THE IMPACT OF ENVIRONMENTAL CONDITIONS ON GROWTH AND DEVELOPMENT OF SALMO LETNICA SMOLT

Viola Prifti

Abstract


Abstract

Salmo letnica, is one of the most important species of the Lake Ohrid. It is a freshwater fish that lives in cold and rich in oxygen water. Based on its biological and economic importance since 1935 in Macedonia and in Albania since 1995, there have been applied techniques of artificial fertilization and cultivation of S.letnica. Despite adjusting the physical parameters of the water, these fishes show stress in artificial growth environment, which is associated with reduction of their biomass and in many cases even death. There are also private economies to deal with the growth and development of S.letnica for marketing effect. Use of different food regimes has influenced in different amounts of biomass in the same age fish. Through this study we want to show the importance of environmental conditions and nutrition in the growth rates which are reflected in the productivity and the healthy life of this fish.

 


Keywords


Key words: biomass, nutrition regime, physical water parameters, Salmo letnica, stress.

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References


Milosevic D and Talevski T 2015 Conservation status of native species in natural lakes of Drim system (Prespa, Ohrid and Skadar Lake) and dangers of commercial fishing, Bulgarian Journal of Agriculture Science, 21 (Supplment 1), 2015, 61-67

Matzinger A et al 2006a Is Lake Prespa jeopardizing the ecosystem of ancient Lake Ohrid? Hydrobiologia 553: 89–109, doi:10.1007/s10750-005-6427-9.

Matzinger A, Schmid M, Veljanoska-Sarafiloska E, Patceva S, Guseska D, Wagner B, Müller B, Sturm M, Wüest A, 2007 American Society of Limnology and Oceanography, Inc. “Eutrophication of ancient Lake Ohrid: Global warming amplifies detrimental effects of increased nutrient inputs”. Oceanogr. 52(1), 2007, 338–353

Ganoulis J, Murphy LL, Brilly M, 2000 Transboundary Water Resources in Balcans: Initiating a sustainable Co-operative Network, NATO ASI SERIES, Partnership Sub- Series 2: Environmental Security, Vol. 47, Kluwer Academic, Dodrecht, Boston, London, 254pp.

Rakaj N 1995 Iktiofauna e Shqiperise (Ichthyofauna of Albania). Tirana: Shtëpia Botuese “Libri Universitar”.

Kottelat M 1997 European freshwater fishes. Biologia, Bratislava, 52/ Supplement 5: 1-271

Stankovic S 1960 The Balkan Lake Ohrid and its living world. W.Junk, Den Haag, Monogr.biol.9, pp 357

Stefanovic D 1948 Race and ecological investigations on Ohrid salmonids. SAN, Beograd, Posebna izdanja 139/38: 1-207

Spirkovski Z, Krstanovski Z, Selfo L, Sanxhaku M, Puka V L, 2000 "The Monitoring Programme of the Lake Ohrid Conservation Project", in Transboundary Water Resources in the Balkans: Initiating a Sustainable Co-Operative Network, ed. Jacques Ganoulis, I L Murphy, Mitja Brilly (Springer, 2000)

Tesch F W, 1971 Age and growth. In: W. E Ricker (Ed) Methods for Assessment of fish production on fresh water. Blackwell Scientific Publications Oxford: 99-130

Scherrer B 1984 Biostatistique. Morin, Montr´eal, Paris. SPSS Inc., 1999. Systat version 9. SPSS Inc., USA.

Prince A and Powell C, 2000 Clove oil as an anesthetic for invasive field procedures on adult rainbow trout. North American Journal of Fisheries Management, vol. 20, no. 4, pp. 1029-1032.

Korte SM, Olivier B & Koolhaas JM 2007 A new animal welfare concept based on allostasis. Physiology & Behavior 92 422–428. (doi:10.1016/j.physbeh.2006.10.018)

Lagler KF 1996 Freshwater fishery biology. Dubuque, Iowa: W.C. Brown Co; 1966. p. 421

Wootton R J 1990 Ecology of Teleost Fishes. Chapman and Hall. New Jersey, USA: Upper Saddle River; 1990.

le Cren E D 1951The length-weight relationship and seasonal cycle in gonad weights and condition in the perch (Perca fluviatilis) J Anim Ecol. 1951;20(2):201–219.

Gayanilo F C, Pauly D 1997 FAO ICLARM stock assessment tools (FiSAT): references manual. FAO Computerized information series: 262.1997

Abowei JFN 2010 The condition factor, length-weight relationship and abundance of Ilisha africana (Block, 1795) from Nkoro River Niger Delta, Nigeria. Adv J Food Sci Tech. 2010;2:6–11.

Temming A, Herrmann JP 2001 Gastric evacuation of horse mackerel. II. The effects of different prey types on the evacuation model. J Fish Biol. 2001;58(5):1246–1256.

De M, Ghaffar MA, Das SK 2013Temperature effect on gastric emptying time of hybrid grouper (Epinephelus sp.). THE 2014 UKM FST POSTGRADUATE COLLOQUIUM: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2014 Postgraduate Colloquium. AIP Conference Proceedings. 2013;1614:616–618


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