Download or read book Competition for Nests Paternal Care and Female Choice in the Bluntnose Minnow Pimephales Notatus microform written by Pot, Willem and published by National Library of Canada. This book was released on 2015 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Male bluntnose minnows guard eggs that they have fertilized in nests under rocks or other objects on the bottom. Competition for nest sites and its effect on embryo mortality were studied using a method for individual recognition based on the pattern of spots on the males' dorsal surfaces. Over a six-day period, new males replaced the guarding males in about 50% of all the nests in the study pond. When males were removed from nests at the height of the breeding season, new males reoccupied almost all nests within one day, whether the nests contained embryos or not. Males preferred to occupy large nests and nests with more embryos. Males that took over a nest usually guarded at least a portion of the embryos from the previous male. Predation of embryos in guarded nests appeared to be minor, but female bluntnose minnows and other small fish possibly eat embryos during fights between males over nests. Laboratory observations indicated that male size was important in competition for nests, and that males with empty nests were most likely to try to occupy another nest. They also showed that guarding males caused the disappearance of a substantial portion of the embryos in their own nests. It is uncertain whether males removed only dead or diseased embryos or unfertilized eggs, or if they ate healthy embryos as well. Female choice was studied in the field. Nest size and proximity of other nests were not important cues. Females preferred larger males, thus probably increasing the safety of their offspring. In the 1983 breeding season, females preferred males with fewer trematode-caused black spots. In the 1984 breeding season, when the number of black spots per male was significantly lower, no such preference was found. These findings support the theory that genetic variation for parasite resistance is maintained by cycles of coadaptation between hosts and parasites, and that parasite resistance is an important cue in mate choice. There was no detectable influence of the number of trematodes on the wet weight of the males or their ability to compete for nests. The parasites are likely to do more damage to young of the year, however.

Download or read book Bluntnose Minnow written by and published by . This book was released on 1999 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chronic Effects of Endrin on Bluntnose Minnows and Guppies written by Donald Irvin Mount and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an investigation of chronic toxicity of endrin to bluntnose minnows and guppies, conducted for 291 days, neither species could withstand concentrations greater than 0.5 parts per billion of endrin in water for more than a few days. Less than 50 percent of the test animals could live in 0.5 p.p.b. for more than 30 days. Approximately 65 percent could live in 0.4 p.p.b. for periods exceeding 30 days, while there was little mortality due to endrin on 0.25 and 0.1 p.p.b. endrin in water.

Download or read book Great Lakes Basin Framework Study written by United States. Great Lakes Basin Commission and published by . This book was released on 1976 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishes of West Virginia written by Jay Stauffer and published by Academy of Natural Sciences. This book was released on 2007-12 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive work on the fishes of WV is the culmination of more than 20 years of res. Contains descriptions of the major river drainages in WV, a brief discussion of the zoogeog. of the fishes within the state, a table of fish dist. by drainage, a guide to the anatomical features used in fish ident., dichotomous keys to the families & species of WV fishes, physical descriptions of all fish species known or expected to occur in the state, & a glossary to supplement the species descriptions. Info. was gathered by: All major fish museums in the eastern U.S. were contacted & records of specimens collected were requested; museums with significant holdings of WV fishes were visited; & New fish surveys were conducted at approx. 1,000 sites throughout the state. Illus.

Download or read book Fishes of the Central United States written by Mark E. Eberle and published by University Press of Kansas. This book was released on 2011-10-10 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the greatly-expanded second edition of a book that has been hailed by In-Fisherman as "magnificent . . . the finest, most comprehensive book on the fishes of the central United States." Featuring the artwork of nationally acclaimed fish illustrator Joseph Tomelleri, it bridges the gap between technical studies and popular field guides in a volume that is indispensable for anglers and naturalists alike. Working with Prismacolor, graphite pencils, and painstaking attention to scientifically precise detail, Tomelleri showcases his ability with stunning illustrations that are both technically and aesthetically satisfying, while also capturing subtle variations among fishes that the camera lens misses. In this new edition he depicts 250 fishes, including 87 appearing for the first time (a more than 50% increase over the original edition), found in 21 states from the Great Lakes in the north through the Mississippi Valley to the southern tip of Texas, and west to the foothills of the Rocky Mountains and Rio Grande. Tomelleri teams up once again with Mark Eberle to provide keen insights into the ecology, natural history, and conservation of these fishes and the types of threats they face. Species accounts are informative but not technical, and are interwoven with folklore and anecdotes. Do you know, for example, what fish looks like "Mother Nature's hand-held vacuum cleaner?" Can you name a minnow that reaches five to six feet in length? Or the fish that sometimes turns up in farmers' fields-alive? What fish has a gizzard? Which one swims a victory lap after it catches its prey? Tomelleri and Eberle reveal the answers and much more in this lavishly illustrated compendium of fish facts and lore.

Download or read book Biological Evaluation of Environmental Impacts written by and published by . This book was released on 1980 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Identification of Larval Fishes of the Great Lakes Basin with Emphasis on the Lake Michigan Drainage written by Great Lakes Fishery Commission and published by . This book was released on 1982 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual for the identification of larval fishes of the Great Lakes basin with emphasis on the Lake Michigan drainage treats 24 families and 148 species. In addition to a key to the families, keys were constructed for selected species within some families. Species accounts include descriptions of adult ecology, reproductive biology, diagnostic characters and meristics. A description of the egg is given, as are morphometric, morphological and pigmentation characteristics of yolk-sac larvae, larvae and juveniles. Illustrations of yolk-sac larvae, larvae and juveniles have been included wherever possible and informative.

Download or read book Ambient Water Quality Criteria written by and published by . This book was released on 1979 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Route 20 FAP 301 from Illinois Route 84 North of Galena to Bolton Road Northwest of Freeport Jo Daviess and Stephenson Counties written by and published by . This book was released on 2004 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CE QUAL R1 written by and published by . This book was released on 1995 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Validity of Laboratory Tests for Predicting Copper Toxicity in Streams written by Jack R. Geckler and published by . This book was released on 1976 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Report written by and published by . This book was released on 1961 with total page 1358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Report Bureau of Sport Fisheries and Wildlife written by United States. Bureau of Sport Fisheries and Wildlife and published by . This book was released on 1941 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Report written by U.S. Fish and Wildlife Service and published by . This book was released on 1961 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishes of the Minnesota Region written by Gary L. Phillips and published by U of Minnesota Press. This book was released on 1982 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fishes of the Minnesota Region was first published in 1982. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. From Northern Pike to the Walleye, this is the definitive guide to all of Minnesota's 149 kinds of fishes. Illustrated with over 80 color photographs, this book will appeal to enthusiastic anglers as well as curious naturalists. Along with a guide to identification, the authors cover habitat, distribution, conservation, and even some recipes. If you catch a fish from one of Minnesota's 10,000 lakes you'll find a description of it in this book.

Download or read book ANL ES written by and published by . This book was released on 1976 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: