Aquatic Oligochaete Biology by W. J. Harman (auth.), Ralph O. Brinkhurst, David G. Cook

By W. J. Harman (auth.), Ralph O. Brinkhurst, David G. Cook (eds.)

After a few conversations with Professor Dr. H. Caspers and different individuals on the triennial congress of the foreign organization of Theoretical and utilized Limnology (S. I. L. ) held in Copenhagen, Denmark (1977), the senior editor approached the overseas delegates on the enterprise assembly for approval of the idea that of retaining the 1st foreign Symposium on Aquatic Oligochaete Biology at Sidney (near Victoria) British Columbia on could 1-4, 1979. The S. I. L. agreed to sponsor this type of assembly, and this sponsorship in flip resulted in the availability of area and technical amenities on the Institute of Ocean Sciences Patricia Bay, the Pacific nearby headquarters of the sea and Aquatic Sciences part of the federal Fisheri~s and Oceans division. The nationwide study Council of Canada supplied trip aid for a few non-Canadian contributors. invites have been despatched to as many energetic employees within the box because the senior editor might identify, and also representatives of heavily allied fields have been invited - Dr. V. Standen who works with heavily comparable yet terrestrial species, and Dr. J. Grassle who works with polychaetes yet specially with Capitella capitata that is very like an oligochaete in a few points of its biolog- rather a lot in order that the senior editor in his salad days succumbed to a few ill-founded suggestion and defined Capitella as a brand new marine tubificid! The addition of those "outside" affects avoided the gang from creating a variety of unfounded assumptions in the course of discussions, and supplied useful cross-linkages.

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Micros. , 1979a, Coralliodrilus leviatriatus gen. , a marine tubificid (Oligochaeta) from Bermuda, Sarsia, 64:179182. , 1979b, Re-examination of the marine genus Spiridion Kno11ner (Oligochaeta, Tubificidae), Sarsia, 64:183-187. , and P. Lasserre, 1976, Taxonomic status and geographic variation of the marine enchytraeid genus Grania Southern (Oligochaeta), Zool. , 5:121-132. , and P. Lasserre:-1977, Redescription of Grania rnonochaeta (Michaelsen), a marine enchytraeid (Oligochaeta) from South Georgia (SW Atlantic), Zool.

Birtwistle, L. Carey, A. Fug~re, R. Cross, C. Lanyon-Duncan and M. Philbin-Munson. , 1973, Reproduction and larval morphology of five Zool. , Ophryotrocha species (Polychaeta, Dorvilleidae). 2:145-155. , 1978, A new Ophryotrocha species of the labronica group (Poly chaeta , Dorv1lleidae) revealed in crossbreeding experiments. In: Marine Organisms, B. Battaglia and J. , Plenum Publishing Corpcration, New York, pp 573-590. , 1977, Slow recolonization of deep-sea sediment. Nature,265:6l8-6l9. P. Grassle, 1974, Opportunistic life histories and genetic systems in marine benthic polychaetes.

Multivariate discriminant analysis was also used to further test the separation of L. spiralis and L. hoffmeisteri (variant) from the typical forms. Results indicate that L. hoffmeisteri (variant) is indeed an ecomorph of L. hoffmeisteri, and L. spiralis exhibits characteristics of both L. hoffmeisteri and L. claparedeianus but is also most likely an ecomorph of L. hoffmeisteri. INTRODUCTION Species of Limnodrilus are distinguished primarily by the shape of the penis tube and the configuration of the head at the distal end of the tube.

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