Scaup Population Decline

The aims of using VORTEX (Lacey and Pollak, 2014) was to analyse the success of management strategies including controlled hunting, supplementation, habitat restoration and corridors or a combination. VORTEX takes into account random events such as catastrophes running through iterations (replicas) to generate outcomes (Lacy, 1993). Each outcome will be assessed using probabilities of survival, genetic diversity and mean population sizes over a 200 year period.

The Hawaiian Duck is blessed with one of the best habitats in the world. It resides in the beautiful islands and the epitome of all beautiful islands known as Hawaii. They are mostly found in lowland wetlands, river valleys, and mountain streams. This works to this bird’s advantages. They mostly try to stay away from the more urban parts of Hawaii and stick to their usual wetland setting. However, there not much of these habitats around on the virtually miniature island of Hawaii, which makes this bird’s effort of trying to stick around, just that much harder. Its endangerment has a large part to do with the fact that you cannot find all of these elements in many places on the island of Hawaii. The Hawaiian duck’s habitat is a huge part of what this bird is and how it functions through its

The mystery of migration patterns of Mallard Ducks is fascinating. Understanding a migratory pattern and reasons for migration, can help me learn the behavior of a certain species of a duck and help me in knowing when and where to hunt. Mallard ducks migrate south every year from their breeding grounds. The reason they do this is the shortage of food in the winter months. As they make their way south, they use many different paths such as flyways.

Over 20 species of ducks have been recorded on SVWMA. The most common species include northern pintail, mallards, gadwall, canvasbacks, and ruddy ducks. Ducks nesting on the area include northern pintail, gadwall, northern shovelers, cinnamon teal, ruddy ducks, and others. Canada geese are commonly found on SVWMA; white-fronted and snow geese are infrequent visitors. Tundra swans visit SVWMA, but are relatively uncommon.

The males choose the nesting place which is ideally in a large tree near bodies of water. They live in the Black Hills but, with sites like these declining it is making it hard for the population to expand.

The Canada Lynx, with its characteristic silver-brown coat and tuffed ears, is coming face to face with the threat of extinction – at least in the woods of Maine. The population of this North American mammal, which can be found in Canada, Alaska and some parts of Northern U.S., is quickly declining due to environmental changes taking place in their habitat. In an effort to fight back, the U.S. Fish and Wildlife Service is teaming up with private landowners to recreate the habitat the Canada Lynx needs to hunt and prosper.

Their mating season is in march and the female mates twice. Then she is pregnant 40-70 days until embryo is set then is pregnant 30 more days.

Their nest sites are among marsh vegetation in shallow water (sometimes up to 3 feet deep), sometimes on dry ground close to water. The nest (built by both sexes) is a mound of plant material pulled up from around the site; it may be built up from bottom or may be floating, anchored to standing plants. Females typically lay two eggs, which both parents incubate. Males take responsibility for defending the

Intro: The issue at hand are one that deal with conservation, the question asked by so many Americans is that, are the economic success of the Alaska Oil industry worth the conservation of wildlife? This report will demonstrate the problem at hand regarding Alaska Oil and the solution to the problem as well.

Species for which the model in Dwyer et al. (2014) performed well are widespread and occupy many habitats in California, but those that performed poorly are at least seasonally tied to specific habitats or geographies. For example, all three species occupy areas with topographic variation. Golden Eagles and Turkey Vultures are obligate cliff nesters, while Common Raven is a facultative cliff nester that also nests in trees and sometimes on powerline poles and transmission towers (Thelander 1974, Grinnell and Miller 1944). In flat areas, power line poles may extend the usefulness of associated habitats to these species by offering elevation over surrounding terrain, a wide field of view, and a point for easy take off (Benson, 1981; Stahlecker,

Estimating home ranges and understanding habitat use and the temporal distribution of that use is essential for understanding and conserving wildlife populations. As a concept, home range can be defined as the area traversed by an individual in its normal activities of foraging, mating and caring for young (Burt, 1943). In this way, a home range can be thought of as a spatial depiction of behaviors fundamental to a species’ evolution and persistence. While its ecological significance is clear, the anthropocentric importance of a species’ home range derives from its role in mediating human-wildlife interactions and wildlife management. The size and amount of overlap among individuals’ home ranges as well as the timing of habitat use within a home range will affect the probability and nature of human-wildlife encounters. In most jurisdictions, habitat management is a fundamental component of wildlife management programs(E. J. Bergman, Bishop, Freddy, White, & Doherty, 2014; K. Bergman, 2001; Fiedler, Landis, & Wratten, 2008). This holds true for American black bears (Ursus americanus) which are classified as a game species in 28 of the 41 states in which they are present (Hristienko & McDonald, 2007). Contemporary management programs often center on augmenting or maintaining high quality wildlife habitat, the definition of which has primarily depended on a basic understanding of the species’ general ecology.

A typical gestation period will last anywhere between twenty-four and twenty-eight days, with a female S. armatus birthing an average of 5.8 offspring (Eshelman et al. 2000). Breeding occurs only once a year, usually some time in May (LaValle 2000). In regards to nutrition, grass leaves make up 90% of the diet during the first month of life. Overtime, grass leaves, grass seeds, forbs leaves, and some aquatic plants become the primary sources of energy (Eshelman et al. 2000).

There are a variety of methods that can be used when trying to estimate population size. A common method used by wildlife biologists is the capture, mark, and recapture method. This method is particularly useful when trying to estimate the population size of a mobile or far-ranging species. Some

Audubon is one of the United States’ oldest nonprofit organizations and their mission is to “protect birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground conservation” (About Us ). Founded in 1905, The Audubon Society was formed in response to the massive slaughters of waterbirds, like egrets and herons. Born with a daunting mission, the National Audubon Society has never stopped defending birds by using groundbreaking science and education. The Audubon’s website is located at www.audubon.org and this website’s intended audience is people who

My field partner and I arrived at 12:31 PM exactly on a beautifully clear day. Knowing that dawn and dusk provide the best environment for wildlife viewing, the afternoon was not our first choice for visiting and observation. However, with opposite schedules, my partner and I collaborated and settled on the afternoon. The weather and timing provided a leisurely feel to the afternoon and was great for waterfowl viewing. If I were to make any suggestions to anyone with high hopes of mammal sightings, I would offer that this time of day may not be the most satisfying within the Area. The Yolo Bypass Wildlife Area holds promise for many waterfowl, raptor, mammal, and other organism viewings due to its compact and diverse physical processes. Within the area my partner and I selected for extended viewing, we literally sat within the borders of wetlands, grasslands, and rice fields.