Widianingsih Widianingsih
Jurusan Ilmu kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Jl. H. Prof. Sudarto, SH, Tembalang Semarang, Indonesia. 50275.

Published : 49 Documents
Articles

STRUKTUR KOMUNITAS MAKROZOOBENTHOS DI PERAIRAN WILAYAH MOROSARI DESA BEDONO KECAMATAN SAYUNG DEMAK Ulfah, Yulia; Widianingsih, Widianingsih; Zainuri, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v1i2.2037

Abstract

The pond area of Bedono waters become a shallow water, due to the influence of high tide (rob). This condition affect the macrozoobenthos, one of the animals that live in the area. The objective of this research is to look for the macrozoobenthos community structure of in the Region Morosari Waters, Bedono District of Sayung, Demak. Twenty five polychaeta species were found in this research, 7 species of bivalves, 6 species of gastropods and 1 species of crustacean, with abundances ranging between 36-1331 ind/m2 with diversity index value (H ') in each research ranged from 2.95 (moderate diversity level) to 0.83 (low diversity level), with evennes index (e) ranged from 0.46 (moderate evennes index) to 1.00 (high evennes index). Domination index (C) ranged from 0.15 (this value shows that no domination index) to 0.69 (this value shows that domination index).
STIMULASI REPRODUKSI ASEKSUAL PADA STICHOPUS HORRENS DAN STICHOPUS VASTUS DI PERAIRAN PULAU KARIMUNJAWA, KABUPATEN JEPARA Hermawan, Hermawan; Widianingsih, Widianingsih; Hartati, Retno
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v1i2.2028

Abstract

Sexual reproduction on trepang has many constraint than asexual reproduction, such as fertilization success relies on broodstock number in nature and water conditions as a habitat for trepang. Therefore, research on production of trepang seed in needed. The aim of this research were to stimulate and observe fission ability and regeneration of trepang S. horrens and S. vastus (Family Stichopodidae) as well as determine survival rate of individual fission results. This research was conducted during October?December 2011 using field experimental method and analyzed descriptively. Stimulaton fission on this study conducted by tying 1/3 of anterior part of trepang body using a rubber band. Result showed that S. horrens dan S. vastus can be stimulated by fission. In both species, smaller group showed easier and quicker fission, but large group has higher regeneration. Posterior parts of the both species of sea cucumbers succesfully formed a new mouth complex. Posterior parts have higher survival rate than anterior.
KOMPOSISI DAN KELIMPAHAN GASTROPODA DI VEGETASI MANGROVE KELURAHAN TUGUREJO, KECAMATAN TUGU, KOTA SEMARANG Haryoardyantoro, Seto; Hartati, Retno; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v2i2.2469

Abstract

Mangrove forest is one of the unique natural ecosystems with high productivity. That comes from organic detritus or litter fall which is essential nutrient sources for organism souch as fish and inverterbrates, one of which is gastropod. The purpose of this study was to determine the composition and abundance of gastropods found in mangrove vegetation Tugurejo Village, District Tugu, Semarang. This study was conducted in September 2011-March 2012. This study material is all gastropods found at the sites. Research consists of 4 stations and samples were taken with using transek (1 x 1) m2 in 3 sub stations. The research revealed that there were 11 species of gastropod belonged to 3 families, i.e. C.rithidea cingulata cingulata, Cerithidea sp.1, Cerithidea sp.2, C. quadrata, T. telescopium, Terebralia palustris (Potamididae), Littorina articulata, L. carinifera, Littorina pallescense (Littorinidae), and Sphaerassiminea miniata (Assiminidae). The species most frequently found was C. cingulata cingulata and T. telescopium. While most species rarely found is C. quadrata. The highest abundance average value was found at Station C which was dominated by Avicennia marina. The diversity index (H ') at Station A and B was low, while at Station C and D was moderate. The Uniformity Index (e) at Station A and B was low but at Station C and D was high and moderate. There was species dominance is Cerithidea cingulata cingulata at Station C.
PENGARUH PERBEDAAN PERIODE AERASI KARBONDIOKSIDA TERHADAP LAJU PERTUMBUHAN DAN KADAR TOTAL LIPID PADA KULTUR NANNOCHLOROPSIS OCULATA Norbawa, Puji; Yudiati, Ervia; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v2i3.3126

Abstract

N. oculata is commonly used as a natural food in larviculture. Due to the fact on its highly lipid content, N. oculata is recently becoming one of a good candidate for a source of alternative energy. Microalgae utilizes CO2 during photosynthesis. This fact will lead and used this microalgaeas a carbondioxide degradator. Providing of carbon dioxide aeration is expected to increase the rate of growth of N. oculata as well as total lipid production.This research aimed to determine the effect of different periods on carbondioxide aerationon the growth rate and total lipid production in N. oculata culture.The results showed that different time on carbondioxide aeration was significantly different (P < 0.05) on the average growth rate as well as total lipid production. Carbondioxide aeration treatment for 3 minutes have the highest average growth rate which is0,574 doubling/ day. While the average growth rate at treatment aeration for 4 minutes almost equal to the control i.e. 0,484 doubling/ day and 0,462 doubling/ day. The highest percentage of total lipid production has reached in 4 minutes carbondioxide aeration treatment (80.58%-dw). Furthermore, the lipid production on 1 minute, 2 minutes aeration time and control were 65.98%-dw, 65.77%-dw and 64.98%-dw, respectively. The treatment with carbondioxide aeration for 3 min was the lowest (39.72%-dw). Based on these results it can be concluded that carbondioxide aeration for 3 minutes increased the growth rate of N. oculata. However, the incrementon growth ratewere not accompanied withthe incrementon total lipid production.
DENSITAS DAN KANDUNGAN TOTAL LIPID MIKROALGA SPIRULINA PLATENSIS YANG DIKULTUR PADA TINGKATAN PERBEDAAN FOTOPERIOD Manullang, Cristiana; Widianingsih, Widianingsih; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v1i1.883

Abstract

Spirulina platensis is belong to divisi of Cyanophyta which has ability for good adaption in fluctuativ condition where environment factors can influent the composisition of nutrion (lipid, protein, carbohydrate). Lipid has function for fatty acid resources, vitamins and for bioenergy resources. This research aims to know influence of photoperiod with density and total lipid microalga Spirulina platensis which is has been cultured in different photoperiod as a purpose. This research uses complete random plan and treatment of photoperiod 4 hours light 20 hours dark, 8 hours ligth 16 hours dark, 12 hours light 12 hours dark, 24 hours light. The results shows that the highest density of S.platensis on experiment 24 hours light is 1591± 16 x 103 sinusoidal/mL and lowest density on photoperiod 4 hours light 20 hours dark 1087 ± 62 x 103 sinusoidal/mL while higest total lipid amount presentation of lipid on photoperiod 4 hours light 20 hours dark 46,08 ±27,93 %-dw and the total lipid 24 hours light treatment is 24,76 ±5,23 %-dw.
ANALISIS DAYA DUKUNG KUALITAS AIR UNTUK KESESUAIAN WISATA DI PANTAI KARANG JAHE, REMBANG Kurniawati, Fitri; Pratikto, Ibnu; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v8i4.24926

Abstract

Pantai Karang Jahe merupakan salah satu destinasi wisata baru yang mulai  menjadi tujuan wisata  di Jawa Tengah. Sebagai tempat wisata  baru, Pantai Karang Jahe memerlukan pengembangan dalam upaya menarik wisatawan untuk berkunjung. Penelitian ini bertujuan untuk mengkaji kesesuaian dan daya dukung wisata  serta  mengkaji potensi daya tarik wisata Pantai Karang Jahe, Rembang, Jawa Tengah. Penelitian dilaksanakan pada bulan Januari-Februari 2019. Penelitian menggunakan metode survei dan penentuan lokasi dipilih dengan menggunakan metode purposive sampling,. Pada Penelitian ini dilakukan analisa Indek Kesesuaian Wisata (IKW)  dan analisa Daya Dukung Kawasan (DKK).  analisis data kesesuaian kawasan menggunakan rumus IKW= [ Ni / Nmaks] x 100 % dan analisis daya dukung kawasan Bertdasarkan pengamatan diperoleh hasil bahwa nilai IKW untuk rekreasi pantai pada stasiun 1, 2 dan 3 tergolong sangat sesuai (S1) dengan nilai 88,88%; 91,94%; 84,72%.  Nilai Daya Dukung Kawasan (DDK) yaitu kegiatan rekreasi pantai dengan luas 1200 m2 sebesar 96 orang/ hari, kegiatan berenang dengan luas 1100 m2 dapat menampung 88 orang/ hari, dan kegiatan bermain dengan luas 1000 m2 dapat menampung 80 orang/ hari. Berdasarkan hasil  analisa IKW dan DDK dapat disimpulkan bahwa  Pantai Karang Jahe sangat sesuai untuk kegiatan wisata pantai. Karang Jahe Beach is one of the new tourist destinations that is starting to become a tourist destination in Central Java. As a new tourist spot, Karang Jahe Beach requires development in an effort to attract tourists to visit. This study aims to examine the suitability and carrying capacity of tourism and examine the potential of the tourist attraction of Karang Jahe Beach, Rembang, Central Java. The study was conducted in January-February 2019. The study used a survey method and the location was chosen using the purposive sampling method. In this study an analysis of the Tourism Suitability Index (IKW) and the Regional Carrying Capacity (DKK) analysis were conducted. Based on observations, the results show that the IKW value for beach recreation at stations 1, 2 and 3 is classified as very suitable (S1) with a value of 88.88%; 91.94%; 84.72%. The carrying capacity of the Region (DDK) is beach recreation activities with an area of 1200 m2 totaling 96 people / day, swimming activities with an area of 1100 m2 can accommodate 88 people / day, and play activities with an area of 1000 m2 can accommodate 80 people / day. Based on the results of IKW and DDK analysis, it can be concluded that Karang Ginger Beach is very suitable for beach tourism activities. 
KEMAMPUAN FISSION TERIPANG HOLOTHURIA EDULIS DAN HOLOTHURIA LEUCOSPILOTA (HOLOTHURIDAE) UKURAN YANG BERBEDA DI KEPULAUAN KARIMUNJAWA Karim, Rafsanjani A.; Hartati, Retno; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v2i1.2068

Abstract

Sea cucumber is one of the important natural resources of Karimunjawa Islands. Because it has a high economic value, so fishermen exploit excessively it may reduce the population. Naturally sea cucumbers are able to reproduce asexually by fission process (division). This study aimed to determine the ability of fission and regeneration of sea cucumber Holothuria edulis and Holothuria leucospilota having different body sizes. The research was conducted in October-December 2011, in Karimunjawa waters. Jepara. Stimulation of fission carried out by binding sea cucumbers with a rubber band at 1/3 position of the anterior part. The results showed that the sea cucumber H. edulis and H. leucospilota successfully split at the 24. The difference in the size of cucumbers affect the fission time, while the intensity of regeneration of bigger sea cucumbers has higher value than a small one. The rate of fission of H. edulis and H. leucospilota 95-100%. Regeneration intensity of bigger H. edulis and H. leucospilota are higher than the small size. Posterior part of the body has higher survival rate is than the anterior.
PERBANDINGAN KOMPOSISI JENIS FITOPLANKTON ANTARA LAUT JAWA DAN BANDA Yuneni, Ranny Ramadhani; Widianingsih, Widianingsih; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v2i4.3685

Abstract

Pytoplankton in the waters has role as primary. Generally, the existence of phytoplankton in waters is supported by availability of light, nutrients, and other marine environment parameters. Java Sea is a sea that has shallow depth and Banda Sea has depth until more than 2000 meters. Many differences of characteristics, certainly organisms including phytoplankton, which are owned both the sea have different composition of phytoplankton, because of many factors influence it. The purpose of this research is study of comparison of phytoplankton spatial distribution horizontally between Java Sea and Banda Sea based on composition.Research was conducted in off shore of Java and Banda Sea. Data was collected with Research vessel of Baruna Jaya III was managed by BPPT (Balai Pengkajian dan Penerapan Teknologi) on 31th August ? 9th September 2012. Methods used descriptive explorative. Phytoplankton was collected by plankton net passively that has mashes was 5 ?m, lenght 65 cm, and diameter of meshes was 30 cm. Water was filtered as much as 30 l. result of filtering then stored in the bottle (200 ml). Station was collected as many as 14 stations. This Research was found 3 class of Phytoplankton, there were Bacillariophyceae (15 genera), Dinophyceae (4 genera), and Cyanophyceae (1 genera). The average abundance of Java Sea was 139 x 103 cells/m3 (range 115-189 x 103 cells/m3). Banda Sea had abundance range between 89-209 cells/m3 with average 146 x 103 cells/m3. Genera that had the highest of abundance was Rhizosolenia. The diversity index (H?) with range from 0,88 ? 2,15 (very low ? moderate). Uniformity index (e) values was with 0,67-0,88 (moderate-high), dominance index (D) was ranged from 0,12-0,51, just on station 17 that indicates dominating genus. Java and Banda Sea had identity community index (S) value was 76,47% (high category). Kruskal Wallis test (H) had values was 0,017 that lower than tabulated value of 6,63 at ? = 0,01. It means accept H1 conclude that there is no significant difference of phytoplankton abundance between Java Sea and Banda Sea.
BIOLOGI KRUSTASEA DI TRACKING MANGROVE KAWASAN TERUSAN PULAU KEMUJAN KEPULAUAN KARIMUNJAWA Kusumadewi, Irma; Pribadi, Rudhi; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v2i4.3689

Abstract

The mangrove ecosystem of KarimunjawaNastional Park relatively good and natural used as ecotourism area. Karimunjawa National Park Authority provides facilities such as Mangrove Tracking. The existence of tracking mangrovepredicted can influence to the ecologycal condition of crustaceans, so it is necessary to study on crustaceans and its baseline data for monitoring environmental condition purposes due to the ecotourism area establishment. Sampling has be done on June 2012 ? Maret 2013 at Mangrove Tracking Canal Zone Kemujan Island Karimunjawa Archipelago. Determination of sampling locations by using the method of purposive sampling method, then sampling used qualitative methods on 5m x 5m transect and quantitative on 1m x 1m transect. The results found crustaceans by 4 families and 6 species and 13 species of shrimp larvae. Infraordo Brachyura is the most dominant where found 3 families consist of 4 species, and then infraordo Anomura 1 families with 2 species and from infraordo Macrura found shrimp larvae. The most dominate type of crustacean from the result of this research is Clibanarius longitarsus. Crustacean abundance was highest at Station 5 (0.2 ind./25m2) and the lowest abundance at Station 7 (0.04 ind./25m2). Value diversity index (H?) and uniformity (e) are included in the low category and all research stations without domination.
STRUKTUR VEGETASI DAN KERAPATAN JENIS LAMUN DI PERAIRAN KEPULAUAN KARIMUNJAWA KABUPATEN JEPARA Wicaksono, Saputra Giri; Widianingsih, Widianingsih; Hartati, Sri Turni
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v1i2.2016

Abstract

Seagrass is the only flowering plants (Angiospermae) that have the rhizome, leaves and true roots that live submerged in the sea. Seagrass also has an important role as a nursery ground and Spawning ground in the life cycle in the sea. Seagrass beds in the Karimunjawa Islands has broad category of closure medium (33.03 %, BTN Karimunjawa 2005). Increasing community activity and climate change can be devastated to the extreme concern of seagrass Karimunjawa that sustainability should be maintained, it is necessary to do some research and re-checking the condition of seagrass Karimunjawa. Data is collected in October of 2010 in 10 locations including Kampung Ragas, Alang Alang, Merican, Telaga, Legon Bajak, Kapuran, Menjangan Besar Island North and South, Bengkoang Island, and Menjangan Kecil Island. The method used is the quadrant-sized transects (1 x 1 m). The results showed that the Karimunjawa waters has 8 (eight) seagrass species. Seagrass species are often found in the Karimunjawa Islands is the kind of Cymodocea rotundata Karimunjawa and Thalassia hemprichii. Highest percent (%) coverage of seagrass found in the location of Telaga reach 75.9% by Enhalus acoroides. Seagrass beds in the waters Karimunjawa quite good with the percentage Seagrass coverage value of 59.94%.