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.

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.

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

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Large Scale ◽  
Growth Data ◽  
Blue Catfish ◽  
Brown Bullhead ◽  
Black Bullhead ◽  
Flathead Catfish ◽  
The North ◽  
Shared Environmental Factor

<em>Abstract</em>.—Growth rates are a core characteristic of catfish populations that are of increasing research interest. However, few studies have synthesized growth data across catfish populations and species to examine large-scale drivers of catfish growth. Here, a metaanalysis of growth was conducted for channel catfish <em>Ictalurus punctatus</em>, blue catfish <em>I. furcatus</em>, flathead catfish <em>Pylodictis olivaris</em>, brown bullhead <em>Ameiurus nebulosus</em>, and black bullhead <em>A. melas</em>, and relationships were documented between growth and climate variables, hydrologic habitats (lentic versus lotic), and latitudinal countergradients (a tendency for faster subannual growth in the north). Blue catfish, black bullhead, and brown bullhead growth correlated significantly and positively with temperature metrics. Blue catfish, flat-head catfish, and brown bullhead growth also correlated significantly and positively with sunshine fraction, wind speed, and evapotranspiration. Channel catfi sh growth did not correlate to any climate metrics. After removal of growth effects related to climate, blue catfish and brown bullhead had significantly faster growth in lotic than lentic habitats. Channel catfish and black bullhead had faster growth in lentic than lotic habitats. Flathead catfish showed no difference in growth between hydrologic habitat types. After standardizing growth by postsexual maturation age and the thermal opportunity for growth, significant and highly predictive countergradient growth relationships (mean <em>r </em><sup>2 </sup> = 0.47) were found for all five species across sites (i.e., faster temperature-standardized growth in more northerly populations). Slopes of these relationships did not differ among species, suggesting similar responses to latitude. There may be a genetic basis for countergradient growth in catfishes that developed over evolutionary scales via selection by a shared environmental factor. Catfish growth is variable within and among species but can be intensely shaped by all three primary factors evaluated in this study.

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.

scholarly journals Movement patterns and home range size of tigerfish (Hydrocynus vittatus) in the Incomati River system, South Africa

Koedoe ◽  
2018 ◽  
Vol 60 (1) ◽  
Author(s):  
Francois Roux ◽  
Gert Steyn ◽  
Clinton Hay ◽  
Ina Wagenaar
Keyword(s):  
Life History ◽  
Home Range ◽  
Large Scale ◽  
Specific Activity ◽  
Movement Patterns ◽  
River System ◽  
Home Range Size ◽  
Range Size ◽  
Management Policy ◽  
Fish Movement

Historical data suggested that the tigerfish (Hydrocynus vittatus) of the Incomati River migrates upstream and downstream as part of their life history. It has been suggested that this movement was a prerequisite for successful spawning in inundated floodplains in Mozambique. Recent advances in aquatic radio telemetry provided a reliable mechanism to monitor fish movement and increase knowledge of the ecology of tigerfish. From 04 January 2003 to 22 December 2003, 41 tigerfish in the Incomati River system were fitted with radio transmitters to record movement patterns and estimate home range size. On average, each fish was tracked 72 times, and the total number of fixes was 2971 over the study period, including 1322 summer fixes and 1649 winter fixes. The mean longest distance travelled by tigerfish was 730 m (range = 75 m to 3200 m). The home range size varied between individual fish, but on average fish stayed within a defined home range of 48 846 m2. Tigerfish showed high site fidelity to specific habitats within specific activity zones and movement occurred primarily within these defined zones. Differences in movement pattern, longest distance travelled and home range size could not be attributed to the sex or size of the fish. No large-scale movement patterns associated with specific life history activity were observed; thus, previous reports of large-scale downstream migrations and spawning migrations appear to be invalid. The presence of weirs in the study area impedes free fish movement as these weirs create migration obstructions.Conservation implications: River regulation such as damming, water abstraction, obstructive barriers and channel modification may have a detrimental impact on the survival strategy of this species. Implementation of these results in a management policy will provide a reliable basis for species specific requirements such as upstream reservoir release management; minimum flow volumes required for downstream ecosystem maintenance and management and planning of structures obstructing natural flow.

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.

Prioritising the rehabilitation of fish passage in a regulated river system based on fish movement

2015 ◽  
Vol 16 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Justin O'Connor ◽  
Frank Amtstaetter ◽  
Matthew Jones ◽  
John Mahoney
Keyword(s):  
River System ◽  
Fish Passage ◽  
Regulated River ◽  
Fish Movement

Flow-related migration, juvenile dispersal and gonad development in two co-occurring mullet species, Mugil cephalus and Trachystoma petardi, in a regulated river system

2019 ◽  
Vol 70 (8) ◽  
pp. 1105 ◽  
Author(s):  
D. J. Harding ◽  
D. T. Roberts ◽  
D. Sternberg ◽  
T. M. Mullins ◽  
M. J. Kennard ◽  
...  
Keyword(s):  
Large Scale ◽  
Gonad Development ◽  
Movement Ecology ◽  
River System ◽  
Fish Passage ◽  
Mugil Cephalus ◽  
Regulated River ◽  
Pit Tags ◽  
Juvenile Dispersal ◽  
Eastern Australia

Catadromous fish species often use elevated flows to migrate from freshwater to downstream spawning grounds. However, in regulated river systems, artificial barriers and flow alteration can disrupt movement cues, affecting fish migration. Using a combination of acoustic telemetry, passive integrated transponder (PIT) tags and gonad maturity data, we assessed the migratory timing and flow requirements for downstream spawning migrations and upstream dispersal in two co-occurring mullet species in the Logan River, eastern Australia. Over 4 years, 141 adult sea mullet (Mugil cephalus) and 28 adult pinkeye mullet (Trachystoma petardi) were implanted with acoustic transmitters and broad-scale movements tracked using an array of 49 acoustic receivers. Juvenile upstream dispersal was monitored using implanted PIT tags and readers deployed in weir fishways. Sea mullet and pinkeye mullet undertook large-scale downstream migrations from February to March. Movements past weirs only occurred once sufficient flow had occurred and, in the case of pinkeye mullet, when gonads were mature. In contrast, juvenile dispersal into upstream habitats occurred primarily between November and April on low flows. This study advances our understanding of bidirectional movement ecology and flow requirements of two co-occurring mullet species to inform environmental flow management (e.g. to facilitate fish passage) in a regulated river system.

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.

Quality Control of Data in a Large-Scale Cancer Register Program

1966 ◽  
Vol 05 (02) ◽  
pp. 67-74 ◽  
Author(s):  
W. I. Lourie ◽  
W. Haenszeland
Keyword(s):  
United States ◽  
Quality Control ◽  
Cancer Patients ◽  
Large Scale ◽  
The United States ◽  
Newly Diagnosed ◽  
Related Data ◽  
Cancer Register ◽  
Independent Review ◽  
End Results

Quality control of data collected in the United States by the Cancer End Results Program utilizing punchcards prepared by participating registries in accordance with a Uniform Punchcard Code is discussed. Existing arrangements decentralize responsibility for editing and related data processing to the local registries with centralization of tabulating and statistical services in the End Results Section, National Cancer Institute. The most recent deck of punchcards represented over 600,000 cancer patients; approximately 50,000 newly diagnosed cases are added annually.Mechanical editing and inspection of punchcards and field audits are the principal tools for quality control. Mechanical editing of the punchcards includes testing for blank entries and detection of in-admissable or inconsistent codes. Highly improbable codes are subjected to special scrutiny. Field audits include the drawing of a 1-10 percent random sample of punchcards submitted by a registry; the charts are .then reabstracted and recoded by a NCI staff member and differences between the punchcard and the results of independent review are noted.

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