scholarly journals Epizootic aspects of young carp contamination with Dactylogyrosis in the ponds of the Orenburg region

2021 ◽  
Author(s):  
J.V. Kilyakova ◽  
E.P. Miroshnikova ◽  
A.E. Arinzhanov
Keyword(s):  
Close Contact ◽  
Fish Farming ◽  
Early Age ◽  
Young Fish ◽  
Orenburg Region ◽  
Development Cycle ◽  
Invasive Diseases ◽  
Complete Study ◽  
Gill Filaments ◽  
Favorable Conditions

Modern fish farming having intensive forms of farming provides for feeding fish with artificial feed, fertilizing ponds and compacting fish planting in nursery, finishing and wintering ponds. This leads to close contact of cultivated fish and, in this regard, favorable conditions for the pathogens accumulation in ponds, the distribution of infectious and invasive diseases. Invasive diseases are a significant danger among diseases including pond fish dactylogyrosis. Dactylogyrosis are monogenetic suckers, parasites with a direct development cycle, live on the fish gill filaments, belong to conditionally pathogenic parasites and pose a serious danger to young fish. Despite a fairly complete study of the biology of carp dactylogyrid, a number of questions regarding the formation of the parasitofauna of these young fish in the early stages of development - the most vulnerable period of their lives - remain little covered in the literature. The work presents data on the Dactylogyrus types found in young carp in the nursery ponds of the Orenburg region, the invasion extensiveness and intensity. 4 species of monogenetic suckers have been found: Dactylogyrus vastator, Dactylogyrus extensus, Dactylogyrus achmerowi, Dactylogyrus anchoratus. Among the four species of Dactylogyrosis, only two species, Dactylogyrus vastator and Dactylogyrus extensus, were found most often and from an early age, two other species were found in older fish, 20 and 25 days of age with little invasion extensiveness and intensity.

The rodents from the late middle Pleistocene hominid-bearing site of J'bel Irhoud, Morocco, and their chronological and paleoenvironmental implications

2013 ◽  
Vol 80 (3) ◽  
pp. 552-561 ◽  
Author(s):  
Denis Geraads ◽  
Fethi Amani ◽  
Abdelouahed Ben-Ncer ◽  
Shannon P. McPherron ◽  
Jean-Paul Raynal ◽  
...  
Keyword(s):  
North Africa ◽  
Mus Musculus ◽  
Diversity Indices ◽  
Middle Pleistocene ◽  
Early Age ◽  
Mus Spretus ◽  
Upper Pleistocene ◽  
Living Species ◽  
Favorable Conditions ◽  
Late Middle Pleistocene

The rodents from the late middle Pleistocene hominin-bearing locality of J'bel Irhoud include the following species: Meriones shawii, Gerbillus grandis, Dipodillus campestris, Paraethomys ras, Lemniscomys barbarus, Mus cf. spretus, and Eliomys sp. We consider M. shawii, a living species, as identical with the middle Pleistocene Meriones maghrebianus. The mouse differs from the domestic Mus musculus but does not clearly fit into Mus spretus, either. The rare G. grandis looks identical with the form from the middle Pleistocene of Thomas quarries, which may suggest a rather early age for Irhoud. This is in agreement with the occurrence of Paraethomys, a genus unknown in the upper Pleistocene of Morocco, but the absence of the arvicolid Ellobius suggests that the site is younger than other middle Pleistocene sites, Doukkala II, Sidi Abderrahmane D2, and Irhoud-Derbala-Virage. Paleoecological indicators, such as the taxonomic habitat spectrum, or the relative abundances of Gerbillinae and Murinae, suggest a less xeric environment than in many earlier and later sites. Diversity indices, comparable to those of other middle Pleistocene sites, point to similarly favorable conditions before the major climatic crisis close to the middle/upper Pleistocene boundary that drastically reduced rodent diversity in North Africa.

scholarly journals Survival of Young Sardines Flushed Out to Open Ocean

Eos ◽  
2015 ◽  
Vol 96 ◽  
Author(s):  
Julia Rosen
Keyword(s):  
Open Ocean ◽  
Young Fish ◽  
Favorable Conditions

Despite favorable conditions within eddies and streamers that form ideal habitats for larval sardines, the young fish may not survive when flushed into the open ocean.

scholarly journals Insecticidal Efficacy of Medicines During Cat Flea Infestations in Tyumen

2021 ◽  
Vol 14 (4) ◽  
pp. 2020-2024
Author(s):  
Dmitry S. Kruglov
Keyword(s):  
Insecticide Treatment ◽  
Cat Flea ◽  
Widespread Occurrence ◽  
Flea Infestation ◽  
Development Cycle ◽  
Insecticidal Efficacy ◽  
Invasive Diseases ◽  
Three Stages ◽  
Pet Owner ◽  
Shifting Boundaries

From time immemorial people began to domesticate wild animals and throughout many generations, they are kept by people genetically isolated from external pathogens. In the prevailing era, every pet owner is trying to breed and protect his animal from contagious and noncontagious diseases. Having said that, lack and inadequacy of knowledge and mass media on simple preventive measures results in the widespread occurrence of infectious and invasive diseases, including flea, Ctenocephalides felis infestation among dogs as well as cats. The present paper primarily attempts to present the results of therapeutic efficiency of Komfortis, Foresto, and Fitoelita medical agents used during flea infestation among domestic cats. In order to meet the purpose of the study, research was carried out within the framework of study and analysis of the epizootic state of invasive diseases of agricultural and unproductive animals, bees, and birds. Studies of changes in the species composition, and bioecological patterns of the development cycle of parasites under shifting boundaries of their ranges were also done. For the study, the animals were divided into three groups of 10 animals each. Standard clinical and hematological research methods were used during the study. Blood sampling included three stages: before insecticide treatment, the intermediate interval of 15 days, and the final stage. Based on the results obtained, it was found that Komfortis and Foresto have 100% therapeutic efficacy at all stages of flea development and possess a long-lasting action duringa flea infestation. The morphological blood analysisshowed that the proposed medical agents have no toxic orsideeffects.

scholarly journals Serological and Molecular Investigation of Brucellosis in Breeding Equids in Pakistani Punjab

Pathogens ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 673
Author(s):  
Amjad Hussain ◽  
Tariq Jamil ◽  
Abdul Malik Tareen ◽  
Falk Melzer ◽  
Muhammad Hammad Hussain ◽  
...  
Keyword(s):  
Risk Factors ◽  
Brucella Abortus ◽  
Real Time Pcr ◽  
Close Contact ◽  
Cross Sectional Study ◽  
Early Age ◽  
Sectional Study ◽  
Cross Sectional ◽  
Molecular Investigation ◽  
Dairy Milk

Brucellosis is an important zoonosis worldwide. Equines are susceptible to the infection when in close contact with infected animals. The objective of our study was to update the existing knowledge and detect and differentiate the causative agent of brucellosis in breeding equines in Punjab, Pakistan. A cross-sectional study was designed to evaluate the occurrence and etiology of the infection in the equine population in three districts. A total of 448 equine sera were collected from three prefectures viz. Sahiwal, Khanewal, and Okara of the Punjab Province of Pakistan. Ninety-six (21.4%) samples were found positive by RBPT, 3.56% (16/448) by iELISA, and 4.24% (19/448) by CFT. Real-time PCR demonstrated the presence of Brucella abortus-DNA in sero-positive samples. Age and location were found as risk factors. The study concludes equine brucellosis seroprevalence in the country where Brucella abortus as the main etiology. Fistulous withers and poll evil cases should be treated with care as they could be hazardous and a source of zoonotic transmission. Routine screening at an early age, vaccination in ruminants, and consumption of pasteurized dairy milk in humans is recommended for prevention of the infection. Specific tests need to be standardized and validated.

scholarly journals Strategy for trout feeding with Aller aqua feeds

2018 ◽  
Vol 20 (84) ◽  
Author(s):  
I. Y. Bobel ◽  
J. I. Pivtorak
Keyword(s):  
Growth Rate ◽  
Mouth Opening ◽  
Fish Farming ◽  
Maximum Growth ◽  
The Body ◽  
Feeding Strategies ◽  
Natural Food ◽  
Young Fish ◽  
Nitrogen And Phosphorus ◽  
The Impact

Due to the fact that the cost of forage for trout is up to 60% of all costs for its cultivation, the problem of rational use and saving has a special place. In the planned production the selection of the appropriate feed and feeding strategies are very important. Two extremely important coefficients of the indicator should be taken into consideration: coefficient of growth rate and fodder coefficient. The maximum growth rate is not correlates with the best fodder coefficient. All Allerg aqua production feeds are made in the form of ellipsoid granules. According to Aller aqua, the ellipsoid shape of the granules can significantly improve feed and, consequently, reduce its loss. When immersed in water, granular feeds at the expense of the ellipsoid form carry chaotic movements that attract fish to their capture. In addition, the granules of the ellipsoid form in the production process are better saturated with fat. Feeding trout it is necessary to take into account that the size of the granules for young fish in the length of 4–20 cm should be from 2.2 to 2.6% of the body length (according to Smith), which corresponds to the mouth opening size and the distance between the gill stamens in rainbow trout. The onset of feeding in time leads to the proper formation of the esophagus, which allows further intensive feeding. Provision of high quality fodder is one of the most important conditions for successful industrial fish farming. In conditions where the fish is devoid of natural food, the metabolism is controlled by humans and depends on the balance, quality and quantity of feed supplied to the fish. That is the reason of great opportunities for increasing the rate of growth of fish, with minimal expenses for mixed fodder, reducing the mortality of young fish, improving the quality of producers, and in general improving the efficiency of all fish farming processes. In order to determine with great accuracy the norms of feeding, it is necessary to carry out the control of weighing of fish. The size of the sample depends on the size of the pool and the amount of fish. The sampling should be from 50 to 100% of the general population in small containers and at least 1% in large pools. Fish is best fed often, in small portions. The smaller the fish, the more it needs to be fed. If necessary, it is needed to use special therapeutic granulated food or a mixture of therapeutic ingredients to add to the wet granules. Fish should be fed every day, since breaks lead to a decrease in its mass. It is necessary to create optimal conditions for cultivation and to carry out constant monitoring of water temperature and its fluctuations, oxygen content in water, pH, atmospheric pressure, etc. The impact of feed on the environment is also closely related to the value of the feed factor. The main products of fish metabolism that are isolated in aqueous medium, it is nitrogen and phosphorus. The Aller Aqua Feeding Program for trout includes the following: The amount of feed fed with trout depends on the temperature and size of the fish. These factors affect the amount of ration feeding.

scholarly journals NEW ASPECTS OF STRUGGLE AGAINST INVASIONS OF MAJOR OBJECTS OF BELARUS’ AQUACULTURE

2019 ◽  
pp. 102-107
Author(s):  
Bespalyy ◽  
Degtyaryk ◽  
Slobodnitskaja ◽  
Poloz ◽  
Grebneva
Keyword(s):  
Natural Water ◽  
Low Cost ◽  
Fish Farming ◽  
Water Source ◽  
Pond Water ◽  
Water Bodies ◽  
Fish Production ◽  
National Academy Of Sciences ◽  
Invasive Diseases ◽  
Natural Water Bodies

The article provides information on the most common invasive diseases of fish, which are the main objects of cultivation in aquaculture in Belarus, and information on new products developed by the employees of the RUE “Institute of Fisheries” RUE “Scientific and Practical Center of the National Academy of Sciences of Belarus for live stock breeding” to combat these invasions.Aquaculture of the Republic of Belarus is characterized by a global trend – an increase in fish production due to the cultivation of various types of fish in artificial conditions. In spite of the fact that today industrial-type enterprises are actively developing in Belarus (production is carried out under conditions of RAS or PSO), the main share of production, about 93%, falls on pond-type farms.Successful fulfillment of tasks to increase fish production, with constant pond fund areas, requires new solutions in such areas as working with new species of fish, conducting breeding work, developing balanced feed, improving fish farming technologies, studying microbiology and hydrobiology of ponds and so on.An important component of modern pond fish culture, which allows to significantly increase the yield and quality of fish products, is the ichthyopathological part. Due to the fact that production ponds have a close relationship with the biocenosis of natural water bodies, monitoring of invasive diseases in fish in both production ponds and the water source (the head pond, water sources flowing into it and nearby natural water bodies) comes to the fore. Monitoring of fish invasions in turn forms the need to develop ecological, highly efficient, and economically low-cost methods for the protection of pond fish.

scholarly journals Legal and piscicultural-technological decisions for fish-farming use of natural water bodies

2020 ◽  
Vol 175 ◽  
pp. 02002
Author(s):  
Nina Golovina ◽  
Sergey Kupinski ◽  
Elena Danilova ◽  
Pavel Golovin
Keyword(s):  
Growth Rate ◽  
Water Storage ◽  
Fish Farming ◽  
Water Bodies ◽  
Legal Rules ◽  
Bream Abramis Brama ◽  
Storage Reservoirs ◽  
The Russian Federation ◽  
Favorable Conditions ◽  
Natural Water Bodies

For fishery assessment of up-to-date state of three water storage reservoirs in the northern part of the Moscow area, classical methods of hydrobiological and ichthyological investigations were used, as well as echolocation and fish-farming plane-tables for calculation of growth possibilities of fish communities representatives. The low depths (average between 2 and 2.5 m) of the Yakhromskoe and Velevskoe water storage reservoirs create favorable conditions for intensive development of aquatic plants, they show greater similarities of ichthyofauna but the low growth rate, of the bream (Abramis brama) as the main object at the amateurish fishing. The Zhestylevskoe water storage reservoir, having the greatest area and depth (average 6 m depth) and the weed filling less than 5%, shows the bream growth rate higher than that one of the 2 other water bodies. The normative-legal rules of the Russian Federation permit to register officially fish cultural and fishing areas at water storage reservoirs of more than 100 hectare what allows to determine ways of their subsequent stable exploitation. On the example of the Yakhromskoe, Zhestylevskoe and Velevskoe water storage reservoirs , algorithms of reservoirs transference from one state into another one have been given with a view to use them intensively.

scholarly journals DESKRIPSI SUMBERDAYA PERIKANAN DESA TUMBAK MADANI KABUPATEN MINAHASA TENGGARA

2013 ◽  
Vol 1 (2) ◽  
pp. 60
Author(s):  
Hartarto Sormin ◽  
Djuwita R. R. Aling ◽  
Olvie V. Kotambunan
Keyword(s):  
Social Stratification ◽  
Close Contact ◽  
Fish Farming ◽  
Economic Resource ◽  
Fish Family ◽  
Fisheries Resources ◽  
North Sulawesi ◽  
The People ◽  
Coral Reef Area ◽  
Marine Fish Farming

DESKRIPSI SUMBERDAYA PERIKANAN DESA TUMBAK MADANI KABUPATEN MINAHASA TENGGARA1 Description of Fisheries Resources at Tumbak Madani Village, District Minahasa Tenggara Hartarto Sormin2, Djuwita RR Aling3, Olvie V Kotambunan3   ABSTRACT   This research is conducted to identify any potential resources in Tumbak Madani village, Pusomaen district, Minahasa Tenggara, North Sulawesi province. The methodology is using several case studies that are acquired by conducting an intensive close contact research with the people. The population of Tumbak Madani village is 512 people and consists of 249 females and 263 males. There are 109 people who received education and most of the villagers are fishermen about 130 people. As an Islamic village, Tumbak Madani has an Islamic social interaction and culture such as social stratification, ritual for new born baby and other cultural law. There are two social groups within the people that are women Islamic group and fishermen group. Coral reef area is the main economic resource for the people in Tumbak Madani village. The area is the habitat for 7 mangrove types and 53 fish family that divided into fish for consumption and fish for ornamental. Tourism and marine fish farming seem to be the next economic opportunity to explore all of Tumbak Madani resources.   Keywords : Tumbak Madani, potency, fishery resources, culture   ABSTRAK penelitian ini untuk mengetahui dan mengungkapkan apa saja potensi desa Tumbak Madani Kecamatan Pusomaen, Kabupaten Minahasa Tenggara, Provinsi Sulawesi Utara. Dasar penelitian yang digunakan studi kasus, yaitu salah satu tipe pendekatan dalam penelitian yang dilakukan secara intensif, mendalam, mendetail, dan komprehensif. Potensi Sumberdaya Manusia yang dimiliki oleh desa terdiri dari 512 jiwa, 249 wanita dan 263 pria, masyarakat desa paling banyak bermata pencaharian sebagai nelayan sebanyak 130 orang, agama yang mereka anut 100% beragama islam. Ada 2 Kelompok sosial di desa, kelompok pengajian ibu-ibu dan kelompok karya nelayan bagi pria.  Potensi Sumberdaya Perikanan yang dimiliki oleh desa meliputi terumbu karang yang berguna bagi desa yang berfungsi menghasilkan perekonomian bagi masyarakat desa dalam berperan penting dalam melestarikan ikan konsumsi dan ikan hias terdapat 53 family ikan yang ada di desa sehingga berpotensi untuk budidaya ikan air laut, selain terumbu karang desa Tumbak Madani juga memiliki 7 spesies tumbuhan mangrove, yang telah dimanfaatkan untuk membuat pagar dan juga kayu api untuk memasak dan juga berpotensi sebagai potensi pariwisata.   Kata kunci : Tumbak Madani, potensi, sumberdaya perikanan, budaya 1 Bagian dari skripsi 2 Mahasiswa Program Studi Agrobisnis Perikanan FPIK-UNSRAT 3 Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals Application of Texture and Fractal Dimension Analysis to Evaluate Subgingival Cement Surfaces in Terms of Biocompatibility

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5857
Author(s):  
Katarzyna Skośkiewicz-Malinowska ◽  
Martyna Mysior ◽  
Agnieszka Rusak ◽  
Piotr Kuropka ◽  
Marcin Kozakiewicz ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
Czech Republic ◽  
Close Contact ◽  
Glass Ionomer ◽  
Research Material ◽  
Dimension Analysis ◽  
Long Time ◽  
Fractal Dimension Analysis ◽  
Living Tissues ◽  
Favorable Conditions

Biocompatibility is defined as “the ability of a biomaterial, prosthesis, or medical device to perform with an appropriate host response in a specific application”. Biocompatibility is especially important for restorative dentists as they use materials that remain in close contact with living tissues for a long time. The research material involves six types of cement used frequently in the subgingival region: Ketac Fil Plus (3M ESPE, Germany), Riva Self Cure (SDI, Australia) (Glass Ionomer Cements), Breeze (Pentron Clinical, USA) (Resin-based Cement), Adhesor Carbofine (Pentron, Czech Republic), Harvard Polycarboxylat Cement (Harvard Dental, Great Britain) (Zinc polycarboxylate types of cement) and Agatos S (Chema-Elektromet, Poland) (Zinc Phosphate Cement). Texture and fractal dimension analysis was applied. An evaluation of cytotoxicity and cell adhesion was carried out. The fractal dimension of Breeze (Pentron Clinical, USA) differed in each of the tested types of cement. Adhesor Carbofine (Pentron, Czech Republic) cytotoxicity was rated 4 on a 0–4 scale. The Ketac Fil Plus (3M ESPE, Germany) and Riva Self Cure (SDI, Australia) cements showed the most favorable conditions for the adhesion of fibroblasts, despite statistically significant differences in the fractal dimension of their surfaces.

Remarks on the seasonal occurrence and identification of young plasmodial stages of Myxobolus spp. Infecting cyprinid fishes in Hungary

2012 ◽  
Vol 60 (1) ◽  
pp. 69-82
Author(s):  
Kálmán Molnár ◽  
Gábor Cech ◽  
Csaba Székely
Keyword(s):  
Developmental Stages ◽  
Close Contact ◽  
Rutilus Rutilus ◽  
Early Summer ◽  
Spore Formation ◽  
Rdna Sequences ◽  
Gill Filaments ◽  
Cyprinid Fishes ◽  
Gill Lamellae ◽  
Leuciscus Idus

During a survey on the Myxobolus infection of two cyprinid fishes, the ide (Leuciscus idus) and the roach (Rutilus rutilus), myxosporean developmental stages were found around the arteries of the gill filaments and in the gill lamellae. An analysis of the 18S rDNA sequences of these stages revealed that plasmodia developing in the ide belonged to Myxobolus elegans, those developing in the gill lamellae of the roach corresponded to M. intimus, while plasmodia developing in close contact with the cartilaginous gill rays proved to be developmental stages of M. feisti. A strict seasonal cycle with a very long intrapiscine development was recorded for M. elegans and M. intimus. Developing plasmodia of the latter Myxobolus spp. occurred from early summer to next spring, and spore formation took place only in April. No seasonality associated with M. feisti infections was found. Developing plasmodia and mature spores of this species occurred simultaneously in different seasons of the year. Myxobolus feisti spore formation always occurred in close contact with the cartilaginous tissue of the gill filaments but spores were rarely encapsulated in the cartilaginous gill rays.

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