Variations in lipid, protein and carbohydrate contents of Enteromorpha spp. were examined over a seven-month period from April to October 1993. The samples were collected from seven sampling stations along the Gulf of Gda/nsk coast. The lipid content was low and varied slightly from 3.47 š 1.76% of DW at Puck to 4.36 š 2.17% of DW at Rewa and Cha/lupy. The protein content varied from 9.42 š 4.62% of DW at Puck to 20.60 š 5.00% of DW at Jurata. At the remaining stations the values vary over a narrow range. The maximum protein contents were recorded at the beginning and end of the growing season. The level of carbohydrate was very high compared to that of lipid and protein and varied from 29.09 š 6.44% of DW at Oslonino to 39.81 š 11.15% of DW at Puck. Seasonal carbohydrate changes were noted at all sampling stations, the minimum occurring in spring and autumn and the maximum in summer.
The variations in distribution, species composition, biomass and water content of Entero-morpha spp. in the Gulf of Gdansk in relation to sampling stations and season are discussed. Only four Entero-morpha species were identified in the samples collected, the most frequent being E. intestinalis (L.) Link. The species composition was found to vary in relation to sampling stations and seasons. The abundance of Enteromorpha spp. varied at different stations with a maximum at Puck variations in biomass were observed. Although Enteromorpha spp. were characterised by a high water content (96.56?0.40% of WW), no statistically significant variations in the water contents of these species with respect to sampling stations could be detected. Although there was a tendency towards seasonal changes, these occurred within a narrow range.
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