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Articles 1 - 24 of 24
Full-Text Articles in Life Sciences
Allozyme Analysis Of Billfish Population Structure, Lee W. Morgan
Allozyme Analysis Of Billfish Population Structure, Lee W. Morgan
Dissertations, Theses, and Masters Projects
No abstract provided.
Adaptive Significance Of Ray Florets In Asteraceae, Gail Taber Steele
Adaptive Significance Of Ray Florets In Asteraceae, Gail Taber Steele
Dissertations, Theses, and Masters Projects
No abstract provided.
Survival Of Juvenile Queen Conch, Strombus Gigas, In Natural Habitats: Impact Of Prey, Predator And Habitat Features, Livingston Sinclair Marshall Jr
Survival Of Juvenile Queen Conch, Strombus Gigas, In Natural Habitats: Impact Of Prey, Predator And Habitat Features, Livingston Sinclair Marshall Jr
Dissertations, Theses, and Masters Projects
In this dissertation, I experimentally examine predation-induced mortality upon juvenile queen conch, Strombus gigas, and assess the importance of select habitat predator and conch characteristics affecting predation intensity. Experiments were conducted during the summer and early fall of 1987, 1988, 1990 and 1991 in seagrass beds and adjacent sand flats near Lee Stocking Island, Exuma Cays, Bahamas. These experiments indicate that various factors act interactively to produce habitat-specific mortality rates in queen conch due to predation. These include (1) habitat type, whereby seagrass beds offer some protection; (2) local population dynamics, such that populated seagrass beds appear to enhance conch …
Photosynthetic Responses Of Eelgrass (Zostera Marina L) To Light And Sediment Sulfide In A Shallow Barrier Island Lagoon, Jill Lynn Goodman
Photosynthetic Responses Of Eelgrass (Zostera Marina L) To Light And Sediment Sulfide In A Shallow Barrier Island Lagoon, Jill Lynn Goodman
Dissertations, Theses, and Masters Projects
No abstract provided.
Modelling Of Zinc Accumulation In The American Oyster, Crassostrea Virginica (Gmelin), Cheol Mo
Modelling Of Zinc Accumulation In The American Oyster, Crassostrea Virginica (Gmelin), Cheol Mo
Dissertations, Theses, and Masters Projects
A model of zinc accumulation by the American oyster, Crassostrea virginica, is developed by relating in-situ zinc body burden to time-integration of uptake. Short-term uptake rates are estimated in laboratory by introducing &\sp{lcub}65{rcub}&Zn to oysters of various weights in aquaria with salinities of 18&\perthous& and 12&\perthous&. Uptake of &\sp{lcub}65{rcub}&Zn by an oyster: (1) varies as a power function of the body weight (soft tissue dry weight) of the oyster (&dy\over{lcub}dt{rcub}& = kW&\sp{lcub}\beta{rcub}&), (2) is inversely related to the salinity of ambient water, and (3) increases linearly with ambient concentration. Zinc body burdens of oysters of various weights from oyster beds …
Larvae And Relationships Of Epinepheline Serranids (Teleostei: Percoidei), Carole Christine Baldwin
Larvae And Relationships Of Epinepheline Serranids (Teleostei: Percoidei), Carole Christine Baldwin
Dissertations, Theses, and Masters Projects
Morphology is described for larvae of Diploprion bifasciatus, Belonoperca chabanaudi, Jeboehlkia gladifer, and Grammistes sexlineatus of the serranid subfamily Epinephelinae. Known larvae of all epinephelines are compared. Larval epinephelines differ in patterns of pigmentation, head spination, sequence of fin formation and morphology of elongate (often spectacularly so!) dorsal-fin spines. Relationships among epinepheline genera are investigated based on phylogenetic analysis of larval and adult morphology. Five monophyletic tribes are cladistically delineated, and relationships among tribes and among genera of the tribe Grammistini are hypothesized. Generic composition of tribes differs from Johnson's (1983) classification only in the allocation of Jeboehlkia to the …
Distribution, Abundance, And Behavior Of The Cownose Ray, Rhinoptera Bonasus (Mitchill 1815), In Lower Chesapeake Bay, Robert A. Blaylock
Distribution, Abundance, And Behavior Of The Cownose Ray, Rhinoptera Bonasus (Mitchill 1815), In Lower Chesapeake Bay, Robert A. Blaylock
Dissertations, Theses, and Masters Projects
Aspects of the ecology of the cownose ray, Rhinoptera bonasus, in the lower Chesapeake Bay and its tributaries were studied using aerial surveys, biotelemetry, and examination of stomach contents. The Chesapeake Bay was surveyed by airplane during 1986-1989, to examine the distribution of cownose rays and estimate their abundance using line transect methods. Cownose rays resided in Chesapeake Bay throughout the summer months, entering in early June and emigrating in late September. They were usually absent, or nearly so, by late October. Mean monthly abundance ranged from none present in May and November, to a September average of 9.3 &\cdot& …
Foraging Ecology Of The Blue Crab, Callinectes Sapidus Rathbun, In Lower Chesapeake Bay, Randa A. Mansour
Foraging Ecology Of The Blue Crab, Callinectes Sapidus Rathbun, In Lower Chesapeake Bay, Randa A. Mansour
Dissertations, Theses, and Masters Projects
This study concurrently quantified blue crab feeding habits and preference, and examined the inter-relationships between diet, predator preference, and predator and prey abundance and distribution in three subestuaries of lower Chesapeake Bay--the James, York and Rappahannock Rivers, Virginia. Complementary laboratory investigations estimated the combined effect of the functional, aggregative and interference responses upon prey and predator survival and predator foraging rates for blue crabs and a common bivalve prey, Macoma balthica, in this system. Crab abundance, prey abundance and diet were correlated such that blue crabs aggregated in areas of highest preferred (i.e., bivalve) prey abundance, as determined through electivity …
Comparative Biology And Population Dynamics Of Searobins (Genus Prionotus) With Emphasis On Populations In The Northwestern Gulf Of Mexico, James G. Hoff Jr
Comparative Biology And Population Dynamics Of Searobins (Genus Prionotus) With Emphasis On Populations In The Northwestern Gulf Of Mexico, James G. Hoff Jr
Dissertations, Theses, and Masters Projects
Eight species of Prionotus, collected from 5-100 m in the Gulf of Mexico along a cross-shelf transect off Freeport, Tx during October 1977-August 1981, were studied to determine life history patterns and how they partition resources. Only four species were abundant: P. tribulus, P. paralatus, P. longispinosus, and P. stearnsi. Prionotus spp. mature at 80 mm (P. stearnsi and P. rubio), 85 mm (P. tribulus and P. paralatus), 100 mm (P. ophryas), 105 mm (P. roseus), and 120 mm (P. longispinosus). Sizes at Age 1 were 99-140 mm (P. tribulus), 99-138 mm (P. longispinosus), 98-122 mm (P. paralatus), 75-125 mm …
Generic Identification And Patterns Of External Pigment In Larval Gobies (Pisces: Gobiidae) From The Belize Barrier Reef, Elizabeth D. Maddox
Generic Identification And Patterns Of External Pigment In Larval Gobies (Pisces: Gobiidae) From The Belize Barrier Reef, Elizabeth D. Maddox
Dissertations, Theses, and Masters Projects
No abstract provided.
Role Of Habitat Features And Chemical Cues In Substrate Selection By Blue Crab Megalopae: Evidence From Laboratory Experiments, Bruce Clare Layman
Role Of Habitat Features And Chemical Cues In Substrate Selection By Blue Crab Megalopae: Evidence From Laboratory Experiments, Bruce Clare Layman
Dissertations, Theses, and Masters Projects
No abstract provided.
Measurement Of The Carbon And Nitrogen Densities Of The Marine Heterotrophic Flagellate Paraphysomonas Sp, Yongsik Sin
Measurement Of The Carbon And Nitrogen Densities Of The Marine Heterotrophic Flagellate Paraphysomonas Sp, Yongsik Sin
Dissertations, Theses, and Masters Projects
No abstract provided.
Survival And Abundance Of Juvenile Caribbean Spiny Lobster: Effects Of Shelter Size And Geographic Location, Jonathon Daniel Mintz
Survival And Abundance Of Juvenile Caribbean Spiny Lobster: Effects Of Shelter Size And Geographic Location, Jonathon Daniel Mintz
Dissertations, Theses, and Masters Projects
No abstract provided.
Nesting Substrate Preference And Breeding Of Common Terns (Sterna Hirundo) And Black Skimmers (Rynchops Niger) On The Hampton Roads Bridge-Tunnel, Greg S. Keller
Dissertations, Theses, and Masters Projects
No abstract provided.
Oxygen Consumption And Carbon Dioxide Production In Prairie Deer Mice (Peromyscus Maniculatus Bairdii) Kept In Various Group Densities And Reproductive Conditions, Patricia A. Staubs
Oxygen Consumption And Carbon Dioxide Production In Prairie Deer Mice (Peromyscus Maniculatus Bairdii) Kept In Various Group Densities And Reproductive Conditions, Patricia A. Staubs
Dissertations, Theses, and Masters Projects
No abstract provided.
Cytophotometric Estimation Of Nuclear Dna Content Variation In Ten Species Of Geniculate Coralline Algae (Corallinaceae, Rhodophyta), Jeffrey Craig Bailey
Cytophotometric Estimation Of Nuclear Dna Content Variation In Ten Species Of Geniculate Coralline Algae (Corallinaceae, Rhodophyta), Jeffrey Craig Bailey
Dissertations, Theses, and Masters Projects
No abstract provided.
Comparison Of The Level Of Female Induced Reproductive Inhibition In White-Footed Mice (Peromyscus Leucopus Noveboracensis) From Michigan And Virginia, Timothy Sterling Boyer
Comparison Of The Level Of Female Induced Reproductive Inhibition In White-Footed Mice (Peromyscus Leucopus Noveboracensis) From Michigan And Virginia, Timothy Sterling Boyer
Dissertations, Theses, and Masters Projects
No abstract provided.
Taxonomy Of Larval Blennioidei Of Belize, Central America, Martin Ray Cavalluzzi
Taxonomy Of Larval Blennioidei Of Belize, Central America, Martin Ray Cavalluzzi
Dissertations, Theses, and Masters Projects
No abstract provided.
The Effects Of Gull Predation On The Colony Reproductive Success Of Terns And Skimmers In Virginia, Timothy J. O'Connell
The Effects Of Gull Predation On The Colony Reproductive Success Of Terns And Skimmers In Virginia, Timothy J. O'Connell
Dissertations, Theses, and Masters Projects
No abstract provided.
Humor Appreciation And The Right Hemisphere, Melissa Beth Waller
Humor Appreciation And The Right Hemisphere, Melissa Beth Waller
Dissertations, Theses, and Masters Projects
No abstract provided.
Shoreline Habitat Selection By Bald Eagles (Haliaeetus Leucocephalus) In A Non-Breeding Eagle Concentration-Area On The James River, Virginia, Kennedy H. Clark
Shoreline Habitat Selection By Bald Eagles (Haliaeetus Leucocephalus) In A Non-Breeding Eagle Concentration-Area On The James River, Virginia, Kennedy H. Clark
Dissertations, Theses, and Masters Projects
No abstract provided.
A Vegetational Analysis Of Interdunal Swale Communities Of False Cape State Park, Currituck Spit, Virginia, Heather A. Jones
A Vegetational Analysis Of Interdunal Swale Communities Of False Cape State Park, Currituck Spit, Virginia, Heather A. Jones
Dissertations, Theses, and Masters Projects
No abstract provided.
Environmentally Induced Color Polymorphism In Caterpillars Of Biston Betulavia Lognataria, Robin Stewart Parnell
Environmentally Induced Color Polymorphism In Caterpillars Of Biston Betulavia Lognataria, Robin Stewart Parnell
Dissertations, Theses, and Masters Projects
No abstract provided.
Hardwood Forest In The Coastal Plain Of Virginia East Of The Suffolk Scarp, Penelope Williams Cazier
Hardwood Forest In The Coastal Plain Of Virginia East Of The Suffolk Scarp, Penelope Williams Cazier
Dissertations, Theses, and Masters Projects
No abstract provided.