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 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 Fishes of Oklahoma written by Rudolph John Miller and published by University of Oklahoma Press. This book was released on 2004 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fishing is one of the most popular sports in Oklahoma, a state that boasts over 1,000 square miles of water. Now Fishes of Oklahoma, the only comprehensive handbook available for identifying fishes across the state of Oklahoma, is available to scientists and to anglers interested in knowing more about the fish they catch. Precise keys and clear black-and-white photos or drawings of every species allow for the ready identification of all Oklahoma fishes. Within each species account is a map showing where the fish can be found in the state, as well as information on its habitat and biology. Also included is a color section showcasing brilliant paintings by Rudolph J. Miller. Noteworthy features: • Common and scientific names • Black-and-white photos or drawings of each species • Detailed descriptions of each species • Distribution maps of each species • Habitat and biology information • Recent research on endangered species • Glossary of terms • Color paintings of many species

Download or read book By Leatherwood Creek written by Theodore N. Bailey Ph.D. and published by Xlibris Corporation. This book was released on 2024-09-16 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is one man’s reflection on his observations of the ecology of a small creek near his childhood home in southeast Ohio. As a wildlife biologist, Theodore N. Bailey had extensive knowledge of the flora and fauna that flourished at Leatherwood Creek. His meticulous research into the biological, cultural, and historical aspects of this area provides a wealth of information. At the beginning of each chapter, the author offers personal reflections of the creek from his memories growing up in southeastern Ohio in the 1940s, 1950s, and 1960s. At the end of each chapter, he explores how the region has changed over the years. Backed with scientific evidence, the author’s thoughtful insights will inspire Ohio residents and others throughout the world to cultivate a deeper appreciation for the great diversity of life that is all around us, and a greater desire to take the time to observe and protect our natural world.

Download or read book Fishes of the Central United States written by Mark E. Eberle and published by . This book was released on 1990 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quality of the 163 color drawings is so astonishing technically and aesthetically superior to photographs - that it's a shame that it confines itself to those species most likely to be caught for fun by sportsmen.

Download or read book Investigations in Fish Control written by and published by . This book was released on 1964 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavior of Certain Radionuclides Released Into Fresh water Environments written by United States. Public Health Service. Division of Radiological Health and published by . This book was released on 1959 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by National Center for Radiological Health (U.S.) Interlaboratory Technical Advisory Committee and published by . This book was released on 1965 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Health Service Publication written by and published by . This book was released on 1964 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Health Series written by Esther Ferri and published by . This book was released on 1965 with total page 636 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 Investigations in Fish Control Prepared for Bureau of Sport Fisheries and Wildlife Fish and Wildlife Service U S Department of the Interior written by and published by . This book was released on 1966 with total page 76 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 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Health Series written by and published by . This book was released on 1965 with total page 756 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 and published by . This book was released on 1961 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Environmental Statement FES 75 42 Fishery Rehabilitation of the Rock River Dane Dodge Columbia Fond Du Lac Green Lake Jefferson Rock Washington Walworth and Waukesha Counties Wisconsin written by and published by . This book was released on 1975 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: