The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Effects of nickel, administered as aqueous solutions of nickel (II) nitrate (V), on European catfish, Silurus glanis L. were studied. The fish were at first exposed for 24 h (short-term exposure). The results obtained during the short-term exposure were used to determine the amount of nickel to be used during a 60-d (long-term) exposure. A significant effect of nickel on the distribution of zinc and...
Vendace acquired for the fecundity analysis originated from six west Pomeranian lakes: Pile (97 specimens), Komorze (41), Drawsko (62), Pełcz (89), Moryńskie (91), and Leśne (70). The fish were caught during commercial catches using anchored gillnets, 24-mm mesh size. Substantial differences were stated in individual biological parameters between fish representing different lakes, even if the dominant...
Comparative biological and morphometric studies were carried out on vendace from lakes Drawsko and Pełcz in two seasons of the year. The summer sample covered 106 specimens of this fish from Drawsko Lake and 120 specimens from Pełcz Lake, while the autumn sample consisted of 110 and 104 specimens, respectively. This survey demonstrated a number of significant differences in the individual weights,...
The paper presents the analysis of relationships between variations in Fulton′s condition coefficient (K) and the exponent n in the length-weight (L-W) relationship. When n < 3, K was observed to decrease with fish size; a reverse was true when n > 3. On the other hand, the condition coefficient K′ (Bagenal and Tesch 1978) remained constant and not related to fish size, regardless of n. The...
A 21-day feeding experiment was conducted to assess the effects of diets supplemented with fish intestinal bacteria producing extracellular enzyme on growth and survival of rohu, Labeo rohita (Hamilton) spawn (average weight 0.3 mg). Intestinal bacteria were isolated from healthy rohu fingerlings (average weight 3.51 ±0.31 g). Six isocaloric (4.24 kcalּg-1) and isonitrogenous (approximately 35% crude...
The objective of the present study was to determine concentration levels of p,p′-DDT and its metabolites (p,p′-DDE and p,p′-DDD) as well as γ-HCH and PCBs in bottom sediments, zebra mussel and in 3 more important fish species.
The study was carried out on the alga Chlorella vulgaris and young specimens of crucian carp Carassius carassius. The algae and fish were exposed to a pesticide gamametox powder containing 0.6% of lindane and 3% of methoxychlor. Gas chromatography method was used to determine the content of these two active substances in the material. Based on the mean lindane and methoxychlor contents it was revealed...
The authors investigated the carotenoids content in yellow, yellow-orange, and orange eggs of salmon (Salmo salar L.) and brown trout (Salmo trutta L.) entering Polish rivers for spawning or reared in fresh water. The study shows the presence of females of both salmon and brown trout with the M74 syndrome.
Substrate-based farming practices are considered viable low-cost technologies as they help in sustainable aquaculture production. This investigation of 90-day duration was carried out in mud-bottomed cement tanks to study the effect of substrate and/or feed on growth and production of fringe-lipped peninsula carp, Labeo fimbriatus. The treatments consisted of sugarcane bagasse (T1), sugarcane bagasse...
Protein sparing by lipid has been demonstrated in certain cultivable species of fish. This study was carried out using four low protein isonitrogenous diets (24% crude protein) formulated by supplementing varied levels of fish oil (0, 3, 6, and 9%). The diets were fed for 120 days at 5% body weight to triplicate groups of common carp (av. wt. 2.13-2.21 g) stocked at 1 per m2 in mud bottomed cement...
Polychlorinated hydrocarbons are convenient indicators of environmental pollution. The aim of this study was to determine the presence of p,p′-DDT and its metabolites (p,p′-DDE and p,p′-DDD) and γ-HCH and PCBs in: the dorsal muscles of 3 most important fish species (cod, herring, and flounder), in blue mussel, and in the bottom sediments off the coast of the south-western Baltic Sea. The analyses...
Mycoflora developing on some fish species, recently introduced to Polish waters, has not been known. The authors incubated muscles of four fish species (monkey goby, Neogobius fluviatilis; racer goby, N. gymnotrachelus; Chinese sleeper, Perccottus glenii; and stone moroko, Pseudorasbora parva caught in the drainage area of the Bug River) in water taken from 6 different places. A total of 59 fungus...
Anguillicola crassus is an Asian nematode accidentally introduced to Europe and parasitising the swimbladder of European eels. Planktonic copepods are the major intermediate hosts but the success of this parasites depends on small fishes, acting as paratenic hosts and transmitting the nematode to eels. The role played by cyprinids and percids in the life cycle of A. crassus in the Vistula Lagoon was...
Mymarothecium viatorum sp. n. (Dactylogyridae, Ancyrocephalinae) is described from the gills of Piaractus brachypomus (Teleostei, Serrasalmidae) captured in the warm water canal of a power plant of the city of Szczecin, Poland. The new species is differentiated from other species in the genus by presenting a copulatory ligament that articulates to the accessory piece subterminally (not terminally),...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.