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sirenian

(Encyclopedia)sirenian sīrēˈnēən [key] or sea cow, name for a large aquatic mammal of the order Sirenia. Living sirenians are the dugong and the manatee, both found in warm, shallow waters in sheltered regions...

Perseus, king of Macedon

(Encyclopedia)Perseus, c.212–166 b.c., last king of Macedon (179–168 b.c.), son and successor of Philip V. He intrigued against his younger brother, Demetrius, eventually bringing about the latter's execution b...

Biscayne Bay

(Encyclopedia)Biscayne Bay bĭskānˈ [key], shallow, narrow inlet of the Atlantic Ocean, c.40 mi (60 km) long, SE Fla. Famous resort areas, including Miami and Miami Beach, are on the NW and NE respectively. Touri...

zoological garden

(Encyclopedia)zoological garden or zoo, public or private park where living animals are kept for exhibition and study. The menageries and aviaries of China, Egypt, and Rome were famous in ancient times. From the la...

conservation of natural resources

(Encyclopedia)conservation of natural resources, the wise use of the earth's resources by humanity. The term conservation came into use in the late 19th cent. and referred to the management, mainly for economic rea...

Prince William Sound

(Encyclopedia)Prince William Sound, large, irregular, islanded inlet of the Gulf of Alaska, S Alaska, E of the Kenai peninsula. It has many bays and good harbors; the large Columbia Glacier flows into Columbia Bay,...

Odum, Eugene Pleasants

(Encyclopedia)Odum, Eugene Pleasants, 1913–2002, American ecologist, b. Newport, N.H., Ph.D. Univ. of Illinois, 1939; son of Howard W. Odum. He joined the department of zoology at the Univ. of Georgia in 1940, ev...

competition, in biology

(Encyclopedia)competition, in biology, relationship between members of the same or different species in which individuals are adversely affected by those having the same living requirements, such as food or space. ...

gorilla

(Encyclopedia)gorilla, an ape, genus Gorilla, native to the lowland and mountain forests of western and central equatorial Africa. The two gorilla species are the western, comprising the western lowland (G. gorilla...

cockroach

(Encyclopedia)cockroach or roach, name applied to some 4,600 species of flat-bodied, oval insects in the order Blattodea. Cockroaches have long antennae, long legs adapted to running, and a flat extension of the up...