Tuesday, 31 May 2016

Exam Practise

Home range is an area that an animal goes on a daily basis and live on normally, and the animal does not need to defend it against predator.

Daily range compared to home range - The daily range tend to be smaller  this is because it only their daily range.
Rainfall impact on home range size. Rainfall affected the home range sizes either by decreasing the resources for olive baboons. Because the 400-600 yearly rainfall (mm) the home range approximate increases by 43.8 size (km). This is because their habitat is so dry, not enough resources. This causes the Olive Baboons to spread out in order to hunt for resources or food. However at a habitat where rainfall is common for example around 2000, the resources will get enough water from the rain. This means the home range will be small, because they get enough resources that they don’t need to spread out. To search for food.

Rainfall impact on daily range size. Looking at the data table daily range(km) is more spread out at places where there is not much rain. For example from the data table Yearly range of 400-600 will have 5.64 daily range while yearly rainfall 2000 daily range 0.3-2.0 km. This is because more rainfall means better resources, with places that receives more rain means their daily range will be small as they don't have to get far in search of food. Whilst with limited rainfall the daily range will be bigger because the Olive Baboon will have to get far in order to get enough resources.

Habitat impact on home range.
Habitat impact on daily range.
How rainfall impacted on the different habitats.
Why you think these different sizes occur.

Not finish

Tuesday, 3 May 2016

Learning About Migration!

                                           Learning About Migration!

Yesterday we were learning about migration and homing, however it was pretty interesting learning because we went old school learning. This was because our power went off and we couldn't connect to our internet. 
However, it was such an interesting learning periods because we get to make posters and was able to try n example outside class which is sort of like an activity. 

Migration- It is a journey that is often over long distance  after once a year or once in a lifetime often for reproduction or feeding. 
Homing-A short trip home after searching for food and mates.

When migrating birds use visual cues for example like landmarks or motor ways. For homing digger wasp they used cones where home was, however studies shows that it not where the cones were it the shape that the wasp was using as navigating it way to find home. 

As for some birds they use stars as their compass to navigate their way of migrating. In one experiment scientist put birds in a conservatory/star dome, and changed the sky and looked at which way were hoping or wanting to migrate. And they found as they moved the stars it changed it way of migrating.

Some animals e.g pigeons and salmon have been shown using the earth Magnetic field to navigate them to their destination. Experiment with magnets on pigment beats shows that some birds uses magnets because when they put magnetic everywhere it shows that the birds were just flying anywhere and was confused.

And lastly the Sun Compass, as the sun rises in the east and sets in the west, a lower path at winter and higher path in summer. A good example for this is the Bee dance(waggle dance) this allows the bees to communicate with the other bees. By using the angle between the direction of the straight run and the ray opposite gravity is the same as the angle between the food source and the position of the sun.

Advantage of Migration: They will be able to get more resources and meet mates to reproduce more of the species. They might get better environment in terms of predators and disease, or some migrate order to the damage of climate change. Even though birds migrating are not always successful however if they stay at the same place it would becomes a competition for nesting sites for an example. This will also attracts predators to the high concentrations of breeding birds and easy meals of nesting. 
However one principal for birds migrating is the search for food and mating.
Another fact birds put on weight before migrating because they need energy so they can basically carry on their journey. 

Thank you for reading!!!!!!!