Jellyfish Essay Example | Topics and Well Written Essays - 500 words

Jellyfish - Essay Example nd non-conventional information combined with the analytical framework of fuzzy logic that increasing trends of jellyfish abundance were identified to be 62% of the Large Marine Ecosystems (LME). Management and adaptation strategies see to the logical expansion to these articles. However, as with the limited research available on the number of jellyfish, the limited research on management focuses upon human interactions with jellyfish in a way to compensate for the lack of evidence and data. Most management of jellyfish populations is done in context with the fisheries, power generation and tourism industries and management in relationship to their impacts on ecosystems and vital food webs. This is obviously due to their great socio-economic impact hence it is more likely to be funded or pursued. ‘The jellyfish joyride: Causes, Consequences and Management response to a more gelatinous future’ by Richardson et al in 2009 provides a thorough table of management responses from the perspective of both ecosystem and human impacts but it is a brief outline. The recent book ‘Jellyfish Blooms’ devotes an entire chapter to management from a human interaction standpoint. Options presented in the book include: 1) prediction of impending jellyfish blooms via ‘early warning systems’ and appropriate countermeasures before outbursts; 2) Jellyfish Excluder for Towed fishing gear (see Figure 6.3); 3) physical and behavioral screens and barriers; 4) education of when it’s safe to swim to reduce encounters with jellyfish; and 5) modeling programs that predict the distribution of jellyfish so effective forecasts and warning systems can be put in place. Noteworthy is that both the articles and the research have a predominance of negativity toward jellyfish which cannot be denied. With synanthropic nature (Purcell, 2007) of jellyfish benefiting from human stressors including fishing, eutrophication and possibly global warming, these fierce ancient competitors pose

Mice in Kelly Hall Essay Example | Topics and Well Written Essays - 1000 words

Mice in Kelly Hall - Essay Example In a Sylvan habitat where resident deer mice have been removed, other mice are capable of migrating to the new place where mice have been removed to replace them, going as far as travelling from distant places where there are no mice colonies. This migration can take up to two weeks (Douglas, Kuezi, Williams and Samuel Mills 392). House mice are, at most times, nocturnal, although they may appear during daytime. The mice experience poor eyesight therefore, they rely on other senses when moving and looking for food. House mice shelter under buildings and make their nest using materials that are shredded. Breeding periods of mice may occur year-round but when outdoors, it may occur during spring and fall periods, and the population is able to grow rapidly when under favorable conditions. The mice are able to enter structures through jumping, gnawing, and even swimming in water. The mouse can occupy various habitats that arrange from tropical climates to subantarctic islands, and withou t doubt, they can adapt to extreme temperatures (Fox, Barthhold, Davison, Newcomer, Quimy and Smith 31). There are studies carried out on mice and it indicates that they can travel for an average distance of nine meters and because of the limited movements, they do, they become difficult to control (Vector Management Program, n.p.). The mice are capable of memorizing their environment and identify well with essential factors such as food and water. Even though they are capable of identifying new objects that are present in their environment, they do not develop fear of the new objects. In an experiment to investigate the increase in number of mice in a building, several mice were removed in a building but they were quickly replaced. The vacant habitat was occupied by other mice and therefore homeowners must seal their houses when trapping mice in order to prevent other mice from occupying the vacant position. Preventing and Controlling House Mice The three most effective ways of con trolling and preventing house mice include constructing of rodent proof structures, ensuring there is good sanitation and reducing its population. The mice being smaller are capable of entering openings that are narrow hence in most circumstances makes use of rodent proofing difficult. House mice have a limited area for movement and, therefore, they should have no water. The reproduction of house mice, being at a higher rate than that of rats, requires an individual to take into account this information for successful control of the mice. The mice have a large home range hence modifying their habitat is not easy to attain because the mice may be coming from other areas that are beyond control (Salmon and Lick liter 43). It is advisable to try to modify the habitat of mice in the form of ensuring there is storage of food and garbage inside the house. This will only assist in detecting the signs of the presence of house mice and hence increase the effectiveness of using traps; moreove r, mice may live behind cabinets in an office and they will feed on crumbs of lunches people had in the office. No matter how good the sanitation of an office is maintained, the little food stored or consumed is able to support a mice therefore there must be a constant watch for invasion of mice. It is good practice to remove any debris available and control weeds in an effort to reduce the shelter