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References Abramenko, M. I., Kravchenko, O. V., Velikoivanenko, A. E. 1997. Genetic structure of populations in diploidand- triploid complex of Prussian carp Carassius auratus gibelio in the Don basin. Journal of Ichthyology, 37, 1, 62-71 [In Russian]. Astanin, L. P, Podgornyi, M. I. 1963. Reproduction capability of crucian carps Carassius carassius (L.) C. auratus gibelio (Bloch). Journal of Ichthyology, 8, 2(49) [In Russian]. Bogutskaya, N. G., Naseka, А. М., eds. 2004. Catalogue of jawless and fish in fresh & brackish waters of Russia with nomenclature and

References Gromov, I. A., 1987. Oogenesis and plasticity spawning eastern carp Cyprinus Carpio Haematopterus , Biology of freshwater fishes of the Far East. Sb. nauchnich trudov . DVO AN SSSR, Vladivostok, 1–192. Goriunova, A. I., 1960. About breeding of goldfish. Voprocy Ychtiologii , 7 (15), 106–110. Mezhzherin, S. V., Lisetskii, I. L., 2004 a. Natural Hybridization between Silver Prussian Carp ( Carassius auratus ) and Crucian Carp ( C. carassius ): Evolutionary Phenomena or Absorption of One Species by Another? Dopov. Nats. Akad. Nauk Ukr. , 9, 162

References Bronmark C., Paszkowski C. A., Tonn W. M., Hargeby A. 1995 - Predation as a determinant of size structure in populations of crucian carp ( Carassius carassius ) and tench ( Tinca tinca ) - Ecol. Freshw. Fish 4: 85-92. Danylchuk A. J., Tonn W. M. 2006 - Natural disturbance and life history: consequences of winterkill on fathead minnow in boreal lakes - J. Fish. Biol. 68: 681-694. He X., Lodge D. M. 1990 - Using minnow traps to estimate fish population size: the importance of spatial distribution and relative species abundance - Hydrobiologia 190: 9

Abstract

The growth, size variability, condition coefficient and percentage of fish with external deformities were compared in juvenile crucian carp (initially 31 mm TL and 0.36 g BW) which were fed intensively four starters only for 120 days at 25°C. The best weight gain was achieved by fish fed an experimental carp diet with the lowest fat content (7.4%) and a commercial diet for eel containing 15.9% fat (4.33 and 4.15 g BW, respectively). In contrast to the experimental diets, both commercial diets produced fish with high condition coefficient values and a very high (37.2 or 62.7%) percentage of individuals with different external deformities. Size variability did increase over the course of the experiment except in the fish fed the high-energy diet for eel. Survival rates ranged between 96.5 and 99.5%. Our results indicate that juvenile crucian carp can be successfully reared exclusively on dry diets but not the commercial ones for eel or carp used in the present experiment.

References Brykov, V. A., Apalikova, O. V., Eliseikina, M. G., Kovalev, M. Yu. 2005. Mitochondrial DNA variation in diploid and triploid forms of silver crucian carp Carassius auratus gibelio. Russian Journal of Genetics , 41 (6), 811–816 [In Russian]. Cherfas, N. B. 1966. The natural triploidy in females of unisexual form of silver crucian carp ( Carassius auratus gibelio Bloch). Genetika, 2 (5), 16–24 [In Russian]. Cherfas, N. B. 1987. Gynogenesis in fishes. In : Kirpichnikov, V. S., ed. Genetic Basis of Fish Selection. Nauka, Leningrad, 1987, 309

]. Harris, H., Hopkinson, D. A. 1976. Handbook of enzyme electrophoresis in human genetics . North-Holland, Amsterdam, 1–257. Hänfling, B., Bolton, P., Harley, M., Carvalho, G. R. 2005. A molecular approach to detect hybridization between crucian carp ( Carassius carassius ) and non-indigenous carp species ( Carassius spp. and Cyprinus carpio ). Freshwater Biol ., 50 (3), 403–415. Holcík, J. 2003. Changes in the fish fauna and fisheries in the Slovak section of the Danube River: a review. Ann. Limnol. Int. J. Lim ., 39 (3), 177–195. Holčík, J., Žitňan, R. 1978

Economic ranking of the importance of fish species to lake fisheries stocking management in Poland

This paper analyzes commercial fish stocking and catches in lakes in the 2001-2007 period. The eleven fish species that are stocked most intensely were analyzed. Rank scaling was used to compare the parameter values of the analyzed fish species. This permitted ranking all of the species from the most to the least important to lake fisheries management. Pike, Esox lucius L.; eel, Anguilla anguilla (L.); vendace, Coregonus albula (L.); and carp, Cyprinus carpio L were the highest ranked species. These were followed by tench, Tinca tinca (L.), and pikeperch, Sander lucioperca (L.), as well as whitefish, Coregonus lavaretus (L.), and common Crucian carp, Carassius carassius (L.), and Prussian carp, Carassius gibelio (Bloch). The following were of marginal significance: bighead carp, Aristichthys nobilis Rich.; silver carp, Hypophthalmichthys molitrix (Val.), wels catfish, Silurus glanis (L.), and grass carp, Ctenopharyngodon idella Val.

Abstract

We compared techniques used by poachers to capture fishes in the streams and stagnant water bodies of the Tisa River basin in Ukraine, which included: gill nets, lift nets, screen nets, electrofishing devices, spears, concussion, and beach seine. In total, 38 species were observed in poachers’ catches, among which the most abundant were nase (Chondrostoma nasus), Carpathian barbel (Barbus carpathicus), chub (Squalius cephalus), crucian carp (Carassius gibelio), and minnow (Phoxinus phoxinus). The highest diversity of species was observed in gill nets (25 species in rivers and 10 in stagnant waters), lift nets (20 species in rivers and eight in stagnant waters), and electrofishing (19 species). Poachers’ catches can provide information on fish species’ compositions and relative abundance in montane rivers; but there are biases associated with each technique.

Abstract

This paper was based on survey data regarding stocking and fish catches from the 1995-2007 period that was collected from enterprises licensed to manage lake fisheries in Poland. An average of 70 questionnaires were collected annually from lake fisheries enterprises exploiting a combined lake surface area of 228,102 ha. The eleven species of fish analyzed were those that were the most intensely stocked. The effectiveness of stocking in Polish lakes in this period was analyzed by calculating the mean annual stocking effectiveness coefficient, i.e, the value in PLN ha-1 of catches of a given species per 1 PLN ha-1 of stocking this species in a given year. The highest mean annual stocking effectiveness coefficient was noted for pikeperch Sander lucioperca (L.) (4.21 PLN ha-1) and bighead carp Aristichthys noblilis Rich. together with silver carp Hypophthalmichthys molitrix Val. (4.02 PLN ha-1); however, these values were unstable. A similar situation was noted for eel Anguilla anguilla (L.), which had the next highest stocking effectiveness coefficient at 2.32 PLN ha-1. The stocking effectiveness coefficient was stable for tench Tinca tinca (L.) (2.16 PLN ha-1), vendace Coregonus albula (L.) (2.09 PLN ha-1), and pike Esox lucius L. (1.31 PLN ha-1). The stocking of whitefish Coregonus lavaretus (L.), Wels catfish Silurus glanis (L.), crucian carp Carassius carassius (L.) together with Prussian carp Carassius auratus gibelio Bloch., common carp Cyprinus carpio L., and grass carp Ctenopharyngodon idella Val., were ineffective economically from the viewpoint of the size of commercial catches.

-248. Myszkowski L, Kaminski R, Quiros M, Stanny LA, Wolnicki J 2002 - Dry diet-influenced growth, size variability, condition and body deformities in juvenile crucian carp Carassius carassius L. reared under controlled conditions - Arch. Pol. Fish. 10: 51-61. Terlecki J., Pałka R. 1999 - Occurrence of Perccottus glenii Dybowski, 1877 (Perciformes, Odontobutidae) in the middle stretch of the Vistula River, Poland - Arch. Pol. Fish. 7: 141-150. Zakęś Z. 1999 - The effect of body size and water temperature on the results of intensive rearing of pike-perch, Stizostedion