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Analysis of fishery exploitation parameters of lakes and assessment of their suitability for observation of trends in fish catches

100%

Skrzypczak A., Mamcarz A.

Electronic Journal of Polish Agricultural Universities. Series Fisheries

2003

tom 06

nr 2

Long-term studies on catches from 757 lakes in northeastern Poland served to analyse fishery exploitation parameters available from the records in lakes books. Yield (kg.ha-1), annual frequency of exploitation and relative catch (kg.ha-1.month-1) were analysed in five size classes of lakes, together with the relations occurring between these parameters. Linear correlation was determined between yield versus the number of months of exploitation when the catches were made and relative catch. The latter parameter was characterised by a slightly smaller variability of real values and consequently by a higher concentration along the adjusted trend line compared to the catch per lake area unit.

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The different uses of sea space in Polish Marine Areas: is conflict inevitable?

84%

Weslawski J. M., Urbanski J., Kryla-Staszewska L., Andrulewicz E., Linkowski T., Kuzebski E., Meissner W., Otremba Z., Piwowarczyk J.

Oceanologia

2010

tom 52

nr 3

513-530

Seven major types of sea space use (Nature Protection Measures, Fisheries Ex- ploitation, Geological Exploitation, Recreation, Large Infrastructures, Navigation, Military uses) in the Polish Marine Areas are presented in terms of how much space is used (km2) for each use and the degree of overlap among the different uses. The greatest degree of conflict is noted with regard to Nature Protection (which overlaps with 60% of the areas used for Recreation and Geological Exploitation), and Fisheries Exploitation (which overlaps with 60% of the areas used for Nature Protection, Recreation, Infrastructure and Navigation). On the other hand, Fisheries Exploitation areas are the least disturbed by other users, and its major competitor is Nature Protection, which claims 20% of the areas used by fisheries. A GIS–based map that illustrates the degree of conflict is included, and the authors suggest participatory management as the proper way to minimize conflicts over sea space use and to promote the effective protection of natural resources.

Ograniczanie wyników

1 Electronic Journal of Polish Agricultural Universities. Series Fisheries

1 Oceanologia

1 Andrulewicz E.

1 Kryla-Staszewska L.

1 Kuzebski E.

1 Linkowski T.

1 Mamcarz A.

1 Meissner W.

1 Otremba Z.

1 Piwowarczyk J.

1 Skrzypczak A.

1 Urbanski J.

1 Weslawski J. M.

1 2010

1 2003

Wyniki wyszukiwania

Analysis of fishery exploitation parameters of lakes and assessment of their suitability for observation of trends in fish catches

The different uses of sea space in Polish Marine Areas: is conflict inevitable?