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VIMS Articles

Recruitment

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Full-Text Articles in Life Sciences

Abundance And Exploitation Rate Of The Blue Crab (Callinectes Sapidus) In Chesapeake Bay, Af Sharov, Jh Volstad, Gr Davis, Bk Davis, Rom Lipcius, Mm Montane Mar 2003

Abundance And Exploitation Rate Of The Blue Crab (Callinectes Sapidus) In Chesapeake Bay, Af Sharov, Jh Volstad, Gr Davis, Bk Davis, Rom Lipcius, Mm Montane

VIMS Articles

We estimated absolute abundance of the blue crab stock in Chesapeake Bay during winter from stratified random surveys conducted baywide from 1990 to 1999, using the swept-area method. We estimated catching efficiency of the survey gear from multiple depletion experiments to correct for temporal and vessel/area differences in catchability. The survey was conducted during the winter, when crabs are dormant and "buried" in the bottom. Analysis of crab carapace width (CW) frequency distributions revealed two size modes: CW less or equal 60 mm and CW greater than 60 mm, corresponding to age-0 (recruits) and age-1+ (one year and older ...


Recruitment And Growth Of Oysters On Shell Planted At Four Monthly Intervals In The Lower Potomac River, Maryland, Reinaldo Morales-Alamo, Roger L. Mann Jan 1990

Recruitment And Growth Of Oysters On Shell Planted At Four Monthly Intervals In The Lower Potomac River, Maryland, Reinaldo Morales-Alamo, Roger L. Mann

VIMS Articles

Oyster shells were planted on four successive months (May to August 1986) in contiguous plots at Jones Shore Bar in the Potomac River, Maryland, to study the effect of differences in time of cultch planting on settlement and survival of oyster spat. The plots were usually sampled at two-week intervals from time of planting through November, 1986, and once in June, 1987. A massive concentration of the tunicate Molgula manhattensis covered the bottom in all plots within four to six or eight weeks following shell planting. A commercially acceptable number of spat per shell, between 1.8 and 2.2 ...


Field Studies Of Bivalve Larvae And Their Recruitment To The Benthos: A Commentary, Roger L. Mann Jan 1988

Field Studies Of Bivalve Larvae And Their Recruitment To The Benthos: A Commentary, Roger L. Mann

VIMS Articles

A list of factors influencing the recruitment of bivalve larvae might include, but not be limited to, the following: egg quality, physical environment, food availability, loss to predation and disease during larval development, interplay of passive dispersal (horizontally) by water currents and depth regulation by active swimming, proximity of suitable and available substratum as metamorphic competency is achieved, and availability of sufficient metabolic reserves to complete metamorphosis to the benthic form. While tractable methods exist to quantify aspects of certain members of the above list, the focus of such work has usually been biased towards laboratory experiments or hatchery production ...