A comparative study on the feeding of eel, Anguilla anguilla (L.), bream, Abramis brama (L.) and ruffe, Gymnocephalus cernuus (L.) in Lake Võrtsjärv, Estonia

1999 ◽  
pp. 65-72 ◽  
Author(s):  
Külli Kangur ◽  
Andu Kangur ◽  
Peeter Kangur
Keyword(s):  
Comparative Study ◽  
Anguilla Anguilla ◽  
Abramis Brama ◽  
Gymnocephalus Cernuus ◽  
Bream Abramis Brama ◽  
Lake Võrtsjärv

A comparative study of sexual product quality in F1 hybrids of the bream Abramis brama × the silver bream Blicca bjoerkna

2012 ◽  
Vol 78 (6) ◽  
pp. 1173-1178 ◽  
Author(s):  
Billy Nzau Matondo ◽  
Michaël Ovidio ◽  
Jean-Claude Philippart ◽  
Pascal Poncin
Keyword(s):  
Comparative Study ◽  
Product Quality ◽  
F1 Hybrids ◽  
Abramis Brama ◽  
Bream Abramis Brama

Effects of Exploitation, Introductions, and Eutrophication on Percids in Lake Balaton

1977 ◽  
Vol 34 (10) ◽  
pp. 1678-1683 ◽  
Author(s):  
Péter Biró
Keyword(s):  
Perca Fluviatilis ◽  
Anguilla Anguilla ◽  
Nonnative Species ◽  
Lake Balaton ◽  
Abramis Brama ◽  
Bream Abramis Brama ◽  
Perch Perca Fluviatilis ◽  
Exploitation Rate ◽  
Maximum Sustained Yield ◽  
Stizostedion Lucioperca

Percid populations in Lake Balaton have undergone changes which are considered to have been caused by individual or combined effects of overfishing, interspecific competition from nonnative species, and loadings of nutrients and pesticides. Eurasian perch (Perca fluviatilis) has almost disappeared and the ruffe (Gymnocephalus cernua) population is declining, probably as a result of competition from the eel (Anguilla anguilla) and effects of cultural eutrophication. Growth rate of pikeperch (Stizostedion lucioperca) is declining while that of the bream (Abramis brama) is increasing. Production of cyprinids has increased up to 10% in recent years, apparently in response to accelerated eutrophication. The exploitation rate of pikeperch is far in excess of that considered necessary for maximum sustained yield. The environment in the most eutrophic part of the lake is now considered to be unfavourable for pikeperch. Key words: Percidae, Stizostedion, Perca, Gymnocephalus, exploitation, eutrophication, introductions, ruffe, Lake Balaton

Resource Partitioning and Niche Shifts of Bream (Abramis brama) and Eel (Anguilla anguilla) Mediated by Predation of Smelt (Osmerus eperlanus) on Daphnia hyalina

1985 ◽  
Vol 42 (8) ◽  
pp. 1342-1351 ◽  
Author(s):  
Eddy H. R. R. Lammens ◽  
Henrik W. de Nie ◽  
Jacobus Vijverberg ◽  
Wim L T. van Densen
Keyword(s):  
Resource Partitioning ◽  
Hydrological Regime ◽  
Anguilla Anguilla ◽  
Planktivorous Fish ◽  
Abramis Brama ◽  
Important Food ◽  
Bream Abramis Brama ◽  
Niche Shifts ◽  
Daphnia Hyalina ◽  
Osmerus Eperlanus

The resource partitioning of the bream (Abramis brama) and eel (Anguilla anguilla) populations in Lake Tjeukemeer, The Netherlands, was related to the variation in abundance of their most important food organisms, Daphnia hyalina and larval chironomids. Niche shifts of both bream and eel populations were related to the abundance of young planktivorous fish, particularly smelt (Osmerus eperlanus). When these fish were abundant the D. hyalina population was dominated by small individuals and bream switched from a planktivorous to a benthivorous diet, the condition of mature bream deteriorated, and its gonads developed poorly. Under these circumstances the eel population switched from a diet of chironomid pupae and molluscs to one of predominantly fish. The condition of eels smaller than 35 cm decreased and the chironomid population decreased in numbers and biomass. Conversely, when the recruitment of planktivorous fish was poor, the size of D. hyalina was large and diets and conditions of bream and eel populations changed again. Because of the hydrological regime the stock of the young planktivorous fish is determined to a great extent by the immigration of allochthonous larval smelt and varies markedly, but the biomass of the bream and eel populations is comparatively stable.

The Source of Muddy Odor in Bream (Abramis brama) from the Porvoo Sea Area (Gulf of Finland)

1979 ◽  
Vol 36 (8) ◽  
pp. 883-890 ◽  
Author(s):  
Per-Edvin Persson
Keyword(s):  
Abramis Brama ◽  
Blue Green Alga ◽  
Bream Abramis Brama ◽  
High Nutrient ◽  
Off Flavors ◽  
Odor Compounds ◽  
High Concentrations ◽  
High Nutrient Concentration ◽  
Oscillatoria Agardhii ◽  
Sea Area

The study area was a shallow, extremely eutrophic, somewhat brackish water bay on the south coast of Finland. Muddy odor in bream (Abramis brama) was significantly correlated with the amount of the blue-green alga Oscillatoria agardhii occurring in the phytoplankton. Cultures dominated by this alga contained the muddy odor compound geosmin. The high concentrations of O. agardhii in the study area were caused by several interacting factors, of which the high nutrient concentration and the temperature of the water seemed to be especially important. Odoriferous actinomycetes isolated from the water produced the muddy odor compounds geosmin and 2-methylisoborneol, but there seemed to be a lag time of several weeks between maximal concentrations of actinomycetes and development of off-flavors in the fish. Key words: geosmin, 2-methylisoborneol, Oscillatoria agardhii, actinomycetes, flavor, fish, eutrophication

Sign in / Sign up

Export Citation Format

Share Document