Salinity preference of two diatoms and their growth performance in three prepared and two alternative on-farm media sources

Salinity and preferred nutrient composition of <i>Chaetoceros affinis</i> and <i>Skeletonema costatum</i> were tested. Salinity was tested at 12, 16, 23, 28, and 32 ppt. Three compositions of nitrogen (N), phosphorus (P), and potassium (K) and two on-farm low-cost alternative media sources, cow urine (CU) and hatchery waste water (HWW), were tested to find the suitable NPK ratio and to determine the efficacy of the on-farm media respectively.

Reviving the Macrobrachium rosenbergii (de Man) fishery in Vembanad Lake, India

In Vembanad Lake and its confluent rivers (Kerala, India), the catches of Macrobrachium rosenbergii (de Man) were reported to have dwindled to a mere 39 t in the 1980s from average landings of 300 t during the 1960s. This decline is due to the impact of a number of human interventions affecting the ecosystem and, hence, the stocks of M. rosenbergii. Monitoring of landings in 1994-1995 and 1995-1996 indicates an improvement in catches. This paper discusses the reasons for the decline and revival in stocks and suggestions for their replenishment.

Report on involvement of women in shrimp technology development: shrimp quality support project 2, implemented by WorldFish Center

This report focused on the scope and promotion of women participation in shrimp value chain and find out the factors of gender equity and enhancement of women empowerment along with the value chain of the shrimp industry.

Report on gender training with gender module: shrimp quality support project 2, implemented by WorldFish Center, support by USAID

Earlier studies and works done in the first phase of the shrimp quality support project revealed that gender discrimination is widespread in the value chain of shrimp sub-sector. As such the SQSP 2 has the objective to provide training on gender development to the different stakeholders of the shrimp value chain to aware and sensitize them to employ more women to achieve gender equality and mainstream gender in the sub-sector.

A method to estimate the stock-recruitment relationship of shrimps.

A procedure is proposed by which recruit numbers and parental biomass of shrimps stocks can be derived, given a series of catch-per-effort data and estimates of a few ancillary variables. In the Gulf of Thailand, shrimp recruitment decreased with decreasing egg production, but increased with decreasing total (mainly fish) standing stock. The net result of these counteracting effects was an overall increase in shrimp recruitment, attributable to a greatly reduced prerecruit mortality.

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