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STUDI KUALITAS LINGKUNGAN PERAIRAN DI DAERAH BUDIDAYA PERIKANAN LAUT DI TELUK KAPING DAN TELUK PEGAMETAN, BALI Slamet, Bejo; Arthana, I Wayan; Budiarsa Suyasa, I W.
Ecotrophic, Journal of Environmental Science Vol 3, No 1
Publisher : Udayana University

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Abstract

The purpose of this study was to know the coastal environmental quality of Kaping and Pegametan Bay coastal area. Thestudy was conducted from 14 stations with 3 replicates of water sampling and 5 replicates of makrozoobenthos sampling.The result showed that water quality namely TSS, DO, NH3 and BOD5 were still in line criterion stated by office of KLH(2004). About 49 species of makrozoobenthos were examined, with abundance of makrozoobenthos was 58-209 ind./ 1,125 cm2 anddiversity indeks was 1,56-2,91. The result on the integrated water quality analyses showed that the water quality all of station wasclassified to light pollution.This result showed that the enviromnental of Kaping Bay dan Pegametan Bay coastal area was competent for mariculturealthough lower compered with control. For the continuity of fisheries aquaculture in Kaping Bay dan Pegametan Bay, Long termeffort in environment conservation is needed better stretegy and action in an integrated and sustainable manners.
POLA PERTUMBUHAN LARVA IKAN KERAPU RAJA SUNU (Plectropoma laevis LACEPÈDE, 1801) DAN TINGKAT KONSUMSINYA TERHADAP ZOOPLANKTON ROTIFER (Brachionus rotundiformis) Melianawati, Regina; Astuti, Ni Wayan Widya; Slamet, Bejo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 4, No 2 (2012): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Usaha budidaya ikan kerapu raja sunu Plectropoma laevis mulai dilakukan untuk melestarikan keberadaannya yang sudah mulai langka. Penelitian ini bertujuan untuk mengetahui pola pertumbuhan larva ikan kerapu raja sunu hingga menjadi benih serta tingkat konsumsinya terhadap zooplankton rotifer Brachionus rotundiformis. Induk didomestikasi pada tangki beton bervolume 100.000 l. Telur hasil pemijahan induk ditetaskan menjadi larva dan selanjutnya larva dipelihara hingga menjadi benih. Pemeliharaan larva dilakukan pada bak beton bervolume 6.000 l. Selama pemeliharaan, larva diberi pakan berupa B. rotundiformis, Artemia dan pakan buatan. Parameter yang diamati meliputi diameter telur dan butir minyaknya, panjang total larva, panjang duri sirip punggung dan duri sirip perut larva serta jumlah zooplankton yang dikonsumsi larva dan suhu air media. Pengukuran setiap parameter tersebut dilakukan secara mikroskopis. Hasil penelitian menunjukkan bahwa telur ikan kerapu raja sunu yang digunakan dalam penelitian ini berdiameter 800-850 μm, sedangkan diameter butir minyaknya 168-200 μm. Larva yang baru menetas berukuran panjang total 2,53±0,13 mm. Pola pertumbuhan panjang total larva hingga menjadi benih adalah eksponensial, sedangkan pola pertumbuhan duri sirip punggung dan duri sirip perutnya adalah linear. Larva mengalami pertumbuhan yang sangat cepat setelah berumur 35 hari. Tingkat konsumsi larva terhadap zooplankton rotifer juga menunjukkan pola linear. Pertumbuhan larva hingga menjadi benih berlangsung selama 45-55 hari pada suhu air 27-29oC.Kata kunci: pertumbuhan, tingkat konsumsi, rotifer, larva, kerapu raja sunu
Fungsi Hidrologi Kebun Karet (Hevea brasiliensis Muell. Arg) dalam Mereduksi Besaran Curah Hujan Bersih (Hydrological Function of Rubber Plantation (Hevea brasiliensis Muell. Arg) to Reducing the Magnitude of Net Rainfall) Slamet, Bejo; Thoha, Achmad Siddik; Dinata, Riki Jaya
FORESTA Vol 1, No 2 (2012): Indonesian Journal Of Forestry Volume 1 No. 2 (Juli 2012)
Publisher : FORESTA

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Abstract

Forest conversion resulted in loss of various forest functions, mainly the hydrological function changes. Mostly of the conversion of forests were to be oil palm and rubber plantations. Rubber plantation although an artificial ecosystem but had the similarity to forest condition. The purpose of this research was to examine the role of rubber plantation to reducing net rainfall that reached the plantation ground through the interception loss mechanism. Water volume balance was used to measure the interception loss.The results showed that the interception on the rubber plantation increased with the increasing of rubber age. Through fall tend to decreased with the increasing of rubber age were 60.56%, 53.62% and 43.79% of the total precipitation for 10 years, 15 years and 25 years of age respectively during the research period. The percentage of stem flow was 5.98% 7.94%, and 4.39% of total precipitation for 10 years, 15 years and 25 years of age respectively. The percentage of interception on rubber plantation for 10 years, 15 years and 25 years were 331.76 mm (19.6%), 428.73 mm (25.3%), and 545.79 mm (51.81%) of the total rainfall (1053.3 mm) respectively. Rubber plantation had good potency to reducing the net rainfall that reached the ground. This condition also informed that rubber plantation could reduce the risk of floods occurrence.Key words: rubber plantation, net rainfall, interception, through fall, stem flow
THE GROWTH PATTERN OF BLACKSADDLED CORALGROUPER LARVAE (Plectropoma laevis LACEPÈDE, 1801) AND THEIR CONSUMPTION RATE TO ZOOPLANKTON ROTIFER (Brachionus rotundiformis) Melianawati, Regina; Astuti, Ni Wayan Widya; Astuti, Ni Wayan Widya; Slamet, Bejo; Slamet, Bejo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 4, No 2 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Blacksaddled coralgrouper Plectropoma laevis has been started to conserve to prevent from over exploitation. The study purposes were to determine the growth pattern during larvae to juvenile stage of Blacksaddled coralgrouper and their consumption rate to zooplankton rotifers Brachionus rotundiformis. Domesticated broodstocks have been rearing in 100,000 l concrete tanks. The eggs from spawning broodstocks were hatched and the larvae have been kept to juvenile. Larvae rearing was done in 6,000 l concrete tanks. During the rearing period, larvae were fed with zooplankton rotifer, artemia and artificial food. Parameters measured were eggs and oil globule diameter, larval total length, length of larval dorsal fin and ventral fin, the number of zooplankton that consumed by larvae and water temperature. Microscopic method was used to measure the parameters. The result showed that eggs and oil globule diameter ranged in 800-850 μm and 168-200 μm, respectively. Total length of newly hatched larvae was 2.53±0.13 mm. The growth pattern of total length from larva to juvenile stage was exponential, while the growth pattern of dorsal fin and ventral fin length was linear. Larvae grew very fast after 35 days old. The pattern of larval consumption rate to zooplankton rotifers was linear. Time period from larvae to juvenile stage was 45-55 days on water temperature 27-29oC.Keywords: growth, consumption rate, rotifers, larvae, Blacksaddled coralgrouper
THE GROWTH PATTERN OF BLACKSADDLED CORALGROUPER LARVAE (Plectropoma laevis LACEPÈDE, 1801) AND THEIR CONSUMPTION RATE TO ZOOPLANKTON ROTIFER (Brachionus rotundiformis) Melianawati, Regina; Astuti, Ni Wayan Widya; Astuti, Ni Wayan Widya; Slamet, Bejo; Slamet, Bejo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 4, No 2 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Blacksaddled coralgrouper Plectropoma laevis has been started to conserve to prevent from over exploitation. The study purposes were to determine the growth pattern during larvae to juvenile stage of Blacksaddled coralgrouper and their consumption rate to zooplankton rotifers Brachionus rotundiformis. Domesticated broodstocks have been rearing in 100,000 l concrete tanks. The eggs from spawning broodstocks were hatched and the larvae have been kept to juvenile. Larvae rearing was done in 6,000 l concrete tanks. During the rearing period, larvae were fed with zooplankton rotifer, artemia and artificial food. Parameters measured were eggs and oil globule diameter, larval total length, length of larval dorsal fin and ventral fin, the number of zooplankton that consumed by larvae and water temperature. Microscopic method was used to measure the parameters. The result showed that eggs and oil globule diameter ranged in 800-850 μm and 168-200 μm, respectively. Total length of newly hatched larvae was 2.53±0.13 mm. The growth pattern of total length from larva to juvenile stage was exponential, while the growth pattern of dorsal fin and ventral fin length was linear. Larvae grew very fast after 35 days old. The pattern of larval consumption rate to zooplankton rotifers was linear. Time period from larvae to juvenile stage was 45-55 days on water temperature 27-29oC.Keywords: growth, consumption rate, rotifers, larvae, Blacksaddled coralgrouper
EMBRYONIC DEVELOPMENT AND HATCHING EGGS RATIO OF BLACKSADDLED CORAL GROUPER (Plectropoma laevis) AT DIFFERENT TEMPERATURE MEDIA Andriyanto, Wawan; Slamet, Bejo; Ariawan, I Made Dharma Jaya
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

In seed production, the success of spawning and egg production is very important to mantain the cultivating sustainability. The quantity and quality of the blacksaddled coral grouper eggs should be properly manipulated to produce the higher values. The purpose of this study was to determine the effect of different temperatures on the results of hatch success (embryo development, incubation time, hatching rate and larvae abnormality). The eggs used were obtained from natural spawning and collected with egg collector. The fertilized eggs were incubated in four pieces of container and were treated with different temperatures of 26°C, 28°C, 30°C, and 32°C which each treatment was repeated 3 times. The incubation equipment with automatic temperature control was used in this treatment. The results showed that the eggs which were incubated at 32°C produced a faster of embryonic development and hatch within 14 hours while the temperature of 26°C took 18 hours to hatch. However, the temperature of 32°C resulted in low egg hatchability, with 60.29%, as well as the abnormalities of 8.42%. The best temperature of each treatment was obtained at the incubation temperature of 30°C, whereas the phase of the hatch was achieved within 15 hours, with egg hatchability of 92.25% and the abnormality of 6.29%. From these results, it can be concluded that the optimum incubation temperature for Blacksaddled coral grouper was 30°C. Keywords: hatching, egg of Blacksaddled coral grouper, Plectropoma laevis, incubation temperature.
THE GROWTH PATTERN OF BLACKSADDLED CORALGROUPER LARVAE (Plectropoma laevis LACEPÈDE, 1801) AND THEIR CONSUMPTION RATE TO ZOOPLANKTON ROTIFER (Brachionus rotundiformis) Melianawati, Regina; Astuti, Ni Wayan Widya; Astuti, Ni Wayan Widya; Slamet, Bejo; Slamet, Bejo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 4, No 2 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v4i2.7784

Abstract

Blacksaddled coralgrouper Plectropoma laevis has been started to conserve to prevent from over exploitation. The study purposes were to determine the growth pattern during larvae to juvenile stage of Blacksaddled coralgrouper and their consumption rate to zooplankton rotifers Brachionus rotundiformis. Domesticated broodstocks have been rearing in 100,000 l concrete tanks. The eggs from spawning broodstocks were hatched and the larvae have been kept to juvenile. Larvae rearing was done in 6,000 l concrete tanks. During the rearing period, larvae were fed with zooplankton rotifer, artemia and artificial food. Parameters measured were eggs and oil globule diameter, larval total length, length of larval dorsal fin and ventral fin, the number of zooplankton that consumed by larvae and water temperature. Microscopic method was used to measure the parameters. The result showed that eggs and oil globule diameter ranged in 800-850 μm and 168-200 μm, respectively. Total length of newly hatched larvae was 2.53±0.13 mm. The growth pattern of total length from larva to juvenile stage was exponential, while the growth pattern of dorsal fin and ventral fin length was linear. Larvae grew very fast after 35 days old. The pattern of larval consumption rate to zooplankton rotifers was linear. Time period from larvae to juvenile stage was 45-55 days on water temperature 27-29oC.Keywords: growth, consumption rate, rotifers, larvae, Blacksaddled coralgrouper
THE GROWTH PATTERN OF BLACKSADDLED CORALGROUPER LARVAE (Plectropoma laevis LACEPÈDE, 1801) AND THEIR CONSUMPTION RATE TO ZOOPLANKTON ROTIFER (Brachionus rotundiformis) Melianawati, Regina; Astuti, Ni Wayan Widya; Astuti, Ni Wayan Widya; Slamet, Bejo; Slamet, Bejo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 4, No 2 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v4i2.7784

Abstract

Blacksaddled coralgrouper Plectropoma laevis has been started to conserve to prevent from over exploitation. The study purposes were to determine the growth pattern during larvae to juvenile stage of Blacksaddled coralgrouper and their consumption rate to zooplankton rotifers Brachionus rotundiformis. Domesticated broodstocks have been rearing in 100,000 l concrete tanks. The eggs from spawning broodstocks were hatched and the larvae have been kept to juvenile. Larvae rearing was done in 6,000 l concrete tanks. During the rearing period, larvae were fed with zooplankton rotifer, artemia and artificial food. Parameters measured were eggs and oil globule diameter, larval total length, length of larval dorsal fin and ventral fin, the number of zooplankton that consumed by larvae and water temperature. Microscopic method was used to measure the parameters. The result showed that eggs and oil globule diameter ranged in 800-850 μm and 168-200 μm, respectively. Total length of newly hatched larvae was 2.53±0.13 mm. The growth pattern of total length from larva to juvenile stage was exponential, while the growth pattern of dorsal fin and ventral fin length was linear. Larvae grew very fast after 35 days old. The pattern of larval consumption rate to zooplankton rotifers was linear. Time period from larvae to juvenile stage was 45-55 days on water temperature 27-29oC.Keywords: growth, consumption rate, rotifers, larvae, Blacksaddled coralgrouper
EMBRYONIC DEVELOPMENT AND HATCHING EGGS RATIO OF BLACKSADDLED CORAL GROUPER (Plectropoma laevis) AT DIFFERENT TEMPERATURE MEDIA Andriyanto, Wawan; Slamet, Bejo; Ariawan, I Made Dharma Jaya
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v5i1.7766

Abstract

In seed production, the success of spawning and egg production is very important to mantain the cultivating sustainability. The quantity and quality of the blacksaddled coral grouper eggs should be properly manipulated to produce the higher values. The purpose of this study was to determine the effect of different temperatures on the results of hatch success (embryo development, incubation time, hatching rate and larvae abnormality). The eggs used were obtained from natural spawning and collected with egg collector. The fertilized eggs were incubated in four pieces of container and were treated with different temperatures of 26°C, 28°C, 30°C, and 32°C which each treatment was repeated 3 times. The incubation equipment with automatic temperature control was used in this treatment. The results showed that the eggs which were incubated at 32°C produced a faster of embryonic development and hatch within 14 hours while the temperature of 26°C took 18 hours to hatch. However, the temperature of 32°C resulted in low egg hatchability, with 60.29%, as well as the abnormalities of 8.42%. The best temperature of each treatment was obtained at the incubation temperature of 30°C, whereas the phase of the hatch was achieved within 15 hours, with egg hatchability of 92.25% and the abnormality of 6.29%. From these results, it can be concluded that the optimum incubation temperature for Blacksaddled coral grouper was 30°C. Keywords: hatching, egg of Blacksaddled coral grouper, Plectropoma laevis, incubation temperature.
DEVELOPMENT OF DIGESTIVE ENZYMES ACTIVITY ON BLACK SADDLED CORAL GROUPER (Plectropomus laevis) LARVAE Slamet, Bejo; Aslianti, Titiek
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 8, No 1 (2016): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v8i1.12427

Abstract

ABSTRACTProtease, amylase, and lipase enzymes were used as biological indicators to measure larvae’s food digestion. The aim of this study was to describe digestive enzyme activity development of black saddled coral grouper (Plectropomus laevis) larvae. The just hatching larvae were reared in concrete tank 2x3x1 m3 with stocking density of 10 larvae/L. In the larval rearing media were added with Nanochloropsis oculata at 105 cel/ml started from 1 day old (D-1). The larvae was fed with rotifer (Brachionus rotundiformis) at 10-20 ind/ml started from D-2 and artificial diet from D-10. To analyze  the protease, amylase, and lipase enzymes activities, samples were taken 0.5-1 g or about 1000 larvae on D-3, D-4, D-6, D-8 and 500 larvae on D-10, D-12, D-16, and D-20. The result showed that the protease, amylase, and lipase enzymes activity were positively correlated with the growth. Digestive enzymes activity was increased when larvae started on endogenous feeding (D-3), become down on D-6, stable on D-8 to D-10, increased on D-12, and reached the highest level on D-16. Digestive enzymes activity was higher when larvae started feeding with artificial diet compared to the larvae before feeding with artificial diet. Keywords:  digestive enzymes, development, larvae, blacksaddled coral grouper