Thursday, October 28, 2010

Galapagos Blue Footed Boobies

The Blue Footed Boobies mate by whichever male has the best dance and whoever has the brightest feet. They can dive in water a little as three feet deep, and they gather in the thousands. Their blue feet coloration genes get passed down through generations, so eventually all of the boobies feet are blue.

Wednesday, October 27, 2010

Sex and the Single Guppy

1. Even though bright colors attract predators, the coloration of the guppies depend on where they are in the stream. It varies with each stream or river, and through different parts of the stream. Bright colors also attract mates. A scientist, Endler, wanted to test these discoveries, finding this as his results.

2. After viewing the fish gallery, I think that the Poecilia reticulata is my favorite fish. The origin of this fish is Brazil. It's average size is about 3.5 centimeters. It is a male, so it has many bright colors. It is probably the brightest of the gallery of fish. It is mostly dark blue on the top side of the fish, but towards the bottom, it has splotches of yellow and green. The tail is green and the dorsal fin is orangish.

3. After viewing the predator gallery, I think the Fat Sleeper, or the Dormitator maculatus, is the most interesting of the predators. It has distributed to Southern North America, Bahamas, and Latin America.

4. The size of the body of water and the size of the predator fish will affect the predator population.

5. John Endler is an evolutionary biologist who began studying wild guppies in the 1970s. He studied it in various streams and found that the coloration of the guppy depends on where the guppies are.

6. Pool 1: Brightly Multi Colored with large spots.
Pool 2: Medium coloration on body and tail, with medium sized spots.
Pool 3: Drab coloration, very small spots concentrated near tail.

7. I think in different parts of the stream, the coloration of the guppies vary depending on the amount of predators and females in that particular part of the stream. I think that bright guppies will last the longest, because they attract mates, and the rest depends on the amount of predators in the area.

% of Brightest Guppies
(10 generations)

% of Bright Guppies
(10 generations)
% of Drab Guppies
(10 generations)
% of DrabbestGuppies
(10 generations)

Trial 1

Guppy: Even Mix
: 30 Rivulus

57% 25% 14% 5%

Trial 2

Guppy: Even Mix
: 30 Rivulus, 30 Acara

4%61% 35% 0%

Trial 3

Guppy: Even Mix
: 30 Rivulus, 30 Acara, 30 Cichlid

0% 11% 7%82%

Trial 4

Guppy: Mostly Bright
: 30 Rivulus

64% 30% 5% 2%

Trial 5

Guppy: Mostly Drab
: 30 Rivulus, 30 Acara, 30 Cichlid

0% 0% 0% 100%

8. Predators influence guppy coloration because they can spot the brightly colored ones ore easily than the drab ones. So depending on the amount of predators in the area, there with be more/less brightly colored ones.

9. My hypothesis was not correct because depending on the variables, there were more drab guppies than bright guppies.

10. I think it means that male guppies health depends on reproducing, and not being eaten. Male guppies depend on others to stay healthy.

11. In different areas of the stream, there are more or less predators, and depending on the amount of predators, there is a greater population of guppies.

12. If mostly drab guppies were placed in a stream with very few predators, they would probably overrun the predators because drab guppies are harder for the predators to spot, so eventually the predators would die out.

13. If brightly colored guppies were placed in a stream with many predators, the predators would overrun because the bright colored guppies are easier to spot, and eventually would die out since there are so many predators.

Wednesday, October 6, 2010


Biodiversities everywhere have a sharp decline in the species that help maintain the delicate balance the biodiversity holds. More than one million species in ecosystems around the world will disappear in as little as 50 years. Over fishing, pollution, research, and many other human related activities are large contributors to the effects that the biodiversities are experiencing. Even when we have done nothing to intentionally disturb some creatures, but by disturbing others, like the seal, for example, otters are now being targeted by whales, who have lost seals, their main source if nutrition. Be use of this, humans are also being effected, although we might not know it.

Over a long period of time, medicines that could be found from some of these species that we are harming, are also becoming more and more scarce. Loosing the animals can reduce our chances of the human species living the longest it can. After many many studies, scientists have already found some medicines that could solve huge problems in the health department, but they will never know because they do not have enough of the sour e to test their discoveries.

In addition to loosing some of the most important scientific discoveries, some less industrialized countries are dying off from starvation. The species that are dying out, are probably somebody else's way to survive, and that someone may be one of our own kind.

Of course, there is also pollution. Although we are trying to get everyone motivated to reduce, reuse, recycle, there is just not enough people doing it.toxic chemicals are poisoning wildlife everywhere, and by poisoning them, we will also be effected in a negative way.

Humans are becoming more vulnerable as the change continues on because of loss of coral reefs. Reefs are natural barriers and help prevent damage from floods, tsunamis, hurricanes, etc. Without them we are more vulnerable to natural disasters. There are many cultures that are attached to a certain ecosystem, and without that ecosystem, their beliefs are slowly depleting. The waters are dirty, and may beck e too toxic for the purifiers to take care of. Jobs will be lost, and there will be less money, which leads to another stock market crash. The whole works can be directly and indirectly effected by the unnatural change.