57 research outputs found
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
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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 тА░ 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┬░ NтАУ83.3┬░ 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 тАЬGollaluтАЭ 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
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