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  • Storage  (2)
  • Aquaculture  (1)
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  • 1
    Publikationsdatum: 2021-05-19
    Beschreibung: Every year, after fishing period, the sturgeon gillnets are assessed base on physical characters by the management of sturgeon fishes in Golestan Province. Net are put aside and replaced by new one if they qualification are not net. In spite of importance of strength ropes, unfortunately, there is a little research in this regards. In addition, previous research are not applied storage conditions and physical damages. Therefore, researcher are determined to do a research in this regards. For this reason some materials from new net, storage net, damaged net, put aside net, etc. collected and tested by an Instron. Then data analyzed by factorial test in complete randomized and variance and average compared in 5% significant level by SPSS version 17. The results shows that there is not significant difference between new net (blank) and new net kept in storage for two years in strength point (p〉0.05). However, there is significant difference in breaking point, damaged nets (p〈0.05). Regarding the effect of reducing, the net strength during the storage, lack of significant difference between new storage net, represents a quality loss in making of new nets.
    Beschreibung: Published
    Schlagwort(e): Gillnet ; Strength ; Physical damage ; Storage ; Sturgeon ; Physical ; Quality
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp.155-162
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
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    Unbekannt
    In:  http://aquaticcommons.org/id/eprint/22166 | 18721 | 2018-02-16 16:51:09 | 22166 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-06-29
    Beschreibung: Every year, after fishing period, the sturgeon gillnets are assessed base on physical characters by the management of sturgeon fishes in Golestan Province. Net are put aside and replaced by new one if they qualification are not net. In spite of importance of strength ropes, unfortunately, there is a little research in this regards. In addition, previous research are not applied storage conditions and physical damages. Therefore, researcher are determined to do a research in this regards. For this reason some materials from new net, storage net, damaged net, put aside net, etc. collected and tested by an Instron. Then data analyzed by factorial test in complete randomized and variance and average compared in 5% significant level by SPSS version 17. The results shows that there is not significant difference between new net (blank) and new net kept in storage for two years in strength point (p〉0.05). However, there is significant difference in breaking point, damaged nets (p〈0.05). Regarding the effect of reducing, the net strength during the storage, lack of significant difference between new storage net, represents a quality loss in making of new nets
    Schlagwort(e): Engineering ; Fisheries ; Gillnet ; Strength ; Physical damage ; Storage ; Iran
    Repository-Name: AquaDocs
    Materialart: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 155-162
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    facet.materialart.
    Unbekannt
    In:  http://aquaticcommons.org/id/eprint/21813 | 18721 | 2018-01-08 09:48:42 | 21813 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-02
    Beschreibung: The effects of feeding frequency on growth performance, feed conversion ratio and survival of post-larvae Indian white shrimp, Penaeus indicus were evaluated in a 56-day study. The study was conducted in sixteen fiberglass tanks provided with aerated re- circulating water with four replicate tanks for each treatment. Twenty post larvae with a mean weight of 1.56 0.02g were hand-counted and stocked into each of the replicate tanks and fed 2, 4, 6 and 8 times a day, respectively. Final body weights were measured significantly lower at 2 and 4 times/day (5.76 0.08 and 5.96±0.15g, respectively) than 6 and 8 times/day (8.54±0.16 and 8.31 0.19g, respectively) treatments (P〈0.05). There were significant differences for the Feed Conversion Ratio (FCR) of shrimps fed 6 and 8 times/day with other treatments. The best mean FCR was obtained from the sixth daily-feeding (P〈0.05). The Specific Growth Rate (SGR) of shrimps fed 6 times/ day was significantly (P〈0.05) higher (3.03 0.04%) than shrimps fed with all other feeding regimes, while shrimps fed 8 times/ day had a higher SGR (2.95 0.05%) than shrimps fed 2 times/day (2.36 0.06%) and 4 times/day (2.39 0.11%). Survival rate was significantly different (P〈0.05). The best mean survival rate was obtained from 6 times/day feeding (P〈0.05). There were significant differences for survival rates (P〈0.05). The water quality parameters (salinity, dissolved oxygen and temperature) were not different among treatments. However, some water quality parameters (ammonium, nitrate, nitrite, phosphate and pH) were significantly different among the treatments. Results suggested that there was an advantage in feeding P. indicus more frequently than 4 times per day.
    Schlagwort(e): Aquaculture ; Biology ; Nutrition ; Penaeus indicus ; Feed Conversion Ratio ; growth ; survival ; water quality ; Penaeus indicus ; Iran
    Repository-Name: AquaDocs
    Materialart: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 129-136
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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