This experiment is being conducted to use the capture, mark, and recapture method to determine an estimate population size of an individual in an area. We are testing whether or not this method can be used to accurately estimate the population size. Our approach is to capture as many individuals as we possibly can in a set time, mark and release the individuals, and then attempt to recapture said marked individuals. The overall class estimates received from this experiment were not that far off the actual population size of the individuals. The class data in the end yielded an approximate 12% difference. Introduction: 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 …show more content…
There were two groups who received a difference of over 800 for their estimated population size which affected the class data. On average the groups population estimates varied by roughly 550 individuals. The team that came closest to the actual population was Team 12 who estimated the population to be 2508, while the actual population was 2400. The class data overall yielded an approximate 12% difference. Discussion: Advantages that come with the capture, mark, and recapture method is that you will be dealing with the same species of animal during the capture periods and it will give you an idea of the population size. Unfortunately, there are some factors that make this method unreliable which include, whether or not the population is closed or open, and life and death. An open population makes data collected less accurately measured due to immigration and
The large population sizes of ungulates limit much of the genetic issues associated with selective harvest. However, due to the common hunting strategies individuals, often males, with high reproductive value are removed. Pairing this with the issue of the ‘tragity of the commons’ management of commonly harvested populations is imperative.
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.
2. A sample can be used to estimate a population parameter. How does the sample size affect the estimate? If the sample is larger, what will this do to the error E?
I am studying the Northern Goshawk, a raptor that most often dwells in thick forest in upper North America and throughout the Rocky Mountains. The focus of my investigation is the impact of forest cover on local Northern Goshawk populations, most specifically in areas that have changed relatively slowly in the past few years. This is in the interest of wanting an area that would allow me to determine just how drastically forest changes impact the Northern Goshawk population in the area. Regardless, my principle hypothesis is that if forest abundance declines, then the population of Northern Goshawks in that area will also decline.
9. Assume you want to estimate with the proportion of students who commute less than 5 miles to work within 2%, what sample size would you need?
The population sampled due to its specific nature i.e., college students, and college graduates would need to be contemplated in regards to the testing results as it is offered as a depiction of the general population.
When people talk about deer, they are commonly talking about the North American Whitetail. That is because they are so prevalent in this country. They can be found in every state in the US. The only place where you will not find any whitetails is in parts of Arizona and California. In most states the whitetail is very prevalent, especially in the northeast. They are one of the most hunted animals in this area, particularly in Pennsylvania and Michigan. Despite the amount they are hunted, both in and out of season, you can not drive more than a few miles out of the towns without seeing one that was hit by a car. The deer population in this area just keeps growing. It is unclear what
Please identify three reasons why it is important to resolve taxonomic uncertainty of species in conservation programs.
Secondary data on the number of successful and unsuccessful wolf reintroduction programs can be gathered from state and federal wildlife management agencies from the states of Wisconsin, Minnesota, and Michigan. Collection of the same information from environmental organizations, and other local groups who study predator species is also important to determine if data on wolf reintroduction show similar numbers. If methods of data collection are similar but each has different outcomes, the level of bias should be minimal. Reports on loss of livestock from farmers, ranchers, and hunting groups should also be analyzed and compared with the numbers reported to state and federal agencies. Another piece of secondary data critical to this research
Cons: This method will be time-consuming and financially demanding (Miller et. al, 1999). Furthermore, there is no certainty in the effectiveness of this solution as it relies on many assumptions and predictions made based on research. The assumptions made may not hold true when the process is carried out. This could cause further complications such as endangering deer species due to
The research aimed to find the efficiency of different traps that have been used in Australia as management schemes. The journal gives quantitive data about the number of wild canids that were trapped in each type of management scheming equipment, giving a clear depiction of how effective each method is. The findings within this journal links to the video assignment as it gives data that is able to be further extrapolated into graphs and can be presented visually. The information is linked to the conclusion, the management and solution to the negative effects these wild dogs have on Australian environment, agriculture and biodiversity. The source is credible as it is published within the Wildlife Research, it was conducted and written by a number of qualified authors and has also been cited by many other credible
The main goal of the project was to take measurements and band un-banded Boreal and Northern Saw-whet Owls at the Beaverhill Bird Observatory (BBO) located near Tofield. The bands are lightweight and contain a 9-digit number that is unique to North America. They are placed around the leg of the bird. Banding owls is an incredible experience that is conducted to keep an eye on owl populations. In addition, repetitive banding efforts allow owl populations to be compared (Grigg 1991). Conservation biologists can look-up currently banded owls and find information about where and when it was banded and how it has changed. “Measurements taken include weight, natural and flattened wing chord, and tail length.”(USF&WS 1977)” (Grigg 1991). Our objective
Recently, DNA testing has been employed to create a genetic database of endangered animal species. Using this information, scientists have even cloned animals.
This discrepancy also meant that the sample was unrepresentative of the population. Convenience sampling also allows the opportunity for bias to affect the results. Future research could look at a larger more representative sample to overcome this.
The growth of Chinese power over the past few decades has been nothing short of astounding. Moving from a gradually developing country in the latter half of the twentieth century, China now has established itself as undeniable paramount power in eastern Asia. With this, concerns have grown over security in the Asia given China’s growth in power. Will the rise of China bring with it mostly peaceful relations with its neighbors, or will its rise elicit increased competition within the region as China seeks to further cement its power?