Radhakrishnan Kalidoss

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• PhD Student at Central Institute of Fisheries Education

Poster about how the climate change was affecting food security in Agriculture depended countries like South Asian Countries

Climate change poses significant challenges to global food security, particularly within the fisheries sector, where fish production is highly sensitive to climatic variables. This study investigates the long-run and short-run impacts of climate change on fish production in four major fish-producing countries, China, India, Vietnam, and Bangladesh,...

Mariculture, a sustainable and rapidly growing aquaculture sub-sector, meets global seafood demand while reducing strain on wild fish stocks and continues to expand worldwide. However, rising feed and seed costs pose significant challenges, overshadowing other farming expenses. Climate change exacerbates the profitability of sea cage farming, incre...

We investigated the effect of various carbon sources on the production performance of critically endangered Hypselobarbus pulchellus in biofloc system. The experimental setup comprised four biofloc treatment groups with various carbon sources (jaggery, tapioca, rice and corn flour) and a control group. Healthy early fry (0.0068 g) was randomly stoc...

Sustainable intensification of shrimp aquaculture has gained significant attention to meet the animal protein need of the growing world population but the multi-stakeholdership of water resources has pushed it to adopt "more crop per drop" strategy. Lack of scientific evidence regarding the profitability from intensified systems is hampering the in...

Shrimp aquaculture is a rapidly growing industry globally, primarily due to the high value of shrimp in the seafood market. Nonetheless, conventional intensive farming practices with high water exchange rates can result in disease outbreaks and detrimental effects on the environment. Biofloc Technology (BFT) has emerged as a sustainable alternative...

A study was conducted on the design and the operational details of fishing gears and craft operated from 54 fishing villages bordering the Pulicat lagoon, one of the important lagoons of India (lat. 13.5593° N, long. 80.2098° E). Information was collected from 320 respondents covering a minimum of 5-7 fishermen from each fishing village. The invest...

The present study addresses the crucial sustainability concerns in small-scale fisheries (SSF) against the backdrop of escalating anthropogenic activities and climate change impacts on marine fishery and ecosystems. Our study focused on a traditional fishery exploitation area spanning 12,646.12 km2 along the Southwestern Coast of Kerala, India, and...

The end product of germ cell maturation is the spermatozoa that are produced through a definite pattern in nature that requires a special environment. During proliferation of diploid germ cells, the spermatogonia repopulate the testis lobules by mitotic cell division. The natural germ cell proliferation and maturation has been modulated and manipul...

The present study was conducted to check the disparity between wild and cultured stock of Amblypharyngodon mola using the bio-morphometric data and meristic characteristics such as length-weight relationship (LWR) and relative gut length (RGL). A total of 656 specimens were collected using drag net and cast net for a period of one year from Daya ri...

Vasanth, K.; Muthupandi, K.; Naganandhini, V.; Kumar, M.; Krishnan, A.; Patolla, H., and Radhakrishnan, K., 2023. Effect of J-hook shapes on catch rate, efficiency, and hooking position of Needlefish: Evidence from Palk Bay, India. Journal of Coastal Research, 39(5), 933–939. Charlotte (North Carolina), ISSN 0749-0208. The efficiency of different s...

Sustainable and judicious exploitation of marine resources has been a highly debated topic in recent times, in particular relation to the growing environmental impacts such as diminishing fish stock, changes in climate leading to uncertain economic profitability in marine capture fisheries. Developing countries like India suffer the most due to the...

Intensive aquaculture productions in open water release particulates and dissolved waste into the environment. There is also a growing concern about nutrient uptake from wastes of aquaculture, as well as promoting more sustainable aquaculture development. In order to meet the demands of the world, aquaculture is striving to establish production str...

The contribution of needlefishes from the Gulf of Mannar coast has been remarkable and is presently exploited by pelagic longlines. The J hook is extensively used in longline fishing in the Indian region to capture carnivore fishes, including needlefish. Catch rate significantly differed between the hook numbers. In this context, three hook numbers...

The contribution of needlefishes from the Gulf of Mannar coast has been remarkable and is presently exploited by pelagic longlines. The J hook is extensively used in longlines in the Indian region to capture carnivore fishes, including needlefish. The catch rate significantly differed between the hook numbers. In this context, three hook numbers of...

A total of 15 fishing trips were conducted to analyze the efficiency of different J hooks shapes along the coastal waters of the Gulf of Mannar from February to August 2022. The percentage compositions of the carangids using kirbed hooks appeared to be 43.75%, 30.68% for reversed hooks, and 25.56% for straight hook, the overall hooking rate of cara...

The J hooks are extensively used in longlines in the Indian region to capture carnivore fishes, including needlefish. In this context the standard J hook No 11 was compared with the modified needlefish longline (MNL) with EZ baiter hook No. 8/0. The MNL were operated in locations along the Gulf of Mannar coast from April to October 2022. Throughout...

The efficiency of different 'J' hooks No 7, 8 and 9 in carangids longline fishing gears were studied from January to August 2022. As revealed through the hooking rate, the highest percentage of contribution in terms of number was observed for Alectis indicus (35.6%), Caranx ignobilis (23.3%), C. hippos (17.0%), Scomberoides commersonnianus (13.8%)...

The length-weight relationships were estimated for 8 pelagic carnivore species caught in the Gulf of Mannar, India using experimental longlines. The experimental study from January to October 2022 in fortnightly intervals, using longlines (3000 m for needlefish and 11,250 m for carangids) equipped with size numbers 8 and 11 were carangids and needl...

Naganandhini, V.; Muthupandi, K.; Vasanth, K.; Neethiselvan, N.; Padmavathy, P., and Radhakrishnan, K.,. Influence of hook number on species composition, catch rate, and size of needlefishes in the Gulf of Mannar, India. The contribution of needlefishes from the Gulf of Mannar coast has been remarkable and is presently exploited by pelagic longline...

This study investigates the occupational diversity, work participation and economic contribution of men and women in the fishing households, dependent on one of the Asia's largest freshwater ecosystems, Wular Lake in India. Data was collected through face-to-face interviews with 170 fishing households from nine major fishing hamlets located on Wula...

Identification of spatial gradient in the vulnerability of white leg shrimp production to climate change is imperative in the formulation and implementation of suitable adaptive measures. A composite vulnerability index was computed by employing 36 variables pertaining to exposure (11), sensitivity (11) and adaptive capacity (14) dimensions to map...

Rita chrysea, Mahanadi rita is a freshwater catfish that belongs to the family Bagridae, which is endemic to the Mahanadi River system of India. It is one of the least studied species in the Bagridae family. This study was undertaken to report the taxonomic characteristics, length and weight relationship, food and feeding habit, and reproductive bi...

Climate change and temperature variations are of paramount importance to aquaculture. Here, we investigated the thermal stress response of five life stages of tilapia viz. spawn, fry, fingerling, juveniles and adults exposed to different temperatures (28°C to 40°C). Stress response was assessed in terms of survival/mortality, thermal shock, changes...

The present study was conducted to check the disparity between wild and cultured stock of Amblypharyngodon mola using the bio-morphometric data and meristic characteristics such as length-weight relationship (LWR) and relative gut length (RGL). A total of 656 specimens were collected using drag net and cast net for a period of one year from Daya ri...

The study was conducted to examine the functional details of Paadu system of fisheries management in Pulicat Lagoon, India (lat.13.5593° N, long.80.2098° E). Data were collected through interview schedule and group discussion from a total of 150 respondents covering seven to ten fishermen from each fishing village – 180 Paadu fishing grounds. Based...

Paramount comprehension of gender roles in fisheries is essential to value the often-concealed role that women play in fisheries and households. We examine the women’s contribution to household income and livelihood security using the qualitative data collected through random sampling from 58 fishers – 24 women and 34 men – in Visakhapatnam distric...

Capture marine fisheries play a significant role in social, cultural, and economic dimensions of Indian capture fisheries that contributes to the blue growth strategies. Here the small-scale fisheries (SSF) constitute about 60 % and remaining 40 % large-scale fishing fleets (LSF). In this study, we have highlighted the techno-economic key indicator...

The Asian catfish, Clarias magur, is an endangered fish species, which is immensely important due to its high commercial value in India and other South‐East Asian countries. Various anthropogenic activities and natural habitat loss have greatly impacted the biodiversity of C. magur in natural water bodies, leading to the addition of this species to...

Nutritional quality of Artemia used in prawn hatchery determines the quality of seed output and its performance in the culture. The present study aimed at determining the effect of n-3 HUFA enriched Artemia feeding on growth and survival of postlarvae (PL) of M. rosenbergii. The Artemia were fed with n-3 HUFA emulsions at 2 ml L-1 and samples were...

Shrimp is the most traded food commodity in the world; the majority of it was sourced from farming. Shrimp farmers need to be technically efficient to be globally competitive. We measured the technical efficiency of shrimp farms with a stochastic production frontier to identify the socio-economic characteristics and input variables that determine i...

Larval growth and survival are significantly influenced by the various biotic and abiotic factors. Rearing tank background colour is one such factor affecting the larval production in finfish hatcheries. The present study evaluated the effect of five tank background colours (black, white, blue, green and red) on growth and survival of larvae of two...

Aquaculture provides the cheapest source of animal protein to about 13% of the world population and employs an estimated 24 million people. The industry is projected to meet the global deficit of fish protein by 2020 due to stagnant marine fish landings. Although the sector is diverse in terms of species cultured and farming practices, cage culture...

The present study attempted to evaluate the economics and marketing of dry fish production in Thoothukudi District of Tamil Nadu, India. The information on various aspects of the dry fish enterprise was collected through random sampling of 29 dry fish producers in a pre-structured interview schedule. The results indicated that 50% of the total dry...

Cobia Rachycentron canadum, also known as black kingfish, is the only species in the family Rachycentridae. It is commonly found throughout the world, except the central and eastern Pacific (Shafferand Nakamura 1989). Cobia is a pelagic species found in the water column of the open ocean from the surface to a depth of 1200 m (Shaffer and Nakamura 1...

This study profiles the growth and instability of the Indian fish and fishery products export and its performance over the past five decades. The results show that growth rates of seafood exports has been increasing, though the instability increased. The possible reason for the growth and instability of Indian fish and fishery exports have also bee...

Abstract This study profiles the growth and instability of the Indian fish and fishery products export and its performance over the past five decades. The results show that growth rates of seafood exports has been increasing, though the instability increased. The possible reason for the growth and instability of Indian fish and fishery exports have...

Marine fisheries contribute considerably to the national economy. Fastest growth rate has observed in marine fish production; is attributed equipment modernization in fishing crafts and advancement of fishing technology. Even though, same level of inputs are exerted; there is a discrepancy in their economic performance and efficiency. Therefore, pr...

In this work, we aimed to study the trend of the annual and seasonal mean rainfall and temperature of India over the period of 1901–2014. The long-term trend of rainfall and temperature was evaluated by linear regression and Mann–Kendall test. The magnitude of the trend was assessed by Sen’s Slope. In the last 30 years, the annual and summer rainfa...

In the present study, an attempt was made to measure the impact of inequality on income, asset and debt of inland fishers in the Theni District of Tamil Nadu, India. A total of 140 respondents were surveyed for this work. Gini index (GI) was applied to measure the income inequality and multiple regression was done to identify the influencing variab...

The present investigation is about the economic analysis of the hook and line fishery along the coast of Kombuthurai, Thoothukudi district of Tamil Nadu. Inferences from the study indicated that that hook number 5, 6 and 7 were found ideal for commercial exploitation of Carangids, Grouper, Barracuda and Needlefish in angling by wielding fresh condi...

This paper reveals the growth and instability of Tamil Nadu Marine fish production during the recent decade (2001 to 2010), across the year-districts wise and month wise. Emphasis is made to review the marine fisheries policies of Tamil Nadu to analyze its coherence with the marine fish production. From the study, it is observed that the growth and...

This paper reveals the growth and instability of Tamil Nadu Marine fish production during the recent decade (2001 to 2010), across the year-districts wise and month wise. Emphasis is made to review the marine fisheries policies of Tamil Nadu to analyze its coherence with the marine fish production. From the study, it is observed that the growth and...

In present study attempts has been made to document the fishing crafts and gears which operated in Thirumoorthy reservoir, Tamil Nadu. This investigation revealed, the post monsoon season had higher catch per unit effort of 11kg/boat/day by gillnet fishing and about 20 to 30kg/ day in cast net. Catla catla has the dominant fish species and accounte...

Thoothukudi District having a coastal line of 163.5 km stretches from Vembar in the north to south of Manappad (i.e., between 8° 9' 00" to 9° 7' 30" N latitude and 78° 2' 30" to 78° 25' 00" E longitude). Thoothukudi fishing harbour (TFH) is one of the oldest fishery ports in the east coast of India. Due to its commercial and economic importance fro...