Download or read book Ecology and Management of the Bullfrog written by R. Bruce Bury and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Management of the Bullfrog written by Jill A. Whelan and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Management of the Bullfrog written by R. B. Bury and published by . This book was released on 1984 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological invaders in inland waters Profiles distribution and threats written by Francesca Gherardi and published by Springer Science & Business Media. This book was released on 2007-08-30 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive species have come to dominate 3% of the Earth’s ice-free surface, constituting one of the most serious ecological and economic threats of the new millennium, and freshwater systems are particularly vulnerable. This book examines the identity, distribution, and impact of freshwater non-indigenous species and the dynamics of their invasion. It focuses on old and new invaders and provides a starting point for further research.
Download or read book Habitat Suitability Index Models written by Brent M. Graves and published by . This book was released on 1987 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Spatial Ecology of the Exotic Bullfrog Rena Catesbeiana and Its Relationship to the Distribution of the Native Herpetofauna in a Managed River System written by Terra Elaine Fuller and published by . This book was released on 2008 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prior to western settlement, the Trinity River probably offered little suitable habitat for bullfrogs (Rana catesbieana). Anthropogenic habitat modifications such as mining and homesteading may have resulted in conditions more favorable for bullfrogs. Damming in 1963 led to modifications in riverine habitat, producing a highly modified lotic system which is much different from pre-dam conditions. Research has shown these habitat modifications to negatively impact foothill yellow-legged frogs (Rana boylii). My objectives were to determine the downstream distribution of an exotic ranid frog, the bullfrog, and its relationship to the foothill yellow-legged frog, other native amphibians, and the habitats they occupy along the dam-impacted Trinity River. I used census data from 2004 to determine bullfrog occupancy and data on breeding from 2005 to determine bullfrog breeding habitat on the Trinity River. With the occupancy data, I also examined native species composition in relation to bullfrog habitats and plotted bullfrog and native species distribution along the river. Bullfrog occupancy models were developed for both spring/summer high-flow and late summer low-flow surveys, with the low-flow model producing more accurate information than the high-flow model. Top predictor variables for all occupancy models were: max depth, percentage rooted floating vegetation, and river mile, although individual variables showed some variation in significance between the two flow regimes. The breeding model was more stable and out-performed the bullfrog occupancy models. The breeding model had high predictability and was positively correlated with the variables: percentage lentic, percentage rooted floating vegetation, max depth and river mile. Canopy cover was negatively correlated and water clarity had no relationship to bullfrog breeding sites. Most sites where bullfrogs were found also provided habitat for western pond turtles and western toads. Additionally, rough-skinned newts were commonly found at bullfrog breeding sites. Using the occupancy data set, native species and bullfrog distributions were inversely correlated along the 43 mile river reach below the dam. My results suggested that if one wished to control bullfrog populations on the Trinity River the most successful approach would be to focus management efforts on bullfrog breeding sites. Over half of the bullfrog breeding sites were artifacts of historic mining activities, whereas other breeding sites are a result of dam-induced habitat modifications. Making restoration of those sites a high priority could greatly benefit native species.
Download or read book Management of Introduced American Bullfrogs Lithobates Catesbeiana Shaw 1802 in the South Okanagan British Columbia written by Natasha Lukey and published by . This book was released on 2017 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduced invasive species threaten biodiversity on a global scale. An estimated fifteen new species introduction and establishments occur in aquatic systems per decade in Canada. A particular introduced aquatic species of concern in western Canada is the American bullfrog (Lithobates catesbeianus; formerly Rana catesbeiana, Shaw 1802; hereafter referred to as bullfrogs). Bullfrogs were introduced into one wetland in the South Okanagan, British Columbia in the 1950s for human consumption, and have since been detected in 7 locations across 5 wetland complexes. Bullfrog populations were detected by biologists in the South Okanagan in 2003, and shortly after intense bullfrog control efforts were initiated. On-going, resource-intensive detection and removal efforts targeting all life stages were put into place in 2004. Limited resources and lowered detections are prompting the need to determine the potential re-colonization patterns and effort required to successfully continue to suppress populations. Determining potential colonization patterns and optimal future control measures for bullfrogs in the South Okanagan is also of critical importance to the conservation of native amphibians, 50 % of which are federally threatened, endangered, or of special concern. Introduced bullfrogs outcompete, predate upon, transmit disease to, and interfere with reproductive activity of native amphibians. The goals of this thesis were to: 1. develop a distribution model for introduced bullfrogs in the South Okanagan, to: a. estimate the distribution probability of bullfrogs previous to major wetland landscape changes beginning in 2004; and b. project the historical distribution onto the changing wetland landscape post 2004 to prioritize monitoring during average annual wetland conditions, and consecutive flood and drought years anticipated with a changing climate; 2. Analyze nine years of existing introduced bullfrog detection and removal effort in the South Okanagan, to: a. describe the methods, total effort, and results of the bullfrog management; and b. highlight key management lessons learnt through bullfrog control in the South Okanagan. Goal 1 was addressed using species distribution modeling with Maxent®. The distribution model aimed to create a wetland-specific probability distribution for bullfrogs in the South Okanagan for 235 wetlands across a 233 km2 extent. Hydroperiod, water velocity, surrounding matrix at 100 m, 500 m, and 1000 m, distance to nearest known breeding location, and presence of introduced predatory fish were modeled using a minimum training presence threshold to determine wetlands at highest risk of bullfrog colonization and projected onto the future wetland landscape under the 3 scenarios. Maps were validated using 28 % partitioned test data and evaluated using Area Under the Curve and True Skill Statistics. Following Maxent modeling, mapped wetlands were ranked in ArcGIS according to presence of provincially endangered or threatened native amphibian species and number of neighboring wetlands within a 1000 m buffer. Permanent, stagnant, large ponds surrounded by high cover/moisture retaining agriculture (i.e. tree fruit orchard), within 300 m of a breeding location are at highest risk of bullfrog colonization. 60.5 %, 71.5 %, and 47 % of the South Okanagan wetlands are classified for priority monitoring and carry a relative rank value of 0.5 or higher in typical, flood, and drought conditions, respectively. The resulting wetland landscape map from the present study is a water body ranked priority monitoring list for all known permanent and ephemeral wetlands in the study area. The bullfrog distribution map provides wetland criteria, and the ranked monitoring priority list highlights key areas in which to focus future bullfrog monitoring efforts within the South Okanagan. Goal 2 was addressed using the wetland monitoring and bullfrog removal collective data set obtained from the BC Ministry of Environment, BC Ministry of Forests, Lands, and Natural Resource Operations, Environment and Climate Change Canada, and the University of Waterloo, Canada. Bullfrog detection and removal effort resulted in 11 102 introduced individual bullfrogs and egg masses detected and removed at 7 of the 125 surveyed sites in the South Okanagan between 2004 and 2012, with zero detections occurring in 2011 and 2012. Main detection and removal effort included auditory surveys, active searches, Gee trapping, and night-time canoe searches. Approximately 640 and 850 total search hours were expended for auditory and active searches respectively, and 24 670 total 24-hour trap day equivalents of Gee trapping. An additional 310 hours were spent on night-time canoe searches, 2 940 hours were spent on automated auditory recording, and 65 hours on seine netting and night-time active searches by foot. The catch per unit effort (CPUE) of the main methods varied widely among methods and sites, from 0 to 16 ± 55 individuals per trap day for Gee trapping, to 0 to 41 ± 46 individuals per search hour for active searches, and 0 to 28 individuals per hour for canoe searches. Although statistical comparison of methods is precluded due to the post-hoc nature of this analysis, results indicate that the combination of methods selected was successful in reducing abundance at the colonized ponds. However, the variation in CPUE supports the premise that effort needs to be maintained for detection and removal in subsequent years as there are likely additional individuals at low enough densities to avoid detection by standard methods. Here I recommend 10 years of zero detections, based on the Committee for the Status of Endangered Wildlife in Canada (COSEWIC)'s threatened species population trend assessment guidelines. Major lessons learned include: each water body requires an adaptive and robust approach; removal efforts must be persistent; future monitoring should focus on a slight increase in visual effort and slight reduction in auditory effort when populations are at low abundances; and repetitive training is required for observers to ensure accurate identification. The future of bullfrog control in the South Okanagan presents challenges under low population abundance and low detectability, and reduced funding while population suppression is at a critical point in preventing re-establishment. Multiple collaborative efforts combining different agency goals and target species is recommended to help alleviate the resource-limiting pressure for monitoring. Ultimately, the results of this thesis suggest permanent, stagnant, ponds surrounded by high cover/moisture retaining agriculture (i.e. tree fruit orchard), within 300 m of a breeding location are at highest risk of bullfrog colonization, and monitoring should focus on a slight increase in visual effort and slight reduction in auditory effort when populations are at low abundances.
Download or read book American Bullfrog written by Dr George William and published by Independently Published. This book was released on 2024-04-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The American bullfrog, scientifically known as Lithobates catesbeianus, is one of the largest frog species native to North America. With its distinctive deep green coloration and prominent tympanum (ear drum) behind each eye, it is easily recognizable. These amphibians are known for their loud, deep croaking calls, which are often heard during the breeding season. American bullfrogs are highly adaptable and can be found in a variety of aquatic habitats, including ponds, lakes, and slow-moving streams. They are voracious predators, feeding on insects, small fish, crustaceans, and even small mammals. Due to their hardiness and ability to thrive in a range of environments, American bullfrogs have been introduced to many parts of the world outside their native range, sometimes causing ecological disruptions as an invasive species.
Download or read book American Bullfrogs written by Adams Jeff Maurice and published by Independently Published. This book was released on 2024-06-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large and strong, the American Bullfrog (Lithobates catesbeianus) is a native of North America. The bullfrog, which is easily identified by its enormous size and unique voice, is becoming a common species in both the wild and in captivity. Here is a thorough description of this amazing animal: Physical characteristics: The average length of an adult American bullfrog is between 3.5 and 6 inches (9 and 15 cm), while some can grow as long as 8 inches (20 cm). They have strong hind legs that are designed for jumping, a large head, and a robust body. Their green to olive-brown skin, which frequently has dark spots on their legs and back, helps them blend in well with their natural surroundings. Call & Vocalization: During the breeding season, male American Bullfrogs utilize their deep, resonant call, which like a low "jug-o-rum," to attract females and mark territory. This call is one of the species' most recognizable characteristics. Long distances can be heard when a bullfrog calls because of the vocal sac's long-range amplification. Lifespan: American Bullfrogs can live up to 7-9 years in the wild and up to 10-15 years in captivity with the right care. Natural Environment and Behavior To properly care for and provide an environment for American Bullfrogs in captivity, one must have a thorough understanding of their native habitat and behavior. Geographic Range: Originally from the east coast of the United States, the American bullfrog has been brought to many other regions of the world, including the west coast, Canada, Europe, Asia, and South America. They are abundant in many freshwater ecosystems and do well in warm, humid climates. Preferred Habitats: Ponds, lakes, swamps, and rivers with a leisurely pace are among the permanent bodies of water where American Bullfrogs are typically found in the wild. They choose places with lots of foliage because it offers cover and hunting opportunities. Aquatic plants are essential because they provide breeding grounds and cover.
Download or read book American Bullfrog written by Leo Hope Dale and published by Independently Published. This book was released on 2024-02-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The allure of owning an American Bullfrog (Lithobates catesbeianus) as a pet extends well beyond the usual realm of domestic animals. This comprehensive study delves into the history of the American Bullfrog and its varied attractiveness, making it a fascinating choice for anybody seeking an interesting and engaging companion. 1. Context The diverse range of habitats in which the native American bullfrog has evolved is closely related to its complicated evolutionary past. By tracking the species' evolutionary history, we are able to comprehend the adaptation mechanisms that have allowed this amphibian species to prosper in a range of habitats, including freshwater ponds, marshes, and even urban areas. Knowing the American Bullfrog's role in the environment will help you understand its reflexes and intrinsic behaviors. The bullfrog's capacity to control insect populations via predation and its distinctive calls that echo across wetlands demonstrate its vital role in maintaining ecological balance. Examining how it interacts with other species in its home habitat can reveal insights into the intricate web of interactions that constitutes the natural world.
Download or read book Evaluation of Bullfrog Rana Catesbeiana Management in Illinois written by Illinois. Natural History Survey Division and published by . This book was released on 1982 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book African Bullfrogs as Pets written by Ethan Harry and published by Independently Published. This book was released on 2024-08-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are you intrigued by the idea of keeping a unique and strong pet? African Bullfrogs, with their distinctive appearance and fascinating behavior, could be the perfect addition to your home. "African Bullfrogs As Pets" is a complete guide designed for anyone interested in these remarkable amphibians, whether you're an experienced herpetologist or a curious beginner. This book covers everything you need to know to care for African Bullfrogs, ensuring your new pet thrives in its home environment. You'll start by learning about these amazing creatures, including their history, natural habitat, and unique traits. African Bullfrogs are truly special, and this guide will help you understand what makes them stand out. Selecting the right bullfrog is key to a successful pet experience. This book will teach you how to choose a healthy frog, recognize gender differences, and consider factors like age and lifespan to help you make the best decision. Ethical sourcing is also emphasized, ensuring that the frog you bring home has been responsibly obtained. Setting up the perfect environment for your African Bullfrog is essential for its health and happiness. This guide offers step-by-step instructions for creating an ideal habitat, including choosing the right tank size and substrate, managing lighting and temperature, and controlling humidity. You'll also learn about the specific water needs of these frogs, helping you create a home that closely resembles their natural environment. Diet and nutrition are vital parts of African Bullfrog care, and this book covers them in detail. You'll find feeding guidelines that match their natural diet, along with recommendations for foods and supplements that will keep them healthy. The book also helps you avoid common feeding mistakes, ensuring your frog remains well-nourished and thriving. Handling and interaction are important for building a connection with your African Bullfrog. This guide teaches you safe handling techniques, explains how to understand their behavior, and offers tips to reduce stress in captivity. Whether you want to socialize with your frog or simply observe its natural actions, this book provides the knowledge you need. Health and wellness are top priorities for any pet owner, and this guide gives you the tools to recognize common health issues, provide preventive care, and seek treatment if necessary. You'll also find advice on locating a veterinarian who specializes in reptiles and amphibians. If you're interested in breeding African Bullfrogs, this book offers insights into the process, from mating behavior to raising tadpoles and juveniles, all while considering ethical aspects. "African Bullfrogs As Pets" is your essential resource for ensuring a rewarding experience with these extraordinary amphibians. Whether you're new to keeping bullfrogs or looking to expand your knowledge, this guide offers practical advice and expert tips to support you every step of the way.
Download or read book The Book of Frogs written by Tim Halliday and published by University of Chicago Press. This book was released on 2016-01-29 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: “A huge, beautiful compendium of 600 frogs from around the world, from the famed poison-arrow variety on up to the intriguingly named plaintive rain frog.” —Wired With over 7,000 known species, frogs display a stunning array of forms and behaviors. A single gram of the toxin produced by the skin of the Golden Poison Frog can kill 100,000 people. Male Darwin’s Frogs carry their tadpoles in their vocal sacs for sixty days before coughing them out into the world. The Wood Frogs of North America freeze every winter, reanimating in the spring from the glucose and urea that prevent cell collapse. The Book of Frogs commemorates the diversity and magnificence of all of these creatures, and many more. Six hundred of nature’s most fascinating frog species are displayed, with each entry including a distribution map, sketches of the frogs, species identification, natural history, and conservation status. Life-size color photos show the frogs at their actual size—including the colossal seven-pound Goliath Frog. Accessibly written by expert Tim Halliday and containing the most up-to-date information, The Book of Frogs will captivate both veteran researchers and amateur herpetologists. As frogs increasingly make headlines for their troubling worldwide decline, the importance of these fascinating creatures to their ecosystems remains underappreciated. The Book of Frogs brings readers face to face with six hundred astonishingly unique and irreplaceable species that display a diverse array of adaptations to habitats that are under threat of destruction throughout the world. “If you are a serious (and I mean serious) fan of the frog, you are in for a real treat.” —Boing Boing
Download or read book A Handbook of Global Freshwater Invasive Species written by Robert A. Francis and published by Routledge. This book was released on 2012-03-12 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.
Download or read book A Handbook of Global Freshwater Invasive Species written by Robert A. Francis and published by Routledge. This book was released on 2012-03-12 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.
Download or read book Amphibians Guidelines for the Breeding Care and Management of Laboratory Animals written by Institute of Laboratory Animal Resources (U.S.). Subcommittee on Amphibian Standards and published by National Academies Press. This book was released on 1974-01-01 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amphibian Conservation written by Rebecca K. Smith and published by Pelagic Publishing Ltd. This book was released on 2014-05-16 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphibian Conservation is the fourth in the series of Synopses of Conservation Evidence, linked to the online resource www.ConservationEvidence.com. This synopsis is part of the Conservation Evidence project and provides a useful resource for conservationists. It forms part of a series designed to promote a more evidence-based approach to biodiversity conservation. Others in the series include bee, bird, farmland and bat conservation and many others are in preparation. Approximately 32% of the 7,164+ amphibian species are currently threatened with extinction and at least 43% of species are declining. Despite this, until recently amphibians and their conservation had received little attention. Although work is now being carried out to conserve many species, often it is not adequately documented. This book brings together and summarises the available scientific evidence and experience relevant to the practical conservation of amphibians. The authors consulted an international group of amphibian experts and conservationists to produce a thorough summary of what is known, or not known, about the effectiveness of amphibian conservation actions across the world. "The book is packed with literature summaries and citations; a veritable information goldmine for graduate students and researchers. It also admirably provides decision makers with a well-researched resource of proven interventions that can be employed to stem/reverse the decline of amphibian populations." -John G Palis, Bulletin of the Chicago Herpetological Society
