16,399 research outputs found
Use of Injectable Eugenol for Euthanasia and Anesthesia of American Lobsters (Homarus Americanus) and Similar Species
Crustaceans are economically and ecologically significant, but current treatment and diagnostic protocols for crustacean health are limited. According to standards given by the American Veterinary Medical Association there are no current methods of euthanizing lobsters, nor are there effective methods of quick release anesthesia. The objective of this research demonstrated that eugenol by direct injection is a safe, efficient and reliable method for euthanizing or anesthetizing crustaceans. Anesthetic levels were determined by behavior responses, death was determined by a lack of response to stimuli. The results presented here suggest eugenol can be used as a euthanizing agent for American lobsters (Homarus americanus) and green crabs (carcinus maenas) injected into the sinusoidal circulatory system at a dose of 7µl/g dissolved in a solution of 70% ethanol and sterile sea water injected into the pericardial sac
Introduced Species in United States Coastal Waters
This pdf document commissioned by the Pew Ocean Commission describes the problem of invasive species along the United States coastline. The document provides information regarding how bioinvasions occur, the number of invasive species introduced, the effects of bioinvasions, prevention, reduction and control of marine bioinvasions and recommendations for action against invasive species invasion. The pdf also provides a glossary of bioinvasion terms. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division
Moduli for Pairs of Elliptic Curves with Isomorphic N-torsion
We study the moduli surface for pairs of elliptic curves together with an
isomorphism between their N-torsion groups. The Weil pairing gives a
"determinant" map from this moduli surface to (Z/NZ)*; its fibers are the
components of the surface. We define spaces of modular forms on these
components and Hecke correspondences between them, and study how those spaces
of modular forms behave as modules for the Hecke algebra. We discover that the
component with determinant -1 is somehow the "dominant" one; we characterize
the difference between its spaces of modular forms and the spaces of modular
forms on the other components using forms with complex multiplication. Finally,
we show some simplifications that arise when N is prime, including a complete
determination of such CM-forms, and give numerical examples.Comment: 30 page
A survey of selected coastal vegetation communities of Florida
A survey of coastal vegetation around Florida
was conducted during 1973 and 1974. Seventeen sites were selected and sampled
using the transect method to determine species occurrence, relative densities, and
habitat development and structure. Sites were sampled quarterly except where high
tides prevented data gathering. Species occurrence was compared within and
between sites using Sarensen's Index of Similarity (IS,) as a basis for determining
similarity of species inhabiting selected sites. Indices ranged from 4 to 61%, the
former representing only one plant common to two sites. Results show
environmental factors acting upon species alter species composition in seemingly
similar habitats. Instead of the term "community", the term "association" is used to
better reflect the concept of a taxonomically unrelated group of plants occupying a
particular habitat. (Document has 40 pages.
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