Variations in Year-Class Strength of Different Perch (Perca fluviatilis) Populations in the Baltic Sea with Special Reference to Temperature and Pollution

1991 ◽  
Vol 48 (7) ◽  
pp. 1181-1187 ◽  
Author(s):  
Paula Böhling ◽  
Richard Hudd ◽  
Hannu Lehtonen ◽  
Peter Karås ◽  
Erik Neuman ◽  
...  
Keyword(s):  
Large Scale ◽  
Age Distribution ◽  
Pulp Mill ◽  
Perca Fluviatilis ◽  
Day Length ◽  
Perch Perca Fluviatilis ◽  
Class Strength ◽  
Pulp Mill Effluents ◽  
Abiotic And Biotic Factors ◽  
The Baltic

Variations in the year-class strength of perch (Perca fluviatilis) were analyzed among 23 populations in Baltic coastal areas distributed between 57 and 66°N using the age distribution in catches. In spite of large differences in abiotic and biotic factors, the variations in year-class strength were similar in 14 of these areas. The similarities could be attributed to large-scale weather variations influencing water temperature. Year-class strength was shown to be correlated with an index based on temperature and day length during the whole first year of life. In two of the nine deviating populations, perch nursery areas are situated in small nearshore freshwaters, where fluctuations in the water level may be more important for recruitment than temperature variations. The other deviating areas were exposed to environmental disturbances, i.e. acidification, oxygen deficits, pulp mill effluents, and thermal discharge, which obviously affected recruitment in a decisive way.

Physiological Disturbances in Fish Living in Coastal Water Polluted with Bleached Kraft Pulp Mill Effluents

1988 ◽  
Vol 45 (9) ◽  
pp. 1525-1536 ◽  
Author(s):  
Tommy Andersson ◽  
Lars Förlin ◽  
Jan Härdig ◽  
Åke Larsson
Keyword(s):  
Blood Cell ◽  
Pulp Mill ◽  
Perca Fluviatilis ◽  
Discharge Point ◽  
Bleached Kraft Pulp ◽  
Perch Perca Fluviatilis ◽  
Gonad Size ◽  
Pulp Mill Effluents ◽  
Bleached Kraft Mill Effluents ◽  
Cytochrome P 450

An extensive trial to examine physiological and biochemical changes in perch (Perca fluviatilis) inhabiting coastal waters polluted by bleached kraft mill effluents (BKME) has been carried out. The investigations were performed at four different times of year. Fish from a reference site and from sampling sites 2, 4.5, 8, and 10 km from the discharge point were examined. The results of the investigation show profound effects of BKME on several fundamental biochemical and physiological functions. Typical symptoms in perch from the polluted areas were reduced gonad growth, enlarged liver, and very strong induction of certain cytochrome P-450-dependent enzyme activities in the liver. Elevated levels of ascorbic acid in liver tissue and abnormal carbohydrate metabolism reflect the effluent's ability to cause metabolic disorders. Marked effects on the white blood cell pattern indicate a suppressed immune defence. Alterations in the red blood cell status and in the ion balance suggest that the demand for oxygen by certain tissues was increased and that gill function was impaired, respectively. The toxic effects were most pronounced in fish living up to 4.5 km from the discharge point, but some disturbances (e.g. cytochrome P-450 induction, reduced gonad size, and hematological alterations) were observed in fish caught as far as 8–10 km from the kraft bleach plant.

Effects of Pulp Mill Effluents on Skeletal Parameters in Fish – A Progress Report

1988 ◽  
Vol 20 (2) ◽  
pp. 87-94 ◽  
Author(s):  
Bengt-Erik Bengtsson
Keyword(s):  
Pulp Mill ◽  
Perca Fluviatilis ◽  
Progress Report ◽  
Metabolic Dysfunction ◽  
Perch Perca Fluviatilis ◽  
Pulp Mill Effluents ◽  
Kraft Mill ◽  
Bleached Kraft Mill Effluents ◽  
Bleak Alburnus Alburnus

In the Gulf of Bothnia the fourhorn sculpin (Myoxocephalus quadricornis) demonstrated elevated levels of deformed spine and/or vertebrae in areas polluted by bleached kraft mill effluents (BKME). Laboratory tests confirmed a correlation between the observed defects and BKME, diluted about 200-1000 times. Analysis of mechanical parameters (strength, elasticity etc) and chemical composition (Ca, P, collagen, proline, hydroxyproline) of single vertebrae confirmed the effects of BKME on bone characteristics in feral and laboratory exposed fourhorn sculpin. Similar effects were recorded also for feral perch (Perca fluviatilis) caught in the vicinity of a pulp mill and bleak (Alburnus alburnus) exposed to various BKME in the laboratory. After about 4 1/2 months of exposure to 0.1 and 0.5 mg tetrachloro-1,2-benzoquinone/L fourhorn sculpin demonstrated vertebral deformities and aberrant mechanical properties of vertebrae. The results are discussed in relation to results obtained from feral fish exposed to BKME and fish exposed to BKME in the laboratory. The recorded effects are suggested to be the results of long-term metabolic dysfunction, leading also to other serious effects in the organism.

scholarly journals Adult female European perch (Perca fluviatilis) from the Baltic Sea show no evidence of thiamine deficiency

2021 ◽  
pp. 102081
Author(s):  
Johan Gustafsson ◽  
Karin Ström ◽  
Linus Arvstrand ◽  
Lars Förlin ◽  
Lillemor Asplund ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Adult Female ◽  
Thiamine Deficiency ◽  
Perca Fluviatilis ◽  
The Baltic Sea ◽  
European Perch ◽  
Perch Perca Fluviatilis ◽  
The Baltic

Population Dynamics of Percids in Lake IJssel and some Smaller Lakes in The Netherlands

1977 ◽  
Vol 34 (10) ◽  
pp. 1710-1719 ◽  
Author(s):  
J. Willemsen
Keyword(s):  
Population Dynamics ◽  
Perca Fluviatilis ◽  
First Year ◽  
Homing Behavior ◽  
Perch Perca Fluviatilis ◽  
Class Strength ◽  
High Summer Temperature ◽  
Dependent Growth ◽  
First Year Of Life ◽  
Slow Growing

Pikeperch (Stizostedion lucioperca) and Eurasian perch (Perca fluviatilis) in Lake IJssel both prey mainly upon the very abundant smelt (Osmerus eperlanus). But competition for food is of little or no importance and growth is not density-dependent. Growth rates for perch and ruffe (Gymnocephalus cernua) in some lakes are exceptionally rapid, mean lengths after 3 yr being 24 and 18 cm, respectively. Very intensive fishing for pikeperch (total annual mortality 81%) in the season before first spawning removes particularly the fast-growing fish from the population, thus restricting reproduction mainly to the slow-growing pikeperch. Year-class strength of pikeperch is strongly favored by a high summer temperature during the first year of life. Strong year-classes of pikeperch in Lake IJssel are characterized by a mean length of the young-of-the-year of 14.5 cm or more. Migration of pikeperch and perch in Lake IJssel is restricted. When transported to other areas of the lake, both species showed a distinct homing behavior. Key words: Percidae, population dynamics, Stizostedion, Perca, Gymnocephalus

Effects of a Pulp Mill Effluent on the Population Dynamics of Perch, Perca fluviatilis

1991 ◽  
Vol 48 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Peter Karås ◽  
Erik Neuman ◽  
Olof Sandström
Keyword(s):  
Posterior Part ◽  
Pulp Mill ◽  
Perca Fluviatilis ◽  
Artificial Substrates ◽  
Pulp Mill Effluent ◽  
Bleached Pulp ◽  
Perch Perca Fluviatilis ◽  
Food And Feeding ◽  
Mortality Causes ◽  
Weight Data

The dynamics of a Baltic perch (Perca fluviatilis) population were studied in a bleached pulp mill effluent area on the Swedish coast. Recruitment was seriously affected, as larval and fry abundances were very low. Studies of spawning on artificial substrates demonstrated that sufficient numbers of eggs were deposited even in the most effluent-exposed parts of the study area. No increased egg mortality could be noted, but at the stage close to hatching about 10% of the embryos were observed to be malformed, generally having sharp bends in the posterior part of the spinal cord. Exposed embryos were generally smaller than reference fishes, both when length and weight data were compared. Larval samplings provided evidence for high mortality at or very close to hatching. Food and feeding conditions appeared to be of little importance for mortality. Two mortality causes were suggested: chronic failure of parental reproductive systems and/or acute toxicity to embryo or early larvae.

Abnormalities of a gill cover bone, the operculum, in perch Perca fluviatilis from a pulp mill effluent area

1994 ◽  
Vol 28 (3-4) ◽  
pp. 189-207 ◽  
Author(s):  
Eric Lindesjöö ◽  
Jan Thulin ◽  
Bengt-Erik Bengtsson ◽  
Ulla Tjärnlund
Keyword(s):  
Pulp Mill ◽  
Perca Fluviatilis ◽  
Pulp Mill Effluent ◽  
Perch Perca Fluviatilis
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