Category Archives: Sanday

Alevins, General info, Sanday

All ova hatched on Sanday (at last…)

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When the first ova hatched at the Sanday mini-hatchery 10 days ago, we were looking forward to seeing the bottom of the tank crawling with the transluscent pinky-orange alevins within a matter of hours or days. However, we’ve had to wait until today to discover that all the eggs (apart from maybe a dozen) had hatched over the week-end. Now (and some people are going to be disappointed when reading this ;-)), after very close inspection, I still couldn’t spot Trevor TT nor Tilly TTT who seem to have disappeared into the crowd… 

The great news is that most our ova have made it and that hopefully, we’ll be able to release about 280 alevins into Bea Loch in a few weeks.

Mr. Pietri

Sanday one day-old alevin and egg case (click on picture to magnify)
Alevins, Sanday

Hatching has started on Sanday!

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Day-old brown trout alevin (17/02/12)

Sanday’s underway, only 2 or 3 days after Stronsay and Kirkwall Grammar. Only a few alevins had hatched by this morning, including the star of the show: Trevor the Trout (named by Kacey, Sam and Dennis) and easily recognisable with his orange yolk-sac and golden eyes ;-)…

These little guys will have a peaceful long week-end and by Tuesday, when we remove the mesh frame, we should see Trevor’s brothers and sisters crawling amongst the gravel.

ova / eggs, Sanday

The Sanday eggs are eyeing up!

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The Sanday ova starting to "eye up" (07/02/2012)

 http://vimeo.com/37239001

That’s it ! The eyes are now clearly visible on the Sanday eggs! From now on, it should be really interesting to follow the growth of the embryos and in a couple of weeks, look for any sign of foam on the sides of the tank: a light foam is the result of enzymes breaking down the eggs as they hatch. By the time you’re back from your mid-term break next Monday, I’m sure we’ll notice a big difference with the ova.

Mr. P

ova / eggs, Sanday

Sanday’s ova are doing well!

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Sanday pupils removing a dead ovum

After travelling on the plane in a thermos flask last Tuesday, the ova at the Sanday school are doing very well! There were  5 casualties on the first day and only another 2 since then, which leaves us with about 270 eggs to look after!

The pupils have been checking the set-up on a daily basis,  making sure the pump is working and that no dead eggs are left at the bottom of the tank, to prevent any fungal growth.

Keep up the good work!

Mr.P