Occurrence of young mackerel: Rastrelliger canagurta (Cuvier) off Madras coast

The occurrence of young mackerel, Rastrelliger canagurta (Scomber microlepidotus of Day, 1876) which We have noticed in l arge numbers on 21st and 23rd March and on 20th April 1953 in the shore-seine ca tches on the Madras Coast is worthy of record. It is not uncommon to find young mackerel along the West Coast of India in the months of July to September (Chidambaram et al .. , 1952; Bhimachar and George, 1952; Panikkar, 1952)

A preliminary study of the juvenile fishes of the coastal waters off Madras city

It has generally been observed that in the commercial catches along the Madras coast very young stages of fish occur in enormous numbers during certain months. The present paper deals with the periodicity in the postlarval and juvenile bony fishes obtained from March 1954 to July 1955 collected from the fishing centres at Triphcane North and South, Ayodhyakuppam, Nochikuppam, Santhome, Kanniappanagar and Royapuram. The majority of the species being of great commercial importance, it is hoped that a record of their very young stages, apparently not older than a few months, as judged by their very small size of about few cm. in length, will help in fixing the approximate period of their breeding and in facilitating interpretation of the different size classes, usually obtained in the commercial catches. Further, it is well known that information on the fluctuations in the abundance of post-larvae of any commercial fish is of value in determining the magnitude of the forthcoming fisheries

Spawning periodicity of the ribbon fish, Trichiurus lepturus (F.), with a note on its rate of growth

The spawning periodicity of Trichiurus lepturus is briefly re-examined here in tlie light of certain recent observations. It is seen that this species spawns more than once in a year along the Madras coast and the two seasons are roughly around May-June and later in November-December. This fact also leads to a revision in the interpretation of the rate of growth of the fish. It is now estimated that the fish at the end of one year attains an average of 300 mm in length and that those above about 900 mm are just over four years

Nephroprotective potential of Polyalthia longifolia roots against vancomycin-induced renal toxicity in experimental animals

This study was done to investigate the possible nephroprotective effect of an ethanolic root extract of Polyalthia Longifolia (PL) on vancomycin-induced nephrotoxicity using curative and protective models. Vancomycin (150 mg/kg, intravenous) was given to healthy Wistar albino rats in the curative model before the start of treatment, whereas the protective group received vancomycin at the conclusion of the 10-day treatment procedure. Animals were divided into six groups for both models; group I served as the normal control, while groups II, III, IV, V, and VI were kept as toxic control, standard (selenium, 6 mg/kg), LDPL (low dose of PL 200 mg/kg), HDPL (high dose of PL 400 mg/kg), and HDPL + selenium (interactive) groups, respectively. Renal biomarkers [(uric acid, creatinine, blood urea nitrogen (BUN), serum proteins], and blood electrolyte levels were measured for all tested groups. When compared to the vancomycin group, the HDPL significantly (p < 0.01) showed greater effectiveness in lowering the BUN, potassium, and calcium levels. Additionally, in the curative model, there was a significant (p < 0.05) decrease in the blood levels of uric acid, creatinine, BUN, potassium, and calcium in the animals who received the combination of selenium and HDPL. Both LDPL and HDPL did not provide any distinguishable effect in the protective model, but groups that received HDPL with selenium did provide detectable protection by significantly lowering their levels of uric acid, BUN, serum potassium, and total serum protein in comparison to the vancomycin control group. These findings indicate that, whether administered before or after renal damage is induced, the Polyalthia longifolia root extract provided only modest protection to nephrons, which require selenium support to prevent vancomycin-induced kidney damage

Not Available

Not AvailableIt has generally been observed that in the commercial catches along the Madras coast very young stages of fish occur in enormous numbers during certain months. The present paper deals with the periodicity in the postlarval and juvenile bony fishes obtained from March 1954 to July 1955 collected from the fishing centres at Triphcane North and South, Ayodhyakuppam, Nochikuppam, Santhome, Kanniappanagar and Royapuram. The majority of the species being of great commercial importance, it is hoped that a record of their very young stages, apparently not older than a few months, as judged by their very small size of about few cm. in length, will help in fixing the approximate period of their breeding and in facilitating interpretation of the different size classes, usually obtained in the commercial catches. Further, it is well known that information on the fluctuations in the abundance of post-larvae of any commercial fish is of value in determining the magnitude of the forthcoming fisheries.Not Availabl

Not Available

Not AvailableThe occurrence of young mackerel, Rastrelliger canagurta (Scomber microlepidotus of Day, 1876) which We have noticed in l arge numbers on 21st and 23rd March and on 20th April 1953 in the shore-seine ca tches on the Madras Coast is worthy of record. It is not uncommon to find young mackerel along the West Coast of India in the months of July to September (Chidambaram et al .. , 1952; Bhimachar and George, 1952; Panikkar, 1952).Not Availabl

Not Available

Not AvailableThe spawning periodicity of Trichiurus lepturus is briefly re-examined here in tlie light of certain recent observations. It is seen that this species spawns more than once in a year along the Madras coast and the two seasons are roughly around May-June and later in November-December. This fact also leads to a revision in the interpretation of the rate of growth of the fish. It is now estimated that the fish at the end of one year attains an average of 300 mm in length and that those above about 900 mm are just over four years.Not Availabl

Not Available

Not AvailableThe spawning periodicity of Trichiurus lepturus is briefly re-examined here in tlie light of certain recent observations. It is seen that this species spawns more than once in a year along the Madras coast and the two seasons are roughly around May-June and later in November-December. This fact also leads to a revision in the interpretation of the rate of growth of the fish. It is now estimated that the fish at the end of one year attains an average of 300 mm in length and that those above about 900 mm are just over four years.Not Availabl

Cardioprotective Potential of Garlic Oil and Its Active Constituent, Diallyl Disulphide, in Presence of Carvedilol during Chronic Isoprenaline Injection-Mediated Myocardial Necrosis in Rats

In isoprenaline (ISO)-induced myocardial infarcted rats, garlic oil (GO) and its main ingredient, diallyl disulfide (DADS), were examined for cardioprotective effects when used with carvedilol (CAR). GO, DADS and CAR were given to rats in their respective groups, either alone or together, with the addition of isoprenaline (3 mg/kg/day, subcutaneously) during the last 10 days of treatment. At the end of 14 days of treatment, blood samples were collected, the hearts were excised under anesthesia and weighed. Heart tissue homogenate was used to measure superoxide dismutase (SOD), catalase (CAT), and thiobarbituric acid reactive substances (TBARS). Furthermore, the serum activities of cardiac markers, including lactate dehydrogenase, creatine kinase, and cardiac troponin, were checked. Moreover, inflammatory markers including tumor necrosis factor alpha, interleukin one beta, interleukin six, and kappa bp65 subunit were assessed. Rats that received GO, DADS, and CAR exhibited a significant increase in the cardiac antioxidant enzyme activities with a simultaneous decrease in serum cardiac markers enzymes and inflammatory markers. The TBARS were significantly reduced in rats that received treatment. The addition of carvedilol to GO or DADS significantly elevated antioxidant activities and decreased the release of cardiac enzymes into blood circulation. Both DADS and GOl were almost similar in efficacy, indicating the potential role of DADS in garlic oil-mediated cardioprotection. Combining GO or DADS with CAR increased CAR’s cardioprotective impact and protected rats from developing ISO-induced myocardial infarction