Wyniki wyszukiwania

1

Aquatic fungi growing on the eggs of some anadromous fish species of the family Clupeidae

100%

Czeczuga B., Muszynska E.

Acta Ichthyologica et Piscatoria

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1997

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tom 27

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nr 1

83-93

The authors investigated of the mycoflora developing on the eggs of six species of the genus Alosa.

2

Sezonowe zmiany kondycji,dojrzalych gonad i odzywiania sie sledzia w poludniowym Baltyku w latach 1977-1990

67%

Szypula J.

Zeszyty Naukowe. Rybactwo Morskie i Technologia Żywności. Akademia Rolnicza w Szczecinie.

|

1993

|

tom 20[156]

29-42

3

Odzywianie sie sledzia i szprota w poludniowym Baltyku w latach 1971-1989

67%

Szypula J.

Acta Ichthyologica et Piscatoria

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1992

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tom 22

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nr 2

181-196

4

Studies on the ecology of the clupeid [ Pellonula leonensis Reagan, 1917 ] in the River Warri [ Niger Delta, Nigeria ]

67%

Ikomi R. B.

Acta Hydrobiologica

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1993

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tom 35

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nr 4

381-398

Pellonula leonensis occurs in the River Warri throughout the year and is seasonally abundant. They favour areas with a salinity range of 0.08-3.0‰. The length-frequency polygon showed several modes and the growth pattern was allometric. The condition factor increased with the individual size of the fish and was slightly higher in the females. The fecundity estimate ranged between 9567-16 235 eggs. As much as 11.5% of its body weight was utilized in eggs production. Spawning activities occurred in January and February, and June and July. P. leonensis feeds basically on algae and insects.

5

Ryby morskie w Zalewie Wislanym

51%

Piesciuk M.

Aura

|

1999

|

nr 06

23-24

The Zalew Wiślany is a relatively young body of water as which it was created by a natural separation of the Baltic Bay of Gdańsk by the Vistula sand reef. It is a basin for several larger rivers and a number of streamlets which makes it a quite large resource of freshwater. However, the fresh water mixes with salty waters from of the open Baltic. Salt concentration fluctuates depending on the location and season. It is reflected in the species distribution of the fish occuring here. In the Polish part of the Zalew Wiślany, there are nine sea species. Some of them are common - the herring, flounder, while others species occur scarcely. Absence of the sprat and cod in fish yields has been symptomatic in recent years.

6

Czy parposz wróci do naszych rzek?

51%

Wozniewski M.

Przegląd Rybacki

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2000

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tom 25

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nr 4[53]

Ograniczanie wyników

2 Acta Ichthyologica et Piscatoria

1 Acta Hydrobiologica

1 Aura

1 Przegląd Rybacki

1 Zeszyty Naukowe. Rybactwo Morskie i Technologia Żywności. Akademia Rolnicza w Szczecinie.

2 Szypula J.

1 Czeczuga B.

1 Ikomi R. B.

1 Muszynska E.

1 Piesciuk M.

1 Wozniewski M.

1 2000

1 1999

1 1997