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Baltic herring (Clupea harengus membras) spawning grounds on the Lithuanian coast: current status and shaping factors

100%

Saskov A., Siaulys A., Bucas M., Daunys D.

Oceanologia

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2014

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tom 56

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nr 4

2

Mapping an ecosystem service: A quantitative approach to derive fish feeding ground maps

100%

Siaulys A., Daunys D., Bucas M., Bacevicius E.

Oceanologia

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2012

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tom 54

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nr 3

This study presents a quantitative approach to mapping benthophagous fish feeding grounds. This approach combines the spatial biomass distribution of benthic prey items and their importance for the diets of predators. A point based biomass data of macrozoobenthos together with a set of environmental factors was used to develop Random Forests models that produce continuous biomass distribution layers for individual prey species. Depending on the diet composition and the importance of prey for fish feeding, these layers are overlaid and an integrated GIS map of the seabed showing the quality of feeding grounds is generated. These maps provide a useful basis for conservation and marine spatial planning. In addition, this method could be applied to the mapping of resources used by other benthophagous organisms. The method is presented using the example of three common Baltic fish species: cod, flounder and viviparous eelpout.

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Recent distribution and stock assessment of the red alga Furcellaria lumbricalis on an exposed Baltic Sea coast: combined use of field survey and modelling methods

100%

Bucas M., Daunys D., Olenin S.

Oceanologia

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2009

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tom 51

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nr 3

341-359

Recent results of field studies on the exposed coast of Lithuania were used to model the area occupied by the red alga Furcellaria lumbricalis using the Natural Neighbor interpolation technique, while linear regression was applied to estimate the species’ standing stock. The area covered by F. lumbricalis extended for 26 km along the coast between depths of 1 and 15 m. The maximum species cover in the study area ranged between 4 and 10 m depth, which is one of the widest in the Baltic Sea. The modelled area of F. lumbricalis covered 35 ± 11 km2 with a total biomass of 7554 ± 3813 t.

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Modelling the material uptake and deposition of the Mytilus edulis in the Baltic coastal ecosystem

100%

Zemlys P., Daunys D., Razinkovas A.

Oceanological and Hydrobiological Studies

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2003

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tom 32

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nr 2

Ograniczanie wyników

3 Oceanologia

1 Oceanological and Hydrobiological Studies

4 Daunys D.

3 Bucas M.

2 Siaulys A.

1 Bacevicius E.

1 Olenin S.

1 Razinkovas A.

1 Saskov A.

1 Zemlys P.

1 2014

1 2012

1 2009

1 2003

Baltic herring (Clupea harengus membras) spawning grounds on the Lithuanian coast: current status and shaping factors

Mapping an ecosystem service: A quantitative approach to derive fish feeding ground maps

Recent distribution and stock assessment of the red alga Furcellaria lumbricalis on an exposed Baltic Sea coast: combined use of field survey and modelling methods

Modelling the material uptake and deposition of the Mytilus edulis in the Baltic coastal ecosystem