[Personnel: Last_Name='STEVENS', Middle_Name='B.', First_Name='TYLER']
Aspects of the Life History and Foraging Ecology of the Endangered AkiapolaauEntry ID: brdpier0004
Abstract: Relative abundance, breeding ecology, annual survival, home range, and
foraging ecology of the Akiapolaau (Hemignathus munroi), an endangered Hawaiian
honeycreeper, were studied on the island of Hawaii. The species is a
specialist; Akiapolaau used koa (Acacia koa) for foraging much more than
expected based on koa availability, and most Akiapolaau occurred in old-growth
koa and ohia (Metrosideros ... polymorpha forests. Male Akiapolaau most often
foraged on the trunks and large branches of koa, whereas females used small
branches and twigs. The longer bill of males is apparently adapted to the
greater bark thickness of larger branches. Lichen-covered and dead branches
were preferred feeding sites. Akiapolaau showed serial monogamy and had a
relatively low reproductive rate of 0.86 young per par per year, with a long
parental dependency period. Home range sizes averaged 10.7 ha and did not
differ between males and females. Annual survival for adults was 0.71. Avian
diseases appear to restrict Akiapolaau to higher elevation forests where
mosquitos are rare. Protection of remaining old-growth koa and ohia forests
above the mosquito zone are critical to the survival of the species.
Akiapolaau were studied at five study sites on Hawaii: Keauhou
Ranch (19.52, -155.33; 1,740 m elevation), Kilauea Forest (19.52,
-155.32 1,630 m), Hamakua (19.78 -155.33; 1,770 m), Kau Forest (19.22,
-155.65; 1,750 m), and a Dry Forest site (19.82, -155.55 1,865-2,800
m). 1.5.2 Bounding Rectangle Coordinates
25-162 stations were surveyed each month at each study site using the
variable circular-plot method with 8-minute counts (Scott et al. 1986) to
obtain indices of Akiapolaau abundance.
Purpose: To study the life history and foraging ecology of the endangered
Data Set Citation
Dataset Originator/Creator: C. John Ralph and Steven G. Fancy
Dataset Title: Aspects of the life history and foraging ecology of the endangered Akiapolaau
Dataset Release Date: 1996
Dataset Release Place: Hawaii National Park, HI
Dataset Publisher: National Biological ServiceOnline Resource: http://biology.usgs.gov/pierc/PLWoodworth2HAKALAU2.htm
Start Date: 1976-11-01Stop Date: 1982-01-31
BIOSPHERE > ECOSYSTEMS > TERRESTRIAL ECOSYSTEMS > FORESTS
BIOSPHERE > ECOSYSTEMS > TERRESTRIAL ECOSYSTEMS > ISLANDS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES LIFE HISTORY
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > MIGRATORY RATES/ROUTES
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > USE/FEEDING HABITATS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > RANGE CHANGES
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > ENDANGERED SPECIES
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SURVIVAL RATES
ISO Topic Category
Access Constraints none
Use Constraints none
Data Set Progress
Role: TECHNICAL CONTACT
Phone: (970) 225-3571
Email: steve_fancy at nps.gov
National Park Service Natural Resource Information Division 1201 Oak Ridge Drive, Suite 150
City: Fort Collins
Province or State: CO
Postal Code: 80525-5589
Role: DIF AUTHOR
Phone: (301) 614-6898
Email: Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: MD
Postal Code: 20771
C.John Ralph and Steven G. Fancy. 1996. Aspects of the life history and
foraging ecology of the endangered Akiapolaau, The Condor, 98, pp 312-321.
Scott, J.M., S. Mountainspring, F.L. Ramsey, and C.B. Kepler. 1986. Forest bird communities of the Hawaiian Islands: Their dynamics, ecology and conservation. Stud. in Avian Biol., 9, pp. 1-431.
Ralph, C.J. and S.G.Fancy. 1994. Demography and movements of the endangered
Hawaii Creeper and Hawaii Akepa, Wilson Bull., 106, pp. 615-628.
Ralph, C.J., G.R. Geupel, P. Pyle, T.E. Martin, and D.F. DeSante. 1993. Manual of field methods for monitoring land birds, General Technical Report PSW-GTR, U.S. Forest Service, Albany, CA, pp. 165-174.
Pratt, T.K., S.G. Fancy, C.K. Harada, G.D. Lindsey, and J.D. Jacobi. 1994.
Identifying sex and age of Akiapolaau, Wilson Bull., 106, pp. 421-430.
Pyle, P., S.N.G. Howell, R.P. Yunick, and D.F. DeSante. 1987. Identification guide to North American paasserines, Slate Creek Press, Bolinas, California, 278 p.
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Creation and Review Dates
Last DIF Revision Date: 2016-11-18