Fish migration

Hesslein, R.H., Capet, M.J., Fox, D.E. and Hallard, K.A. 1991 Stable isotopes of sulphur, carbon, and nitrogen as indicators of trophic level and fish migration in the lower Mackenzie River Basin, Canada. CanadianJoumal of Fisheries and Aquatic Science 48 2258-2265. 

Harden-Jones, F. R. (1968). Fish Migration. London Edward Arnold. 

Bematchez, L. and Dodson, J.J. (1987). Relationship between bioenergetics and behaviour in anadromous fish migrations. Canadian Journal of Fisheries and Aquatic Science 44,399-407. 

Deegan, L.A. (1993) Nutrient and energy transport between estuaries and coastal marine ecosystems by fish migration. Can. J. Fish. Aquat. Sci. 50, 74—79. 

Compared to N inputs, the internal loss terms of estuarine N-budgets are not as well documented. In general, internal losses include burial of PN in accreting sediment colunms and denitrification in either the water colunm or sediments (see also Devol, this volume). A few nutrient budgets have estimated N-extraction in the harvest of fish and shellfish biomass and fish migration from estuaries. 

Nutrient Transport by Fish Migration Many estuarine organisms can readily migrate between tidal creeks and the marsh platform and this migration can represent an appreciable flux of inorganic and organic N. Direct measurements of aquatic faunal... 

The temperatures of the northern Caribbean and extreme southeastern Gulf of Mexico have been predicted to increase 2.5-3.5°C during the next years [16]. Higher temperatures favor G. toxicus growth [17] and are likely to alter fish migration patterns. Ciguatera outbreaks have been correlated with sea-surface temperature increases in the south Pacific Ocean [18] and Tahiti [17],... 

Harden Jones FR (1968) Fish migration. Edward Arnold, London... 

Ueda H, Yamauchi K (1995) Biochemistry of fish migration. In Hochachka PW, Mommsen TP (eds) Biochemistry and molecular biology of fishes. Elsevier Science B.V, Amsterdam, pp 265-279... 

We dedicate this book to the memory of R. Jan F. Smith who died unexpectedly in the fall of 1998. Jan was a pioneer in the area of chemical communication, especially in the area of alarm signaling by fish. He also made basic contributions to the field of fish migration. An excellent review of Jan s ideas on alarm signals and their evolution appears as a chapter in this book. It is the last major review he wrote on this topic. Jan s enthusiastic and imaginative research resulted in many fundamental advances in our understanding of chemical communication and stimulated many students to pursue careers in our discipline. Jan will be sorely missed by friends, family, colleagues and the broader scientific community. 

While differences in the specific swimming patterns are dependent on the spatial distribution of the stimuli, all behaviors within the river are rheotropic responses. For a fish to discern the direction of the current flow, it must have some fixed reference feature (Arnold, 1974) In the river, this is accomplished by maintaining visual and tactile contact with the bottom. However, fish migrating in the open ocean and in the near-shore regions are not in contact with the physical boundaries of... 

Chemical signals are also involved in fish migration. Fish which, like eels, spawn in the sea and swim up rivers to feed and mature are called catadromous, whereas those, like salmons, which perform the reverse movement are called anadromous. 

BARAN E (2006) Fish migration triggers in the Lower Mekong Basin and other tropical freshwater systems, MRC Technical Paper No. 14. Vientiane Mekong River Commission. 

HARRIS J H (1984) Impoundment of coastal drainages of south-eastern Australia, and a review of its relevance to fish migrations, Aitsfra/ion Zoologist, 21,235-250. 

For a short distance downstream from the power plant, the water is unnaturally warm, which means it maybe depleted of dissolved O. Fish that are trying to migrate upstream to spawn may be unable to swim through such warm water. A warm section of river can be as much of a barrier to fish migration as a dam is. 

The solution is to build a channel for the fish that bypasses the power plant. It is a solution similar to the one often used when a dam is blocking fish migration. In that case heat is not the problem (falling water is spinning the turbines, not steam) the problem is that the fish cannot swim over the barrier posed by the dam. A fish ladder is built to bypass the dam. A fish ladder consists of a number of very small increases in elevation that fish are capable of jumping. 

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