Posts Tagged ‘Klingavälsån’

An aquaria room full of fish and mussels 18/06/2012

Written by lea on . Posted in Musslans värdfisk

After a successful week of electrofishing in Bråån and Tommarpsån four weeks ago, Laura and I started to prepare an aquaria room at Lunds University for an initial fish-infestation experiment. Cleaning aquaria, buying and arranging equipment or settling up oxygen-pipes were some of our tasks for the week.

This let us continue with a second successful electrofishing-action with Niklas afterwards. With a car full of fish many different species were transported from Klingavälsån and Fyleån to the aquaria room in Lund at several chargings.  Four different fish species were caught in Fyleån, ten in Klingavälsån directly at Hemmerstorps Mölla. What a positive surprise! Bullheads (Cottus gobio) and three-spined sticklebacks (Gasterosteus aculeatus) occurred in both streams, brown trout (Salmo trutta) and minnow (Phoxinus phoxinus) in Fyleån. Roach (Rutilus rutilus), silver bream (Abramis bjoerkna), perch (Perca fluviatilis), stone loach (Barbatula barbatula), common bleak (Alburnus alburnus), pike (Esox Lucius), tench (Tinca tinca) and nine-spined stickleback (Pungitus pungitus) were caught in Klingavälsån. The latter mentioned species were only a few individuals each, but still interesting for testing host-fish suitability. At the end of the week Niklas found 15 gravid mussels in Bråån which we finally transported to the lab.

Since bringing the animals in the aquaria room the tension has been increasing every new morning hoping that all fishes and mussels survived the night. A few bullheads died because of fungal infections, but the general situation is stable now. It was possible to count all fishes and to check their gills for ongoing infestation by mussel glochidia. This was a great balance between anesthetizing baths and fast but still thoroughly looking at the gills with further waking up baths. Between checking the mussels for glochidia release and regularly changing the water, fishes were fed and aquaria were cleaned. It was great to have Deplhine’s help during the week which made it possible to work effectively. Thanks a lot! Many fishes in a small and cold room bring along a lot of work. We now hope to get enough ripe glochidia for starting the experiment. If not, we’ll try with further mussels ;).

Kartläggning av värdfisk 21-24/05/2012

Written by martin on . Posted in Musslans värdfisk

LEA&LAURA

Fisket efter musslans värdfiskar startade på allvar i slutet av maj. Vi elfiskade i Bråån, där det kryllade av elritsor, men vi fick även grönling, öring, nejonöga och ål. Vi fiskade också i Tommarpsån, där stensimpor dominerade stort i antal, men där vi även fisk en del elritsa. Vi återkommer till dessa vattendrag vid två tillfällen till under sommaren, samt placerar ut mjärdar och ryssjor för att försöka fånga ytterligare potentiella värdfiskar. Analyser av hur många glochidielarver som infekterar dessa fiskar samt vilka musselarter som infekterar beräknas starta i höst.

Martin

Snorkeling in Klingavälsån ?! 21/05/2012

Written by admin on . Posted in Klingavälsån, Studier

SNORK

A snorkeling afternoon in Klingavälsån…

The water was so high that Marie and I couldn’t use the viewing-buckets as we used to ! so we asked for HELP.

Léa who is use to dive has gently accepted to help us and look for mussel a bit deeper in the river. She usually dive in lake but she tried in the river with us. In despite of the water current it actually worked well and fast! We started with the most important part which are going to be remeander and unfortunatly we just found few Anondonta cygnea and shells… Then we went near the nature reserve and after a while…. we started to find some mussels ! but Léa was exhausted after several hours in the water (quite understandable!!) so we just quite at this time and we’ll come an other time to check out what kind of surprise we could find 🙂

Coming soon with some news !

/Delphine

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