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Full-Text Articles in Life Sciences
Isolation And Characterization Of Microalgae Strains For Live Food In Sulawesi, Indonesia, Wa Iba, Michael Rice
Isolation And Characterization Of Microalgae Strains For Live Food In Sulawesi, Indonesia, Wa Iba, Michael Rice
Michael A Rice
Four strains of diatoms were isolated from the waters of Kendari Bay in Southeast Sulawesi, Indonesia, including strains of Melosira moniliformis, Chaetoceros, sp. and a larger species that is likely to be Tetraselmis weissflogii. Isolated strains have exhibited a wide range of salinity tolerances in the 20 to 35 psu range. Strains of isolated phytoplankton were able to reach high densities consistent with strains suitable for use as aquaculture feeds. One strain Kbl-3 attained lipid content of 22.3 percent per gram dry weight at salinity of 35 psu, suggesting that it may be a good feed for shrimp larvae. Most …
Modified Taylor Float System For Culturing Oysters In The Gambia, Michael A. Rice
Modified Taylor Float System For Culturing Oysters In The Gambia, Michael A. Rice
Michael A Rice
This monograph is a report of trials to grow oysters, Crassostrea tulipa, in Taylor Float plastic mesh culture bags in oyster harvesting sites in Gambia, West Africa. Oysters grew well in the gear, but adoption of the gear by local oyster farmers would be difficult due to the relatively high cost of the gear in relation to the value of oysters cultured within. Economic analysis suggested an eight-year investment payback to recover costs of the gear.
The Impacts Of Aquacultured Oysters, Crassostrea Virginica (Gmelin, 1791) On Water Quality And Sedimentation: Results Of A Mesocosm Study, Michael A. Rice
The Impacts Of Aquacultured Oysters, Crassostrea Virginica (Gmelin, 1791) On Water Quality And Sedimentation: Results Of A Mesocosm Study, Michael A. Rice
Michael A Rice
To determine effects of aquacultured oysters Crassostrea virginica (Gmelin, 1791) on the overlying water column, a mesocosm study was performed at the Marine Ecosystem Research Laboratory (MERL) from June to October, 2000. The MERL facility is located adjacent to Narragansett Bay and consists of fourteen 13,000-l mesocosm tanks designed to simulate the Bay environmental conditions. Two hundred oysters (c35 mm valve height; nominally filtering about 55 l/day/individual) were placed into three mesocosms, and three mesocosms were maintained without oysters as controls. Experiments were run with varying rates of water exchange in the tanks ranging from 0% to 100% per day …
Food-Limited Growth And Condition Index In The Eastern Oyster, Crassostrea Virginica (Gmelin, 1791), And The Bay Scallop, Argopecten Irradians Irradians (Lamarck, 1819), Michael A. Rice, Robert B. Rheault Jr.
Food-Limited Growth And Condition Index In The Eastern Oyster, Crassostrea Virginica (Gmelin, 1791), And The Bay Scallop, Argopecten Irradians Irradians (Lamarck, 1819), Michael A. Rice, Robert B. Rheault Jr.
Michael A Rice
The growth response of the eastern oyster, Crassostrea virginica, and the bay scallop, Argopecten irradians irradians, to varying degrees of food limitation was evaluated. Under conditions of low current speed, dense assemblages of shellfish can rapidly deplete ambient food concentrations, resulting in measurable effects on growth and condition index. A flume study demonstrated significant growth and condition index responses to resource competition after reductions as small as 27% in relatively high ambient food concentrations (—4.6 u.g/1 chlorophyll). Growth rates and condition index are linearly correlated with the average chlorophyll ration consumed. A field study demonstrated similar growth responses when the …
Transient Gear Shellfish Aquaculture, Michael A. Rice, Robert B. Rheault Jr
Transient Gear Shellfish Aquaculture, Michael A. Rice, Robert B. Rheault Jr
Michael A Rice
Transient-gear aquaculture is a method of growing shellfish that is designed to minimize multiple-use conflicts in common use public trust waters, and avoiding the need for a conventional fixed aquaculture lease site. A pro-forma economic model of an oyster farm using transient gear in Rhode Island's Narragansett Bay is provided, and the advantages and disadvantages of transient gear aquaculture are discussed.
Experimental Culture And Particle Filtration By Asian Moon Scallops, Amusium Pleuronectes, Michael A. Rice, Robert B. Rheault, Miguel S. Perez, Vicente S. Perez
Experimental Culture And Particle Filtration By Asian Moon Scallops, Amusium Pleuronectes, Michael A. Rice, Robert B. Rheault, Miguel S. Perez, Vicente S. Perez
Michael A Rice
Growth rates were determined for scallops (35-75 mm valve height) held in pocket nets and lantern nets at varying densities. The Ford-Walford linear transformation of the von Bertalanffy growth equation was used to allow quantification of food-limited stunting. Pocket nets allowed for greater growth of scallops than did the lantern nets at all stocking densities. The growth rates of scallops in pocket nets, nevertheless, were well below the growth of scallops in the wild. Clearance rates of Caribbean strains of Isochrysis galbana (C-ISO) and Chaetocerous gracilus (C-Cg) were determined for moon scallops. Amusin pleuronectes, in static chambers at 28ºC. The …
Settlement And Recruitment Of Bay Scallops, Argopecten Irradians (Lamarck 1819), To Artificial Spat Collectors In The Westport River Estuary, Westport, Massachusetts, Karin A. Tammi, Scott J. Soares, Wayne Turner, Michael A. Rice
Settlement And Recruitment Of Bay Scallops, Argopecten Irradians (Lamarck 1819), To Artificial Spat Collectors In The Westport River Estuary, Westport, Massachusetts, Karin A. Tammi, Scott J. Soares, Wayne Turner, Michael A. Rice
Michael A Rice
In January 1993, The Waterworks Group initiated the Bay Scallop Restoration Project as an attempt to restore the once prolific bay scallop within the Westport River Estuary in Massachusetts. This project is a multi-phased endeavor aimed at better understanding recruitment failures of both natural stocks and introduced seed of Argopecten irradians. The main objective of this project is to assesss juvenile recruitment (survival to > 4mm) to artificial spat collectors placed in historically productive scallop beds and within close proximity to adult spawner rafts. Spat collectors (2 to 4mm plastic mesh bags) containing monofilament were suspended on 28 to 35-meter floating …