scholarly journals Littoral 0+ fish assemblages in three reservoirs of the Nové Mlýny dam (Czech Republic)

2011 ◽  
Vol 49 (No. 10) ◽  
pp. 450-457 ◽  
Author(s):  
P. Jurajda ◽  
J. Regenda
Keyword(s):  
Czech Republic ◽  
Fish Assemblages ◽  
Juvenile Fish ◽  
Rutilus Rutilus ◽  
Common Species ◽  
Roach Rutilus Rutilus ◽  
Sandy Gravel ◽  
Fish Samples ◽  
Lowland Reservoirs ◽  
Leuciscus Idus

A synchronous study of 0+ juvenile fish in three lowland reservoirs (Mušov, Věstonice, Nové Mlýny) of the Nové Mlýny dam (Czech Republic) was conducted in July 1997. Fish were sampled by fry beach seine and backpack electro fishing gear at 32 sites in three types of inshore habitats: concrete stepped embankment, stony rip-rap and sandy-gravel beach. In total, we registered 0+ juvenile fish of 17 species and one hybrid. The most common species was bleak Alburnus alburnus (62.7%), followed by roach Rutilus rutilus (12.8%), ide Leuciscus idus (6.2%) and asp Aspius aspius (5.5%). More than 53% of 0+ fish samples were caught in beach sites, 43% in rip-rap sites and only 3.4% in concrete embankment. The littoral assemblages of 0+ fish differed between the three adjacent reservoirs and also between the shoreline types.  

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.

Water temperature influencing dactylogyrid species communities in roach, Rutilus rutilus, in the Czech Republic

2001 ◽  
Vol 75 (4) ◽  
pp. 373-383 ◽  
Author(s):  
A. Šimková ◽  
P. Sasal ◽  
D. Kadlec ◽  
M. Gelnar
Keyword(s):  
Czech Republic ◽  
Water Temperature ◽  
Rare Species ◽  
Interspecific Interactions ◽  
Species Abundance ◽  
Rutilus Rutilus ◽  
Roach Rutilus Rutilus ◽  
Effect Of Water ◽  
Morava River ◽  
The Relationship

Dactylogyrid species (Monogenea) communities were studied in roach, Rutilus rutilus, collected from two localities in the basin of Morava river, Czech Republic, during the period from April to November 1997 and March to September 1998 to determine the effect of water temperature on parasite abundance, species richness and diversity. Dactylogyrid species were found to co-occur on the gills of roach with up to six species found on the same host individual. Nine dactylogyrid species were identified with the abundance of each reaching a very low level. Niche size was considered to increase with species abundance even when water temperature was high. There was a strong effect of water temperature on abundance of the common dactylogyrid species (D. crucifer, D. nanus, D. rutili and D. suecicus) as well as of the rare species D. rarissimus. The temporary occurrence of the rare species was found without any temperature effect. Water temperature did not affect the relationship between abundance and niche size. Niche size increased with abundance, even when the water temperature was high, which suggests that negative interspecific interactions are not important within dactylogyrid communities.

Growth Rates and Growth Efficiencies in Larvae and Juveniles of Rutilus rutilus and Other Cyprinid Species: Effects of Temperature and Food in the Laboratory and in the Field

1988 ◽  
Vol 45 (6) ◽  
pp. 943-950 ◽  
Author(s):  
W. Wieser ◽  
H. Forstner ◽  
F. Schiemer ◽  
W. Mark
Keyword(s):  
Growth Rates ◽  
Cold Water ◽  
Juvenile Fish ◽  
Larval Growth ◽  
Rutilus Rutilus ◽  
Growth Efficiency ◽  
Gut Contents ◽  
Sudden Increase ◽  
Roach Rutilus Rutilus ◽  
Relative Growth Rates

Growth rates were determined in four 0+ class populations of roach (Rutilus rutilus): two from warm backwaters of the Danube and two from cold-water lakes. Larval growth was also determined in the laboratory for R. rutilus, Leuciscus cephalus, and Alburnus alburnus at 15, 20, and 25 °C. Q10 values of growth rates were low (1.29–1.67) between 20 and 25 °C but were high (3.9) between 15 and 20 °C. Net growth efficiency of the larvae of R. rutilus ranged from 68.6 to 71.9% at 15 °C and from 72.3 to 73.5% at 20 °C. A comparison of temperature-corrected relative growth rates in the four populations of roach revealed significant differences between the two warmwater and the two cold-water populations. Growth of warmwater populations was fastest right after hatching and then declined in a fairly regular way. Growth of cold-water populations was slow after hatching but increased later. These differences reflect interactions between temperature and food availability in the two types of water bodies. The sudden increase in growth rate in the population from the coldest lake can be correlated with a change in gut contents which in turn reflects the improved ability of the juvenile fish for catching Zooplankton.

Experimental study on the influence of paper and pulp mill effluent on the gill parasite communities of roach (Rutilus rutilus)

Parasitology ◽  
1996 ◽  
Vol 112 (5) ◽  
pp. 499-508 ◽  
Author(s):  
A. M. Bagge ◽  
E. T. Valtonen
Keyword(s):  
Pulp Mill ◽  
Rutilus Rutilus ◽  
Common Species ◽  
Roach Rutilus Rutilus ◽  
Metazoan Parasites ◽  
Apparent Lack ◽  
Pulp Mill Effluents ◽  
Paper And Pulp ◽  
Main Components ◽  
Gill Parasites

SUMMARYRoach (n = 81) caught on 23 May, 1992 from oligotrophic, unpolluted Lake Peurunka were kept in cages over a 2-week period before moving half of the fish to nearby Lake Vatia, which is influenced by pulp mill effluents. Before moving the fish gill parasites were examined from 9 fish; 5 Dactylogyrus species, Gyrodactylus sp. and Paradiplozoon homoion were found, the main components of the infracommunities being dactylogyrids. Afterwards, 5 fish from each lake were studied weekly between 1 July and 17 August. Metazoan parasites were recorded from gill arches divided into 4 sections along the dorso-ventral axis. D. crucifer, D. nanus, D. micracanthus and D. suecicus occurred in both lakes throughout the study. Gyrodactylus sp., Ergasilus briani and P. homoion occurred in low numbers in both lakes. Differences between the lakes were seen in the prevalence of D. micracanthus which was higher in Lake Vatia and significantly increased abundances of D. crucifer, D. nanus and D. micracanthus in Lake Vatia. Abundances of other Dactylogyrus species remained, on average, at the same level in both lakes. No change during the experiment was recorded in the location of the two most common species, D. crucifer and D. nanus, on the host gills in either of the lakes, both species favouring the 2nd and 3rd gill arches and especially the inner parts of the gills. The apparent lack of competition between the 2 most common Dactylogyrus species indicates that no limitation of resources on roach gills occurred. This was also confirmed by the increased overlapping indices with increasing abundances between the two most common species in Lake Vatia.

Temporal variation in juvenile fish communities of Kaunas reservoir littoral zone, Lithuania

2012 ◽  
Vol 7 (5) ◽  
pp. 858-866 ◽  
Author(s):  
Valdemaras Žiliukas ◽  
Vida Žiliukienė ◽  
Rimantas Repečka
Keyword(s):  
Littoral Zone ◽  
Gasterosteus Aculeatus ◽  
Juvenile Fish ◽  
Fish Communities ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Diversity Indices ◽  
Fish Diversity ◽  
Roach Rutilus Rutilus ◽  
Species Diversity Indices

AbstractThe aim of this study was to assess juvenile fish communities in terms of species composition, fish diversity and density in the littoral zone of the Kaunas reservoir before (in 1989–1990, period I) and after (in 1999–2000, period II, and in 2006–2007, period III) launching the Kruonis hydroelectric pumped plant (Kruonis HPP). During the whole research period, 20 fish species were caught. According to the frequency of occurrence, the three-spined stickleback Gasterosteus aculeatus, European perch Perca fluviatilis and roach Rutilus rutilus were regarded as constant species in all investigated periods. Significant differences were established in juvenile fish community density between period I and periods II and III, whereas species richness (S) and species diversity indices (H′, J′) did not change significantly. The density of the shoreline community in period III was more than two times lower than in period I, probably due to higher fluctuations in water level of the reservoir, resulting from the Kruonis HPP operation.

scholarly journals Monogeneans of fish of the Mingechevir Reservoir of the Kura River basin

2019 ◽  
Keyword(s):  
River Basin ◽  
Juvenile Fish ◽  
Rutilus Rutilus ◽  
The Body ◽  
Small Fish ◽  
Ecological Groups ◽  
Roach Rutilus Rutilus ◽  
Spined Loach ◽  
Silurus Glanis ◽  
Faunistic Complex

In 2010–2013, a study on fish of the Mingechevir Reservoir of the Kura River basin, for infestation with parasites belonging to the Monogenea class was conducted. 297 specimens of fish were subjected to parasitological dissections. These fish belong to the following 23 species: roach – Rutilus rutilus caspius, Caucasian chub – Leuciscus cephalus orientalis, asp – Aspius aspius taeniatus, tench – Tinca tinca, Kura nase – Chondrostoma cyri, Kura khramulya – Capoeta capoeta, chanari-barbel – Luciobarbus capito, goldfish – Carassius auratus gibelio, carp – Cyprinus carpio, Kura beardie – Barbatula brandti, Transcaucasica spined loach – Cobitis taenia satunini, catfish – Silurus glanis, mosquito fish – Gambusia affinis, pike – Sander lucioperca, big headed goby – Neogobius kessleri gorlap, monkey goby – N. fluviatilis pallasi. As a result of the research, 34 species of monogeneans belonging to 3 orders of 4 families and 5 genera were identified. The overwhelming majority (32 species) of monogeneans found are parasitic on the gill petals of fish, from two to six species are also found on the surface of the body and fins, in the nasal cavity of fish. Of the found monogeneans, 24 species (70.6%) are specific for one species or one genus of fish. It has been established that monogeneans parasitizing on several hosts infect the main of them more than others fish, and the intensity of invasion of fish with large sizes was higher than that of relatively small fish. By their origin, 23 species or 67.7% of all species belong to the boreal lowland faunistic complex. According to the ecological groups of this complex, they are distributed as follows: in the Ponto-Caspian group – 17 species, in the Palaearctic and amphiboreal groups – 3 species each. The Middle East faunistic complex is represented by six, the Indian lowland complex is represented by three, and the Ponto-Caspian marine complex by two species. Among the monogeneans of fish of the Mingechevir Reservoir, two species, Dactylogyrus extensus and D. vastator destroy gill petals of their hosts and cause their diseases. They are the cause of the mass death of juvenile fish.

INDICATORS OF INVASION OF MASS CARP SPECIES BY METCERCARIAE OF OPISTHORCHIIDAE FAMILY IN THE LOWER IRTYSH

2017 ◽  
pp. 37-42
Author(s):  
Inna Nikolaevna Medvedeva ◽  
Elizaveta L'vovna Liberman
Keyword(s):  
Rutilus Rutilus ◽  
Intermediate Hosts ◽  
Roach Rutilus Rutilus ◽  
Opisthorchis Felineus ◽  
Bream Abramis Brama ◽  
Irtysh Basin ◽  
Combined Infection ◽  
Leuciscus Idus ◽  
Intensity Of Invasion ◽  
Made In

In the basin of the Lower Irtysh, the most common types of carp fish (Cyprinidae) are ide ( Leuciscus idus ), bream ( Abramis brama ) and roach ( Rutilus rutilus ). The fish caught in the summer 2017 (20 ide specimens of 3+…7+ years old and 61 roach specimens of 1+…6+ years old) were infested by two Opisthorchiidae representatives: opisthorchosis pathogen Opisthorchis felineus and methorhoz pathogen Metorchis bilis , for which they are an intermediate hosts (a definitive host are carnivorous animals and a human). The extent of invasion by metacercariae of O. felineus was 70%, the combined infection with M. bilis - 25%. Species infested only by methorchis were not detected. Bream is invaded only by an opisthorchiasis pathogen (46.1%). Minimal values were registered in roach: degree of invasion by opisthorchis is 31.1%, degree of invasion by methorchisis is 3.3%, combined invasion occurs in 1.6% of fish. Intensity of infestation with metacercariae of O. felineus (specimens per one fish) made in average: at the age of 3+ - 180.4 specimens per one fish; at the age of 4+ - 105; 5+ - 483.4; 6+ - 938; 7+ - 22. M. bilis was registered at the age of 5+ - 8.5 specimens; 6+ - 675; 7+ - 18. In roach, the intensity of invasion of O. felineus per fish was at the age of 3+ - 33.1 specimens; 4+ - 9.3; 5+ - 7.7; 6+ - 5.3. M. bilis in roach was registered since the age of 2+ and amounted to 2 specimens per a fish; 3+ - 25; 6+ - 6. In bream the intensity of infestation of O. felineus is not high and at the age of 3+ it made 2.7; 4+ - 3.3; 5+ - 13; 6+ - 1 per a fish. The maximum abundance index of O. felineus and M. bilis was found in the population of ide and made 316.5 and 35.5 specimens; in roach AI was 21.9 and 0.8, respectively. The population of bream was least affected by opisthorchis (2.3). The high number of parasites proves that the Lower Irtysh basin is a natural seat of opisthorchosis, that is why, in order to prevent opisthorchosis and methorchisis spreading, it is recommended to strengthen the veterinary and sanitary control in places where fish products are processed and sold, as well as to extend activities on publicizing sanitary rules and preventive norms against these infections.

scholarly journals Spatio-temporal variations of fish assemblages in seagrass ecosystem of Karang Congkak Island, Kepulauan Seribu

2019 ◽  
Vol 19 (3) ◽  
pp. 491
Author(s):  
Adinda Kurnia Putri ◽  
Ridwan Affandi ◽  
Charles P.H. Simanjuntak ◽  
M. Fadjar Rahardjo
Keyword(s):  
Fish Assemblages ◽  
Juvenile Fish ◽  
Common Species ◽  
Temporal Variations ◽  
Spatial And Temporal Variation ◽  
Beach Seine ◽  
Coastal Fisheries ◽  
Siganus Canaliculatus ◽  
Seagrass Ecosystem ◽  
Spatio Temporal

Seagrass are globally known as an essential habitat for marine fishes. The study of fish assemblages in seagrass ecosystem is needed as the first base to select the most suitable coastal fisheries management. The study aims to reveal the composition of fish assemblages both seasonally and spatially in Karang Congkak Island, Kepulauan Seribu. Sampling was performed six times in NW monsoon (March), first transitional monsoon (April-May) and SE monsoon (Juni, August, September) 2018. Fish were sampled at four sites at seagrass ecosystem of Karang Congkak Island, namely eastern, southern, western, and northern by using beach seine net. The differences of juvenile fish assemblages were analyzed using One-Way ANOSIM. A total of 6,326 fish were collected belonging to 78 species, 31 families and 10 orders in which Labridae was the most diverse family. The result indicates strong spatial and temporal variation in fish composition. Fish compositions were dominated by juvenile both spatially and temporally. The most common species that inhabits seagrass beds of the Karang Congkak Island as temporary resident such as Gerres oyena and Siganus canaliculatus, and regular visitor namely Halichoeres argus. Cannonical correspondence analysis indicated strong correlation between several fish species and environmental variables.

Population Characteristics and Feeding of Roach Rutilus rutilus in Small Regulated River of the Kyiv Polissya

2020 ◽  
Vol 56 (1) ◽  
pp. 42-48
Author(s):  
Ye. A. Gupalo ◽  
I. I. Abramyuk ◽  
S. A. Afanasyev ◽  
O. V. Manturova ◽  
Ye. V. Savchenko
Keyword(s):  
Rutilus Rutilus ◽  
Population Characteristics ◽  
Regulated River ◽  
Roach Rutilus Rutilus
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