64 research outputs found
Observation of extensive bed of giant mangrove whelk in Minicoy, Lakshadweep
Terebralia palustris (Linnaeus, 1767) is a species
of Caenogastropod belonging to the family
Potamididae, distributed widely in Indo-Pacific
region and African coast. An extensive bed of T.
palustris approximately 500 m long and 70 m wide,
appearing like a canal stretching into the beach was
observed along the south west coast of Minicoy
Island, Lakshadweep
Genetic structure of populations of Mugil cephalus using RAPD markers
Genetic structure of four populations of Mugil cephalus from Gujarat, Maharashtra, Andhra Pradesh and Tamil Nadu in India was studied using randomly amplified polymorphic DNA (RAPD) markers. Five selective primers provided distinct and consistent RAPD profiles in all the four populations. The bands in the range 400 to 1200 bp were scored for consistent results. The RAPD profiles generated by all the five primers revealed varying degrees of polymorphism, ranging from 50.76 (primer E03) to 72.41% (primer E05). NeiтАЩs genetic diversity (h) among the four populations varied from 0.3717 ┬▒ 0.1460 (Gujarat population) to 0.5316 ┬▒ 0.1720 (Maharashtra population). NieтАЩs highest genetic distance (0.8556) was observed between Tamil Nadu and Gujarat populations.Key words: Mugil cephalus, randomly amplified polymorphic DNA (RAPD), genetic structure, India
5th International Symposium on Cage Aquaculture in Asia Book of Abstracts
The 5th International Symposium on Cage Aquaculture in Asia (CAA5) is being organised by the Asian Fisheries Society and the ICAR-Central Marine Fisheries Research Institute (CMFRI), in association with the Asian Fisheries Society Indian Branch, from the 25th to 28th of November 2015 at Kochi, India. The event will cover an array of topics related to cage culture under the broad headings of Marine Production Systems, Inland Production Systems, Breeding and Seed Production, Nutrition and Feed, Health and Environment Management and Economics, Livelihood and Policies
5th International Symposium on Cage Aquaculture in Asia Programme Guide
The 5th International Symposium on Cage Aquaculture in Asia (CAA5) is being organised by the Asian Fisheries Society and the ICAR-Central Marine Fisheries Research Institute (CMFRI), in association with the Asian Fisheries Society Indian Branch, from the 25th to 28th of November 2015 at Kochi, India. The event will cover an array of topics related to cage culture under the broad headings of Marine Production Systems, Inland Production Systems, Breeding and Seed Production, Nutrition and Feed, Health and Environment Management and Economics, Livelihood and Policies
Record of double operculum in silver conch
Lentigo lentiginosus Linnaeus, 1758 is a
caenogastropod belonging to the family Strombidae.
The species is found in coral reefs and shallow parts
of lagoon and widely distributed across Indo-Pacific
region. The shells are moderately large, solid with
a characteristic deep stromboid notch, and a flared,very thick and posteriorly expanded outer lip with
a pinkish cream aperture and glossy parietal wall.
Size of the shell varies from 55 to 104 mm in length
and used in shell crafts industry
Genetic diversity among three Indian populations of black tiger shrimp (Penaeus monodon Fabricious, 1798) using microsatellite DNA markers
Genetic variation is an essential factor while selecting superior stocks for breeding programs. Eight microsatellite loci
(TUZX pm2.27, TUZX pm2.28, TUZX pm2.36, TUZX pm2.69, TUZX pm4.84, TUZX pm4.87, TUZX pm6.1 and TUZX
pm4.9) were used for molecular characterisation of Penaeus monodon collected from three different locations in India,
viz., Kakinada and Chennai on the east coast and Mumbai on the west coast and all the loci were found to be highly
polymorphic. The number of alleles and genotypes across the loci ranged from 5 to 23 and 42 to 98, respectively. The
observed heterozygosity among the populations across the loci ranged from 0 to 0.1678. The overall FST value was found to
be 0.021 (<0.05), which implies a low degree of population differentiation in the species. On the basis of pair-wise allelic
differentiation and UPGMA dendrogram, the investigated samples from three locations were allocated in to two distinct
populations composed of east coast and west coast populations
Cone Snails of India
Molecular taxonomy and phylogeny of cones (cone snails) and strombs (Mollusca, Gastropoda) of the Indian coas
Macro Flora & Fauna of the Gulf of Mannar a checklist
The Gulf of Mannar (GoM) located along the south eastern tip of India falls in the Indo-Pacific realm
and is one of the richest regions in the world from a marine biodiversity perspective. The region has a
distinctive socio-economic and cultural profile shaped by its geography. It has an ancient maritime history
and was famous for the production of pearls, an important item in trade with the Roman Empire as early as
the first century AD. Rameshwaram along the GoM with its links to the legend Ramayana is an important
pilgrim centre. The region has been and continues to be famous for its production of Indian sacred chanks.
It has unique ecosystems mainly consisting of coral reefs, sea grass beds, salt marshes and mangroves
which constitute important habitats for many species of commercially important finfishes and shellfishes.
The GoM was established as a Biosphere Reserve (the first marine biosphere reserve in south and south
east Asia) by 1989 by the Indian Government and the state of Tamil Nadu. A biosphere reserve is an area
that is indented to secure the fundamental diversity of life in a region while continuing to advocate in
economic growth. The overall objective of this Marine Biosphere Reserve is to conserve the Gulf of Mannar's
globally significant assemblage of coastal and marine biodiversity and to integrate biodiversity
conservation into coastal zone management plans. Thus, the GoM in addition to being a national priority
also assumes global significance
Differentiation in morphometric traits of Chanos chanos stocks along the Indian coast
233-238Stocks of Chanos chanos (Milkfish) are identified based on the morphometric traits from four different locations from the Indian coast. A total of 246 fish samples were collected for the present study from the East coast (Mandapam Lagoon and Chilika Lake) and West coast (MandoviтАУZuari estuarine system and Cochin backwaters). Digital imaging techniques were employed to extract 18 morphometric characters from the specimens. Principal component analysis showed that horizontal depth measurements, dorsal fin length and pelvic fin length were helpful in differentiating the milkfish populations. First and second principal components explained the variance of 37.62% and 31.26 % respectively. Cross-validated results of the discriminant analysis showed the overall classification rate of 90.4%. The present study decoded the differentiation and occurrence of separate stocks of milkfish in Indian waters. The findings of the present study could be utilized for conservation and management of the species
Integrative taxonomy reveals that all the phenotype variations are not underpinned by genome in Conidae (Gastropoda, Mollusca)
The cone snails are hyper diverse group of marine gastropods and the shell morphology is the base of primary species identification. Among the Conidae, homoplasy and plasticity of morphological characters are common. Since speciation is positively correlated with peptide complexity in Conidae family, the present study was carried out to ascertain the genetic status of drastically varying phenotypes observed among the targeted Conus species of different environments and to detect cryptic species using mitochondrial and nuclear markers. Morphological parameters were recorded for the phenotypes of the species. Specific differences were observed for shell coloration
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