acanthopagrus latus

In this study changes chemical compounds and textural, color and sensory properties were measured to investigate the shelf-life of the whole, gutted and filleted yellow fin Seabream (Acanthopagrus latus) in modified atmosphere packaging (MAP) (45% CO2, 50% N2 and 5% O2) during frozen condition in 4 months storage. Results showed that no significant different in protein, ash and moisture contents were observed (p> 0.05). The lowest fat content (2.67 % ± 0.1%) was observed in sample containing the whole fish (p< 0.05). In all treatments the WHC was showed a significant decrease during storage time (p< 0.05) and the lowest value was found in gutted and filleted samples (22.1 % ± 0.39 and 22.34 % ± 0.34%, respectively). The results also showed a significant decrease in textural properties (including hardness, resilience, cohesiveness, gumminess and chewiness) compared with initial values (p< 0.05). However, the lowest values of these factors were found in whole fish samples. Evaluation of the color showed a significant increase in factor b* as well as decrease in factors a* and L* during storage. The results in all treatments revealed a significant decrease in sensory factors; however gutted and filleted fish in MAP packaging were judged to be more acceptable than whole fish samples. Considering of textural, color and sensory properties, it seems that filleting and gutting fish compared with whole fish samples resulted in better quality in MAP packing under frozen storage.

One hundred and eight yellow-fin seabream (Acanthopagrus latus) with approximate weight 110±20g, adapted to salinity 20 ppt for 14 days, then challenged suddenly to salinity 5 ppt, 12 ppt, 34 ppt and kept in these salinities for 7 days. Gill samples were taken at 0, 24, 48 hours and 7 day after transfer. At time 0 structure of gill was normal and no changes were recorded in distribution of gill constitutes. Area of chloride cell increased in all groups after salinity challenge, but after one week at 12 and 34 ppt salinity, area of chloride cell decreased. Gill microscopic structure was normal and no changes was recorded in arrangement of the gill components. Size of chloride cell showed increase in fish kept in changed salinities, but decreased in 12 and 34 ppt groups after one week. Some changes including hypertrophy and hyperplasia of gill epithelium, lifting the gill epithelium, hypertrophy of chloride cells, changes in chloride cells area, adhesion Lamella and had an aneurysm were recorded in all groups. Our findings showed that some structural changes was seen in gills of A. latus to be compatible with different salinities

The present study was investigated the effect of starvation and L- carnitine supplementation on biochemical (plasma total protein, glucose, cholesterol, triglyceride and liver glycogen) and non- specific immune (plasma lysozyme activity) parameters in yellowfin seabream. In this study, a number of 240 fish with mean 3.23± 0.46 g were randomly fell into four groups (three replicates, n=20) in 60- L plastic tanks. Two groups were fed in daily manner and the other two ones were kept starved for 7 days once in 2 weeks. Two groups of feeding regimes were fed with L- carnitine free basal diet and the other were fed with 800 mg L- carnitine kg-1 diet. Cyclic fasting led to significantly decreased plasma total protein, cholesterol, glucose and significantly increased plasma triglyceride, liver glycogen and plasma lysozyme activity, whereas in both the feeding regimes, no significant difference was detected in plasma glucose, liver glycogen and plasma lysozyme activity of fish fed with 800 mg L- carnitine kg-1 diet. No significant differences were observed in biochemical and immunological parameters under combined cyclic fasting and L- carnitine supplementation. The supplemented L- carnitine diet significantly decreased plasma cholesterol and triglyceride (P

Both in nature and aquaculture, fishes could experience periods of food deprivation or starvation. The present study was investigated the effect of starvation on biochemical (plasma total protein, glucose, cholesterol, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) and haematological (haematocrit, haemoglobin, mean corpuscular volume (MCV), mean corpuscular haemoglobin concentrations (MCHC), mean corpuscular haemoglobin (MCH), red blood counts (RBCs) and white blood counts (WBCs) parameters in two different sizes of yellow fin seabream. In this study, a total of 120 fish with mean length 8.05± 0.98 cm and 7.46± 1.07 g (was referred as size A) and 120 fish with mean length 11.05± 0.86 cm and weight 18.01± 3.07 g (was referred size B) were divided into fed and starved groups each with three replicates (20 fish per replicate) and maintained in a 60- L plastic tanks. Sampling of fish was performed at 10, 20 and 30 days of food deprivation. The results showed that in starved group of size A, plasma total protein, glucose and cholesterol significantly decreased and WBCs significantly increased (P

In this study، effects of BPA on erythrocytic nuclear abnormalities (ENA) stimulus (MN Test) and liver DNA integrity (DNA Unwinding Assay)، in male yellowfin seabream (Acanthopagrus latus) were investigated. For this reason، fish received intraperitoneal injections during a period of 2 weeks with 10، 50، 100 and 150 µg g-1 week-1 of BPA dissolved in coconut oil. Solvent controls received the coconut oil whereas controls were not injected. The fish were sampled on day 0، 7 and 14. In order to evaluate cytotoxicity of BPA presented in blood، the erythrocytic nuclear abnormalities (ENA) frequency in yellowfin seabrem was determined. Our results demonstrated a significant increase in fish micronuclei frequency after the treatment with bisphenol A in comparison to the control groups and in dose dependent manner. In addition، the rate of liver DNA integrity was tested using the DNA alkaline unwinding assay. Results showed a decrease in the rate of liver DNA integrity in treated fishes after 7 and 14 days of BPA exposure in comparison to the control group. In conclusion، results of the current project indicated that BPA has high genotoxic and/or cytogenotoxic potential. It could be concluded that Micronucleus test and DNA strand breaks can be used as sensitive cellular and molecular indicators of exposure to genotoxic BPA.

The growth and mortality parameters as well as exploitation rate were estimated for Yellowfin seabream، (Acanthopagrus latus Houttuyn، 1782) from the specimens collected in Bandar Abbas، Lengeh and Qeshm fishing bay، Iran from July to June 2011. In order to do this، length frequencies distribution were analyzed using the ELEFAN I routine and Pauly’s practical approach from the FISAT II program. The forked length (FL) of the captured fishes ranged from 15 to 41 cm with an average of 25. 56 cm. The mixed sexed growth parameters were estimated to be L∞=43. 5; k=0. 29 yr-1; year t0=-0. 52. Total mortality (Z)، natural mortality (M)، and fishing mortality (F) were calculated at 1. 16 yr-1، 0. 69 yr-1، and 0. 47 yr-1 respectively while exploitation rate was 0. 41. Using obtained total weight (W) data، the relationship between total weight and forked length was described: W=0. 0379 SL2. 86. It could be speculated that Yellowfin seabream exhibit isometric growth in the area. In this research، MCY is estimated about

The crude protein content and amino acid compositions of muscle from wild and cultured of male and female Acanthopagrus latus were determined by HPLC. There were quantitative differences between individual amino acids in the tissues investigated, depending on the sex and location. It was noted that, among all the samples studied in tissues, sexes and locations, lysine and isoleucine were the principal essential amino acid (EAA) and glutamic acid was mainly for non-essential amino acid (NEAA). Lysine and isoleucine of male muscles had a significantly higher (P<0.05) amount than female muscles. The crude protein content in male and female muscles was not found to be significantly different. Depending on location, the percentages of arginine, leucine, isoleucine, lysine, serine, glycine, alanine and tyrosine were significantly different (P<0.05) in muscles of wild and cultured fish. The wild seabream possessed considerably higher protein content than cultured seabream muscle. The results showed that wild male fish muscle contained a higher (P>0.05) level of EAA than other groups. The results indicate that the Acanthopagrus latus is a healthful component of the human diet.

A feeding trial was carried out where, three protein concentrations [45%, 55% and 65%) crude protein (CP)] and three dietary energy concentrations [20, 22and 24 kj g-1 crude energy (CE)] were fed to 540 yellowfin seabreams (Acanthopagrus latus) fingerlings to establish the protein and energy requirement for this species. 9 treatments with triplicate groups of 20 fish each (initial weight 12g) were stocked in 300-L fiberglass tanks and fed twice a day to apparent satiation. After 8 weeks, the survival rate was not dependent on the dietary treatments, but average fish weight gain (AWG), specific growth rate (SGR) and feed efficiency ratio (FER) were significantly affected by dietary protein (P<0.05). Protein retention (PR) were increased by dietary energy level (P<0.05). Feed efficiency ratio, PER and Hepatosomatic Index (HIS) was not affected by dietary protein and energy concentrations (P>0.05). At same protein level, PER, PR increased with the increase in energy levels from 20 to24 Kj g-1. Carcass moisture and ash contents were significantly affected by dietary protein and energy levels (P<0.05) but carcass protein was not significantly affected by dietary protein and dietary energy levels (P>0.05). With increase dietary energy, carcass fat content was increased from 20 to 24 Kj g-1. The results indicate that the optimum dietary protein and energy levels for growth of juvenile yellowfin seabream are 56. 20 – 57. 47g in Kg-1diet and 21.9-24.56Kj in gr diet and 23.15-25.95mgr kg-1, respectively.