1,554 research outputs found
Influence of mangrove ecosystem on the biological resources and fishery of Kakinada
Since there are no records of detailed
investigation on the ecology of the mangrove
Kakinada around Kakinada and keeping in view
of the vastness, fertility and biological resources
of the Kakinada Bay and the adjacent sea, the
Institute took initiative to conduct a study on the
ecology of mangrove areas around Kakinada
during 1982-'85 to understand the various
ecological aspects connected to the water, soil/
sediment and mangrove-associated fauna and
their influence on fisheries
Studies on the mangrove ecosystem
Mangrove ecosystem is one of the most specialised and
productive coastal habitats in the world. Due to human interference
in many ways, most of the mangrove forests are on the verge of
destruction and disappearance. The main causes for the
degradation of Indian mangroves are land reclamation, pollution
and overexploitation of the resources. A proper understanding of
this specialised ecosystem and careful implementation of the
conservation measures would alone save the ecosystem from further
destruction and extinction. The present account deals with the
ecological aspects of the mangrove habitats covering their extent,
distribution, zonation, biological assemblage, hydrography and
productivity, and giving importance to their role, man-made impacts
and conservation aspects with emphasis on the approaches for the
sustainable use of this ecosystem to the mankind with special
reference to the mangroves of India
Occurrence of giant male and female groupers with a note on sex change in groupers
Serranid fishes are popularly known as
'Groupers' or 'Rock cods' and locally 'Kalava'.In view of their importance
in the capture and culture fisheries, the
present account on the record of giant female
groupers [Epinephelus tauuina (Forskal),
Epinephelus malabaricus (Bloch and Schneider)
and Promicrops lanceolatus (Bloch)] of more
than two metres in total length and their sex
ratio] in the natural population from the Indian
coast (Table 1) deserves special attention
Mariculture in India, its potentialities and practical applications
India is passing through a very
critical period of food crisis and consequentiy
calling for the necessity
of adopting various techniques and
methods to augment the food production.
Among them , mariculture is an important
means of getting additional source of
human food
Marine fisheries development in Tamil Nadu
Fisheries development is governed by the stock of fishery resources, the level and types of fishing effort and the use of diversified craft and
gear. The growing Importance of fishery resources and the level of their exploitation are traced in this paper. The marine capture fisheries account
for a substantial proportion of the total fish production in Tamil Nadu. The present level of fish landings, their seasonal variation and the major
species groups are brought out. The developmental programme aimed at increasing fish production are reviewed. The need for innovations In and
diversification of fishing methods is highlighted. The Impact of investment on fish production is analysed with a time frame of ten years. Basic needs
of fisher folk which have a bearing on fisheries development are identified. Technological developments made over the last decade are mentioned
with a note on the extent of non-adoption of new technology and the major determinants thereof are pointed out for remedying the situation.
Culture practices in suitable areas along the coasts are stressed to provide employment opportunities that step up production. Developments in
the preservation and processing of the sea foods are presented and the scope for the establishment of a stable Internal and external market is
explored. The state of affairs of marine or coastal fisheries management and suggestions for toning up resource management are stressed. The
need for sea ranching and SCUBA diving Is Indicated. The vital feature of training and the nature and areas of extension programmes are also
pointed out for ushering In speedier development of the sector
Notes on the juveniles of the rock cod Epinephelus tauvina (Forsskal)
The occurrence of the very young juveniles of the rock cod Epinephelus tauvina (Forskal) in Cochin
backwater during February-June is reported here with brief notes on the morphometric variations between
juveniles and adults and food and feeding habits of juveniles
Some observations on primary production and plankton biomass along the continental shelf and slope off the northeast coast of India during January 1989
The present study deals with the quantitative aspects of chlorophyll pigments,
primary productivity and plankton biomass from the continental shelf and slope off
the northeast coast of India between 16┬░ and 20┬░N latitudes towards the end of
northeast monsoon season. In surface waters, the mean values of chl-a, -b, and -c
were 0.249,0.275 and 0.837 mg/m^ along the shelf and 0.246,0.260 and 0.805 mg/m^
in the slope respectively while the net primary productivity values were 0.074 and
0.081 g C/m /d for the shelf and slope waters respectively. Column productivity in
the upper 0-50 m water in the shelf and slope regions were 2.9 and 3.25 g C/m /d with
an average production of 3.08 g C/m /d. Higher rate of production was observed
around 18┬░ and 20┬░N latitudes. Zooplankton biomass exhibited progressive increase
in volume from 16┬░ to 20┬░N. The estimated mean zooplankton biomass volume of the
study area was 28.83 ml/m . The mean transfer coefficient from primary to secondary
production was found to be 14% when 50% of the zooplankton biomass was
considered as the daily rate of production. From the mean primary and secondary
productivity values, potential tertiary production of pelagic fishery resources in the
upper 0-50 m water column of the study area for the month was assessed
Rare Chimaeroid and Elasmobranch fishes from the continental slope off the West Coast of India
During exploratory trawling from the upper continental slope in depths between 180 and 450 metres off the West Coast of India, specimens of the Chimreroid fish Neoharriotta pinnata (Schnackenbeck) and the rare elasmobranchs Echinorhinus b"UC11S (Bonnaterrc) and Atractophorus armatus Gilchrist have been obtained. All three are new distributional records for Indian Seas and they are described and illustrate
Coefficient bounds for some subclasses of p-valently starlike functions
For functions of the form we obtain sharp bounds for some coefficients functionals in certain subclasses of starlike functions. Certain applications of our main results are also given. In particular, Fekete-Szego-like inequality for classes of functions defined through extended fractional differintegrals are obtained
Eulerian character degree graph
We obtain a necessary condition for the character degree graph of a solvable
group G to be Eulerian.Comment: 11 page
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