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Temp: Surf 20°C Bottom 17°C
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Dive type : Recreational
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Visibility: Bad
Water: Fresh
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Data provided by EOL.org
Species Identified
Silurus glanis Linnaeus, 1758 (Catfish)
Inhabits large and medium size lowland rivers, backwaters and well vegetated lakes . Occurs mainly in large lakes and rivers, though occasionally enters brackish water in the Baltic and Black Seas . Found in deep waters ...
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Inhabits large and medium size lowland rivers, backwaters and well vegetated lakes . Occurs mainly in large lakes and rivers, though occasionally enters brackish water in the Baltic and Black Seas . Found in deep waters of dams constructed on the lower reaches of rivers . A nocturnal predator, foraging near bottom and in water column. Larvae and juveniles are benthic, feeding on a wide variety of invertebrates and fish. Adults prey on fish and other aquatic vertebrates. Attains first sexual maturity at 2-3 years of age . Spawns in the salt water of the Aral Sea . Marketed fresh, canned and frozen; can be pan-fried and baked . Locally threatened due to river regulation destroying shallow spawning sites .
Rutilus rutilus (Linnaeus, 1758) (roach)
Roach feed on both animal matter and vegetation, principal foods being insect larvae, small molluscs and waterweed. They are tolerant of poor water conditions, even polluted water low in oxygen. The fish spawn from April t...
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Roach feed on both animal matter and vegetation, principal foods being insect larvae, small molluscs and waterweed. They are tolerant of poor water conditions, even polluted water low in oxygen. The fish spawn from April to June in shallow water and attach their eggs – as many as 100,000 – to stones and plants. These hatch within four to 10 days, the fish larvae remaining attached to the vegetation until they have exhausted their yolk sacs. The young roach remain in shallow water and grow slowly, the males reaching maturity at two years, the females at three. Although used as a source of cheap food in some eastern parts of its range, the roach is known primarily as a sport-fish. Its sheer abundance and ability to tolerate poor quality water means that it one of the most common fish caught by anglers. The fish's natural predators include pike, eels and other large carnivorous fish, herons, osprey and aquatic mammals such as mink and otter.
Perca fluviatilis Linnaeus, 1758 (European perch)
Perch live in schools, often mixing with other species of fish, usually in the top 50 metres of water. Spawning takes place in April, the very sticky eggs being produced in bands. Females twine these bands around submerged...
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Perch live in schools, often mixing with other species of fish, usually in the top 50 metres of water. Spawning takes place in April, the very sticky eggs being produced in bands. Females twine these bands around submerged vegetation or among rocks while the males follow her and fertilise the eggs. The young fish hatch after about three weeks and remain amongst the egg bands until the yoke sac is exhausted. They then venture into more open water and feed on planktonic animals. As they grow they begin to shoal together close to the bank. Males mature when they reach the length of 7 – 8 cm, females when they are 10 cm.
Esox lucius Linnaeus, 1758 (American pike)
Pike spawn from the end of March to the beginning of May, usually in quite shallow water and often using the same places year after year. The spawning process can last several weeks and the number of eggs varies with the a...
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Pike spawn from the end of March to the beginning of May, usually in quite shallow water and often using the same places year after year. The spawning process can last several weeks and the number of eggs varies with the age and size of the female. A large fish may produce as many as half a million eggs. The eggs are sticky and adhere to plants, the young pike hatching after 10 – 15 days. At this stage they have no proper mouthparts and remain attached to the plants until the yoke sac is consumed. Once the young fish become free-swimming, they feed mainly on small organisms, but once they reach a length of 5 cm, they begin preying on other fish larvae and tadpoles. Once they have survived these early stages, pike grow fast, sometimes reaching a weight of one kilogram in the space of three years. Males mature at the age of two, females at four years. Pike catch their food largely by stealth and lightning-fast acceleration, taking their prey unawares. A large adult pike will eat roach, rudd, dace and perch, trout and salmon, and even other members of their own species. They will also take frogs, newts, crayfish and they have been known to catch ducklings and small mammals.
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Belgium
Date: 2013-08-14 - 21:00
Max Depth: 9.2m Duration: 70mins
Dive buddies:
Proud Dady,
Tom Demeester
