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Showing 1 to 20 of 32 for “"hatcheries"”.
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Salmon & Steelhead Hatcheries: Conservation or Condemnation?
… problem, early managers chose a band-aid: salmon hatcheries. It now appears that band-aid may have worsened the affliction. There are now nearly 250 salmon hatchery facilities on the West Coast producing hundreds of millions of juvenile fish every year. A debate over the efficiency and wisdom of …
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Salmon & Steelhead Hatcheries: Conservation or Condemnation?
… problem, early managers chose a band-aid: salmon hatcheries. It now appears that band-aid may have worsened the affliction. There are now nearly 250 salmon hatchery facilities on the West Coast producing hundreds of millions of juvenile fish every year. A debate over the efficiency and wisdom of …
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Developing a synthetic organophosphorus-based disinfectant for Canadian chicken hatcheries
The spread of bacterial pathogens within chicken hatcheries is a growing concern. Enterococcus cecorum is a bacterium that causes infection of the chicken respiratory system and in some cases the spine, often requiring farmers to cull a portion of their flocks. Disinfectants used in hatcheries are …
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Isolation of Bacterial pathogens from dead- in- shell Chicken embryos from local Hatcheries
Commercial hatcheries in Zambia have been experiencing losses due to dead-in-shell embryos for quite sometime. Numerous Salmonella serotypes have been frequently recorded in poultry population in Zambia, but no information is available on bacterial association with dead-in-shell mortality in …
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Isolation of Bacterial pathogens from dead- in- shell Chicken embryos from local Hatcheries
Commercial hatcheries in Zambia have been experiencing losses due to dead-in-shell embryos for quite sometime. Numerous Salmonella serotypes have been frequently recorded in poultry population in Zambia, but no information is available on bacterial association with dead-in-shell mortality in …
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The Penaeus monodon baculovirus (MBV): Its epizootiology, prevention and control in penaeid shrimp hatcheries and grow-out ponds in the Philippines.
The prevalence of Penaeus monodon baculovirus (MBV) in black tiger prawn (Penaeus monodon Fabricus) was investigated based on 372 diagnostic cases examined from October 1989, to December, 1990. Laboratory transmission of MBV to the different life stages of P. monodon and tolerance of MBV in …
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The presence of amphibian ranavirus in Virginia warm water fish hatchery ponds
… agents in these declines. Fish stocking from hatcheries provides a unique opportunity for organisms, including infectious diseases, to travel over long distances. Ranavirus was previously found in two ponds at Harrison Lake National Fish Hatchery in Charles City County, Virginia. Therefore, …
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Land Use Impacts of Plastic Mulch Tomato Production and Evaluation of Sorbent Control on Shellfish Hatchery Operations
During the 1990s, shellfish hatcheries operating on the Eastern Shore of Virginia noticed an increase in mortalities of their clam larvae; it was suspected that this was a result of the deteriorating quality of the estuarine water used by aquaculture hatcheries. Many hatcheries obtain their …
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The stress of moving out : physiological and behavioural effects of commercial transport on Atlantic salmon (Salmo salar) smolts
… of fish originating from two different hatcheries were sampled; one was a land-based tank hatchery that required a 30-min drive to the dock, and the other a lake net pen facility that was 90 min to the dock. Analysis of plasma constituents supported previous studies that recovery from …
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High-throughput sperm cryopreservation of aquatic species
… this protocol were evaluated in commercial-scale hatcheries in cooperation with aquaculture producers. To develop production for commercial requirements, quality characteristics of materials and products were identified and recorded during processing and analyzed using industrial engineering …
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Techniques of RNA Isolation and Characterization in Infectious Pancreatic Necrosis Virus-Infected Chinook Salmon Embryo Cells
… economically devastating viral disease for fish hatcheries. This prototype naked, double-stranded RNA virus of the Birnaviradae family was studied to test new techniques for isolation and characterization of its ambiguous early post-infection viral RNA products. RNA was extracted by either the …
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Flatworm Predation on Juvenile Freshwater Mussels
… feeds on juvenile freshwater mussels in fish hatcheries and mussel culture facilities. Laboratory experiments were performed to assess the predation rate of M. tuba on newly transformed juveniles of plain pocketbook mussel, Lampsilis cardium. Predation rate at 20°C in dishes without substrate …
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Performance characterization of Erwin, Shasta, and Kamloops strains of rainbow trout under culture conditions at White Sulphur Springs National Fish Hatchery, West Virginia
… MT, and two Arizona Game and Fish Department hatcheries. Prespawning survival rates were higher for Erwin (90%) and Shasta (95%) strains than for the Kamloops strain (<75%). The Shasta strain exhibited the lowest feed conversion ratio (mean=1.89) and feed costs ($0.15 per stockable individual …
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Effects of temperature and density on the facial malformation of hatchery-reared cisco, Coregonus artedi
… speciation within the Great Lakes cisco clade. Hatcheries are trying to supplement cisco due to population declines. However, hatchery-reared cisco develop flat, subterminal snouts in hatchery environments instead of the pointed, terminal mouth observed in the wild. The cause and onset of the …
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GROWTH PATTERNS AND SIZE-GROUP INTERACTIONS IN HATCHERY-REARED AGE-0 LAKE STURGEON
… lake sturgeon (<em>Acipenser fulvescens</em>) in hatcheries is an important tool for rehabilitation and conservation, but is expensive. When hatchery sturgeon do not grow large enough before stocking, their odds of survival decline significantly and resources are wasted. We investigated the …
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Examining striped bass (Morone saxatilis) predation on hatchery raised Chinook salmon (Oncorhynchus tshawytscha) using dual frequency identification sonar
<p>Since 1995, California State Fish Hatcheries (Feather River, Nimbus, and Mokelumne) and Coleman National Fish Hatchery have raised approximately 29 million 4 fall run Central Valley Chinook salmon (Oncorhynchus tshawytscha) per season for stock enhancement. From April through June, fish are …
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Impacts of sedimentation on early-life phenotypes and gene expression in coho salmon (Oncorhynchus kisutch)
… beneficial for salmonids artificially reared in hatcheries.
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Growth and development of larval bay scallops (Argopecten irradians) in response to early exposure to high CO2
… favorable, resulting in larger veliger larvae. Hatcheries could invest minimal resources to monitor and modify water chemistry only during the first day of development to ensure larva are exposed to favorable conditions during that critical period.
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Growth and development of larval bay scallops (Argopecten irradians) in response to early exposure to high CO₂
… favorable, resulting in larger veliger larvae. Hatcheries could invest minimal resources to monitor and modify water chemistry only during the first day of development to ensure larva are exposed to favorable conditions during that critical period.
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Study the effect of eggs incubation parameter through development of new experimental rig for IKTA quails species
… in different percentages of hatching between hatcheries. This study aims to investigate the effect of increasing incubation temperature, eggs movement type, and incubation time through a set of experimental rigs developed specifically to suit the experimental needs to determine the best eggs …
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