Migration of fishes

Barannikova, I.A. (1975). Functional Aspects Underlying Migration of Fish (In Russian). 210 pp. Nauka, Leningrad. 

Fontaine, M. (1948). On the role played by internal factors in certain migrations of fish. A critical study of different methods of investigation. Journal du Conseil Permanent International pour I Exploration de la Mer 15,284-294. 

Zusser, S.G. (1971). Diurnal Vertical Migrations of Fish (In Russian). Pishchevaya Promyshlennost, Moscow, 224 pp. 

Further direct evidence for orientation by chemoreception was provided by tagging fish from the above experiment with ultrasonic transmitters, and charting the reaction of treatment and control fish to plumes of morpholine in open lake waters (Scholz 1980). Morpholine imprinted fish always stopped swimming when they encountered a morpholine plume, and remained until it dissipated (0.5-0.4 h) they never stopped for plumes of other chemicals (PEA). In contrast, fish never exposed to morpholine (control) swam directly through plumes of morpholine without stopping (Scholz 1980). The author concluded that morpholine was responsible for guiding the migration of fish imprinted with this chemical to the morpholine scented stream. 

Another well-documented case of feral fish chronically exposed to mercury through the effluent of the chlor-alkali plant is the case of the Cinca tributary [64, 65]. Barbel and bleak were collected upstream (SI) and downstream (S2) a chlor-alkali plant located at Monzon (Fig. 3). It is important to point out that there is no physical barrier between SI and S2 to prevent fish upstream migration of suspicious contaminated fishes from S2. 

System 18. aquatic plants and their biological reactions, endemic diseases (XII) aquatic animals, including bentos, plankton, bottom sediment invertebrates, fishes, amphibians, mammals, vertebrates, their biological reactions and endemic diseases (VIII). Bioconcentration is the most typical and important consequence of biogeochemical migration of many chemical species in aquatic ecosystems. 

Fishes in Alpine floodplains are limited to cold stenothermic species such as the brown trout, and many alpine lakes are currently stocked to sustain the fishery. Water abstraction and flow regulation severely constrain the management of the fishery in Alpine waters today. The effects of climate change on the fishery are difficult to predict but could facilitate the upward migration of more cool water fishes in the future. The implications of these new fishes on aquatic food webs are not certain but could be substantial. 

Black, G. A. and Dempson, J. B. (1986). A test of the hypothesis of pheromone attraction in salmon migration. Environmental Biology of Fishes 15,229-235. 

Hansen, L. P., D0ving, K.B., and Jonsson, B. (1987). Migration of farmed adult Atlantic salmon with and without olfactory sense, released on the Norwegian cozst. Journal of Fish Biology 30,713-722. 

Sola, C. (1995). Chemoattraction of upstream migrating glass eels, Anguilla anguilla to organic earthy and green odorants. Environmental Biology of Fishes 43,179-185. 

In practice there is little evidence for the migration of PCBs from packaging (JFSSG, 1999a). There is considerably more evidence for the other two routes leading to PCBs in food. Indeed, historical trends can be drawn up for residues of PCBs in human fat, breast milk and fish. There has been a very gradual decline in levels of these organochlorine compounds in the environment, food and human tissues. This is entirely consistent with the persistence of these compounds. 

The lipid content of fish also indicates whether the fisherman should use lights to attract the fish (Gusar and Getmantsev, 1985), since this method of capture works only on fish with low reserves. It has in addition been used to predict migration time, routes, behaviour and distribution in fish from northern seas and deep-water oceanic areas, but the forecasts have been sporadic regular annual monitoring has been more common in fish from southern seas and those of the Far East. 

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