Download or read book Population Dynamics and Trophic Ecology of Northern Pike and Smallmouth Bass in Coeur D Alene Lake written by John David Walrath and published by . This book was released on 2013 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adfluvial Westslope Cutthroat Trout Oncorhynchus clarkii lewisi populations have declined significantly since the 1900s in Coeur d'Alene Lake, Idaho. The Coeur d'Alene Tribe has an intense Passive Integrated Transponder (PIT) tagging program and has reported poor juvenile to adult return rates, which is hypothesized to be a result of predation by nonnative species, such as Northern Pike Esox lucius and Smallmouth Bass Micropterus dolomieu . Sampling occurred on 138 days and 15,645 individual fishes representing 24 species were captured. The population structure and dynamics of Northern Pike and Smallmouth Bass were similar across sampling locations. After pooling data for Coeur d'Alene Lake, growth of Northern Pike and Smallmouth Bass was compared using meta-analysis to other populations across their distributions. The potential effect of predation by Northern Pike on Westslope Cutthroat Trout was evaluated with bioenergetics modeling. Northern Pike (i.e., 2008-2011 year classes) consume an estimated 5,641 Westslope Cutthroat Trout annually from the four sampling locations (i.e., Cougar, Wolf Lodge, Windy bays, Benewah Lake) in Coeur d'Alene Lake.
Download or read book Life History Population Dynamics and Habitat Use of Northern Pike in the Coeur D Alene Lake System Idaho written by David Henry Bennett and published by . This book was released on 1990 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics Food Habits Movement and Habitat Use of Northern Pike in the Coeur D Alene Lake System Idaho written by Bruce A. Rich and published by . This book was released on 1992 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics Food Habits Movement and Habitat Use of Northern Pike in the Coeur D Alene River System written by Bruce A. Rich and published by . This book was released on 1992 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology and Ecology of Pike written by Christian Skov and published by CRC Press. This book was released on 2018-01-09 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book sets out to bridge the order scales among pike researchers, populations, communities, management, and fisheries. It emphasizes the progress of pike research during the last two decades, during which the order-bridging approach emerged. This framework underpins the text and the message, to convey its importance to pike research and to fish research in general. In addition, a considerable part of the book is devoted to management implications and highlights aspects of human dimensions in recreational fisheries.
Download or read book Pike written by John Craig and published by Springer Science & Business Media. This book was released on 1995-10-31 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pike and related fish form an important part of aquatic ecosystems and are also commercially very valuable. This title provides full coverage of the biology, ecology and exploitation of this important group of fish and will be invaluable for fisheries scientists, fish biologists, aquatic scientists, ecologists and environmental scientists.
Download or read book Trophic Ecology of Largemouth Bass and Northern Pike in Allopatric and Sympatric Assemblages of Voyageurs National Park Minnesota written by Craig A. Soupir and published by . This book was released on 1998 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations Into the Feeding Habits of Piscivorous Fishes in Coeur D Alene Lake Idaho written by Jennifer L. Scott and published by . This book was released on 2002 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Coeur d'Alene Tribe of lndians have proposed a westslope cutthroat trout, Oncorhynchus clarki lewisi, production facility to enhance adfluvial populations within the Coeur d'Alene Lake System. Westslope cutthroat trout are a species of special concern in Idaho. One of the limiting factors to be examined prior to implementing the trout hatchery was the potential for predatory fish to eat cutthroat trout after they migrated into Coeur d'Alene Lake. The annual feeding habits of the five major piscivorous fishes were examined from Coeur d'Alene Lake, the lateral lakes of the Coeur d'Alene River and lower sections ofthe St. Joe River, Idaho to determine the importance of the westslope cutthroat trout in their diets. Fish were collected by boat electrofishing, horizontal gillnets, vertical gillnets, and angling. Stomach contents were extracted from the stomach and preserved in 10% formalin. Fish remains in predator diets were keyed using diagnostic bones. Diagnostic bone length to total body length regressions were used to back calculate the original size of the prey fish. Of 493 stomachs examined, nine westslope cutthroat trout could be positively identified in the stomach contents. Six were in northern pike (Esox lucius) stomachs, two were from chinook salmon (O. tshawytscha), and one from a smallmouth bass (Micropterus dolomieui). Cutthroat trout were not found in any northern pikeminnow (Ptychocheilus oregonensis) or largemouth bass (M. salmoides) stomach samples. The average size of cutthroat trout consumed by these piscivores was 215 mm in total length, which correlates with the average size of a four year old in this system. The cutthroat trout consumed by predators in this study were likely first year spawners or making their first adfluvial migration into the lake from natal tributaries. In many chinook salmon and northern pikeminnow stomachs, salmonids were present, but could not be keyed to species due to extensive digestion and/or lack of diagnostic bones. Northern pike seemed to pose the biggest threat to migrating cutthroat trout. Northern pike are typically found in shallow water, as were cutthroat trout in this study. Westslope cutthroat trout were identified in 23% of northern pike stomachs analyzed (n=26). Chinook salmon and northern pikeminnow typically consume fish in pelagic waters; cutthroat trout were positively identified in 5% of chinook stomachs (n=43) examined and none were found in northern pikeminnow stomachs (n=227)"--Document.
Download or read book Synopsis of Biological Data on the Northern Pike written by Alexander J. P. Raat and published by Food & Agriculture Org.. This book was released on 1988 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Ashtabula Northern Pike Population Dynamics written by Brandon J. Kratz and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Northern Pike written by Rodney B. Pierce and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The northern pike--sometimes affectionately known as the "aquatic wolf"--is one of the most sought after and mythologized fishes in Minnesota, but until now there have been few books devoted to the history and ecological management of the species. Based on pioneering research carried out in Minnesota by leading pike specialist Rodney B. Pierce, Northern Pike Ecology, Conservation, and Management History is the most complete collection of information to date on the species, for everyone from scientists and conservation biologists to general readers and recreational anglers. A tremendously important game fish and resource both in Minnesota and throughout the northern hemisphere, northern pike populations directly reflect local geology and human influence, playing a key role in the health of freshwater ecosystems. As urbanization spreads and the human population continues to grow, pike populations face increasing pressure, requiring new ways of looking at and managing the species. In Minnesota, groundbreaking work has been conducted on northern pike: analyses of stocking success and investigations into the relationships within fish communities, the management of rearing marshes, environmental effects on natural production, the genetics of northern pike, and strategies for scientifically monitoring pike. The state has been a leader in developing fishing regulations to help restore large pike, among many other measures designed to ensure the future quantity and health of a key species in Minnesota's waterways. Weaving significant historical scientific literature and technical details together with his own research, Pierce's benchmark study documents and synthesizes the long history of northern pike management and describes the latest efforts being taken to better understand and manage this critical and renowned species.
Download or read book Supporting Data for the Habitat based Population Models Developed for Northern Pike Smallmouth Bass Largemouth Bass and Yellow Perch written by Canada. Dept. of Fisheries and Oceans and published by [Burlington, Ont.] : Fisheries and Oceans Canada. This book was released on 2005 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Northern Pike written by and published by . This book was released on 1978 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stunted Northern Pike written by Terry Margenau and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supporting Data for the Habitat based Population Models Developed for Northern Pike Smallmouth Bass Largemouth Bass and Yellow Perch written by and published by . This book was released on 2003 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Characteristics of a Closed Northern Pike esox Lucius Catch and release Population in Minnesota written by John Kempe and published by . This book was released on 2018 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Freshwater fisheries are typically open to exploitation, and are often a major part of local economies. Overexploitation is becoming increasingly common with new technologies, resulting in loss of genetic diversity, altered food webs and declines in angler catch rates. Population dynamics of unexploited freshwater fish populations are rare, and offer insight into how a natural aquatic ecosystem functions. Shingobee Lake has been closed to the harvest of Northern Pike since 2005, and had a long-term tagging study in place from 2009-2017. The length of the study, lack of exploitation and high tagging percentage (37-59%) provide a unique insight into the population dynamics of a catch-and-release Northern Pike population. The Northern Pike population in Shingobee Lake is female dominated and consists of large, slow growing individuals with low mortality rates. Abundance estimates throughout the study period remained stable (21-33 fish/ha) and a catch curve indicated an overall mortality rate of 31%. Growth rates were slower than the international growth standard and inter-annual weather patterns did not influence growth as much as fish density. Proportional stock density ranged from 42-58 demonstrating a stable size structure. Restricting Northern Pike fishing to catch-and-release only improved the size structure and protected large, older individuals."--Abstract.
Download or read book Prey Selectivity and Population Dynamics of a Lentic Fish Community Twin Lakes Washington written by David R. Christensen (Fisheries biologist) and published by . This book was released on 2005 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The establishment of non-native species, largemouth bass (Micropterus salmoides L.) and golden shiners (Notemigonus crysoleucus M.) in Twin Lakes, Washington is of concern for potential negative impacts on resident trout populations. Bass were first documented in Twin Lakes in the 1980’s and shiners were confirmed there during the early 1990’s. Since then, golden shiners have become a particular problem, as they compete with trout for food resources and, unlike bass, are not a game fish. Other problems related to eutrophication, such as dense weed beds are also believed to impact Twin Lakes fisheries. A floating-leaved macrophyte, watershield covers about 6% (58 acres) of the summer North Twin surface area and about 2% (19 acres) in South Twin Lake. Because these plants grow in the littoral area, crucial to fish spawning and feeding, the varying coverage between the lakes may affect fish interactions, including bass piscivory. The goal of this study was to develop information on water quality and trophic interactions within the Twin Lakes fish communities to guide fishery management decisions. In particular, data were developed to examine specific management options, including macrophyte reduction and whether bass slot-limits could enhance bass predation on shiners. Increased predation could serve as an indirect control mechanism for shiners, preventing further population growth. Seasonal trophic interactions within the Twin Lakes fish community were examined by monthly sampling from June to September in 2004 and 2005. Length/weight measurements were made and stomach contents were taken by gastric lavage on electrofish- and gillnet- captured individuals. Fish diets were characterized by identification of stomach contents. Population estimates were calculated from mark-recapture data using the Schnabel multiple-census method. Length class histograms were constructed for each species to assess population size distribution. Growth and condition factors were also calculated and compared to regional and national averages. Basic water quality data, including dissolved oxygen and temperature profiles were determined on the same dates. Available trout habitat volume for each lake was calculated from this data. There was significant variation in diets of different age fish as the season progressed. Large bass primarily consumed crawfish, golden shiners, and other fish. Diets of medium bass consisted principally of macroinvertebrates and golden shiners; while small bass diets were feeding on macroinvertebrates and a few golden shiners. The smallest bass consumed only zooplankton and macroinvertebrates. Brook and rainbow trout consumed primarily midges, scuds, and zooplankton. High relative weight (Wr) condition factors and growth rates indicate that current Twin Lake trout populations are generally healthy. However, combined effects of eutrophication and invasive species could have a detrimental impact on Twin Lake salmonids in the near future. Our results indicate that measures to increase bass survival that would shift the population histogram to larger sizes would likely increase predation pressure on shiners. Also, reducing macrophyte densities could also increase predation on shiners by reducing available shelter and by opening lanes for ambush feeding. Implementation to achieve these goals could include fishing slot limits for take of larger bass and varying schemes for mechanical macrophyte harvesting."--Abstract.
