Thursday, 25 March 2010

More males than females ?

Morning!

I finally managed to replace our outside light yesterday.  We are now minus a large bush which had to be chopped down for us to get the ladder up against the wall.  It was too big, anyway!  Did I say 'us'?  I meant 'Me' - husband had no part in it and anyway was too busy working hard to pay for all the birdseed we get through!  Anyway, with a new bulb fitted at last, I could take a ring-side seat last night with a cup of tea and watch the show from my patio door.  There was a lot of froggy activity and much croaking though they are still quite skittish about me going closer so I didn't get much in the way of photographs.

Several more clumps of frogspawn arrived during the night.  Out of curiosity, does anyone know if there's a collective noun for a 'clump' of frogspawn??? 

Within the pond there are several groups of 3 frogs - 2 males clasped tightly around 1 female.  Does this suggest a lack of females, I wonder?  Or perhaps this is a better way for nature to ensure a continuation of the species:  with a ratio of 2 males to 1 female, the eggs are almost guaranteed to be fertilized.

I see there are several single frogs still not paired up but I don't know if these are males or females.

It was interesting to read the article about the use of the pesticide, Atrazine, mentioned in one of my earlier posts.  http://frogblog2010.blogspot.com/2010/03/common-pesticide-identified-as-major.html   The apparently world-wide use of this pesticide can reduce the testosterone in male frogs, changing them into females.  They can then mate with male frogs and produce eggs, but because they are still genetically male all their resulting offspring are males.  M + M = M.  I need to read the article again and the response by the company that produces it.

Mild and damp again.  Temp at 10am is

Ttfn A  :o)



 

1 comment:

  1. Bird seed? It's the frequent and regular deliveries of mealworms (by courier) throughout the year that are bankrupting me! Still, it's been good to have robins flying through the letter box for them for the last 3 or 4 years and a female blackbird who's been taking them from our hands throughout that period!

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