NaPoWriMo 3/30

The prompt for today, the third day of NaPoWriMo, is to write a poem in celebration of the wedding, which turns out has its own special word, of course, that even my scientifically oriented mouth had difficulty pronouncing. For this reason alone, and not because I dislike marriage, I am going on my own today and will instead be writing about the first topic or headline I stumble upon, which incidentally turns out to be Darwin's Legacy. In reality this is the title of a series of free lectures from Stanford available on youtube, click on the above link if you are interested checking it out. 

A recently discovered symbiotic relationship and a wonderful example of coevolution; green algae cells provide oxygen to developing salamander embryo. http://www.popsci.com/science/article/2011-04/algae-live-inside-developing-salamanders-cells-scientists-find

  
And now without further procrastination, I present...a poem:

Darwin's Legacy

Thirteen species of finches 
Fly around in my head
Their beaks, 
Their beaks torment me 
In my sleep they are pecking and pinching
Pulling and plucking seeds of various sizes
From my cracks and crevices, 
My eyes and fingers burn with their guano
And would you believe I have been living for the last year 
Off  of  seaweed, pre-digested in the gut of a pink iguana?


Oh, the tangled bank is thick
So rife with hierarchical complexity 
And Darwin sailed on the Beagle straight through it
Plowing onwards through the origin of species
A single common ancestor, gone explode
Broken apart like Pangea over evolutionary time
The scatterings of diversity
Arising.

Thoughts on Sex

Flowers are the sex organs of plants.

Mushrooms are the sexual structures of fungi

Spring is all about sex. Sex. Sexual reproduction is a topic that quite interests me because it is a relatively novel idea in the scheme of evolutionarily time, and one that can really get people riled, or get their panties in a bunch, which makes it even that much more fun to think about, because topics that cause people to get uncomfortable are often places where more inquiry, critical questioning and  understanding are needed.

3-spine stickleback--Gasterosteus aculeatus

Modes and methods of sexual reproduction are broad and diverse and often times species specific. The picture on the right is of a three spine stickleback fish. Courtship and mating behavior for this fish involves numerous aspects including the development of bright red nuptial coloration in the males. Male fish in this species are responsible for making a nest and attracting the female to lay her eggs inside, where by the male can then fertilize them. After fertilization, the eggs are tended to solely by the male. So for this species, we have a male, striving to have any female respond to his nuptial colors such that she might drop her eggs in his nest for him to fertilize, and then she leaves, and he painstakingly tends to the eggs himself, until they hatch. 

When you start to look into it, you begin to realize that reproductive strategies and mating behaviors are extremely diverse within and across taxa. I'm sure everyone has heard gruesome tales of the sex lives of some spiders, and many other insects, where after mating the female ingests the male getting extra nutrients to ensure the success of their off-spring. 

But, who knew that the Indonesian Octopus, Abdopus aculeatus had such an entertaining and dramatic sex life? Read all about it here: http://evolution.berkeley.edu/evolibrary/news/080501_octopusmating. What is up with the deep sea angler fish? Watch this short video from Animal Planet I found on YouTube about angler fish mating customs for insight into that bizarre strategy. And how is it that we are just now learning about the twisted, quite literally, reproductive strategies of ducks?

For more information on the evolution of sex and the diversity of reproductive strategies amongst plants and animals, I recommend reading the review Evolution and Sexuality: Bilogy and Behavior, by Gregory G. Dimijian, MD. available on the NCBI Database:


http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1200732/pdf/bumc0018-0244.pdf