The larvae of Halocladius (Halocladius) variabilis (Diptera: Chironomidae) from the fouling assemblages on wooden test panels submerged in Trondheimsfjorden, Norway
Santhakumaran, L.N.; Sneli, J.-A.; Sundnes, G. (1984). The larvae of Halocladius (Halocladius) variabilis (Diptera: Chironomidae) from the fouling assemblages on wooden test panels submerged in Trondheimsfjorden, Norway. Sarsia 69(3-4): 155-158
In: Sarsia. University of Bergen. Universitetsforlaget: Bergen. ISSN 0036-4827; e-ISSN 1503-1128, meer
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| Trefwoorden |
Aquatic organisms > Fouling organisms
Biological settlement
Developmental stages > Larvae > Invertebrate larvae > Insect larvae
Fauna > Aquatic organisms > Aquatic animals > Aquatic insects
Materials > Wood
Halocladius Hirvenoja, 1973 [WoRMS]
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| Auteurs | | Top |
- Santhakumaran, L.N.
- Sneli, J.-A., meer
- Sundnes, G.
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| Abstract |
For the first time in Norway the occurrence of chironomid larvae and pupae of Halocladius (Halocladius) variabilis has been recorded from timber test panels exposed for varying periods in Trondheimsfjorden (western Norway) during 1977-78, at depths ranging from 1.5 to 10 m at low tide. Settlement was observed throughout the year. The larvae were present among a variety of fouling communities ranging from a thin film of algae and silt to extremely heavy settlement of coelenterates, serpulids, barnacles, bivalves, bryozoans, ascidians, or algae together with a thick layer of silt and faeces of polychaetes, ascidians, and wood-borers. The larvae made their tubes either in shallow grooves on the timber surface or in the angle between the upturned edges of bryozoan colonies and the wood surface. Larvae and pupae even settled on panels pressure-treated with creosote and Boliden salt. The larvae were unaffected when placed in distilled water and could withstand salinities as high as 70.5 ppt when transferred directly from distilled water and 97.0 ppt after acclimation. |
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