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Cyprinidae; adults; age structure; anthropogenic activities; autumn; biomass; community structure; competitive exclusion; energy; fish; fish communities; fish production; habitats; hydrologic cycle; immigration; insect density; insectivores; insects; invertebrates; predation; pupae; raceways; rain; reproductive success; riparian vegetation; species richness; spring; stream channels; summer; temporal variation; water; water temperature; winter
Abstract:
... The stream continuum concept suggests that the physical structure of the stream channel coupled with the hydrological cycle and energy inputs results in a consistent pattern of community structure and function along a stream. I evaluated this concept in a headwater fish community along two physical gradient gradients: upstream to downstream and riffle to pool. Habitat diversity and volume increase ...
Cyprinidae; Eubothrium; drainage systems; fish; freshwater; lakes; new species; parasitism; British Columbia
Abstract:
... A new species of Eubothrium is described from northern squawfish from lakes in northern British Columbia. Morphologically, Eubothrium tulipai differs from other Eubothrium species in the shapes of the scolex, ovary, and cirrus sac. The new species differs from E. rugosum and E. salvelini, the two other freshwater species located in the Fraser drainage system, in the protuberant, powerful bothria, ...
... Three alternate and distinct fish assemblages were identified in 43 northern Wisconsin lakes encompassing a gradient from bog ponds to small, oligotrophic lakes having little bog character. Multivariate analysis of physical/chemical variables identified three general environmental factors that influence community type and species richness. These factors are: (1) habitat size and heterogeneity; (2) ...
Coregonus; Cyprinidae; Gymnocephalus cernua; Perca fluviatilis; Phalacrocorax carbo sinensis; Thymallus; birds; diet; fish; fish behavior; fishermen; gravel; lakes; pellets; predation; rivers; seasonal variation; species diversity; summer; water reservoirs; winter; Germany
Abstract:
... In Bavaria, an increase in Cormorant (Phalacrocorax carbo sinensis) numbers has lead to increasing conflict between fishermen and conservationists. The diet of cormorants was assessed by examining the contents of oral pellets from seven study sites, thought to be representative of Bavarian waters. These were two large pre-alpine lakes (Chiemsee and Ammersee), a reservoir (Altmühlsee), two gravel p ...
... The phylogenetic relationships among threePseudorasbora fishes (Cyprinidae, Sarcocheiichthyinae) occurring in Japan (P. parva, P. pumila pumila andP. pumila subsp. sensu Nakamura [1963]) were inferred from nucleotide sequences of the mitochondrial 16S rRNA gene. The sequences. of 1240 bp, were determined and compared for 22 specimens from 2–8 populations for each taxon, with a singlePungtungia her ...
Cyprinidae; Sagitta; Salvia hispanica; breeding; dry season; fish; hatching; juveniles; lakes; otoliths; shorelines; water temperature; wet season; Lake Malawi
Abstract:
... Sanjika, Opsaridium microcephalum, were collected from two sites (Nkhotakota and Chia) along the southwestern shoreline of Lake Malawi. The sagitta of the otolith was arrowhead-shaped with an obvious nucleus. Increments in the sagittae were observable until the bases of the rostra but invisible in the rostra. The asteriscus was oval-shaped with an ambiguous nucleus, leading to difficulty in identi ...
... To enable cryopreservation of fish semen to become an efficient, routine technique, much more detailed information is required. Therefore, the present study was conducted to investigate various fertilization techniques and media, straw volumes as well as optimal semen volume for cryopreservation. The bleak (Chalcalburnus chalcalburnus) was used as the main model for investigation. Using frozen-tha ...
... Serum samples collected from red foxes in the city of Berlin between 1996 and 1999 were analysed for the presence of antibodies against Opisthorchis felineus and Metorchis bilis using an indirect ELISA. Out of 1,000 specimens, 30.6% and 46.5% reacted positively with specific O. felineus and M. bilis antigens, respectively. Seroprevalence in adult foxes was always higher than in juveniles. While no ...
Aspergillus; Cyprinidae; Fusarium; Penicillium; Rhizopus; aflatoxins; barley; carbohydrates; corn; fish; fish health; fish production; health status; hygiene; metabolites; microbiology; ochratoxins; research institutions; trichothecenes; veterinary medicine; wheat; zearalenone; Serbia
Abstract:
... In our country, there is present extensive, semi-intensive and intensive growing of cyprinid fish species. The quality of food is an essential prerequisite for obtaining optimal production results in fish production. Fish food is being produced as a complete pellet meal, and raw materials used are of plant, animal, mineral and vitamin origin. Out of plant feed, the most commonly used ones are corn ...
Cyanobacteria; fish; pollution load; nutrients; phosphorus; sediments; reproduction; lakes; turbidity; fish communities; water quality; autumn; Cyprinidae; herbivores; piscivores; eutrophication; biomass; plankton; grazing intensity; chlorophyll; Finland
Abstract:
... The effects of biomanipulation were studied in ten Finnish lakes to determine responses in fish and plankton communities and water quality after mass removal of cyprinids. From 1997 to 2001, the fish communities shifted from the dominance of large cyprinids to an explosion of small cyprinids and a higher proportion of piscivores in effectively biomanipulated lakes (>200 kg ha⁻¹ 3 yr⁻¹). The biomas ...
Cyprinidae; fish; floodplains; habitats; hydrology; indigenous species; linear models; monitoring; rearing; regression analysis; spawning; variance; California; Sacramento River
Abstract:
... We used data gathered across seven hydrologically diverse years (1998–2004) from Yolo Bypass, the primary floodplain of the Sacramento River, California (U.S.A.), to examine how physical and hydrological characteristics of floodplain habitat influence spawning and patterns of occurrence and production of age-0 splittail (Pogonichthys macrolepidotus). We estimated that spawning in Yolo Bypass occur ...
Cyprinidae; discriminant analysis; fish; multivariate analysis; museums; zoology; Indonesia
Abstract:
... The identification improvement among species of Tor was conducted based on fish specimens in Museum Zoology Bogor. Each species represented 8 specimens and measured 22 characters (in mm) used digital caliper. The Canonical variate analysis (discriminant function analysis) was used. The results showed these four species different in morphology, and Tor soro 100% grouping from its congeners. Five ch ...
water quality; community structure; monitoring; stream channels; Cyprinidae; erosion control; wildlife habitats; watersheds; fish; ecological restoration; aquatic habitat; water erosion; Southeastern United States
Abstract:
... Degradation of warmwater streams in agricultural landscapes is a pervasive problem, and reports of restoration effectiveness based on monitoring data are rare. Described is the outcome of rehabilitation of two deeply incised, unstable sand-and-gravel-bed streams. Channel networks of both watersheds were treated using standard erosion control measures, and aquatic habitats within 1-km-long reaches ...
... Western mosquitofish (Gambusia affinis) are one of the most destructive introduced species in the American West. The negative impact of introduced species on native taxa depends on their spatio-temporal overlap, which will determine the availability of refugia for native species. Experiments on the mechanisms underlying the interactions between introduced and native species rarely address habitat ...
... We assessed the influence of land cover at multiple spatial extents on fish assemblage integrity, and the degree to which riparian forests can mitigate the negative effects of catchment urbanization on stream fish assemblages. Riparian cover (urban, forest, and agriculture) was determined within 30 m buffers at longitudinal distances of 200 m, 1 km, and the entire network upstream of 59 non-nested ...
... This study evaluates the toxic effects of the organophosphate pesticide (OP) dichlorvos to the endangered Iberian toothcarp (Aphanius iberus). To this end, the lethal toxicity of dichlorvos based on 96h-LC50 bioassays was determined in saline water (50g/L), and in vivo effects of dichlorvos on cholinesterase (ChE) activity were investigated in adult female and male specimens. The 96h-LC50 value de ...
... Studying species flocks (e.g. Darwin's finches, Caribbean anoline lizards, East African cichlid fishes) has proven to be highly successful in understanding the forces driving speciation. The only known, intact species flock of cyprinid fishes, the 15 Labeobarbus species in Lake Tana (Ethiopia), includes eight piscivorous species. Piscivory is a rare specialisation among the highly successful (>200 ...
... Scattered with numerous salt lakes and [almost equal to]2,700-3,200 m above sea level, the giant Qaidam inland basin on the northern Tibetan Plateau has experienced continuing aridification since the beginning of the Late Cenozoic as a result of the India-Asia plate collision and associated uplift of the Tibetan Plateau. Previous evidence of aridification comes mainly from evaporite deposits and s ...
... A series of histochemical procedures were employed to localize and characterize glycoprotein (GP) classes elaborated in the epithelia of the upper and lower lips and associated structures, namely the rostral cap, the adhesive pad, the horny upper and lower jaw sheaths and the folds of skin between them, of a hill stream fish Garra lamta. The epithelia of the lips, the folds of skin and the major p ...