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The aim of the study was to estimate the economic effectiveness of stocking conducted by Lake Enterprise, Ltd. (Gospodarstwo Jeziorowe Sp. z o.o.) in Ełk based on the analysis of the value of catches made with commercial fishing gear and recreational fishing and the value of released stocking material. Additionally, the effectiveness of the stocking performed by this company was compared with that in other Polish lakes. The study is based on the following materials and data from the literature: prices of commercial lake fish and stocking material used by lake fisheries enterprises in 2005 (Mickiewicz 2010); information on the size and species structure of lake fisheries catches; the quantity and type of stocking material introduced into the lakes; the value of fishing permits sold during the 1998-2005 period by Lake Enterprise, Ltd. in Ełk; and the size and species composition of recreational fishing catches from the 1998-2005 period drawn from questionnaires completed by recreational fishers. The results obtained permitted concluding that the coefficient of the economic effectiveness of the stocking programs conducted in Ełk lakes was higher in comparison to nation-wide data with regard to eel, pike, tench, Crucian carp and carp, while it was lower with regard to vendace, whitefish, pikeperch, and wels catfish. The discussion of the results indicated that the method applied for estimating the fisheries effectiveness of stocking Ełk lakes could have decidedly underestimated effectiveness.
This paper presents the mean wholesale prices of commercial fish and the mean prices of stocking material used in 2013 by fisheries enterprises operating in fisheries zone waters, including lakes, rivers, and dam reservoirs. The prices were calculated based on survey data obtained from 64 enterprises utilizing a combined total of more than 291,000 ha of waters that comprise fisheries zones. These were then compared to the mean prices of commercial fish and stocking material from 2011. The comparative analysis of prices from two years (2011 i 2013) indicated that increases in them for most commercial fish did not exceed 20%; only in the case of three species/assortments did prices increase more than 20%, while for two assortments they were close to 20%. The highest price increase was noted for eel (45%). In comparison to prices from 2011, among the 28 forms of stocking material analyzed, the prices of 21 increased in 2013, while those of seven decreased.
This paper presents the mean wholesale prices of commercial fish and the mean prices of stocking material used in 2011 by fisheries enterprises operating in fisheries district waters, including lakes, rivers, and dam reservoirs. The prices were calculated based on survey data obtained from 68 enterprises utilizing a combined total of more than 299,000 ha of waters that comprise fisheries districts. These were then compared to the mean prices of commercial fish and stocking material from 2009 (Mickiewicz 2010). The results obtained permit presenting significant management and practical information regarding the current prices of fish and stocking material. They also permit confirming differences in the prices of different species and types of commercial fish and stocking material. The comparative analysis of prices from two years (2009 and 2011) indicated that prices for most commercial fish increased, while prices for stocking material increased and then decreased insignificantly. The price increase of most of the commercial fish did not exceed 20%; only in the case of five species and/or varieties (bream small, silver bream, roach small, grass carp, non-commercial trash fish) did the price increase more than 20%. Of the 37 types of stocking material studied, increased prices were noted in 24 varieties, decreases in 12 varieties, while the price of one variety did not change. Decreases and increases in the prices of the most commonly used varieties of stocking material of the most important species in the fisheries districts did not exceed 3%, except in the case of eel stocking material.
This paper presents the mean wholesale price of commercial fish and the mean price of stocking material used in 2009 by fisheries enterprises operating in the waters of fishing districts comprising lakes, rivers, and dam reservoirs. These prices were calculated based on information obtained from questionnaires completed by 57 enterprises operating in 276795 ha of fishing district waters. These were then compared with the mean prices of commercial fish and stocking material from 2007. The results provide important information regarding current prices for fish and stocking material for management and practical purposes. They also reveal that there are substantial differences in prices for individual fish species/types of fish, as well as for given forms of the stocking material of various fish species. Comparing recent prices with those of 2007 indicates that the prices of commercial fish increased insignificantly while those of stocking material were more pronounced. The increases and/or decreases in the prices of commercial fish did not generally exceed 9%; only in the case of four species/types (including the smelt and small non-commercial fish comprising species/types that are of marginal importance) did price fluctuations exceed 20%. The greatest price decrease was noted for vendace and silver carp; however, in neither instance did this exceed 6%. Of the 34 forms of stocking material studied, price increases were noted for 21 while price decreases were noted for 13 forms. In extreme instances, prices increased as much as 200% (vendace summer fry), and decreased as much as over 30% (European wels autumn fry). The most important and most frequently used forms of stocking material of the most important species stocked in fishing districts did not increase in price by more than 10%, while decreases were of about 7% (with the exception of the prices for pike fry and 1+ crucian carp).
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