Wyniki wyszukiwania

1

Native people's fisheries in the Soviet North

100%

Reshetnikov Y. S.

Polskie Archiwum Hydrobiologii

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1992

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tom 39

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nr 3-4

2

Effects of shrimp trawlers on the fisheries status and environment of the Northwest Arabian Gulf

88%

Ali T. S.

Acta Ichthyologica et Piscatoria

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2001

|

tom 31

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nr 2

The catch per unit effort (c.p.u.e.) estimated as kg/hr and the yield per recruitment (Y/R) often common by-catch fishes are used in the present paper to investigate the effects of shrimp trawlers on the fisheries status and its environment in the Northwest Arabian Gulf. Samples were collected on weekly basis through fishery-oceanography survey carried out by the Marine Science Centre at the University of Basrah during the period of 1995-1999, using two small shrimp trawlers. The catch per unit effort (c.p.u.e.) of total, commercial fishes, shrimps, and other invertebrates catches showed a drastic drop year by year. The results of the relative yield per recruitment (Y′/R) of the ten investigated species, their optimum and current lengths at first capture (Lc) and their lengths at first maturation (Lm) indicate that the stock of these species suffered a problem of recruitment overfishing. A strategy of protection for Northwest Arabian Gulf fisheries involves implementing closed season, introducing an effort limitation policy should be designed.

3

A comparative study on geometric characteristics of a versatile pelagic trawl: steel vs. dynex warps

88%

Lukasiewicz G., Dudko S., Krol S., Swiniarski J.

Folia Universitatis Agriculturae Stetinensis. Piscaria

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2001

|

tom 28

4

Preliminary investigations of the mechanical properties of meshes turned through 90 gradient

88%

Moderhak W.

Bulletin of the Sea Fisheries Institute

|

2000

|

nr 1

5

Recreational fishery - an alternative to commercial fishing

88%

Draganik B.

Bulletin of the Sea Fisheries Institute

|

1997

|

nr 3

6

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Quantitative evaluation of shark fisheries from cantrang fishing gear in Mayangan Coastal Fishery Port, Probolinggo, Indonesia

75%

Permana R., Kusuma Pringgo D. N. Y. P.

World News of Natural Sciences

|

2020

|

tom 31

7

An estimation of stock dynamics of Eastern Baltic cod using stock-production and difference models

75%

Horbowy J.

Bulletin of the Sea Fisheries Institute

|

2003

|

nr 3

8

Studies on Psilodraco breviceps Norman, 1937 [Pisces, Notothenioidei, Bathydraconidae] from the region of South Georgia

75%

Kompowski A.

Acta Ichthyologica et Piscatoria

|

1992

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tom 22

|

nr 1

9

Profitability, financial liquidity and labour efficiency in fishery and agricultural enterprises

75%

Worniallo J.

Archives of Polish Fisheries

|

2000

|

tom 08

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nr 2

10

Length distribution of perch [Perca fluvatilis L., 1758] trawl-fished in 2000 in the Pomeranian Bay

75%

Krol S., Dudko S., Lukasiewicz G., Swiniarski J.

Folia Universitatis Agriculturae Stetinensis. Piscaria

|

2001

|

tom 28

11

Protecting young European whitefish from trawl fishing in the northernmost parts of the Baltic Sea

75%

Leskela A., Lehtonen H.

Polskie Archiwum Hydrobiologii

|

1992

|

tom 39

|

nr 3-4

12

The vendace [ Coregonus albula L.], a new species in the fish community and fisheries of Lake Inari

75%

Mutenia A., Salonen E.

Polskie Archiwum Hydrobiologii

|

1992

|

tom 39

|

nr 3-4

13

Summary of ichthyoplankton research by the NOAA Beaufort Laboratory in Florida Bay, Everglades National Park, Florida, USA

75%

Powell A. B., Hoss D. E., Konieczna M., Ejsymont L.

Bulletin of the Sea Fisheries Institute

|

2000

|

nr 3

14

ASFA-FAO conference at the Sea Fisheries Institute in Gdynia

75%

Ganowiak H.

Bulletin of the Sea Fisheries Institute

|

1997

|

nr 3

15

Management of fish populations in lobelia lakes in the vicinity of Bytow (northern Poland)

63%

Morzuch J., Kapusta A.

Archives of Polish Fisheries

|

2010

|

tom 18

|

nr 2

16

Remembering professor Zbigniew Piesik

63%

Obolewski K.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2005

|

tom 09

17

Value and structure of fish catches and stocking intensity in lake enterprises before and after fisheries ownership transfer in Poland

63%

Mickiewicz M.

Archives of Polish Fisheries

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2012

|

tom 20

|

nr 2

18

Effects of water quantity on connectivity: the case of the upper Parana River floodplain

63%

Agostinho A. A., Bonecker C. C., Gomes L. C.

International Journal of Ecohydrology and Hydrobiology

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2009

|

tom 09

|

nr 1

The hydrological regime is the main force driving processes in river-floodplain systems. The flood pulse concept serves as a base from which to study the processes acting in such a system. However, when the flood pulse is regulated and there is a need to re-establish the hydrography at close to natural conditions, the best way to achieve this is via ecohydrology, a newly emerging paradigm. In this paper, we use principles of ecohydrology to evaluate the effect of water quantity on the limnology, biota and fishery of the upper Paraná River systems, where a UNESCO demonstration site on ecohydrology is located. In addition, we argue that dam operation can be crucial for restoring the hydrography of the Paraná River to near natural conditions. The data used were collected between 1986 and 2006 in several habitats of the floodplain. The limnology, biota (periphyton, phytoplankton, zooplankton, benthic invertebrates, fish, macrophytes and riparian vegetation) and fishery (ecosystems services) were all influenced by the alteration in the hydrography prompted by the functioning of the dams located upstream from the demonstration site area. Moreover, the observed deterioration of the water quality due to the presence of toxic cyanobacteria is another strong argument for adjusting the dam’s operation to reestablish the timing of the floods to match critical periods of the biota in order to restore ecosystem biodiversity and services.

19

Morphometric characteristics of the juvenile North African catfish Clarias gariepinus [Burchell, 1822] from the heated water aquaculture

63%

Wiecaszek B., Krzykawski S., Antoszek A., Kosik J., Serwotka P.

Electronic Journal of Polish Agricultural Universities. Series Fisheries

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2010

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tom 13

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nr 2

20

Equations describing changes of shape along the flatfish body length and their importance for sustainable and responsible fisheries

63%

Balejko J., Miler K., Nowakowski P.

Acta Ichthyologica et Piscatoria

|

2007

|

tom 37

|

nr 2

Background. The purpose of this study was to identify mathematical equations describing changes in a flatfish body shape along its longitudinal axis. The initial function for the description of a cross-section contour is the ellipse equation including a factor deforming the symmetry with respect to one of axes. Such equations may find their use in fisheries engineering and food-fish processing. Materials and Methods. The morphometric examination of the fish raw material was carried out in order to check whether the proposed function meets expectations and draws a curve. The model fish species used was flounder, Platichthys flesus (L.). Results. The mathematical equation describing changes in a cross-section contour of flatfish body shape along its longitudinal axis. The high value of correlation coefficients (r > 0.99) showed that a hypothetical curve matches experiment results quite well. The equation describing the shape of a flatfish body cross-section contour can be defined by means of the ellipse equation including a factor deforming the symmetry with regard to one of its axes. The function represented by equation (8) draws a curve that follows the contour of the fish cross-section. Conclusion. The shape of flounder, defined in the presently reported study may have importance for sustainable and responsible fisheries, helping to design more selective fishing gear. It can also be used in food-fish engineering for designing more effective fish-processing machinery.

Ograniczanie wyników

Native people's fisheries in the Soviet North

Effects of shrimp trawlers on the fisheries status and environment of the Northwest Arabian Gulf