Cephalopod production in India and constituent maritime states

The fishing craft and gear in which cepbalopods are obtained in India and the all India, statewise and east and west coast cephalopod production are presented. The bulk of the cephalopod catches is obtained along the west coast and trawl net accounts for major portion of landings. Maharashtra, Kerala, Tamil Nadu and Gujarat are the leading states in production

Identity of common species of cephalopods of India

A key to the identification of the common cephalopods of Indian Seas which are of commercial importance is given with brief descriptions of nine species of cuttlefishes, six species of neritic squids, four species of oceanic squids, seven species of octopods and Nautilus pompilius. A Glossary of technical terms used in the descriptions of cephalopods is included

The exploited squid and cuttlefish resources of India; A review

Squids and cuttlefishes are one of the important marine fishery resources of india, ranking next only to Finfishes and crustaceans (shrimps and lobsters). Exploratory fishing conducted recently have revealed the existence of squid and cuttlefish resources in the continental shelf and oceanic areas. With the declaration of the exclusive economic zone there are vast stretches of fishing areas where fishing for squids and cuttlefishes could be carried out profitably. Recognizing the importance of these resources, the central marine fisheries research institute initiated investigations on the fisheries, resources characteristics and biological aspects of cephalopods at important fishing centers along the east and west coasts for a better management of the resources. The synoptic information presented in this paper is mainly based on the results obtained on the fishery and biological investigations conducted during 1976 to 1980

Distribution and exploitation of oyster resources along the southeast and southwest coasts of India

The oysters are sedentary bivalve molluscs which are gregarious and found in aggregates attached by their right shell valve to hard substrata, forming oyster beds or oyster banks in varied environments, intertidal and subtidal zones in shallow coastal waters, bays, creeks, lagoons, backwaters and estuarine environment. In India, natural stocks of oysters are exploited on a small scale at a number of places as a subsistence fishery and oysters are not cultured commercially

Stock assessment: squids and cuttlefishes at selected centres

Stock assessment studies have been made on the squid Loligo duvaucelii of Madras and Cochin areas, the cuttlefish Sepia aculeata of Madas area and Sepia pharaorUs of Vizhiiyam area. The exploitation rate, total mortality, instantaneous mortality, average annual stock and standing stock have been estimated and discussed. The study shows that in Vizhinjam area there is scope for increasing production in the existing fishing grounds

Blockchain-Enabled On-Path Caching for Efficient and Reliable Content Delivery in Information-Centric Networks

As the demand for online content continues to grow, traditional Content Distribution Networks (CDNs) are facing significant challenges in terms of scalability and performance. Information-Centric Networking (ICN) is a promising new approach to content delivery that aims to address these issues by placing content at the center of the network architecture. One of the key features of ICNs is on-path caching, which allows content to be cached at intermediate routers along the path from the source to the destination. On-path caching in ICNs still faces some challenges, such as the scalability of the cache and the management of cache consistency. To address these challenges, this paper proposes several alternative caching schemes that can be integrated into ICNs using blockchain technology. These schemes include Bloom filters, content-based routing, and hybrid caching, which combine the advantages of off-path and on-path cachings. The proposed blockchain-enabled on-path caching mechanism ensures the integrity and authenticity of cached content, and smart contracts automate the caching process and incentivize caching nodes. To evaluate the performance of these caching alternatives, the authors conduct experiments using real-world datasets. The results show that on-path caching can significantly reduce network congestion and improve content delivery efficiency. The Bloom filter caching scheme achieved a cache hit rate of over 90% while reducing the cache size by up to 80% compared to traditional caching. The content-based routing scheme also achieved high cache hit rates while maintaining low latency

A Comprehensive Analysis on Risk Prediction of Heart Disease using Machine Learning Models

Most of the deaths worldwide are caused by heart disease and the disease has become a major cause of morbidity for many people. In order to prevent such deaths, the mortality rate can be greatly reduced through regular monitoring and early detection of heart disease. Heart disease diagnosis has grown to be a challenging task in the field of clinically provided data analysis. Predicting heart disease is a highly demanding and challenging task with pure accuracy, but it is easy to figure out using advanced Machine Learning (ML) techniques. A Machine Learning approach has been shown to predict heart disease in this approach. By doing this, the disease can be predicted early and the mortality rate and severity can be reduced. The application of machine learning techniques is advancing significantly in the medical field. Interpreting these analyzes in this methodology, which has been shown to specifically aim to discover important features of heart disease by providing ML algorithms for predicting heart disease, has resulted in improved predictive accuracy. The model is trained using classification algorithms such as Decision Tree (DT), K-Nearest Neighbors (K-NN), Random Forest (RF), Support Vector Machine (SVM). The performance of these four algorithms is quantified in different aspects such as accuracy, precision, recall and specificity. SVM has been shown to provide the best performance in this approach for different algorithms although the accuracy varies in different cases

Some aspects of the biology of squids

The results of studies on the biological aspects such as sexuality, sex ratio, size at first maturity, spawning, age and growth, distribution of adults, food, predators,Iife-history and distribution of juveniles of three species of squids Loligo duvaucelii, Sephreuthis lessoniana and Doryteuthis sibogae are presented. The breeding period of all the three species was found to be prolonged. In Lotigo duvaucelii the males attained sexual maturity earlier than females in the various fishing grounds investigated

Utilisation and export of cephalopods

A major portion of the cephalopod catch in India is used as food in the coastal areas and a small portion as bait in the longline fishing. Other uses such as poultry feed, manure, abrasives etc. are also indicated. About one-third of the catch is exported as frozen cuttlefish, frozen cuttlefish fillets, frozen squids and cuttlebone. The trends in the export of cephalopod products in recent years are indicated

Cephalopod fisheries at selected centres in India

The cephalopod fisheries at eleven selected centres, Waltair, Kakinada, Madras, Portonovo, Mandapam, Rameswaram and Kilakarai on the east coast and Vizhinjam, Cochin, Mangalore and Bombay on the west coast have been studied and the annual and seasonal trends of the total cephalopod catches, species composition and CPUE investigated. Cephalopods were obtained in appreciable quantities in trawl nets in most of the areas studied. There is an organized fishery with hooks and lines for cuttlefish and squids at Vizhinjam. (Trivandrum)