Author/Authors :
Shakir، C. نويسنده Department of Microbiology, Bharathidasan University, Tiruchirappalli 620 024, India , , Manilal، A. نويسنده Department of Microbiology, Bharathidasan University, Tiruchirappalli 620 024, India , , Lal ، D. نويسنده Matsyafed Prawn Hatchery and Research Center, Thirumullavaram, Kollam 691001, India. , , Sujith، S. نويسنده Department of Microbiology, Bharathidasan University, Tiruchirappalli 620 024, India , , Selvin، J. نويسنده Department of Microbiology, Bharathidasan University, Tiruchirappalli 620 024, India ,
Abstract :
A survey on 58 shrimp farms (42 operational and 16 non-operational) was conducted within the Manroe island over 12 weeks. The black tiger shrimp, Penaeus monodon was the main species cultured. Presently, small-scale farmers carry out 90% shrimp aquaculture in Manroe Island. The farming is characterized by modified extensive and semi-intensive production systems, largely dependent on small ponds of less than 1 ha. These farms account for ~90% of the total area utilized for shrimp culture. The stocking densities range between 4 to 6 post larvae /m2 and average shrimp yields after 90-120 days is 320-400 kg.ha-1. As per our survey the average production cost for shrimp per hectare is at least 1,50,000 per cycle. During the 1990s, shrimp was cash crop in the Kollam with an average production of 900 kg.ha-1. Currently, the unsustainable practices and devastating outbreaks of disease has forced the industry to shut down.
