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Haldar, P.
- Effect of Papain on Unusual Behaviour of Fishes and Prawns
Abstract Views :376 |
PDF Views:4
Authors
Affiliations
1 Department of Zoology, Visva Bharati University, Santiniketan-731 235, West Bengal, IN
1 Department of Zoology, Visva Bharati University, Santiniketan-731 235, West Bengal, IN
Source
Journal of Environment and Sociobiology, Vol 12, No Sp Iss (2015), Pagination: 3-4Abstract
This paper deals with an unusual behaviour of some fshes, prawns and shrimps reared in a nano pond of 26' × 18' size, located in the homestead area at Santiniketan, Birbhum district, West Bengal. Water source of this mini-size pond was rain water and also from deep tube-well or well water during dry seasons. After rain fall water of this pond becomes turbid due to erosion of soil from the bank. Once a papaya plant of 6 months of age, having girth of 3" at base and 2" at the top and a length of 4' was cut into three pieces and was put in water of the pond during a sunny day at about 9 AM in the month of July 2012 to clear the turbidity of water. After 24 hrs, it was found that the water became clean and transparent. After 48 hrs at about 8 AM, the crustacean species, mainly the galda prawns were found to try to keep their head portion above the water at the edge of the pond, while most of the small shrimp species came near the bank and died after 3-4 hours. By this time the carp varieties of fishes appeared sluggish in nature whereas the Tilapia and the Nilentika showed normal behaviour. Thus, it seems that the papaya plant and/or its latex, containing papain can be utilized in limited doses to catch the prawn and shrimp species in an eco-friendly way, minimising the cost of catching without detriment to the health of shrimp-eaters.- Biomass Production of Acridids as Possible Animal Feed Supplement
Abstract Views :234 |
PDF Views:1
Authors
Affiliations
1 Department of Zoology, Visva-Bharati University, Santiniketan-731235, West Bengal, IN
1 Department of Zoology, Visva-Bharati University, Santiniketan-731235, West Bengal, IN
Source
Journal of Environment and Sociobiology, Vol 5, No 2 (2008), Pagination: 181-190Abstract
Experiments were done to estimate biomass production by mass rearing of Oxya fuscovittata (Marschall) and Spathosternum prasiniferum prasiniferum (Walker) under laboratory condition, in order to utilize them as non conventional protein rich animal feed supplement. For this purpose fecundity, fertility, adult emergence, sex-ratio, fresh and dry body weight, protein and energy content in acridid tissue were determined. This study has shown that taking a single pair of male and female as starting point, O. fuscovittata may produce 225.07 kg dry biomass/year by mass rearing. Thus O. fuscovittata with high protein content and ability to produce high biomass can be utilized in animal feed as protein supplement through establishment of acridid farms.Keywords
Oxya fuscovittata, Fecundity, Energy Content, Protein Content, Acridid Farming.- Life Span and Sex Ratio in Multivoltine and Univoltine Species of Acridids
Abstract Views :234 |
PDF Views:0
Authors
P. Haldar
1,
Hena Anand
1
Affiliations
1 Department of Zoology, Visva-Bharati University, Santiniicetan-731 235, IN
1 Department of Zoology, Visva-Bharati University, Santiniicetan-731 235, IN
Source
Journal of Environment and Sociobiology, Vol 1, No 1-2 (2004), Pagination: 61-65Abstract
The knowledge of the life span and sex ratio is of immense importance for biomass production of acridids which can be utilized as non-conventional nutrient source in animal feed. Life span and sex ratio were studied on four Indian acridid species, i.e., Oxya fuscovittata, Acrida exaltata, Hieroglyphus banian and Spathosternum prasiniferum prasiniferum under laboratory based rearing. The study reveals that H. banian required more rearing time than A. exaltaia, 0. fuscovittata and S. pr. prasiniferum. In each species females were found to live longer than the males. The sex ratio study shows female dominance in O. fuscovittata and A. exaltata and male dominance in H. banian and S. pr. prasiniferum under laboratory condition.Keywords
Acridid, Life Span, Sex Ratio, Biomass, Rearing.- Effect of Heavy Metals on Population Dynamics of an Acridid, Oedaleus abruptus
Abstract Views :245 |
PDF Views:0
Authors
Susanta Nath
1,
P. Haldar
2
Affiliations
1 Department of Zoology, Darjeeling Govt. College, Darjeeling-734 101, IN
2 Department of Zoology, Visva Bharati University, Santiniketan-731235, IN
1 Department of Zoology, Darjeeling Govt. College, Darjeeling-734 101, IN
2 Department of Zoology, Visva Bharati University, Santiniketan-731235, IN
Source
Journal of Environment and Sociobiology, Vol 2, No 1-2 (2005), Pagination: 67-70Abstract
The present communication deals with the effect of heavy metals pollution on the population fluctuation of an acridid, Oedaleus abrnptus. The amount of lead, cadmium and copper crossed the recommended limit and tolerance limit in the industrial area. The study showed that toxic metal pollution has a significant role in population fluctuation of Oedaleiis abruptiisKeywords
Acridid, Pollution, Metal.- Seasonal Occurrence and Sex Ratio in Acridids (Acrididae:Orthoptera) in the Dry Deciduous Forest of West Bengal, India
Abstract Views :224 |
PDF Views:0
Authors
Affiliations
1 Department of Zoology, Visva-Bharati University, Santiniketan- 731235, West Bengal, IN
1 Department of Zoology, Visva-Bharati University, Santiniketan- 731235, West Bengal, IN