Juvenile whale shark, Rhinocodon typus (Smith) caught at Vizhinjam

The present report is based on the landing of a juvenile whale shark in live condition entangled in Chala vala (gill net for sardines), on 26.12.2002 at Vizhinjam fish landing center. This paper also describes the morphometric measurements (in cm) of the whale juvenile shark in detail

New Record of Satyrichthys milleri Kawai, 2013 (Peristediidae) From Gulf of Mannar, Bay of Bengal

A specimen of Satyrichthys milleri Kawai, 2013 with the standard length of 221 mm was collected from Tuticorin fishing harbour, south east coast of India on 23rd October 2014. It was collected by bottom trawlers at a depth ranges from 200-250 m. This is the first attempt to provide a detailed description of the species from the Gulf of Mannar. This record was compared with the first reported specimen in order to compare the external morphology with known specimen. The present study constitutes an extension of the known distributional range of this species from the Andaman to the Gulf of Mannar

Towed Acoustic Countermeasures for Defending Acoustic Homing Torpedoes

The growing torpedo threat to ships and submarines demands effective countermeasures for defence. Detection, classification and localisation of an attacking torpedo is the first step towards launching effective countermeasures. Studies are on the rise to use the existing sonar systems to detect torpedoes and subsequently use countermeasures. The use of towed array sonar systems for torpedo detection and acoustic counter measures are the most recent and not reported much in open literature. This paper presents a modular acoustic counter measure approach using towed decoy against acoustic homing torpedoes. Describes the technologies and algorithms required for different modes of towed decoy, which is effective against both active and passive acoustic homing torpedoes. Towed decoy signal generation schemes and their realisation using digital signal processing hardware are outlined in this paper

Breeding and larval rearing of three species of damselfishes (family: Pomacentridae)

The annual world ornamental fish trade is to the tune of around 4.5 billion dollars (1995) with a growth rate of about 8%. Nearly 50% of the revenue from the trade is contributed by marine ornamental fishes. With the spread of scientific knowledge on marine aquarium management and development of an array of aquarium gadgets, there is an Increased demand for tropical marine aquarium fishes in recent years and this opens up the possibility of developing a lucrative marine ornamental fish trade the worldover

Range extension of a Conger eel, Bathymyrus simus Smith, 1965 (Anguilliformes: Congridae) in the Arabian Sea, Western Indian Ocean

Bathymyrus simus Smith, 1965, a thorny-snout conger eel, which was poorly known with few specimens and distributed in Western Pacific Ocean (Vietnam and South China Sea) and Bay of Bengal. The present study deals with a range extension of 3,500 km based on an odd male specimen collected from the Arabian Sea, Western Indian Ocean. The study also provides detailed taxonomic description with insights into their fresh colouration, phylogenetic analysis and its distributional range. Further an updated key to the congeners of the genus Bathymyrus was also provided

An Energy Efficient and Cost Reduction based Hybridization Scheme for Mobile Ad-hoc Networks (MANET) over the Internet of Things (IoT)

Wireless networks are viewed as the best-used network and specifically Portable Specially Appointed Organizations (MANETs) have tracked down numerous applications for its information transmission progressively. The plan issues in this organization are to confine the utilization of energy while communicating data and give security to the hubs. Soa protocol needs to be energy efficient to avoid network failures. Thereby this paper brings an effective energy efficient to optimize LEAR and make it energy efficient. The energy-mindfulness element is added to the LEAR guiding convention in this work using the Binary Particle Swarm Optimization method (BPSO). The recommended method selects programmes taking into account course length in addition to the programme level of energy when predicting the future. To get good results, the steered challenge is first designed using LEAR. The next step is to choose a route that enhances the weighting capability of the study hours and programming power used.This MANET has been secured using the cryptographic method known as AES.According to experimental findings, the proposed hybrid version outperformed other cutting-edge models

Systematic account of scleractinian corals

Coral reefs are ecosystems of high biological productivity. Owing to the rich biological diversity and the services they render, they have been centres of scientific research since many decades. In India, most of the earlier studies on coral diversity and distribution focused on major coral reef areas like the Lakshadweep, Andaman & Nicobar Islands, the Gulf of Mannar, Palk Bay and the Gulf of Kutch. Occurrence of coral reefs along the south-west coast of India was once considered meagre to non-existent; however, recent studies indicated that coral communities are present along this coast. Underwater surveys were carried out off Enayam to Kollam along the south-west coast of India during 2008-2012 and a total of 15 species of stony corals belonging to 6 genera and 5 families were recorded. A detailed systematic account of all the recorded species is given in this chapter

Outcome Of Newborn Hearing Screening Program in A Tertiary Care Centre, South India.

Objective To determine the coverage and outcome of Universal Newborn Hearing Screening (UNHS) Program in Government Medical College Manjeri, South India. To study the prevalence of hearing loss (HL) among those children screened, to describe the characteristics of confirmed cases, and the status of speech and language development acquired by them at follow up. Design Hospital based retro prospective study. Methods Data were collected from all newborns who underwent Universal Newborn Hearing Screening (UNHS) over a four-year period (November 2014 to October 2018). Cases with confirmed hearing loss were studied by pre-structured questionnaire and telephonic interview. Speech and language assessments of 10 confirmed cases were conducted after a period of intervention. Results Out of 17,260 babies, 16,625 were screened (96.3%). HL was confirmed for 13 of these, resulting in a prevalence rate of 0.08%. Risk factors for HL were not present in 61.5% of these cases. Confirmation was done at a median age of 6 months with an Interquartile Range (IQR) (4; 12). Interventions in the form of speech therapy and hearing aid were started at a median age of 17.5 months with an IQR (13;25) and the median duration of intervention till the time of assessment was 30 months with an IQR (17;43) Out of 13, five children were managed with hearing aid. Another five required cochlear implant at a median age of 24 months with an IQR (17.5; 33). All received speech therapy. Three children were lost during follow up. On assessment using ISD and REELS, eight out of the remaining 10 children showed a lag in the speech and language development, with a median delay of 19.3 months with an IQR (2; 34.5) Conclusions Coverage of the program was optimal, with almost all newborns successfully screened. More than half of the confirmed children did not exhibit risk factors for HL and therefore might not have been identified early without UNHS. The observed median age of starting intervention for confirmed cases was higher than the age recommended by AAP guidelines and most of the children had language development below those of typically hearing age mates after months of intervention. Key words: Universal Newborn Hearing Screening, Outcome, Oto Acoustic Emission, Hearing loss, Neonates

Report on the occurrence of Margaretha’s Goatfish, Upeneus margarethae Uiblein & Heemstra, 2010 (Perciformes: Mullidae) from Gulf of Mannar

391-396A single specimen of Goatfish with the standard length of 88.43 mm was collected from the Gulf of Mannar, Southeast coast of India on 28.12.2018. The specimen was confirmed as Upeneus margarethae Uiblein & Heemstra, 2010, based on the morphometric and partial mitochondrial cytochrome oxidase sub-unit I gene analysis. The presence of the species suggests the extended distributional range of U. margarethae in Gulf of Mannar (GoM), Southeast coast of India. Morphomeristic characters of the present specimen are being compared with the earlier records of the species

Report on the occurrence of Margaretha’s Goatfish, Upeneus margarethae Uiblein & Heemstra, 2010 (Perciformes: Mullidae) from Gulf of Mannar

A single specimen of Goatfish with the standard length of 88.43 mm was collected from the Gulf of Mannar, Southeast coast of India on 28.12.2018. The specimen was confirmed as Upeneus margarethae Uiblein & Heemstra, 2010, based on the morphometric and partial mitochondrial cytochrome oxidase sub-unit I gene analysis. The presence of the species suggests the extended distributional range of U. margarethae in Gulf of Mannar (GoM), Southeast coast of India. Morphomeristic characters of the present specimen are being compared with the earlier records of the species