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  • 1
    Electronic Resource
    Electronic Resource
    The annual reproductive cycles of Uca annulipes, Portunus pelagicus and Metapenaeus affinis (Decapoda: Crustacea) from the South-west coast of India (1971)
    Springer
    Marine biology 11 (1971), S. 152-166 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Employing the gonad index method, the reproductive cycles of three decapod crustaceans, Uca annulipes (Latreille), Portunus pelagicus (Linnaeus) and Metapenaeus affinis (Milne-Edwards) have been studied. In these crustaceans breeding is not continuous all the year round, but extends over several months of the year with distinct peak periods of gonadal activity. The male and female reproductive cycles are not concurrent. The peak of the reproductive cycle of males occurs slightly earlier in the breeding season than that of females. These studies indicate the possibility of production of successive broods of eggs during the same breeding season. In these species, the low saline conditions of the monsoon period are unfavourable for breeding. The medium and high saline conditions during the post-monsoon and pre-monsoon months, respectively, with plenty of planktonic food for the larvae, seem to be the favourable periods for breeding activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348765
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of Low Temperature on the Vertical Distribution of Two Wood-boring Crustaceans (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 814-815 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sectors approximately 50 cm. x 15 cm. x 5 cm. in size infected by borers obtained from nearby piles, were used in the experiments. These were acclimatized in a submerged condition from +6 C., the temperature of the surrounding water, to +2 C. during the course of 24 hr., after which they were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/182814a0
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  • 3
    Electronic Resource
    Electronic Resource
    Occurrence of Haemocoelic Erythrocytes containing Haemoglobin in a Wood Boring Mollusc (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 357-357 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. A group of haemocoelic erythrocytes in a blood sinus of Xylophaga dorsalis. The blood of this species possesses a light pinkish colour, and our observations suggest that this tint is a consequence of the presence of haemoglobin in the erythrocytes. Dried smears of the blood gave a positive ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/217357a0
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  • 4
    Electronic Resource
    Electronic Resource
    Food and feeding habits of the larvivorous fish Aplocheilus lineatus (Cuv. & Val.) in its natural habitat (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 20 (1982), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Results are presented of a study of the food and feeding habits of Aplocheilus lineatus under natural conditions and the manner in which dietary preferences are influenced by the habitat/environment, seasons and stage of maturity of the fish is explained, based on data from montly random samples collected for a year. A qualitative assessment of the diet reveals that it is not confined to a varied range of aquatic fauna, but also encompasses allochthonous fauna. Quantitative and qualitative analyses of the diet indicate its feeding habit which does not alter with size or seasonal changes. The range of prey consumed does not differ radically, qualitatively, as a function of size, but quantitatively exhibits five levels of discrimination and differential exploitation related mainly to prey size. Seasonal fluctuations in feeding are more qualitative than quantitative and seem dependent on the occurrence of food organisms. The lack of correlation between breeding and feeding is linked to extent of the development of the gonad in the body cavity. In conclusion, the potential of the fish as an effective biological control agent of mosquito larvae is indicated by the fact that dipteran larvae are a preferred item of its diet in all size groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1982.tb04715.x
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  • 5
    Electronic Resource
    Electronic Resource
    Shell Movements of a Wood Boring Bivalve (1967)
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 595-595 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have recorded and filmed the shell movements of Xylophaga dorsalis Turton. Adult specimens of this bivalve were obtained from laminated timber test panels exposed at Keppel Pier, Millport, on August 9, 1966, and recovered in August 1967. Xylophaga was found readily boring through such laminated ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/216595a0
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  • 6
    Electronic Resource
    Electronic Resource
    Some observations on the division of five species of commensalic ciliates in relation to water propulsion (1975)
    Springer
    Hydrobiologia 47 (1975), S. 367-380 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A study was made to understand whether there is any correlation between the physiological or morphogenetic activities of commensalic ciliates and the cycles of water propulsion of their hosts. Commonly occurring species ciliates. Boveria teredinidi, Trichodina balakrishnia, Nucleocorbula adherens, Thigmozoon fencheli and Nyctotherus marina from the hosts Teredo furcifera and Nausitora hedleyi were used. The total number and the individuals in division for each species of ciliates were noticed. The results obtained indicate that there is no correlation between the activities of these ciliates and cycles of water propulsion. The data were statistically analysed. It was found that shipworms below 8 mm. in size were not infected with these ciliates. This shows that infection takes place, not from the parent's body but from the outside water after a definite period of growth of the host. An increase in number of commensals in relation with the increase in size of the host was observed. There is a decline in numbers in the oldest hosts. The number of dividing individuals also follows the same pattern of occurrence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039583
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  • 7
    Electronic Resource
    Electronic Resource
    Observations on the incidence and seasonal fluctuations of certain crustacean larvae in the plankton of the South-West Coast of India (1973)
    Springer
    Hydrobiologia 43 (1973), S. 443-461 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The seasonal fluctuations in the incidence of planktonic organisms and the larval forms of certain crustaceans such as crabs, barnacles and post larvae of prawns in the plankton of the south-west coast of India have been followed for a period of three years from 1963. South-west monsoon period is the least productive period for zooplankton in this area. Brachyuran zoeae, post larvae of prawns and barnacle nauplii occur in the plankton throughout the year with distinct peaks for different groups. The zoeae ofUca annulipes occur in the plankton from September to May with a peak during November–December. The zoeae ofPortunus pelagicus are present in the plankton from September to June and their abundance is in February–March. The post larvae ofMetapenaeus affinis are found in the inshore plankton from November to June with the peak in March. The nauplii ofBalanus amphitrite communis occur in the plankton in all the months of the year, the peak incidence has been during November January. The zoeae ofU. annulipes are found to tolerate better the medium saline conditions. Of the ecological factors, salinity of the ambient water and the availability of planktonic food for the larvae seem to influence the seasonal fluctuations of these crustacean larvae in this locality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015362
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  • 8
    Electronic Resource
    Electronic Resource
    Preliminary observations on the interstitial fauna of the south-west coast of India (1966)
    Springer
    Hydrobiologia 28 (1966), S. 101-112 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This paper presents the preliminary observations on the interstitial fauna of the south-west coast of India, made during the course of 1963–1964. Observations were made at four stations representing different ecological habitats. The influence of some factors, such as wave action, grain size, temperature and salinity on the fauna was studied. The occurrence, seasonal abundance and the nature of distribution of the different groups on the intertidal zone, were also studied at the four stations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00144943
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  • 9
    Electronic Resource
    Electronic Resource
    Observations on Pseudocycnus armatus (Bassett-Smith) parasitic on Indocybiuw guttatum (Bloch and Schn.) (1972)
    Springer
    Hydrobiologia 40 (1972), S. 69-76 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Observations on the nature, position and organs of attachment, the sucking organs, the alimentary canal and histopathology are recorded in the case of Pseudocycnus armatus (Bassett-Smith) parasitic on Indocybium guttatum (Bolch & Schn.) occurring along the South-West coast of India.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123593
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  • 10
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    Observations on the incidence and seasonal fluctuations of certain crustacean larvae in the plankton of the South-West Coast of India (1973)
    Springer
    Details
    Publication Date: 1973-12-01
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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