Now showing items 21-30 of 138
Non-absorption of ingested lipophilic and amphiphilic allelochemicals by generalist grasshoppers: The role of extractive ultrafiltration by the peritrophic envelope
(John Wiley & Sons, Inc., 1999-10)
The role of the peritrophic envelope in the non-absorption of three allelochemicals ingested by generalist grasshoppers was examined. This study tested the hypothesis that the association of lipophilic and amphiphilic ...
Comparative study of hermit crab responses to shell-related chemical cues
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1996-12)
The responses of Australian hermit crabs to two types of shell-related odor cues were compared. Introduction of gastropod snail odor elicited an increase in grasping of shells in all four species tested ( Clibanarius ...
Effect of regional topography and hydrology on the lacustrine isotopic record of Miocene paleoclimate in the Rocky Mountains
(Elsevier, 1993-03)
Oxygen isotopic compositions of upper Miocene (9.2 m.y.) lacustrine limestone from northwestern Wyoming range from -21.5 to -35.2% (PDB) and are the lightest yet reported for a non-marine carbonate sequence. These values ...
Models of coupled population oscillators using 1-D maps
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-08)
Coupled population oscillators are investigated with the use of coupled logistic maps. Two forms of coupling are employed, reproductive and density. Three biologically distinct situations are investigated: populations ...
The dynamics of evolution: The punctuated equilibrium debate in the social and natural sciences. Edited by Albert Somit and Steven A. Peterson. Itheca, NY: Cornell University Press. 1992. VI + 325 pp. ISBN 0-8014-9763-9. $47.50 (cloth). $17.95 (paper)
(Wiley Subscription Services, Inc., A Wiley Company, 1993-02)
No Abstract.
Arthropod biodiversity loss and the transformation of a tropical agro-ecosystem
(Kluwer Academic Publishers; Chapman & Hall ; Springer Science+Business Media, 1997-07)
The coffee (Coffea arabica) agro-ecosystem in the Central Valley of Costa Rica was formerly characterized by a high vegetational diversity. This complex system has been undergoing a major transformation to capital-intensive ...
A partial systematic revision of the day geckos, Phelsuma Gray, of Madagascar (Reptilia: Squamata: Gekkonidae)
(Elsevier, 1994-11)
Recent survey work in Madagascar has led to significant changes in the systematics of Madagascan Phelsuma. A new species from the Masoala Peninsula in northeastern Madagascar is described, which has a nostril position ...
Kinetic induction of oat shoot pulvinus invertase mRNA by gravistimulation and partial cDNA cloning by the polymerase chain reaction
(Kluwer Academic Publishers; Springer Science+Business Media, 1993-03)
An asymmetric (top vs. bottom halves of pulvini) induction of invertase mRNA by gravistimulation was analyzed in oat shoot pulvini. Total RNA and poly(A) + RNA, isolated from oat pulvini, and two oligonucleotide primers, ...
An epidemiological model of the corn stunt system in Central America
(Elsevier, 1990)
There is increasing appreciation on the part of ecologists of the crucial role that pathogens may play in the structure of plant populations and communities. This study used classic equations of epidemiology to analyze ...