Effect of salinity on ovarian development in sub-adults of Indian spiny lobster, Panulirus homarus (Linnaeus) * K. Vidya, Shoji Joseph and P. B. Ajithkumar Central Marine Fisheries Research Institute, Cochin-18, Kerala, India. Telephone : 0091-0484- 2394867/2394357 Fax : 0091-0484-2394909/2396685 E-mail: vidyakuttikrishnan@gmail.com Abstract
The study was carried out to investigate the salinity stress on ovarian development of Indian spiny lobster, Panulirus homarus. Three different treatments, low salinity 20 psu (LSD 100), normal salinity 30 psu (NSD 100) and high salinity 40 psu (HSD100) in triplicates …show more content…
Considerable Worldwide importance is given for Spiny lobster aquaculture because of its increasing market value and its limited natural population. Spiny lobsters are in great demand, particularly for the restaurants of such wealthy nations as the United States and Japan, which are major importers of lobsters and lobster products. Consequently, lobsters are high-value commodity and stocks of lobsters of all types including berried and under sized ones are exploited around the world. The high value and marketability of lobsters, together with their live-storage potential and the durability conferred by the hard exoskeleton, make them attractive for fishery development in tropical nations (Prescott, 1988). Fishery of berried lobsters and juveniles are banned in many countries aiming the conservation of lobsters. However, adult lobsters including berried ones and even juvenile lobsters caught in the fishery are used by the fishers as lobster prices are very high in the market. This will lead to the low recruitment and reduction of the population size. The lack of protection of spawners could damage reproductive potential, resulting in recruitment failure. In fact, the average size of the lobster population has been seen decreasing over the last decade. Recently the capture based aquaculture (CBA) of lobsters is developing in many places including India using the undersized juveniles from the fishery and fattening in cages installed in the coastal seas. This will lead to increased production by fattening the smaller ones and allow them to reach the first maturity and spawning in natural environment itself finally aiming to
The study was carried out to investigate the salinity stress on ovarian development of Indian spiny lobster, Panulirus homarus. Three different treatments, low salinity 20 psu (LSD 100), normal salinity 30 psu (NSD 100) and high salinity 40 psu (HSD100) in triplicates …show more content…
Considerable Worldwide importance is given for Spiny lobster aquaculture because of its increasing market value and its limited natural population. Spiny lobsters are in great demand, particularly for the restaurants of such wealthy nations as the United States and Japan, which are major importers of lobsters and lobster products. Consequently, lobsters are high-value commodity and stocks of lobsters of all types including berried and under sized ones are exploited around the world. The high value and marketability of lobsters, together with their live-storage potential and the durability conferred by the hard exoskeleton, make them attractive for fishery development in tropical nations (Prescott, 1988). Fishery of berried lobsters and juveniles are banned in many countries aiming the conservation of lobsters. However, adult lobsters including berried ones and even juvenile lobsters caught in the fishery are used by the fishers as lobster prices are very high in the market. This will lead to the low recruitment and reduction of the population size. The lack of protection of spawners could damage reproductive potential, resulting in recruitment failure. In fact, the average size of the lobster population has been seen decreasing over the last decade. Recently the capture based aquaculture (CBA) of lobsters is developing in many places including India using the undersized juveniles from the fishery and fattening in cages installed in the coastal seas. This will lead to increased production by fattening the smaller ones and allow them to reach the first maturity and spawning in natural environment itself finally aiming to