AGRIS - 

Data provenance by Country

2020

Kozlova, N.V. | Dubovskaya, A.V. | Makarova, E.G. | Markina, I.A. | Nikitin, F.I., All-Russia Reseach and Development Inst. of Fishery and Oceanography. Volga-Caspian Branch, Astrakhan

The study of the physiological and biochemical parameters of golden mullet (Liza aurata, Risso), one of commercial gray mullet fishes acclimated in the Caspian Sea was carried out. Collecting material was carried out in the western part of the Northern and Middle Caspian in September-October 2019. The female and male species were analyzed. The histomorphological investigation of the gonads of females and males indicated the completion of spawning. The morphological picture of the gonads of golden mullet of both sexes corresponded to the maturity scale of this species as applied to the Caspian region. In the blood there was determined the concentration of hemoglobin, total serum protein, total lipids, triglycerides, cholesterol, glucose, and inorganic phosphorus. A valid positive correlation dependence (p less than 0.05) of weight and length of females (r = 0.9340) and males (r = 0.9320) was stated. In females high correlations were recorded between the levels of total serum protein and cholesterol (r = 0.9071), total serum protein and hemoglobin (r =0.9706), glucose and hemoglobin (r = 0.8897) with a statistical significance level of p less 0.05. The revealed statistical dependencies of physiological and biochemical parameters of fish blood indicated their important role in the body in optimizing the total energy costs after spawning. According to the study of males, there has been found a high (r = 0.9195) significant (p less than 0.05) correlation relationship between the content of hemoglobin and cholesterol in the blood. The content of total lipids in muscles, gonads and liver of females and males of golden mullet were comparable. The levels of water-soluble protein in the muscles, liver, and gonads of fish of both sexes did not differ significantly. The obtained research results on the complex of physiological and biochemical parameters of golden mullet will significantly increase the volume of reliable information about the physiological status of the organism of the studied species gray mullet fishes in the modern ecological conditions of the Caspian Sea. | Проведено исследование физиолого-биохимических показателей сингиля (Liza aurata, Risso) – одного из промысловых видов кефалей, акклиматизированных в Каспийском море. Сбор материала проводили в западной части Северного и Среднего Каспия в сентябре-октябре 2019 г. Анализу подверглись самки и самцы. Результаты гистоморфологического исследования половых желез самок и самцов свидетельствовали о завершении нереста. Морфологическая картина гонад кефали обоих полов соответствовала шкале зрелости данного вида применительно к Каспийскому региону. В крови определяли содержание гемоглобина, общего сывороточного белка, общих липидов, триглицеридов, холестерина, глюкозы, неорганического фосфора. Отмечена достоверная корреляционная положительная зависимость (p меньше 0,05) массы и длины самок (r = 0,9340) и самцов (r = 0,9320). У самок зарегистрированы высокие корреляционные зависимости между уровнями общего сывороточного белка и холестерина (r = 0,9071), общего сывороточного белка и гемоглобина (r = 0,9706), глюкозы и гемоглобина (r = 0,8897) при уровне статистической значимости p меньше 0,05. Выявленные статистические зависимости физиолого-биохимических показателей крови рыб свидетельствовали об их важной роли в организме, заключающейся в оптимизации общих энергетических затрат после нереста. По результатам исследования самцов выявлена высокая (r = 0,9195) достоверная (p меньше 0,05) корреляционная зависимость между содержанием гемоглобина и холестерина в крови. Содержание общих липидов в мышцах, гонадах и печени самок и самцов сингиля было сопоставимо. Уровни водорастворимого белка в мышцах, печени и гонадах рыб обоих полов достоверно не различались. Полученные результаты исследований по комплексу физиолого-биохимических показателей сингиля позволят существенно увеличить объем достоверной информации о физиологическом статусе организма изученного вида кефалевых рыб в современных экологических условиях Каспийского моря.

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Central Scientific Agricultural Library - Russian Federation

2017

Baymishev, Kh.B. | Baymishev, M.Kh. | Pristyazhnyuk, O.N.

the study of the morphology of the structures of the genital organs of the heifers in the conditions of industrial technology of milk production with newborns to 18 months of age found that the ovary of the newborn heifers are covered with a single layer of cubic epithelium with densely distributed nuclei, the surface of the ovary and plicate infogeneral in the tunica albuginea. Morphogenesis of the ovary and fallopian tubes pussy has the age features. The growth rate of the ovary is determined, the period from birth to 6 months of age, and fallopian tubes with 6 to 12 months of age. The content of heifers under conditions of insufficient motor activity affects the morphology of the venous vessels, causing them congestion, hyperemia, dilectio.

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Modern Science Success - Russian Federation

2016

Safronov, A.S. | Filippova, O.P. | Zuevskij, S.E. | Burlachenko, I.V. | Ezhkin, M.A. | Sukhover, K.V., All-Russia Reseach and Development Inst. of Fishery and Oceanography, Moscow

The studies were conducted in 2015–2016 in the experimental fish breeding complex. Obtained interspecific hybrids of sturgeon between Bester Huso huso x Acipenser ruthenus and stellate sturgeon Acipenser stellatus, and between Bester and Russian sturgeon Acipenser gueldenstaedtii were grown up to one year. Hybrids between Bester and Russian sturgeon ahead parental lines on the growth rate. It remains an open question of male sterility of the hybrids as hybrids were found with gonads at maturity stage I–II, which were developed on the male pattern. In this hybrid species dispersion was observed in body weight. Hybrids between Bester and stellate sturgeon on the growth rate ahead of stellate sturgeon, keeping her morphological similarity. The hybrid is fertile, as identified females and males with the correct development of the gonads. Oogenesis of hybrid is faster than the stellate sturgeon in the similar conditions of cultivation. The one-year experience in the cultivation of above-mentioned hybrids allows us to recommend them as a substitute for Russian sturgeon and stellate sturgeon for obtaining marketable fish in a warm-water farms. | Исследования проводились в 2015-2016 гг. в условиях экспериментального рыбоводного комплекса. В течение 1 года выращивали межвидовые гибриды осетровых рыб на основе бестера (Huso huso x Acipenser ruthenus). Гибрид между бестером и русским осетром (Acipenser gueldenstaedtii) опережал родительские формы по темпу роста. Остается открытым вопрос о стерильности самцов этого гибрида, т.к. были обнаружены особи, с гонадами на стадии зрелости I-II, которые развивались по самцовому типу. У данного гибрида наблюдалась высокая изменчивость особей по массе тела. Гибрид между бестером и севрюгой (Acipenser stellatus) по темпу роста опережал севрюгу, сохраняя с ней морфологическое сходство. Гибрид является фертильным, т.к. обнаружены самки и самцы с правильным развитием гонад. Оогенез у гибрида протекает быстрее, чем у севрюги в аналогичных условиях содержания. Опыт выращивания межвидовых гибридов осетровых на основе бестера позволяет рекомендовать их для получения товарной рыбы в условиях тепловодных хозяйств в качестве полноценной замены русского осетра и севрюги.

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Central Scientific Agricultural Library - Russian Federation

2015

Metallov, G.F. | Ponomareva, E.N. | Geraskin, P.P., Astrakhan State Technical Univ.

The methods of visual and tool assessment of the sturgeon reproductive system condition are generally applied in the contemporary diagnostics of the maturity degree of sturgeon breeders. These methods are insufficiently effective and can lead to loss of fish-breeding production. The paper presents the data of the dynamics of the indicators of the protein, fatty, oxidizing and water-salt exchanges in the process of hybrid breeders' maturation grown up in the recirculating system. The analysis of the long-term researches of water-salt exchange of sturgeon showed that natural maturing of gonads causes profound changes of regulation of metabolism of water and electrolytes. Carrying out hormone stimulation of maturing leads to insignificant decrease in osmolality of blood serum in comparison with its values of naturally spawning fishes. The concentrations of osmotically active agents in blood serum and urine of the studied breeders and the juvenile of the Russian sturgeon, beluga and hybrid sterlet x beluga were examined, as the main indicator for the subsequent development of the maturity test. As a result of the experimental works, it is shown that the mature females of the hybrid sterlet x beluga have almost twice higher concentration of osmotically active agents in urine at the II stage of maturity of gonads than the unmature individuals, while mature females at the IV stage of maturity of gonads differ in osmolality of urine from young and unmature fishes by 3 and 1.4 times respectively. The possibility of use of osmolality (salinity) of urine as the most technological diagnostic test of degree of a maturity of females of the hybrid sterlet x beluga is considered for the first time. | В современной диагностике степени зрелости производителей осетровых рыб применяются в основном методы визуально-инструментальной оценки состояния их репродуктивной системы. Эти методы недостаточно эффективны и могут приводить к потере рыбоводной продукции. Проанализирована динамика показателей, характеризующих состояние белкового, жирового, окислительного и водно-солевого обмена у производителей стербела, выращенных в установке замкнутого водоснабжения в процессе созревания. Анализ результатов многолетних исследований водно-солевого обмена у осетровых рыб показал, что естественное созревание гонад вызывает глубокие изменения регуляции метаболизма воды и электролитов. Проведение гормональной стимуляции созревания приводит к незначительному снижению осмоляльности сыворотки крови в сравнении с ее значениями у естественно нерестующих рыб. У исследованных производителей и молоди русского осетра (Acipenser gueldenstaedtii Brandt, 1833), белуги (Huso huso Linnaeus, 1758) и гибрида стерлядь x белуга (Acipenser ruthensis Linnaeus, 1758 x Huso huso Linnaeus, 1758) проводили определение в сыворотке крови и моче концентрации осмотически активных веществ, как основного показателя, для последующей разработки теста по определению стадии зрелости. В результате экспериментальных работ показано, что у половозрелых самок гибрида стерлядь x белуга на II стадии зрелости гонад концентрация осмотически активных веществ в моче почти в 2 раза выше, чем у неполовозрелых особей, а половозрелые самки на IV стадии зрелости гонад отличаются по осмоляльности мочи от молодых и незрелых взрослых особей в 3 и 1,4 раза соответственно. Впервые рассматривается возможность применения осмоляльности мочи в качестве наиболее технологичного диагностического теста степени зрелости самок гибрида стерлядь x белуга.

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Central Scientific Agricultural Library - Russian Federation

2015

Tochilina, T.G. | Smirnov, B.P.

The data on some morphometric parameters, growth rate, morphology of gonads, and also the analysis of scales and otoliths of mature pink salmon juveniles caught in coastal waters of the Iturup Island during autumn, 2009, are presented. Mature pink salmon juveniles at stages V and V‒VI of their gonad maturity are met in waters of the Iturup Island. They constitute only a thousandth part of the total pink salmon abundance. By their biological characteristics these juveniles correspond to adult individuals of fishery stock and can participate in spawning together with fish at age 1+. From the point of view of their morphometric parameters, mature juveniles of the Iturup Island differ from normal adults by short but high head, short lower jaw and long upper jaw, and also by weight and body length. The analysis of scleritogramms of mature juveniles and adults at age of 1+ in the first year of growth did not reveal any essential differences in their growth rate. The thermal otolith marks of Japanese pink salmon released from Ichani salmon hatchery (Hokkaido) were presented in two individual of mature pink salmon juveniles. The phenomenon of early maturation requires a more careful study, with the use of genetic material

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Russian Federal Research Institute of Fisheries and Oceanography - Russian Federation

2014

Leskova, S.E. | Matrosova, I.V. | Rybnikova, I.G.

This article provides data on the size and age pattern of the habitations, quantity characteristics of linear growth and biomass growth and reproductive cycle features of Ruditapes philippinarium in Amur Bay. The data on histological maker and cell composition of investigated mollusks’ reproductive glands are shown to update the information on reproductive biology of Ruditapes philippinarium

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Russian Federal Research Institute of Fisheries and Oceanography - Russian Federation

2013

Sergeeva, S.G. | Kornienko, G.G. | Samarskaya, E.A. | Shishkina, I.V. | Tsema, N.I.

Results are presented of studies on physiology and maturation of red mullet and whiting that were conducted in 2009-2011. Prolonged spawning of the fish affects their metabolic characteristics. High content of proteins, fats and carotinoids necessary for gametogenesis is kept in the liver and muscles of red mullet. High content of fats in liver (77%) is typical for whiting with its almost all-year-round spawning. Continuous type of vitellogenesis and the fractional type of spawning determine the great amount of yolk oocytes of different size and the maturation of reserved oocytes.

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Russian Federal Research Institute of Fisheries and Oceanography - Russian Federation

2010

Piyanova, S.V. | Petrov, A.F.

The results of histological analysis of female and male gonads of the Antarctic toothfish (Dissostichus mawsoni), caught by the longliner in the Amundsen Sea in February 2007 are presented. The morphological parameters of fish, GSI, HepSI, condition indexes and fecundity have been described. The majority of Antarctic toothfish individuals have reached prespawning condition. Share of female with gonads at IV stages of maturity was 83,3%, and males 55%. The females with ovaries at IV-V stage and matured oocytes with diameter 6 484·10-6 m have been caught. Therefore, some individuals of Antarctic toothfish were ready to spawn in the Amundsen Sea by March

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Russian Federal Research Institute of Fisheries and Oceanography - Russian Federation