Heavy landings of bigeye and pinjalo snappers at Chennai Fisheries Harbour

Among the major perches landed at Chennai Fisheries Harbour, snappers and rock cods formed dominant groups followed by pigface breams. Among snappers, more than 15 species were recorded at Chennai Fisheries Harbour during 2009 (Table 1). In trawlnet, Lutjanus lutjanus (29.9%) formed the dominant catch followed by L. rivulatus and L. malabaricus. In mechanised gillnet, L. rivulatus (33.7%) formed the major catch followed by L. malabaricus and Pinjalo pinjalo. In hooks and line, L. rivulatus (34.4%) formed the major catch followed by L. lutjanus, L. malabaricus and L. argentimaculatus. The other lutjanids landed were Aphareus rutilans, Aprion virescens and Pristipomoides filamentosus. Lutjanus lutjanus was landed throughout the year by trawl nets. Unusually heavy catch of big eye snapper (L. lutjanus) was landed, about 8.5 t, 3.2 t, and 2 t by multiday thangal trawlers during July, August and September, 2009, respectivel

Indigenous trawl operations during fishing ban period in Chennai

North Chennai is a major centre for mechanised fishing with approximately 1200 fishing units. Generally during the fishing ban period, the fishermen from these units either sit idle or enroll as labourers for fishing in permitted traditional fishing units. But during the mechanised fishing ban period in 2017, some of the fishers in North Chennai started mini trawl operations to tide over their lean period. The size of the trawl net was 15 m in length and cod end mesh size of 24 mm

Unusual landings of deepwater bandfish along Chennai coast

Large volumes of Acanthocepola Bleeker, 1874 landing by mechanized single day trawlers and motorized fibre glass boats were observed at Chennai Fisheries Harbour and Kovalam Landing Centre in Chennai respectively during the month of August and September, 2019. In single day mechanised trawlers operated in 12km north off Chennai at a depth of 18m total landings between 6th and 13th August,2019 were an estimated 1200 kg. The size range was 270-470mm with dominant mode at 340-360mm. The individual fish weight ranged between 57-112g with a mean weight of 78g

Unusual heavy landing of billfishes at Chennai

Billfishes are regularly landed by mechanised gillnets and hooks and line at Chennai Fisheries Harbour. An estimated catch of 65 t, 80 t, and 60 t of billfishes were landed by mechanised gillnets during July, August and September 2010 respectively. On 24.06.2010, about 5 t of billfishes were landed unusually by mechanised gillnets operated at a depth of 50-60 m in the north-east direction

First record of the chimaeroid, Rhinochimaera atlantica at Kasimedu Fisheries Harbour, Chennai

Bumper landings of skipjack tuna, Katsuwonus pelamis was observed at Visakhapatnam Fishing Harbour on 28th October 2011, wherein about 42 t were landed by hooks and line

Heavy landing of tomato hind Cephalopholis sonnerati (Valenciennes, 1828) at Chennai

Heavy landing of the tomato hind, Cephalopholis sonnerati (Valenciennes, 1828), locally called ‘thakkali kalava’ or ‘sivappu kalava’ (Fig.1), was recorded at Chennai Kasimedu Fisheries Harbour in July 2008 and August 2009

Occurrence of a bisexual strain of the Brine shrimp Artemia

The importance of the brine shrimp, Artemia in larviculture was recognised for the first time when Scale (1933, Trans. Am. Fish. Soc.. 63 : 129-130) described the value of the nauplii of Artemia as an ideal food for fish fry. Later several investigators found that the freshly hatched nauplii of the brine shrimp are the most suitable and also very convenient food for the early larval stages of various species of fishes and crustaceans

Devil ray Manta birostris landed at Chennai Fishing Harbour

Female devil ray Manta birostris measuring 5.2 m in width, 2.1 m in length, weighing 1050 kg. was landed at Chennai fishing harbour by a mechanised gill net. The devil ray has been reported on 23 occasions along the Indian coast. The landings were mainly during March and April. The devil rays M. birostris were caught mainly by gill net. Maximum number was landed at Tuticorin

Effect Of 12 Weeks Yoga Training And 12 Weeks Detraining on Blood Pressure Subjects with Hypertension

Background: Hypertension, an early predictor of cardiovascular disease can be prevented by healthy lifestyle modification. Stress-induced disorders such as hypertension can be effectively managed with the holistic science of yoga. Objective: In hypertensive individuals who are receiving routine treatment, we investigated the effects of yoga training for 12 weeks and compare as well as analyze these parameters at the end of yoga training (12th week) and after 12 weeks of follow-up with hypertensive on regular treatment (non-yoga group). Materials and methods: The study involved randomly assigned 124 hypertensive subjects to either experimental or control groups where N=65, and the yoga groups where n=61 between age of 25 to 45 years were included. In both the yoga group and the control group, heart rates (HR), Systolic Blood Pressures (SBP), Diastolic Blood Pressures (DBP), Pulse Pressures (PP), Mean Arterial Pressures (MAPs), and mean arterial pressure products were recorded before, after, and during the study period. Results: The means of RPP, HR, PP, SBP, MAP and DBP of pre-post, and follow-up values of the control group were compared by RM ANOVA and also there was no significant difference were found that exists among the groups. The mean values in the test group of post-training and follow-up show a significant decrease when compared with pre-training values. There are a significant decrease in test group follow-up values and post-training compared with follow-up values of control group and post-training respectively. In test group follow-up values the significant increase is found when compared with the test group post-training. Conclusion: Yoga reduced HR, SBP, DBP, PP, MAP, and RPP in essential hypertension under resting conditions. Reduced Sympathetic Activity, Enhanced Vagal Modulation and the increased sensitivity of baroreflex might be responsible for the harmonization of autonomic cardiovascular rhythms. Detraining from yoga, on the other hand, did not result in an increase in blood pressure. In conclusion, the present study shows that regular practice in yoga is helpful in reducing the hypertension, and that deep rest keeps the body healthy.

Effect Of 12 Weeks Yoga Training And 12 Weeks Detraining on Heart Rate Variability on Subjects with Hypertension

Background: Healthy lifestyle modifications can prevent hypertension, an early predictor of cardiovascular disease. Yoga is an effective way to manage stress-induced disorders, such as hypertension. Objective: This study investigated the effects of yoga training on hypertensive individuals receiving routine treatment over a 12-week period, comparing and analyzing heart rate variability (HRV) parameters at and after the 12-week yoga training period (the 12th week) with hypertensives receiving routine treatment (the non-yoga group). Materials and methods: A total of 132 hypertensive subjects between the ages of 25 and 45 were randomly assigned to control or experimental groups (N=66), and 66 of these subjects were exposed to yoga therapy (N=66). Before, after, and during the study period, HRV parameters were obtained. Results: RM ANOVA was used to compare time domain and frequency domain parameters of HRV of the control group at pre, post, and detrain, and it was found that no significant difference existed between the groups. Test group mean values show a significant increase in time domain parameters compared with pre-training values after training. Test group post-training and detrain values significantly increased when compared to control group post-training and detrain values. Test group detrain values decreased significantly from post-training to test group detrain values. Conclusion: Yoga therapy increases the HRV values in essential hypertension at rest. An increase in vagal modulation, a reduction in sympathetic activity, and an increase in baroreflex sensitivity may be responsible for the harmonization of autonomic cardiovascular rhythms. The results of detraining from yoga did not result in an increase in HRV. As a result, the present study shows that regular yoga practice reduces hypertension, and deep rest keeps the body healthy.