Title of Dissertation: CRYPTIC DIVERSITY, ECOLOGICAL DIFFERENTIATION AND POPULATION GENETICS OF AN ESTUARINE COPEPOD, ACARTIA TONSA DANA 1849 (COPEPODA: CALANOIDA) Gang Chen, Doctor of Philosophy, 2009 Dissertation directed by: Dr. Matthew P. Hare Assistant Professor, Department of Biology, University of Maryland, College Park Associate Professor, Department of Natural Resources, Cornell Univer...

Two new species of benthopelagic calanoid copepod Bradfordian genera Pseudophaenna japonica sp. nov. and Xantharus dubius are described from collections the Russian-German deep-sea expedition (SoJaBio) to Sea Japan onboard R/V Akademik Lavrentyev, 51st cruise taken close sea bed. The rare Sars, 1902 Andronov, 1981 a aetideid Bradyidius rakuma (Zvereva, 1977) recorded for first time Sea; male B....

A new species of the genus Mastigodiaptomus Light, 1939, named Mastigodiaptomus cuneatussp. n. was found in a freshwater system in the City of Mazatlán, in the northern region of Mexico. Morphologically, the females of this new species are distinguishable from those of its congeners by the following combination of features: the right distal corner of the genital double-somite and second urosomi...

The region between 10 degrees N and 10 degrees S latitude was known to be congenial for distribution of Pleuromamma species. Diel and ontogenetic migrations were observed for Pleuromamma xiphias. Multivariate analyses such as factor analysis on species' abundance and predictive step-up multiple regression models of water quality parameters: temperature, salinity, dissolved oxygen and their firs...