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Full-Text Articles in Life Sciences
Molecular Insights Into The Population Structures Of Cosmopolitan Marine Fishes, John Graves
Molecular Insights Into The Population Structures Of Cosmopolitan Marine Fishes, John Graves
VIMS Articles
Many marine fishes are cosmopolitan, occurring in continuous (e.g., circumtropical) or discontinuous (e.g., antitropical) distributions. Little is known of the genetic basis of population structure of these species, even though several support extensive fisheries. To develop a database that would facilitate comparison of the population structures among cosmopolitan fishes we consistently included restriction fragment length polymorphism (RFLP) analysis of mitochondrial DNA (mtDNA) as a common approach to our investigations of these species. This article presents a review of those analyses. Considerable intra`specific genetic variation was revealed within all cosmopolitan marine species. Continuously distributed species displayed population structures ranging from a …
Ontogenetic Diet Shifts In Nassau Grouper: Trophic Linkages And Predatory Impact, Db Eggleson, Jj Grover, Rom Lipcius
Ontogenetic Diet Shifts In Nassau Grouper: Trophic Linkages And Predatory Impact, Db Eggleson, Jj Grover, Rom Lipcius
VIMS Articles
Understanding which fauna and flora from seagrass beds serve as primary food for reef-based commuters is critical in defining trophic linkages between shallow-water habitats of tropical oceanic regions. Although numerous studies have documented the relative importance of crustaceans in the diet of reef fishes associated with tropical seagrass meadows, it is unknown if trophic importance corresponds to a significant effect on prey distribution and abundance patterns. We quantified size-specific diet of juvenile Nassau grouper (Epinephelus striatus) inhabiting natural and artificial patch reefs, and manipulated the density of artificial patch reefs (0, 8, and 16 patch reefs per ha) to examine …
Evaluation Of Toxicity Of Oxytetracycline On Growth Of Captive Nurse Sharks, Ginglymostoma Cirratum, James Gelsleichter, Enric Cortes, Charles A. Manire, R. Hueter, John Musick
Evaluation Of Toxicity Of Oxytetracycline On Growth Of Captive Nurse Sharks, Ginglymostoma Cirratum, James Gelsleichter, Enric Cortes, Charles A. Manire, R. Hueter, John Musick
VIMS Articles
No abstract provided.
Oyster Reef Broodstock Enhancement In The Great Wicomico River, Virginia, Melissa Southworth, Roger L. Mann
Oyster Reef Broodstock Enhancement In The Great Wicomico River, Virginia, Melissa Southworth, Roger L. Mann
VIMS Articles
The Great Wicomico River is a small, trap-type estuary on the western shore of the Chesapeake Bay that once supported substantial oyster populations. These populations were essentially eliminated by the combined effects of Tropical Storm Agnes in 1972, and subsequent disease mortalities related to Perkinsus marinus and Haplosporidium nelsoni. Oyster broodstock enhancement was initiated in June 1996 by the construction of a three-dimensional intertidal reef with oyster shell, followed by the "seeding," in December 1996, of that reef with high densities of large oysters from disease-challenged populations in Pocomoke and Tangier Sound. Calculations of estimated fecundity of the reef population …
Blue Crab Resources In Other Countries: Implications For The Us Industry, Michael J. Oesterling
Blue Crab Resources In Other Countries: Implications For The Us Industry, Michael J. Oesterling
VIMS Articles
The blue crab, Callinectes sapidus, supports a major fishery in the United States. In recent years, domestic crab meat processors have been besieged by imports into their traditional national marketplace. The direct substitutability of the meat from other Callinectes species or other portunid crabs for domestically produced product has contributed to this influx. "Blue" crabs occur worldwide. Within the genus Callinectes, there are 14 different species, with distributions on both sides of the Atlantic Ocean and along the Pacific coast of the Americas. Other species of portunid crabs that can be exploited for crab meat production occur throughout tropical regions …
Estimation Of Oyster, Crassostrea Virginica, Standing Stock, Larval Production And Advective Loss In Relation To Observed Recruitment In The James River, Virginia, Roger L. Mann, David A. Evans
Estimation Of Oyster, Crassostrea Virginica, Standing Stock, Larval Production And Advective Loss In Relation To Observed Recruitment In The James River, Virginia, Roger L. Mann, David A. Evans
VIMS Articles
Standing stock and demographic data for oysters, Crassostrea virginica, in the James River, Virginia are used to generate spatial estimates of egg production on a reef-specific basis. Subsequent estimates are made of losses related to density-dependent fertilization, natural mortality in the plankton, advective loss related to estuarine circulation, availability of substrate (both absolute amounts and after occlusion by fouling organisms), limited competency of pediveligers to metamorphose, and post settlement mortality to an age of 4 wk post metamorphosis. Reef-specific egg production is highly variable on a per unit basis within the James. In all reef systems fertilization losses approach two …
Spatiotemporal Variation In Postlarval Recruitment Of The Caribbean Spiny Lobster In The Central Bahamas: Lunar And Seasonal Periodicity, Spatial Coherence, And Wind Forcing, Db Eggleston, Rom Lipcius, Ls Marshall, Sg Ratchford
Spatiotemporal Variation In Postlarval Recruitment Of The Caribbean Spiny Lobster In The Central Bahamas: Lunar And Seasonal Periodicity, Spatial Coherence, And Wind Forcing, Db Eggleston, Rom Lipcius, Ls Marshall, Sg Ratchford
VIMS Articles
A large-scale recruitment study of the Caribbean spiny lobster Panulirus argus in the central Bahamas identified (1) strong spatial coherence in settlement to inshore nursery habitats, (2) temporal variability due in part to stochastic wind forcing, and (3) lunar and seasonal periodicity in settlement. First, we quantified lunar variation in settlement on standardized artificial substrates to determine whether or not intra- and inter-annual variability in recruitment could be adequately described by measuring influx of postlarvae during the first quarter of each new moon, as suggested by previous studies. Next, we compared settlement data obtained from artificial surface substrates to concentrations …
Global Phylogeography Of Mackerels Of The Genus Scomber, Daniel Scoles, Bruce B. Collette, John Graves
Global Phylogeography Of Mackerels Of The Genus Scomber, Daniel Scoles, Bruce B. Collette, John Graves
VIMS Articles
Inter- and intraspecific genetic relationships among and within three species of mackerels of the genus Scomber were investigated by restriction site analysis of the whole mitochondrial (mt) DNA genome and direct sequence analysis of the mitochondrial cytochrome b gene. A total of 15 samples, averaging 19 individuals each, were collected from geographically isolated populations throughout the ranges of S. scombrus (two samples), S, australasicus (five samples), and S. japonicus (eight samples). Restriction site analysis with 12 restriction enzymes revealed substantial genetic variation within each species. Sample haplotype diversities ranged from 0.28 to 0.95, and nucleotide sequence diversities from 0.13% to …