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Lukas fish (Puntius bramoides) is one of the common fishery resources in the Banyumaswaters. Lukas fish was domesticated and has an economic value. Some species of Cyprinidae family like Lukas fish are become difficult to find in Serayu river. Accordingly, the reproductive technology study, such as cryopreservation are needed to keep these species exist in the wild. The purpose of this study was to determine the fertility of sperm Lukas fish in captivity. Fish sperm analysis was carried out by analyzing the sperm motility, viability and abnormalities, respectively. The results showed that the highest percentage of sperm motility, viability at 100x sperm dilution 84.71 ± 3.53%, 84.78 ± 1.41%, and the lowest percentage abnormalities 16 ± 2.07%. This result indicates that Lukas sperm has high fertility. The LSD test expresses the optimum sperm motility and viability showed significant differences at 100x milt dilution (p<0.05). [ABSTRACT FROM AUTHOR]

Hard plates covering fish body or scales, do not only serve as external protection, but are also important as one of the tools for species identification. This study was designed to recognise morphological characters of fish scales that can be used for identification and to comprehend the inter-specific variations of scales from different species by using selected indices from scale measurements; L1/1, L2/L, L1/L2, and W/L. Sixteen species of common freshwater fishes were sampled from a few localities in Peninsular Malaysia. Examinations were based on photographs to determine the scale morphologies. Basic distinguishable characteristics that were identified are type of scale, the overall shape, the position and shape of the focus, distribution of radii, and the circuli appearance. It was found that scale type and radii arrangement at the anterior field are two significant morphological features that could distinguish between Cyprinidae and other families. Main characters used to identify scales at species level are radii cover, structure of inter radial tongue, and radii arrangement. Meanwhile, multiple comparison tests to reveal inter-specific variations suggested that there are significant differences among 16 species of common freshwater fishes studied. Two indices were found to be suitable to highlight the significant differences (P<0.05) for all species which are index L1/L2 and index W/L. For all indices, species that showed significantly different with most of other species are Osteochilus vittatus, Pristolepis fasciata, Rasbora sumatrana, and Labeo rohita. The scales of Osteochilus vittatus showed significant values with most of other species in more than one index; index L1/L and index L2/L. The distinctive morphological character that distinguished it from other Cyprinidae species is having clearly formed serrations in the middle of the inter-radial tongue at the anterior region. [ABSTRACT FROM AUTHOR]

In 2005 the aquaculture activity in Romania was held on a total area of 1000.025 hectares of pisciculture systems, divided in 85% of hectares of fish breeding and 15% fish nurseries. Almost the entire surface has been used to increase cyprinid species, except for an area of 25 hectares used for salmoniculture. In 2015, from the statistics of the National Agency of Fisheries and Aquaculture of Romania results that there is an area of 102.356 hectares, of which 6.5% are nurseries and 93.5% are breedsers. Surface was kept about the same in this decade, but there was an increase in the weights of fish breeding in damage of fish nurseries. This is due to the need is to improve the quality of fishery production. Currently, aquaculture in Romania is being conducted mainly in freshwater and are characterized in terms of technology in two directions: intensive livestock (particularly salmonids) and an increase in extensive and semi-intensive ciprinidae in polyculture in ponds earth. Species structure and quality of fish production from Romanian aquaculture in 2005 was dominated by cyprinids, both indigenous and of Asian origin, representing 85% of the total, the remaining 15% being represented by trout, perch, pike, perch, catfish, sturgeon, etc. [ABSTRACT FROM AUTHOR]

Fishing is one of the oldest occupations and together with hunting it has had a significant economic and social importance during history. Nowadays fishing can be associated with biodiversity conservation, recreation and also with environmental and cultural psychology of the local population. Chondrostoma nasus (nase), a widespread reophilic fish species from the family Cyprinidae is considered at the criteria Least Concerned (LC) by the IUCN Red List being locally threatened in many areas of Europe by loss of suitable ecosystems. There is not much data in literature about fishing of nase as a part of local cultural tradition in South-Western Romania (Lugoj area). Direct observations in the field and qualitative research based on profound interviews were performed on the people who fish in the area. The interpretation of the results led to proposals for new legislative measures at the local level in order to help the preservation of the cultural traditions and also to address the environmental challenges and ethical issues related to the fishing nase in Timis River in the context of the present-day local socio-economic developments. [ABSTRACT FROM AUTHOR]

Aquaculture is a rapidly growing industry that is vital to supplying the increasing demand for food production worldwide. In recent decades, Aristichtys nobilis (Bighead carp) and Hypophthalmichthys molitrix (Silver carp) have been widely introduced into European waters for algal control and as a food source. This species are very sensitive to various environmental and physical stresses and thus more susceptible to bacterial invasions resulting in disease outbreak and mortality. The majority of bacterial fish pathogens are normally founded in the aquatic environment. Stressors from the aquaculture systems as handling, water quality and conditions, stocking density and inadequate nutrition, may predispose the fish to bacterial disease. The micromorphology of the epidermis of these two species was investigated by scanning electron microscopy (SEM). Normal and affected (lesions produced by bacterial infections) skin was investigated comparatively. The lesions were observed in order to investigate the invasion of bacteria in the skin tissue. The important role of the mucus in antibacterial defence was underlined. The loss of integrity of the epithelium, typical of this disease, is a portal of entry for bacterial or parasitic pathogens. [ABSTRACT FROM AUTHOR]