eRodent > The Garden Pond Page > March 2002. |
Please be patient if this page takes a little while to load as I have put fairly high quality photographs on it.
Well spring is finally here. There are signs of life in the pond again. The marsh marigold is starting to sprout and the water Hawthorne has several leaves floating already and by mid month had a flower on it. On the 16th there were honey bees buzzing around the skimmia. The photo below was taken at about 6.30am in the morning on March 12th when I had to get up early to catch a train to London (urgh!).
We also have frog spawn! There were lots of frog pairs on the weekend of the 9th/10th March and at the time of writing (12th) there are at least 4 lots and probably a lot more. I decided that I was probably safe to take half of one lot out to raise in a tank. I had to a bit of I think about this as wildlife should generally be left completely alone. You certainly should never take frog spawn from a wild pond. I decided in the end that as the survival rate of the small amount of spawn would be much higher than that in the pond and I was intending to release them exactly where they were found, it would be ok.
Here is my setup with the frog spawn on day 1. As you can see I put gravel and oxygenating weed in a tank with water that I got from the water butt (as the chlorine in tap water could be harmful). To stop the water going green and to feed the tadpoles later on I put in a bag of daphnia from the local fish shop.
The frog spawn was already starting to change when I got in on the evening of day 2 (after the previously mentioned yuck trip to London). By the time there was enough light to photograph it again, on the morning of the 3rd day, you can already see that it is turning into little tadpoles.
There was about 10 lots of frog spawn in the pond at this point.
The frog spawn is growing at an amazing speed. By the evening of the 3rd day it had started to move and by the Morning of day 4 - tadpoles! Many of them had broken out of their eggs and were hanging onto the side of the spawn. I believe that they spend the first day or two there eating the remaining spawn before moving away in search of more food. You can also see that the odd one or two eggs not developed which is quite interesting. Perhaps this is due to genetic faults in the DNA of these eggs. I've also noticed that the number of oxygen bubbles has gone down a lot. Maybe the tadpoles are using the oxygen so that there isn't enough to form into bubbles. By this morning (14th March) there were at least 12 visible lots of frog spawn in the pond. Good job it's a good big pond...
(You wouldn't believe how many photos it takes to get one like this!)
Do you like this page? Is it useful? Please email me and let me know. I would like to hear from other people who are mad enough to raise frog spawn in their spare bedroom!! I get a lot of spam so put something about tadpoles in the title so I can spot people's emails!!
I reduced the quality of these photos so that they are quick to download but if you would like good quality copies please feel free to ask.
Back to Main Page |