Predation

off of the north coast of Australia and relies on the coral reef for camouflage for hunting as well as for protection from predation from larger fish or marine mammals [4]. Habitat loss from anthropogenic means will result in numbers of Eucrossorhinus dasypogon dropping as they will not have a place that is an integral part of their lives and would likely have a higher predation rate due to the physicality of the shark. In order to keep biodiversity maintenance and sustainability are two factors…

is one of the reasons for increased predation following extermination. I found it interesting that studies found population growth following the killing of animals in a pack, which, according to the article, is because when individuals are killed, pack structure falls apart. In coyotes, this makes females more likely to breed. Draheim also states packs protect their own land, and so when they fall apart, more individuals can come in, leading to more predation. I would like to learn more about…

region as Australia’s native apex predators such as the dingo, have been removed or culled from the area (Milman, 2015). Therefore, with no threat of predation, no fatal disease threats and an extreme reproductive rate, these species have been able to over populate regions all over Australia. Feral animals pose a great threat to native species by predation, competition for food and shelter, destroying habitat, and by spreading diseases. Feral animals are generally solitary and nocturnal,…

Question: Does the odorous smell of Tapinoma Sessile, more commonly known as Blue Cheese Ants or odorous house ants, decrease the rate of predation from predators such as toads? In context: Tapinoma Sessile are common pests in our everyday environment. They vary in size from 2.4 to 3.2 mm and can take shelter both outdoors and indoors. They feed on sugary snacks like honeydew, a glucose-filled fluid produced by small arthropods like aphids. They also feed on dead insects and spiders. To most…

Did reduced recruitment contribute to the collapse of Atlantic cod? There survey results from six stocks of Atlantic cod do not support the hypothesis that the cod collapse off eastern Canada resulted from poor recruitment (Table. 1). Survey results of different cod stock in various regions, as depicted in Table 1, showed that the recruitment from the previous year classes that would have comprised most of the spawners during the year of the collapse was not significantly different from…

In her paper, Shamsie lays out a radicalized version of Robert Bates' and Horowitz's theories of elite predation and ethnic violence in an attempt to better explain what caused the bloody El Salvadoran civil war that engulfed the country in the last two decades of the 20th century. First and foremost, Shamsie attempts to push the boundaries of Horowitz's definition of ethnicity by arguing that the shared experiences between campesinos in El Salvador were so strong that they created a kind of…

The reading states that the pollution hypothesis seemed the more likely cause for sea otter decline and provides three reasons of support. However, the professor states that predation hypothesis is the most likely cause of the sea otter decline and refutes each of the authors' reasons. First, the reading states that increasing in levels of chemicals could decrease the otters' resistance cause infections to life-threatening infections and death to sea otters. The professor opposes this point by…

With the introduction of the Carcinus maenas, the L. littorea with the thickest shell is strongly selective as an anti-predation technique against C. maenas (Hughes et al, 1979). The shell is the thinnest has lower survival against C. maenas predation, whereas, the thicker L. littorea shell is the bigger their survival rate is. L. littorea collection was performed at Fitzgerald J V Marine Reserve, Half Moon Bay California. About 120 snails were collected from the rocky intertidal zone, 60 from…

within a 24-hour period. All quail died within 16 days of the study. Factors contributing to quail fatality were predation, stress, and poor habitat condition. Montezuma Quail rely on cover to escape from predators, and poor habitat quality at the study sites could have been the reason that raptors were the primary mortality agent, effecting nine of the fourteen quail. Canine predation was evident with one quail. One of the captured quail showed signs of fatality from handling stress.…

Results Exercise 1a reproduced the outcome of 30 beetle population size that has a ratio of 1:1:1 in red, orange and yellow phenotypes and indistinguishable predation ratio (1:1:1) over 20 generations. 3 trials out of 4 showed an analogous trend, the highest frequency of alleles is the yellow phenotype after the 14th generation in trial 2 and 3 and 13th generation in trial 4, making the overall surviving beetle population by 20 generations. The red beetle population showed a drastic extinction…