OTTERS Annika Rimmer and Maddy Lovetere

Being part of the weasel family, otters are not like other mammals. The key difference of them is that they don't have a layer of blubber. Well, how would that work? Don't they live in the chilly ocean? Well yes, but they have the thickest layers of fur, which keeps them warm.

This graph represents that the population under ideal conditions otters would have a growth with a slow start then a very rapid rate of offspring being born, due to unlimited resources the growth starts to slow down because it can no longer feed or hold the amount of otters.

Due to lack of food, shelter, water and more, the otters are forced to emigrate out of that area of land that they were living in to find more resources in order to survive. Emigration can also be when there is a over populated are where all of these otters live. They have to move out of that area in order to have more other resources that they need.

Immigration is when more otters join a new area. This is due to a selected few from the old population moving in different places in order to find more resources to find and survive. 

Two Density- Dependent Limiting Factors: 1. Competition- when otters fight for resources that they need in order to survive 2. Disease- a disease has occurred in that area where the otter population has been living and now a lot of them are now dying off.

Density-Independent: 1. Storms- A storm comes in and destroys where the otters are currently living and either kills them, and or in bad condition. Another thing about storms killing off them is that they can destroy their homes then in which they have no food, shelter or anything to survive. 2. Drought/ Too Cold: It has come down to something with how they weather is running. Any year could come too early winter or summer. This can cause the otters to either get too hot or too cold. It depends because if it is too hot or cold the food and resources would no longer be available.

Otters give birth in Winter and Spring, one year after mating season. Mother otters can give birth once every year to one-three otters but usually the pregnancy is much longer than humans. The mothers have to stay with their babies, and keep them close by having the baby float on their stomachs.

The number of deaths of the otters all depend on the number of prey that occur in that area. The graph shows that when there are more otters the number of prey is low but, when the population of the otter is low and there aren't that many, this means that the number of prey is high and then there are less otters. (CUTE VIDEO OF A BABY OTTER PLAYING IN HER TUB!!!!!)


Created with images by pixel2013 - "otter otter-baby otter baby" • little_arrows - "otter wildlife nature" • AnnetteHempel - "otter zoo"

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