Growth parameters

Transgenic and non transgenic Nicotiana tabacum L (cultivar Wisconsin) containing Ri T-DNA were treated with 0, 0.2 and 0.4 mgL -1 GA 3 in Murashig and Skoog medium. Some physiological parameters including shoot length, leaf area, number of auxiliary bud, fresh and dry weight, number and length of trichomes were measured. Shoot length, fresh weight and dry weight were increased but number of trichome did not change by GA 3 treatment. Chlorophyll, carotenoid and anthocyanin pigments of leaf were decreased. Auxin and gibberellic acid content of leaf and root were also measured. Exogenous GA 3 increased root auxin in the transgenic plants while it did not change in shoot. GA 3 treatment increased gibberellin content in both of root and shoot.

This research was conducted to determine the effect of salicylic acid on the drought tolerance of three pistachio (Pistacia vera L.) rootstocks. The treatments were included three irrigation levels (Control: 100 % ETc, medium stress: 65% ETc, and severe stress: 30% ETc), three pistachio rootstocks, and three salicylic acid concentrations (0, 1, and 3 mM). The salicylic acid solution was once applied as a foliar spray, starting water stress, and irrigation treatments continued for 75 days. Results showed that P. vera ‘Badami Zarand’ was less affected by water stress treatments than the other seedling rootstocks. Among the rootstocks studied, the highest photosynthesis rate (6.55 µmol CO2 m-2 s-1) was obtained in P. vera ‘Badami Zarand’ under severe water stress (30 % ETc) and 1 mM salicylic acid application. The lowest photosynthesis rate (2.75 µmol CO2 m-2 s-1) was observed in P. vera ‘Sarakhs’ under severe water stress (30 % ETc) and 3 mM salicylic acid treatment. In addition, the highest relative water content (66.16%) and the lowest ion leakage (33.29%) were obtained in ‘Badami Zarand.’ The 1 mM salicylic acid application effectively reduced the negative effects of water stress. According to the results, P. vera ‘Badami Zarand’ showed a better response to salicylic acid under stress conditions, and the highest photosynthesis, relative leaf water content, dry weight of organs (leaves, shoots, roots), and the lowest ion leakage under drought stress belonged to this rootstock.

The relationship between compatible solutes (osmolytes) and antioxidants are the strategies that plants have developed to tolerate salt stress. A greenhouse experiment was carried out to study the response of presoaked Sweet Peppers (Capsicum annuum, L.) seeds in freshly prepared ascorbic acid (50 ppm ≈ 0.3 mM ASC) or distilled water (control) for 12 h at natural environmental conditions, to reduce the effect of salinity stress. Generally, the sweet pepper seeds germination occurred after 4 days, while, the germination rate (%) were more faster after soaking the seeds in ascorbic acid compared with control (soaked in distilled water). NaCl salt-stress treatments caused a reduction in all growth parameters (fresh and dry weights of plant, leaf area and number per plant) compared control, particularly at high NaCl level (250 mM) more reduced. In the mean time, ascorbic acid had reduced the effect NaCl salinity stress on all growth parameters. Photosynthetic pigments (chlorophyll a & b and carotenoids) and chloroplast efficiency were increasing with salinity stress, but the response was more pronounced at 250 mM NaCl whether alone or combined with ascorbic acid. Also, salinity stress treatments tended to increased all of the total available carbohydrates (Monosaccharide, Disaccharides & polysaccharides), nitrogenous components (protein, amino acids & proline), antioxidase, (catalase, peroxidase & superoxide dismutases) enzymes activities and inorganic mineral elements (Na + , K + , N +3 , P +3 , Ca +2 , Mg +2 & Cl-) but after soaked the seeds in ascorbic acid, these components tended to increased more. Application of NaCl salinity-stress on tomato plant induced the synthesis of nitrogenous components (protein, amino acids, proline), whereas, the tomato seeds soaked before planting in ascorbic acid which leads to remarkably increasing more for all nitrogenous components, antioxidase, carbohydrates and inorganic mineral elements content.

In this paper, we gathered from the literature: (a) a total of 80 length-length relationships for 20 Greek freshwater fish species and one hybrid; and (b) von Bertalanffy growth parameters for 54 freshwater fish stocks, belonging to 22 species and one hybrid. The relationship between log 10 L ∞ and log 10 K for all stocks, excluding one outlier, was: log 10 K =-1.07·log 10 L ∞ + 0.77 (r 2 =-0.66, n = 53, P < 0.05).

A field experiment was conducted during 2014-15 at Indian
Cardamom Research Institute, Regional Research Station, Spices
Board research farm in Kabi (1567 m amsl) Sikkim. Among the
moisture conservation practices, treatment having trench across
slope duly filled with biomass recorded the significantly higher
number of immature tillers (5.98 & 5.79), mature tillers (4.01 & 5.82)
and vegetative buds (4.00) per large cardamom clump. With respect
to soil moisture content, all the soil moisture conservation practices
significantly improved the soil moisture content over the control at
all the stages of observation. Among the soil moisture conservation
practices, surface mulching recorded significantly higher values of
soil moisture i.e. 21.00, 21.50, 19.60, 17.60 and 21.70 per cent on
30th November 2014, 31st December 2014, 31st January 2015, 28th
February 2015 and 31st March 2015 respectively. Surface mulching
conserved higher soil moisture as compared to the control.

The study was undertaken to know the effects of graded levels of wild sunflower meal (WSM) on the growth and haematological changes in thirty-six (36) weaner rabbits. Six (6) rabbits were placed on each of the 6 dietary treatments containing 0, 5, 10, 15, 20 and 25% wild sunflower meal. The average daily feed intakes for the dietary treatments were 55.86 ± 1.70, 52.77 ± 2.20, 50.42 ± 1.6, 48.33 ± 1.20, 46.29 ± 1.60 and 43.29 ± 1.50, respective. The daily weight gains were 12.64 ± 0.58, 14.80 ± 0.66, 12.04 ± 0.59, 13.06 ± 0.63, 12.90 ± 0.55 and 11.34 ± 0.5g/d for 0, 5, 10, 15, 20 and 25% (WSM) inclusions, respectively. No significant differences were observed amongst all dietary treatments for the growth parameters considered (P>0.05). The blood parameters equally did not show any significant difference (P>0.05) except for RBC values (P>0.05). It is therefore concluded that weaner rabbits can tolerate up to 25% wild sunflower meal (WSM) inclusion in their diets without negatively affecting the growth and haemotological parameters.

Endosulfan, a persistent organochlorine pesticide, is widely used in agriculture, causing negative
effects on non target organisms, especially aquatic biota, including disruption of hormonal systems. However,
the effect of endosulfan on fish fecundity has been hardly studied. The aims of the present study were: to
determine LC of endosulfan, to investigate its propensity to 50 induce oxidative stress, fecundity and
biochemical disturbances in female catfish and to study the protective role of Vitamin E (Vit. E). The results
indicated that LC50 of endosulfan at 96h was 0.89μg/l. The absolute fecundity showed significant
decrease in total ripened egg number (T.R. Egg No.). The activity of acetylcholinesterase (AchE) and the level
of 17ß-Estradiol hormone (E2) were significantly decreased. However, endosulfan induced marked increase in
testosterone hormone (T), glucose and cortisol levels. Moreover, endosulfan exposure was associated with
oxidative damage in liver tissue as evidenced by the increase of lipid peroxidation (LPO), catalase (CAT) and
superoxide dismutase (SOD) levels and the decrease in reduced glutathione (GSH). Vit.E was effective to
alleviate these toxic effects on the studied parameters. It could be concluded that Vit. E has beneficial effects
and was able to antagonize endosulfan toxicity in catfish.
Key words: Organochlorine pesticides, LC50 ,Fish physiology Fish Fecundity

The study aimed to know the effect of cement industry pollutant viz. SPM, RSPM on morphological as well as yield characteristics of groundnut plants grown at different distance from the cement industry at Kodinar, Gujrat, India. The groundnut plant near the industry showed significant deterioration in morphological characteristics. The study indicated that parameters reductions in groundnut correlated directly with particulate pollutant which led to lower yield at more polluted site. Increased concentration of cement dust pollutant causes in visible injuries like progressive decline in photosynthetic ability and closure of leaf stomata and this affect the growth and productivity of the plant.

The main objective of the present study was to analyze and discriminate among nine growth forms (GF) of Haplophyllum tuberculatum collected from six natural sites along the Mediterranean coastal desert of Egypt by applying the phenomenon of allelopathy as a chemical marker. H. tuberculatum aqueous extracts (HTAE) were tested on germination efficiency and growth parameters of Lepidium sativum and Raphanus sativus seeds. At the full-strength concentration (100%) the highest effect on the germination (GP) and inhibition (IP) percentages, the time taken for 50% germination (T50), mean germination time (MGT), germination energy (GE) and seed germination index (SGI) was exhibited by GF3 and GF5 on Lepidium sativum and Raphanus sativus seeds, respectively. The hypocotyl length (HL) was more sensitive than radicle length under HTAE. It was obvious that the allelopathic effect was prominent in L. sativum compared with R. sativus indicating the resistance of the latter to the allelochemicals extracted from HTAE. The study indicated that germination bioassay differentiated among three different growth forms (GF3, GF5 and the rest of the studied growth forms) which may need further studies using more highly specific techniques for separation and isolation of different allelochemicals.

Moringa seeds were cultivated in polyethylene bags (1 kg capacity) filled with clay loamy soil. Bags were treated with microorganisms using three methods of inoculation i.e. soil inoculation (single or mixed cultures); leaf inoculation (single culture), and soil and leaf inoculation (mixed inoculation). Plants were harvested after 3 months of cultivation. Shoot and root lengths, shoot and root dry weights, leaves fresh and dry weights, vitamin C g/g fresh leaf, protein g/g leaves dry weight and mineral contents (Mg, P, K, Zn, Mn, Fe and Cu) were recorded. Biofertilization by different inoculation methods increased most of the parameters tested. The highest records of shoot and root lengths, and shoot and root dry weights were obtained with soil inoculation with mixed cultures of (Azotobacter chroococcum and Saccharomyces cerevisiae) and (Azot. chroococcum and Bacillus circulans). The same trend in respect of Vitamin C was obtained. But, the highest protein contents (g/g dry weight leaves) were obtained with soil inoculation with (Azot. chroococcum and B. circulans), (Bacillus megatherium) and (Azot. chroococcum and S. cerevisiae), which gave 0.73, 0.59 and 0.58 g protein/g leaves dry weight respectively. Generally, soil inoculation with either B. megatherium, B. circulans, (Azot. chroococcum and Pseudomonas fluorescens), (Azot. chroococcum and B. circulans), Azot. chroococcum, and (Azospirillum brazilense and B. megatherium) gave the highest records of Mg, P, K, Zn, Mn, Fe and Cu respectively. ª 2012 Faculty of Agriculture, Ain Shams University. Production and hosting by Elsevier B.V. All rights reserved. *

A field experiment consisting of seven treatments (Oats sole + RDF, Chinese Cabbage sole + RDF, Oats + Chinese Cabbage (1:1) + RDF, Oats + Chinese Cabbage (2:1) + RDF, Oats + Chinese Cabbage (1:2) + RDF, Oats + Chinese Cabbage (2:1) + 75% RDF+ FYM+ PGPR, Oats + Chinese Cabbage (1:2) + 75% RDF + FYM+ PGPR) was conducted during rabi season, 2020 to study the effect of nutrient management on the growth and yield of the fodder oats and chinese cabbage in intercropping. The experiment was laid out in Randomized Block Design with three replications. The growth parameters of oats like plant height, number of leaves per tiller and leaf length were recorded highest in "Oats + Chinese cabbage (2:1) + 75% RDF + FYM +PGPR". Total green and dry fodder yield were also recorded highest in the "Oats + Chinese cabbage (2:1) + 75% RDF + FYM +PGPR".

Response variation for salt tolerance was assessed in two Zea mays L. cultivars; Giza 2 (salt tolerant) and Hybrid triple 314 (salt sensitive) amended in presence of Rhizobium radiobacter strain (HQ 395610-Egypt) under two N fertilization regimes (75% and 100%). Soil samples tested for enzymatic activities revealed that R. radiobacter inoculation increased nitrogenase and hydrolases activities particularly after 90 and 45 days. The leaf sample analyzed for inorganic osmolytes (potassium and sodium) showed that both cultivars had high K/Na ratio when treated with R. radiobacter, while total chlorophyll, soluble sugars and peroxidase activity increased. Proline stress-response was also reduced by R. radiobacter inoculation. Substantial variations were observed in the grain quality and yield for both cultivars due to the different treatments. The grain yield increased by 71% in cv. Giza and 48% in cv. Hybrid when R. radiobacter treatment was combined with full N fertilization level. [Lobna A. Moussa, Mohy E.A. and El Banna Ib.M. Zea Mays Cultivar Behavior as Affected by Rhizobium Radiobacter Inoculation in Salt-Stressed Environments.

Current study investigated the impact of greenhouse on selected water quality and growth parameters of Nile tilapia. Fingerlings were cultured and uniformly fed on isonitrogenous diet for six months in greenhouse and open ponds. At the end of experiment, Greenhouse pond had significantly higher temperatures than open pond. Mean dissolved Oxygen, pH and conductivity in the two ponds compared insignificantly. The concentrations of ammonium and Nitrate were higher in the greenhouse pond while Nitrites, soluble reactive phosphorus and total phosphorus in two ponds compared insignificantly. Final weight, Specific and Absolute growth rates and condition factor of Nile tilapia in greenhouse pond were significantly higher compared to open pond. This study recommends adoption of greenhouses in Nile tilapia aquaculture in high altitude areas. Current findings will be useful to aquaculture practitioners aiming to improve Nile tilapia performance and other warm water fish species in high altitude areas characterized by low temperatures.

The present experiment designed to evaluate the response growth characteristics of two soybean cultivars (032 and BP) to cold stress (5 °C) at two light intensity levels [normal (8000 lux) or low light (2000 lux) intensity]. Treatments were arranged in a factorial experiment based completely randomized design with three replicates under controlled conditions. The results showed that root volume and nodule number of root in soybean seedlings significantly decreased (38 and 32 %, respectively) when grown at cold stress as compared to those
grown under control conditions. Cold stress, also, reduced leaf and root fresh and dry weights and shoot dry weight in both light intensities, however, this effect was more noticeable at low light intensity for root dry weight (53%) and at normal light intensity for leaf and shoot fresh and dry weights (47% ). Cold stress, also, significantly suppressed stem fresh weight in both cultivars (34% in 032 and 27% in BP). BP cultivar when
grown at 8000 lux had nearly 16% lower leaf dry weight than plants grown at, 2000 lux. However, 032 cultivar in normal light intensity showed no significant response in growth parameters to low light intensity. In both light intensities, cold stress significantly reduced the root fresh and dry weights. Although two soybean cultivars showed slightly contrast behaviors, the rate of cold stress damages decreased when soybean plants grown under lower light intensity.

— A field study was carried out to at Agriculture Research Institute, Sindh Agriculture University Tandojam, to investigate the effect of various nitrogen levels on growth and yield contributing traits of two wheat varieties. Wheat varieties Benazir and TJ-83 were evaluated against four nitrogen levels (0, 90, 120 and 150 kg ha-1).The results revealed that the effect of nitrogen levels as well as varieties differed significantly for all the growth and yield contributing traits and N @ 150 kg ha-1 resulted in maximum values for plant height (87.66 cm), number of tillers m-2 (265.17), spike length (13.05 cm), number of spikelets spike-1 (22.02), number of grain spike-1 (68.21), seed index (48.80 g) and grain yield (4320 kg ha-1). In varieties, Benazir showed its superiority over its companion variety with 82.91 cm plant height, 224.17 tillers m-2 , 10.52 cm spike length, 18.21 spikelets spike-1 , 53.00 grains spike-1 , 45.29 g seed index and 3649.50 kg ha-1 grain yield. The commercial variety TJ-83 ranked 2 nd with 78.33 cm plant height, 207.75 tillers m-2 , 11.42 cm spike length, 19.82 spikelets spike-1 , 57.31 grains spike-1 , 40.98 g seed index and 3143.20 kg ha-1 grain yield. It was observed that treatment interaction N @150 kg × variety Benazir proved to be effective treatment and variety combination for achieving higher wheat yields; while, variety Benazir showed its genetic superiority yielding higher than its companion variety TJ-83.

This is the first detailed study on the age and growth of the Argentine hake Merluccius hubbsi in Brazilian waters. A total of 3,651 specimens obtained from surveys and sampling landings using trawlers and long-lines in the South-Southeast Region (21°S to 34°S) between 1996 and 2001 were analyzed. Readings of sliced and burned otoliths were conducted on 686 individuals (397 females, 129 males and 160 young -sex not identified), identifying opaque and translucent zones. Marginal increment and edge type percentage methods were used for validation, resulting in one ring per year, formed during summer-autumn. Fish with no more than eight rings and six years of age were found, the two first rings after the core being formed during the first year. Back-calculation methods were applied to length/age data and the parameters of von Bertalanffy's growth model were fitted based on average length per ring. The value of maximum theoretical length varied between 470.27 mm and 807.40 mm; growth coefficient varied from 0.1657 to 0.3555 year -1 and the theoretical age at length zero between -1.2846 and -0.4552 years. Growth of females and males differed significantly. The techniques applied and the results obtained are discussed and compared with studies on hake conducted in Uruguay and Argentina, providing important information for the management of the species in Brazil, where it presents clear signs of overexploitation.

Monocropping of rice is practiced in Assam (situated at north east part of India) throughout the year in different agro-ecosystems (upland and lowland) primarily under rainfed conditions. The estimation of methane emission has been realized investigating high yielding rice varieties viz. Ranjit and Mahsuri, grown under two different agro-ecosystems at Lower Brahmaputra Valley Zone of Assam with sandy to sandy loam type of soil. Variety 'Ranjit' grown at monsoon (Sali) rice ecosystem at lowland rainfed condition showed higher seasonal integrated methane flux value compared to variety 'Mahsuri' grown at pre monsoon (Ahu) rice ecosystem. Both varieties showed two methane peaks, one at the active tillering stage and the second at the reproductive stage of the crop. The observed variation in methane emission peaks are contributed mainly by physiological characteristics of the rice plant such as leaf numbers, tiller numbers, plant height, root shoot biomass and leaf area index. Statistical analysis of these parameters showed a positive correlation with methane emission. These physiological parameters are in turn governed by plant genotypes and environment i.e., the field water availability and climatological factors (rainfall and temperature) during the growing season. While comparing the two ecosystems it was found that methane emission is significantly less from upland rainfed rice ecosystem and this ecosystem can be considered a suitable option for biological mitigation of methane from rice paddies.

Tocopherols, identified as vitamin E, are amphipathic molecules known as antioxidant & able to remove ROS in lipophilic conditions. In this study, tobacco plants were cultured on MS medium containing concentrations of 0, 100, 200 mM NaCl supplemented with 0, 100, 200 & 400 mg.L ˉ1 α-tocopherol for 4 weeks. Then growth parameters including fresh & dry weight, photosynthetic pigments including chlorophyll a, b, total chlorophyll & carotenoids, sodium & potassium, proline, total phenol, soluble sugar, anthocyanins, & total protein were measured. The results showed that, increasing of α-tocopherolconcentrations increased fresh & dry weight of plants & the amount of photosynthetic pigments, proline, soluble sugar, total phenol, anthocyanins & potassium while, amount of sodium was decreased significantly.Protein content increased by the highest concentration of α-tocopherol. It seemed that, treatment with vitamin E by changing physiological parameters increased salt tolerance of tobacco plant.

Medicinal plants in developing countries are used as a formational basis for the maintenance of good health, whereas in developed countries they are used for the extracts, development of several drugs, cosmetic purpose, therapeutics and fragrance industries. This study is to investigate the effect of integrated plant nutrition system on selected medicinal plant-Tulsi on morphological characters of the plants such as height of the plant, number of nodes, number of leaves, number of branches, intermodal length, length and breadth of leaves, root and shoot ratio by the sole and combined application of organic, inorganic and biofertilizers. Plant height obtained highest in treatment 8 as 78.3cm in Tulsi. The results are significant by having the best performing treatments in (T8-Combined use of Organic, Inorganic and Biofertilizer) has the best treatments and (T1-Control) has the poorest performing treatments.

Automatic detection and classification of objects is an important functionality of image analysis. Due to the nature and size of objects and the varied visual features, it becomes challenging to detect and classify objects in aerial images. Manual detection of objects in these images is very time consuming due to the nature and that data captured in these images. It is desirable to automate the detection of various features or objects from these images. The conventional methods for object classification involve two stages: (i) Identify the regions with object presence in the image and (ii) Classify the objects in the regions. Additionally, detection of objects becomes challenging in presence of complexities in background, size, noise, and distance parameters. This work proposes a customized YOLO to detect and classify different objects such as garbage waste, plastic waste and vehicles in the images. I.

Three hundred sixty juveniles were randomly distributed into 4 treatments each with three replicates and reared in 300 liter tanks for 2 month. Three experimental treatments were fed with stevia supplemented diet at different concentration (100, 2000 and 3000 ppm) and and control group were feed with non –supplemented diets . At the end of treatments following growth parameters: condition factor, specific growth rate, relative growth rate, weight gain, length gain, food conversion ratio ,protein efficiency ratio were measured . Chemical properties of fillet including the amount of fat, crude protein, fiber, carbohydrate, ash and moisture were measured before and at the end of treatment. Results show that there was significant effect on all studied parameters such as weight gain(21.15±3.775 g) relative growth rate(0.211±0.037%),specific growth rate(1.540±0.182%) among fish fed with stevia supplemented diet at 2000 ppm and that of the control(p<0.05). According to the chemical properties, significant difference was observed between all experimental groups and control group(p<0.05). Results show that there was no significant effect on the amount of ash among fish fed with stevia supplemented foods and that of the control (p>0.05). Based on the results of this study, incorporating stevia extract at concentration of 2000ppm had a significant effect on enhancing growth parameters and chemical properties of common carp.

Two hundred and forty slow–growing chickens consisting of equal numbers of Hubbard S757 (S757) and Hubbard Grey Barred JA (GB–JA) strains were utilized for the investigation in organics system and were used to estimate growth curve in Gompertz and Logistic model. The asymptotic weights for GB–JA and S757 genotype female; male in the Gompertz model were estimated 3725.34 g; 6109.60 g and 4876.10 g; 6496.47 g and same parameter were found in Logistic model 2133.33 g; 2906.35 g and 2790.37 g; 3635.00 g respectively. The Gompertz model was higher estimate than Logistic model for the asymptotic weights parameter. The instantaneous growth rate for GB–JA and S757 genotype female; male in the Gompertz model were estimated 0.1424; 0.1288 and 0.1525; 0.1495 and same parameter values were found in Logistic model 0.3753; 0.3734 and 0.3873; 0.3949 respectively. Significant difference was observed for the instantaneous growth rate parameter between GB–JA and S757 genotypes in each of models. Acco...

• Seeds of Andrographis paniculata, Barleria prionitis and Rhinacanthus polonnaruwensis are orthodox and do not need special conditions for long term storage. • Seeds of R. polonnaruwensis do not have dormancy while B. prionitis and A. paniculata have non-deep physiological dormancy. • Sand: garden soil potting medium can be recommended as a potential potting medium for these three species.

A field experiment was conducted at Regional Agricultural Research Station, Bijapur on medium deep black soil during rabi seasons of 2004 and 2005 to study the influence of different rabi intercrops on growth and productivity of senna. The treatment consists of five rabi crops (chickpea, safflower, linseed, mustard and wheat) and senna in sole stand as well as intercropping system and safflower + chickpea (2:4) intercropping system as a check. The sole crop of senna recorded significantly better growth and growth parameters as compared to intercropped senna. The leaf and pod yield of senna also followed the same trend as that of growth and growth parameters with different rabi intercrops. Growing of senna with safflower adversely reduced the growth and growth parameters, leaf and pod yield as compared to chickpea, linseed, mustard and wheat.

A field experiment was conducted at Regional Agricultural Research Station, Bijapur on medium deep black soil during rabi seasons of 2004 and 2005 to study the influence of different rabi intercrops on growth and productivity of senna. The treatment consists of five rabi crops (chickpea, safflower, linseed, mustard and wheat) and senna in sole stand as well as intercropping system and safflower + chickpea (2:4) intercropping system as a check. The sole crop of senna recorded significantly better growth and growth parameters as compared to intercropped senna. The leaf and pod yield of senna also followed the same trend as that of growth and growth parameters with different rabi intercrops. Growing of senna with safflower adversely reduced the growth and growth parameters, leaf and pod yield as compared to chickpea, linseed, mustard and wheat.

Whitespotted rabbitish, S. canaliculatus is the dominant species in the catches of siganids of Oman. In recent years, the fishing pressure on the stock of S. canaliculatus has increased considerably. No information on the stock parameters of the fish is available, the present study has conducted for sustainable harvest of the stock. The size of fish in commercial catches ranged between 15 and 38 cm of total length (TL). The VBG parameters estimated were: L∞ = 40.13 cm, K = 0.85 y -1 and t 0 = -0.086 y. The life span of fish was around 3.5 years and commercial catch was mainly constituted by individuals of 1-2 years of age. The estimated annual Z, M and F coefficients were 2.66, 1.36 and 1.3 respectively. The E, U and M/K ratios were 0.49, 0.46 and 1.6 respectively. The growth performance index of 3.14 indicated the faster growth of the fish. The MSY calculated varied from 519 t to 618 t. While, the estimated average standing stock was 390 t, the total stock was 1,102 t. At the F equal to 1.0, the stock biomass decreased to 723 t. The Yw/R for the current F was estimated at 62.5 g. The study indicates that the present effort for the fishery of S. canaliculatus is optimum. Any alteration in the existing fishing pattern or increase of effort would affect recruitment and reduce MSY.