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Full-Text Articles in Aquaculture and Fisheries
Population Dynamics And Habitat Partitioning By Size, Sex, And Molt Stage Of Blue Crabs Callinectes Sapidus In A Subestuary Of Central Chesapeake Bay, Anson H. Hines, Romauld N. Lipcius, A. Mark Haddon
Population Dynamics And Habitat Partitioning By Size, Sex, And Molt Stage Of Blue Crabs Callinectes Sapidus In A Subestuary Of Central Chesapeake Bay, Anson H. Hines, Romauld N. Lipcius, A. Mark Haddon
VIMS Articles
Abundances, size-frequency distributions, sexual composition and molt-stage composition of blue crabs Callinectes sapjdus were measured during 1983 to 1985 in the Rhode River, a subestuary of central Chesapeake Bay, USA. Crabs at the mouth and head of the river basin were sampled with monthly triplicate otter trawls. Crabs in the principal tidal creek of the river were sampled 3 d a week with a fish weir, which caught crabs moving upstream and downstream separately. Crabs exhibited consistent, marked seasonal cycles in abundance as well as considerable annual variation in July peak abundances. New recruits entered the subestuary in late fall …
A Comparison Of The Age And Growth Of The Tiger Shark, Galeocerdo-Cuvieri, From Off Virginia And From The Northwestern Gulf-Of-Mexico, Steve Branstetter, John A. Musick, James A. Colvocoresses
A Comparison Of The Age And Growth Of The Tiger Shark, Galeocerdo-Cuvieri, From Off Virginia And From The Northwestern Gulf-Of-Mexico, Steve Branstetter, John A. Musick, James A. Colvocoresses
VIMS Articles
Lengths at age and growth rates for the tiger shark, Galeocerdo cuvieri. in the northwestern Atlantic and Gulf of Mexico were estimated from bands formed seasonally in the vertebral centra. The tiger shark grows rapidly compared with many other shark species. Growth rates for Gulf of Mexico juveniles were faster than for Atlantic juveniles. This produced significantly different (P < 0.01) estimates of the parameters of von Bertalanffy curves for the two regional samples. With sexes combined, parameter estimates for the Gulf of Mexico sample were L"" = 388 cm TL. K "" 0.184. to = -1.13 years; for the Atlantic sample they were L"" = 440 cm TL, K = 0.107, to = -2.35 years. Males mature at approximately 310 cm TL, females at 315-320 cm TL, but the regional differences in juvenile growth rates result in different ages at maturity. In the Gulf of Mexico. males mature in 7 years. females in 8 years; in the Atlantic. males and females both mature in approximately 10 years. The largest male and female examined (381 cm TL) were 15 and 16 years of age.
Bridging The Gap Between Economic-Theory And Fisheries Management - Can The Mfcma Produce Economically Rational Management - Discussion, James E. Kirkley
Bridging The Gap Between Economic-Theory And Fisheries Management - Can The Mfcma Produce Economically Rational Management - Discussion, James E. Kirkley
VIMS Articles
No abstract provided.
Effect Of Air-Supersaturated Sea Water On Argopecten Irradians Concentricus (Say) And Crassostrea Virginica (Gmelin), Robert Bisker, Michael Castagna
Effect Of Air-Supersaturated Sea Water On Argopecten Irradians Concentricus (Say) And Crassostrea Virginica (Gmelin), Robert Bisker, Michael Castagna
VIMS Articles
Argopecten irradians concentricus and Crassostrea virginica were exposed to several different levels of supersaturated seawater at temperatures ranging from 10 to 2!°C. Gas bubble trauma occurred at a total gas saturation level of 116%, causing mortality in juvenile A. i. concentricus and reduced growth in juvenile C. virginica.
Comparative Attachment, Growth And Mortalities Of Oyster (Crassostrea Virginica) Spat On Slate And Oyster Shell In The James River, Virginia, D. S. Haven, J. M. Zeigler, J. T. Dealteris, J. P. Whitcomb
Comparative Attachment, Growth And Mortalities Of Oyster (Crassostrea Virginica) Spat On Slate And Oyster Shell In The James River, Virginia, D. S. Haven, J. M. Zeigler, J. T. Dealteris, J. P. Whitcomb
VIMS Articles
Slate was investigated as a substitute for oyster shells which are used as a substrate for oyster spat (Crassostrea virginica) settlement in James River, Virginia oyster repletion programs. Oyster shells and slate fragments were planted on adjacent plots in two submerged locations about 825 m apart in July 1984. Quantitative .093 m2 (one ft2) samples were collected by a diver on seven occasions through July 1985, with additional samples collected from teh natural oyster bottoms adjacent to the two areas. Percent mortality, growth and numbers of live spat and spat scars (dead spat) per unit area of bottom were determined. …
Feeding Habitats Of Spot, Leiostomus-Xanthurus, In Polyhaline Versus Meso-Oligohaline Tidal Creeks And Shoals, Steven P. O'Neil, Michael P. Weinstein
Feeding Habitats Of Spot, Leiostomus-Xanthurus, In Polyhaline Versus Meso-Oligohaline Tidal Creeks And Shoals, Steven P. O'Neil, Michael P. Weinstein
VIMS Articles
No abstract provided.
The Physiography And Extent Of Public Oyster Grounds In Pocomoke Sound, Virginia., James P. Whitcomb, Dexter S. Haven
The Physiography And Extent Of Public Oyster Grounds In Pocomoke Sound, Virginia., James P. Whitcomb, Dexter S. Haven
VIMS Articles
Public oyster grounds in Pocomoke Sound, Virginia, were charted in 1978 using an electronic positioning system to locate areas ~f oysters, shell, sand or mud. Over five thousand stations were occupied and 1,267 samples of the substrate were taken with hydraulically operated patent tongs. The information was used to draw large scale charts showing shorelines, depths, bottom types and out lines of public grounds. Substrates, elevations, slopes, oyster densities and spatfall levels were analyzed.