degrading), with a given nature of elimination. Determination of the 

 growth and supporting components of the production process allows us to 

 produce a quantitative estimate of the disruption of the stability of 

 the population which has already occurred, since a disproportion in the 

 population of various generations may result from variations in their 

 supplementation by juveniles and differences in the rate of 

 elimination. Analysis of the relationships between P_, P^ and the 

 biomass of the population can be of significant interest for 

 determination of the possible stable catch. Obviously, the catch in any 

 case must be less than the supporting portion of the production 

 process. 



To illustrate the static-dynamic principle of calculation of 

 production on the basis of a single sample of a natural population, let 

 us present an example of simple determination of P„ (from the 

 calculation of the gradual elimination of individuals in successive 

 generations at the end of the analyzed time sector) and Pg, using 

 equation (4.8) (Table 16). 



The structure of the local population of Buccinum cyaneium van. 

 tenebrosum , used as our example, from a region in the shallow eastern 

 portion of the Barents Sea by the south island of Novoy Zemli, a region 

 favorable for this form, reflects the status of the population in early 

 fall. Analysis of the dimension-weight structure of the population, in 

 combination with a study of the morphologic characteristics of growth, 

 form the basis of determination of the rate of linear and weight growth 

 and the duration of life of individuals of the species under these 

 conditions (Figs. 29 and 30). Calculation of the growth production (Pg) 

 and its supporting portion (P^) for the population in question showed 

 that the value of Pg was 62.5, of P^ — 46.5 g/m per year with a biomass 

 of 130.6 g/m^. Calculation of the production by this method can be 

 reduced (with some decrease in accuracy) by averaging the weight gain of 

 individuals of each generation over the year. As we can see from Table 

 16, the population in question is not stable (with a single level of 

 elimination, supplementation of the population with juveniles differs 

 from year to year), but is in a satisfactory condition, and, judging 

 from the ratio Pq/Ps ^ 1.34/1, has a sufficient reserve to support 

 continued existence. 



The static-dynamic method was used to study the production 

 properties of a number of species of benthic invertebrates in many 

 regions (Golikov, 1970; Golikov, Scarlato, 1970; Golikov, Menshutkin, 

 1971, 1973; Sirenko, 1973; Tabunkov, 1973, 1974; Tsvetkova, 1974b; 

 Menshutkina, 1975; Yegorova, 1975). The results of these studies allow 

 us to analyze certain regularities in changes in the production process 

 of populations of a single species and biogeographically different 

 species in different sections in a body of water and in different 

 landscape-geographic zones. Species with similar characteristics of 

 dimensions and weight, in portions of a water area favorable for them, 

 have similar growth rate and life duration indices for individuals, and 

 frequently often comparable values of settlement density, rate of 

 elimination and production of each species. Naturally, the greatest 

 similarity with respect to these indicators is manifested by similar 



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