Aquaculture and Fisheries Commons^™

Growth Characteristics Of Newly Isolated Indonesian Microalgae Under Diferent Salinity, Michael A. Rice, Wa Iba, Gary H. Wikfors, Lucie Maranda

Michael A Rice

The Shellfish Corner: Cap And Trade Systems With Shellfish May Be Good For The Economic Bottom Line, Michael A. Rice

Michael A Rice

The Shellfish Corner: How Many Shellfish Can I Grow On My Farm?, Michael A. Rice

Michael A Rice

The Shellfish Corner: Oyster Shells, Cultching, And Oyster Farming, Michael A. Rice

Michael A Rice

The Shellfish Corner: The Luther H. Blount Shellfish Hatchery Of Rhode Island, Michael A. Rice

Michael A Rice

The Shellfish Corner: Aquaculture Of Exotic Shellfish Species, Michael A. Rice

Michael A Rice

The Shellfish Corner -- Water Quality And Culture Of Shellfish In Prohibited Waters, Michael A. Rice

Michael A Rice

The Shellfish Corner: Filter Feeding Bivalves As Processors Of Coastal Waters, Michael Rice

Michael A Rice

Bivalves have a profound role in controlling the boom and bust cycles of seasonal phytoplankton blooms, and the increased rates of sediment deposition to the bottom by bivalves are an important "coupler" between the water column and the bottom that stimulates the rate of decomposition and other processes in the sediments.

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 …

The Role Of Crassostrea Virginica Hemocytes In Shell Formation: Ex Vivo Mineral Deposition By Cultured Hemocytes, Emily A. Untener, Douglas C. Hansen, Karolyn Hansen

Karolyn Hansen

Abstract of Technical Paper Presented at the 103rd Annual Meeting National Shellfisheries Association Baltimore, Maryland March 27–31, 2011

The Mineralization Front Of The Eastern Oyster Is Cellular, Andrew S. Mount, Neeraj V. Gohad, Mary Beth Johnstone, Karolyn Hansen, Douglas C. Hansen

Karolyn Hansen

Abstract of Technical Paper Presented at the 101st Annual Meeting National Shellfisheries Association Savannah, Georgia March 22–26, 2009

Towards Biomimetic Ceramic Coatings: Cellular Aspects Of Oyster Shell Biomineralization, Mary Beth Johnstone, Karolyn Hansen, Neeraj V. Gohad, Douglas C. Hansen, Andrew S. Mount

Karolyn Hansen

Abstract of Technical Paper Presented at the 101st Annual Meeting National Shellfisheries Association Savannah, Georgia March 22–26, 2009

A Tide Prediction And Tide Height Control System For Laboratory Mesocosms, Luke P. Miller, Jeremy D. Long

Luke P. Miller

Experimental mesocosm studies of rocky shore and estuarine intertidal systems may benefit from the application of natural tide cycles to better replicate variation in immersion time, water depth, and attendant fluctuations in abiotic and edaphic conditions. Here we describe a stand-alone microcontroller tide prediction open-source software program, coupled with a mechanical tidal elevation control system, which allows continuous adjustment of aquarium water depths in synchrony with local tide cycles. We used this system to monitor the growth of Spartina foliosa marsh cordgrass and scale insect herbivores at three simulated shore elevations in laboratory mesocosms. Plant growth decreased with increasing shore …

Interactions Between Short-Beaked Common Dolphin (Delphinus Delphis) And The Winter Pelagic Pair-Trawl Fishery Ff Southwest England (Uk), Marijke N. De Boer, James T. Saulino, Mardik F. Leopold, Peter J.H. Reijnders, Mark P. Simmonds

Mark P. Simmonds, OBE

During offshore and onshore studies (2004 to 2009), the interactions between pair-trawls and short-beaked common dolphins (Delphinus delphis) were studied to better understand the impact of bycatch. A ‘hotspot’ area where pair-trawls overlapped with high dolphin abundance was identified. We made comparisons between boat-based data collected in absence and presence of pair-trawlers. The relative abundance and group-size of dolphins was significantly higher in the presence of pair-trawlers. Dolphins were observed associating with towing and hauling procedures. Significantly, more carcasses occurred in areas with hauling-activity than those without. Body-temperatures obtained from carcasses found near operating pair-trawlers indicated that bycatch mostly occurred …

The Shellfish Corner -- Shellfish And The Problem Of Ocean Acidification, Michael A. Rice

Michael A Rice

The acidification of the world's oceans due to increasing atmospheric carbon dioxide concentrations is creating a problem in the dissolution of larval shells of mollusks and creating problems for shellfish hatcheries. Hatcheries can mitigate the problem by treating incoming seawater with alkaline sodium carbonate, but there is evidence that acidic sediments in some locations are a source of considerable post-settlement loss of newly set juveniles.

Microalgae In Eastern Pacific White Shrimp Hatcheries: A Review On Roles And Culture Environments, Wa Iba, Michael A. Rice, Gary H. Wikfors

Michael A Rice

Demand for shrimp, particularly the eastern Pacific white shrimp Litopenaeus vannamei (Boone 1931), will continue to increase in Asian and worldwide seafood markets. Providing shrimp farms with a robust, healthy, and continuous supply of shrimp seed is a challenge that must be addressed to meet the demand. Shrimp feed during hatchery production still relies on live microalgae, despite many years of effort to find suitable full or partial-replacement diet alternatives. Successful mass production of microalgae for hatchery feed to obtain good quality shrimp seedstock depends on a number of environmental factors that determine the growth and nutritional values of various …

Extension Programming In Support Of Public Policy For The Management Of Aquaculture In Common Water Bodies, Michael A. Rice

Michael A Rice

Editor's Note, Catherine Schmitt

Catherine Schmitt

No abstract provided.

The Centennial Of The Smith-Lever Act And Aquaculture Extension, Michael A. Rice

Michael A Rice

Bacterial Community Profiling Of The Eastern Oyster (Crassostrea Virginica): Comparison Of Culture-Dependent And Culture-Independent Outcomes, Kenneth J. La Valley, Steve Jones, Marta Gomez-Chiarri, Joseph Dealteris, Michael A. Rice

Michael A Rice

Tissue-associated bacterial community profiles generated using a nested polymerase chain reaction–denaturing gradient gel electrophoresis (DGGE) approach and culture-dependent and culture-independent isolation techniques were compared. Oyster samples were collected from 2 harvest areas along the coast of Maine, in the United States. Profiles from both isolation strategies were evaluated using Sorensen’s index of similarity and cluster analysis of gel banding patterns. Cultureindependent profiles were further evaluated using the Shannon diversity index. In general, the culture-dependent strategy resulted in a greater number of bands within a profile. BacterialDGGEprofiles were found to be highly similar within an isolation strategy, with a higher degree …

New Record Of Pacific Sierra (Scomberomorus Sierra) With Notes On Previous California Records, Jonathan P. Williams, Daniel J. Pondella Ii, Brent M. Haggin, Larry G. Allen

Daniel Pondella

On 22 October 2006, a Pacific sierra (Scomberomorus sierra) was caught by gillnet near Mother’s Beach, Marina del Rey, Los Angeles County, California (33º58’50"N, 118º27’25"W) during sampling for juvenile white seabass (Atractoscion nobilis). This catch represents the northernmost record of Pacific sierra, and one of several specimens known from California.

Project Limulus: Understanding And Conserving A Critical Natural Resource, Jennifer H. Mattei

Jennifer Mattei

Mattei, fellow SHU associate professor of Biology, Dr. Mark Beekey, and many other devoted biologists and conservationists are deeply committed to studying and preserving Limulus polyphemus – the American horseshoe crab. A concerted effort is now under way to locate, count and tag horseshoe crabs – whose numbers have declined since the early 1990s. The crabs are considered to be both a dominant and a “keystone” species of the intertidal zone. Their greatest value to humankind is that the blood of Limulus has an amazing property: It contains unique blood cells (amebocytes) that are used to test human vaccines for …

Report On Sanitary Shoreline Survey Within The Tanbi Wetlands National Park And Other Shellfish Harvesting Communities, The Gambia

Michael A Rice

Emphasis is placed on the sanitary control of shellfish because of the direct relationship between pollution of shellfish growing areas and the transmission of diseases to humans. Shellfish borne infectious diseases are generally transmitted via a fecal - oral route. To accurately assess waters for shellfish harvesting, an evaluation of the pollution sources that are likely to affect the area is required by the NSSP. The shoreline survey is conducted of the shellfish growing area shoreline and estuary to locate pollution sources that could have an effect on the water quality of the area. The shoreline survey team visited 15 …

Using Gis Mapping Of The Extent Of Nearshore Rocky Reefs To Estimate The Abundance And Reproductive Output Of Important Fishery Species, Jeremy T. Claisse, Daniel J. Pondella Ii, Jonathan P. Williams, James Sadd

Daniel Pondella

Kelp Bass (Paralabrax clathratus) and California Sheephead (Semicossyphus pulcher) are economically and ecologically valuable rocky reef fishes in southern California, making them likely indicator species for evaluating resource management actions. Multiple spatial datasets, aerial and satellite photography, underwater observations and expert judgment were used to produce a comprehensive map of nearshore natural rocky reef habitat for the Santa Monica Bay region (California, USA). It was then used to examine the relative contribution of individual reefs to a regional estimate of abundance and reproductive potential of the focal species. For the reefs surveyed for fishes (i.e. 18 …

Results Of A Preliminary Shoreline Shellfish Sanitary Survey Near Banjul, Gambia Conducted On 18 June 2011, Kanyi Babanding, Michael A. Rice

Michael A Rice

A preliminary shoreline survey was conducted along the Bund Road (frequently referred to as Bond Road) levee and the Banjul-Serrekunda Highway in the northern Tanbi Wetlands oyster harvesting area in the metropolitan Banjul area. In part this was designed as a training exercise for Gambian officials will be assuming responsibility for future shoreline surveys in the Gambia. Key identified areas of concern include the Banjul fish landing area on Bund Road utilized by a number of artisanal fishers; an over-water toilet facility for fishers near the fish landing site; evidence of illegal waste and rubbish dumping along Bund Road; an …

Pioneering Lobster Aquaculture In Rhode Island, Michael Rice

Michael A Rice

No abstract provided.

Pioneering Lobster Aquaculture In Rhode Island, Michael A. Rice

Michael A Rice

Size Selectivity Of Purse Seines In The Southern Philippines Multispecies Tuna Fisheries, Michael A. Rice, Joseph T. Dealteris, Samuel E. Resma

Michael A Rice

The multi-species Philippine tuna purse seine fishery targets three tuna species: skipjack (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares) and bigeye tuna (Thunnus obesus). These are highly migratory pelagic fishes that grow to different maximum lengths and weights. At present there is no mesh size regulation specific to the fishery in the Philippines although tuna purse seines generally use 8.9cm (3.5 in) mesh size in the bunt of the net. An empirical analysis was conducted to compare the catches of purse seine nets with two different mesh sizes in the top portion of the bunt: 8.9cm and 12.7cm. Field measurements of …

An Ecosystem-Based Approach To Management: Using Individual Behaviour To Predict The Indirect Effects Of Antarctic Krill Fisheries On Penguin Foraging, Suzanne H. Alonzo, Paul Switzer, Marc Mangel

Paul V. Switzer

Summary 1. Changes in species' abundance and distributions caused by human disturbances can have indirect effects on other species in a community. Although ecosystem approaches to management are becoming increasingly prevalent, they require a fuller understand- ing of how individual behaviour determines interactions within and between species. 2. Ecological interactions involving krill are of major importance to many species within the Antarctic. Despite extensive knowledge of the ecosystem that they occupy, there is still incomplete understanding of the links between species and the effect of environmental conditions on these interactions. In this study, we extended a behavioural model used previously …

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 …