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Filter Total Items: 3356

Habitat Suitability Index Models: Great egret

The great egret, also called common egret or American egret, is a large white heron tn the order Ciconiiformes, family Ardeidae. Great egrets stand 94.0-104.1 cm (37-41 inches) tall and have a wing spread to 139.7 cm (55 inches) (Terres 1980). The species is associated with streams, ponds, lakes, mud flats, swamps, ahd freshwater and salt marshes. The birds feed in shallow water on fishes, amphibi
Authors
Brian R. Chapman, Rebecca J. Howard

Contaminant concentrations in manatees in Florida

The status of the endangered manatee (Trichehus manatus) in relation to organochlorine pesticides, polychlorinated biphenyls, mercury, lead, cadmium, copper, iron, and selenium was investigated in Florida from 1977 to 1981. Concentrations of organochlorines in blubber, mercury in muscle and liver, lead in liver, and lead and cadmium in kidneys did not indicate high exposure to these contaminants.
Authors
T. J. O'Shea, John F. Moore, H. I. Kochman

Adaptive variation in offspring size in the terrestrial isopod, Armadillidium vulgare

Variation in the birth size of offspring of the terrestrial isopod, Armadillidium vulgare, was observed in laboratory experiments and in field populations. In the laboratory, larger offspring were produced when the mother's food supply was reduced. In field populations, larger offspring were produced during the summer, a period of reduced food availability. Smaller offspring are produced in the sp
Authors
M.S. Brody, L.R. Lawlor

Mapping of forested wetland: Use of seasat radar images to complement conventional sources

Distinguishing forested wetland from dry forest using aerial photographs has been handicapped because photographs often do not reveal the presence of water below the tree canopies. Images obtained during the summer months of 1978 by the Seasat satellite's L-band (23-cm) radar reveal forested wetland as patterns of high radar reflection in the Atlantic coastal plain between Maryland and Florida. Po
Authors
John L. Place

Reproduction by the endangered cui-ui in the lower Truckee River

Adult spawning behavior and emigration of larvae of the endangered cui-ui Chasmistes cujus were studied in a natural side channel of the lower Truckee River. External radio-tags placed on eight apparently did not affect spawning behavior. Cui-uis spawned in clusters of two to seven fish; usually a single female was flanked by two males. Each spawning act lasted 3–6 seconds, and individual fish spa
Authors
G.G. Scoppettone, Gary Wedemeyer, M. Coleman, H. Burge

The effects of meiofauna on settling macrofauna: meiofauna may structure macrofaunal communities

When macrofaunal larvae and juveniles recruit into the benthos, they are in the same size category as the meiofauna. These small size classes have been consistently ignored in macrofaunal studies despite the increasingly accepted idea that communities are structured not only by interactions between adults, but also by interactions which occurred when the animals were young and in the meiofaunal si
Authors
Mary C. Watzin

Use of a gis for Gulf of Mexico wetland change

No abstract available.
Authors
James B. Johnston, Robert Ader