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Gupta, Rakesh Kumar
- Population Structure of Freshwater Crab P. Masoniana (Henderson) in the Lower Reaches of Chenab River, J&k State, India
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1 Department of Zoology, University of Jammu, Jammu
1 Department of Zoology, University of Jammu, Jammu
Source
International Journal of Fisheries and Aquaculture Sciences, Vol 3, No 1 (2013), Pagination: 1-6Abstract
The population structure of freshwater crab of Paratelphusa masoniana (Henderson) was studied in the lower reaches of river Chenab in J&K, India. Crabs were randomnly sampled on monthly basis from June 2010-May 2011, a total of 581 crabs were obtained of which 283 (48.37%) were males and 302 (51.62%) were females. The overall sex ratio was found to be 1:1.07 indicating that females were numerically more in compared to males. However sex ratio never remain constant but exhibited fluctuation pattern throughout year especially in the month of June-July and December- January when it was recorded to be almost less than unity (1:0.40, 1,1:0.6 and 1:0.55 respectively). The present population represents non normal size frequency distribution with male reaching greater size (5-6 cm cw) than females (4-5 cm cw).Keywords
Paratelphusa Masoniana (henderson), Population Structure, Sex Ratio
References
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- Identification of Different Types of Haemocytes in Freshwater Crab Paratelphusa Masoniana (Henderson)
Abstract Views :796 |
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Authors
Source
International Journal of Fisheries and Aquaculture Sciences, Vol 3, No 1 (2013), Pagination: 7-12Abstract
For the first time haematological studies on freshwater crab P. masoniana (Henderson) has been carried out in Jammu, India. The aim of studies were to determine various type of hemocytes, their total and differential count as well. Based on morphological studies of hemocytes under microscope three types of haemocytes were identified viz., Hyalinocytes (H), Semigranulocytes (SG) and Granulocytes (G). These cells were varied with respect to their proportion, Semigranulocytes being the heighest (54%) follow by Granulocytes (30%) while Hyalinocytes were least (16%) among three cells.Keywords
Paratelphusa, Haemocytes, Morphological FeaturesReferences
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