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Life Sciences

University of Montana

Wildlife Biology Faculty Publications

2004

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Estimating Survival Probabilities Of Unmarked Dependent Young When Detection Is Imperfect, Paul M. Lukacs, Victoria J. Dreitz, Kenneth P. Burnham, Fritz L. Knopf Nov 2004

Estimating Survival Probabilities Of Unmarked Dependent Young When Detection Is Imperfect, Paul M. Lukacs, Victoria J. Dreitz, Kenneth P. Burnham, Fritz L. Knopf

Wildlife Biology Faculty Publications

We present a capture-recapture modeling approach to the estimation of survival probability of dependent chicks when only the attending adult bird is marked. The model requires that the bird's nest is found prior to hatching and that the number of eggs that hatch are counted. Subsequent data are sightings of the marked adult and a count of chicks with the adult. The model allows for imperfect detection of chicks, but the number of chicks can never exceed the number of eggs in the nest (i.e., adults cannot adopt chicks). We use data from radio-tagged adult Mountain Plovers (Charadrius montanus …


Effects Of Natal Departure And Water Level On Survival Of Juvenile Snail Kites (Rostrhamus Sociabilis) In Florida, Victoria J. Dreitz, Wiley M. Kitchens, Donald L. Deangelis Jul 2004

Effects Of Natal Departure And Water Level On Survival Of Juvenile Snail Kites (Rostrhamus Sociabilis) In Florida, Victoria J. Dreitz, Wiley M. Kitchens, Donald L. Deangelis

Wildlife Biology Faculty Publications

Survival rate from fledging to breeding, or juvenile survival, is an important source of variation in lifetime reproductive success in birds. Therefore, determining the relation-ship between juvenile survival and environmental factors is essential to understanding fitness consequences of reproduction in many populations. With increases in density of individuals and depletion of food resources, quality of most habitats deteriorates during the breeding season. Individuals respond by dispersing in search of food resources. Therefore, to understand the influence of environmental factors on juvenile survival, it is also necessary to know how natal dispersal influences survival of juveniles. We examined effects of various …


Avian Life-History Evolution Has An Eminent Past: Does It Have A Bright Future?, Thomas E. Martin Apr 2004

Avian Life-History Evolution Has An Eminent Past: Does It Have A Bright Future?, Thomas E. Martin

Wildlife Biology Faculty Publications

No abstract provided.