155 research outputs found
First record of tawny nurse shark, Nebrius ferrugineus (Lesson,1830) from the north-west coast of India
Sharks contribute about 2% towards the total
marine fish landings in India and are fished mainly by
hooks and lines. They are also caught by gillnets,
trawls and purse seines as bycatch. Sharks are widely
hunted for flesh, liver oil and fins which are mostly
exported to south-east Asia.The species composition
of sharks in Maharashtra comprised of Scoliodon
laticaudus (86.2%), Rhizoprionodon oligolinx (3.9%),
Rhizoprionodon acutus (0.7%), Carcharhinus sorrah
(2.2%), Carcharhinus limbatus (1%), Carcharhinus
macloti (0.1%), Lamiopsis temminkie (2.6%),
Sphyrna lewini (2.2%) and Galeocerdo cuvier (0.7%)
Stranding of baleen whale Balaenoptera sp. at Satpati Landing Centre, Thane District, Maharashtra
A baleen whale was found washed ashore at
Satpati Landing Centre, Thane District, Maharashtra
on 01.04.2011 (Fig. 1). Total length was about 12 m
and weight was approximately 10 t.Detailed
morphometric measurements could not be taken as
the whale was in highly putrefied condition
Fishery and biology of white sardine, Escualosa thoracata (Valenciennes) at Versova, Bombay
Gill net fishery exclusively for the white sardine, Escualosa thoracata, which started in mid-eighties at Versova, is described. During 1987-88 to 1991-92 periods, the annual average landing of the species was 202.2 tons with year to year fluctuations. The peak fishing season was during April-May. The size range of the species in the gill net was 41-105 mm and the von Bertalanffy growth parameters, L. and K, estimated by the ELEFAN program were 110 mm and 1.8 per year. The length-weight relationship was W=0.000001508 L(super 3.3946) for the males and W=0.000002561 L(super 3.2706) for the females. The food consisted of copepods, cladocerans and crustacean larvae. The size at maturity for the females was 82 mm and spawning took place during October - February period. The sex-ratio showed equal proportion except during January, July and October when females dominated in the catch
Scalloped hammerhead shark, Sphyrna lewini (Griffith landed by gillnetters at Sassoon Docks, Mumbai
A total of 650 kg of the scalloped hammerhead
shark, Sphyrna lewini locally called as тАШkan mushiтАЩ
was landed by about 11 gillnetters at Sassoon Docks
(old jetty), Mumbai on 22nd December 2010
Relationship between body size and certain breeding behavior in selected species of Elasmobranchs off Mumbai
Social organization in elasmobranchs is complex and poorly
understood. In India, no specific studies on the behaviour of this
resource have been published. Breeding behavior in six species
of sharks, two species of skates and three species of rays were
deduced from length frequency data in relation to body size and
sex. The species of sharks investigated are Scoliodon laticaudus,
Rhizoprionodon acutus, Carcharhinus macloti, Carcharhinus
sorrah, Carcharhinus limbatus, Loxodon macrorhinus and
Sphyrna lewini. The species of skates observed were Rhinobatos
annandalei and Rhyncobatus djiddensis and rays were Himantura
imbricata, Himantura alcockii and Gymnura japonica. Based on
the present observations mating areas, pupping and nursery
grounds for juveniles, segregation and aggregation of adults
were recorded
Length-weight relationships of ten tropical finfish species from north eastern Arabian Sea, India
The length weight relationships (LWRs) of ten tropical finfish species from north eastern Arabian Sea, India were studied. Specimens were caught using a wide range of fishing gear mainly trawl nets (20тАУ25 mm), dol nets or bag nets (20тАУ40 mm) and gill nets (80тАУ270 mm) operated in Maharashtra maritime waters during 2012тАУ2016. The specimens were measured for total length, and weight, then dissected and the sex confirmed. Previously unavailable in FishBase, the detailed LWR of Polydactylus mullani is reported for the first time. Maximum total lengths presented for six species in this study are new records. The existence of a differential growth between male and female was confirmed for five species, which was not known earlier. The LWR data will be useful for deriving future sustainable management and conservation strategies
Report of two surgeonfishes, Naso reticulatus and Naso lopezi from coastal waters of Maharashtra, Arabian Sea
Fishes of the family Acanthuridae (Perciformes),
called Surgeonfish, tang, and unicorn fish are
common marine fishes observed in tropical and
subtropical waters, with 85 valid species reported
in 6 genera (Fricke et al., 2022). In Indian waters,
Mohapatra et al., (2020) listed, 33 species of
surgeonfishes under 5 genera, however, missed 2
species listed by Nair et al. (2014), ie Naso lopezi
Herre 1927 and Naso thynnoides (Cuvier 1829),
and another 2 species listed by Rajan et al. (2013)
from Andaman waters ie, Acanthurus japonicus
(Schmidt 1931) and Zebrasoma velifer (Bloch 1795),
making the total surgeon fishes known from India
to 37
Revival of fishery of the thinspine sea catfish, Arius tenuispinis at Mumbai, Maharashtra
Catfish landings by trawlers in Mumbai comprise
of three major species viz., Arius dussumieri,
Osteogeneiosus militaris and Arius caelatus with
A. dussumeri, forming approximately 30-35% of the
landings. However, of late the landings of Arius
tenuispinis has showed an unusual upward trend at
New Ferry Wharf, Mumbai and the species is
observed in the catch almost throughout the year.
Analysis of A. tenuispinis catch data from New Ferry
Wharf during the period 1987 to 2012 clearly
indicates collapse of the fishery of this species,
showing signs of subsequent revival
First record of Bull shark, Carcharhinus leucas (Valenciennes, 1839) in commercial landings from New Ferry Wharf, Mumbai, Maharashtra
A female specimen of big eye hound sharkIago
omanensis measuring 66 cm was landed at Mangrol
fishing harbor on 17th September 2013. The specimen
was collected along with 13 others of the same
species. I. omanensis was not recorded earlier from
Gujarat
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