A three year study was conducted in two floodplain lakes to evaluate changes between seasonal variation of water quality parameter and finfish diversity indices. Samples of water and fish specimens were collected ever...A three year study was conducted in two floodplain lakes to evaluate changes between seasonal variation of water quality parameter and finfish diversity indices. Samples of water and fish specimens were collected every month from three different stations of each lake to determine physico-chemical parameters of water and the finfish diversity indices. Split-plot and MANOVA designs, Multiplicative decomposition method and quadratic regression analysis were used to analyze the effects of the rate of changes between the parameters and sustainability of the lakes. The obtained results suggested that the impact of environmental change (e.g depth, conductivity, salinity of water etc.) on diversity indices was significant and should be taken into consideration when designing policies to increase the long-term sustainability of fishing activities in the lakes.展开更多
The use of chemotherapeutants, antibiotics, and pesticides in aqua farms and non-adherence to scientific management practices have resulted in adverse impact on aquacultural production, serious outbreaks of diseases, ...The use of chemotherapeutants, antibiotics, and pesticides in aqua farms and non-adherence to scientific management practices have resulted in adverse impact on aquacultural production, serious outbreaks of diseases, development of drug resistance in microbes, and accumulation of antibiotics and pesticide residues in finfish and shellfish and environmental pollution. As a result, a need has been felt by the aquaculturists as well as aquatic animal health management professionals to find a suitable alternative therapy in place of antibiotics and chemotherapy. Phytotherapy has come to be recognized as a handy and viable alternative to chemotherapy, as it is economical, effective, non-resistance forming, renewable, eco-friendly and farmer-friendly. Although the use of medicinal plants is known to humanity since the dawn of human civilization for the treatment and control of human and animal diseases but its importance in combating finfish and shellfish diseases has been realized only recently. The phytotherapy of aquacultural diseases is in its infancy in most part of the world except in China to some extent. However, many important contributions in this field by different workers during the last quarter of the 20th century and early 21st century have shown encouraging results and opened new vistas in phytotherapy of aquatic animals. The present review crtically evaluates the present status of knowledge of phytotherapy in the world combating various aquacultural diseases, identifying the bottlenecks and suggests remedial measures.展开更多
The finfish and shellfish resources were assessed quantitatively and qualitatively in regard to their abundance in creek waters at three sites within a period of two years, from January 1999 to December 2000, in the w...The finfish and shellfish resources were assessed quantitatively and qualitatively in regard to their abundance in creek waters at three sites within a period of two years, from January 1999 to December 2000, in the western mangrove areas of Kachchh. The catch rate varied from 0.69 to 6.99 kg h-1. It was low during monsoon (July to October), which could be due to the freshwater-flow-induced salinity reduction in all the sites. Among 38 species recorded, 5 were shellfish and 33 were finfish. The spawning period of fishes was found to be during summer and early monsoon period (May to August). Surface water temperatures varied from 17 ℃ to 37 ℃. Salinity values varied from 34 to 44 and the pH ranged between 7 and 8.9. Variation in dissolved oxygen content was from 3.42 to 5.85 mL L-1. The high fishery densities in these semi arid mangrove creek areas were recorded during monsoon and early winter season.展开更多
文摘A three year study was conducted in two floodplain lakes to evaluate changes between seasonal variation of water quality parameter and finfish diversity indices. Samples of water and fish specimens were collected every month from three different stations of each lake to determine physico-chemical parameters of water and the finfish diversity indices. Split-plot and MANOVA designs, Multiplicative decomposition method and quadratic regression analysis were used to analyze the effects of the rate of changes between the parameters and sustainability of the lakes. The obtained results suggested that the impact of environmental change (e.g depth, conductivity, salinity of water etc.) on diversity indices was significant and should be taken into consideration when designing policies to increase the long-term sustainability of fishing activities in the lakes.
文摘The use of chemotherapeutants, antibiotics, and pesticides in aqua farms and non-adherence to scientific management practices have resulted in adverse impact on aquacultural production, serious outbreaks of diseases, development of drug resistance in microbes, and accumulation of antibiotics and pesticide residues in finfish and shellfish and environmental pollution. As a result, a need has been felt by the aquaculturists as well as aquatic animal health management professionals to find a suitable alternative therapy in place of antibiotics and chemotherapy. Phytotherapy has come to be recognized as a handy and viable alternative to chemotherapy, as it is economical, effective, non-resistance forming, renewable, eco-friendly and farmer-friendly. Although the use of medicinal plants is known to humanity since the dawn of human civilization for the treatment and control of human and animal diseases but its importance in combating finfish and shellfish diseases has been realized only recently. The phytotherapy of aquacultural diseases is in its infancy in most part of the world except in China to some extent. However, many important contributions in this field by different workers during the last quarter of the 20th century and early 21st century have shown encouraging results and opened new vistas in phytotherapy of aquatic animals. The present review crtically evaluates the present status of knowledge of phytotherapy in the world combating various aquacultural diseases, identifying the bottlenecks and suggests remedial measures.
文摘The finfish and shellfish resources were assessed quantitatively and qualitatively in regard to their abundance in creek waters at three sites within a period of two years, from January 1999 to December 2000, in the western mangrove areas of Kachchh. The catch rate varied from 0.69 to 6.99 kg h-1. It was low during monsoon (July to October), which could be due to the freshwater-flow-induced salinity reduction in all the sites. Among 38 species recorded, 5 were shellfish and 33 were finfish. The spawning period of fishes was found to be during summer and early monsoon period (May to August). Surface water temperatures varied from 17 ℃ to 37 ℃. Salinity values varied from 34 to 44 and the pH ranged between 7 and 8.9. Variation in dissolved oxygen content was from 3.42 to 5.85 mL L-1. The high fishery densities in these semi arid mangrove creek areas were recorded during monsoon and early winter season.
