theoretic ◽  
Biologically Relevant ◽  
Daily Survival ◽  
Mayfield Method ◽  
Information Theoretic Approach

AbstractReliable estimates of nest survival are essential for assessing strategies for avian conservation. We review the history of modifications and alternatives for estimating nest survival, with a focus on four techniques: apparent nest success, the Mayfield estimator, the Stanley method, and program MARK. The widely used Mayfield method avoids the known positive bias inherent in apparent nest success by estimating daily survival rates using the number of exposure days, eliminating the need to monitor nests from initiation. Concerns that some of Mayfield's assumptions were restrictive stimulated the development of new techniques. Stanley's method allows for calculation of stage-specific daily survival rates when transition and failure dates are unknown, and eliminates Mayfield's assumption that failure occurred midway through the nest-check interval. Program MARK obviates Mayfield's assumption of constant daily survival within nesting stages and evaluates variation in nest survival as a function of biologically relevant factors. These innovative methods facilitate the evaluation of nest survival using an information-theoretic approach. We illustrate use of these methods with Lark Bunting (Calamospiza melanocorys) nest data from the Pawnee National Grassland, Colorado. Nest survival estimates calculated using Mayfield, Stanley, and MARK methods were similar, but apparent nest success estimates ranged 1– 24% greater than the other estimates. MARK analysis revealed that survival of Lark Bunting nests differed between site–year groups, declined with both nest age and time in season, but did not vary with weather parameters. We encourage researchers to use these approaches to gain reliable and meaningful nest survival estimates.Estimación de la Supervivencia de Nidos: Una Revisión de las Alternativas del Estimador MayfieldResumen. Es esencial contar con estimaciones confiables de la supervivencia de nidos para evaluar las estrategias de conservación de las aves. Revisamos la historia de modificaciones y las alternativas para estimar la supervivencia de nidos, enfocándonos en cuatro técnicas: éxito aparente del nido, el estimador de Mayfield, el método de Stanley y el programa MARK. El método de Mayfield, ampliamente usado, evita el conocido sesgo positivo inherente al éxito aparente del nido mediante la estimación de tasas de supervivencia diaria usando el número de días de exposición, eliminando así la necesidad de monitorear los nidos desde el inicio. Las preocupaciones de que algunos de los supuestos del método de Mayfield son restrictivos estimularon el desarrollo de nuevas técnicas. El método de Stanley permite el cálculo de tasas de supervivencia diarias específicas para cada etapa cuando las fechas de transición y fracaso son desconocidas, y elimina el supuesto del método de Mayfield que sostiene que el fracaso ocurre en el medio del intervalo de monitoreo del nido. El programa MARK elimina el supuesto del método de Mayfield sobre supervivencia diaria constante dentro de las etapas de nidificación y evalúa la variación en la supervivencia de nidos como función de factores biológicamente relevantes. Estos métodos innovadores facilitan la evaluación de la supervivencia de nidos usando un enfoque teórico-informativo. Ilustramos el uso de estos métodos con datos de nidos de Calamospiza melanocorys provenientes de Pawnee National Grassland, Colorado. Las estimaciones de supervivencia de los nidos calculadas usando los métodos de Mayfield, Stanley y MARK fueron similares, pero las estimaciones del éxito aparente de los nidos fueron entre 1–24% mayores que las otras estimaciones. Los análisis con MARK revelaron que la supervivencia de los nidos de C. melanocorys difirió entre grupos de sitio-año, disminuyó con la edad del nido y el tiempo de la estación, pero no varió con parámetros climáticos. Estimulamos a los investigadores a usar estos enfoques para obtener estimaciones de supervivencia de nidos confiables y válidas.

The PAL program Mark II

1993 ◽  
Vol 13 (2) ◽  
pp. 120-125 ◽  
Author(s):  
W.A.K. Lees ◽  
P.J. Selby
Keyword(s):  
Program Mark

Program MARK: survival estimation from populations of marked animals

Bird Study ◽  
1999 ◽  
Vol 46 (sup1) ◽  
pp. S120-S139 ◽  
Author(s):  
Gary C. White ◽  
Kenneth P. Burnham
Keyword(s):  
Program Mark ◽  
Survival Estimation

Multistate Survival Models and Their Extensions in Program MARK

2006 ◽  
Vol 70 (6) ◽  
pp. 1521-1529 ◽  
Author(s):  
GARY C. WHITE ◽  
WILLIAM L. KENDALL ◽  
RICHARD J. BARKER
Keyword(s):  
Survival Models ◽  
Program Mark

scholarly journals Maintaining the Historical Record

1989 ◽  
Vol 110 ◽  
pp. 171-172
Author(s):  
Brenda G. Corbin
Keyword(s):  
Historical Perspective ◽  
State Of The Art ◽  
Historical Record ◽  
Art Conservation ◽  
Royal Greenwich Observatory ◽  
Program Mark ◽  
Basic Principles ◽  
Historical Materials ◽  
Set Up ◽  
Historical Instruments

The session on Conservation of Historical Materials covered preservation of library materials and historical instruments, and included an account of how one observatory set up a state of the art conservation laboratory and program. Mark Roosa of the Library of Congress told us in a very lively way what we should be doing to preserve current and rare library materials. Perhaps many of us knew some of these basic principles, but it was good to be reminded of them so that we can more actively apply them in our libraries. Janet Dudley (formerly of the Royal Greenwich Observatory) described the magnificent conservation project which was set up at RGO a few years ago. It would be ideal if such projects could be undertaken at all astronomy libraries which have rare books and archival materials. However, it is apparent that finding funds for conservation is very difficult in many institutions. Magda Vargha of the Konkoly Observatory described the conservation of historical instruments, and reminded us of the terrible things which can happen to these instruments if they are not considered within the historical perspective of the institution.

Sign in / Sign up

Export Citation Format

Share Document