Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Oceanological and Hydrobiological Studies

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: Vistula Estuary

Sortuj według:

Ogranicz wyniki do:

Seasonal variability of hydrodynamics in the Vistula Estuary in 1994

Robakiewicz M.

Oceanological and Hydrobiological Studies

2007

Vol. 36, No.4

23-46

The Vistula Estuary is a coastal water body boasting free connection with the open sea, where mixing processes of marine and fluvial waters are maintained by local conditions. Based on results from a hydrodynamic model, applied to represent conditions in the year 1994, and using salinity as a tracer, it was found that fluvial water has a tendency to spread westward from the river mouth. This is in contradiction with the dominant wind direction in the region. Model results confirmed field observations of specific liydrological and meteorological conditions required to transport fluvial water northward, towards the Hel Peninsula.

Remarks on the morphology and the life cycle of Rhithropanopeus harrisii ssp tridentatus (maitland) from the dead Vistula River

Normant M., Miernik J., Szaniawska A.

Oceanological and Hydrobiological Studies

2004

Vol. 33, No. 4

93--102

The aim of this study was to characterize the mud crab Rhithropanopeus harrisii ssp. tridentatus that occurs in the Dead Vistula. Of the 220 specimens collected, 57% were males and 43% were females. Females with eggs on the pleopods were present throughout June, July and August. The carapace width varied from 4.9 mm to 22.4 mm and length ranged from 4.1 mm to 16.3 mm. The highest frequency (49.1%) was observed in the 9.1-13.5 mm width class. The wet weight of the specimens varied from 0.045 to 4.299 g. The results obtained indicate that no significant changes in the morphology or life cycle of the R. harrisii tridentatus from the Dead Vistula River have occurred in the last 30 years.