. Bulletin of the Natural History Museum Zoology. FRESHWATER NEMATODES FROM LOCH NESS R. Ness 200m contour. Farigaig R. Foyers 200m contour Direction of flow 1. River Oich (RO) 2. Fort Augustus Bay (FA) 3. River Moriston (RM) 4. Deep South Basin (DSB) 5. River Foyers (RF) 6. Foyers Plateau (FP) 7. Deep North Basin (DNB) ** Activated sludge treatment * Significant septic tank input R. Tarff Fig. 1 Map of Loch Ness showing sampling stations. (1992 collection). Also, they have not been included in the ecologi- cal part of this study which is based entirely on the 1992-93 samples. Extraction and s
. Bulletin of the Natural History Museum Zoology. FRESHWATER NEMATODES FROM LOCH NESS R. Ness 200m contour. Farigaig R. Foyers 200m contour Direction of flow 1. River Oich (RO) 2. Fort Augustus Bay (FA) 3. River Moriston (RM) 4. Deep South Basin (DSB) 5. River Foyers (RF) 6. Foyers Plateau (FP) 7. Deep North Basin (DNB) ** Activated sludge treatment * Significant septic tank input R. Tarff Fig. 1 Map of Loch Ness showing sampling stations. (1992 collection). Also, they have not been included in the ecologi- cal part of this study which is based entirely on the 1992-93 samples. Extraction and slide preparation Nematodes were extracted by the Ludox centrifugation-floatation technique (Persmark et al., 1992). However, after extracting the first core it was found that the nematodes were still obscured by large amounts of organic matter of very similar density to that of the nematodes. In order to reduce sample sorting time, it was decided to subsample the remaining 1 cm core slices using the 'Asko sample splitter' Elmgren (1973). Two hundred nematodes were picked out from each core; if less than 200 nematodes were present in the first subsample, further subsamples were extracted until the required number was found. Extracted nematodes were then dehydrated to glycerine by the Seinhorst method (Seinhorst 1962).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Museum (London). Andover : Intercept
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