The relation of dissolved oxygen to nitrogen in some Atlantic waters

The use of the oxygen content of sea water to indicate the state of biological activity has become such common practice that one is apt to lose sight of the fact that it is subject to certain qualifications…

Dishwashing and Water Conservation: An Opportunity for Environmental Education

Technological advances have continued to improve the cleaning and water efficiency of automatic dishwashers. However, research indicates consumers waste water and energy during the dishwashing process through their actions and decisions. To gain more current information on consumer dishwasher usage, a major university conducted a kitchen usage study that asked questions about dishwashing. The study found that consumers use water unnecessarily by pre-rinsing dishes at the sink before placing them into the dishwasher. Numerous factors underlie this behavior. It seems clear that consumer education about proper dishwashing procedures is needed

An annotated list of the Lepidoptera of Honduras

A biodiversity inventory of the Lepidoptera of Pico Bonito National Park and vicinity, in the Department of Atlantida of northern Honduras, was initiated in 2009 to obtain baseline data. We present a revised checklist of Honduran butterfly species (updated from the initial 1967 lists), as well as the first comprehensive list of Honduran moths. Our updated list includes 550 species of Papilionoidea, 311 Hesperioidea, and 1,441 moth species

An annotated list of the Lepidoptera of Honduras

A biodiversity inventory of the Lepidoptera of Pico Bonito National Park and vicinity, in the Department of Atlantida of northern Honduras, was initiated in 2009 to obtain baseline data. We present a revised checklist of Honduran butterfly species (updated from the initial 1967 lists), as well as the first comprehensive list of Honduran moths. Our updated list includes 550 species of Papilionoidea, 311 Hesperioidea, and 1,441 moth species

Gause's exclusion principle revisited: artificial modified species and competition

Gause's principle of competition between two species is studied when one of them is sterile. We study the condition for total extinction in the niche, namely, when the sterile population exterminates the native one by an optimal use of resources. A mathematical Lotka-Volterra non linear model of interaction between a native and sterile species is proposed. The condition for total extinction is related to the initial number $M_{o}$ of sterile individuals released in the niche. In fact, the existence of a critical sterile-population value $M_{c}$ is conjectured from numerical analysis and an analytical estimation is found. When spatial diffusion (migration) is considered a critical size territory is found and, for small territory, total extinction exist in any case. This work is motived by the extermination agriculture problem of fruit flies in our region.Comment: 11 pages. Published in Jour.Phys.A Math.Gen. 33, 4877 (2000