Download or read book Growth of Blue Catfish Channel Catfish and Flathead Catfish Relative to Latitude and Physical Characteristics of the Lower Mississippi River written by Robert Murrah Mayo and published by . This book was released on 1999 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth of Blue Channel and Flathead Catfish in Selected Habitats of the Lower Mississippi River written by Danny C. Lee and published by . This book was released on 1983 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polish Archives of Hydrobiology written by and published by . This book was released on with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Movement Habitat Use and Spawning Characteristics of Flathead and Blue Catfish on the Lower Missouri River and Tributaries written by Daniel L. Garrett and published by . This book was released on 2010 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: The movement and habitat use patterns of adult flathead and blue catfish were studied via acoustic and radio telemetry in the lower Missouri River and adjacent tributaries including the Grand, Lamine, Chariton, and Little Chariton Rivers. At the largest spatiotemporal scale, annual movement patterns varied greatly from restricted-movement behavior throughout the annual cycle to seasonal migrations commonly tens of kilometers between habitats used for spawning, feeding and growth, and overwintering. Fish moved the least during the overwintering period and the most during the prespawn/spawn period, followed by a third period of restricted movement during the summer and early fall. The diversity in life history strategies suggests that populations of large-river catfish use resources at multiple spatial scales, from the reach to the watershed, to meet life requisites. Diurnal home range and resource selection was investigated during the summer/fall restricted-movement period; an ecologically relevant time frame with respect to feeding and growth. With the exception of few, both species established small home ranges (
Download or read book An Evaluation of the Lower Ohio River Channel Blue and Flathead Catfish Fishery written by Devon C. Oliver and published by . This book was released on 2021 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2015, Illinois changed size and harvest limits for catfishes (blue catfish Ictalurus furcatus, flathead catfish Pylodictis olivaris, and channel catfish Ictalurus punctatus) in the Ohio River to match those of neighboring states in order to provide continuity of the regulations and promote a trophy catfish fishery. Regulations imposed a daily limit of one blue catfish or flathead catfish ≥ 35 inches (88.9 cm) and one channel catfish ≥ 28 inches (71.1 cm) per fisher and a 13 inch (33.0 cm) minimum length limit for all species with no bag limit. Although management regulations were implemented, potential efficacy of the implemented regulations and appropriate (i.e. most precise or accurate with fewest samples) monitoring protocols were unknown. Furthermore, there was general lack of understanding of early life movements, natal dispersal timing and principal recruitment sources that aide in determining appropriate spatial scale for monitoring and managing lower Ohio River catfish stocks. To fill these knowledge gaps the following methods were employed: 1) simulation modeling was used to evaluate precision in estimating catch and size distribution metrics for monitoring population trends with increasing sample size (i.e., sampling events), 2) N-mixture modeling was used to estimate size selectivity of multiple gears using detection probability as a robust alternative to size-specific catchability coefficients, 3) otolith microchemistry (Sr:Ca and Ba:Ca) was employed to determine principal recruitment sources, early life movement patterns, and provide fisheries managers with a better understanding of the spatial extent to which management actions should be implemented, 4) Bayesian modeling was used to estimate growth and mortality, 5) Yield-per-recruit modeling was used to estimate and evaluate fishing mortality rates that would result in growth overfishing (FMAX) and yield at FMAX (YPRMAX) for three management scenarios (no regulation, minimum length limit [33.0 cm or greater] and a permissive slot limit [33.0 cm-88.9 cm; blue catfish and flathead catfish]). The simulation models presented account for the uncertainty associated with heterogeneous selectivity of a gear, and minimize the impact of rare or extreme catch values. Trotlines and low pulse (15-pps) electrofishing generally required the fewer samples to achieve stable values of catch per unit of effort (CPUE), proportional size distribution (quality; PSDQ), and coefficient of variation (CV) than other gears based on simulation modeling. Abundance and detection probabilities were estimated separately for each species of catfish by length category within and across gears, producing a species-gear-size correction for catch bias used in estimating Proportional Size Distribution-Quality (PSDQ). Corrected (i.e., accounting for detection) PSDQ values were lower than uncorrected estimates suggesting a positive bias for larger fish across the entire sampling regime. Managers should use a combination of low pulse electrofishing, trotlines, and high pulse (60-pps) electrofishing in their monitoring efforts for all three species. Based on microchemistry, ictalurid catfishes in the lower Ohio River appear to recruit from multiple sources and make movements across a broad geographic scale. Additionally, some catfish may be originating from outside the portion of the Ohio River that is managed by Illinois (lower 214 km). Fisheries managers should take this into account when implementing management actions. However, most ictalurid catfishes originated from riverine (e.g., Ohio and Mississippi River) natal environments and not from smaller tributaries, and managers should not expect tributaries to compensate for weak year-classes within the river. Based on yield per recruit modeling, catfish stocks are unlikely to benefit from current regulations or a theoretical minimum size limit given the near complete overlap of YPRMAX confidence intervals for all estimable scenarios and the small statistical difference (1-3%) based on FMAX between the most permissive and most restrictive scenarios. While statistical differences in FMAX exist, they are likely biologically irrelevant, exceeding the precision of estimation methods for F. While there is some indication that alignment and continuity of management regulations is warranted based on microchemistry, the efficacy of the current permissive slot regulations is questionable based on the models presented and the life history of these fishes. There is no advantage to implementing any of the modeled regulations in terms of increasing FMAX or YPRMAX.
Download or read book Some Biological Characteristics of a Channel Catfish Population in the Lower Des Moines River with an Evaluation of Potential Commercial Harvest written by James Mayhew and published by . This book was released on 1972 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Qualitative System to Evaluate Populations of Channel Catfish and Flathead Catfish in the Missouri and Mississippi Rivers Final Report written by John Wesley Robinson and published by . This book was released on 1997 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress Report from the First Year Study of Sub legal Sized Channel Catfish in the Mississippi River written by Don R. Helms and published by . This book was released on 1973 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relative Species Abundance Age Growth and Habitat Use of the Blue Channel and Flathead Catfish in Four Alabama Waterways written by Matthew D. Grussing and published by . This book was released on 1997 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics and Growth of Commercially Exploited Catfish Populations in the Lower Missouri River written by Daniel "V." Ragland and published by . This book was released on 1972 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catfish 2000 written by Elise R. Irwin and published by . This book was released on 1999 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variations in the Abundance of Channel Catfish Year Classes in the Upper Mississippi River and Causative Factors written by Don Helms and published by . This book was released on 1975 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fecundity of Flathead Catfish and Blue Catfish from the Mississippi River Between Hannibal and Cape Girardeau Missouri written by Jacob D. Colehour and published by . This book was released on 2009 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 48 female flathead catfish (Pylodictis olivaris) and 35 blue catfish (Ictalurus furcatus) were collected and sacrificed from the Mississippi River during June 2007. Fish were sexed, measured, weighed, and the following tissues were sampled: blood, pectoral spines, otoliths, and ovaries. Ovaries were weighed and two sub-samples of each ovary were collected, weighed, and counted. Total number of eggs was compared in a linear regression to length, weight, age, hormone level, and GSI (gonadosomatic index). Simple linear regression analysis indicated that the best predictor of egg numbers was length and weight of flathead catfish and blue catfish. Blues: Eggs = 173.6 * length (mm) - 82375 (p = 1.5E -14 and R2 = 0.86) and Eggs = 5899.1 * weight (kg) + 9841.5 (p = 2.08E -18 and R2 = 0.92). Flatheads: Eggs = 79.3 * length (mm) - 34325 (p = 7.83E -21 and R2 = 0.85) and Eggs = 2419 * weight (kg) +5437.3 (p = 5.8E -22 and R2 = 0.87). Linear regressions will assist natural resource managers with calculating recruitment and fecundity of flathead catfish.
Download or read book Habitat Suitability Index Models written by Thomas E. McMahon and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age and Growth of Flathead Catfish and Channel Catfish in the Tallapoosa River Alabama and the Ocmulgee River Georgia written by Melissa Kathryn Nash and published by . This book was released on 1999 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age Growth Sexual Maturity and Food of Channel Catfish in Central Lake Oahe 1968 69 written by Victor J. Starostka and published by . This book was released on 1974 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Channel catfish were collected with gill nets, trawl, and trap nets at three localities in Lake Oahe for the study of year-class strength, growth in length and weight, age composition, sexual maturity, and food.
Download or read book Selected Population Characteristics of Channel Catfish Ictalurus Punctatus and Flathead Catfish Pylodictis Olivaris in the Lower 200 Miles of the Wabash River written by Zachary J. Willenberg and published by . This book was released on 2000 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
