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  • 1
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    Age and growth of Hawaiian seaturtles (Chelonia mydas): an analysis based on skeletochronology (2021)
    In:  http://aquaticcommons.org/id/eprint/15195 | 403 | 2014-05-30 07:14:43 | 15195 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-04
    Description: Skeletochronological data on growth changes in humerus diameter were used to estimate the age of Hawaiian green seaturtles ranging from 28.7 to 96.0 cm straight carapace length. Two age estimation methods, correction factor and spline integration, were compared, giving age estimates ranging from 4.1 to 34.6 and from 3.3 to 49.4 yr, respectively, for the sample data. Mean growth rates of Hawaiian green seaturtles are 4–5 cm/yr in early juveniles, decline to a relatively constant rate of about 2 cm/yr by age 10 yr, then decline again to less than 1 cm/yr as turtles near age 30 yr. On average, age estimates from the two techniques differed by just a few years for juvenile turtles, but by wider margins for mature turtles. The spline-integration method models the curvilinear relationship between humerus diameter and the width of periosteal growth increments within the humerus, and offers several advantages over the correction-factor approach.
    Keywords: Biology ; Chemistry ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 117-127
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  • 2
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    Seasonal variation in chemical composition of the Indian mackerel (Rastrelliger kanagurta) from Karachi Coast (2021)
    In:  http://aquaticcommons.org/id/eprint/22401 | 18721 | 2018-04-05 14:24:35 | 22401 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-04
    Description: The chemical composition variations of the Indian mackerel (Rastrelliger kanagurta) from Karachi coast were investigated seasonally over the period of one year (2004-2005). Moisture, crude protein, fat and ash contents varied from 70.11-74.41%, 16.02- 20.09%, 3.0-12%, and 0.89-1.35% respectively. The seasonal data indicated that the main fatty acids of the total lipid were C16:0, C16:1, C18:0, C18:1, C20:5 and C22:6. Total contents of saturated fatty acid (SFA), monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) percentages varied from 31.6-46.85%, 20.5-27.9%, and 26.8-40.85% respectively. Eicosapentaenoic acid (EPA, C20: 5n-3) and docosahexaenoic acid (DHA, C22: 6n-3) of omega 3 series which have specific importance in nutritional values concept, were the major fatty acids. The lowest EPA and DHA were found to be in July and highest in November to March.
    Keywords: Biology ; Chemistry ; Fisheries ; Chemical composition ; Seasonal variation ; Fatty acid ; Rastrelliger kanagurta ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 67-74
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  • 3
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    Effect of cooking and drying on carbonyls of oil sardine (2021)
    In:  http://aquaticcommons.org/id/eprint/18827 | 12051 | 2015-11-17 21:18:15 | 18827 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-12
    Description: Changes in the total as well as major individual carbonyls of oil sardine during steam cooking, oven drying, sun drying and freeze drying are presented. Carbonyls extracted with hexane were converted to their 2:4 dinitro phenyl hydrazone (DNPH) derivatives and were separated into major classes by column chromatography on celite/magnesia. Individual carbonyls were then identified by capillary gas chromatography of the DNPH derivatives. Dehydration and heating increase the carbonyl production from highly unsaturated fish lipids. The carbonyls produced react with other muscle constituents leading to complex changes. The influence of the mode of dehydration on these different aspects and their net effect on flavour are discussed.
    Keywords: Chemistry ; Fisheries ; quality control ; taste ; Sardinella longiceps ; steam cooking ; oven drying ; freeze drying
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 47-50
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  • 4
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    Evaluation of antioxidant activity of the purified peptides from hydrolysis of rotifer (Brachionus plicatilis) (2021)
    In:  http://aquaticcommons.org/id/eprint/22115 | 18721 | 2018-02-09 01:37:05 | 22115 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-06-26
    Description: Rotifers are an important group of zooplankton in aquatic ecosystems that contain relatively high amounts of unsaturated fatty acids, proteins and peptides. Rotifers, especially Brachionus plicatilis species, are one of the important live food sources for marine fish larvae in aquaculture. The aim of this study was to evaluate the antioxidant activities of purified peptides from B. plicatilis. Antioxidant peptides of the B. plicatilis have been hydrolyzed by Alcalase, α¬Chymotrypsin, Papain, Neutrase, Pepsin, and Trypsin. Their antioxidant activity was evaluated by the free radical inhibitory effect of diphenylpicrylhydrazyl (DPPH). Also the sequential chromatography method was used for extraction and purification of the peptides. The results showed that peptides obtained from the pepsin hydrolysate have a higher inhibitory effect than other peptides. Pepsin showed 58% inhibitory effect in 0.015 mM DPPH. Finally, the pepsin hydrolysate constitutes were purified and isolated by gel-filtration chromatography (Sephadex G-250) and reverse-phase liquid chromatography on Eurospher C18 column (250×4.6 mm), respectively. The results of this study have been recognized the high antioxidant activities of extracted hydrolysate from B. plicatilis and their feasibility of using them in food industries as a food complement.
    Keywords: Biology ; Chemistry ; Rotifers ; DPPH ; antioxidant peptides ; enzyme hydrolysis ; pepsin ; Brachionus plicatilis ; Evaluation ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 69-78
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  • 5
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    A Review of the Aquatic Environmental Fate of Triclopyr and its Major Metabolites (2021)
    In:  http://aquaticcommons.org/id/eprint/1788 | 3 | 2011-09-29 20:03:30 | 1788 | Aquatic Plant Management Society, Inc.
    Details
    Publication Date: 2021-07-10
    Description: The purpose of this paper is to provide an overview of theaquatic environmental fate of triclopyr and its major metabolites,TCP and TMP. This review is primarily based on resultsof laboratory and field studies conducted by various FederalAgencies and the registrant to support the US aquatic registrationfor triclopyr TEA.
    Keywords: Management ; Biology ; Limnology ; Environment ; Chemistry ; Garlon 3A ; Renovate 3 ; metabolite ; toxicology ; aquatic plant control ; herbicide dissipation
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 69-75
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  • 6
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    Effect of preprocessing storage conditions on the carbonyls of oil sardine (2021)
    In:  http://aquaticcommons.org/id/eprint/18826 | 12051 | 2015-11-17 21:14:34 | 18826 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-12
    Description: Changes in the total as well as major individual carbonyls of oil sardine muscle during storage at room temperature for 24 h and in crushed ice up to 6 days are reported. Carbonyls extracted with hexane were converted to their 2:4 dinitrophenyl hydrazone (DNPH) derivatives and were separated into major classes by column chromatography on celite/magnesia. Individual carbonyls were then identified by capillary gas chromatography of these derivatives. Though absolute values for carbonyls exhibited wide variations depending upon the degree of freshness, the pattern of changes in the carbonyls during storage of fish under different conditions gave an insight into the influence of carbonyls on flavour. The significance of the findings is discussed.
    Keywords: Chemistry ; Fisheries ; storage effects ; quality control ; fish storage ; Sardinella longiceps ; processing fishery products
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 43-46
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  • 7
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    Salt tolerance of bacteria isolated from tropical marine fish and prawn (2021)
    In:  http://aquaticcommons.org/id/eprint/18416 | 12051 | 2015-10-23 11:40:47 | 18416 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-09
    Description: Salt tolerance of selected cultures of Pseudomonas, Moraxella, Vibrio, Micrococcus, Acinetobacter and Flavobacteria/ Cytophaga was determined. More than 80% of the cultures belonging to each of the above genera, were capable of growth in presence of 1.5 to 3.5% salt (NaCl) and at least 25 to 30% of the cultures in each group required 1.5 to 3.5% salt for growth. 40% each of Pseudomonas and Vibrio strains and 30% each of Moraxella, Micrococcus and Flavobacteria/Cytophaga strains tolerated 10% salt. Majority of the cultures belonging to the genera Pseudomonas, Vibrio, Moraxella, Micrococcus, Acinetobacter and Flavobacteria/Cytophaga were slightly halophilic (2 to 5% salt tolerant), about 25% especially of Micrococcus spp. moderately halophilic (5 to 20% salt tolerant) and none from Pseudomonas, Vibrio, Moraxella, Acinetobacter and Flavobacteria/Cytophaga spp. extremely halophilic (20 to 32% salt tolerant).
    Keywords: Biology ; Chemistry ; marine environment ; bacteria ; salinity tolerance ; Vibrio ; Cytophaga ; Acinetobacter ; Moraxella ; Pseudomonas ; Micrococcus ; Flavobacteria
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 105-110
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  • 8
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    Carbonyls from some commercially important fishes and shell fishes of tropical waters (2021)
    In:  http://aquaticcommons.org/id/eprint/18541 | 12051 | 2015-11-04 14:53:57 | 18541 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-10
    Description: Results of a preliminary study of the hexane extractable carbonyls from three fish and one shell fish are reported. Volatile carbonyls that can be isolated from oil sardine by distillation at different temperatures in air or nitrogen atmosphere were also studied. Carbonyls were converted to their 2:4 dinitro phenyl hydrozones. These were fractionated by column chromatography and the different fractions were analysed by capillary gas chromatography. The data show wide variations in the content of different carbonyls in different fishes. Carbonyls in distillates from muscle water homogenates of oil sardine showed some differences from the carbonyls extracted with hexane from the same fish. More data is necessary to correlate the carbonyls with the characteristic flavour of each fish.
    Description: Alternative name spelling: Viswanathan Nair, P.G.
    Keywords: Chemistry ; food technology ; volatile compounds ; fish ; shellfish ; taste ; organoleptic properties ; Sardinella longiceps ; food chemistry
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 134-139
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  • 9
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    Application of DNA-based techniques for the identification of whaler sharks (Carcharhinus spp.) caught in protective beach meshing and by recreational fisheries off the coast of New South Wales (2021)
    In:  http://aquaticcommons.org/id/eprint/15179 | 403 | 2014-05-29 07:48:40 | 15179 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-04
    Keywords: Biology ; Chemistry ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 910-914
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  • 10
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    Chemical constituents of the fruit and hypocotyl of mangrove, Ceriops tagal (2021)
    In:  http://aquaticcommons.org/id/eprint/16092 | 12051 | 2019-06-11 14:53:07 | 16092 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-06-27
    Description: The fruit and hypocotyl of Ceriops tagal were analysed for their organic and inorganic constituents. They showed almost similar characteristics in major metabolites and high molecular weight elements. Both the samples had high concentration of the carbohydrates and crude fibre and very low in fat and protein. The ash was rich in NA, K and Ca. Some essential free amino acids and sugars were also present. Calorific values were found fairly high. There is a strong possibility of using fruit and hypocotyl of C. tagal as a source for supplementing animal feed.
    Keywords: Chemistry ; mangroves ; Ceriops tigal ; fruit ; hypocotyl ; chemical constituents
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 119-122
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