Fertilization of Earth Ponds. III: Effects on Benthic Macro Invertebrates and Ecological Inter-Relationship with Aquatic Macrophytes

Wade, J.W.; Stirling, Hadrian P.

doi:10.4314/jas.v14i1.19968

Cited by 1 publication

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“…They are also scavengers, feeding on any kind of decaying matter available in the habitat (Kungvankij and Chua, 1986). Relationship of primary producers and benthic invertebrates has been studied by Wade and Stirling (1999). Karlson (2010) reported that by feeding on organic matter from settled phytoplankton blooms benthic invertebrates produce food for higher trophic levels and remineralize nutrients that can fuel primary production.…”

Section: Introductionmentioning

confidence: 99%

Production potential of Tiger Shrimp, Penaeus monodon by fertilization and reducing feed supply

Saha

Ali

2015

Bangladesh J. Zool.

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Experiment was conducted to assess the potential of increasing production of shrimp, Penaeus monodon by enhancing primary production through fertilization and reduc feeding regime. Four treatments viz., T1, feeding @ 2% of shrimp biomass from 31~80 days of culture and then 1%; T2, feeding @ 3% of shrimp biomass from 31~80 days of culture and then 2%; T3, feeding @ 2% of shrimp biomass from 31~80 days of culture and then 1% + fertilization; T4, feeding @ 3% of shrimp biomass from 31~80 days of culture and then 2% + fertilization each with three replications were tested. Urea @1.25 ppm and TSP @ 1.50 ppm were applied as fertilizer monthly. After 120 days of culture, mean final weight of shrimp was 11.86±0.35g, 12.08±0.51g, 13.30±0.99g and 14.50±1.14g with the production of 458.36±14.86 kg/ha, 484.93±7.26kg/ha, 536.75±4.81 kg/ha and 592.19±35.05 kg/ha in T1, T2, T3 and T4, respectively. Reduction of feed reduce both growth and production of shrimp. Increase in primary productivity due to fertilization increase production of shrimp to a significant level (F=32.94; p<0.001). But overall production of shrimp was lower in comparison to other similar studies when higher feeding applied.

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Section: Introductionmentioning

confidence: 99%