Pictures
No pictures for this dive
-
Temp: Surf 25°C Bottom 21°C
-
Dive type : Recreational
-
Visibility: Average
Water: Fresh
Recent Divers in Nordrhein-westfalen
Recent Pictures in Nordrhein-westfalen
Dive Shop & Buddies
Dive buddies:
Dennis Van Beek
Dive Profile
- 1. Air
- 10L Steel
200 → 50 bar
-
- Average depth: 4.7m
Data provided by EOL.org
Species Identified
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...
Read More
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.
Acipenser sturio Linnaeus, 1758 (Sturgeon)
Sturgeons are generally solitary, spending a number of years at sea before returning to the river where they were born, in order to breed in their turn. Entering the river in spring, mature individuals migrate upriver to t...
Read More
Sturgeons are generally solitary, spending a number of years at sea before returning to the river where they were born, in order to breed in their turn. Entering the river in spring, mature individuals migrate upriver to the shallow spawning grounds . Females can produce between 200,000 and 6 million eggs, which are sticky so that they can attach to the gravel substrate . Mature individuals do not eat throughout the spawning migration . As the juveniles grow they begin to migrate downstream, and adult fish spend about seven to eight years at sea before reaching sexual maturity . Sturgeon feed opportunistically on bottom dwelling creatures, feeling for prey amongst the mud with the sensitive barbels on their chin. Their food consists mainly of invertebrates and small fish .
Pungitius pungitius (Linnaeus, 1758) (Ninespine stickleback)
Found in shallow vegetated areas of lakes, ponds, and pools of sluggish streams; sometimes in open water over sand . Marine populations found near shore and move into fresh water to spawn . There appears to be seasonal m...
Read More
Found in shallow vegetated areas of lakes, ponds, and pools of sluggish streams; sometimes in open water over sand . Marine populations found near shore and move into fresh water to spawn . There appears to be seasonal movements inshore to shallow water in the spring for spawning, and, in the fall, offshore to deep water, or even to the less saline parts of the sea, by the young and adults that survive spawning . Nerito-pelagic . Feeds on small invertebrates; also on aquatic insects and their eggs and larvae . Eggs are found in nests constructed from plant material . Females grow faster and live longer than do other males . Males seldom live beyond age three, due to heavy post-spawning mortality, but females may live to age five or more . When abundant, it is preyed upon by other fishes ; also preyed by birds . May be used as human or dog food or as a source of oil .
Abramis brama (Linnaeus, 1758) (Carp bream)
Inhabit a wide variety of lakes and large to medium sized rivers. Most abundant in backwaters, lower parts of slow-flowing rivers, brackish estuaries and warm and shallow lakes . Adults occur usually in still and slow-ru...
Read More
Inhabit a wide variety of lakes and large to medium sized rivers. Most abundant in backwaters, lower parts of slow-flowing rivers, brackish estuaries and warm and shallow lakes . Adults occur usually in still and slow-running waters where they travel in large shoals . Larvae and juveniles live in still water bodies, feeding on plankton. One to two years old juveniles move from backwaters to river to feed. In the absence of opportunity to leave backwaters, juveniles may adapt but have a slower growth and attain maturity at a smaller size. They also drift to brackishwater estuaries to forage when water level of flooded areas drops in lower reaches of large rivers. Foraging juveniles in brackish waters stay in lower parts of rivers to overwinter in freshwater . Feed on insects, particularly chironomids, small crustaceans, mollusks and plants. Larger specimens may feed on small fish. Juveniles feed on zooplankton . Able to shift to particle feeding or even filter feeding at high zooplankton abundance. Usually spawns in backwaters, floodplains or lakes shores with dense vegetation . Can survive out of the water for extended periods . The flesh is bony, insipid and soft . Marketed fresh or frozen. Eaten steamed, broiled, fried and baked .
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...
Read More
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.
All the data in this dive will be erased (profile, notes, fish list...) and cannot be recovered. Are you sure?
You need to select at least one dive to import your dives in Diveboard.
This dive will be copied into your own logbook.
Please select which details you would like to keep.
This dive has been copied into your own logbook.
We are participating today in the startup contest Techcrunch Disrupt. Support Diveboard by voting for us!
All it takes is a click!
This popup will only show once. Don't forget to vote before closing it!
Eric Kuijt
Germany
Date: 2016-06-11 - 11:00
Max Depth: 7m Duration: 73mins
