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  • 1
    Online Resource
    Online Resource
    EM International, Publishers of Quality International Journals ; 2022
    In:  Ecology, Environment and Conservation ( 2022-9-30), p. S47-S51
    In: Ecology, Environment and Conservation, EM International, Publishers of Quality International Journals, ( 2022-9-30), p. S47-S51
    Abstract: Milkfish is an important commodity with high economical value, delicious meat, relatively reachable price, disease attack resistance, and non-cannibalistic, which can live in high stocking density and can be cultured in polyculture system with other animals and plants, therefore encourages many fish farmers to perform this culture system. This study was performed in experimental method with three treatments and three replications of different water exchange systems, namely, once in 2 days (Tank A), everyday (Tank B), and everyday water circulation (Tank C). Milkfish seeds with average initial weight of 11.37 ± 0.97 g and average initial length of 6.08 ± 0.78 cm were maintained for 45 days at different water exchange systems and fed with Megami pellet feed. The results showed that Tank C with water circulation performed everyday was the best treatment to improve the milkfish seed production with 100% survival rate, 1.77±0.01%.day-1 specific growth rate, 4370.37 ±1.28μm.day-1 absolute length growth, and 31.91 ±2.82% feed efficiency.
    Type of Medium: Online Resource
    ISSN: 0971-765X
    Language: Unknown
    Publisher: EM International, Publishers of Quality International Journals
    Publication Date: 2022
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  • 2
    In: Journal of Marine and Coastal Science, Universitas Airlangga, Vol. 8, No. 1 ( 2020-08-04), p. 38-
    Abstract: Kappaphycus alvarezii is one of Indonesia's export commodities because it has high economic value as food and industry. One area in East Java which is the center of seaweed cultivation is Sumenep regency such as Saronggi and Bluto. Currently Sumenep Regency is an area for oil and gas exploration and exploitation. Types of pollutants resulting from these activities cause pollution in aquatic environments such as lead (Pb), mercury (Hg) and cadmium (Cd). The heavy metals found in the waters can be absorbed and accumulated in the seaweed thallus. The purpose of this research is to know the heavy metal content of Pb, Hg, Cd, chlorophyll-a, and cell morphology in E. cottonii in Bluto and Saronggi waters. This research is survey and descriptive research. The results showed that there are differences in heavy metal content of lead in E. cottonii, seawater, and sediments in Bluto waters and Saronggi waters. The waters of Bluto have a lower amount of chlorophyll-a than the Saronggi Waters. Cell wall thickness in E. cottonii in Saronggi Waters has thinner cell walls than Bluto waters. Measurement of water quality in Bluto and Saronggi waters through temperature, pH, salinity, brightness and DO parameters. The measurement results from both waters are not any striking difference and under optimal conditions.
    Type of Medium: Online Resource
    ISSN: 2301-6159 , 2528-0678
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2020
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  • 3
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 2, No. 1 ( 2010-04-01), p. 21-30
    Abstract: AbstractGracilaria cultivation is basically in need of lighting for photosynthesis process which will be a great effect on growth. The use of fluorescent (FL) as a replacement for the sun light is used for fluorescent lamps produce white light, except that fluorescent lights do not increase the room temperature drastically culture (temperature stable) and the intensity of light produced in the culture room suitable for the growth of shoots Gracilaria verrucosa. In addition to light intensity, while irradiation also affects the growth of cultured algae. Long exposures are generally set according to the needs of algae in natural conditions. In the process of photosynthesis is need a light and dark reaction. Light reaction occurs in the conversion of light energy into chemical energy and dark reactions occur for the formation of glucose that used for catabolism system. This study aims to determine the best long exposures of the different long exposures which can affect the growth and the amount of chlorophyll a of G. verrucosa. The methods is an experimental that used Complete Random Design (RAL) as the experimental design. The treatment used is different irradiation time, the treatment A (long irradiation for 24 hours, control), treatment B (irradiation time 12 hours light: 12 hours dark), treatment C (irradiation time 8 hours light: 16 hours dark) and D treatment (irradiation time 16 hours light: 8 hours dark) of each treatment is repeated five times. The main parameters were observed daily growth rate (%/day) and the amount of chlorophyll a (µg/ml) of G. verrucosa. Supporting the observed parameters are pH, temperature (ºC) and salinity (%o) The analysis data is using of variants analysis (ANOVA), if there is a difference data followed by Duncan's Multiple Range Test to determine the best treatment. The results showed that different irradiation time take a real effect (P 〈 0.05) on the growth and the amount of chlorophyll a G. verrucosa. Daily weight growth rate of the highest average found in treatment D (irradiation time 16hour light: 8-hours dark) of 0.62%/day, and the lowest in treatment A (24-hour long light irradiation) of 0.23%/day. The highest number of chlorophyll a average at the end of the study are in treatment D (irradiation time 16-hours light : 8 hours dark) of 0.0068 µg/ml and the lowest in treatment A (24-hour long light irradiation) of 0.0048 µg/ml. The increasing daily growth rate of G. verrucosa can used of the irradiation time 16-hours light : 8-hours dark.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2010
    detail.hit.zdb_id: 2980856-X
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  • 4
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 7, No. 1 ( 2015-04-01), p. 47-53
    Abstract: Abstract Aquatic resources that have great potential to be developed is a pigment obtained from seaweed. According Winarno (1996), seaweeds are clasified into three classes, namely red algae (Rhodophyceae), brown algae (Phaeophyceae) and green algae (Chlorophyceae). There are three main types of pigment in the seaweed, namely: chlorophyll, carotenoids, and phycocyanin (Lila, 2004). Each type of pigment that provides different benefits to human life. Red seaweed spicifera types Acanthophora be extracted and taken the pigment has a branch color (thallus) are varied, due to the pigment composition consisting of chlorophyll a, chlorophyll d, and fikobiliprotein (R-phycocyanin, allofikosianin and fikoeritrin) (Lee, 2008) . Fikoeritrin is the dominant pigment in red algae, thus giving the appearance of red on the thallus. The use of pigments is very important not only in the food and beverages, but also in medicines, cosmetics and pharmaceutical industrial. It is one of the determinants of consumer acceptance of products offered. Source of pigments used are also used by consumers as one of the indicators in assessing the quality of a product. The use of natural or synthetic dyes in the product will enhance the visual appeal that will increase consumer preference for products offered, therefore, the use of natural dye for industrial cannot be avoided. Based on the description above, this study will extract the pigment from red algae (A.spicifera) with a polar solvent (ethanol, distilled water) which will be used as a dye in catfish sausage with different proportions and determine the color stability during storage at cold temperatures and using the analytical method for determining the wavelength spectrophotometer fikoeritrin extraction results. The aim of the study is getting the appropriate method to produce the red pigment of seaweed A. spicifera, obtain the pigmen concentrate that can be applied to the catfish sausage and determine the stability of the color pigment A. spicifera on application of catfish sausages during storage. The study consisted of two examination to obtain the best dose of A. spicifera pigmen. The first step is to find wavelength of fikoeritrin. The design of the study is completely randomized design RAK with 12 treatmens and 3 replications. The results of the study showed that the red pigmen A. spicifera can be used as a dye in catfish sausage with the best concentration of 0.75%. Concentration and storage time catfish sausage significant effect on the intensity of reddish and yellowish color, but not significantly different to the intensity of brightness and water content. The concentration of pigment A. spicifera different in catfish sausage on organoleptic test gives a significant difference in color, smell and flavor
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2015
    detail.hit.zdb_id: 2980856-X
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  • 5
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 6, No. 2 ( 2014-11-01), p. 129-132
    Abstract: Abstract Chondroitin sulfate are drugs for osteoarthritis which usually made from pig cartilage and shark , the material can not be accepted because of the prohibition of pork and rare of shark. This study developed a method of Nakano, Garnjanagoonchorn, and Volpi . Extraction and isolation of chondroitin sulfate from alternative raw materials such as the rays and cuttlefish cartilage materials because both are abundant and cheap. Isolation results were analyzed using Fourier Transform - Infrared and Thermal Analysis diffrential, obtained 2.37% chondroitin sulfate from shark cartilage, 1.57 % from ray’s, while the squid was not obtained chondroitin sulfate.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2014
    detail.hit.zdb_id: 2980856-X
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  • 6
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 3, No. 2 ( 2011-11-01), p. 203-214
    Abstract: Abstract One of Indonesia's marine living resources is seaweed. There are about 18,000 species of seaweed around the world and 25 species of which have high economic value. In indonesia, there are 555 types of seaweed and four types of which are known as export commodities, that is Euchema sp., Gracilaria sp., Gelidium sp. and Sargasum sp. One type of algae is much cultivated in the waters of Indonesia is Gracilaria sp. Seaweed is widely cultivated because it has an important role in the effort to increase fish production and preservation of biological resources. However, sometimes the other result are found a lot of waste of seaweed in the field. Utilization of seaweed waste of Gracilaria sp. can be applied into organic fertilizer that is through a biological fermentation process using microbial proteolytic. The aims of the study to determine the effect of the waste seaweed fermentation of Gracilaria sp. with Bacillus subtilis on plankton populations of Chlorophyceae. The research was perform in August 2011 at the Laboratory of Fisheries Education, Faculty of Fisheries and Marine, University of Airlangga, Surabaya. The design of experiments in this study using Completely Randomized Design (CRD) with 6 treatments and 4 replications. The treatments were: (A) control, (B) 10ml/l of seaweed waste liquid without fermentation, (C) 5ml/l of seaweed waste liquid using fermentation, (D) 10ml/l of seaweed waste liquid using fermentation, (E) 15ml/l of seaweed waste liquid using fermentation, (F) 20ml/l of seaweed waste liquid using fermentation. The main parameter is plankton populations of Chlorophyceae, while supporting parameter water quality. Data analysis using analysis of variance (ANOVA), when there is a difference followed by Duncan's Multiple range test. The results showed that the utilization of waste seaweed of Gracilaria sp. Using fermentation with isolated bacterial of Bacillus subtilis produce significantly different population (p 〈 0.05) and D the treatment that is 10ml/l of seaweed waste liquid using fermentation, showed the highest cell density of 264,252 cells / ml. Based on the results of Duncan's Multiple range test showed that the D treatment give the best effect among all of the treatments. Water quality parameters during the study remained within the tolerance limit for the growth of Chlorophyceae, pH 7-8 and the water temperature ranges between 2729o C.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2011
    detail.hit.zdb_id: 2980856-X
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  • 7
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 1, No. 1 ( 2009-04-01), p. 117-120
    Abstract: Abstract The higher toxicity of α-linolenic acid from Ulva sp. seaweed showed the high algicidal activity against Chattonella marina and Heterosigma akashiwo. Among six species tested, C. marina and H. akashiwo was the most susceptible to this fatty acid, whereas LC50 of α-linolenic acid was estimated to be 3.22 and 0.58 µg/mL, respectively. Furthermore, α-linolenic acid also showed algicidal activity against Alexandrium tamarense and A. taylori. It is suggested that α-linolenic acid is useful mitigation agents to Harmful Algal Bloom effect, especially on Chattonella marina and Heterosigma akashiwo.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2009
    detail.hit.zdb_id: 2980856-X
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  • 8
    Online Resource
    Online Resource
    Universitas Airlangga ; 2014
    In:  Jurnal Ilmiah Perikanan dan Kelautan Vol. 6, No. 2 ( 2014-11-01), p. 193-200
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 6, No. 2 ( 2014-11-01), p. 193-200
    Abstract: Abstract The pressure on the aquatic environment progressively increasing due to the influx of waste from various activities in areas that have been built in coastal areas. Waste is one of the issues that must be handled properly. Inadequate waste management with the application of inappropriate technology will cause negative effects on the environment because the waste contains harmful chemicals and toxic. One of the common chemicals contained in the waste is ammonia. Utilization of aquatic plants can be used to overcome the problem of ammonia. Mangrove Avicennia alba is a water plant that can be used to absorb ammonia in the water. This research is conducted to determine the effect and the ability of mangrove A. alba as bioabsorption of ammonia in the water. Based on the research conducted, A. alba can act as bioabsorbtion for ammonia in the water. A. alba can absorb ammonia content in water from 10 mg/L to 0 mg/L within seven days with the highest uptakes are in treatment of P3 (5 mg/L) and treatment of P4 (10 mg/L). Treatment of P2 (1 mg/L) is the highest average nitrogen contain with 0.9244 %.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2014
    detail.hit.zdb_id: 2980856-X
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  • 9
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 6, No. 2 ( 2014-11-01), p. 143-148
    Abstract: Abstract Most organic materials utilized mangrove detritus such as mangrove leaves fall throughout the year. Organic particles or litter into a place to live for bacteria, fungi and other microorganisms. One of organic compounds in the soil is cellulose. Deciduous leaves on the ground allows that the cellulose content in the soil is high, it is possible to find cellulose degrading bacteria in the mangrove ecosystem. Soil sampling conducted in April 2014 located in Gunung Anyar Surabaya estuaries and Bancaran Bangkalan estuaries. After taking the samples, the isolation of cellulolytic bacteria and bacteria calculation were conduct using standard Total Plate Count (TPC). Based on the results of the calculation of total number bacteria, obtained the highest total number of cellulolytic bacteria at station E (Bancaran) of 4.9 x 104 CFU/ml. The highest percentage of cellulolytic bacteria obtained at station D (Bancaran) with a percentage of 27.09%. According to the whole calculation of the total number of bacteria, total number and percentage of cellulolytic bacteria, it was found that the area of Bancaran Bangkalan has higher abundance of cellulolytic bacteria than Gunung Anyar Surabaya mangrove areas.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2014
    detail.hit.zdb_id: 2980856-X
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  • 10
    In: Jurnal Ilmiah Perikanan dan Kelautan, Universitas Airlangga, Vol. 5, No. 2 ( 2013-11-01), p. 117-122
    Abstract: Abstract This research is done by doing a test fermentation technology in order to manufacture enriched media probiotic (probiotic 's) and the identification of the type and number of probiotic bacteria, and nutrient elements absorption of N and P. Results obtained shows that the number of microbes Lactobacillus sp. as probiotic bacteria may increase on media waste Gracilaria sp., Kappaphycus sp., Sargassum sp. and the levels of nitrogen and phosphor is high from fermented waste with media indicating that the fermentation kelp Gracilaria sp. waste provides the best results compared to fermentation waste Kappaphycus sp. and Sargassum sp.
    Type of Medium: Online Resource
    ISSN: 2528-0759 , 2085-5842
    Language: Unknown
    Publisher: Universitas Airlangga
    Publication Date: 2013
    detail.hit.zdb_id: 2980856-X
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