Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal JURNAL ILMIAH PLATAX
Gaspar D. Manu
Unknown Affiliation
Environmental Science

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
STRUKTUR KOMUNITAS TERIPANG (HOLOTHUROIDEA) DI KAWASAN PANTAI DESA ONDONG KECAMATAN SIAU BARAT KABUPATEN SIAU TAGULANDANG BIARO1 Syafludin Lagio; Lawrence J.L. Lumingas; Gaspar D. Manu
Jurnal Ilmiah PLATAX Vol. 2 No. 3 (2014): EDISI SEPTEMBER-DESEMBER 2014
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.2.3.2014.9122

Abstract

Sea cucumbers is a group of marine invertebrates belonging to class  holothuroidea. At this time, the hunting for sea cucumber is not just targetted on the expensive species, but also the cheap one. The exploitation pressure has caused population decline which  can cause changes in their community structure. This research was aimed to understand the types of sea cucumber, analyze the structure of the community sea cucumber which includes the density of individuals, diversity index, the dominance index, interspecific  and the dispersion pattern. Sample collection was done at night at the lowest tide in December, 2013. Based on the research activities in the coastal areas of Ondong, west Siau district, Siau-Tagulandang-Biaro regency, 7 species of holothuroidea were found : Holothuria atra, Holothuria leucospilota, Actinopyga echinites, Actinopyga lecanora, Bohadschia argus, Bohadschia marmorata and bohadschia vitiensis, respectively with mean individual density of 0.797 ind/m2, diversity index (H’ = 1.718), equity index or harmony (e = 0. 883), dominance index (C = 0.218), interspecific association between 7 species forming 5 pairs of positive associations and 16 pairs of negative association andrandomdistribution. Keywords : Structure communities, sea cucumber, Ondong, Sitaro   ABSTRAK Teripangadalah sekelompokinvertebrata lautyang termasuk dalam kelasHolothuroidea. Pada saat ini, perburuanuntukteripangtidak hanyaditargetkanpada spesiesmahal, tetapi jugayang murah. Tekananeksploitasitelah menyebabkanpenurunan populasiyang dapat menyebabkanperubahan pada strukturkomunitasnya. Penelitian inibertujuan untukmemahami jenisteripang, menganalisisstrukturteripangyang meliputikepadatanindividu, indeks keanekaragaman, indeksdominasi, asosiasi antar spesies danpola penyebaran. Pengambilan sampeldilakukanpada malam harisaat surut terendahpada bulan Desember2013.Berdasarkankegiatan penelitiandiwilayah pesisirOndong, kecamatan SiaubaratKabupatenSiau-Tagulandang-Biaro, ditemukan 7spesiesteripang : Holothuriaatra, Holothurialeucospilota, Actinopygaechinites, Actinopygalecanora, Bohadschiaargus, Bohadschiamarmoratadanbohadschiavitiensis,masing-masing dengankepadatan individurata-rata0.797ind/m, indeks keanekaragaman(H' = 1.718), indekskemerataan atau keserasian(e = 0.883), indeksdominansi(C = 0.218), asosiasiantar 7spesiesmembentuk5pasangasosiasipositif dan16pasangasosiasinegatif danpenyebaran acak.   Kata kunci : Struktur komunitas, teripang, Ondong, Sitaro   1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi
KARAKTERISTIK MORFOMETRIK DAN FAKTOR KONDISI KERANG TOTOK (Polymesoda erosa) DI HUTAN MANGROVE DESA NUSAJAYA KECAMATAN WASLEI SELATAN KABUPATEN HALMAHERA TIMUR MALUKU UTARA Alfrina Rumbiak; Jan F.W.S. Tamanampo; Gaspar D. Manu
Jurnal Ilmiah PLATAX Vol. 2 No. 3 (2014): EDISI SEPTEMBER-DESEMBER 2014
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.2.3.2014.9123

Abstract

Clam, Polymesoda erosa is species that live in sandy and muddy substrata of mangrove ecosystem. The aims of this study are to look at the relationship of the shell length and width,body thiekness, body weight and organ weight based on class size to determine the growth. The study also was designed to reveal the conditional factor based on the clam class size. The samples were collected during the day at lowest tide in January 2014. The total is 153 individuals of Polymesoda erosa clam were collected during the study. The result shows thare is a strong positive relationship between body lenght and body weight as shown within  the regression analysis with intercept (a) = 0,470779,  regression coefficient (b) = 0,69095 and correlation coefficient (r) = 0,406357. Based on the r value, it can be concluded that there is strong relationship regarding the length and weight increment as much as 40,63 %.   Keywords : Characteristics Morphometrics and Shellfish totok condition factor Nort Maluku ABSTRAK .         Kerang  totok (Polymesoda erosa) adalah salah satu jenis moluska dalam kelas bivalvia yang hidup di ekosistem mangrove pada daerah yang bersubstrat pasir dan berlumpur. Penelitian ini bertujuan. mengetahui kisaran ukuran panjang cangkang,,lebar cangakang, tubuh, berat tubuh, dan berat organ lunak, selanjutnya mengetahui pertambahan panjang, lebar cangkang, tebal tubuh, berat tubuh, dan berat organ lunak berdasarkan kelas ukuran, dan juga  mengetahui hubungan pertumbuhan panjang cangkang, dan berat cangkang, dan  mengetahui faktor kondisi kerang di setiap kelas ukuran.  Pengambilan sampel di lakukan pada siang hari saat surut terendah pada bulan januari 2014. Berdasarkan kegiatan penelitian di wilayah pesisir Desa Nusajaya Kecamatan Waslei Selatan Kabupaten Halmahera Timur Maluku Utara, dikumpulkani  153 individu kerang totok (Polymesoda erosa). Hasil analisis regresi menunjukkan bahwa setiap pertambahan panjang cangkang akan diikuti dengan pertambahan berat secara proporsional mengikuti nilai Intercept (a) = 0.470779, dan koefisien regresi (b) = 0,690957. Niilai koefisien korelasi (r) = 0. 406357 menyatakan  adanya korelasi positif yang menerangkan terdapat keeratan hubungan  antara pertambahan panjang cangkang dengan pertambahan berat berat tubuh sebesar 40.63 %   Kata kunci :Karakteristik Morfometrik dan Faktor kondisi KerangTotok Maluku utara   1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi  
Phytoplankton Composition and Factors Of Physics – Chemical Water Depth On Water Lake Tondano Ade Primanur B. Wiyono; Jan F. W. S Tamanampo; Gaspar D. Manu
Jurnal Ilmiah PLATAX Vol. 4 No. 2 (2016): EDISI JULI-DESEMBER 2016
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.4.2.2016.13876

Abstract

Research on phytoplankton composition and physico-chemical factors of the Central part of Tondano waters was done by taking water samples from the depths of 5 M, 10 M and 20 M, respectively. The purpose of the study was to identify the phytoplankton, determine the species density and diversity index, and the physico-chemical factors of water with depth. Results revealed that 8 species of phytoplantkon were found at 8 m depth dominated by Chlorophyceae (2 species with 228 cells/liter), and Bacillariophyceae (3 species with 168 cells / liter). Thirteen species were recorded at 10 m depth dominated by  Clorophyceae (7 species with 1728 cells / liter), and Bacillariophyceae (3 species with 984 cells / liter). Meanwhile, there were 8 species found at 20 m depth dominated by Bacilariophyceae (4 species with 3828 cells / liter) and Chlorophyceae (one species with 84 cells / liter). The results of the analysis of the ecological index at a water depth of 5 m to 20 meters earn variation of species diversity index (H ', H'miax, H'min) with a value of 1779-1039, 1832-1069, 1707-1008), the dominance index (D) with value of 0.204 - 0.4722, and harmony with the index value of 0.7406 - 0.3535.Based on t-test, species diversity index(H) of the phytoplankton at all 5 M depth was not different from that at  10 M), but the spesies diversity index was different between 5 M and 20 M depth and between 10 M and 20 M. The results of measurements of chemical physics parameters of water at a depth of 5 M to 20 M has a range of concentrations (TDS 149- 151 mg / L, DHL 232-234 mg / L, pH 7.2 - 6.79, Total Phosfat 0.0008 - 0.062 mg / L, dissolved Phosfat 0.0 mg / L, Total Nitrogen 0065-0027 mg / L, Ammonia 0031-0012 mg / L, and Nitrate 0.83 - 1.70 mg / L Keyword : Tondano Lake, Phytoplankton, Density   ABSTRAK Penelitian tentang komposisi fitoplankton dan faktor fisika-kimia dari bagian Tengah perairan Tondano dilakukan dengan mengambil sampel air dari kedalaman masing – masing  5 M, 10 M dan 20 M. Tujuan dari penelitian ini adalah untuk mengetahui komposisi dan kepadatan populasi phytoplankton, indeks-indeks ekologi, dan faktor lingkungan fisik kimia perairan berdasarkan kedalaman air. Hasil penelitian menunjukkan bahwa 8 spesies fitoplankton ditemukan pada kedalaman 8 m didominasi oleh Chlorophyceae (2 spesies dengan 228 sel / liter), dan Bacillariophyceae (3 spesies dengan 168 sel / liter). Tiga belas spesies tercatat di kedalaman 10 m didominasi oleh Clorophyceae (7 spesies dengan 1.728 sel / liter), dan Bacillariophyceae (3 spesies dengan 984 sel / liter). Sementara itu, ada 8 spesies yang ditemukan pada kedalaman 20 m didominasi oleh Bacilariophyceae (4 spesies dengan 3828 sel / liter) dan Chlorophyceae (satu spesies dengan 84 sel / liter). Hasil analisis indeks ekologi pada kedalaman air  5 m sampai 20 meter mendapatkan variasi  Indeks keanekaragaman spesies (H’, H’miax, H’min) dengan nilai 1.779 – 1.039, 1.832 – 1.069, 1.707 – 1.008), indeks dominasi (D) dengan nilai 0.204 – 0.4722, dan indeks keserasian dengan nilai 0.7406 – 0.3535. Berdasarkan t-tes, indeks keanekaragaman spesies (H) dari fitoplankton di semua kedalaman 5 M tidak berbeda dengan  10 M), tetapi indeks spesies keanekaragaman berbeda antara kedalaman 5 M dan 20 M dan antara 10 M dan 20 M. Hasil pengukuran parameter fisika kimia perairan pada kedalaman 5 M sampai 20 M mempunyai kisaran konsentrasi (TDS 149- 151 mg/L, DHL 232 – 234 mg/L, pH  7.2 – 6.79, Total Phosfat 0.0008 – 0.062 mg/L, Phosfat terlarut  0.0 mg/L, Total Nitrogen 0.065 – 0.027 mg/L, Amoniak  0.031 – 0.012 mg/L, dan Nitrat  0.83 – 1.70 mg/L Kata kunci : Danau Tondano, Fitoplankton, Kepadatan 1 Mahasiswa Program Studi Manajemen Sumberdaya Perairan, FPIK Unsrat 2 Staf Pengajar Program Studi Manajemen Sumberdaya Perairan, FPIK Unsrat
Community Structure Of Sea Cucumber (Holothuroidea) In The Coastal Area Of The Island Of Jailolo Subdistrict Nyaregilaguramangofa South Halmahera Regency West Of North Maluku Gajali Husain; Jan W. S. F. Tamanampo; Gaspar D. Manu
Jurnal Ilmiah PLATAX Vol. 5 No. 2 (2017): ISSUE JULY - DECEMBER 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.5.2.2017.15910

Abstract

Sea cucumbers (Holothuroidea) are a group of marine invertebrate animals of the class Holothuroidea (phylum Echinodermata). At present, hunting of sea cucumbers is not only targeted at species of high economic value, but also of low economic value. The pressure of exploitation has led to a decline in the population that can cause changes in the structure of the community. The purpose of this research is to understand the type of sea cucumber, analyze the structure of sea cucumber which includes individual density, diversity index, domination index, inter species association and dispersion pattern. Sampling was conducted at night during the lowest tide in April 2016. Based on the results of research conducted in the coastal area of Nyaregilaguramangofa Island, South Jailolo district, West Halmahera Regency, North Maluku. Species of sea cucumbers found in the study sites were 6 species of sea cucumber: Holothuria atra, Holothuria hilla, Holothuria scabra, Bohadschia marmorata, Bohadschia vitiensis and Ophedesoma grisea, each with an average individual density of 0.029 ind/m2, the diversity index (H '= 1,495), the fairness index (e = 0.834), the dominance index (C = 0.260), the association between the six species forming 4 pairs of positive associations and 11 pairs of negative associations and the entire population has a randomly distributed pattern.Keywords: Structure communities, Holothuroidea, Nyaregilaguramangofa, Nort Maluku  ABSTRAKTeripang (Holothuroidea) adalah kelompok hewan avertebrata laut dari kelas Holothuroidea (filum Echinodermata). Pada saat ini, perburuan teripang tidak hanya ditargetkan pada spesies yang bernilai ekonomis tinggi, tetapi juga yang bernilai ekonomis rendah. Tekanan eksploitasi telah menyebabkan penurunan populasi yang dapat menyebabkan perubahan pada struktur komunitasnya. Adapun tujuan dari penelitian ini yaitu untuk memahami jenis teripang, menganalisis struktur teripang yang meliputi kepadatan individu, indeks keanekaragaman, indeks dominasi, asosiasi antar spesies dan pola penyebaran. Pengambilan sampel dilakukan pada malam hari saat surut terendah pada bulan April 2016. Berdasarkan hasil penelitian dilakukan di kawasan pantai Pulau Nyaregilaguramangofa, kec. Jailolo Selatan Kab. Halmahera Barat, Maluku Utara. Spesies teripang yang ditemukan di lokasi penelitian berjumlah 6 spesies teripang: Holothuria atra, Holothuria hilla, Holothuria scabra, Bohadschia marmorata, Bohadschia vitiensis dan Ophedesoma grisea, masing-masing dengan kepadatan individu rata-rata 0.029 ind/m, indeks keanekaragaman (H' = 1.495), indeks kemerataan atau keserasian (e = 0.834), indeks dominansi (C = 0.260), asosiasi antar 6 spesies membentuk 4 pasang asosiasi positif dan 11 pasang asosiasi negatif dan keseluruhan populasi memiliki pola  penyebaran secara  acak.Kata kunci : Struktur komunitas, teripang, Nyaregilaguramangofa, Maluku Utara 
Zooplankton Community in The Waters of Lab Faculty of Fisheries and Marine Science East Likupang North Minahasa Marlinda R. Malara; Gaspar D. Manu; Ruddy D. Moningkey
Jurnal Ilmiah PLATAX Vol. 8 No. 1 (2020): ISSUE JANUARY-JUNE 2020
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.8.1.2020.27598

Abstract

The purpose of this study was to determine the type, density, and community structure of the Zooplankton including the Diversity Index (H '), Dominance Index (C), and Evenness (e). Sampling was carried out on November 12, 2019, using planktonet to a depth of 10 m from sea level, and carried out vertically as much as 3 times at each sampling point. The results obtained were 22 genus 26 species in 3 classes, namely: Paracalanus sp, Rhincalanus sp, Calanus sp., Corycaeus sp., Acrocalanus sp., Oncaea sp., Oithona sp., Scolecithricella sp., Euterpina sp., Eurytemora sp., Centropages sp., Ctenocalanus sp., Eucalanus sp., Pseudocalanus sp., Microsetella sp., Nauplius sp., Squilla sp., Siriella sp., Pseudeuphausia sp., Nematocelis sp., Zoea., Solenocera sp. The highest relative density was found in Paracalanus sp which was 39.38%. The Diversity (H ') of zooplankton at two sampling points is classified as moderate. These values indicate the community of planktonic organisms in the areas of study is less diverse. And Dominance Index (C) shows that no species dominates the waters of East Likupang.Keywords: Community; Zooplankton; East Likupang; Domination; Diversity.AbstrakTujuan penelitian ini adalah untuk mengetahui jenis, kepadatan, dan  struktur komunitas Zooplankton seperti Indeks Keanekaragaman (H’), Indeks Dominansi (C), dan Keseragaman (e). Pengambilan sampel dilakukan pada 12 November 2019 mengunakan planktonet sampai kedalaman 10 m dari permukaan laut, dilakukan secara vertikal sebanyak 3 kali pada setiap titik. Berdasarkan hasil pengamatan diperoleh 22 genus 26 spesies dalam 3 kelas yaitu : Paracalanus sp, Rhincalanus sp, Calanus sp., Corycaeus sp,  Acrocalanus sp., Oncaea sp, Oithona sp., Scolecithricella sp., Euterpina sp., Eurytemora sp., Centropages sp., Ctenocalanus sp., Eucalanus sp., Pseudocalanus sp., Microsetella sp., Nauplius sp., Squilla sp., Siriella sp., Pseudeuphausia sp., Nematocelis sp., Zoea., Solenocera sp. Kepadatan Relatif tertinggi terdapat pada Paracalanus sp yakni 39.38%. Keanekaragaman (H’) zooplankton di dua titik tergolong sedang. Nilai tersebut menunjukkan komunitas organisme dalam kondisi yang kurang beragam. Dan Dominansi (C) menunjukkan tidak ada spesies yang mendominasi di perairan Likupang Timur.Kata kunci: Komunitas; Zooplankton; Likupang Timur; Dominasi; Keanekaragaman.
Sea cucumber community in the coastal area of the Bahoi Village,West Likupang Sub-district, North Minahasa District Andia Tri Fritama Lumbu; Lawrence J. L. Lumingas; Gaspar D. Manu
Jurnal Ilmiah PLATAX Vol. 8 No. 1 (2020): ISSUE JANUARY-JUNE 2020
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.8.1.2020.27601

Abstract

This research is conducted in the coastal waters of Bahoi Village, West Likupang Sub-district, North Minahasa District with the aims to know the types of sea-related environmental factors in the research site and know the community structure of the sea cucumber including the density, Index of diversity, dominance index, and distribution patterns. Data collection was done by using the line transect method, and sampling technique by using quadrat. The results of the study found 5 species of sea cucumber i.e. Holothuria atra,  Holothuria scabra,  Bohadschia marmorata, Actinopyga echinites, and  Bohadschia vitiensis. The individual density of all species is 0.12 ind/m2, and the diversity index (H ') 0.950. The value of the similarity index/compatibility obtained is e = 0.918. The result of the calculated dominance index of sea cucumber species is 1.0 and the pattern of spreading species of sea cucumber in the research site shows a random spread pattern because the value of dispersion index  (I) approaches 1 (one). Keywords: community; Sea cucumber; Bahoi; Dominance; Diversity.AbstrakPenelitian ini dilakukan di perairan pantai desa Bahoi, Kecamatan Likupang Barat, Kabupaten Minahasa Utara dengan tujuan untuk mengetahui jenis-jenis teripang yang ada di lokasi penelitian dan mengetahui struktur komunitas teripang yang meliputi kepadatan, indeks keanekaragaman, indeks dominasi, dan pola penyebaran. Pengambilan data dilakukan dengan metode line transek, dan teknik pengambilan sampel dengan mengunakan kuadrat. Hasil penelitian ditemukan 5 spesies teripang yaitu Holothuria atra, Holothuria scabra, Bohadschia marmorata, Actinopyga echinites dan Bohadschia vitiensis. Kepadatan individu dari seluruh spesies yaitu 0,12 ind/m2, indeks keanekaragaman (H’) 0,950. Nilai indeks kemerataan/keserasian diperoleh nilai indeks e = 0,918. nilai indeks dominasi spesies teripang diperoleh 1,0 dan pola penyebaran spesies teripang dilokasi penelitian menunjukkan pola sebaran acak (random) dikarenakan nilai indeks dispersi (I) mendekati 1 (satu).Kata Kunci : Komunitas; Teripang; Perairan Bahoi; Dominasi; Keanekaragaman
Co-Authors Ade Primanur B. Wiyono Alfrina Rumbiak Andia Tri Fritama Lumbu Gajali Husain Jan F. W. S Tamanampo Jan F.W.S. Tamanampo Jan W. S. F. Tamanampo Lawrence J. L. Lumingas Lawrence J.L. Lumingas Marlinda R. Malara Ruddy D. Moningkey Syafludin Lagio