Impacts of bleak (Alburnus alburnus) and roach (Rutilus rutilus) on water quality, sedimentation and internal nutrient loading

Hydrobiologia ◽  
1992 ◽  
Vol 243-244 (1) ◽  
pp. 323-331 ◽  
Author(s):  
Jukka Horppila ◽  
Timo Kairesalo
Keyword(s):  
Water Quality ◽  
Nutrient Loading ◽  
Rutilus Rutilus ◽  
Roach Rutilus Rutilus ◽  
Internal Nutrient Loading ◽  
Bleak Alburnus Alburnus

Myxobolus species infecting the cartilaginous rays of the gill filaments in cyprinid fishes

2008 ◽  
Vol 53 (4) ◽  
Author(s):  
Kálmán Molnár ◽  
Gábor Cech ◽  
Csaba Székely
Keyword(s):  
18S Rdna ◽  
Rutilus Rutilus ◽  
Molecular Methods ◽  
Roach Rutilus Rutilus ◽  
Myxobolus Species ◽  
Rdna Sequences ◽  
Gill Filaments ◽  
18S Rdna Sequences ◽  
Cyprinid Fishes ◽  
Bleak Alburnus Alburnus

AbstractDuring a survey on myxosporean parasites of cyprinid fishes in Hungary, Myxobolus infections were found in the cartilaginous rays of the gill filaments in roach (Rutilus rutilus) and bleak (Alburnus alburnus). Myxobolus spp. causing the infections were studied by morphological, histological and molecular methods. Small plasmodia surrounded by chondrocytes contained relatively few spores which differed from each other and from the known Myxobolus spp. both in their morphology and 18S rDNA sequences. Both species, described as M. feisti sp. nov. and M. susanlimae sp. nov., are characterised by a specific cartilaginous histotropism.

Changes in roach (Rutilus rutilus (L.)) diet and growth in relation to river water quality

Ekologija ◽  
2014 ◽  
Vol 59 (3) ◽  
Author(s):  
Virginija Pliūraitė ◽  
Tomas Virbickas ◽  
Vesta Skrodenytė-Arbačiauskienė
Keyword(s):  
Water Quality ◽  
River Water ◽  
Rutilus Rutilus ◽  
River Water Quality ◽  
Roach Rutilus Rutilus

Prey Detection in Cyprinids during Early Development

1989 ◽  
Vol 46 (6) ◽  
pp. 995-1001 ◽  
Author(s):  
Josef Wanzenböck ◽  
Fritz Schiemer
Keyword(s):  
Visual Acuity ◽  
Juvenile Fish ◽  
Rutilus Rutilus ◽  
Prey Detection ◽  
Roach Rutilus Rutilus ◽  
Fish Size ◽  
Video Recordings ◽  
Prey Location ◽  
Bleak Alburnus Alburnus ◽  
Zooplankton Prey

Larval and juvenile fish of roach (Rutilus rutilus L), bleak (Alburnus alburnus L), and blue bream (Abramis ballerus L.) were investigated weekly to define the ontogenetic development of prey detection capacities. Visual acuity was determined by measuring reactive distances for zooplankton prey for fish from 8 to 50 mm standard length using video recordings. Data of reactive distances, swimming speeds, and the characteristics of the visual field were combined to calculate prey location volumes. Prey location capacity increased exponentially with fish size which implies enormous differences in prey encounter rates among size classes of cyprinids. Distinct differences of prey location capacities occurred between species in the juvenile, planktivorous stages of the three cyprinids coinciding with the trophic differentiation of the adults.

Parasite communities as indicators of recovery from pollution: parasites of roach (Rutilus rutilus) and perch (Perca fluviatilis) in Central Finland

Parasitology ◽  
2003 ◽  
Vol 126 (7) ◽  
pp. S43-S52 ◽  
Author(s):  
E. T. VALTONEN ◽  
J. C. HOLMES ◽  
J. ARONEN ◽  
I. RAUTALAHTI
Keyword(s):  
Nutrient Loading ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Shallow Waters ◽  
Ichthyophthirius Multifiliis ◽  
Roach Rutilus Rutilus ◽  
Parasite Communities ◽  
Perch Perca Fluviatilis ◽  
Discriminant Analyses ◽  
Polluted Lake

We compared parasite communities in fish taken from a polluted lake (L. Vatia) and two control lakes before (1986) and after (1995) nine years of markedly reduced chemical and nutrient loading from a pulpmill in central Finland. Discriminant analyses of the 1995 data, using a function based on the 1986 data, showed that the parasite communities in the fish from the two control lakes had changed relatively little, whereas those from L. Vatia had converged on those from the mesotrophic control lake, indicating substantial recovery from the effects of pollution. Only a few species of parasites provided evidence for recovery. These were anodontid glochidia, which had increased markedly in perch, Rhipidocotyle fennica in roach and R. campanula in both fish species. This suggests that the recovery of the polluted lake involved increased populations of anadontid clams in shallow waters. On the other side decrease of Dermocystidium percae on perch fins and Ichthyophthirius multifiliis on roach indicate increased immune responses in the fish, reflecting better water quality. Other parts of the system have apparently not yet recovered.

Fecundity of Two Cyprinid Fishes in the River Thames, Reading, England

1969 ◽  
Vol 26 (11) ◽  
pp. 2795-2805 ◽  
Author(s):  
I. Mackay ◽  
K. H. Mann
Keyword(s):  
Population Density ◽  
Egg Production ◽  
Rutilus Rutilus ◽  
Confidence Limits ◽  
Roach Rutilus Rutilus ◽  
Spawning Period ◽  
Cyprinid Fishes ◽  
River Thames ◽  
The Relationship ◽  
Bleak Alburnus Alburnus

Egg production by two cyprinids in the River Thames at Reading, England, was studied quantitatively from January to June 1966. Roach (Rutilus rutilus) had a short spawning period, shedding all their eggs in one batch, whereas bleak (Alburnus alburnus) had a protracted spawning period and produced two or three batches of eggs. The relationship between egg numbers (Y) and age (X) for roach was given by log Y = 0.0840X + 3.2085; the estimated fecundity of a 6-year-old fish was 5157 with 95% confidence limits at 4725 and 5631. For bleak the relationship was log Y = 0.0564X + 3.5221, and the estimated fecundity of a 5-year-old fish was 6356 with 95% confidence limits at 5987 and 6776. Combining previously obtained data on population density with new data on sex ratio and percentage breeding in each age class, the population fecundity for roach was about 600 eggs/m2 and for bleak about 3000 eggs/m2.The roach population had lower fecundity than roach populations in other studies and there was some evidence that a proportion of females ceased egg production during the period of the study. The possibility that low fecundity was a response to food shortage is discussed.

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