Monday, November 28, 2011

Sea Kraits, Yellow Goatfish and White Trevally

The Sea Kraits

Sea kraits:

  • genus: Laticauda
  • species: colubrina
  • highly venomous, but rarely bites
  • up to 120 cm long
  • alternating blue/yellow and black stripes
  • return to land to mate
  • lay eggs
  • need to drink fresh water
Yellow goatfish:
  • genus: Mulloidichthys
  • species: martinicus
  • "whiskers" from chin to search for food through sediments
  • up to 39 cm long
  • hunts in schools in the day, alone at night
White trevally:
  • genus: Pseudocaranx
  • species: dentex
  • up to 1 m long
  • yellow fins
  • used in sushi

Sharkwater

What comes in mind when one hears the word "shark"?  For me, it would signal the beginning of the Jaws theme song.  You know, that low toned two-note repeats over and over again.  And then, in the danger of the music, I find myself thinking of the shark from the movie "Finding Nemo".  "Fish are friends, not food."  I think that is exactly what sharks are like.  If you don't bother them, they won't harm you in any way.  In fact, they are very misunderstood creatures.
During the documentary film "Sharkwater" that we watched in class (but I sadly missed out on), there was a black and white film teaching viewers how to protect themselves against shark attacks.  Although the PSA (if I may call it that) dealt with a serious matter.  I cannot help but laugh at their suggestions.  The advise that stood out most for me was to beat the water and make noise.  That got me thinking: "Wouldn't that just attract unnecessary attention?"  You began floating in the middle of the ocean peacefully and then you make yourself an easy target.  Why can we not treat sharks as any other fish?  Beautiful, graceful and harmless until you agitate it.
As for the matter of the shark fins ban.  I am glad they had enforced it.  Sharks do not deserve to be killed just for their fins, which is only 4% of their body weight.  Nothing should ever be killed unless there is a use for it and unless it is known that the impact would not be great.

Tuesday, November 8, 2011

Cellular Respiration Activity


Analysis:
  1.  Proceeding through each trial, my strength decreased.
  2. By the end of my trials, my fingers felt numb and my wrist had hurt for a period of time.
  3. Warming up my hand and fingers might cause me to get more squeezes.
  4. My non-dominant hand had less squeezes.  This might be because I don't use my left hand as much over my right and therefore it lacks strength.
  5. There was energy spent by the muscles squeezing the clothespin.  During rest, the energy used will be replenished.