Browsing Publicaciones Científicas by Issue Date

Now showing items 1-20 of 490

OBSERVATIONS ON POPULATIONS OF ADULT BEAVER-BEETLES, PLATYPSYLLUS CASTORIS

Janzen, Daniel H. (1963-10)

While trapping beaver in the Mississippi River bottom-lands below Hastings, Minnesota in March, 1960, many of the twoyear- oIds were found to be heavily infested with the coleopterous ectoparasite, Platypsyllus castoris ...
Notes on the Behavior of Four Subspecies of the Carpenter Bee, Xylocopa (Notoxylocopa) tabaniformis, in Mexico

Janzen, Daniel H. (1964)

Host plants and behavior of males and females of 4 subspecies of the carpenter bee Xylocopa (N otoxylocopa) tabaniformis (illota Cockerell, melallosoma O'Brien and Hurd, rujina Maidl, and tabaniformis Smith) are discussed ...
NOTES ON THE BEHAVIOR OF THE CARPENTER BEE XYLOCOPA FIMBRIATA IN MEXICO (Hymenoptera Apoidea)

Janzen, Daniel H. (1966-10)
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 ...
Insect Societies

Janzen, Daniel H.; M. V., Brian (1967-01)

The study of social insects is inherently a problem in population biology and Brian's short book is the first broad spectrum review which adopts thi philosophy. He discusses the literature on ants, termites, and ...
The Galapagos.

Bowman, R. I.; Janzen, Daniel H. (1967-06)

The Galapagos Islands are repeatedly mentioned in the classical observational literature of evolution and speciation and are much loved by Darwinophiles, but it is only with the publication of this Proceedings of the ...
Proceedings of the Symposium on the Biology of the California Islands

Janzen, Daniel H. (1968-03)

As is customary for symposia with many contributors (27 with 19 papers), the Proceedings of the 1965 symposium on the Biology of the California Islands has only now been published. "The symposium was the natural ...
NOTES ON NESTING AND FORAGING BEHAVIOR OF MEGALOPTA (Hymenoptera: Halictidae) IN COSTA RICA

Janzen, Daniel H. (1968-07)

A nest of the nocturnal bee M egalopta centralis Friese is described from a nearly vertical, 22 mm -diameter dead stick along a road through primary lowland tropical wet forest. The cell substrate is wood fragmented by ...
The deflowering of Central America

Janzen, Daniel H. (1971)
THE ECOLOGICAL SIGNIFICANCE OF AN ARBOREAL NEST OF BOMBUS PULLATUS IN COSTA RICA

Janzen, Daniel H. (1971-04-02)

A Bombus pullatus nest 5.5 m above the ground in the foliage of a banana plant was collected at 1,400 m elevation near San Vito de Java, Costa Rica. Containing 36 presumably virgin queens, 259 workers, and 48 males, the ...
Whither Tropical Ecology?

Janzen, Daniel H. (1972)
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 ...
Protection of Barteria (Passifloraceae) By Pachysima Ants (Pseudomyrmecinae) in a Nigerian Rain Forest

Janzen, Daniel H. (1972-09)

In a Nigerian rain forest, occupation of Barteria fistulosa saplings by Pachysima aethiops ants results in the plants having more leaves, more branches, more leaves per branch, and less damage to the shoot tips than do ...
Conlments on Host-Specificity of Tropical Herbivores and its Relevance to Species Richness

Janzen, Daniel H. (1973)

We havc the working hypothesis th:lt the high species richness of lowland tropical forcsts is maintained in lllajor part by the herbivore COllllllllllity. The ecological proccss is that thcsc consumers prevcnt the best ...
INTERFIELD AND INTERPLANT SPACING IN TROPICAL INSECT CONTROL

Janzen, Daniel H. (1973)

We may assume that the degree of spatial and temporal heterogeneity of tropical crop plants will influence their harvest by insects and by man. 'The question then becomes one of recognizing those types of heterogeneity that ...
COMMUNITY STRUCTURE OF SECONDARY COMPOUNDS IN PLANTS

Janzen, Daniel H. (1973)

It has been suggested that secondary substances in plants form cffective defences against herbivores. This hyputhesis can be tested through experimental field and laboratory studies. For example, it has been shown ...
THE INTERACTION OF SEED PREDATORS AND SEED CHEMISTRY

Janzen, Daniel H. (1973)

Les diiferentes especes de plantes renferment dans Ie meme organe divers produits toxiques. Dans la foret tropicale caduque de Costa-Rica, la plupart des graines d'arbres contiennent diiferents produits toxiques. Dans ...
The Tropics Are More Predictable

Janzen, Daniel H. (1973)
CHEMICAL DEFENCE IN CENTRAL AMERICAN NON-ANT-ACACIAS

Rehr, S. S.; Fenny, P. P.; 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 ...
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 ...

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