Sasidharan Pillai, N K; Dr.Shahul,Hameed M(Cochin University of Science and Technology, October 24, 1984)
[+]
[-]
Abstract:
The present study of the parasitic copepods gives an account of the taxonomic description of seventy seven species of parasites collected from the food fishes
of the Kerala coast. Out of the seventy seven species described, fourteen are new to science, two new records for the Indian waters and ten new host records. The
males of Parapetalus longipinnatus Rangnekar and Lerna~thropus indicus Pillai were collected and described for the first time. The parasites described belong to the suborders Cyclopoida, Caligoida and Lernaeopodoida. The
available description of many species of this locality is reviewed and supplemented with the help of the present detailed study. The general observations made during this study reveale certain interesting aspects of the host parasite relationship, host specificity, adaptive modification and geographical distribution. A brief discussion
of these observations made is also presented.
Description:
Department of Industrial Fisheries, School of Marine Sciences
Cochin University of Science And Technology
Shobha,Prataprao Shere; Dr.Ramachandran Nair,P V(Cochin University of Science and Technology, March , 1985)
[+]
[-]
Abstract:
Studies on sporulation of four commercially important red
(sea-weeds) algae ^(agarophytes) namely Gelidiella acerosa, Gracilaria
corticata, G edulis and Hypnea musciformis growing in the
vicinity of’ Mandapam coast were carried out from October 1981
to September 1983. During the two years of study; fruiting
behavior in the natural population of these species was also
investigated. Laboratory experiments were carried out with
the four algae sea weeds to collect information on seasonal aspects of spore production and diurnal variation of spore shedding. Detailed studies were made under laboratory conditions to know the effects of some selected environmental factors such as desiccation, salinity, temperature, light intensity and photoperiod on spore output in Gelidiella acerosa, Gracilaria edulis and kypnea musciformis hydrological data were also collected from the inter-tial region around mandapam area. The result obtained on all the above aspects are presented in this thesis
Revi Kala, S; Dr. Ramamurthy, V D(Cochin University Of Science And Technology, March 14, 1985)
[+]
[-]
Abstract:
The present study was undertaken to observe the phytoplankton (distones,dinoflageliates,and blue green algae) blooms occurring along the south west coast of India at various seasons from February 1982 to august 1984.The centers selected for collection and observation were off Quilon, off Alleppey ,off Calicut. A total number of 25 phytoplankton blooms were studied. Characterisation of phytoplankton blooms include observing the cell counts from the day of its appearance to its day of disappearance. The appearance ,duration and locality of the blooms were also noted
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Prasannakumar, S; Dr.Kurup, P G(Cochin University Of Science And Technology, April , 1985)
[+]
[-]
Abstract:
Sediment transport in the nearshore areas is an
important process in deciding the coastline stability. The
design and effective maintenance of navigable waterways,
harbours and marine structures depend on the stability of
the sediment substrate and the nature of sedimentation in
the nearshore zone. The nearshore zone is a complex
environment and the exact relationships existing between
water motions and the resulting sediment transports are not
well understood. During the rough weather season, when the
sediment movement is considerable, processes occurring in
the nearshore area are much less understood. Moreover,
there is a general lack of field measurements, especially
during the time of severe storm conditions. The increasing pressures and the concern on the
preservation of the valuable coastal environment have
led to the development of shore protection programmes.
Conservation not only demands knowledge of what needs to
be done, but also requires the basic processes to be fully
understood. Considering the fragile nature of barrier
beaches and intense occupancy of these areas by man, these
coastal features have long been a subject of study by
coastal oceanographers, geomorphologists and engineers.
The present study is an attempt to understand the
sediment movement in relation to beach dynamics, especially
in the surf zone, along some part of Kerala coast and the
response of the beaches to various forcing functions over
different seasons
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Chandrasekaran, M; Dr.Lakshmanaperumalsamy, P; Dr.Chandramohan, D(Cochin University of Science and Technology, April , 1985)
[+]
[-]
Abstract:
The aim of the present investigation is to build up the knowledge on the role of commensal bacteria present on the prawns during storage at various temperatures. The study Evaluates the nature of spoilage of prawns during storage at three different temperatures (28:2OC, 4°C and -18°C) by organoleptic assessment, accumulation of trim ethylamine, ammonia content, changes in the flesh pH and total heterotrophic bacterial population at various time intervals and to find out the changes in the proximate composition (protein, carbohydrate, lipid, ash and moisture) of the prawns during storage at various temperatures by estimating the contents at different time intervals along with spoilage assessment. The researcher studies the occurrence and role of various bacterial genera which form the component of spoilage flora during storage and determines the distribution of various hydrolytic enzyme producing bacteria by evaluating their ability to produce enzymes such as caseinase, gelatinase, amylase, lipase and urease. to assess the spoilage potential of the bacteria by testing their ability to reduce trimethylamine oxide (TMAO) to trimethylamine (TMA) and to produce odour in flesh broth and halos in flesh agar media.The researcher also gives stress on the growth kinetics of selected potential spoilers by growing_them in different media and to assess the effect of sodium chloride concentrations, temperature and pH on their growth, survival and. generation time.
Description:
School of Marine Sciences, Division of marine biology, microbiology and biochemistry, Cochin University of Science and Technology
Krishnamurthy,V; Dr.Samuel, C T(Cochin University of Science and Technology, July , 1985)
[+]
[-]
Abstract:
The thesis deals with the bacterial flora of the Cochin backwaters. Sediment and the prawns
caught from these backwaters in quantitative and qualitative terms, their growth in relation to temperature, their susceptibility to various antibiotics, their role in terms of food for juvenile prawns and the presence of bacteria of public health significance. According to the researcher such a comprehensive study would be of some relevance to shell-fish processing industries apart from its academic value. The effect of antibiotics on the bacteria and the utility of bacteria as food for the juvenile prawns are studied and presented in different chapters.
Description:
School of Marine Science, Department of Industrial fisheries, Cochin University of Science and Technology
Silas, Ebenezar A; Dr.Parameswaran Pillai, P(Cochin University of Science and Technology, August , 1985)
[+]
[-]
Abstract:
A perusal of the literature shows that most of the earlier works on the ecology and productivity from the Indian waters have been confined to the estuarine ecosystms and
contiguous neritic and oceanic water bodies. Although some information is available on certain aspects of the envirornental parameters from the ‘coastal lagoon ecosystem‘, there is hardly any indepth study on the ecological and productivity problems from "derlict saline lagoonal
environment" in India . In view of this, the researcher undertook a study on the subject "ecology and productivity“ of a typical “coastal saline lagoon"(Pilla;headan lagoon) situated along the southeast coast of India for a period of two years!-N11, 1982 to June, 1984) , and the results of the investigations are embodied in the present thesis entitled "studies on the ecology and productivity of saline lagoon‘.
Santhosh, M; Dr.Nair, N G K(Cochin University of Science and Technology, September , 1985)
[+]
[-]
Abstract:
The Kerala region which forms a significant segment of the
south—western Indian shield, dominantly comprises charnockites,
khondalites and migmatitic gneisses of Precambrian age.
Recent investigations have revealed the occurrences of a
number of younger granite and syenite plutons in this region,
.spatially related to regional fault—lineaments. The granite
of Ambalavayal in Wynad district of northern Kerala is a
typical member of this suite of intrusives. The thesis is
based on a comprehensive study in terms of geology, petrology,
geochemistry and petrogenesis of the Ambalavayal granite,
basement gneisses, associated pegmatites, quartz veins and
related mineralization that together cover an area of about
90 sq km in wynad district of northern Kerala.
Santosh, M; Dr.Nair, N G K(Cochin University of Science And Technology, September , 1985)
[+]
[-]
Abstract:
The Kerala region which forms a significant segment of the
south—western Indian shield, dominantly comprises charnockites,
khondalites and migmatitic gneisses of Precambrian age.
Recent investigations have revealed the occurrences of a
number of younger granite and syenite plutons in this region,
.spatially related to regional fault—lineaments. The granite
of Ambalavayal in Wynad district of northern Kerala is a
typical member of this suite of intrusives. The thesis is
based on a comprehensive study in terms of geology, petrology,
geochemistry and petrogenesis of the Ambalavayal granite,
basement gneisses, associated pegmatites, quartz veins and
related mineralization that together cover an area of about
90 sq km in wynad district of northern Kerala
Madhusoodanan,P; Dr.Sharma,G S(Cochin University of Science and Technology, October , 1985)
[+]
[-]
Abstract:
At intermediate depths of the Arabian Sea, the circulation and characteristics of water are more
influenced by the high saline waters from the north and low saline waters from the south of equator. The interaction of these waters which greatly differ in characteristics is less understood compared to that at the upper layers. An understanding of the nature of the intermediate waters is of vital importance not only because of the unusual characteristics of the waters but also due to the influx of the different water masses from the neighbouring Red Sea and Persian Gulf. Hence, in the present investigation, it is proposed to study the water characteristics and current structure of the intermediate waters in the Arabian Sea through the distribution of the water properties on the isanosteric surfaces of 100, 80, 60 and 4O—cl/t, vertical sections, and scatter diagrams An attempt is also made to present the potential vorticity between different steric levels to understand the circulation and mixing processes. Data collected during and subsequent to International Indian Ocean Expedition (IIOE) are used for this study. The thesis has been divided into six chapters with further sub divisions