that have been on the tees for a long time. historically, there has been very poor control of effluent discharge pollution basically being poured into the river. it was treated like an open sewer. we re trying to see how the crabs respond to pyridine, different amounts of pyridine, that s really important to understand, in their environment over three days. so it s trying to understand what the crabs do do they die, don t they die, do we see signs of stress? hello, gentlemen. welcome to my building. this is where we will be doing the experiment. don t go berserk thinking you can catch it! we have the animals
exactly what our fishermen have been saying. a single drop of pyridine in a litre of sea water, that is enough to kill half the population in three days. it is very poisonous. we still have some data to analyse, but the take home message is pyridine is very toxic to crabs. given the amount of pyridine that was recorded in the crabs that had died, i think we are starting to see that smoking gun. we found out that pyridine can do that to the crabs, but now we have to find out whether it was there, whether it was in the water. so it is ongoing. it is just the first steps really to finding the answers.
exposed to the chemicals, we gave him plenty of oxygen, we keep them happy, so in theory the only thing that might cause them any distress is the chemical that we are exposing them to. when we were seeing crabs that were dowdy, sleepy, so if you get a crab in that state, you will be able to tell then, won t you? we can look at their behaviour as well, we do regular observations in what they are doing. there may not be a single factor responsible, but to be fair, you have a system that is under stress, and it may only take one more stress to knock that system over. is pyridine, that extra stress? i m just waiting for that eureka moment. we expect to get our ist real meaningful data in a week s time. there is every possibility
toxic to crustaceans. there are no two ways about it. it was actually quite disturbing to find that we were finding a lot of the crabs were dead injust six hours. i was not quite expecting it to be quite so rapid, quite so striking. i d never have expected it to be saying it so matter of factly as that. we found that pyridine was very toxic to the crabs. even at quite low levels. it was really quite striking. we were getting big behavioural changes, very agitated crabs, would almost describe convulsions. and to the extent that they were almost doing somersaults. it will take a bit of sinking in. the symptoms you are talking about in the crabs, the rolling forward, acting drunk, that was
lots of industries use it, it is what we call a legacy pollutant, something that this historical and been used a long time back through industries like that stop. historically, there has been very poor control of effluent discharge, pollution basically being poured into the river. it was treated like an open sewer. we re trying to see how the crabs respond to pyridine, different amounts of pyridine, that s really important to understand, in their environment over three days. so it s trying to understand what the crabs do do they die, don t they die, do we see signs of stress? hello, gentlemen.