Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Overwinter survival of neotropical migratory birds in early-successional and mature tropical forests Overwinter survival of neotropical migratory birds in early-successional and mature tropical forests
Many Neotropical migratory species inhabit both mature and earty-successional forests on their wintering grounds, yet comparisons of survival rates between habitats are lacking. Consequently, the factors affecting habitat suitability for Neotropical migrants and the potential effects of tropical deforestation on migrants are not well understood. We estimated overwinter survival and...
Authors
C.J. Conway, G.V.N. Powell, J.D. Nichols
Taxonomy of the genus Lycalopex (Carnivora: Canidae) in Argentina Taxonomy of the genus Lycalopex (Carnivora: Canidae) in Argentina
Previously treated as species of Pseudalopex, Argentine members of the genus Lycalopex (L. griseus, L. gymnocercus, and L. culpaeus) are examined to clarify the taxonomic status of each named form. Principal components analyses of 26 cranial measurements of 151 adult specimens and 11 pelage characters of 111 specimens, clearly distinguish L. culpaeus from the other two taxa. Lycalopex...
Authors
G.E. Zunino, O.B. Vaccaro, M. Canevari, A. L. Gardner
[Book review] Aquatic Toxicology: Molecular, Biochemical and Cellular Perspectives, edited by Donald C. Malins and Gary K. Ostrander [Book review] Aquatic Toxicology: Molecular, Biochemical and Cellular Perspectives, edited by Donald C. Malins and Gary K. Ostrander
No abstract available.
Authors
R. Eisler
Selenium, boron, and heavy metals in birds from the Mexicali Valley, Baja California, Mexico Selenium, boron, and heavy metals in birds from the Mexicali Valley, Baja California, Mexico
No abstract available.
Authors
M.A. Mora, D. W. Anderson
Year-round movements of a Wahlberg's Eagle Aquila wahlbergi tracked by satellite Year-round movements of a Wahlberg's Eagle Aquila wahlbergi tracked by satellite
An adult female Wahlberg's Eagle from northern Namibia was tracked by satellite ovcr a total distance of 8816 km and located 104 times between 11 February and 4 November 1994. It migrated on an almost due north heading to northern Cameroon, north-eastern Nigeria and western Chad through the rain forest belt of the Congo and Zaire after the breeding season. The total trans-equatorial...
Authors
B.-U. Meyburg, J.M. Mendelsohn, D. H. Ellis, D.G. Smith, C. Meyburg, A.C. Kemp
Patrones de crecimiento de las tortugas gigantes (Geochelone ephippium) de la Isla de Pinzon, Galapagos Patrones de crecimiento de las tortugas gigantes (Geochelone ephippium) de la Isla de Pinzon, Galapagos
No abstract available.
Authors
R.A. Siaca, T. H. Fritts
Responses of amphibian populations to water and soil factors in experimentally-treated aquatic macrocosms Responses of amphibian populations to water and soil factors in experimentally-treated aquatic macrocosms
Survival of anuran embryos and tadpoles is reduced in acidic (pH
Authors
D. W. Sparling, T. P. Lowe, D. Day, K. Dolan
Variations in growth of roseate tern chicks Variations in growth of roseate tern chicks
We measured growth parameters of Roseate Tern (Sterna dougallii) chicks at two contrasting colonies: Bird Island, Massachusetts, and Falkner Island, Connecticut, from 1987 through 1990. Differences in growth parameters among individual chicks are used to explore differences in parental performance, whereas differences in average growth parameters among colonies and years are used to...
Authors
I.C.T. Nisbet, J. A. Spendelow, Jeff S. Hatfield
A colored leg banding technique for Amazona parrots A colored leg banding technique for Amazona parrots
A technique for individual identification of Amazona was developed using plastic leg bands. Bands were made from 5- and 7-mm-wide strips of laminated PVC coiled 2.5 times with an inside diameter 4-5 mm gt the maximum diameter of the parrot's leg. Seventeen parrots were captured in Puerto Rico, marked with individual plastic leg bands, and observed for 204-658 d with only one lost or...
Authors
J.M. Meyers
Minnesota wolf dispersal to Wisconsin and Michigan Minnesota wolf dispersal to Wisconsin and Michigan
Records are presented of three wolves that dispersed ≥200 km from northern Minnesota to the Minnesota-Wisconsin border, to southern Wisconsin, and to Michigan. This report documents that wolves cross major highways and other developed areas and that the recently recolonized wolf population in Wisconsin and Michigan could have originated from wolf populations in Minnesota other than those...
Authors
L.D. Mech, S. H. Fritts, D. Wagner
Estimating annual survival and movement rates of adults within a metapopulation of roseate terns Estimating annual survival and movement rates of adults within a metapopulation of roseate terns
Several multistratum capture—recapture models were used to test various hypotheses about possible geographic and temporal variation in survival, movement, and recapture/resighting probabilities of 2399 adult Roseate Terns (Sterna dougallii) color—banded from 1988 to 1992 at the sites of the four largest breeding colonies of this species in the northeastern USA. Linear—logistic...
Authors
Jeffrey A. Spendelow, James D. Nichols, Ian C. T. Nisbet, Helen Hays, Grace Cormons, Joanna Burger, C. Safina, James E. Hines, Michael Gochfeld
Changes in total body calcium and diet of breeding house sparrows Changes in total body calcium and diet of breeding house sparrows
We collected House Sparrows Passer domesticus around London, Ontario, estimated their total body calcium masses, food habits and egg production to test for the effects of endogenous calcium levels on control of clutch size. Before egg production began, calcium levels increased significantly and remained high through the end of egg laying, and then declined significantly after egg laying...
Authors
D.G. Krementz, C.D. Ankney