Basic Fish Morphology, Population Techniques and Growth

Outline of Lecture 8 Fish in Rivers - coping with flow

 Major Groups of Fish (see info on FISHWEB) (http://www.liv.ac.uk/~rickl/Fisheries_Web/ichthyology/teleosphyl.htm  Living in water is hard work, especially if it is flowing o Basic fish morphology and growth - a brief recap of relevant features o Body form and shape o Fins structure and position o Head and mouth morphology o Gills and rakers  Growth o Scales  Eating - some generalisations o Trophic Categories  A 'Fish centred view' of rivers  The factors in freshwater ecosystems which determine which fish species are present (in both rivers and lakes) o The general nature of rivers o Flow, oxygen and swimming  Introduction to the British Freshwater Fish fauna o British fish communities, guilds and associations

1. The major groups of fish 21. Influence of Gradient 2. Fish Anatomy and Biology 22. Flow of water 3. Body form and shape 23. Tributaries and catchment 4. Fins structure and position 24. Tidal effect 5. Head and Mouth morphology 25. General river profile 6. Gills and Rakers 26. Pools and riffles 7. Growth 27. Erosional zone 8. Scales 28. Types of fish 9. Intro to British Fish 29. Dominated by Salmon/trout 10. Salmon 30. Low energy areas within rivers (River 11. Trout morphology and flow regime) 12. Stone loach 31. Eddies and side channels 13. Bullhead 32. Eddies behind rocks 14. Grayling 33. Waterfalls 15. Barbel 34. Flow vs. Swimming 16. Minnow 35. Lowland Rivers 17. Eels 36. Depositional Zone 18. Trophic Categories 37. Gradient gentle 19. Influence of the Abiotic (physical) 38. Low Oxygen Environment on fishes from rivers and 39. Rithron & potamon streams 40. Fish Assemblages in the Rithron 20. Fish-eye view of a river

Reading: Re-Read Chapter 4 of Moss 1998, Especially 99-112 & 118-122 For refreshing your knowledge of basic fish biology try Bond (Ref below). Basic details of the Classification and evolution of fish : there are many different books in the Library, I like Vertebrate Life by McFarland et al., For further reading on the ecology of fish:, Wootons, (1990) The Ecology of Teleost Fishes (Chapman & Hall) is very good. Two copies are in the HCL, one in the short loan collection. Brief notes on the ecology and biology of some British Freshwater Fish on the FISHWEB website can be accessed via http://pcwww.liv.ac.uk/aquabiol/linkweb/

Bond CE. 1996 Biology of fishes Saunders College Pub, c1996. 2nd ed. HCL QL639.1.B71.2