International Journal of  Applied Bioresearch (IJAB)

ISSN 2250 - 2033 (Print); e -ISSN: 2250 - 2041 (Online)

Conservation and management of rare fern allies of Huperzia phlegmaria (L.) Rothm
M. Maridass and G.Raju

Abtract

Above 3.4% of the predicted total number of species on Earth is plants. Now, estimated that between 22 and 47% of the world’s flora is in serious decline. Over 8,000 plant species worldwide are threatened with extinction, according to the World Conservation Union, and that number grows daily. Plants and their communities are an indispensable part of the Earth's biosphere as plants not only affect ecosystem functioning, but also provide essential ecosystem services for the benefit of human being. Many factors are contributing to the loss of plant species, and these threats act synergistically. Foremost among the causes of extinction is conversion or destruction of habitats by humans. Over harvesting of wild plants species are used for food and medicine. These plant species were going to endangers categories. Reintroduction or creation of new populations of plants are another conservation tool that follows on seed banking, but this practice carries its own challenges. Many reintroduction efforts fail because the species’ ecology is poorly understood or because their original habitat has been irrevocably damaged. It is risky to existing populations to remove and deplete their seeds in favor of establishing new populations. It is not enough to scatter seeds in apparently appropriate habitat and hope for the best. Seedlings are monitored closely for survival and reproduction, and reasons for plant mortality must be carefully observed.

Social Spiders (Araneae: Eresidae: Stegodyphus) in Tamil Nadu, India
 
John T. D. Caleb, R. Karthikeyani & K. Muthuchelian

Abstract

Social spiders of the genus Stegodyphus Simon have been studied from the scrub regions of Madras Christian College campus (MCC), Chennai, Kumbakarai falls, Periyakulam, Theni district and Nilgiris in Tamil Nadu. Three species, Stegodyphus pacificus Pocock, 1900, Stegodyphus sarasinorum Karsch, 1892 and Stegodyphus tibialis (O. Pickard-Cambridge, 1869) have been found. Stegodyphus sarasinorum and Stegodyphus tibialis have been described and illustrated.

 
Keywords: Social spiders, Stegodyphus, Taxonomy,       Tamil Nadu, India

 

Low cost probiotic dietary supplement for growth enhancement in shrimp Penaeus monodon (Fab.)
 
 M. Navin Chandran, S. Moovendhan, A.M. Suganya, G. Immanuel & A. Palavesam

Abstract

 
In the present study an attempt has been made to assess the efficiency of low cost probiotic powder on growth response of shrimp Penaeus monodon. For this, 45 days laboratory rearing experiment was performed in 100l capacity glass tanks stocked with P. monodon 15 Nos/ tank. During experimental period, feeds supplemented with low cost probiotic product at 0, 1, 2, 3, 4 and 5% (D1-D5) concentrations were fed to shrimp at the rate of three times per day. The results indicated that the shrimp fed with D4 diet (4%) showed the better production of 4.01 ± 0.031g, SGR of 1.339 ± 0.023% and FCR of 1.67 ± 0.041 when compared to control diet fed groups.  The tested biochemical constituents in the muscle tissue also showed variations among P. monodon fed on control and experimental diets. A higher protein content of 10.14 ± 0.136mg/100mg wet tissue was noticed in D4 diet fed P. monodon compared to control diet fed shrimps. A similar trend was also noticed for carbohydrate and lipid contents. In conclusion, it evident that the low cost probiotic product at a concentration of 4% in improved the growth performance of P. monodon.
 
Keywords: Low cost probiotic product, SGR, FCR, Biochemical constituents.
 

Volume  No. 27;                                                                   March 2016

Table  and Contents

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