Application of Diel Feeding Chronology to Habitat Suitability Analysis of Warmwater Stream Fishes

Diel feeding chronology and daily ration were determined from stomach or foregut contents of common carp (Cyprinus carpio), golden redhorse (Moxostoma erythrurum), channel catfish (Ictalurus punctatus), smallmouth bass (Micropterus dolomieu), and longear sunfish (Lepomis megalotis) in the Vermilion River, Illinois. Feeding was highly variable among individuals, hours, and months for each species. Discontinuous feeding was detected in common carp, golden redhorse, and channel catfish. Common carp and the two centrarchid species fed with greatest intensity near sunrise and sunset; golden redhorse and channel catfish feeding was highest at night. Daily ration estimates were higher for fishes with stomachs than those for stomachless species. Microhabitats occupied by fish over the diel period were identified using nondisruptive techniques: direct observation, prepositioned electrofishing, and radiotelemetry. Microhabitat use during high-feeding periods was significantly different [Formula: see text] than that during low feeding for at least one habitat variable in each species examined. Association with cover also varied between feeding regimes. Our findings suggest that realism of instream flow assessments may be improved if habitat suitability criteria are stratified by feeding regime.

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River Otter, Lontra canadensis, Food Habits in the Missouri Ozarks

The Canadian Field-Naturalist ◽

10.22621/cfn.v122i4.636 ◽

2008 ◽

Vol 122 (4) ◽

pp. 303 ◽

Cited By ~ 11

Author(s):

Nathan M. Roberts ◽

Charles F. Rabeni ◽

John S. Stanovick ◽

David A. Hamilton

Keyword(s):

Smallmouth Bass ◽

Lontra Canadensis ◽

Micropterus Dolomieu ◽

Widespread Occurrence ◽

River Otters ◽

Lepomis Megalotis ◽

Rock Bass ◽

Longear Sunfish ◽

The Mean ◽

Ambloplites Rupestris

The reintroduction of River Otters (Lontra canadensis) between 1982 and 1992 resulted in widespread occurrence of the species throughout the Missouri Ozarks. This study examined otter diets from the vicinity of two Ozark streams in relation to seasonal and spatial trends. Otter scats (N = 4750) were collected and analyzed from the Osage Fork River and Big Piney River during the summer and winter seasons of 2001 and 2002. During the winter (January-March), fish occurred in 86% of the samples. During the summer (June–August), occurrence of fish dropped to approximately 15% for both rivers. Seven families of fish were identified in the diets, with Centrarchidae being most common regardless of river or season. Within the Centrarchidae, the genus Lepomis (mostly Longear Sunfish, Lepomis megalotis) was most common, with Micropterus (mostly Smallmouth Bass, Micropterus dolomieu) and Rock Bass (Ambloplites rupestris) also well represented. The mean age of Ambloplites consumed (mean = 3.3 years) was consistently older than that of either Micropterus (mean = 2.54 years) or Lepomis (mean = 2.78 years). Crayfish were recovered from a mean of 85.2% of scats in the winter and 99% in the summer. Smaller fish and crayfish were more common from the upper reaches of the streams while larger fish were prevalent in the lower reaches.

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Expression and Inheritance of Growth Hormone Gene Constructs and Selective Breeding of Transgenic Farmed Fish

10.32747/1994.7568774.bard ◽

1994 ◽

Author(s):

Rex A. Dunham ◽

Boaz Moav ◽

Thomas Chen ◽

Benzion Cavari

Keyword(s):

Growth Hormone ◽

Gene Transfer ◽

Common Carp ◽

Ictalurus Punctatus ◽

Channel Catfish ◽

Copy Number ◽

Selective Breeding ◽

Transgenic Fish ◽

Farmed Fish ◽

Aquaculture Production

Objectives: To accomplish stable expression, inheritance of transgenes and growth improvement in transgenic channel catfish, Ictalurus punctatus, and common carp, Cyprinus carpio, containing growth hormone (GH) genes, develop transgenic fish with all fish constructs, determine the relationships between copy number, expression and growth, determine the combined affect of selective breeding and gene transfer and assess environmental risk of transgenic fish. To develop mechanisms of triploidization for transgenic carp. Results: Performance of transgenic channel catfish was made uniform by selection. Growth of channel catfish and common carp was improved 40-50% more by combining gene transfer of GH genes with selection and crossbreeding than with either selection of crossbreeding. Growth improvement of transgenic catfish was not strongly correlated with copy number and expression levels. Progress was made in producting triploid transgenic common carp. Insertion of salmonid GH gene did not alter reproductive performance in channel catfish. Transgenic channel catfish grew no faster than controls when they had to forage on natural food and transgenic individuals were slightly more vulnerable to predation indicating that fitness of transgenic individuals in natural conditions is less than or equal to non-transgenic channel catfish. Contribution to Agriculture: These experiments are the first to demonstrate that transgenic fish can increase aquaculture production in the aquaculture production in the aquaculture environment. This research also demonstrated that maximum benefit of gene transfer in farmed fish is attained when combined with traditional selective breeding.

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Winter residency and activity patterns of channel catfish, Ictalurus punctatus (Rafinesque), and common carp, Cyprinus carpio L., in a thermal discharge canal

Fisheries Management and Ecology ◽

10.1046/j.1365-2400.1999.00175.x ◽

1999 ◽

Vol 6 (6) ◽

pp. 515-526 ◽

Cited By ~ 12

Author(s):

S. J. Cooke ◽

R. S. McKinley

Keyword(s):

Common Carp ◽

Cyprinus Carpio ◽

Ictalurus Punctatus ◽

Channel Catfish ◽

Activity Patterns ◽

Thermal Discharge ◽

Common Carp Cyprinus Carpio ◽

Discharge Canal ◽

Carp Cyprinus Carpio

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Carbon dioxide-induced mortality of four species of North American fishes

Journal of Fish and Wildlife Management ◽

10.3996/jfwm-20-012 ◽

2020 ◽

Author(s):

Hilary B. Treanor ◽

Andrew Ray ◽

Jon Amberg ◽

Mark Gaikowski ◽

Jason Ilgen ◽

...

Keyword(s):

Carbon Dioxide ◽

Rainbow Trout ◽

Common Carp ◽

Ictalurus Punctatus ◽

Channel Catfish ◽

Cutthroat Trout ◽

Management Tool ◽

Published Data ◽

Westslope Cutthroat Trout ◽

Minimum Concentration

There is growing interest in the use of carbon dioxide (CO 2 ) as a management tool for controlling invasive fishes. However, there is limited published data on susceptibility of many commonly encountered species to elevated CO 2 concentrations. Our objective was to estimate the 24-h LC 50 and LC 95 of four fishes (Rainbow Trout Oncorhynchus mykiss , Common Carp Cyprinus carpio , Channel Catfish Ictalurus punctatus , and Westslope Cutthroat Trout Oncorhynchus clarkii lewisi ). In the laboratory, we exposed juvenile fish to a range of CO 2 concentrations for 24-h in unpressurized, flow-through tanks. A Bayesian hierarchical model was developed to estimate the dose response relationship for each fish species with associated uncertainty, and 24-h LC 50 and LC 95 values were estimated based on laboratory trials for each species. The minimum concentration inducing mortality differed among cold water-adapted species and warm water-adapted species groups: 150 mg CO 2 /L for Westslope Cutthroat Trout and Rainbow Trout and 225 mg CO 2 /L for Common Carp and Channel Catfish. We observed complete mortality at 275 mg CO 2 /L (38,672 µatm), 225 mg CO 2 /L (30,711 µatm), and 495 mg CO 2 /L (65,708 µatm (CC); 77,213 µatm (CF)) for Westslope Cutthroat Trout, Rainbow Trout, and both Common Carp and Channel Catfish, respectively. There was evidence of a statistical difference between the LC 95 values of Westslope Cutthroat Trout and Rainbow Trout (245.0 ( 222.2 to 272.2 ) and 190.6 ( 177.2 to 207.8 ) mg CO 2 /L, respectively). Additionally, these values were almost half the estimated 24-h LC 95 s for Common Carp and Channel Catfish (422.5 ( 374.7 to 474.5 ) and 434.2 ( 377.2 to 492.2 ) mg CO 2 /L, respectively). Although the experimental findings show strong relationships between increased CO 2 concentration and higher mortality, additional work is needed to assess the efficacy and feasibility of a CO 2 application in a field setting.

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Behavioural Response of Juvenile Common Carp (Cyprinus carpio) and Juvenile Channel Catfish (Ictalurus punctatus) to Strobe Light

Fishes ◽

10.3390/fishes4020029 ◽

2019 ◽

Vol 4 (2) ◽

pp. 29 ◽

Cited By ~ 1

Author(s):

Jaewoo Kim ◽

Caitlyn Bondy ◽

Catherine M. Chandler ◽

Nicholas E. Mandrak

Keyword(s):

Common Carp ◽

Cyprinus Carpio ◽

Ictalurus Punctatus ◽

Channel Catfish ◽

Light Stimulus ◽

Strobe Light ◽

Invasive Fishes ◽

Common Carp Cyprinus Carpio ◽

Carp Cyprinus Carpio ◽

Physical Barriers

The movement of fish can be regulated by behavioural manipulation through non-physical barrier systems. Aquatic invasive species are becoming one of the major management issues in North America, and threaten native aquatic ecosystems, including freshwater fish. Placements of non-physical barriers in waterways can help disrupt the movement of invasive fish. This study examined the effect of a strobe-light stimulus on the avoidance behaviour of two proxy species, juvenile common carp (Cyprinus carpio) and juvenile channel catfish (Ictalurus punctatus), in a controlled laboratory environment. For each species, three sequential treatments of pre-stimulus, strobe-light stimulus, and post-stimulus for 30 min periods were recorded on acclimated groups of 5 juvenile common carp and 5 juvenile channel catfish using 15 and 13 replicates, respectively. The distribution of juvenile common carp individuals throughout the tank did not change significantly with treatment, nor did cohesive grouping behaviour. Similarly, there were no significant differences across experimental treatments in average location/distance of juvenile channel catfish relative to the strobe light or degree of cohesion in response to the strobe light. Non-physical barriers have been widely reported to vary between species and environmental conditions. These results suggest that strobe lights evoke no avoidance or attractive responses in juvenile common carp and juvenile channel catfish, and will likely not be an effective barrier to inhibit movements of juvenile invasive fishes.

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