448 research outputs found

    The application of satellite generated data and multispectral analysis to regional planning and urban development

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    There are no author-identified significant results in this report

    A first instance of whale shark caught in Dol net and rescued in live condition at Gorai- Malvani, Maharashtra

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    The first observation of Rhincodon typus that was rescued live from Dol net on October 21 st, 2015 is given here. A male whale shark, about 6.5 m in length incidentally entered the Dol net at 30 m depth off Gorai-Malvani region, Mumbai. The net was hauled after about four hours with the help of a winch

    Disposal of catch from 'dol' net at Versova, Bombay

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    An account of disposal of catch from 'dol' net boats at Versova is given here. The disposal of catch depends upon the species and quality of the fishes or prawns

    A Note On The Long Line Fishery At Sikka, Gujarat

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    Sikka is a small fish landing centre in the Gulf of Kutch. Gill nets, stake net and long line are the gears used for fishing Long lines are made exclusively of material recovered from old gill nets and hence very economical. The fishermen have further stated that they are interested to develop this gear but wish to be assured of a good price for their catches besides ice plant and cold storage facilities

    Some aspects of biology of catfishes Tachysurus caelatus (Valenciennes) and Osteogeneiosus militaris (Linnaeus) from Mumbai

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    The results of investigations on some aspects of the biology of Tachysurus caelatus and Osteogeneiosus militaris are presented. The fishes fed on crustaceans followed by fishes, molluscs and polycheates. Gestating males were found starving. The occurrence of mature females and gestating male parents indicate that T.caelatus, spawns during February-June and O.militaris during August-April. T.caelatus attains 50% maturity at a total length of 40.8 cm and O.militaris at 33.0 cm. Females predominant the catch of both these species. Fecundity varied from 44 to 81 ova in T.caelatus and 27 to 61 ova in O.militaris. The maximum number of incubated eggs recorded from oro – buccal cavity of T.caelatus and O.militaris was 54 and 56 eggs respectively. The length- weight relationships of these fishes pooled for both sexes are: T.caelatus: Log W= - 5.57881+3.24007 Log L. O.militaris: Log W = - 4.86014 + 2.92293 Log L

    Some aspects on the biology of Himantura bleekeri (Blyth) and Amphotistius imbricatus (Schneider) from Mumbai

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    Himantura bleekeri and Amphotistius imbricatus are bottom carnivores, with crustaceans ranking first in the food items followed by teleosts, molluscs and polychaetes. Number of poorly fed individuals was high in both the species. These species breed throughout the year. The male : female ratio of H. bleekeri for 1989-’05 and of A. imbricatus for 1997-‘05 were 1:0.98 and 1:1.36 respectively. The length-weight relationship was: Log W= -8.7298 +2.7297 Log L for H. bleekeri and Log W = - 6.4691 +2.3119 Log L for A. imbricatus

    Skate fishery and some biological aspects of five species of skates off Mumbai

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    Skate landings as bycatch of trawlers at Mumbai declined from 1204.4 t in 1989 to 194.6 t in 2003, with an average annual landing of 334.8 t, at a catch rate of 248 kg/hr. The fishing pressure has reached optimum level, which is evidenced by a decline in catch and catch rate of skate population. Rhynchobatus djiddensis (93.2%) was the most dominant species, which landed throughout the year. Infomations on the biology of five species Rhynchobatus djiddensis, Rhina ancylostoma, Rhinobatus granulatus, Rhinobatus obtusus and Rhinobatus annandalei are presented

    Cost and earning of two different sized 'dol net' boats at Versova (Bombay)

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    The cost and earning of 7.5 and 12 m boats engaged in 'dol net' fishing are presented in this document. In the coastal sector of Maharashtra 178 mechanised boats are exclusively engaged in 'dol net' fishing of which 60 are small (7.5 - 9.0 m) 47 medium (9.3 -12.0 m) and 71 large (over 12 m). Two types of boats viz. 7.5 and 12 m long classified as small and medium respectively were selected and data on daily expenditure, catch, species composition and value realized were collected for three years continuously from 1983 - '84 to 1985 -'86. During 1983 - '86. The profit for small sized boats varied from Rs. 16,988/- in 1984-'85 to Rs. 23,411/- in 1985-'86; whereas in the case of medium sized boats there was a loss of Rs. 15,887/- in 1983 - '84. This type of boat realized a maximum profit of Rs. 32, 897/- but considering the expenditure involved, the small sized boats were found to yield better return than the medium ones

    Versova a well-organised fishing village

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    Versova is a coastal fishing village -within - the " city" limits of Greater Bombay. On its northern side is Versova creek and on the western side is the" Madh island and the Arabian Se

    Recurring fish mortalities at Versova stress exigency for new strategies of conservation

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    Versova is an important fishing village of Bombay district and Versova creek is situated near the sources of organic and industrial pollution which discharge their waste indiscriminately into it. However, recently increasing incidents of fish mortality along with depletion of fish catch have affected the fishermen to a large extent. Out of 12 different types of nets with a total number of more than one thousand nets which were operated here, only seven types with about three hundred nets are remaining in operation. During October 1988 mortality of many commercially important species like Mugil, Cynoglossus, catfishes and sciaenids was noticed. Subsequent mortalities were observed during 1991, 1993 ' and 1995 with more number of species. Monitoring of creek water which was mostly a blend of black, brown and gray colour with foul smells revealed that many times dissolved oxygen is absent here when in adjoining areas it is up to 4 d l , pH of the creek was always in lower range and even salinity value dropped up to 1.29 x lo-' due to added influx of fresh water by way of domestic and industrial discharge and making it unsuitable for marine organisms
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