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Life cycles and population dynamics of marine benthic polychaetes from the disko bay area of west greenland


, : Life cycles and population dynamics of marine benthic polychaetes from the disko bay area of west greenland. Ophelia 16(1): 9-58

A time series of benthic samples obtained at 4 locations near Godhavn, Greenland, during 1959-1960 and in 1971 was analyzed to yield information on the life cycles and population characteristics of polychaetes inhabiting that subarctic marine area. Utilizing a population dynamics approach, production values were calculated for a common species, Terebellides stroemii, and the annual production-to-biomass ratio for this species was near unity. Biomass, and probably benthic production, appeared higher near exposed coasts than within the fjords. Reproductive modes were determined for 35 of the 48 spp. collected; 25 produced directly-developing or lecithotrophic larvae, 8 produced planktotrophic larvae, and 2 reproduced asexually. Planktotrophic species reproduced only in the spring and summer, but lecithotropic and direct forms propagated at all seasons of the year. This phenomenon is regarded as a means for dampening the potentially deleterious effects of extremes in food availability during the annual productive cycle of the subarctic marine ecosystem.

US$19.90

DOI: 10.1080/00785326.1977.10425460


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