Gopikrishna Mantha

Kuwait Institute for Scientific Research | KISR · Ecosystem Based Management of Marine Resources Programme

The Adyar estuary is one of the highly productive transitional zones of southeast India, situated in the southern part of Chennai city and acts as a nursery ground for several endemic flora and fauna. Since few decades, due to anthropogenic activities,indiscriminate dumping and discharge of domestic and industrial wastes and pollutants has environm...

The subclass Copepoda is an important driving force in linking the lower trophic to higher trophic levels in aquatic ecosystems. Despite their ecological importance in marine waters, very little work has been done along the Red Sea since the early 19th century. Until now, about 276 species from 76 genera, 55 families, and 6 orders of copepods have...

Monthly abundance of the subclass Copepoda was analyzed from the zooplankton samples collected at Obhur Creek, Jeddah, Saudi Arabia during December-2011 till December-2012. Zooplankton samples were collected through surface horizontal tows by a modified WP2 net (via. mouth diameter 50 cm, length 180 cm, 150 μm mesh size). Order Calanoida dominated...

High solar radiation along with extreme transparency leads to high penetration of solar radiation in the Red Sea, potentially harmful to biota inhabiting the upper water column, including zooplankton. Here we show, based on experimental assessments of solar radiation dose-mortality curves on eight common taxa, the mortality of zooplankton in the ol...

Dyes are considered as a major pollutant released in industrial (leather, textile, and paper) effluents. In this study, the ability of Clinoptilolite in adsorbing an industrial dye (Violet 5BN) was assessed. Clinoptilolite was characterized by Scanning Electron Microscopy, Energy Dispersive analysis using X-ray and Brunauer, Emmett and Teller analy...

1  Efficient removal (~96%) of an industrial dye from simulated wastewater  Demonstrated the use of natural clinoptilolite in dye removal in 90 min  Adsorption was heterogenous, spontaneous and enthalpy driven 2 ABSTRACT Dyes in general are considered as a major pollutant which is released by many industrial effluents including leather, textile,...

Marine mammal sightings in Kuwait are very limited and opportunistic. At least, five species of marine mammals are documented from Kuwaiti waters including Balaenopterid whales. In this study we present a list of recent sightings of Bryde’s whale from Kuwait during 2009-2022. This study indicates that B. edeni seasonally occurs in Kuwaiti territori...

Sea slugs (nudibranchs) are marine molluscs which have lost their shell during the course of evolution and have the capacity to store bioactive chemicals in their body from their prey for defense. They exhibit extraordinary colour patterns, diverse range of prey preference and have adopted to hermaphroditic mode of reproduction. Arabian Gulf is a...

Coral reefs are the underwater gardens of the ocean, which has been subjected to very high rate of degradation due to climate change and various other anthropogenic impacts such as fishing, dredging, pollution, boat anchoring, coastal development etc. Kuwait's coral reefs lies in the North-Western Arabian Gulf as fringing reefs around Khubbar, Qaro...

In this study five new records and two probably undescribed species of heterobranch sea slugs placed in four genera, three families, and two orders are reported from Kuwait, northwestern Arabian / Persian Gulf with details and photographs. The present study increases the heterobranch diversity in Kuwaiti waters from 35 to 40 species. The range of h...

The workshop aimed to identify coherent, collaborative, and scientifically robust solutions to addressing taxonomic knowledge gaps in various stages from collection, preservation and archiving of biological samples and taxonomic data to identification and description of species. Specifically, the workshop focused on: (i) identifying specific needs...

Zooplankton and zooneuston observations were made at seven stations (four from the Gulf of Aqaba and three from the northern Red Sea), during September and October 2016. The main objective of this study was to assess the variability of nycthemeral fauna in relation to the sampling methods using two different types of nets namely, WP2 net and Neusto...

An investigation of illegal and unreported fishing in source countries, including product mixing during movement through intermediary countries and reprocessing in the product supply chain, indicates that 24–36% of 2.15 million tonnes of wild-seafood imports to Japan in 2015 contained material of illegal and unreported origin, valued at $1.6 to $2....

An investigation of illegal and unreported fishing in source countries indicates that 24–36% of 2.15 million tonnes of wild-seafood imports to Japan in 2015 were of illegal and unreported origin, valued at $1.6 to $2.4 billion, out of a total import of US$ 13 billion. A supply chain case study of crab imported from Russia illustrates the intricacie...

Zooplankton distribution, abundance and diversity were studied at 50 stations from 3 different locations along the southern coast of Saudi Red Sea between 16° 31ʹ N and 20° 16ʹ N. Zooplankton standing crop fluctuated between 1,058 and 25,787 individuals m⁻³ with an average of 5230 ind. m⁻³. Zooplankton community was dominated by holoplanktonic form...

The seasonality of abundance and live/dead compositions of copepods was studied in the northeastern Mediterranean Sea. Zooplankton, chlorophyll-a, and PO4 sampling was performed on a monthly basis from March 2006 to February 2007 at both a coastal station and an open water station. At the coastal station, high phytoplankton biomass was driven by PO...

The impacts of UV-B radiation to Red Sea coastal zooplankton was assessed experimentally at the time (May/June) of peak UV-B radiation, using the most abundant zooplankton species in the community (eight copepod genera, a cladoceran, an ostracod, a cumacean, and two meroplankton, including crab zoeae and megalopa). Mortality rates increased greatly...

Many ecological studies on the diversity and distribution of freshwater planktonic cyclopoid copepods are being published and they depend upon the molecular methods for accurate taxonomic identification. The greater coverage of reference species in the genetic database, GenBank, with the decreasing costs for DNA sequencing, have made large scale pl...

The diversity and abundance of cyclopoid copepods were investigated at four stations along the hydrothermal vent at Kueishantao Island, north-eastern Taiwan. Zooplankton samples were collected by surface tows. Qualitatively, 21 species of cyclopoids belonging to five genera and three families were observed. Our analysis revealed a number of abnorma...

Harpacticoid copepods were studied on sandy beaches of the Chennai coast of India from Jan. 2000 to Feb. 2001. This study provides the 1st quantitative account of these copepods on the southeastern coast of India. Surprisingly, harpacticoid copepod abundances more significantly differed among monthly samples than among stations. The total density o...

Meiofauna standing stocks and community structures were studied at five sandy beaches along the Chennai coast of the Bay of Bengal, at the SE coast of India from January 2000 to February 2001. Meiofauna densities ranged from 1341.14±1205.76 ind. 10 cm−2 to 3.73×106 ±4.1×105 ind. 10 cm−2. Mean abundance was highest during February 2000 (35 565.85 ±...

Diversity studies on the planktonic copepods of 2 stations (Muttukadu and Ennore) of the Chennai coast (13 o06N and 80 o18E) during Mar. 2002 to Feb. 2003 recorded 33 species. Of which calanaoids, cyclopoids and harpacticoids constituted 14, 13, and 6 species, respectively. Among calanoids species, Pseudodiaptomus, Centropages and Eucalanus were do...

Summary form only given. Diversity studies of copepods of 2 stations (Muttukadu and Ennore) of Chennai coast (13°06N and 80°18E) from Mar. 2002-Feb. 2003 recorded 33 species. Of which 14 species belong to calanoids, 13 species belong to cyclopoids and 6 species belong to harpacticoids. Among calanoids Pseudodiaptomus sp., Centropages sp. and Eucala...

Feeding experiments were performed on the postlarvae of Macrobrachium rosenbergii with two different livefeeds: a copepod - Mesocyclops aspericornis and a cladoceran - Macrothrix spinosa, keeping pellets as control feed. 20% mortality was recorded in pellet fed postlarvae. Mean initial and final weight of the Postlarvae were 21 mg and 122 ± 0.5 mg...