The impacts of AMPEP K+ (Ascophyllum marine plant extract, enhanced with potassium) on the growth rate, carrageenan quality, and percentage incidence of the damaging epiphyte Neosiphonia apiculata on four strains of the commercially important carrageenophyte Kappaphycus, as developed by micropropagation techniques

2020 ◽  
Vol 32 (3) ◽  
pp. 1907-1916 ◽  
Author(s):  
Majid Khan Majahar Ali ◽  
Alan T. Critchley ◽  
Anicia Q. Hurtado
Keyword(s):  
Growth Rate ◽  
Plant Extract ◽  
Marine Plant ◽  
Commercially Important ◽  
Percentage Incidence ◽  
Carrageenan Quality ◽  
Neosiphonia Apiculata

scholarly journals Study the morphological properties of isolates of Sclerotinia sclerotiorum on different of plant extract

2019 ◽  
pp. 401-407
Author(s):  
Arwa. O. AlDahmani ◽  
Najat. K. ElGariani ◽  
Zainab S. Albozidy
Keyword(s):  
Growth Rate ◽  
Sclerotinia Sclerotiorum ◽  
Plant Extract ◽  
Morphological Properties ◽  
Different Shapes ◽  
White Cotton ◽  
The Difference ◽  
Plant Families

Five isolates of Sclerotinia sclerotiorum were isolated from different plant families: Sca, Scu, Egg, Sep, Sle. The study showed a clear difference between these isolates when studying Their agricultural characteristics, such as the growth and growth rate of mecellium and the production and size of stone bodies between these isolates. All isolates showed growth of transparent mecillium and then evolved and became white cotton on different Nutritious medium. The stone bodies formed in different shapes and sizes depending on themedium and the difference in the number of days of composition. The medium of potatoes, dextrose (PDA) and carrots (CaA) showed the highest growth rate and number of stone bodies of all isolates compared to other.

scholarly journals Seasonal change in growth rate, carrageenan yield and quality from the red alga (Kappaphycus striatus) cultivated in Cam Ranh bay

2021 ◽  
Vol 18 (4) ◽  
pp. 763-771
Author(s):  
Le Dinh Hung ◽  
Le Thi Hoa
Keyword(s):  
Growth Rate ◽  
Southwest Monsoon ◽  
Red Alga ◽  
Northeast Monsoon ◽  
Lower Growth ◽  
Yield And Quality ◽  
Cultivation Period ◽  
Lower Growth Rate ◽  
Carrageenan Yield ◽  
Carrageenan Quality

The red alga Kappaphycus striatus was cultivated at Camranh Bay, KhanhHoa, Vietnam. For a 30 day cultivation period, the alga showed the higher growth rate (4.1 - 5.8 % day-1) from October 2014 to April 2015 and in September 2015, while the lower growth rate (2.5 - 3.1 % day-1) was found from May to August 2015. The carrageenan quality was done for a 60-day cultivation period, the carrageenan yield and gel strength showed little variation with the higher values (28.1 - 28.7 % and 855 - 935 g cm-2, respectively) obtained from November 2014 to March 2015 and lower ones (25.1 - 26.7 % and 555 - 758 g cm-2, respectively) from April to September 2015. The data on moisture content of alga (33.5 - 36.8 %), clean anhydrous algal/salt ratio (0.92 - 1.07), and carrageenan yield obtained in this study fulfilled those of standards for carrageenophytes. This study shows that the red alga K. striatus can be grown in the tropical waters of the Camranh Bay during the northeast monsoon and a part of the southwest monsoon as a source of materials for carrageenan production.

scholarly journals Peningkatan kualitas karagenan rumput laut Kappaphycus alvarezii dengan metode budidaya keranjang jaring

2016 ◽  
Vol 15 (2) ◽  
pp. 124 ◽  
Author(s):  
Ismail Failu ◽  
Eddy Supriyono ◽  
Sugeng Hari Suseno
Keyword(s):  
Growth Rate ◽  
Kappaphycus Alvarezii ◽  
Gel Strength ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Cultivation Method ◽  
Yield Value ◽  
Carrageenan Quality ◽  
Seaweed Culture

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">This study aimed to analyze the quality of <em>Kappaphycus alvarezii </em>seaweed carrageenan cultured using methods basket nets in waters of Baruta, Sangia, Wambulu, District of Buton, Southeast Sulawesi. The study consisted of three treatments in triplicates. Seaweed culture used different cultivation net-basket forms i.e. net-basket box, net-basket lantern, and longline without net-basket (control). Quality of <em>K. alvarezii</em> seaweed obtained in this study varied from each treatments. Daily growth rate in each treatment were not significantly different. Production of seaweed with a net-basket box (201.61 g/m<sup>2</sup>) was higher than the net-basket lanterns (183.22 g/m<sup>2</sup>), but not significantly different from control (196.98 g/m<sup>2</sup>). Carageenan yield value of control (46.74%) was the highest of all treatments. The water content of carrageenan in each treatment was not significantly different and it ranged from 17.20–17.39%. The viscosity of carrageenan in net-basket lantern (179.40 cPs) was the highest of all treatments. Carrageenan gel strength was the best treatment (702.53 g/cm²). As conclusion, using the net-basket lantern  as cultivation method provided quality improvement of carrageenan in <em>K. alvarezii</em> seaweed.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: <em>Kappaphycus alvarezii</em>, cultivation methods, carrageenan quality</p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong><strong></strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">Penelitian ini bertujuan untuk menganalisis kualitas karagenan rumput laut <em>Kappaphycus alvarezii </em>yang dibudidaya menggunakan metode keranjang jaring di perairan Baruta, Kecamatan Sangia, Wambulu, Kabupaten Buton Sulawesi Tenggara. Penelitian terdiri atas tiga pelakuan dan tiga ulangan. Pemeliharaan rumput laut dilakukan dengan metode keranjang jaring berbeda yaitu metode keranjang jaring kotak, keranjang jaring lampion, dan longline tanpa menggunakan keranjang jaring (kontrol). Hasil pengamatan kualitas rumput laut <em>K. alvarezii </em>dalam penelitian ini bervariasi dari setiap perlakuan yang diberikan. Laju pertumbuhan harian pada setiap perlakuan tidak berbeda nyata. Produksi rumput laut dengan metode keranjang jaring kotak (201,61 g/m<sup>2</sup>) lebih tinggi dibandingkan jaring lampion (183,22 g/m<sup>2</sup>), namun tidak berbeda nyata dengan kontrol (196,98 g/m<sup>2</sup>). Nilai rendemen karagenan kontrol (46,74%) lebih tinggi dari perlakuan lainnya. Kadar air karagenan pada setiap perlakuan tidak berbeda nyata yaitu berkisar 17,20–17,39%. Viskositas karagenan perlakuan metode keranjang jaring lampion (179,40 cPs) lebih tinggi dibandigkan perlakuan lainnya. Kekuatan gel karagenan perlakuan metode keranjang jaring lampion (702,53 g/cm²) lebih tinggi dibandingkan perlakuan lainnya. Berdasarkan hasil tersebut, maka dapat disimpulkan bahwa metode keranjang jaring lampion memberikan peningkatkan kualitas karagenan rumput laut <em>K. alvarezii </em>yang dibudidayakan.</p><p class="NoParagraphStyle"> </p><p>Kata kunci: <em>Kappaphycus alvarezii</em>, metode budidaya,  kualitas karagenan</p>

Biochemical Changes in Fed and Starved Oysters, Ostrea Edulis L. During Larval Development, Metamorphosis and Early Spat Growth

1973 ◽  
Vol 53 (2) ◽  
pp. 287-298 ◽  
Author(s):  
D. L. Holland ◽  
B. E. Spencer
Keyword(s):  
Growth Rate ◽  
Larval Development ◽  
Glycogen Content ◽  
Biochemical Changes ◽  
Energy Reserve ◽  
Initial Growth ◽  
Ostrea Edulis ◽  
Short Term ◽  
Bivalve Larvae ◽  
Commercially Important

Although a great deal is known about methods for the culture of commercially important bivalve larvae (see, for example, Loosanoff & Davis, 1963; Walne, 1964, 1966) little information is available on the biochemical changes that take place during larval development.Collyer (1957) determined the glycogen content of several batches of newly released larvae of Ostrea edulis and found that viability was not related to the initial glycogen content. Millar & Scott (1967) showed that lipid was the major energy reserve used during starvation by newly released O. edulis larvae. Recently Helm, Holland & Stevenson (1973) have shown that the initial growth rate of newly released O. edulis can be positively correlated with the lipid content of the larvae on liberation.The present paper describes the biochemical changes that occur during larval development, metamorphosis and early spat growth of O. edulis. In addition, short-term starvation experiments were carried out to determine whether protein, lipid or carbohydrate serves as the main energy reserve during each phase of development.

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