1Social Environmental and Biological Association, India
2Zoological Survey of India, India
Submission: February 09, 2017; Published: February 13, 2017
*Corresponding author: Nandi NC, Social Environmental and Biological Association, Kolkata, India, Tel: 9674002604; Email: firstname.lastname@example.org
How to cite this article: Dev R M, Rath S, Nandi N. Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) Whistle Sound by Denoising Spectra with Discrete Wavelet Transform (DWT). Ocean & fish Open Access J. 2017; 1(3): 555562. DOI: 10.19080/OFOAJ.2017.01.555562
Portunid crabs belonging to the genera, viz., Scylla, Portunus and Charybdis species mostly represent edible shellfishes with high quality meat content. These crabs are widely valued in domestic and export markets Nandi & Pramanik . They are mostly marine species; estuarine forms are also not uncommon. In the eastern maritime States of India, Odisha coast is 480 km long with a continental shelf area of 32,000 sq km. In this coastal region there are a number of estuaries (Mahanadi, Rhushikulya, Bahuda, Brahmani-Baitarini) and a large brackish water lagoon, known as Chilka Lake, an important Ramsar site in India. All these coastal habitats support important fish and shell fish resources of the country. A perusal of literature as well as investigation undertaken by the authors reveals a total of 29 portunid crabs species belonging to three subfamilies and six genera (Table 1) from this coast including five new records, (Table 2, Figure 1) viz., Portunus (Xiphonectes) hastatoides (Fabricius), Charybdis (Charybdis) lucifera (Fabricius), Charybdis (Charybdis) variegata (Fabricius) and Charybdis (Goniohellenus) truncata (Fabricius). It is mentioned that literature studies have revealed that in India, Andaman and Nicobar Islands support maximum number of 55 portunid species Dev Roy & Nandi , followed by 53 species from Tamil Nadu coast Dev Roy & Nandi  23 species from West Bengal coast Dev Roy & Nandi  and 22 species from Andhra Pradesh coast Dev Roy & Nandi . Among the species listed, Scylla serrata, S. olivacea, S. tranquebarica, Portunus pelagicus and P. sanguinolentus are highly exploited from this coast. Thus, it is necessary to encourage culture of crabs, especially mud crab fattening and farming segregating mud crab species towards cost effective production of crabs Nandi, et al. , Pramanik & Nandi  and to meet the local demand as well as export market.