Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Management Strategies ◽  
Missouri River ◽  
The United States ◽  
Common Species ◽  
Main Stem ◽  
Commercial Fishing ◽  
Commercial Species ◽  
Fish Harvest

Abstract.—Channel catfish <em>Ictalurus punctatus</em> are an important recreational and commercial species in much of the United States. Catfish species accounted for a large portion of angler harvest in the years prior to, and immediately after, main-stem reservoir construction on the Missouri River. Since impoundment, fish communities and angler preferences have shifted. Although channel catfish have remained abundant and are among the most common species in population surveys, they are no longer heavily targeted by anglers. We compared channel catfish population metrics, management, and angler creel surveys among the six main-stem Missouri River reservoirs in order to better understand and promote these fisheries. Proportional size distributions ranged from 35 to 79, and relative weights ranged from 84 to 93 among reservoirs in 2009. Channel catfish mean lengths at age were highest in Gavins Point, the lowermost reservoir, and tended to decrease upstream. Estimates of total annual mortality from catch-curve analysis ranged from 12% to 25%. Several reservoirs had a channel catfish population consisting of fish with all year-classes present through age 20, suggesting low exploitation, and one channel catfish from Garrison Reservoir was estimated to be age 28. Gavins Point and Fort Peck are the only reservoirs regulated with harvest limits and bans on commercial fishing. Percentage of interviewed anglers specifically targeting channel catfish ranged from less than 1.0% to 9.5% among reservoirs, and catfish accounted for less than 3.0% of overall estimated fish harvest for all reservoirs combined. These reservoirs could support significant increases in channel catfish harvest. Additional research and creative management strategies are needed to better promote these underutilized fisheries.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Sampling Technique ◽  
Missouri River ◽  
Minimum Length ◽  
Commercial Fishing ◽  
Blue Catfish ◽  
Public And Private ◽  
Flathead Catfish ◽  
Sport Fish

<em>Abstract</em>.—Catfish have provided sustenance for Missouri inhabitants since prehistoric times, and their abundance and large size capabilities contribute to a popular sport fishery. Catfish were first propagated in state fish hatcheries and stocked in public and private waters in 1911. The Missouri Department of Conservation (MDC) began intensive rearing of channel catfish <em>Ictalurus punctatus</em> in 1938. Since 1942, fingerling channel catfish have been used in MDC’s private impoundment stocking program. In the early 1960s, MDC initiated production of advanced fingerling channel catfish (>20.3 cm) for stocking in small public lakes. Catchable-size channel catfish (>30.5 cm) are provided for kids’fishing clinics and the urban fishing program where angler effort is as high as 30,000 h/ha. Blue catfish <em>I. furcatus</em> and flathead catfish <em>Pylodictis olivaris</em> were first reared for stocking in public impoundments in 1978 and 1983, respectively. Commercial markets currently exist for channel catfish, flathead catfish, and blue catfish harvested from the Mississippi and St. Francis rivers. Catfish have comprised 21% of the commercial fish harvest since commercial fishing reports became a requirement in 1945. Channel catfish aquaculture has been a viable commercial industry in Missouri since the 1950s. The first official state sportfishing regulation established for catfish was a seasonal restriction in 1928 followed by a 30.5-cm minimum length limit for channel catfish in 1933. Separate daily sport fish bag limits are in effect for flathead catfish, blue catfish, and channel catfish. Currently, catfish are the most preferred sport fish group in Missouri. Most (75%) catfish anglers prefer to fish for channel catfish, most are harvest-oriented, and more than 80% prefer to fish with rod and reel. Competitive fishing for catfish began in the early 1980s, with most tournaments held on the Missouri and Mississippi rivers and associated lower tributary streams. Major management achievements include banning commercial catfishing on the Missouri River and developing an effective sampling technique for monitoring channel catfish populations in small public lakes. Current fisheries management efforts are directed by a statewide plan and primarily focused on measuring exploitation, growth, movement, and fecundity of blue catfish and flathead catfish in the Missouri River, upper Mississippi River, and associated tributaries, and growth and exploitation of blue catfish and flathead catfish in two large reservoirs.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
United States ◽  
Body Condition ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Aeromonas Hydrophila ◽  
Condition Index ◽  
The United States ◽  
Southern United States ◽  
Conservation Ecology ◽  
Columnaris Disease

<em>Abstract</em>.—U.S. Game and Fish agencies and farm-pond owners throughout the United States use commercially produced channel catfish <em>Ictalurus punctatus </em>fingerlings transported from the southern United States for supplemental stocking. We conducted six trials to examine whether pathogen load, body condition, and select environmental factors influence fingerling survival following transport and cage stocking. Fingerlings were sampled prior to stocking and weekly for the following 3 weeks. Weights and lengths were measured, and a relative condition index was used to quantify body condition. Skin scrapings and gill clippings were examined microscopically for pathogens, and posterior kidney was assayed for <em>Aeromonas hydrophila</em>. Mortality was either less than 10% (four trials) or catastrophic (two trials). A Columnaris disease epizootic was associated with ~50% mortality in one trial, and a red sore disease epizootic was associated with ~80% mortality in another. Body condition or other pathogens, present initially or acquired in study ponds, were not associated with high mortality. The first week appears to be critical for the survival of channel catfish fingerlings following transport.

scholarly journals Analysing Habitat Connectivity and Home Ranges of Bigmouth Buffalo and Channel Catfish Using a Large-Scale Acoustic Receiver Network

2019 ◽  
Vol 11 (11) ◽  
pp. 3051 ◽  
Author(s):  
Eva C. Enders ◽  
Colin Charles ◽  
Douglas A. Watkinson ◽  
Colin Kovachik ◽  
Douglas R. Leroux ◽  
...  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Large Scale ◽  
River System ◽  
The United States ◽  
Fish Passage ◽  
Biological Knowledge ◽  
Home Ranges ◽  
Fish Movement ◽  
Lake Winnipeg

The determination if fish movement of potadromous species is impeded in a river system is often difficult, particularly when timing and extent of movements are unknown. Furthermore, evaluating river connectivity poses additional challenges. Here, we used large-scale, long-term fish movement to study and identify anthropogenic barriers to movements in the Lake Winnipeg basin including the Red, Winnipeg, and Assiniboine rivers. In the frame of the project, 80 Bigmouth Buffalo (Ictiobus cyprinellus) and 161 Channel Catfish (Ictalurus punctatus) were tagged with acoustic transmitters. Individual fish were detected with an acoustic telemetry network. Movements were subsequently analyzed using a continuous-time Markov model (CTMM). The study demonstrated large home ranges in the Lake Winnipeg basin and evidence of frequent transborder movements between Canada and the United States. The study also highlighted successful downstream fish passage at some barriers, whereas some barriers limited or completely blocked upstream movement. This biological knowledge on fish movements in the Lake Winnipeg basin highlights the need for fish passage solutions at different obstructions.

scholarly journals First record of the exotic channel catfish Ictalurus punctatus (Rafinesque 1818) (Siluriformes: Ictaluridae) in the Rio dos Sinos basin, RS, Brazil

2012 ◽  
Vol 12 (3) ◽  
pp. 64-67 ◽  
Author(s):  
Sabrina Spindler da Cruz ◽  
Mateus Evangelista Leal ◽  
Pablo César Lehmann Albornoz ◽  
Uwe Horst Schulz
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Native Species ◽  
First Record ◽  
The United States ◽  
Female Adult ◽  
Aquatic Biodiversity ◽  
North East ◽  
America South ◽  
Aquaculture Facilities

The introduction of non-native species in inland waters is one of the main threats for aquatic biodiversity. Introduced species may compete for resources, prey on native fauna, spread diseases and parasites. The channel catfish Ictalurus punctatus (Siluriformes, Ictaluridae) was first described by Rafinesque 1818 in the United States and is widely distributed in North America, south Canada and north-east Mexico. This species adapts easily to new environmental conditions, is tolerant to different habitats, and is grown easily in aquaculture, which turns it into a potential invader of natural aquatic environments. The introduction of I. punctatus occurs in Brazil since 1980, and this is the first record of its occurrence in the Rio dos Sinos basin, Brazil. A female adult catfish was captured during a survey in the main channel of the Rio dos Sinos (29º 44' 14.04" S and 51º 05' 11.08" W). Most probably the captured individual is an escapee from nearby aquaculture facilities.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Size Structure ◽  
Management Strategies ◽  
Growth Increment ◽  
Stocking Rate ◽  
Lake Productivity ◽  
Growth Increments ◽  
The Many ◽  
Stocking Rates

<em>Abstract</em>.—Large fingerling (>175 mm total length) channel catfish<em> Ictalurus punctatus </em>are usually stocked to maintain put-grow-take channel catfish fisheries in small lakes and impoundments. Because these stockings are costly, stocking the appropriate number of fish is essential in minimizing costs and creating a desirable fishery. Appropriate stocking rates may vary among lakes due to differences in lake productivity, fishing and natural mortality of channel catfish, and other factors. Growth rate is responsive to the many processes that exist in lakes and is commonly density-dependent, making it a desirable parameter for assessing stocking rates. Two growth-increment indices were developed that compared size-specific growth increments within a population to statewide growth-increment percentiles for Missouri. These indices were used to determine responses in channel catfish growth rates in seven lakes where stocking rates had been either substantially reduced or increased. Sampling channel catfish populations after 3 years under the new stocking rate showed that growth increments and size structure did not substantially change. Both indices were correlated with growth increments and provided a way to assess growth relative to other populations. The lack of response of channel catfish populations to the new stocking rates suggests that these populations will not quickly respond to changes in stocking rate. The growth increment indices should assist managers in determining appropriate stocking rates and other management strategies.

scholarly journals Kentucky bluegrass (Poa pratensis) Invasion in the Northern Great Plains: A Story of Rapid Dominance in an Endangered Ecosystem

2015 ◽  
Vol 8 (3) ◽  
pp. 255-261 ◽  
Author(s):  
Edward S. DeKeyser ◽  
Lauren A. Dennhardt ◽  
John Hendrickson
Keyword(s):  
United States ◽  
Great Plains ◽  
Poa Pratensis ◽  
Management Strategies ◽  
Kentucky Bluegrass ◽  
The United States ◽  
Common Species ◽  
Northern Great Plains ◽  
Past Century ◽  
The Past

AbstractKentucky bluegrass was introduced into the present-day United States in the 1600s. Since that time, Kentucky bluegrass has spread throughout the United States and Canada becoming prolific in some areas. In the past century, Kentucky bluegrass has been a presence and often a dominant species in some prairies in the Northern Great Plains. Sometime within the past few decades, Kentucky bluegrass has become the most-common species on the untilled, native prairie sites of much of North and South Dakota. In this article, we hypothesize how Kentucky bluegrass has come to dominate one of the most endangered ecosystems in North America—the prairie—through a historical, ecological, and climatological lens. We urge others to start addressing the invasion of Kentucky bluegrass with both new research and management strategies.

An AFLP-Based Genetic Linkage Map of Channel Catfish (Ictalurus punctatus) Constructed by Using an Interspecific Hybrid Resource Family

Genetics ◽  
2003 ◽  
Vol 165 (2) ◽  
pp. 687-694 ◽  
Author(s):  
Zhanjiang Liu ◽  
Attila Karsi ◽  
Ping Li ◽  
Dongfeng Cao ◽  
R Dunham
Keyword(s):  
Linkage Map ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
The United States ◽  
Interspecific Backcross ◽  
Aflp Markers ◽  
Production Traits ◽  
Blue Catfish

Abstract Catfish is the major aquaculture species in the United States. The hybrid catfish produced by crossing channel catfish females with blue catfish males exhibit a number of desirable production traits, but their mass production has been difficult. To introduce desirable genes from blue catfish into channel catfish through introgression, a genetic linkage map is helpful. In this project, a genetic linkage map was constructed using amplified fragment length polymorphism (AFLP). A total of 607 AFLP markers were analyzed using 65 primer combinations and an interspecific backcross resource family. A total of 418 AFLP markers were assigned to 44 linkage groups. Among the remaining 189 markers, 101 were not used because of significant segregation distortion, 29 were unlinked, and 59 were eliminated because they span very large distances. The 418 AFLP markers covered 1593 cM Kosambi. The AFLP markers showed a high level of clustering that appears to be related to certain primer combinations. This linkage map will serve as the basis for mapping a greater number of markers to provide a map with high enough resolution for it to be useful for selective breeding programs using introgression.

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