666 research outputs found
Productivity of Backwaters and Estuaries
The main reason why the backwaters and estuaries have been included in the Symposium on "The Biology of the Indian Ocean" is that, in certain regions of the Indian Ocean, the backwaters with their associated river system form a fairly large part of the inshore waters and influence the hydrography of the coastal water considerably
Pharmaceutical Potential of Marine Organisms
The use of extracts of plants and animals for medicinal purposes is a practice as old as the history of mankind. However, man's efforts have largely been confined to land plants and animals probably because of their easy accessibility. These represent only 20% of the earth 's total plant and animal life. The oceans, which cover about 71 % of the earth, support very rich plant and animal life, classified under more than 30 flora and faun a. Some of these are exclusively marine and thrive under extremely diverse environmental conditions
Production of living matter in the sea
There has always been a general
agreement among the sc ientists that many
more living organisms exist i~ the sea
than on land . Scientists have already
found about one hundred and fifty thousand
different forms of lifc in the sea
and they are adding to the list at thc
rate of aRDut three new ones per day.
S;ientists also believe that it is the sea
that hes been the first home of living
things
Are there enough shrimps in the sea?
The subject on shrimps seems very
timely indeed, because not a day passes
without our hearing or reading something
about the shortage of prawns in
Kerala. There seems a general agreement
amongst the fishermen and the
fishery industrialists that the shrimp
stocks are on the decline. Such a complete
agreement, however, does not
exist among the fishery scientists. A
considerable apprehension is also being
expressed by the other maritime
states of India, for they feel that what
Kerala is facing today, they might have
to face later on
Book Review: The fish resources of the Ocean (J.A. Gulland - comp. and ed.,)
QULLAND, J. A. [Compiler and Editor] 1971. The fish resources of the ocean.
Fishing News (Books) Ltd., Surrey, England, xi+special map section+255 pp.
Price ┬г 10.50
Time and Duration of the Spawning Season in some marine teleosts in relation to their distribution.
A part of a study of the biology of the common shore fishes
Blennius pholis and Centronotus gunnellus, the times and durations of the breeding seasons were determined and the cycles of maturation and depletion of the gonads were followed throughout the year. It then appeared that the breeding cycles of thc two species are very differen
Spawning frequencies and breeding seasons of some freshwater fishes with special reference to those occurring in the plains of northern India
It is well known that the differences in the spawning behaviour of teleosts
can to a certain extent be illustrated on the basis of the condition revealed
by тАв the unspawned eggs in the ovary (Heidrich, 1925; Clark, 1925, 1934;
Hickling and Rutenberg, 1936). Many studies on the ova diameter frequencies
have been undertaken during recent years and in almost all cases
it has been accepted that species which have all the ovarian eggs of similar
size spawn them together whereas those which have a wide range in oocyte
sizes may have several groups of eggs matured and shed periodically during
the breeding seaso
On Link Availability Probability of Routing Protocols for Urban Scenario in VANETs
This paper presents the link availability probability. We evaluate and
compare the link availability probability for routing protocols; Ad hoc
On-demand Distance vector (AODV), Dynamic Source Routing (DSR) and Fisheye
State Routing (FSR) for different number of connections and node density. A
novel contribution of this work is enhancement in existing parameters of
routing protocols; AODV, DSR and FSR as MOD-AODV, MOD-DSR and MOD-FSR. From the
results, we observe that MOD-DSR and DSR outperform MOD-AODV, AODV, MODOLSR and
OLSR in terms of Packet Delivery Ratio (PDR), Average End-to End Delay (AE2ED),
link availability probability at the cost of high value of Normalized Routing
Overhead (NRO).Comment: IEEE Conference on Open Systems (ICOS2012)", Kuala Lumpur, Malaysia,
201
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