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CHEMICAL DEFENCE IN CENTRAL AMERICAN NON-ANT -ACACIAS

S. S., Rehr; P. P., Feeny; Janzen, Daniel H. (1973-06)

On the basis of their association with ants, neotropical species of the genus Acacia may be grouped into two broad categories. 'Ant-acacias', comprising less than 10% of the species in Central America depend in varying ...

Embryonic Field of Ecology

Janzen, Daniel H. (1973-12-14)

In the introduction to this volume Southwood establishes a framework for considering the evolution, nature, and mechanisms of the insect-plant relationship. Rothschild in "Secondary plant substances and warningcolouration in ...

FOOD AND FEEDING BEHAVIOR OF A CAPTIVE COSTA RICAN LEAST PIGMY OWL GLAUCIDIUM MINUTISSIMUM RARUM GRISCOM. (AVES: STRIGIDAE)

Janzen, Daniel H.; M. Pond, Caroline (1974)

A captive nearly mature least pigmy owl Glaucidium minutissimum rarum Griscom from Limon Province was found to eat a very wide variety of animals and animal parts. When capturing prey or taking food she always closed ...

What the Tropical Trappers Leave Behind

Janzen, Daniel H.; Mckey, D. (1975)

While living with trappers (snarers) of wild game in the Cameroun rainforest preserve at Lake Tissongo (south of Edea on the Sanaga River, October 1974), we had the opp:Jrtunity to observe two aspects of hunting that ...

A comparison, by sweep sampling, of the arthropod fauna of secondary vegetation in Michigan, England and Costa Rica

Janzen, Daniel H.; M. Pond, Caroline (1975)

1. Six 8oo-sweep samples of English and Michigan ("old field") secondary vegetation arthropods are compared with Costa Rican samples taken in the same way. 2. Parasitic Hymenoptera and spiders accounted for a larger ...

Social Systelns, Sex.

Janzen, Daniel H.; Reichel, Gerardo (1975)

Tropical Ecology

B. Golley, Frank; Medina, Ernesto; Janzen, Daniel H. (1975-09)

This symposium volume reads like the first 25 papers dealing with the tropics to be found in a miscellaneous collection of standard and substandard journals of ecology! limnology!evolution. Tropical ecology has for long ...

Natural Resources of Humid Tropical Asia. Natural Resources Research, Volume XII.

Janzen, Daniel H. (1975-12)

Fire on the western forests of the United States is also very good, but contains but four short paragraphs on Alaskan forests. The chapter on forest and savanna ecosystems of Sub-Saharan Africa covers too large an area ...

The Ecology and Evolutionary Biology of Seed Chemistry as Relates to Seed Predation

Janzen, Daniel H. (1976)

My goal is to understand the ecological significance of seed chemistry to the seed and to its potential consumers and to identify some of the selection pressures by seed predators that may lead to and maintain chemical ...

TWO COSTA RICAN BAT-GENERATED SEED SHADOWS OF ANDIRA INERMIS (LEGUMINOSAE)

Janzen, Daniel H.; Miller, G. A.; Hackforth-Jones, J.; Pond, C. M.; Hooper, K.; Janos, D. P. (1976)

Bat-generated seed shadows of two mature Andira inermis (W. Wright) DC. trees in the deciduous forest lowlands of Guanacaste Province, Costa Rica, are highly heterogeneous; very unequal numbers of seeds are deposited ...

Effect of Defoliation on Fruit-bearing Branches of the Kentucky Coffee Tree, Gymnocladus dioicus (Leguminosae)

Janzen, Daniel H. (1976)

By artificially defoliating fruit-bearing branches of a Kentucky Coffee Bean tree (Gymnocladus dioicus), it was shown that seed weight and secondary compound chemistry are not well buffered against foliage damage, a ...

Additional Land at What Price? -Responsible Use of the Tropics in a Food-Population Confrontation

Janzen, Daniel H. (1976)

Department of Ecology and Evolutionary Biology, Division of Biology, University of Michigan, Ann Arbor 48104. Present address: Department of Biology, University of Pennsylvania, Philadelphia, PA 19174. This study was ...

Too-Using by the African Grey Parrot (Psittacus erithacus)

Janzen, Daniel H.; M. Pond, Caroline (1976-03)

Our pet African grey parrot (origin: Cameroon), living in a free-flight wood and screen indoor cage (3 x 2 x 1 m), uses 1.5-4cm long splinters of wood to scratch the skin on the posterior part of its head.

Seeding patterns of tropical trees

Tomlinson, P. B.; Zimmermann, Martin H.; Janzen, Daniel H. (1976-04-30)

Why Tropical Trees Have Rotten Cores

Janzen, Daniel H. (1976-06)

INTENSITY OF PREDATION ON PITHECELLOBIUM SAMAN (LEGUMINOSAE) SEEDS BY MEROBRUCHUS COLUMBINUS)' AND STATOR LlMBATUS (BRUCHIDAE) IN COSTA RICAN DECIDUOUS FOREST

Janzen, Daniel H. (1977)

The rain tree, or "genizaro" ("cenizaro") (Pithecellobium saman (Jacq.) Benth. =Samanea saman (.Jacq.) Merrill) is common throughout the lowlands of Central America and much of South America, and has b"cn introduced ...

DEVELOPMENTAL DEMOGRAPHY OF BAUHINIA PAULETIA PERS. (LEGUMINOSAE) SEEDS AND OVULES

Janzen, Daniel H. (1977)

INTENSITY OF PREDATION ON PITHECELLOBIUM SAMAN (LEGUMINOSAE) SEEDS BY DEROBRACHUS COLUMBINUS)' AND STATOR LlMBATUS (BRUCHIDAE) IN COSTA RICAN DECIDUOUS FOREST

Janzen, Daniel H. (1977)

The rain tree, or "genizaro" ("cenizaro") (Pithecellobium saman (Jacq.) Benth. =Samanea saman (.Jacq.) Merrill) is common throughout the lowlands of Central America and much of South America, and has b"cn introduced ...

Additional Land at What Price? -Responsible Use of the Tropics in a Food-Population Confrontation

Janzen, Daniel H. (1977)

Department of Ecology and Evolutionary Biology, Division of Biology, University of Michigan, Ann Arbor 48104. Present address: Department of Biology, University of Pennsylvania, Philadelphia, PA 19174. This study was ...

Biological Pest Control

Janzen, Daniel H. (1977-04)

Beginning in about 1965, the IBP psychologically and financially supported variously coordinated studies of the basic biology of five major widespread arthropod pests: fruit flies (Tephritidae), Myzus persicae, rice ...

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