scholarly journals Abundance and Diversity of Zooplankton in Semi-Intensive Shrimp (Penaeus monodon) Farm

2012 ◽  
Vol 5 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Alokesh Kumar Ghosh ◽  
Suman Kumar Saha ◽  
Md Rashedul Islam ◽  
SM Bazlur
Keyword(s):  
Management Strategies ◽  
Penaeus Monodon ◽  
Life Sciences ◽  
Seasonal Abundance ◽  
Zooplankton Abundance ◽  
Shrimp Culture ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Abundance And Diversity ◽  
Two Peaks

The present study was carried out on the seasonal abundance and diversity of zooplankton in a semi- intensive shrimp farm of Bagerhat district from June to December, 2008. Plankton samples were collected by conical shaped monofilament nylon net (Plankton net) and Lugol’s solution was used for preservation. The zooplankton abundance was influenced by physico-chemical factors. In the present study 5 groups of zooplankton were observed namely rotifer, copepod, cladocera, ostracoda and crustacean larvae. Among the various groups of zooplankton, the percentages of copepod, rotifer, cladocera, ostracoda and crustacean larvae in the culture system were 52%, 39%, 7%, 1% and 1% respectively. The zooplankton was dominated by copepods (52%) which showed more or less two peaks in August (833 individuals/L) and in October (815 individuals/L). Rotifer and copepod were about r awhile one genus Cypris of ostracod was found only in August. Three genus of copepod namely Diaptomus,  Cyclops and Mesocyclops were identified in the study area of which Diaptomus and Mesocyclops were more or less dominant while four genus of which Brachionus and Filinia under rotifer and Daphnia and Diaphanosoma under cladocera were also found during the study period. The findings of the present study will help to improve the management strategies of shrimp culture system.DOI: http://dx.doi.org/10.3126/ijls.v5i1.5286 International Journal of Life Sciences Vol.5(1) 2011 1-11

scholarly journals Seasonal abundance of zooplankton and growth performance of prawn and fish in ponds of Rajshahi

1970 ◽  
Vol 29 ◽  
pp. 9-15 ◽  
Author(s):  
MAB Siddique ◽  
M Afzal Hussain ◽  
MA Hossain ◽  
M Manjurul Alam
Keyword(s):  
Growth Performance ◽  
Stocking Density ◽  
Total Alkalinity ◽  
Seasonal Abundance ◽  
Zooplankton Abundance ◽  
Mean Values ◽  
Physico Chemical ◽  
The Mean ◽  
The Village ◽  
Total Average

The present study was conducted on seasonal abundance of phytoplankton of prawn based carp polyculture system fishponds for a period of six months from September 2006 to February in the village Meherchandi of Boalia thana under Rajshahi district of Bangladesh. During the study period, it was found that water temperature varied from 16.59°C (T2) to 29.82 (T1), transparency 26.72 (T1) to 40.13cm (T2), pH 7.21 (T1) to 8.0 (T2) DO 2.13 (T2) to 3.6mg/l (T2), CO2 4.63 (T1) to 10.63mg/l (T2), NH3N 0.001 (T1) to 0.0197mg/l (T2) and total alkalinity fluctuated from 85.38 (T1) to 147.75mgl (T2). A total four groups of zooplankton were identified where 5 rotifera (38.41%) was dominant followed by 3 cladocera (31.49%), 2 copepoda (21.84%) and crustacean larvae (8.26%). It was also found that zooplankton showed abundance in February. The highest total average zooplankton (18390.79±2144.63 cells/l) was recorded in T1 than T2 which might be due to the effective uses by high stocking density of fishes. Zooplankton showed positive correlation with pH, DO, CO2 and alkalinity in T1. In case of T2, positive co-relationship was found with pH, DO, CO2 and NH3-N. The mean values of highest final weight of M. rosenbergii, H. molitrix and C. catla were 89.20±8.62g (T1), 682.70±44.20g (T2) and 428.00±4.50g (T1) respectively, highest survival rate was found 76.25±6.25% (T1) of prawn and highest total average yield was obtained 940.65±259.43 kg/ha in T2 due to high stocking densities of prawn. Key words: Zooplankton abundance; physico-chemical parameters; carp polyculture; growth performance DOI: http://dx.doi.org/10.3329/ujzru.v29i1.9459 UJZRU 2010; 29(1): 9-15

scholarly journals Study on the occurrence and abundance of noxious Microcystis spp. in pangasiid catfish (Pangasianodon hypophthalmus) ponds

2020 ◽  
Vol 9 (1) ◽  
pp. 1-8
Author(s):  
Saleha Khan
Keyword(s):  
Feeding Rate ◽  
Algal Bloom ◽  
Silver Carp ◽  
Seasonal Abundance ◽  
Hypophthalmichthys Molitrix ◽  
Blue Green Algae ◽  
Pangasianodon Hypophthalmus ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Peak Abundance

As microalgal blooms are very common and making serious problems in water bodies throughout Bangladesh, an investigation was carried out to see the composition and succession of noxious blue-green algae in pangasiid catfish (Pangasianodon hypophthalmus) ponds. During the course of the study, 20 species of Cyanophyceae were recorded, and among them Microcystis aeruginosa was the most abundant compared to other species. Significant occurrence of Microcystis viridis was also observed. Efforts were made to study certain physico-chemical factors and their influence on the composition and seasonal abundance of these species. Peak abundance of M. aeruginosa was observed from July to August. Moderately higher water temperature, lower rainfall and NO3-PO4 enrichment increased the biomass of both M. aeruginosa (168.72×103cells/L) and M. viridis (8×103cells/L) in the experimental ponds. Higher feeding rate in monoculture of pangasiid catfish (P. hypophthalmus) made the ponds hyper nutrified by unutilized feed and fish excreta that supported the higher abundance of these Cyanophyceae. In composite culture ponds, silver carp (Hypophthalmichthys molitrix) effectively grazed down the microalgae and as a result, algal bloom was not noticed.

scholarly journals Influence of Physico-Chemical Factors, Zooplankton Species Biodiversity and Seasonal Abundance in Anzali International Wetland, Iran

2017 ◽  
Vol 07 (01) ◽  
pp. 91-99 ◽  
Author(s):  
Delaram Golmarvi ◽  
Maryam Fallahi Kapourchali ◽  
Ali Mashinchian Moradi ◽  
Mohammadreza Fatemi ◽  
Rezvan Mousavi Nadoshan
Keyword(s):  
Seasonal Abundance ◽  
Zooplankton Species ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Anzali International Wetland ◽  
Species Biodiversity

Ecology and diversity of zooplankton in relation to physico-chemical characteristics of water of Santragachi Jheel, West Bengal, India

2011 ◽  
Vol 5 ◽  
pp. 20-39 ◽  
Author(s):  
Ashis Patra ◽  
Kalyan Brata Santra ◽  
Chanchal Kumar Manna
Keyword(s):  
Population Density ◽  
Oxygen Demand ◽  
Zooplankton Community ◽  
Total Suspended Solid ◽  
Seasonal Abundance ◽  
Polluted Water ◽  
Zooplankton Abundance ◽  
Dominant Group ◽  
Positive Correlation ◽  
Physico Chemical

In the present study efforts have been made to ascertain the seasonal abundance and population dynamics of zooplankton community and its relationship with physico-chemical factors of the water bodies of Santragachi Jheel in the District Howrah, W.B., INDIA. The zooplankton abundance showed distinct seasonal or temporal variation in the Jheels. A total of 18 species belonging to 12 families and 15 genera were recorded. The population density of total zooplankton showed summer maxima in the Jheel. Maximum abundance of rotifer fauna was recorded during summer season in sewage sites whereas Cladocera population showed maximum density at non-sewage sites. Copepods showed postmonsoon maxima in sewage sites in the Jheels. Some species i.e., Polyarthara vulgaris were quite abundant in the polluted water of the Santragachi Jheel. Out of 15 genera of Zooplankton, Brachionus, Keratella, Polyarthra, Diaphanosoma, Ceriodaphnia, Bosmina, Heliodiaptomus and Mesocyclops were found to be dominant in Santragachi Jheel. Highest percentage of similarity was recorded between S1 and S3 sites of the Jheel. Results of ANOVA (2 - way) indicated that zooplankton population differs significantly in relation to stations and seasons of the Jheel. Population of Rotifera, the most dominant group was found to be positively influenced by Biological Oxygen demand (BOD), Free Carbon-di-oxide FCO2), CaCO3 hardness (CaHa), Total suspended solid (TSS), Chloride(Cl) and Phosphate (PO4) in the Jheels. Total Cladocera showed positive correlation with PO4 in the Jheel. The Copepods expressed positive correlation with BOD and ammonia. Increment of population density of several zooplankton organisms (i.e., Keratella tropica, Polyarthra vulgaris) and low value of community indices especially species diversity and species richness indicated the rise of pollutional stress on the Santragachi Jheel. Keywords: Zooplankton; Rotifera; BOD; COD; Shannon - Wiener index; Evenness index DOI: http://dx.doi.org/10.3126/jowe.v5i0.4595 J Wet Eco 2011 (5): 20-39

scholarly journals Diurnal vertical migration of some cladocerans in relation to the physico-chemical factors in a fish pond

1970 ◽  
Vol 20 (2) ◽  
pp. 147-154 ◽  
Author(s):  
AS Bhuiyan ◽  
S Akhter ◽  
MMA Quddus
Keyword(s):  
Key Words ◽  
Vertical Migration ◽  
Fish Pond ◽  
Chemical Parameters ◽  
Surface Layers ◽  
Diurnal Vertical Migration ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Diurnal Movement ◽  
The Relationship

Diurnal vertical migration of four genera of cladocerans, namely Diaphanosoma sp., Daphnia sp., Moina sp. and Bosmina sp., during March to December, 2007 showed that the number of Diaphanosoma sp. was 501 units/1 in the surface layers, 172 units/l in the middle layers and 190 units/l in the bottom layers. The yearly number of Daphnia sp. in surface, middle and bottom layerss was 362 units/l, 46 units/l and 189 units/l respectively. In surface, bottom and middle layers, the number of Moina sp. was 159, 71 and 32 units/l, respectively. Bosmina sp. was 78 units/l in surface, 31 units/l in the middle and 33 units/l in the bottom layers. The number of Diaphanosoma sp., Daphnia sp., Moina sp., Bosmina sp., were 455, 149, 259 and 358 units/l, respectively in the morning, 63, 176, 142, 43 units/l at noon and 107, 55, 28, 59 units/l, respectively in the evening. Throughout the study period the cladocerans were always abundant near the surface during morning and evening. Among the factors responsible for the diurnal movement of cadoceran, light played the most important factor. The relationship between the physico-chemical factors and the cladoceran occurrence in the pond was also explored. Key words: Cladocera; Diurnal migration; Physico-chemical parameters; Fish pond DOI: http://dx.doi.org/10.3329/dujbs.v20i2.8975 DUJBS 2011; 20(2): 147-154

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