of rli stri hution of many species of Heep-water benthic invertebrates, 

 most of which are deposit-feerlers. 



Table 10. Weight characteristics of macrobenthos of eutrophic and 

 oliqotrophic regions of the Pacific Ocean floor, based on trawl catches, 

 frame width ?.5 m. 



Weight of microbenthos in 



No. of trawl catch, q 



Trophic areas samples Mean Range 



Eutrophi c 



Pericontinental 



Oceanic 



Fquatorial 



01 i gotrophic 



Northern 7 1.49± 0.39 6.09-0.08 



Southern 10 0.39± 0.018 1.06-0.01 



Table 11. Frequency of occurrence of basic systematic groups of 

 meiobenthos {%) and mean biomass of meiobenthos in oliqotrophic and 

 eutrophic reqions of the Pacific Ocean (Sokolova, 1970). 



Oliqotrophic Eutrophic 



Group regions regions 



Sponqia 33 60 



Mematoda 9 7 



Polychaeta (family Serpulidae) 5 27 



Polychaeta (detritophagous) 19 20 



Isopoda - 27 



Tanaidacea 24 27 



Scaphopoda - 7 



Sipunculida - 7 



Pryozoa 14 7 



Ascidiacea - 7 



Mean Biomass, g/m^ 0.007±0.002 0.024±0.004 



Number of samples 15 12 



224 



