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SESSION III. Ecological Responses to River Regulation: Macroinvertebrates and Fish. <br />(Convener -Professor James V. Ward) <br />1:25 Introductory Remarks <br />1:30 The effects of river-bed restructuring in fish and benthic communities of a <br />4th-order stream (Melk, Austria). M. Jungwirth, O. Moog and S. <br />Muhar. <br />1:45 Population dynamics of freshwater Indian carps in the lower reach of the <br />Brahmaputra River, Assam. M. Choudhery and M. Karthikeyan. <br />2:00 Fishways and migrations of grayling (Thymallus thymallus L.) and <br />landlocked brown trout (Salmo trutta L.) in river Glomma, Eastern <br />Norway. A. Linlokken. <br />2:15 Changes of fish community patterns induced by river regulation in a semi- <br />arid catchment (SE-SPAIN). M. Torralva and M.A. Puig. <br />2:30 Spatial interrelationship and trophic overlap in the fish fauna of a regulated <br />river. G. Brun, A. Champeau, and R. Chappaz. <br />2:45 Evaluation of downstream effects caused by a new reservoir comparing the <br />fluvial communities before and after its construction. Diego Garcia <br />de Jalon and P.S. Fernaadez. <br />3:00 BREAK <br />3:30 Response of native fish habitat to hydrodam peaking power releases in the <br />Colorado River. R.A. Valdez. <br />3:45 Fishbiological investigations of a Danube impoundment (Altenworth, <br />Austria). H.G. Waidbacher. <br />4:00 Stocking versus natural recruitment in Atlantic salmon (Salmo salar L.) and <br />brown trout (Salmo trutta L.): the significance of reduced stocking <br />in the river Laerdalseva, Western Norway. S.J. Saltveit. <br />4:15 Juvenile competitive bottleneck in the production of brown trout in <br />hydroelectric reservoirs due to intraspecific habitat segregation. <br />O. Hegge, T. Hesthagen, and J. Skurdal. <br />