. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. ? 3 10 12 /4 16 Id 20 28 Cm. 30 50 70 90 110 130 /SO 170 190 210 230 Clll. 100 80 60 40 20 0 {Crust a. Cordylophora 30 50 10 90 110 130 150 ?? 190 200 gr. % /00 60 40 20\ 0 ? \Crustacea +*«.x'*"*" Corophiidae Gobijdae Clupeidae Vi 5 10 IS 20 25 30 35 40 45 SO 55 60 ?1?. Fig. 299. Change of diet with age of some Caspian Sea fish (Schorygin). / Vobla; // Benthophilus macrocephalus; /// Gobius kessleri; IV Sturgeon; V Caspialosa saposhnikovi; VI Pike perch. connected with the approach of sex
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. ? 3 10 12 /4 16 Id 20 28 Cm. 30 50 70 90 110 130 /SO 170 190 210 230 Clll. 100 80 60 40 20 0 {Crust a. Cordylophora 30 50 10 90 110 130 150 ?? 190 200 gr. % /00 60 40 20\ 0 ? \Crustacea +*«.x'*"*" Corophiidae Gobijdae Clupeidae Vi 5 10 IS 20 25 30 35 40 45 SO 55 60 ?1?. Fig. 299. Change of diet with age of some Caspian Sea fish (Schorygin). / Vobla; // Benthophilus macrocephalus; /// Gobius kessleri; IV Sturgeon; V Caspialosa saposhnikovi; VI Pike perch. connected with the approach of sexual maturity. Generally speaking sturgeon is a typical euryphague. Competition for food. The examination of the inter-relation in feeding among the different species is one of the essential problems in the study of fish nutri- tion ; moreover, as has been noted by Schorygin it is equally important ' to establish between which species, where, when, and for which foodstuffs such competition arises, and also, if possible, to determine the degree of competi- tion. It is equally important to study the nature of the effect of the consumers. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zenkevich, L. A. (Lev Aleksandrovich), 1889-1970. New York, Interscience Publishers
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