Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Marine Biology (10)
- Physical Sciences and Mathematics (9)
- Oceanography (7)
- Oceanography and Atmospheric Sciences and Meteorology (7)
- Animal Sciences (4)
-
- Ecology and Evolutionary Biology (4)
- Biochemistry (3)
- Biochemistry, Biophysics, and Structural Biology (3)
- Fresh Water Studies (3)
- Physiology (3)
- Zoology (3)
- Biology (2)
- Aquaculture and Fisheries (1)
- Biostatistics (1)
- Botany (1)
- Cell and Developmental Biology (1)
- Developmental Biology (1)
- Endocrinology (1)
- Environmental Sciences (1)
- Natural Resources Management and Policy (1)
- Plant Sciences (1)
- Statistics and Probability (1)
- Terrestrial and Aquatic Ecology (1)
Articles 1 - 21 of 21
Full-Text Articles in Life Sciences
The Quantitative Role Of Hemoglobin In Oxygen Uptake And Oxygen Storage In The Ponderosa Ark Clam, Noetia Ponderosa, Lewis Edward Deaton
The Quantitative Role Of Hemoglobin In Oxygen Uptake And Oxygen Storage In The Ponderosa Ark Clam, Noetia Ponderosa, Lewis Edward Deaton
Dissertations, Theses, and Masters Projects
No abstract provided.
Mechanisms Of Isosmotic Intracellular Regulation In Marine Molluscs, William D. Dupaul
Mechanisms Of Isosmotic Intracellular Regulation In Marine Molluscs, William D. Dupaul
Dissertations, Theses, and Masters Projects
No abstract provided.
Variations In Major Cations And Certain Heavy Metals In The Serum Of The Blue Crab, Callinectes Sapidus, James Alden Colvocoresses
Variations In Major Cations And Certain Heavy Metals In The Serum Of The Blue Crab, Callinectes Sapidus, James Alden Colvocoresses
Dissertations, Theses, and Masters Projects
No abstract provided.
Biology Of The Rock Crab, Cancer Irroratus Say, In Coastal Waters Of Virginia, Lewis Roller Shotton
Biology Of The Rock Crab, Cancer Irroratus Say, In Coastal Waters Of Virginia, Lewis Roller Shotton
Dissertations, Theses, and Masters Projects
The commercial seabass notting fishery and the trawl fishery in the Blackfish Bank area east of the entrance to Chincoteague Bay were used to study the biology of the rock crab, Cancer irroratus Say. Highest relative abundance of rock crabs occured in February, March, and April when coldest inshore (<30m) bottom water temperatures occurred. Relative abundance during all other months was extremely low. The apparent seasonal change in relative abundance may be due to an inshore-offshore seasonal migration of mature crabs following the seasonal inshore-offshore shift of colder bottom water. Male rock crabs grow to a significantly larger size than females. The carapace width range of males captured in the potting fishery was 66 to 141 mm; and 25 to 106 mm for females. In the trawl fishery the width range for males was 20 to 137 mm; and 22 to 102 mm for females. In both pot and trawl catches the male to female ratio was biased in favor of males. Males comprised 92% of the pot catch and 84% of all crabs captured by trawl. From August through December all crabs were in the hard shell intermolt stage. Small percentages of soft crabs occurred from January through June. Papershell crabs predominated in February, March and April. It is probable that most crabs molted in January and the process of exoskeleton hardening took several months. Ovigerous females were captured in seabass pots in April and June and in trawls from February through April. All ovigerous crabs were in hard shell condition. Gondal inspection of males and the presence of eggs on females indicated that rock crabs mature at a relatively small size (30 mm carapace width). Female rock crabs have a deeper body and wider abdomen than equivalent width males. Abdomen width grows more rapidly for females after the onset of sexual maturity than before. Mature females have a longer carapace than equivalent width males. Male and female regressions of chela length on carapace width could not be compared statistically but plots of the equations suggest no sexual difference. This dissertation is from the Joint Program Degree from the College of William & Mary and University of Virginia and awarded by the University of Virginia.
The Hermit Crabs (Crustacea, Decapoda, Anomura) Collected By The International Indian Ocean Expedition, 1963-1964, With Notes On Their Distribution And The Zoogeography Of The Western Indian Ocean, Philip Dalton Witherington
The Hermit Crabs (Crustacea, Decapoda, Anomura) Collected By The International Indian Ocean Expedition, 1963-1964, With Notes On Their Distribution And The Zoogeography Of The Western Indian Ocean, Philip Dalton Witherington
Dissertations, Theses, and Masters Projects
No abstract provided.
Angiosperm Production Of Three Virginia Marshes In Various Salinity And Soil Nutrient Regimes, Irving Avrum Mendelssohn
Angiosperm Production Of Three Virginia Marshes In Various Salinity And Soil Nutrient Regimes, Irving Avrum Mendelssohn
Dissertations, Theses, and Masters Projects
No abstract provided.
Distribution Of Foraminiferida In An Estuarine Marsh System, Charles Warren Norton
Distribution Of Foraminiferida In An Estuarine Marsh System, Charles Warren Norton
Dissertations, Theses, and Masters Projects
Foraminiferal faunas in marshes and distributary channels of the James River estuary, Virginia, disclose several facies. The channel facies, primarily Ammobaculites crassus, and A. sp. A, typical of estuaries in Chesapeake Bay and other brackish areas are readily distinguishable freom the march facies. Marshes are divisible laterally by changes in the relative proportions of marsh species such as Miliammina fusca, Ammoastuta salsa, and Haplophragmoides hancocki.Changes along the longitudinal estuarine salinity gradient are discernable in both tidal creeks and marsh. Channels exhibit a longitudinal gradient from a freshwater thecamoebinid facies through an upper and mid-estuarine Ammobaculites facies to a higher salinity …
Growth And Condition Of Rangia Cuneata In The James River, Virginia, Richard Knox Peddicord
Growth And Condition Of Rangia Cuneata In The James River, Virginia, Richard Knox Peddicord
Dissertations, Theses, and Masters Projects
This project investigated several aspects of the autecology of the brackish water clam Rangia cuneata in the James River, Virginia. The study, conducted from August, 1970, through March, 1972, was primarily concerned with substrate and salinity effects on growth and condition index of R. cuneata. The studies were conducted in sand and mud substrates in four different salinity regimes. Monthly samples of 15 clams were collected at each of the eight stations for condition index determinations. Condition index was shown to vary seasonally, with a low point in early spring and a maximum in early fall. Values were higher in …
The Comparative Ecology Of Two Species Of Pipefish (Syngnathidae) In The York River, Virginia, Linda P. Mercer
The Comparative Ecology Of Two Species Of Pipefish (Syngnathidae) In The York River, Virginia, Linda P. Mercer
Dissertations, Theses, and Masters Projects
No abstract provided.
Relative Growth, Reproduction And Distribution Of The Rock Crab, Cancer Irroratus, In Chesapeake Bay During The Winter, Roy Tim Terretta
Relative Growth, Reproduction And Distribution Of The Rock Crab, Cancer Irroratus, In Chesapeake Bay During The Winter, Roy Tim Terretta
Dissertations, Theses, and Masters Projects
No abstract provided.
The Effects Of Intrinsic And Environmental Factors On The Oxygen Consumption Of The Blue Crab, Callinectes Sapidus Rathbun, Chae E. Laird
The Effects Of Intrinsic And Environmental Factors On The Oxygen Consumption Of The Blue Crab, Callinectes Sapidus Rathbun, Chae E. Laird
Dissertations, Theses, and Masters Projects
No abstract provided.
Biology Of Seven Species Of Skates (Pisces: Rajidae), John Douglas Mceachran
Biology Of Seven Species Of Skates (Pisces: Rajidae), John Douglas Mceachran
Dissertations, Theses, and Masters Projects
No abstract provided.
Growth Rate And Nesting Aspects For The Glossy Ibis In Virginia, 1972, John William Williams
Growth Rate And Nesting Aspects For The Glossy Ibis In Virginia, 1972, John William Williams
Dissertations, Theses, and Masters Projects
No abstract provided.
The Oxygen Equilibrium Properties Of Hemerythrin In Solution And In Coelomic Cells Of Phascolopsis Gouldi, MarãA London
The Oxygen Equilibrium Properties Of Hemerythrin In Solution And In Coelomic Cells Of Phascolopsis Gouldi, MarãA London
Dissertations, Theses, and Masters Projects
No abstract provided.
Plasma Progesterone Concentrations And Ovarian Histology In Prairie Deermice (Peromyscus Maniculatus Bairdii) From Experimental Laboratory Populations, Barry Douglas Albertson
Plasma Progesterone Concentrations And Ovarian Histology In Prairie Deermice (Peromyscus Maniculatus Bairdii) From Experimental Laboratory Populations, Barry Douglas Albertson
Dissertations, Theses, and Masters Projects
No abstract provided.
A Characterization Of The Corticosterone-Binding-Globulin In The Plasma Of The Duck (Anas Platyrhynchos), James Leon Cheshier
A Characterization Of The Corticosterone-Binding-Globulin In The Plasma Of The Duck (Anas Platyrhynchos), James Leon Cheshier
Dissertations, Theses, and Masters Projects
No abstract provided.
A Numerical And Spatial Study Of The Meadow Vole, Microtus Pennsylvanicus, Margaret Whitney Higgins Bowker
A Numerical And Spatial Study Of The Meadow Vole, Microtus Pennsylvanicus, Margaret Whitney Higgins Bowker
Dissertations, Theses, and Masters Projects
No abstract provided.
Ultrastructure Of Mitosis And Gametogenesis In Cladophora Flexuosa (Dillwyn) Harvey, Kenneth Wilson Bullock
Ultrastructure Of Mitosis And Gametogenesis In Cladophora Flexuosa (Dillwyn) Harvey, Kenneth Wilson Bullock
Dissertations, Theses, and Masters Projects
No abstract provided.
The Vascular Flora Of Fort Eustis, City Of Newport News, Virginia, Phyllis Ann Kline Appler
The Vascular Flora Of Fort Eustis, City Of Newport News, Virginia, Phyllis Ann Kline Appler
Dissertations, Theses, and Masters Projects
No abstract provided.
Optimum Age, Temperature, And Salinity For Estuarine Stocking Of Juvenile Striped Bass, Morone Saxatilis, Walter Steven Otwell
Optimum Age, Temperature, And Salinity For Estuarine Stocking Of Juvenile Striped Bass, Morone Saxatilis, Walter Steven Otwell
Dissertations, Theses, and Masters Projects
A 3n factorial design to evaluate the effects of an abrupt introduction of striped bass, Morone saxatilis from a closed-system rearing facility into a variety of experimental temperature and salinity combinations has demonstrated a considerable hardiness of juvenile fish. Striped bass less than two months old had over 80.0%, survival during seven days subsequent to acute introduction from an average ambient condition of 21.0 ± 3 C at 0.20 to 4.8% into temperatures of 18 C and 24 C and salinities of 4.0% and 12.0%. Relative growth in these treatments was significantly greater than in the 12 C treatment at …
Uptake, Metabolism, And Distribution Of Ddt In Organs Of The Blue Crab, Callinectes Sapidus, Peter F. Sheridan
Uptake, Metabolism, And Distribution Of Ddt In Organs Of The Blue Crab, Callinectes Sapidus, Peter F. Sheridan
Dissertations, Theses, and Masters Projects
Metabolites of DDT were detected in five out of six major organs of blue crabs, Callinectes sapidus, taken from estuarine populations. Residue concentrations were highest in the hepatopancreas and below the limit of detection in the heart. Concentrations in pooled gonad samples (ovaries + testes) depended on the stage of development of the ovaries. Residue levels were low in claw and backfin muscles. Adult blue crabs were exposed for 12 hours to 0.01, 0.1, and 1.0 ppm DDT in water. No significant mortality was recorded. DDT was absorbed through the gills and transported to the hepatopancreas via the hemolymph. Biotransformation …