The Effects of Proliferative Gill Disease on the Blood Physiology of Channel Catfish, Blue Catfish, and Channel Catfish × Blue Catfish Hybrid Fingerlings

Beecham, Rachel V.; Griffin, Matt J.; LaBarre, Susan B.; Wise, David J.; Mauel, Michael J.; Pote, Linda M.; Minchew, C. Douglas

doi:10.1577/a09-034.1

Cited by 12 publications

(8 citation statements)

References 16 publications

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“…The actinospore stage infects catfish gills and causes severe branchial inflammation and epithelial hyperplasia (MacMillan et al ). The lesions increase the distance between water and blood and decrease gill surface area, resulting in oxygen transport and reduced blood pH (Beecham et al ). Other common catfish pathogens such as Flavobacterium columnare may also cause significant physical damage or even destroy gill tissues (Sun et al ).…”

Section: Factors Affecting Oxygen Uptake By Catfishmentioning

confidence: 99%

Dissolved Oxygen and Aeration in Ictalurid Catfish Aquaculture

Boyd

Torrans

Tucker

2017

J World Aquaculture Soc

127

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Feed-based production of ictalurid catfish in ponds is the largest aquaculture sector in the USA. Feed has an oxygen demand, and increases carbon dioxide, ammonia nitrogen, and phosphate inputs to ponds. Major sources of oxygen in ponds are phytoplankton photosynthesis and mechanical aeration; the major sink for oxygen is respiration by fish and by microorganisms in the water column and sediment. Dissolved oxygen concentrations decline when respiration exceeds photosynthesis, and the most crucial time for low dissolved oxygen concentration is at night. Mechanical aeration is applied to avoid nighttime dissolved oxygen concentrations from falling below the critical level for catfish of 3 mg/L. Electrically powered paddlewheel aerators are used by most catfish producers. The oxygen-transfer efficiency of these aerators is known, but calculations of aeration requirement from stocking and feeding rates are not reliable because of variation in phytoplankton abundance and in weather conditions. Dissolved oxygen concentrations must be monitored, and when measurements suggest that nighttime dissolved oxygen concentration will be unacceptably low, tractor-powered emergency aerators must be operated to supplement dedicated aeration. Dissolved oxygen concentration also is important in hatcheries, and small aeration systems have been developed for hatchery application.

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Section: Factors Affecting Oxygen Uptake By Catfishmentioning

confidence: 99%

Dissolved Oxygen and Aeration in Ictalurid Catfish Aquaculture

Boyd

Torrans

Tucker

2017

J World Aquaculture Soc

127

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“…Hybrid catfish have many desirable production characteristics, including improved disease resistance and lower susceptibility to several Channel Catfish pathogens (Wolters et al 1996;Bosworth et al 2003;Beecham et al 2010;Griffin et al 2010a;Arias et al 2012). However, based on this current work, Channel and Blue Catfish and their hybrid appear comparably susceptible to B. damnificus infection.…”

Section: Number Of Cercariae Per Fishmentioning

confidence: 99%

“…Because hybrid catfish production has increased, it is essential that pathogens historically associated with Channel Catfish production are evaluated in hybrid catfish to identify disease risks and develop effective disease management programs. Several pathogens highly detrimental to Channel Catfish production, namely Edwardsiella ictaluri, Flavobacterium columnare, and Henneguya ictaluri, do not induce the same degree of pathology in hybrid and Blue Catfish (Wolters et al 1996;Bosworth et al 2003;Beecham et al 2010;Griffin et al 2010a;Arias et al 2012). Although infection in the hybrid is not as common as it is in Channel Catfish, a review of disease case submissions to the Aquatic Research and Diagnostic Laboratory in Stoneville, Mississippi, shows an increased incidence of B. damnificus infections in hybrid catfish in recent years (http://tcnwac.msstate.edu/publications.htm).…”

mentioning

confidence: 99%

Comparative Susceptibility of Channel Catfish, Blue Catfish, and their Hybrid Cross to Experimental Challenge with Bolbophorus damnificus (Digenea: Bolbophoridae) Cercariae

et al. 2014

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The digenetic trematode Bolbophorus damnificus has been implicated in significant losses in catfish aquaculture since the late 1990s. The complex life cycle sequentially involves the American white pelican Pelecanus erythrorhynchos, the marsh rams horn snail Planorbella trivolvis, and Channel Catfish Ictalurus punctatus. Research supports anecdotal reports from the industry, suggesting that the hybrid of Channel Catfish×Blue Catfish I. furcatus is less susceptible to disease agents that have been historically prohibitive to Channel Catfish production, namely the gram-negative bacteria Edwardsiella ictaluri and Flavobacterium columnare, as well as the myxozoan parasite Henneguya ictaluri. This current research compared the susceptibility of Channel Catfish, Blue Catfish, and their hybrid cross to an experimental challenge by B. damnificus. Fish were exposed to 0, 100, 200, and 400 B. damnificus cercariae per fish, and the numbers of metacercariae per fish were determined 14 d postchallenge. Metacercariae were recovered from all challenged fish. There were no significant differences among fish groups challenged with the same dose, suggesting Channel and Blue Catfish and their hybrid are comparably susceptible to B. damnificus infection. As such, it is recommended that producers raising hybrid catfish remain diligent in controlling populations of the snail intermediate host to prevent production losses attributed to B. damnificus, especially when loafing pelicans have been observed at the aquaculture operation.

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“…Blood and fillet pH decrease due to exposure to high CO 2 and lactate concentrations (Beecham et al, ; Bosworth et al, ; Cameron, ), which causes intracellular acidosis (Portz et al, ). However, in the present study, ultimate fillet pH was higher in the extreme treatment than the moderate treatment despite the extreme treatment's higher CO 2 .…”

Section: Discussionmentioning

confidence: 99%

Effects of acute environmental and handling exposure on physiology and fillet quality of market‐sized Channel Catfish

et al. 2020

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Catfish Ictalurus spp. are subjected to stressful conditions during harvest, which may be linked to fillet coloration and quality. Poor water quality in ponds, socks or hauling tanks, as well as handling stress, have been suggested to cause red fillets in catfish; however, chronic exposure has not resulted in red fillets. Short‐term occurrences of extreme poor water quality, particularly low dissolved oxygen, high carbon dioxide and high temperature, may occur in ponds or during harvest. Therefore, market‐sized Channel Catfish Ictalurus punctatus were acutely exposed (12 hr) to one of the three water quality treatments while confined during a simulated socking procedure and evaluated for stress responses by means of change in blood parameters and fillet quality. In fish subjected to the extreme treatment, hematocrit, plasma cortisol, glucose and lactate levels increased, with 22% mortality, indicating highly stressful conditions. In fish subjected to moderate and typical (control) treatments, cortisol increased but a lack of change or decrease in glucose and lactate indicated minimal anaerobic metabolism. Only one red fillet was produced by the extreme treatment and two by the typical treatment; therefore, the results suggest red fillets are not a product of poor water quality compounded by handling during harvest.

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The Effects of Proliferative Gill Disease on the Blood Physiology of Channel Catfish, Blue Catfish, and Channel Catfish × Blue Catfish Hybrid Fingerlings

Cited by 12 publications

References 16 publications

Dissolved Oxygen and Aeration in Ictalurid Catfish Aquaculture

Dissolved Oxygen and Aeration in Ictalurid Catfish Aquaculture

Comparative Susceptibility of Channel Catfish, Blue Catfish, and their Hybrid Cross to Experimental Challenge with Bolbophorus damnificus (Digenea: Bolbophoridae) Cercariae

Effects of acute environmental and handling exposure on physiology and fillet quality of market‐sized Channel Catfish

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