Janny D Kusen | Universitas Sam Ratulangi (original) (raw)

Papers by Janny D Kusen

Research paper thumbnail of Struktur Komunitas Ikan Family Chaetodontidae Sebagai Indikator Kondisi Kesehatan Lingkungan Ekosistem Terumbu Karang DI Zona Tradisional Pulau Bunaken Taman Nasional Bunaken

JURNAL PESISIR DAN LAUT TROPIS, 2021

The presence of coral reef fishes, especially family Chaetodontidae is one of bioindicators to en... more The presence of coral reef fishes, especially family Chaetodontidae is one of bioindicators to environment health condition of coral reef. Fish indicator research in Bunaken Island waters aims to find out the community structure, such as the composition, abundance, density, equality, diversity and dominance. Data collection was conducted at 5 (five) locations in the Bunaken Island Traditional Zone where there are 5 (five) observation points respectively, namely TP-1 Mandolin, TP-2 Alung Banua, TP-3 Sachiko, TP-4 Muka Kampung, and TP-5 Bunaken Timur. Data collection by underwater visual census (UVC) techniques using SCUBA. The results showed there were 23 species of indicator fish from family Chaetodontidae, total individuals number of each species in 5 research sites as many as 97 individuals. The highest fish density is 0.06 at TP-5 while the lowest value in TP-2 with density value 0.02. Through indicator fish community structure indicates that the coral reef quality conditions is ...

Research paper thumbnail of (Editor- in- Chief)

komunikatif dan menarik. Mengingat bahwa kebutuhan untuk berbagi pengalaman dan pengetahuan terus... more komunikatif dan menarik. Mengingat bahwa kebutuhan untuk berbagi pengalaman dan pengetahuan terus meningkat, maka berdasarkan saran-saran dan masukan-masukan yang kami peroleh dari para penelaah dan pembaca, jurnal Pesisir & Lautan akan hadir ke hadapan Anda tiga kali dalam setahun dimulai sejak penerbitan edisi ketiga ini. Semoga jurnal ini dapat menjadi suatu media informasi bagi para pemerhati maupun praktisi pengelolaan sumberdaya pesisir dan lautan. Selamat membaca dan kontribusi Anda kami nantikan. For the third edition of Pesisir & Lautan journal, we have redesigned the format and appearance, in order to make it more attractive and communicative. The need for sharing experience and knowledge is increasing from day to day; hence, in response to many suggestion and inputs from reviewers, readers and subscribers (both domestic and abroad), we have decided that the journal will be published three times a year commencing this edition. We hope that this journal will be more attract...

Research paper thumbnail of Community structure of mangrove in Mantehage Island and Paniki Island, North Sulawesi, Indonesia

Aacl Bioflux, 2019

The determination of mangrove community structure was conducted in Mantehage Island and Paniki Is... more The determination of mangrove community structure was conducted in Mantehage Island and Paniki Island, North Sulawesi, Indonesia. The continous quadrant method was used. This method uses a 10x10 m quadrant as the observation base, an auxiliary line set cut (perpendicular to the coastline) on one part of the mangrove ecosystem as an observation track. A total of 8 different species of mangroves were identified in the study area belonging to Malpighiales (Rhizophoraceae), Myrtales (Lythraceae, Combretaceae) and Sapindales (Meliaceae). The most abundant mangrove species across the thirteen stations is Ceriops tagal with a density of 3,020 individuals per hectare. Species richness index, diversity index, evenness index and dominance index were calculated to determine the diversity of mangroves along the study area. Station 3 obtained the highest species richness and station 6 obtained the lowest species richness. Station 2 recorded the highest diversity and station 6 recorded the lowest...

Research paper thumbnail of Protogynous hermaphroditism in the sand diver Trichonotus filamentosus

NIPPON SUISAN GAKKAISHI, 1991

Sexual patterns of the sand diver Trichonotus filamentosus were studied using specimens collected... more Sexual patterns of the sand diver Trichonotus filamentosus were studied using specimens collected at Hakata Bay, Kyushu, Japan, between 1986-1989. The species was found to be a protogynous hermaphrodite for the following reasons: (1) The males are not only larger in body size than females, but also have a different body form and color, with intermediate types occurring within a range where the male and female sizes overlap. (2) Differences in annuli in otoliths between the sexes suggest that males are older than females. (3) Bisexual gonads occur in 4.58% of the specimens examined histologically. (4) Bisexual gonads and mature testes exhibit secondary structure. The size frequency distributions of the males and females, and the occurrence of specimens with bisexual gonads indicate that the sand diver of Hakata Bay undertakes protogynous sex change at 80-120mm SL, after the spawning season in summer. It has also been found that the present species is monandric, because all males have secondary testes.

Research paper thumbnail of (Editor- in-chief)

Pesisir dan Lautan Indonesia ” kembali hadir dengan perubahan judul, yakni “Pesisir & Lautan”, me... more Pesisir dan Lautan Indonesia ” kembali hadir dengan perubahan judul, yakni “Pesisir & Lautan”, menyusul edisi pertama yang terbit bulan Maret 1998 dengan desain yang lebih menarik. Judul baru tersebut diharapkan akan lebih atraktif dan mudah diingat pembaca. Perubahan judul jurnal ini tidak mengubah tema dan tujuan jurnal, dimana masih membicarakan masalah-masalah yang berkaitan dengan pengelolaan sumberdaya pesisir dan lautan di Indonesia. Penerbitan edisi kedua ini diharapkan akan lebih bermanfaat dan dapat membantu semua kalangan, terutama para pemerhati serta pihak-pihak yang peduli terhadap pelestarian serta pengelolaan sumberdaya pesisir dan lautan, sekaligus dapat berperan sebagai media informasi dalam mengulas permasalahan pengelolaan sumberdaya pesisir dan lautan. Akhirnya saya ucapkan selamat membaca dan kontribusi serta saran-saran anda kami tunggu selalu.

Research paper thumbnail of STRUKTUR KOMUNITAS KARANG DAN BIOTA ASOSIASI PADA KAWASAN TERUMBU KARANG DI PERAIRAN DESA MINANGA KECAMATAN MALALAYANG II DAN DESA MOKUPA KECAMATAN TOMBARIRI. (Coral Structure Community and Its Association Organism In Coral Reef at Minanga Village of Malalayang II and Mokupa Village of Tombariri ...

Research paper thumbnail of 北スラウェシ州の国立自然公園(Bunaken及びTangkoko)における観光現状とエコツーリズムに関する意向調査

日本観光研究学会全国大会学術論文集, Dec 1, 2011

Research paper thumbnail of Study Of Hard Coral (Scleractinia) Recruitment In The Molas Waters, Manado City

Jurnal Ilmiah PLATAX, 2022

Coral recruitment is the entry of new coral individuals into coral reef populations due to reprod... more Coral recruitment is the entry of new coral individuals into coral reef populations due to reproduction or migration. Juvenile coral is the result of metamorphosis and growth of coral planula measuring 5 cm and attached to certain substrates. There are two types of substrates in the waters, stable substrates and unstable substrates such as rubble. The purpose of this study was to study hard coral recruitment, both in terms of density, the composition of juvenile coral colony types, size, and the type of substrate occupied by juvenile corals. This research was conducted in August 2021 in the waters of Molas, Bunaken District, Manado City. The method used for site selection is the purposive sampling method and data collection using a sampling method with quadrant transects. The results showed that the density of coral recruitment at the study site was 8,43 colonies/m2. The percentage of juvenile coral attachment on stable substrates is 90% and 10% on unstable substrates. The average s...

Research paper thumbnail of (Nematocysts of the Scleractinian Coral, Pocillopora eydouxi)

The aims of this research were to know the type, composition, and nematocysts dimension of Sclera... more The aims of this research were to know the type, composition, and nematocysts dimension of Scleractinian Coral, Pocillopora eydouxi. Pocillopora eydouxi that used on this study was collected from Malalayang Beach, Manado. There were two main types of nematocysts found on Pocillopora eydouxi, i.e., holotrichous isorhizas (HI) and microbasic p-mastigophore (MpM). The nematocysts composition showed that HI more abundant than MpM. HI type had capsule length 63,38 ± 11,36 µm (mean ± SD) and capsule width 19,25 ± 4,60 µm (mean ± SD), while MpM had capsule length 27,05 ± 3,68 µm (mean ± SD), capsule width 7,05 ± 1,88 µm (mean ± SD) and shaft length 19,59 ± 4,67 µm (mean ± SD). The results concluded that Pocillopora eydouxi had two major nematocysts, i.e., HI and MpM, therefore, could be recommended to take more advanced study about typically role of both nematocysts type respectively.

Research paper thumbnail of Studies on the Sexual Patterns in Ten Species of Japanese Marine Fishes

Research paper thumbnail of 北スラウエシ州の国立自然公園(Bunaken及びTangkoko)における観光現状とエコツーリズムに関する意向調査

Research paper thumbnail of Research Report on the Current Tourism Conditions and Questionnaire Research on Ecotourism in the National Nature Parks, Bunaken and Tangkoko, in the North Sulawesi, Indonesia

Research paper thumbnail of Foraminifera Bentik Pada Terumbu Karang Pulau Bunaken

JURNAL PESISIR DAN LAUT TROPIS, Jan 15, 2020

Study of benthic foraminifera on the coral reefs of Bunaken Island, North Sulawesi Province, was ... more Study of benthic foraminifera on the coral reefs of Bunaken Island, North Sulawesi Province, was carried out with the aim of providing information regarding the description, distribution and FoRAM Index values on the coral reef environment of Bunaken Island. Sediment sampling in the field was carried out at 5 stations around the island, each area has been plotted on the map, with 3 repetitions and using a SCUBA tool at a depth of 3-8 meters. From observations of sediment surface samples at 15 points in 5 stations spread over Bunaken Island, 5,770 benthic foraminifera specimens have been identified. 81 species from 26 genera of foraminifera were identified and they were then grouped into functional groups to obtain the FoRAM Index. The Index were ranged from 7.18 to 10.5. This indicates that the environment of the coral reef waters around the island is still in good condition.

Research paper thumbnail of Status persentase tutupan karang scleractinia di pulau Bunaken (Taman Nasional Bunaken) dan di pantai Malalayang, pesisir kota Manado

JURNAL PESISIR DAN LAUT TROPIS, 2017

Karang scleractinia atau karang batu merupakan karang pembentuk terumbu. Sehingga penentuan statu... more Karang scleractinia atau karang batu merupakan karang pembentuk terumbu. Sehingga penentuan status kondisi karang batu menjadi bagian penting dan sangat menentukan peran ekologis dan ekonomis ekosistim terumbu karang. Salah satu parameter untuk mengetahui kondisi karang batu yaitu persentase tutupan di alam. Penelitian dilakukan menggunakan metode deskriptif kuantitatif dengan tehnik pengambilan data dengan menggunakan LIT (Line InterceptTransect) yang selanjutnya dianalisis dengan Persentase Tutupan Karang setelah data diolah dengan ‘benthic life form’. Parameter lingkungan berupa salinitas dan suhu air serta kecerahan juga diukur.Hasil penelitian menunjukkan bahwa persentase tutupan di perairan pantai Malalayang Kota Manado dalam status kategori ‘poor’ (Buruk) khususnya di kedalaman 3 dan 5 meter yaitu pada kisaran antara 0-24,9 %, sekalipun pada kedalaman 10 meter hanya kategori ‘good’ (Baik), pada kisaran antara 50 – 69,9 %.. Sedangkan di stasiun penelitian Pulau Bunaken baik ...

Research paper thumbnail of Distribusi Vertikal Karang Batu (Scleractinia) Di Perairan Desa Kalasey, Kabupaten Minahasa

JURNAL PESISIR DAN LAUT TROPIS, 2015

Penelitian ini dilaksanakan dengan tujuan untuk mengetahui struktur komunitas dan distribusi vert... more Penelitian ini dilaksanakan dengan tujuan untuk mengetahui struktur komunitas dan distribusi vertikal karang scleractinia di perairan Desa Kalasey.Jumlah spesies yang ditemukan pada lereng terumbu berjumlah 48 dan pada rataan terumbu 38.Jumlah koloni pada lereng terumbu berjumlah 190 dan pada rataan terumbu 133.Spesies Porites lobata memiliki kepadatan relatif tertinggi pada lereng terumbu dan Favites halicora pada rataan terumbu, masing-masing dengan nilai 20%. Nilai indeks keanekaragaman menunjukkan keanekaragaman tinggi pada lereng terumbu (3,12) dan keanekaragaman sedang pada rataan terumbu (2,95). Secara umum, kedua loaksi tersebut memiliki pola penyebaran seragam. Hasil indeks kemerataan pada lereng terumbu 0,80 dan rataan terumbu 0,81. Kedua nilai tersebut digolongkan pada komunitas yang stabil.

Research paper thumbnail of Struktur komunitas foraminifera benthik berdasarkan habitat di perairan Sulawesi Utara

JURNAL PESISIR DAN LAUT TROPIS, 2017

Penelitian mengenai struktur komunitas foraminifera telah dilakukan di beberapa lokasi di peraira... more Penelitian mengenai struktur komunitas foraminifera telah dilakukan di beberapa lokasi di perairan Sulawesi Utara yang bertujuan untuk mengetahui jenis-jenis foraminifera benthik dan struktur komunitas berupa kepadatan, keanekaragaman, kemerataan dan dominansi. Juga untuk mengetahui pola penyebaran foraminifera secara umum. Pegambilan sampel foraminifera dilakukan di garis pantai di zona intertidal, di beberapa kedalaman, dan juga di ekosistim yang berbeda seperti mangrove, lamun dan terumbu karang. Sampel diambil secara volumetri di Desa Salurang (Stasiun 1), Desa Binebas (Stasiun 2), Desa Bulo (Stasiun 3), Kelurahan Malalayang (Stasiun 4, dan Kelurahan Molas (Stasiun 5). Koordinat dari masing-masing stasiun dicatat mengacu pada tampilan posisi koordinat pada alat GPS (Global Positioning System). Pada setiap titik di tiap stasiun sampel yang terdapat dalam sedimen pasir dan lumpur diambil menggunakan alat keruk sekop dan dimasukkan dalam wadah plastik berlabel ukuran 240 ml. Sampel...

Research paper thumbnail of Protogynous hermaphroditism in the wrasse Choerodon azurio

NIPPON SUISAN GAKKAISHI, 1991

Research paper thumbnail of Study on the seaweeds of Ambon Island, Indonesia

... Ambon Island is located in the Eastern Indonesia at 162 Page 2. Gerung GS et al.: Seaweeds of... more ... Ambon Island is located in the Eastern Indonesia at 162 Page 2. Gerung GS et al.: Seaweeds of Ambon Island, Indonesia 3°33'-3°43'S, 128°0'-128°16'E. The water condition in Ambon Bay is strongly influenced by the physics and biology of the ocean, the island, and the climate. ...

Research paper thumbnail of Meristic And Morfometric Characteristics Of Scad Mackerel Decapterus macarellus (Cuvier, 1833)

Jurnal Ilmiah PLATAX

Fish are cold-blooded vertebrates, whose body movements and balance are mainly using fins, breath... more Fish are cold-blooded vertebrates, whose body movements and balance are mainly using fins, breathing through gills, and living in an aquatic environment. Most vertebrates in the world are fish covering 48.1%, mammals (10.8%), reptiles (14.4%), amphibians (6.0%), and birds (20.7%). One of the fish consumed in North Sulawesi is scad mackerel locally called malalugis. This research focused on the meristic and morphometric characteristics of blue scad. The samples were caught in Makalehi waters and then landed in Manado Bay. Meristic observations (related to the number) included the number of spines and soft dorsal fin, pectoral fin, pelvic fin, anal fin (anal), and caudal fin. There were 9 spines on the first dorsal (D1), 2 spines and 30-37 soft rays on the second dorsal (D2), 3 spines and 24-31 soft rays on the anal fin (A), and 1,327 linea lateralis (LL). The morphometric observations cover total length, standard length, fork length, head length, tail stem length, eye width, body wid...

Research paper thumbnail of Acanthuridae in Bitunuris Waters Talaud Islands

Jurnal Ilmiah PLATAX

This study aims to determine the species of fish from the Acanthuridae family in Bitunuris Villa... more This study aims to determine the species of fish from the Acanthuridae family in Bitunuris Village, Salibabu Island, Talaud Islands Regency. Fish samples were caught using monofilament gill nets with a mesh size of 1.5 inches, net length of 15 m, and net height of 2 m. Sampling was carried out in April and May 2021. A total of 63 individuals were caught consisting of nine species. Acanthurus nigrofuscus 40 individuals, 10.0-17.0 cm in length and 18-77 g in weight. Acanthurus lineatus three individuals, 9.4-17.7 cm in length and 17-96 g in weight. Acanthurus triostegus is seven individuals, 9.3-12.4 cm in length, and weighs 21-55 g. Acanthurus nigricans two individuals each measuring 13.9-13.9 cm in length and weighing 67-70 g each. One individual Ctenochaetus cyanocheilus, a total length of 10.3 cm, and weight of 29 g. Naso lituratus four individuals, length 15.1-17.7 cm and weight ranging from 68-115 g. Naso brevirostris one individual measuring 23.0 cm in length and weighing 186 ...

Research paper thumbnail of Struktur Komunitas Ikan Family Chaetodontidae Sebagai Indikator Kondisi Kesehatan Lingkungan Ekosistem Terumbu Karang DI Zona Tradisional Pulau Bunaken Taman Nasional Bunaken

JURNAL PESISIR DAN LAUT TROPIS, 2021

The presence of coral reef fishes, especially family Chaetodontidae is one of bioindicators to en... more The presence of coral reef fishes, especially family Chaetodontidae is one of bioindicators to environment health condition of coral reef. Fish indicator research in Bunaken Island waters aims to find out the community structure, such as the composition, abundance, density, equality, diversity and dominance. Data collection was conducted at 5 (five) locations in the Bunaken Island Traditional Zone where there are 5 (five) observation points respectively, namely TP-1 Mandolin, TP-2 Alung Banua, TP-3 Sachiko, TP-4 Muka Kampung, and TP-5 Bunaken Timur. Data collection by underwater visual census (UVC) techniques using SCUBA. The results showed there were 23 species of indicator fish from family Chaetodontidae, total individuals number of each species in 5 research sites as many as 97 individuals. The highest fish density is 0.06 at TP-5 while the lowest value in TP-2 with density value 0.02. Through indicator fish community structure indicates that the coral reef quality conditions is ...

Research paper thumbnail of (Editor- in- Chief)

komunikatif dan menarik. Mengingat bahwa kebutuhan untuk berbagi pengalaman dan pengetahuan terus... more komunikatif dan menarik. Mengingat bahwa kebutuhan untuk berbagi pengalaman dan pengetahuan terus meningkat, maka berdasarkan saran-saran dan masukan-masukan yang kami peroleh dari para penelaah dan pembaca, jurnal Pesisir & Lautan akan hadir ke hadapan Anda tiga kali dalam setahun dimulai sejak penerbitan edisi ketiga ini. Semoga jurnal ini dapat menjadi suatu media informasi bagi para pemerhati maupun praktisi pengelolaan sumberdaya pesisir dan lautan. Selamat membaca dan kontribusi Anda kami nantikan. For the third edition of Pesisir & Lautan journal, we have redesigned the format and appearance, in order to make it more attractive and communicative. The need for sharing experience and knowledge is increasing from day to day; hence, in response to many suggestion and inputs from reviewers, readers and subscribers (both domestic and abroad), we have decided that the journal will be published three times a year commencing this edition. We hope that this journal will be more attract...

Research paper thumbnail of Community structure of mangrove in Mantehage Island and Paniki Island, North Sulawesi, Indonesia

Aacl Bioflux, 2019

The determination of mangrove community structure was conducted in Mantehage Island and Paniki Is... more The determination of mangrove community structure was conducted in Mantehage Island and Paniki Island, North Sulawesi, Indonesia. The continous quadrant method was used. This method uses a 10x10 m quadrant as the observation base, an auxiliary line set cut (perpendicular to the coastline) on one part of the mangrove ecosystem as an observation track. A total of 8 different species of mangroves were identified in the study area belonging to Malpighiales (Rhizophoraceae), Myrtales (Lythraceae, Combretaceae) and Sapindales (Meliaceae). The most abundant mangrove species across the thirteen stations is Ceriops tagal with a density of 3,020 individuals per hectare. Species richness index, diversity index, evenness index and dominance index were calculated to determine the diversity of mangroves along the study area. Station 3 obtained the highest species richness and station 6 obtained the lowest species richness. Station 2 recorded the highest diversity and station 6 recorded the lowest...

Research paper thumbnail of Protogynous hermaphroditism in the sand diver Trichonotus filamentosus

NIPPON SUISAN GAKKAISHI, 1991

Sexual patterns of the sand diver Trichonotus filamentosus were studied using specimens collected... more Sexual patterns of the sand diver Trichonotus filamentosus were studied using specimens collected at Hakata Bay, Kyushu, Japan, between 1986-1989. The species was found to be a protogynous hermaphrodite for the following reasons: (1) The males are not only larger in body size than females, but also have a different body form and color, with intermediate types occurring within a range where the male and female sizes overlap. (2) Differences in annuli in otoliths between the sexes suggest that males are older than females. (3) Bisexual gonads occur in 4.58% of the specimens examined histologically. (4) Bisexual gonads and mature testes exhibit secondary structure. The size frequency distributions of the males and females, and the occurrence of specimens with bisexual gonads indicate that the sand diver of Hakata Bay undertakes protogynous sex change at 80-120mm SL, after the spawning season in summer. It has also been found that the present species is monandric, because all males have secondary testes.

Research paper thumbnail of (Editor- in-chief)

Pesisir dan Lautan Indonesia ” kembali hadir dengan perubahan judul, yakni “Pesisir & Lautan”, me... more Pesisir dan Lautan Indonesia ” kembali hadir dengan perubahan judul, yakni “Pesisir & Lautan”, menyusul edisi pertama yang terbit bulan Maret 1998 dengan desain yang lebih menarik. Judul baru tersebut diharapkan akan lebih atraktif dan mudah diingat pembaca. Perubahan judul jurnal ini tidak mengubah tema dan tujuan jurnal, dimana masih membicarakan masalah-masalah yang berkaitan dengan pengelolaan sumberdaya pesisir dan lautan di Indonesia. Penerbitan edisi kedua ini diharapkan akan lebih bermanfaat dan dapat membantu semua kalangan, terutama para pemerhati serta pihak-pihak yang peduli terhadap pelestarian serta pengelolaan sumberdaya pesisir dan lautan, sekaligus dapat berperan sebagai media informasi dalam mengulas permasalahan pengelolaan sumberdaya pesisir dan lautan. Akhirnya saya ucapkan selamat membaca dan kontribusi serta saran-saran anda kami tunggu selalu.

Research paper thumbnail of STRUKTUR KOMUNITAS KARANG DAN BIOTA ASOSIASI PADA KAWASAN TERUMBU KARANG DI PERAIRAN DESA MINANGA KECAMATAN MALALAYANG II DAN DESA MOKUPA KECAMATAN TOMBARIRI. (Coral Structure Community and Its Association Organism In Coral Reef at Minanga Village of Malalayang II and Mokupa Village of Tombariri ...

Research paper thumbnail of 北スラウェシ州の国立自然公園(Bunaken及びTangkoko)における観光現状とエコツーリズムに関する意向調査

日本観光研究学会全国大会学術論文集, Dec 1, 2011

Research paper thumbnail of Study Of Hard Coral (Scleractinia) Recruitment In The Molas Waters, Manado City

Jurnal Ilmiah PLATAX, 2022

Coral recruitment is the entry of new coral individuals into coral reef populations due to reprod... more Coral recruitment is the entry of new coral individuals into coral reef populations due to reproduction or migration. Juvenile coral is the result of metamorphosis and growth of coral planula measuring 5 cm and attached to certain substrates. There are two types of substrates in the waters, stable substrates and unstable substrates such as rubble. The purpose of this study was to study hard coral recruitment, both in terms of density, the composition of juvenile coral colony types, size, and the type of substrate occupied by juvenile corals. This research was conducted in August 2021 in the waters of Molas, Bunaken District, Manado City. The method used for site selection is the purposive sampling method and data collection using a sampling method with quadrant transects. The results showed that the density of coral recruitment at the study site was 8,43 colonies/m2. The percentage of juvenile coral attachment on stable substrates is 90% and 10% on unstable substrates. The average s...

Research paper thumbnail of (Nematocysts of the Scleractinian Coral, Pocillopora eydouxi)

The aims of this research were to know the type, composition, and nematocysts dimension of Sclera... more The aims of this research were to know the type, composition, and nematocysts dimension of Scleractinian Coral, Pocillopora eydouxi. Pocillopora eydouxi that used on this study was collected from Malalayang Beach, Manado. There were two main types of nematocysts found on Pocillopora eydouxi, i.e., holotrichous isorhizas (HI) and microbasic p-mastigophore (MpM). The nematocysts composition showed that HI more abundant than MpM. HI type had capsule length 63,38 ± 11,36 µm (mean ± SD) and capsule width 19,25 ± 4,60 µm (mean ± SD), while MpM had capsule length 27,05 ± 3,68 µm (mean ± SD), capsule width 7,05 ± 1,88 µm (mean ± SD) and shaft length 19,59 ± 4,67 µm (mean ± SD). The results concluded that Pocillopora eydouxi had two major nematocysts, i.e., HI and MpM, therefore, could be recommended to take more advanced study about typically role of both nematocysts type respectively.

Research paper thumbnail of Studies on the Sexual Patterns in Ten Species of Japanese Marine Fishes

Research paper thumbnail of 北スラウエシ州の国立自然公園(Bunaken及びTangkoko)における観光現状とエコツーリズムに関する意向調査

Research paper thumbnail of Research Report on the Current Tourism Conditions and Questionnaire Research on Ecotourism in the National Nature Parks, Bunaken and Tangkoko, in the North Sulawesi, Indonesia

Research paper thumbnail of Foraminifera Bentik Pada Terumbu Karang Pulau Bunaken

JURNAL PESISIR DAN LAUT TROPIS, Jan 15, 2020

Study of benthic foraminifera on the coral reefs of Bunaken Island, North Sulawesi Province, was ... more Study of benthic foraminifera on the coral reefs of Bunaken Island, North Sulawesi Province, was carried out with the aim of providing information regarding the description, distribution and FoRAM Index values on the coral reef environment of Bunaken Island. Sediment sampling in the field was carried out at 5 stations around the island, each area has been plotted on the map, with 3 repetitions and using a SCUBA tool at a depth of 3-8 meters. From observations of sediment surface samples at 15 points in 5 stations spread over Bunaken Island, 5,770 benthic foraminifera specimens have been identified. 81 species from 26 genera of foraminifera were identified and they were then grouped into functional groups to obtain the FoRAM Index. The Index were ranged from 7.18 to 10.5. This indicates that the environment of the coral reef waters around the island is still in good condition.

Research paper thumbnail of Status persentase tutupan karang scleractinia di pulau Bunaken (Taman Nasional Bunaken) dan di pantai Malalayang, pesisir kota Manado

JURNAL PESISIR DAN LAUT TROPIS, 2017

Karang scleractinia atau karang batu merupakan karang pembentuk terumbu. Sehingga penentuan statu... more Karang scleractinia atau karang batu merupakan karang pembentuk terumbu. Sehingga penentuan status kondisi karang batu menjadi bagian penting dan sangat menentukan peran ekologis dan ekonomis ekosistim terumbu karang. Salah satu parameter untuk mengetahui kondisi karang batu yaitu persentase tutupan di alam. Penelitian dilakukan menggunakan metode deskriptif kuantitatif dengan tehnik pengambilan data dengan menggunakan LIT (Line InterceptTransect) yang selanjutnya dianalisis dengan Persentase Tutupan Karang setelah data diolah dengan ‘benthic life form’. Parameter lingkungan berupa salinitas dan suhu air serta kecerahan juga diukur.Hasil penelitian menunjukkan bahwa persentase tutupan di perairan pantai Malalayang Kota Manado dalam status kategori ‘poor’ (Buruk) khususnya di kedalaman 3 dan 5 meter yaitu pada kisaran antara 0-24,9 %, sekalipun pada kedalaman 10 meter hanya kategori ‘good’ (Baik), pada kisaran antara 50 – 69,9 %.. Sedangkan di stasiun penelitian Pulau Bunaken baik ...

Research paper thumbnail of Distribusi Vertikal Karang Batu (Scleractinia) Di Perairan Desa Kalasey, Kabupaten Minahasa

JURNAL PESISIR DAN LAUT TROPIS, 2015

Penelitian ini dilaksanakan dengan tujuan untuk mengetahui struktur komunitas dan distribusi vert... more Penelitian ini dilaksanakan dengan tujuan untuk mengetahui struktur komunitas dan distribusi vertikal karang scleractinia di perairan Desa Kalasey.Jumlah spesies yang ditemukan pada lereng terumbu berjumlah 48 dan pada rataan terumbu 38.Jumlah koloni pada lereng terumbu berjumlah 190 dan pada rataan terumbu 133.Spesies Porites lobata memiliki kepadatan relatif tertinggi pada lereng terumbu dan Favites halicora pada rataan terumbu, masing-masing dengan nilai 20%. Nilai indeks keanekaragaman menunjukkan keanekaragaman tinggi pada lereng terumbu (3,12) dan keanekaragaman sedang pada rataan terumbu (2,95). Secara umum, kedua loaksi tersebut memiliki pola penyebaran seragam. Hasil indeks kemerataan pada lereng terumbu 0,80 dan rataan terumbu 0,81. Kedua nilai tersebut digolongkan pada komunitas yang stabil.

Research paper thumbnail of Struktur komunitas foraminifera benthik berdasarkan habitat di perairan Sulawesi Utara

JURNAL PESISIR DAN LAUT TROPIS, 2017

Penelitian mengenai struktur komunitas foraminifera telah dilakukan di beberapa lokasi di peraira... more Penelitian mengenai struktur komunitas foraminifera telah dilakukan di beberapa lokasi di perairan Sulawesi Utara yang bertujuan untuk mengetahui jenis-jenis foraminifera benthik dan struktur komunitas berupa kepadatan, keanekaragaman, kemerataan dan dominansi. Juga untuk mengetahui pola penyebaran foraminifera secara umum. Pegambilan sampel foraminifera dilakukan di garis pantai di zona intertidal, di beberapa kedalaman, dan juga di ekosistim yang berbeda seperti mangrove, lamun dan terumbu karang. Sampel diambil secara volumetri di Desa Salurang (Stasiun 1), Desa Binebas (Stasiun 2), Desa Bulo (Stasiun 3), Kelurahan Malalayang (Stasiun 4, dan Kelurahan Molas (Stasiun 5). Koordinat dari masing-masing stasiun dicatat mengacu pada tampilan posisi koordinat pada alat GPS (Global Positioning System). Pada setiap titik di tiap stasiun sampel yang terdapat dalam sedimen pasir dan lumpur diambil menggunakan alat keruk sekop dan dimasukkan dalam wadah plastik berlabel ukuran 240 ml. Sampel...

Research paper thumbnail of Protogynous hermaphroditism in the wrasse Choerodon azurio

NIPPON SUISAN GAKKAISHI, 1991

Research paper thumbnail of Study on the seaweeds of Ambon Island, Indonesia

... Ambon Island is located in the Eastern Indonesia at 162 Page 2. Gerung GS et al.: Seaweeds of... more ... Ambon Island is located in the Eastern Indonesia at 162 Page 2. Gerung GS et al.: Seaweeds of Ambon Island, Indonesia 3°33'-3°43'S, 128°0'-128°16'E. The water condition in Ambon Bay is strongly influenced by the physics and biology of the ocean, the island, and the climate. ...

Research paper thumbnail of Meristic And Morfometric Characteristics Of Scad Mackerel Decapterus macarellus (Cuvier, 1833)

Jurnal Ilmiah PLATAX

Fish are cold-blooded vertebrates, whose body movements and balance are mainly using fins, breath... more Fish are cold-blooded vertebrates, whose body movements and balance are mainly using fins, breathing through gills, and living in an aquatic environment. Most vertebrates in the world are fish covering 48.1%, mammals (10.8%), reptiles (14.4%), amphibians (6.0%), and birds (20.7%). One of the fish consumed in North Sulawesi is scad mackerel locally called malalugis. This research focused on the meristic and morphometric characteristics of blue scad. The samples were caught in Makalehi waters and then landed in Manado Bay. Meristic observations (related to the number) included the number of spines and soft dorsal fin, pectoral fin, pelvic fin, anal fin (anal), and caudal fin. There were 9 spines on the first dorsal (D1), 2 spines and 30-37 soft rays on the second dorsal (D2), 3 spines and 24-31 soft rays on the anal fin (A), and 1,327 linea lateralis (LL). The morphometric observations cover total length, standard length, fork length, head length, tail stem length, eye width, body wid...

Research paper thumbnail of Acanthuridae in Bitunuris Waters Talaud Islands

Jurnal Ilmiah PLATAX

This study aims to determine the species of fish from the Acanthuridae family in Bitunuris Villa... more This study aims to determine the species of fish from the Acanthuridae family in Bitunuris Village, Salibabu Island, Talaud Islands Regency. Fish samples were caught using monofilament gill nets with a mesh size of 1.5 inches, net length of 15 m, and net height of 2 m. Sampling was carried out in April and May 2021. A total of 63 individuals were caught consisting of nine species. Acanthurus nigrofuscus 40 individuals, 10.0-17.0 cm in length and 18-77 g in weight. Acanthurus lineatus three individuals, 9.4-17.7 cm in length and 17-96 g in weight. Acanthurus triostegus is seven individuals, 9.3-12.4 cm in length, and weighs 21-55 g. Acanthurus nigricans two individuals each measuring 13.9-13.9 cm in length and weighing 67-70 g each. One individual Ctenochaetus cyanocheilus, a total length of 10.3 cm, and weight of 29 g. Naso lituratus four individuals, length 15.1-17.7 cm and weight ranging from 68-115 g. Naso brevirostris one individual measuring 23.0 cm in length and weighing 186 ...