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  • Publicado : 9 de marzo de 2011
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1.A study of territoriality in mice.

The chemical communication across pheromones, it is fundamental for the relations between animal species. These substances are particularly important to promote the reproduction, Matching, the aggressive behavior, the identification between groups and between individuals, the social organization, and also territorial marking.
Diverse studies havedetermined that the presence of volatile substances in the urine of rates, contain pheromones, while:
a) Have effects in the conduct that they are immediate and not attributable to another sensory stimulus.
b) Are specific substances of the specie.
c) Minimal influence of the experience exists; since they are born they already know it
d) Indicate the social and reproductive condition of the onewho produces and secretes them.
e) Mice exposed to the smell of this substance show distaste for the origin of the smell, so when mice smell this, they run away.
With these urine characteristics mice can mark a place which is their place and when another group of it comes, they known that this territory is already habited.

2.A study of cleaning habits of mice.

Of the different species ofmice, the hamsters are the cleanest specie because they regularly live in little groups if it is a sociable one or live alone.
All mice species are clean, because they never take the food to their houses; they only eat it and return to their house, that´s why the place where they live is always clean.
Talking about hamsters, they are like humans in their cleaning habits, because they have aspecial place for eat, defecate and also to take a shower.
They take baths of sand what provides a wonderful distraction to them, and it helps them in his cleanliness.
In desert, his natural habitat, the hamsters roll about the sand to clean his hairs and to anticipate the excess of tallow in the same ones. They like this type of activity specially to the small hamsters.

3. Observation ofconditioned responses in different animals.

Animal behavior is the set of answers that present the animals opposite to the internal and external stimuli that they receive of the environment that surrounds them.
The internal stimuli depend on the functioning of the own organism. For example, the sensation of hunger that originates in the stomach is an internal stimulus that provokes the response oflooking for food.
The external stimuli, on the contrary, have his origin in the environment. In this way, the appearance of a predator in the own territory stimulates in the animal the response of be protecting or to defend itself opposite to the aggression.
Every individual, in agreement to his level of complexity, given by the nervous and endocrine system that it possesses, will have toadopt an effective strategy to elaborate the answers that control so much the variations that happen inside his organism as those who originate in his environment.
Every species has a type of behavior that is peculiar, though common forms of behavior exist to many species of animals.
The behaviors of the alive beings can qualify in three big groups:
Innate behavior: the fabric of the spiderweb.
Learned behavior: the lion that happens for a hoop of fire in the circus.
Adaptative behavior: the coypu that swims thanks to the membranes of his back legs.

4. A study of animal phosphorescence and other bioluminescence .

We all know how beautiful is the special light of firefly, This light is produced by the phosphorescence of certain greasy cells that possess such animals, to whichthey are going to stop many pipes that lead up to them the necessary oxygen to the effect.
The functioning of this light is so surprising as that of the batteries of the electrical fish. The beams of light that issues this insect have produced also to certain producing ferments of biological or cold light, which is since is in the habit of being named.
The men must obtain light by means of...
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