Meiobenthic fauna of the traditional prawn culture systems around Cochin

Preetha, K and Pillai, N G K (2000) Meiobenthic fauna of the traditional prawn culture systems around Cochin. Journal of the Marine Biological Association of India, 42 (1 & 2). pp. 39-46.

[img]
Preview
PDF
3397Kb

Abstract

The distribution and abundance of meiobenthos, hydrography and sediment characteristics of three different types of traiditonal prawn culture systems around Cochin were studied for a period of two years (1988-1990). Nematodes were the most dominant group (79.6%) of the total meiofaunal count followed by harpacticoids and polychaetes. Others like oligochaetes, bivalves, ostracods, amphipods and tanaids had only stray occurrences and together formed a meagre 0.30% of the total. The upper 0-5 cm layer harboured 79.5% of the meiofaunal population. The perennial ponds had the highest abundance of meiobenthos (69.9%) followed by canals (17.9%) and seasonal fields (12.2%): The meiobenthic biomass ranged from 0.84 mg/ 10 cm2 to 5.7 mg/lO cm2in different stations. Meiofauna did not show a significant positive correlation with the different environmental parameters. However, during the southwest monsoon period, the population showed a sharp decline. Meiobenthos were found to be abundant at stations where the sand content varied from 60-7870 and silt from 15-29%, and were lowest at stations with high clay content. High content organic carbon also did not favour a high abundance of meiofauna. The presence of nematodes(80%) in the gut content of the prawns indicates a trophic chain involving meibenthos.

Item Type:Article
Uncontrolled Keywords:Meiobenthic fauna; prawn culture; Cochin; Kerala
Subjects:Aquaculture > Mariculture
Aquaculture
Crustacean Fisheries > Prawn and Prawn fisheries
Divisions:CMFRI-Cochin > Marine Capture > Crustacean Fisheries
ID Code:1955
Deposited By:Geetha P Mrs
Deposited On:17 Aug 2010 00:26
Last Modified:17 Aug 2010 00:26

Repository Staff Only: item control page