Effect by Mahmoud Elnakeeb
Dietary effect of powdered herbal seeds on zootechnical performance, hemato-biochemical indices, immunological status, and intestinal microbiota of European sea bass (Dicentrarchus labrax)
Aquaculture reports, Jun 1, 2024
Poor water quality as a trigger of harmful algal blooms in Lake Manzala
Mansoura Veterinary Medical Journal /Mansoura Veterinary Medical Journal, 2024
Brazilian Journal of Biology, 2023
This study aimed to assess the genetic differentiation and relationship among five sea cucumber s... more This study aimed to assess the genetic differentiation and relationship among five sea cucumber species from the Red Sea in Egypt, namely Holothuria atra, H. impatiens, H. leucospilota, Actinopyga crassa and A. mauritiana, using Inter Simple Sequence Repeated (ISSR) and Start Codon Targeted (SCoT) markers. A collection of 100 specimens, with 20 individuals per species, was gathered for the analysis. With ten ISSR primers, 135 amplified bands were detected, including 11 distinct species-specific bands, indicating high-level polymorphism among species. Using ten SCoT primers, 151 amplicons were generated, including 30 species-specific bands, with 52% polymorphic bands indicating high-level polymorphism among species. The degree of genetic similarity (GS) among the different genotypes of species was calculated based on ISSR bands analysis, which ranged from 93% between H. atra and H. impatiens to 86% between H. atra and A. crassa. The highest genetic similarity was observed between H. atra and H. impatiens (90%), while the lowest was identified between A. crassa and A. mauritiana (75%) using SCoT bands. Notably, the ISSR and SCoT-based DNA analysis revealed similar genetic relationships between H. atra and H. impatiens compared to other sea cucumber species studied. This study provides new insights into the genetic diversity and relationship among sea cucumber species in the Red Sea, which could have implications for their conservation and management.
Технологии пищевой и перерабатывающей промышленности АПК – продукты здорового питания, 2020
Реферат. Показана история акклиматизации американского веслоносана территории Совет ского Союза и... more Реферат. Показана история акклиматизации американского веслоносана территории Совет ского Союза и постсоветского пространства в качестве объекта зарыбления для водохранилищ и озёр регионов средней полосы и юга страны. Описан опыт четырех рыбоводных предприятий, первыми получивших личинок веслоноса из Америки и впервые проводивших исследования по выращиванию веслоноса в условиях бассейнов..Приводятся фамилии ведущих российских учёных, внесших значи тельный вклад в разработку технологий выращивания веслоноса: биологического обоснования аккли матизации веслоноса в СССР, технологий выращивания веслоноса, технологий формирования ре монтно-маточных стад веслоноса. Представлена биологическая характеристика веслоноса. Подробно описаны этапы аквакультурной интеграции веслоноса в СССР и постсоветских странах. Особое вни мание уделено вопросам изучения биологических особенностей веслоноса при его культивировании, в частности, темпа роста, выживаемости, показателей кормления, сроков полового созревания и дли тельности межнерестовых интервалов и др. Показано, что перспективно выращивать веслоноса, яв ляющегося зоопланктофагом, пастбищным способом в изолированных водоемах в поликультуре с бентофагами (осетровые рыбы), фитопланктофагами (белый толстолобик) и макрофитофагами (белый амур). Это позволяет очень эффективно использовать кормовую базу водоема и получать экономиче скую выгоду. Проанализированы причины того, что выращивание веслоноса не получило широкомас штабного развития в аквакультуре России и постсоветских стран. Указана необходимость расшире ния просветительской деятельности по увеличению потребительского спроса на продукцию из веслоноса.
A Comparative Assessment of Hematological Indicators of Paddlefish (Polyodon Spathula Walbaum, 1792) when Obtaining Mature Oocytes for Food and Fish-Breeding Purposes
Arid Ecosystems
Research of fish breeding, biological and hematological parameters of paddlefish Polyodon spathula (Walbaum, 1792) females, matured in pond conditions in Astrakhan region
Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries)
The fish-breeding, biological and hematological parameters of paddlefish females matured in the p... more The fish-breeding, biological and hematological parameters of paddlefish females matured in the pond conditions of the scientific and experimental aquaculture complex “BIOS” were investigated. The studies were carried out during the period of obtaining mature oocytes for fish breeding purposes. The reproductive function of female paddlefish was judged by the following parameters: body weight and timing of reaching sexual maturity, spawning intervals, egg yield, absolute and relative fecundity, percentage of fertilization and embryo development, and prelarvae yield. The physiological state of females was assessed according to the following parameters: white blood cell (WBC) count, hemoglobin concentration (Hb), total serum protein (TSP). The results obtained were compared with published data on female paddlefish in natural habitat and on females acclimatized in another region. Materials were obtained on paddlefish females, once and repeatedly ripened in the pond conditions of the Ast...
Current status of paddlefish aquaculture development, constraints and future prospects in the world and Russia: a brief review
Rybovodstvo i rybnoe hozâjstvo, Jan 10, 2022
STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. In the frame of the XXIII Agribusiness Forum of the South of Russia and the Exhibition «Interagromash» Volume 1, 2020
The cultivation of paddlefish underyearlings in polyculture with sturgeons (hybrid bester) in fis... more The cultivation of paddlefish underyearlings in polyculture with sturgeons (hybrid bester) in fish ponds was studied. The hydrochemical and hydrobiological parameters in ponds during the cultivation were investigated. A comparative assessment of the growth rates of paddlefish and bester underyearlings during one and two cycles pond cultivation has been performed. The results obtained indicate that two cycles cultivation allows you to increase the weight of the paddlefish by more than 2 times, the bester - by 1.4 times, compared with one cycle.
Paddlefish, Polyodon spathula: Historical, current status and future aquaculture prospects in Russia
International Aquatic Research, 2021
In the wild, overfishing, habitat loss, industrial and agriculture activity has led to the degrad... more In the wild, overfishing, habitat loss, industrial and agriculture activity has led to the degradation of freshwater habitats and, therefore, dramatically declines the Mississippi paddlefish (Polyodon spathula) stocks (Stone 2007). Paddlefish gain a growing commercial interest in the USSR/Russian Federation due to its ability to produce high-quality caviar. Also, it can be reared in polyculture ponds and a wide range of temperate reservoirs. Therefore, aquaculture of these valuable fish is necessary to meet consumer demand in Eastern European markets with flesh and caviar. Published information about the culture of paddlefish in the USSR/Russian Federation is scarce and not permanently available. Regarding our study, data were collected from English reports and translated Russian official statistics and studies. Also, FAO fisheries data from 1880 up to 2010 for paddlefish were included. Moreover, caviar production data and prices were surveyed from companies. The collected data could...
Egyptian Journal of Aquatic Biology and Fisheries
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Effect by Mahmoud Elnakeeb