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151.
Uttam K. Sarkar Lianthuamluaia Lianthuamluaia Debabrata Panda Suman Kumari Pranaya K. Parida Gunjan Karnatak Puthiyottil Mishal 《Fisheries Management and Ecology》2020,27(5):481-489
The present study investigates the success of stocking fingerlings of Indian major carps ‐Gibelion catla (Hamilton), Labeo rohita Hamilton and Cirrhinus mrigala Hamilton – to enhance fish yield in 58 small reservoirs in Odisha State, India. Fish stocking and yield data were collected from State Fisheries Department, Odisha. The relationships between area, stocking density and fish yield of different size groups of reservoirs were assessed using the Pearson correlation coefficient (r). Fish yield increased significantly (p < 0.05, t‐test) from 204 kg/ha/year in 2012–13 to 323 kg/ha/year in 2013–14 due to adoption of CBF. The corresponding per capita fish production increased from 398 kg fisher?1 year?1 to 702 kg fisher?1 year?1 benefitting more than 8,000 fisher households. Reservoirs in the size group 100–500 ha showed the highest response of fish yield with respect to stocking of fingerlings. The size of fingerlings at stocking and area of the reservoir had greater impact on enhancing fish yield. Stocking had a profound positive impact on fish yield. This study forms a baseline evaluation of the impact of stocking on small tropical reservoirs in India. It also recommends management measures and discusses issues, and the way forward for sustainable fisheries enhancement in small tropical reservoirs in eastern India. 相似文献
152.
Shahram Shakiba Zadeh Che Roos Saad Annie Christianus Mohd Salleh Kamarudin Kamaruzaman Sijam Mariana Nor Shamsudin Vasantha Kumari Neela 《Aquaculture International》2010,18(6):1017-1026
To conquer disease problem in shrimp industries, probiotic biocontrol is a well-known remedy now. The antagonistic ability
of separated isolates from different parts of juvenile P. monodon was screened against shrimp Vibrio pathogens, V. parahaemolyticus and V. alginolyticus. The most antagonistic effect was observed for an isolate that primarily identified as Shewanella algae using conventional method followed by Biolog GN and GP microplates. Since adaptability to the host optimum cultural condition
of the target organism is of the great importance, response surface methodology, with central composite design, was applied
to assess log cell count response of S. algae in different incubation conditions. Therefore, four independent variables were assumed as: temperature (10–50°C), pH (6–10),
NaCl concentration (0–50‰) and time (12–60 h). The coefficients of multiple determinations (R
2) for the responses log cell count of S. algae being 0.827. Temperature was the merely significant independent variable that affected the log cell count of the candidate
probiotic. The candidate probiotic was revealed a reasonable growth response in quite wide range of temperature, pH and NaCl
concentration in which the maximum levels were in same range of optimum shrimp culture. 相似文献
153.
Usha Kumari Neeraj Verma Ashwini Kumar Nigam Swati Mittal Ajay Kumar Mittal 《Aquaculture Research》2017,48(5):2411-2427
In this investigation, the effect of dietary administration of curcumin on the healing of skin wound in fish, Labeo rohita, has been reported. Fish were divided into three groups: control group (fish without skin wound), sham group (fish with skin wound without curcumin treatment) and curcumin‐treated group (fish with skin wound and subjected to dietary administration of 1% curcumin). Experiments were conducted for 30 days to assess the healing of skin wounds at different time intervals using scanning electron microscopy, histology, and mucopolysaccharide and enzyme histochemistry. In the curcumin‐treated group, healing of skin wounds was found to be enhanced than in the sham group as indicated by early restoration of morphology of the surface layer of epithelial cells; the density of the mucous goblet cells; the density of club cells in epidermal layer; and early granular tissue formation, collagen deposition and tissue remodelling in dermal layer. Furthermore, peroxidase and catalase enzyme activity showed increased endogenous defence system in the curcumin‐treated group compared with the sham group. It could be concluded that dietary administration of curcumin is beneficial in rapid healing of skin wounds in fish. Early healing of wounds could be considered to prevent the invasion of pathogens and to maintain the integrity of the surrounding tissue. 相似文献
154.
Nitrogen (N) supply is the major limiting nutrient in most reclamation schemes. In reclaimed mine soil (RMS), examining the N dynamics can be especially informative for understanding constraints on recovery that restrict revegetation success. Scholarly studies worldwide have focused on exogenous N incorporation to alleviate N shortages in the agriculture, and forestry sectors. Currently, growing concerns for the negative consequences of mining have highlighted N deficiency as one of the most significantly identified abiotic limits. Only a few researchers have focused on the N transformation mechanisms in drastically altered mine soils. The review comprises the last 10 years’ research on mine reclamation approaches using legume and non-legume plant communities. Also the capacity of different amendments to alleviate N shortages in mine soils is emphasized. The major findings of the present review suggest: (i) Revegetation using legume and non-legume species is a self-sustaining and economical alternative to mineral N fertilizer application; however, they cannot fully activate the biological N cycle in RMS. (ii) A more biological amendment-assisted revegetation would enhance the key concepts of “soil-biomass N balance” and would be ideal for N recovery in imbalanced mine soil. Altogether, grass-legume seeding offers a potentially valuable mine reclamation tool for managing N and addressing the challenges of sustainable development. 相似文献