Great Britain

Britain's freshwater fishes by Mark Everard

By Mark Everard

Britain hosts a range of freshwater environments, from torrential hill streams and lowland rivers to lakes and reservoirs, ponds and canals, and ditches and estuaries. Britain's Freshwater Fishes covers greater than 50 species of freshwater and brackish fish present in those waters. This fantastically illustrated consultant positive factors in-the-hand and in-the-water photos all through, and obtainable and informative overviews of subject matters reminiscent of fish biology and existence cycles. designated species money owed describe key identity positive aspects, with details on prestige, measurement and weight, habitat, ecology, and conservation. The ebook additionally contains a thesaurus and recommendations for additional reading.

This easy-to-use box advisor might be necessary to someone attracted to Britain's freshwater fish existence, from naturalists and teachers to scholars and anglers.

  • Covers all of Britain's freshwater fishes
  • Features attractive images all through
  • Includes distinctive details on greater than 50 species, the locations they inhabit, and their roles in Britain's ecosystems
  • Attractively designed and simple to use

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Base of first spine of dorsal fin set back 2–3 scale columns relative to the ventral fins. See table on pages 52–53 for details. ■ ■ open areas of water, where they feed at and just below the surface. Conservation: In addition to good water quality, Rudd require a variety of aquatic habitats if they are to thrive. This provides a diversity of food items and, as with the Roach, good habitat complexity enables them to evade predators and increases the availability of food-rich warm water where young fish can maximise their rate of growth in the summer.

This relationship changes little over the lifetime of the fish. Large eye size is an additional defining characteristic that sets the Silver Bream apart from the Common Bream (page 60), and all other European cyprinids apart from Bleak (page 76). Silver Bream is known rarely to hybridize with Common Bream, Roach (page 55) and sometimes Rudd (page 54), the hybrids possessing characteristics that are intermediate between the parent species. Hybridization occurs most often where the spawning habitat is suboptimal and shoals of the different species are forced to spawn in the same location.

Microorganisms may comprise a substantial component of detritus, meaning that some fish (such as Roach), as well as many invertebrates, utilise it as food. The dorsal fin, or fins, is (or are) located on the back of the fish (see page 22). Whilst some fish families can have three dorsal fins, the British freshwater fishes have either one or two (excluding the fatty ‘adipose fin’ of the salmonids), the front one containing more spines and the rear one supported by soft rays. Dorsal fins are not paired, provide vertical stabilization and assist in turns and stops.

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