Friday, November 30, 2007
Wednesday, November 21, 2007
These are Harlequin bugs, or Harlequin cabbage beetles (Murgantia histrionica). They live by sucking the juices out of cabbages and other cabbage family members. Most of the time they are considered a pest by farmers. They are part of the stinkbug family, although they also play dead when disturbed.
The females lay up to 12 eggs in a double line on the leaves…
After hatching, the young (nymphs) cannot fly. They will go through 5 successive molts before they get the color patterns and the wings of an adult. That takes approximately 42-47 days.They are very dependant on temperature conditions for their growth and development.In northern areas, they only have one clutch per year. In southern areas they can have three clutches. When mating the male and female stand with their abdomens touching, for the transfer of sperm.
These bug pictures were all taken on one Bladderpod bush, a native bush to California. Some harlequin bugs will spend their entire lives on a single bush.
Sunday, November 18, 2007
I want to do a post on some of the cool talks I heard at the meeting I went to last week, and I will soon. I just need to finish the results section of my thesis and get back on track with grading. That is so enjoyable. After all, "the results showed that higher temperatures did not decrease the population growth, instead slowed it down from growing".
However, in all fairness, my writing probably distresses my advisor to a similar degree!
Thursday, November 8, 2007
Tuesday, November 6, 2007
Its name comes from its tendancy to form large groups (hundreds) of crabs which then march down the beach. I’ve heard tell that the larger crabs ‘direct’ the movement (i.e. smaller crabs follow them) earning them the nickname of general crabs, but I have yet to find some verification of this. When disturbed, the crabs corkscrew into the sand on their side.
Saturday, November 3, 2007
Thursday, November 1, 2007
This means that the mothers gave up to 4 times the amount of energy needed to undergo metamorphosis to their young!