A Review of Pikeperch (Stizostedion lucioperca), Eurasian Perch (Perca fluviatilis), and Ruff (Gymnocephalus cernua) in Finland

1977 ◽  
Vol 34 (10) ◽  
pp. 1684-1695 ◽  
Author(s):  
Esko A. Lind
Keyword(s):  
Brackish Water ◽  
Perca Fluviatilis ◽  
Environmental Toxins ◽  
Large Area ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis ◽  
Color Yield ◽  
Cadmium Lead ◽  
Distribution Water ◽  
Stizostedion Lucioperca

Three percids occur in Finland: the Eurasian perch (Perca fluviatilis), the pikeperch (Stizostedion lucioperca), and the ruff (Gymnocephalus cernua). Perch occur throughout Finland, whereas ruff and pikeperch show a more southerly distribution. The pikeperch prefers lakes of medium or large area and the perch small lakes. A negative correlation was found between the size of the population of the perch and the number of fish species present. The growth rate for all species is higher in brackish water than in freshwater, and also has been higher in recent than earlier years.The correlation between the intensity of color of the water and the percentage of predaceous fish in catches, perch and pikeperch included, is negative. Perch lived longer in ponds with dark water than in those with clear and eutrophic waters. Ruff and small perch are typically prey species, while the pikeperch is a major predator.The environmental toxins cadmium, lead, DDT, and PCBs were found in only slight concentrations in percids. Highest concentrations of mercury were found in fish taken from waters near the main sites of the cellulose industry. Concentrations in the percids have decreased since 1968 due to the reduction in mercury output.Catches of pikeperch from freshwater showed a decrease and those from brackish water an increase during 1953–73. Perch catches have increased. Key words: Percidae, Finnish percids, Stizostedion, Perca, Gymnocephalus, life history, environmental toxins, heavy metals, distribution, water color, yield

Changes in Fish Community of Klíčava Reservoir with Particular Reference to Eurasian Perch (Perca fluviatilis), 1957–72

1977 ◽  
Vol 34 (10) ◽  
pp. 1734-1747 ◽  
Author(s):  
Juraj Holčík
Keyword(s):  
Fish Community ◽  
Fish Fauna ◽  
Perca Fluviatilis ◽  
Northern Pike ◽  
Zooplankton Biomass ◽  
Fish Biomass ◽  
Biomass Density ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis ◽  
Stizostedion Lucioperca

Soon after the 1955 filling of the 60 ha mesotrophic Klíčava Reservoir in Czechoslovakia, the fish fauna started to change. Generally, lithophils were replaced by phytophils and then by ecologically more plastic species. Fish biomass increased in the first 12 yr from 65 to 236 kg/ha, but after 1967 dropped to about 170 kg/ha. Increased biomass and density of piscivores were responsible for the decline. Among the piscivores the most important role was played by the pikeperch (Stizostedion lucioperca) rather than the Eurasian perch (Perca fluviatilis) or northern pike (Esox lucius). Cyclical changes in the age structure of the perch population and the periodical occurrence of many young resulted from fluctuations in the rate of cannibalism, which affected the density of the fry and yearlings. A decline in zooplankton biomass and disappearance of larger zooplankters in the first 5–6 yr of the reservoir were due to increased density of fish, especially perch, which fed on zooplankton. Synchronous predation by piscivores and zooplanktivores produced a nearly stable zooplankton biomass in the later years of the reservoir. The perch is a highly specialized species which behaves in the fish community more or less autonomously, because it is able to control its own density in accord with its food resources. The above conclusions are based on a literature review and analyses of new data. Key words: Percidae, community ecology, Perca, biomass, density, production, predation

Trends in Harvests of Pikeperch (Stizostedion lucioperca), Eurasian Perch (Perca fluviatilis), and Northern Pike (Esox lucius) and Associated Environmental Changes in Lakes Mälaren and Hjälmaren, 1914–74

1977 ◽  
Vol 34 (10) ◽  
pp. 1720-1724 ◽  
Author(s):  
Hugo Rundberg
Keyword(s):  
Environmental Changes ◽  
Perca Fluviatilis ◽  
Northern Pike ◽  
Esox Lucius ◽  
Community Change ◽  
Eurasian Perch ◽  
Important Species ◽  
Pike Esox Lucius ◽  
Perch Perca Fluviatilis ◽  
Stizostedion Lucioperca

The fish communities in and the trophic states of lakes Mälaren and Hjälmaren have changed gradually since the late 1700s. In both lakes, pikeperch (Stizostedion lucioperca), Eurasian perch (Perca fluviatilis), and northern pike (Esox lucius) are important species in the recreational and commercial fishery. Pikeperch has increased from an unimportant species to predominance in both lakes. The importance of Eurasian perch however, has decreased markedly. The most likely explanation for these changes is increased cultural eutrophication. Key words: Percidae, pikeperch, Eurasian perch, northern pike, harvests, eutrophication, community change, behavior

Food and Feeding Relations of Eurasian Perch (Perca fluviatilis) and Pikeperch (Stizostedion lucioperca) in Various Waters of the USSR

1977 ◽  
Vol 34 (10) ◽  
pp. 1559-1570 ◽  
Author(s):  
O. A. Popova ◽  
L. A. Sytina
Keyword(s):  
Body Weight ◽  
Feeding Habits ◽  
Fish Fauna ◽  
Perca Fluviatilis ◽  
The Body ◽  
Daily Ration ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis ◽  
Wet Weight ◽  
Stizostedion Lucioperca

Eurasian perch, Perca fluviatilis, and pikeperch, Stizostedion lucioperca, are the most widely distributed of the 11 species of percids in the USSR. This literature review examines their feeding ecology in the USSR.The pikeperch is an ambush–pursuit predator. It can become piscivorous within a few months after hatching, when it begins feeding mostly on small pelagic schooling fishes. In contrast, the perch, a facultative ambush predator, hunts during the day, eating mostly invertebrates and young fish.The daily ration of pikeperch during the most intensive feeding period constitutes 4.5–5.5% of the body weight and decreases to 0.5% during periods of less intensive feeding. The annual ration is 200–250% of its body weight. About 60% of the annual ration is consumed during spring, 15% during summer, 22% during autumn, and 3% during winter. The daily ration of perch is similar to pikeperch — 1–4% of the body weight during spring and autumn and 0.5% during other months. The annual ration of perch is 175–200% of its body weight. About 40% of the annual ration is eaten during spring, 30% during summer, 15% during autumn, and up to 20% during the winter. The conversion of wet weight of food eaten to wet weight of predator is higher for pikeperch (19.6%) and perch (18.2%) than for other predators in our area.Due to different feeding conditions the biological roles of perch and pikeperch vary even within the same water body. Adult pikeperch are always piscivorous, but perch often compete with other fishes for food and are a source of food for pikeperch and other large predators. The abundances of perch and pikeperch are inversely related; a decrease in pikeperch leads to a sharp increase in perch. In some small lakes in the forested area of northwest USSR, the fish fauna is represented by only two sizes of perch: small ones feeding on zooplankton and benthos near shore and larger ones cannibalizing the small ones; these two forms have fluctuated with 17-yr cycles.Calculation of diel, monthly, and annual rations of predators made it possible to determine the total food consumed in a year by one fish and by an entire stock of these predators. Stocking with pikeperch to control smaller fish abundance has been successful in waters with rich food supplies, but in some lakes of Middle Asia it annihilated the native fish fauna. Key words: Percidae, feeding habits, Perca, Stizostedion, annual rations

Oocyte quality indicators in Eurasian perch, Perca fluviatilis L., during reproduction under controlled conditions

Aquaculture ◽  
2011 ◽  
Vol 313 (1-4) ◽  
pp. 84-91 ◽  
Author(s):  
Daniel Żarski ◽  
Katarzyna Palińska ◽  
Katarzyna Targońska ◽  
Zoltán Bokor ◽  
László Kotrik ◽  
...  
Keyword(s):  
Quality Indicators ◽  
Perca Fluviatilis ◽  
Oocyte Quality ◽  
Eurasian Perch ◽  
Controlled Conditions ◽  
Perch Perca Fluviatilis

Effect of different activating solutions on the fertilization ability of Eurasian perch, Perca fluviatilis  L., eggs

2012 ◽  
Vol 28 (6) ◽  
pp. 967-972 ◽  
Author(s):  
D. Żarski ◽  
Á. Horváth ◽  
L. Kotrik ◽  
K. Targońska ◽  
K. Palińska ◽  
...  
Keyword(s):  
Perca Fluviatilis ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis

Patterns of genetic structure of Eurasian perch (Perca fluviatilis L.) in Lake Geneva at the end of the spawning season

2015 ◽  
Vol 41 (3) ◽  
pp. 846-852 ◽  
Author(s):  
Sana Ben Khadher ◽  
Jean-François Agnèse ◽  
Sylvain Milla ◽  
Fabrice Teletchea ◽  
Pascal Fontaine
Keyword(s):  
Genetic Structure ◽  
Perca Fluviatilis ◽  
Spawning Season ◽  
Lake Geneva ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis
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