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Full-Text Articles in Life Sciences
Nuclear And Mitochondrial Dna Markers For Specific Identification Of Istiophorid And Xiphiid Billfishes, Jan Mcdowell, John Graves
Nuclear And Mitochondrial Dna Markers For Specific Identification Of Istiophorid And Xiphiid Billfishes, Jan Mcdowell, John Graves
VIMS Articles
Independent molecular markers based on mitochondrial and nuclear DNA were developed to provide positive identification of istiophorid and xiphiid billfishes (marlins, spearfishes, sailfish, and swordfish). Both classes of markers were based on amplification of short segments (
Properties Of The Residuals From Two Tag-Recovery Models, Robert J. Latour, John M. Hoenig, Kenneth H. Pollock
Properties Of The Residuals From Two Tag-Recovery Models, Robert J. Latour, John M. Hoenig, Kenneth H. Pollock
VIMS Articles
No abstract provided.
Distribution Of The Euryhaline Squid Lolliguncula Brevis In Chesapeake Bay: Effects Of Selected Abiotic Factors, Ik Bartol, Roger L. Mann, M Vecchione
Distribution Of The Euryhaline Squid Lolliguncula Brevis In Chesapeake Bay: Effects Of Selected Abiotic Factors, Ik Bartol, Roger L. Mann, M Vecchione
VIMS Articles
The majority of cephalopods are thought to have limitations arising from physiology and locomotion that exclude them from shallow, highly variable, euryhaline environments. The brief squid Lolliguncula brevis may be a notable exception because it tolerates low salinities, withstands a wide range of environmental conditions, and swims readily in shallow water. Little is known about the distribution of L. brevis in Chesapeake Bay, a diverse and highly variable estuary. Therefore, a survey of L. brevis was conducted in the Virginia portion of Chesapeake Bay from 1993 to 1997 using a 9.1 m otter trawl, and the effects of selected factors …
Horizontal And Vertical Movements Of Juvenile Bluefin Tuna (Thunnus Thynnus), In Relation To Oceanographic Conditions Of The Western North Atlantic, Determined With Ultrasonic Telemetry, Richard Brill, Molly Lutcavage, Greg Metzger, Peter Bushnell, Michael D. Arendt, Jon Lucy, Cheryl Watson, David Foley
Horizontal And Vertical Movements Of Juvenile Bluefin Tuna (Thunnus Thynnus), In Relation To Oceanographic Conditions Of The Western North Atlantic, Determined With Ultrasonic Telemetry, Richard Brill, Molly Lutcavage, Greg Metzger, Peter Bushnell, Michael D. Arendt, Jon Lucy, Cheryl Watson, David Foley
VIMS Articles
We employed ultrasonic transmitters to follow (for up to 48 h) the horizontal and vertical movements of five juvenile (6.8-18.7 kg estimated body mass) bluefin tuna (Thunnus thynnus) in the western North Atlantic (off the eastern shore of Virginia). Our objective was to document the fishes' behavior and distribution in relation to oceanographic conditions and thus begin to address issues that currently limit population assessments based on aerial surveys. Estimation of the trends in adult and juvenile Atlantic bluefin tuna abundance by aerial surveys, and other fishery-independent measures, is considered a priority. Juvenile bluefin tuna spent the majority of their …
Hybridization Between Two Serranids, The Coney (Cephalopholis Fulva) And The Creole-Fish (Paranthias Furcifer), At Bermuda, Meredith A. Bostrom, Bruce B. Collette, Brian E. Luckhurst, Kimberly S. Reece, John Graves
Hybridization Between Two Serranids, The Coney (Cephalopholis Fulva) And The Creole-Fish (Paranthias Furcifer), At Bermuda, Meredith A. Bostrom, Bruce B. Collette, Brian E. Luckhurst, Kimberly S. Reece, John Graves
VIMS Articles
Intergeneric hybridization between the epinepheline serranids Cephalopholis fulva and Paranthias furcifer in waters off Bermuda was investigated by using morphological and molecular characters. Putative hybrids, as well as members of each presumed parent species, were analyzed for 44 morphological characters and screened for genetic variation at 16 nuclear allozyme loci, two nuclear WDNA loci, and three mitochondrial (mt)DNA gene regions. Four of 16 allozyme loci, creatine kinase (CK-B*), fumarase (FH*), isocitrate dehydrogenase (ICDH-S*), and lactate dehydrogenase (LDH-B*), were unique in C. fulva and R furcifer. Restriction fragments of two nuclear DNA intron regions, an actin gene intron and the second …
Factors Affecting Sperm Motility Of Tetraploid Pacific Oysters, Qx Dong, B Eudeline, Standish K. Allen Jr., Tr Tiersch
Factors Affecting Sperm Motility Of Tetraploid Pacific Oysters, Qx Dong, B Eudeline, Standish K. Allen Jr., Tr Tiersch
VIMS Articles
Factors such as osmotic pressure, extender solution, addition of caffeine, and pH have been shown to affect sperm motility in aquatic species. We evaluated the effects of 18 osmotic pressures, two extender solutions, seven caffeine concentrations, and a pH range of 3 to 14 on motility of sperm from tetraploid Pacific oysters, Crassostrea gigas. Motility was highest at 1000 mOsmol/kg (mean +/- SD: 83 +/- 14%). Calcium-free Hanks' balanced salt solution yielded significantly higher sperm motility than did artificial seawater. Sperm motility increased with caffeine concentrations to 20 mM (81 +/- 12%) and decreased when concentrations were higher than 50 …
Rapa Whelk Rapana Venosa (Valenciennes, 1846) Predation Rates On Hard Clams Mercenaria Mercenaria (Linnaeus, 1758), D Savini, Jm Harding, Roger L. Mann
Rapa Whelk Rapana Venosa (Valenciennes, 1846) Predation Rates On Hard Clams Mercenaria Mercenaria (Linnaeus, 1758), D Savini, Jm Harding, Roger L. Mann
VIMS Articles
The recent discovery of adult veined rapa whelks Rapana venosa (Valenciennes, 1846) in the Lower Chesapeake Bay, U.S.A. offers cause for both ecological and economic concern. Adult rapa whelks are large predatory gastropods that consume bivalves including commercially valuable species such as hard clams, Mercenaria mercenaria (Linnaeus, 1758). Laboratory feeding experiments were used to estimate daily consumption rates of two sizes of whelks feeding on two size classes of hard clams. Large rapa whelks (shell length, SL > 101 mm) are capable of consuming up to 2.7 g wet weight of clam tissue daily, equivalent to 0.8% of their body weight. …
Age And Growth Of The Smooth Dogfish (Mustelus Canis) In The Northwest Atlantic Ocean, Christina L. Conrath, J Gelsleichter, John A. Musick
Age And Growth Of The Smooth Dogfish (Mustelus Canis) In The Northwest Atlantic Ocean, Christina L. Conrath, J Gelsleichter, John A. Musick
VIMS Articles
The northwest Atlantic population of smooth dogfish (Mustelus canis) ranges from Cape Cod, Massachusetts, to South Carolina. Although M. canis is seasonally abundant in this region, very little is known about important aspects of its biology, such as growth and reproductive rates. In the early 1990s, commercial fishery landings of smooth dogfish dramatically increased on the east coast of the United States. This study investigated growth rates of the east coast M. canis population through analysis of growth patterns in vertebral centra. Marginal increment analysis, estimates of precision, and patterns in seasonal growth supported the use of vertebrae to age …
Spawning Of American Shad (Alosa Sapidissima) And Striped Bass (Morone Saxatilis) In The Mattaponi And Pamunkey Rivers, Virginia, Donna M. Bilkovic, John E. Olney, Carl H. Hershner
Spawning Of American Shad (Alosa Sapidissima) And Striped Bass (Morone Saxatilis) In The Mattaponi And Pamunkey Rivers, Virginia, Donna M. Bilkovic, John E. Olney, Carl H. Hershner
VIMS Articles
No abstract provided.
Concurrent Decline Of The Spawning Stock, Recruitment, Larval Abundance, And Size Of The Blue Crab Callinectes Sapidus In Chesapeake Bay, Rom Lipcius, Wt Stockhausen
Concurrent Decline Of The Spawning Stock, Recruitment, Larval Abundance, And Size Of The Blue Crab Callinectes Sapidus In Chesapeake Bay, Rom Lipcius, Wt Stockhausen
VIMS Articles
Conservation of exploited marine populations requires knowledge of interannual variation in the characteristics of and relationships between the spawning stock and recruitment, which determine Population resilience and persistence. We examined relationships between spawning stock abundance, postlarval recruitment, larval abundance, and female size of the blue crab in Chesapeake Bay, both within the Spawning grounds over a 13 yr interval (1988 to 2000) and within lower-bay tributaries over 20 yr (1979 to 1998). Our findings establish that there has been a concurrent, persistent and substantial reduction in the spawning stock, recruitment, larval abundance, and female size, Specifically, in 1992 to 2000: …
Temporal And Geographic Occurrences Of Cetacean Strandings And Manatee Sightings In Virginia, With Notes On Adverse Human-Cetacean Interactions, From 1983-1989, Lee W. Morgan, John A. Musick, Charles W. Potter
Temporal And Geographic Occurrences Of Cetacean Strandings And Manatee Sightings In Virginia, With Notes On Adverse Human-Cetacean Interactions, From 1983-1989, Lee W. Morgan, John A. Musick, Charles W. Potter
VIMS Articles
From 1 January 1983 to 31 December 1989, 416 cetacean strandings consisting of five families and 15 species, and five manatee sightings were recorded in Virginia waters. Most records were of bottlenose dolphins, Tursiops truncatus (339, 1.3%). Most cetacean strandings were reported from Virginia Beach (230, 55.1 % ). The highest number of strandings occurred in 1987 (265, 63.5%) when an epizootic killed many Tursiops. There were five confirmed sightings of manatees in Virginia waters during the study period. Thirty-four stranded cetaceans showed signs of adverse interactions related to human activities.
An Evaluation Of Pop-Up Satellite Tags For Estimating Postrelease Survival Of Blue Marlin (Makaira Nigricans) From A Recreational Fishery, John Graves, Brian E. Luckhurst, Eric D. Prince
An Evaluation Of Pop-Up Satellite Tags For Estimating Postrelease Survival Of Blue Marlin (Makaira Nigricans) From A Recreational Fishery, John Graves, Brian E. Luckhurst, Eric D. Prince
VIMS Articles
No abstract provided.