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70 results found
1. Life histories of the highly diverse and endangered North American freshwater mussel fauna are poorly known. We investigated reproductive traits of eight riverine mussel species in Alabama and Mississippi, U.S.A.: Amblema plicata, Elliptio arca, Fusconaia cerina, Lampsilis ornata, Obliquaria…
Author(s): Wendell R. Haag, J. Leann Staton
Keywords: fecundity, life history, mussels, reproduction, Unionidae
Source: Freshwater Biology (2003) 48, 2118-2130
Year: 2003
Many exotic tree species have been imported into Puerto Rico for their wood, fruit, and use as coffee shade and ornamentals. Some of these trees have naturalized (reproduced without human intervention) and some have escaped into natural forests. At least 118 exotic species are reproducing in Puerto…
Author(s): John K. Francis, Henri A. Liogier
Keywords: escaped species, introduced species, reproduction, tree flora
Source: Gen. Tech. Rep. SO-82. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 12 p.
Year: 1991
Studies were made to determine how long Douglas-fir pollen remains viable after suspension in cool water form 0 to 34 days. Linear regression analysis of in vivo and in vitro tests indicated that filled seed efficiency and pollen viability, respectively, decreased about 3 percent per day. The…
Author(s): Donald L. Copes, Nan C. Vance
Keywords: Supplemental mass pollination, seed orchard, flowering, reproduction, filled seed efficiency, Douglas-fir, Pseudotsuga menziesii
Source: Res. Note PNW-RN-527. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 9 p
Year: 2000
We used mark-recapture methods to monitor Northern Goshawks (Accipiter gentilis) and their nests over 12 yr in an increasing sample of breeding territories (37 in 1991 to 121 in 2002) in northern Arizona. As many as 8 yr of repeated nest searching were required to identify the population of…
Author(s): Richard T. Reynolds, J. David Wiens, Suzanne M. Joy, Susan R. Salafsky
Keywords: Northern Goshawk, Accipiter gentilis, alternate nest, Arizona, bootstrap, detectability, monitoring, reproduction, sampling, territory occupancy
Source: Journal of Raptor Research. 39(3): 274-285.
Year: 2005
Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae) is a recently introduced non-native invasive species in North America that has the potential to destroy several tree species in urban and forest habitats. Adult survival, reproduction, and egg hatch of A. glabripennis from two…
Author(s): Melody A. Keena
Keywords: temperature, survival, reproduction, fecundity
Source: Environmental Entomology. 35(4): 912-921.
Year: 2006
Survival rates, causes of mortality, and reproduction in the American marten (Martes americana) were determined in northeastern Oregon from 1994 until 1997 with radiocollared martens. The probability of survival of martens ≥9 mo old was 0.55 for 1 yr, 0.37 for 2 yr, 0.22 for 3 yr, and 0.15…
Author(s): Evelyn L. Bull, Thad W. Heater
Keywords: American marten, Martes americana, survival, mortality, northeastern Oregon, reproduction
Source: Northwestern Naturalist. 82(1): 1-6
Year: 2001
We quantified: (1) growth rate, (2) length-mass relationships, (3) size- and age-specific fecundity, (4) egg size-frequencies, and (5) size- and age-specific egg diameter relationships for reproductively active female C. bairdi from one of the southern-most extant populations of this species (…
Author(s): Gary D. Grossman, Kathleen McDaniel, Robert E. Ratajczak
Keywords: Ova, egg, reproduction, fecundity, fecundity-length relationships, fecundity-age relationships, ova body-size relationships, egg diameters
Source: Environmental Biology of Fishes 63: 299-308
Year: 2002
Breeding chronology and reproductive success of the Merlin (Falco columbarius richarsonii) were studied in southeastern Montana from 1978 - 1981. Breeding activity spanned 5 mo from the earliest observation of adults to the latest dispersal of adults and young from nesting areas. Clutch size, brood…
Author(s): Dale M. Becker, Carolyn Hull Sieg
Keywords: Falco columbarius richarsonii, breeding, reproduction, Montana
Source: Raptor Research. 19(2/3): 52-55.
Year: 1985
Demographic processes (reproductive success, survival of young and adults, recruitment of young into the breeding population) are critical to monitoring and managing landbird populations. We discuss different techniques that have been used to monitor these demographic processes in landbird…
Author(s): Nadav Nur, Geoffrey R. Geupel
Keywords: Melospiza melodia, Chamaea fasciata, demographics, migratory birds, monitoring, netting, population dynamics, reproduction, survival, Point Reyes National Seashore, California
Source: In: Finch, Deborah M.; Stangel, Peter W. (eds.). Status and management of neotropical migratory birds: September 21-25, 1992, Estes Park, Colorado. Gen. Tech. Rep. RM-229. Fort Collins, Colo.: Rocky Mountain Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service: 237-244
Year: 1993
We studied 347 nesting attempts on 107 nesting territories of northern goshawks (Accipiter gentilis) on 1,732 km2 of the Kaibab Plateau, Arizona from 1991-1996. Mark and recapture methodology was used to estimate survival probabilities, territory and mate fidelity, turnover on territories, and…
Author(s): Richard T. Reynolds, Suzanne M. Joy
Keywords: Accipiter gentilis, Arizona, capture-recapture, demography, dispersal, fecundity, forest management, Kaibab Plateau, nesting success, northern goshawk, reproduction, spatial distribution, adult and juvenile survival, turnover, territory and mate fidelity, territory occupancy
Source: Final Report for Arizona Game and Fish Heritage Project Number 194045. Fort Collins, CO: U.S. Department of Agriculture Forest Service, Rocky Mountain Research Station. 76 p.
Year: 1998