Journal of IchthyologyJournal of IchthyologyВопросы ихтиологии0042-87523034-5146The Russian Academy of Sciences65039910.31857/S0042875223020145UPVPIUArticlesСтатьиUnknownAge, Growth, Maturation and Mortality of Picarel Spicara flexuosa (Sparidae) from the Crimea Water Area (Black Sea)Возраст, рост, созревание и смертность спикары Spicara flexuosa (Sparidae) из акватории Крыма (Чёрное море)KutsynD. N.КуцынД. Н.makaira88@gmail.comKovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences, Sevastopol, RussiaИнститут биологии южных морей РАН – ИнБЮМ РАН0105202363330331531012025Copyright ©; 2023, Д.Н. КуцынCopyright ©; 2023, Д.Н. Куцын2023Д.Н. КуцынД.Н. Куцынhttps://transsyst.ru/0042-8752/article/view/650399

The results of the study of the sex and size-age structure, growth, maturation, sexual inversion, dynamics of the gonadosomatic index and mortality of 1948 individuals of the picarel Spicara flexuosa caught in the Crimea water area in 2020–2021 are presented. The total sex ratio in catches is biased towards females (3.5 : 1.0); sex inversion was recorded in 50% of females with a total body length of 13.5 ± 0.05 cm at the age of 3+. The maximum length of females is 15.1 cm, males, 22.0 cm; the weight is 29.0 and 132.2 g, respectively. The maximum age of females and males is 4 and 7 years, respectively. The values of the parameters of the von Bertalanffy equation are calculated: for females, the asymptotic length is 15.69 cm, the asymptotic weight is 32.0 g, the growth coefficient is 0.49 year–1; for males, 18.32 cm, 59.7 g and 0.44 year–1, respectively. A value of the exponent in the length-weight relationship is 2.68 for females (negative allometry) and 3.0 for males (isometry). The sexual maturity of 50% of females occurs at a length of 10.34 ± 0.21 cm at the age of 1+. The peak of spawning occurs in June. The rates of total, natural and fishing mortality are 1.2, 1.9 and 0.3 year–1, respectively in both sexes; the exploitation rate is 0.25, which indicates a low fishing pressure. It is established that S. flexuosa from northern populations is characterized by larger maximum sizes, a higher growth rate and a longer life expectancy

Приведены результаты исследования половой и размерно-возрастной структуры, роста, созревания, половой инверсии, динамики гонадосоматического индекса и смертности 1948 экз. спикары Spicara flexuosa, выловленных в акватории Крыма в 2020–2021 гг. Общее соотношение полов в уловах смещено в сторону самок (3.5 : 1.0), инверсия пола у 50% самок отмечена при общей длине тела 13.5 ± 0.05 см в возрасте 3+. Максимальная длина самок составляет 15.1 см, самцов – 22.0 см; масса – соответственно 29.0 и 132.2 г. Предельный возраст самок и самцов – соответственно 4 и 7 лет. Рассчитаны значения параметров уравнения Берталанфи: для самок асимптотическая длина составляет 15.69 см, асимптотическая масса – 32.0 г, константа роста – 0.49 год–1; для самцов – соответственно 18.32 см, 59.7 г и 0.44 год–1. Значение показателя степени в уравнении зависимости массы от длины для самок составляет 2.68 (отрицательная аллометрия), для самцов – 3.00 (изометрия). Созревание 50% самок происходит при длине 10.34 ± 0.21 см в возрасте 1+. Пик нереста приходится на июнь. Коэффициенты общей, естественной и промысловой смертности для обоих полов – соответственно 1.2, 1.9 и 0.3 год–1; коэффициент эксплуатации – 0.25, что свидетельствует о низкой промысловой нагрузке. Установлено, что для S. flexuosa северных популяций характерны бо́льшие максимальные размеры, более высокий темп роста и бо́льшая продолжительность жизни.

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