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- Fisheries Science Peer-Reviewed Articles (4)
- Aquatic Health Sciences Peer-Reviewed Articles (3)
- Hard Clam Seed; Mercenaria Mercenaria; Qpx; Quahog; Disease; Parasite; Hatchery (1)
- Oyster; Crassostrea virginica; oyster parasite; oyster disease; Perkinsus marinus; temperature; salinity (1)
- Population-Dynamics; Cynoscion-Nebulosus; Chesapeake Bay; Growth; Mortality; Waters; Age (1)
Articles 1 - 8 of 8
Full-Text Articles in Aquaculture and Fisheries
The Postlarval Phase Of Bivalve Mollusks: A Review Of Functional Ecology And New Records Of Postlarval Drifting Of Chesapeake Bay Bivalves, P Baker, Roger L. Mann
The Postlarval Phase Of Bivalve Mollusks: A Review Of Functional Ecology And New Records Of Postlarval Drifting Of Chesapeake Bay Bivalves, P Baker, Roger L. Mann
VIMS Articles
Many bivalve mollusks have one or more separate post-metamorphic stages which are functionally distinct from the late juvenile or the adult. The benthic plantigrade and the planktonic postlarva are defined and reviewed here. The plantigrade is a developmentally obligatory stage in mast bivalves. Various anatomical or conchological features, depending on taxa, are intermediate between the veliger and the juvenile. The plantigrade is benthic but highly mobile, via the foot and byssus, relative to the adult, although in some highly mobile bivalves, the plantigrade is functionally similar to the adult. The plantigrade may enter the water column briefly, but not nearly …
Yield-Per-Recruit Analysis And Management Strategies For Atlantic Croaker, Micropogonias Undulatus, In The Middle Atlantic Bight, Luiz R. Barbieri, Mark E. Chittenden, Cynthia M. Jones
Yield-Per-Recruit Analysis And Management Strategies For Atlantic Croaker, Micropogonias Undulatus, In The Middle Atlantic Bight, Luiz R. Barbieri, Mark E. Chittenden, Cynthia M. Jones
VIMS Articles
The effect of different fishing mortality (F) and natural mortality (M), and age at first capture (t(c)) on yield-per-recruit of Atlantic croaker, Micropogonias undulatus, in the lower Chesapeake Bay and North Carolina were evaluated with the Beverton-Holt model. Independent of the level of M (0.20-0.35) or F (0.01-2.0) used in simulations, yield-per-recruit values for Chesapeake Bay were consistently higher at t(c) = 1 and decreased continuously with increases in t(c) (2-5). Although maximum yield per-recruit always occurred at the maximum level off (F=2.0), marginal increases in yield beyond F = 0.50-0.75 were negligible. Current F (F-CUR) is estimated to be …
Evidence That Qpx (Quahog Parasite Unknown) Is Not Present In Hatchery-Produced Hard Clam Seed, Susan E. Ford, Roxanna Smolowitz, Lisa M. Ragone Calvo, Rochelle Barber, John N. Kraueter
Evidence That Qpx (Quahog Parasite Unknown) Is Not Present In Hatchery-Produced Hard Clam Seed, Susan E. Ford, Roxanna Smolowitz, Lisa M. Ragone Calvo, Rochelle Barber, John N. Kraueter
VIMS Articles
A protistan parasite known as QPX (Quahog Parasite Unknown) has been recently associated with disease and mortality of adult hard clams, Mercenaria mercenaria, from Canada to Virginia. There is concern that the organism may be transported in hatchery-reared seed. Tissue sections of 2,203 seed clams (<1-20 mm) from 13 different hatcheries in six states, collected from 1995 to 1997 and examined by pathologists in three laboratories, failed to show QPX or QPX-like organisms. Further, QPX was not detected in a total of 756 hatchery-produced clams examined during their first year of field growout. From this, we conclude that hatchery-produced seed clams are an unlikely source of QPX organisms.
Disease Processes Of The Parasite Perkinsus Marinus In Eastern Oyster Crassostrea Virginica: Minimum Dose For Infection Initiation, And Interaction Of Temperature, Salinity And Infective Cell Dose, Fle Chu, Ak Volety
VIMS Articles
Experiments were conducted to: (1) test the response of oysters to different doses of the oyster parasite Perkinsus marinus and to 2 stages, meronts or prezoosporangia; and (2) investigate the synergistic effects of temperature, salinity and infective cell concentration on P. marinus infection in oysters. A dose-dependent response of P. marinus infection was found in oysters inoculated with 0, 10, 10(2), 10(4), and 10(5) meronts or prezoosporangia per oyster and maintained at 22 to 25 degrees C and 14 to 21 ppt for 8 to 12 wk. The minimum dose required to infect oysters was 10(2) meronts or prezoosporangia per …
Larvae Of Gillellus Jacksoni, G-Uranidea (Dactyloscopidae), Stathmonotus Stahli Tekla, And S-Hemphilli (Chaenopsidae), With Comments On The Use Of Early Life History Characters For Elucidating Relationships Within The Blennioidei, Mr Cavalluzzi
VIMS Articles
Larvae of the families Dactyloscopidae (Gillellus jacksoni, G. uranidea) and Chaenopsidae (Stathmonotus stahli tekla, S. hemphilli) are described from specimens collected in Ambergris Gay, Belize. Larvae are characterized by precocious development of fins and sensory canals, and little pigmentation overall, with the majority of pigmentation occurring ventrally. Pigment distributions in larvae are summarized for the six blennioid families. There are no unifying pigment characters among blennioid larvae. Larvae possess the six shared specialized characters or character complexes (as described in adults) currently used to hypothesize the monophyly of the Blennioidei, and thus, provide no new phylogenetic information.
Introduction To The Proceedings Of The Symposium Fish Larvae And Systematics: Ontogeny And Relationships, Jm Leis, Je Olney, M Okiyama
Introduction To The Proceedings Of The Symposium Fish Larvae And Systematics: Ontogeny And Relationships, Jm Leis, Je Olney, M Okiyama
VIMS Articles
The International Larval Fish Conference was held in Sydney, Australia (26- 30 June 1995) as part of the 19th Annual Meeting of the Early Life History Section of the American Fisheries Society. At the conference, we convened a symposium ("Fish Larvae and Systematics: Ontogeny and Relationships") that was intended to stimulate the application of ontogenetic data to solve problems in fish systematics. The brief we gave the contributors to the symposium was this: "The theme of this symposium will be the use of information gained from egg and larval ontogeny in solving problems in systematics and phylogeny. Thus, we are …
Trends In Research On Crassostrea Virginica And Its Two Protozoan Parasites Perkinsus Marinus And Haplosporidium Nelsoni, Fu-Lin Chu
VIMS Articles
The protozoan parasites, Perkinsus marinus (Dermo) and Haplosporidium nelsoni (MSX), are two important pathogens which have caused severe mortality in the eastern oyster, Crassostrea virginica, in the United States since 1950. This paper reviews and discusses the recent research on the diseases caused by these two parasites and focuses on: I. the in vivo and in vitro interactions between C. virginica and P. marinus, 2. the physiological and biochemical characterization of the parasite, P. marinus, and 3. the development of DNA probes and polymerase chain reaction (PCR) primers specific for H. nelsoni or P. marinus.
Isotopic Compositions Of Lipid Biomarker Compounds In Estuarine Plants And Surface Sediments, Elizabeth A. Canuel, Katherine H. Freeman, Stuart G. Wakeham
Isotopic Compositions Of Lipid Biomarker Compounds In Estuarine Plants And Surface Sediments, Elizabeth A. Canuel, Katherine H. Freeman, Stuart G. Wakeham
VIMS Articles
We examined the isotopic compositions of fatty acids, sterols, and hydrocarbons isolated from three coastal macrophytes (Zostera marina, Spartina alterniflora, and Juncus roemerianus) in order to investigate the relative contribution of these vascular plants as sources of organic matter in coastal sediments such as Cape Lookout Eight, North Carolina. On average, lipid biomarker compounds extracted from the plants were depleted in C-13 by 3-5 parts per thousand relative to delta(13)C total organic carbon (TOC). However, individual compounds within each lipid class varied by up to 5.6 parts per thousand. Trends in the isotopic compositions of lipids were consistent with delta(13)C(TOC); …