Publicaciones Científicas: Recent submissions

Now showing items 241-260 of 490

BIOGEOGRAPHY OF AN UNEXCEPTIONAL PLACE, WHAT DETERMINES THE SATURNIID AND SPHINGID MOTH FAUNA OF SANTA ROSA NATIONAL PARK, COSTA RICA, AND WHAT DOES IT MEAN TO CONSERVATION BIOLOGY?

Janzen, Daniel H. (1986)

Santa Rosa Nat ional Park is an arbitrarily defined 108 km1 patch of dry fo rest in the northwestern Pacific coastal lowlands of Costa Rica. It has a saturniid moth fau na of 30 breeding species (and 5 waif species) and ...
Biochemical Ecology of Canavanine-Eating Seed Predators

Bleiler, John A.; Rosenthal, Gerald A.; Janzen, Daniel H. (1988-04)

L-canavanine, a nonprotein amino acid structurally similar to L-arginine, is potentially toxic to many insects. In northwestern Guanacaste Province in Costa Rica, most insect seed predators do not feed on seeds that ...
Bee arrival at two Costa Rican female Catasetum orchid inflorescences, and a hypothesis on euglossine population structure

Janzen, Daniel H. (1981)

It is well known that Cataseturn flowers are pollinated by male euglossine orchid bees (Criiger 1865, Darwin 1877, Dodson 1962, Pijl and Dodson 1966). The bees remove several chemicals from Cataseturn (and other orchid) ...
ANNOTATED CHECK-LIST OF PLANTS OF LOWLAND GUANACASTE PROVINCE, COSTA RICA, EXCLUSIVE OF GRASSES AND NON-VASCULAR CRYPTOGAMS

Janzen, Daniel H.; Liesner, Ronald (1980)

Since 1961 a series of field biologists and field ecology courses have used the lowlands of Guanacaste Province, Costa Rica, as a natural laboratory. With the firm establishment of Santa Rosa National Park and various ...
AN ABANDONED FIELD IS NOT A TREE FALL GAP

Janzen, Daniel H. (1990)

The Nc:otropK:S are rich in mosaics of foresl and aodent-tomcxIem pastures and fields. In most of Ibcsc mosaics, the original and late sc:oond -growth forest is rapidl)' dwindling in area and the clearings an: enlarging ...
AMMONIA UTILIZATION BY THE BRUCHID BEETLE, Caryedes brasiliensis [BRUCHIDAE]

Rosenthal, Gerald A.; Janzen, Daniel H. (1984-08-22)
AFFIRMATIVE ACTION FOR INSECTS IN TROPICAL NATIONAL PARKS

Janzen, Daniel H. (1989)

The conselVation of a tropical wildland InlO perpetuity demands that h o.ffer a product 10 hs neighbors and other users. This product must be offered with a minimal loss 01 biodiversity in the conserved witdland. All ...
A VOIDANCE OF NONPROTEIN AMINO ACID INCORPORATION INTO PROTEIN BY THE SEED PREDATOR, Caryedes brasiliensis (BRUCHIDAE)

Rosenthal, G.A.; Janzen, Daniel H. (1982-12-14)

Larvae of the bruchid beetle, Caryedes brasiliensis (Bruchidae) have the ability to avoid significant incorporation of L-canavanine, the guanidinooxy structural analog of L-arginine, into de novo synthesized proteins. ...
A seasonal census of phenolics, fibre and alkaloids in foliage of forest trees in Costa Rica: SODle factors influencing their distribution and relation to host selection by Sphingidae and Saturniidae

Janzen, Daniel H. (1983-03-23)

The foliage of 80 species common in the Santa Rosa National Park, Costa Rica, has been analysed for content of total phenolics, condensed tannins, acid detergent fibre and water. Wherever possible analyses were performed ...
A dry tropical forest ecosystem restored

Janzen, Daniel H. (1983)

People are raJl)'lng In countries of the South as weU as the Nurth to preserve tropical rain forests. Tropical dry foresli. on the other hand. have excited and organized mucl! less public interest and con· cern. These ...
A broad look at prospect for restoration in Central and South America raises some basic questions about methods about goals, and about the restorationist's role in evolution

Janzen, Daniel H. (1992)
2,4-Methanoproline (2-Carboxy-2,4-methanopyrrolidine) and 2,4-Methanoglutamic Acid (l-Amino-l ,3-dicarboxycyclobutane) in Seeds of Ateleia herbert smithii Pittier (Leguminosae)

E., Arthur Bell; M., Yasin Qureshi; Pryce, Robert J.; Janzen, Daniel H.; Lemke, Paula; Clardy, Jon (1979-06-25)

A new acidic amino acid, 2,4-methanoglutamic acid, containing a cyclobutane ring and a new imino acid, 2,4-methanoproline, containing the previously unknown 2-azabicyclo[2.1.I)hexane system have been isolated from seeds ...
Serpentine Landscapes of Costa Rica The Santa Elena Peninsula

Alexander, Earl B. (2018)

Costa Rica is on the trailing edge of the Carribean Plate, a plate that was initially produced over a hot spot, or mantle plume, in the Pacific Ocean during the Jurassic period (Mann 2007). The Carribean plate drifted ...
Why Tropical Trees Have Rotten Cores

Janzen, Daniel H. (1976-06)
Whither Tropical Ecology?

Janzen, Daniel H. (1972)
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 ...
Use of Santa Rosa National Park and Corcovado National Park, Costa Rica, by biologists. Uso de Parque Nacional Santa Rosa y Parque Nacional Corcovado, Costa Rica, por biólogos.

Janzen, Daniel H. (1977-09)
The role of the seed predator guild in a tropical deciduous forest, with some reflections on tropical biological control

Janzen, Daniel H.; Price D., Jones; Solomon, M. E. (1972-01)

What effect does the array of animals that kill seeds (and seedlings), henceforth termed the seed predator guild, have on the community structure of the plants in a forest? In north temperate forests, one of the major ...
Seeding patterns of tropical trees

Tomlinson, P. B.; Zimmermann, Martin H.; Janzen, Daniel H. (1976-04-30)
The Occurrence of the Human Warble Fly (Dermatobia hominis) in the 'Dry .Deciduous Forest Lowlands of Costa Rica

Janzen, Daniel H. (1967)

In 1967, Banegas and coworkers stated clearly that Dermatobia hominis is "unable to survive the prolonged dry season in the lowlands along the Pacific coast" of Central America. While this statement may be true for the ...

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