Growth and production of three macrozoobenthic species in the Gulf of Riga, including comparisons with other areas

摘要: Three soft-bottom stations in the southern part of Gulf Riga were studied during period December 1993 to January 1995. The amphipods, Monoporeia affinis and Pontoporeia femorata, poychaete Marenzelleria viridis, analysed for production, using cohort growth method. Animals also carbon nitrogen content a CHN-analyser. Based on size measurements, quantitative data divided into age-classes each was calculated first as wet weight then converted content. Total annual production species well turnover ratios. ratio estimated at 1.3–1.7, which is lower than earlier reported from Baltic Proper. For femorata 1.6 same, or slightly more, Sea, but considerably what has been NW Atlantic. viridis two with stable populations between 0.4 0.5, while third station, growing population, value 1.0 calculated. These figures are those found German coastal lagoon, substantially values