Because loach are small fishes and because they are seldom fished for they are rarely featured in angling books or discussed in the angling press. Diminutive they may be but they do not serves this neglect.
A little like me when I know to tread carefully around the Wife, so sensitive are loach to changes in atmospheric pressure that by means of their restless behaviour (it is claimed) they can give up to 24 hours notice of an approaching thunderstorm.
Now this sensitivity to atmospheric pressure probably is linked to changes in the amount of dissolved oxygen caused by changes in pressure, maybe be the key to the loach's behaviour, but it is not the whole story.
You see uniquely in the physiology of British fishes, a loach uses its intestine as an auxiliary organ of the respiration. Experiments have shown that when the loach dashes to the surface to take in a bubble of air, the air so taken is changed just as if it had been breathed.
Intestinal respiration has evolved in the loach to enable it to survive in stagnant pools, in over-warmed pools and even in nearly dried-up pools. Now the Stone Loach which has been one of my targets on rod and line for a while (yes really) as its name implies, is one found during daylight hours, hiding under stones. It has six barbules, two long and four short, or 'beards' as its specific name barbatula refers to.
The stone loach is nocturnal in habitat, only leaving the shelter of stones or weed to forage after dark, which is why they are seldom caught other than very dull days. Not surprisingly, therefore the loach are of small interest to the angler, except as competitors with the young of other species for food, and as food for larger species.
Loach, minnow and sticklebacks were all we could catch on one of my local small rivers when I was a kid. Also used to have some ‘weather loach’ in a tank which were no doubt the same species.
ReplyDeleteNice read, good look with those barbel.
I've never even seen a loach Darren, well I don't think so anyway, been one of my targets on rod and line for a while, I'll keep plugging away !!
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