Record of the sea slug, Kalinga ornata Alder & Hancock, 1864 from the inshore waters of Bay of Bengal along Chennai coast

Sea slugs were caught in the trawl net operated off north Chennai at a depth of around 100-150 m during early hours of 24 June 2011. The specimens were classified and identified as Kalinga ornata and deposited in the Marine Biodiversity Museum of the Central Marine Fisheries Research Institute, Kochi (Accession code: DB. 40.1.1.). Although sea slugs have been found in these waters, there are limited studies on identification to the species level. Kalinga ornata was reported in India during 1936 from Kolkata and further there are no published reports on occurrence of of this species along the east coast of India

Economics and policies for open sea cage culture in Andhra Pradesh

The fisheries sector plays a significant role in providing employment, reducing poverty and promoting health. Fish is an extremely nutritious, a vital source of protein and essential nutrients. The sector provides employment opportunities to nearly 14.5 lakh people directly and indirectly in Andhra Pradesh. In recent years, sea farming is gaining popularity and a couple of finfish, shellfish species and some sea weeds are now being farmed. Ornamental fish farming also has a promising future and is likely to contribute to the overall growth of fisheries sector in the coming years. Good governance and good culture practices can enable fisheries to thrive sustainably. Therefore, the Government of Andhra Pradesh is unveiling the policy to create a suitable eco-system for the rapid growth of fisheries and aquaculture for the coming years

आँध्रप्रदेश की शीर्षपाद मात्स्यिकी

आँध्रप्रदेश की शीर्षपाद मात्स्यिक

Market structure analysis of fish markets in North coastal districts of Andhra Pradesh

Andhra Pradesh is one of the predominant fish producing states in the country which stood first in total fish and shrimp production in India for the year 2015-16. The fisheries sector contributes 6.01 % of the states Gross State Domestic Product (GSDP) and provides meaningful employment opportunities to nearly 14.5 lakh people directly and indirectly in the secondary and tertiary sector

Utilization of cuttlebone by aquafarmers at Visakhapatnam

Cephalopods represent an important group of molluscs and form an important component of the exploited marine fishery resources of the state. Cephalopods include squids, cuttlefishes and octopuses

Occurrence of Mirabilistrombus listeri off Visakhapatnam coast

Live specimens and shells of Mirabilistrombus listeri (Gray, 1852) were collected from the by-catch of the shrimp trawlers operating off Visakhapatnam (17° 42' N, 83° 15' E) in the Bay of Bengal. The live specimens were maintained in the marine hatchery in 1 tonne capacity fiberglass tanks containing seawater of 32-35 ‰ salinity. The morphometric measurements and the behavior of the conch was recorded. The identification of the species was based on earlier description by Abbott (1960) and Subba Rao (2003)

Wild black-lip pearl oyster, Pinctada margaritifera spat: growth and broodstock development

The black lip pearl oyster, Pinctada margaritifera (Linnaeus,1758) is a marine oyster distributed in the South Pacific, Indo-Pacific regions and the Red Sea. Globally, it is one of the three valuable pearl producing oysters in the pearl culture industry, apart from Pinctada fucata and Pinctada maxima. However, in India, the distribution of P. margaritifera is limited to Andamans and Nicobar Islands and occurring very rarely in Gulf of Mannar. (Alagarswami, 1983). Spat of Pinctada margaritifera was collected from the intertidal rocks off the coast of Visakhapatnam 17.7° N–83.3° E, Andhra Pradesh (Bay of Bengal) during low tides. The spat was light green in colour with alternate white and green radial pattern with distinct growth processes. They were acclimatized and reared in 1 t fiberglass tanks in the marine hatchery

Growth and biometric relationships of the silver or gold-lip pearl oyster, Pinctada maxima (Jameson, 1901) under land-based culture system

The spat of silver or gold-lip pearl oyster, Pinctada maxima (Jameson, 1901), collected from the hulls of mechanized fishing trawlers operating from Visakhapatnam were grown under land-based culture system. The pearl oysters were continuously fed with a mixed diet of micro-algae through a specially designed drip system. The growth in terms of dorsoventral measurement (DVM), weight and thickness as well as the biometric relationships are presented. A maximum DVM of 141 mm and a maximum weight of 292 g were obtained in two years. The land-based culture technology originally developed and patented in India for Pinctada fucata, is also discussed with respect to suitability for culture of P. maxima

Comparative regeneration of excised mantle tissue in one year and seven year old Indian pearl oyster, Pinctada fucata (Gould) grown under land-based culture system

Excised mantle tissue (saibo) from the donor oyster is one of the important factors determining quality of cultured pearls. The present study was conducted to compare the process of regeneration of excised mantle tissue in one year and seven year old donor oysters, Pinctada fucata grown under land-based culture system. Menthol was used as relaxant prior to excision of mantle tissue, which was found to be effective at a concentration of 500 mg l-1. The mantle tissue was found to regenerate within 3 months post-excision in both one year as well as seven year old P. fucata, with 100% survival. On gross examination, the regenerated mantle tissue of the 1 year as well as the 7 year old oysters appeared similar to that of the normal mantle tissue of the control group. Histological analysis demonstrated complete regeneration of the mantle tissue and its associated structures in both the groups. This is the first description of in vivo mantle regeneration in 7 year old pearl oyster, P. fucata. The findings revealed that even aged donor oysters yielding good quality saibo can be recovered after mantle excision and could be further used as saibo donors for quality pearl production

Bivalve fisheries in Andhra Pradesh

In India states like Kerala and Karnataka have a flourishing bivalve fishery driven by demand for bivalve meat. However, in states like Andhra Pradesh and Tamil Nadu bivalve meat consumption is very negligible and demand is driven by the lime and shell craft industries only. Bivalves are locally known as “Gollalu” in Andhra coast with major species recorded being Crassostrea madrasensis, Saccostrea cucculata, M. meretrix, Meretrix casta, Marcia opima, Paphia malabarica, Tegillarca granosa, T. rhombea and Perna viridis. Mainly distributed along the shallow regions of Gostani estuary and Godavari estuary. In the Gostani estuary, the bivalve fishing grounds are Konadu, Moolaguddu, Nagamayyapalem, Thottepalem, Chinnanagarama, Asipalem, and Gudivada