2,553 research outputs found
Longbeak common dolphin Delphinus capensis (Gray, 1828) stranded at Karwar, Karnataka
A dead specimen of longbeak common dolpin
Delphinus capensis (Gray, 1828), locally called ‘handi
meenu’ which was floating approximately 500 m away
from sea shore of Aligadda village, Karwar was brought
ashore by fishermen and instructors of Karavali sports
club in the morning hours of 08.01.2011
Three baleen whales washed ashore along Uttara Kannada coast of Karnataka
Three instances of stranding baleen whales were
observed along the coast of Uttara Kannada district
of Karnataka during July and August 2016. All
strandings were recorded from the southern part
of the district.The first whale was washed ashore
on 20th July 2016 at Ramangindi, Dhareshwar, 12
km south of Kumta (140 21’ 710"N and 740 24’
360E). The whale was in a decomposed condition
when washed ashore. The post mortem was carried
out by a veterinary doctor. It was identified as
Bryde’s whale Balaenoptera edeni. The total length
of the male whale was 44 feet weighing
approximately 10 tonnes (Fig. 1). The second whale
washed ashore on 27.7.2016 at Hollangadde 7 km
from Kumta (140 27’ 432" N and 740 22’ 615" E was
also in decayed condition. It was identified as
baleen whale and measured 46 fee
Unusual landings of large sized Yellowfin tuna by purse seiners at Karwar, Karnataka
Unusual landings of large sized Yellowfin tuna
Thunnus albacares (Bonnaterre, 1788) was observed
at Baithkol Fisheries Harbour, Karwar during the
period 16th to 22nd February 2020. Six tunas were
landed by two purse-seiners with individual weights
ranging from 68 kg to 103 kg. One purse-seine unit
landed with only one yellowfin tuna weighing 68
kg in the early morning hours of 16.2.2020. The
other multiday purse-seine unit of OAL 19.8 meter
overall length (OAL) fitted with a 350 hp Sonatrac
engine was operated at a depth of 54 meter off
Belekeri (N 140 38’ 100” E 0730 52’ 500”) during
night hours on 18.2.2020 and four yellowfin tuna
weighing 103, 97, 82 and 78 kg each were hauled
in and sent immediately by a carrier boat to landing
centr
Stranding of Indian Ocean humpback dolphin along Uttara Kannada coast, Karnataka.
Strandings of two Indian Ocean humpback dolphins
along Uttara Kannada coast of Karnataka, during
November, 2019 and April 2020 is reported. One dead
dolphin was washed ashore at Murdeshwar beach
of Bhatkal taluk on 11.4.2020 in decayed condition
(Fig 1). Based on the external characters, with the
help of the available photograph it was identified
as a female Indian Ocean humpback dolphin Sousa
plumbea (G. Cuvier, 1829). It had beached about
one kilometre away from the northern side of the
Murdeshwar Temple,surrounded on three sides by
Arabian sea
Spectrum of the three dimensional fuzzy well
We develop the formalism of quantum mechanics on three dimensional fuzzy
space and solve the Schr\"odinger equation for a free particle, finite and
infinite fuzzy wells. We show that all results reduce to the appropriate
commutative limits. A high energy cut-off is found for the free particle
spectrum, which also results in the modification of the high energy dispersion
relation. An ultra-violet/infra-red duality is manifest in the free particle
spectrum. The finite well also has an upper bound on the possible energy
eigenvalues. The phase shifts due to scattering around the finite fuzzy
potential well have been calculated
Unusual occurrence of large size oilsardine (Sardinella longiceps) at Karwar, Uttar Kannada coast of Karnataka
The oilsardine, Sardinella longiceps
(Valenciennes, 1847), is a major pelagic fishery
resource of Malabar and Konkan coast. At Karwar,
the fishing season for oilsardine is from August-May
and the peak season is from October to March. During
the current year, after the ban period, the oilsardine
fishery by the purseseine boats started from the first
of August, 2011
Site and species selection criteria for cage culture
Site selection is the most important factor which determines
the commercial viability of mariculture systems. Cage culture
can be made possible only when the site for cage culture operation
is located, designed and operated to provide optimum water
quality and to avoid stress conditions. In addition to water and
sediment quality of the site some biological and natural
distribution information for the species should also be known
before a site is selected for cage culture. The selection of fish for
cage culture should be based on biological criteria, such as
physiological, behavioural characteristics and level of
domestication; marketing criteria and environmental criteria,
distribution and habitat of sit
A bumper catch of carangids in purse seines
An unusual bumper catch of carangids wasobserved in the purse seine landings at KarwarFishery Harbour on 23.10.2015. Although carangidsare landed in stray numbers by the purse seine unitsoperated from this harbour, they have never formeda major catch. During the month of October 2015,210 purse seiners (20 m OAL with 350 HP engine)were operated from Karwar Fishery Harbour
Olive Ridley turtle washed ashore
A carcass of an olive ridley turtle, Lepidochelysolivacea (Eschscholtz, 1829) was found washedashore on Cherai beach on 12.01.16. It was in abadly decomposed state, with only the head, frontflippers and part of the carapace intact, making itdifficult to take morphometric measurements
Heavy metal distribution in the biotic and abiotic matrices along Karnataka coast, west coast of India
Sediment and soft tissue of bivalve samples collected from various sites of Karnataka coast were
analysed for the estimation of the nanaal and anthropogenic heavy metal fluxes. Seasonal variations of
heavy metals in sediment and bivalves collected from selected hot spots from Binage, Karwar and
Thannirbavi, Mangalore were monitored. High concentrations of Hg was observed in the environment
near' the vicinity of a caustic soda plant at Binage, Karwar, indicating Hg pollution. Total Hg
concentration in the tissue of oysters sampled from a contaminated stream from the above site, exceeded
the safe limit of 0.5 ilg g.1 wet weight. The base-line heavy metal concentrations in sediment and
bivalves from selected sites of coastal Karnataka are presented
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