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Full-Text Articles in Life Sciences
Peet: Biogeography, Morphology, And Molecular Systematics Of Cumaceans: Training Taxonomists For The 21st Century, Leslie E. Watling, Irving Kornfield
Peet: Biogeography, Morphology, And Molecular Systematics Of Cumaceans: Training Taxonomists For The 21st Century, Leslie E. Watling, Irving Kornfield
University of Maine Office of Research Administration: Grant Reports
The crustacean order Cumacea is largely unknown for large areas of the world's oceans and continental margins. Cumaceans are small crustaceans, allied with amphipods, isopods, and several other groups, all of whom carry their young about in a brood pouch. In many shallow marine habits they are important food items in the diets of young fish. Virtually nothing is known about the evolutionary history of the group. There is also uncertainty associated with many of the characters used in the taxonomy of cumaceans, a feature which characterizes several other groups of small crustaceans, therefore, principles developed for this group may …
Food Substrates And Digestive Capabilitites Of Marine Deposit Feeders, Lawrence M. Mayer
Food Substrates And Digestive Capabilitites Of Marine Deposit Feeders, Lawrence M. Mayer
University of Maine Office of Research Administration: Grant Reports
Deposit feeders play several important roles in determining whether organic material is demineralized or buried. These animals function to make surfaces available for microbial growth and move particles both horizontally and vertically within the seabed at a pace that far exceeds sedimentation. The central problem in understanding deposit feeders is to identify the materials that they utilize and to determine the sources of those materials. The interdisciplinary approach of this project is to combine a chemical reactor theory of digestion with measurements of the processing of enzymatically available amino acids, focusing on rates of hydrolysis in, and absorption from, the …
The Effect Of Gamete Competition On Levels Of Gamete Production In A Marine Invertebrate, Kevin J. Eckelbarger
The Effect Of Gamete Competition On Levels Of Gamete Production In A Marine Invertebrate, Kevin J. Eckelbarger
University of Maine Office of Research Administration: Grant Reports
Previous work suggests that high population densities result in more intense male gamete competition and select for increased levels of production of these gametes. This hypothesis will be tested by examining spatial and temporal correlations between density and male gamete production levels in natural populations of a colonial ascidian. Two additional considerations which might modify the effect that male gamete competition has on levels of male gamete production will also be explored. First, natural selection can only act on the genetic portion of total phenotypic variance. Secondly, selection acts simultaneously on the entire phenotype, and so the effect of selection …
Fsml: Construction Of Visiting Investigator/Classroom Building At Darling Marine Center, Kevin J. Eckelbarger
Fsml: Construction Of Visiting Investigator/Classroom Building At Darling Marine Center, Kevin J. Eckelbarger
University of Maine Office of Research Administration: Grant Reports
Since 1991, the University of Maine has made significant financial investments in its marine laboratory, the Darling Marine Center to equally benefit both University personnel and visiting colleges and researchers. During 1997-99 alone, the University supported improvements including a student dormitory/dining hall. New flowing seawater facilities (construction to begin spring 2000), a new 42' coastal research vessel (under construction), and more classroom microscopes and computers (delivered and in use) have also been supported. All of these improvements directly benefit visitors and they reflect a stated policy of encouraging increased use of the facilities by visiting investigators and outside colleges. Extensive …
Powre: A Pilot Study Of Chemoreception Mechanisms In Deposit-Feeding Polychaetes, Sara M. Lindsay
Powre: A Pilot Study Of Chemoreception Mechanisms In Deposit-Feeding Polychaetes, Sara M. Lindsay
University of Maine Office of Research Administration: Grant Reports
This proposal was submitted to the NSF-wide Professional Opportunities for Women in Research and Education (POWRE) program. The PI proposes to begin research on the sensory mechanisms coordinating chemoreception in spionid polychaetes, a common deposit-feeding invertebrate. These worms are widely distributed in soft-sediment benthic marine environments and, along with other deposit-feeders, are responsible for the bioturbation that is important to this environment. Some evidence indicates that chemoreception may coordinate sediment ingestion rate and other aspects of deposit-feeding in a variety of species. The proposed research will attempt to identify some of the physiological and molecular mechanisms used by the worms …