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INDONESIA
Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology)
Published by Masyarakat Iktiologi Indonesia
ISSN : 16930339     EISSN : 25798634     DOI : https://doi.org/10.32491
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Aims and Scope Aims: Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology) aims to publish original research results on fishes (pisces) in fresh, brackish and sea waters including biology, physiology, and ecology, and their application in the fields of fishing, aquaculture, fisheries management, and conservation. Scope: This journal publishes high-quality articles dedicated to all aspects Aquaculture, Fish biodiversity, Fisheries management, Fish diseases, Fishery biotecnology, Moleculer genetics, Fish health management, Fish biodiversity.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 420 Documents
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Ichthyofauna of Alas River, around Soraya Research Station, Leuser Ecosystem Area, Subulussalam, Aceh Furqan Maghfiriadi; Ilham Zulfahmi; Epa Paujiah; M. Ali Sarong
Jurnal Iktiologi Indonesia Vol 19 No 3 (2019): October 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i3.502

Abstract

The ichthyofaunal study is needed to reveal the diversity of fish, investigate the existence of native and introduced fish, inventory some species that are potential as consumed and ornamental fishes, and to be a part of the effort to find new species. This study aimed to determine the composition of freshwater fish in the Alas River around Soraya Research Station, Leuser Ecosystem Area, Subulussalam, Aceh. Research was conducted from July to September 2018. Fish sampling was carried out at six research stations using selective gill nets, throwing net, hook, tray net, and scoop net. A total of 339 individual’s fish belonging to 20 species, eight families and three orders was collected from sampling location. Cyprinidae was the predominant family found in the Alas River. As many of 16 fish species has the potential as consumption fish. Two introduced fishes were collected, namely tilapia (Oreochromis niloticus) and Amazon sailfin catfish (Pterygoplichthys pardalis). One fish species is thought to have the potential as a new species, i.e. catfish (Hemibagrus sp.). The result of this study can be used as a basic data for policy decision making in order to develop management program of Leuser ecosystem in the future. Abstrak Kajian iktiofauna diperlukan dalam rangka mengungkap keanekaragaman ikan, investigasi keberadaan ikan asli dan ikan asing, inventarisasi jenis-jenis ikan yang berpotensi sebagai ikan konsumsi dan hias, serta menjadi bagian dari upaya menemukan ikan jenis baru. Penelitian ini bertujuan untuk mengkaji komposisi ikan air tawar di Sungai Alas sekitar Stasiun Penelitian Soraya, Kawasan Ekosistem Leuser, Subulussalam, Aceh. Penelitian ini dilakukan mulai Juli hingga September 2018. Pengambilan contoh ikan dilakukan di enam stasiun penelitian dengan menggunakan alat tangkap berupa jaring insang, jala, pancing, serok dan sudu. Sebanyak 339 individu ikan yang tergolong kedalam 20 jenis, delapan famili dan tiga ordo berhasil dikoleksi selama penelitian. Cyprinidae merupakan famili ikan yang paling banyak ditemukan. Enam belas jenis ikan yang dikoleksi berpotensi dijadikan sebagai ikan konsumsi. Ikan asing yang ditemukan berjumlah dua jenis yaitu ikan nila (Oreochromis niloticus) dan ikan sapu-sapu (Pterygoplich-thys pardalis). Terdapat satu jenis ikan yang diduga berpotensi sebagai ikan jenis baru yaitu sing-sing (Hemibagrus sp.). Hasil penelitian ini berpotensi dimanfaatkan sebagai data dasar dalam rangka pengambilan kebijakan pengelo-laan Kawasan Ekosistem Leuser di masa mendatang.
Reproductive biology of sailfin molly, Poecilia latipinna (Lesueur, 1821) in tambak Bosowa Kabupaten Maros Andi Tamsil; Hasnidar Hasnidar
Jurnal Iktiologi Indonesia Vol 19 No 3 (2019): October 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i3.503

Abstract

Sailfin molly, Poecilia latipinna is one of the alien ornamental fishes in Indonesia. This fish has been found in the aquaculture area in Maros Regency, south Sulawesi as a pest. The research aimed to identify species and observe aspects of reproductive biology of sailfin molly. The study was conducted in the Bosowa Isuma aquaculture area, in Maros Regency from November 2017 to April 2018. Fish was captured using a gillnet. The catches were separated for fish identifying and reproductive biology purposes. For the observation of reproductive biology, the samples were separated by sex according to external morphology. Measurement of total length and weight using calliper (mm) and analytical scales (g), respectively. The gonads preserved in the 4% formalin solution, used for determination of gonad developmental stages and fecundity. Identification results showed that the molly fish found in the ponds was Poecilia latipinna (Lesueur 1821). The length distribution of male and female fish was 26-76 and 31-66 mm with a mean of 51 and 46 mm, respectively. Overall, sex ratio and mature gonads between male and female fish were 1: 2 and 1:10; the growth patterns of male and female were negative allometrics and isometric, respectively. This fish is spawn throughout the year with the peak of spawning in January. The number of larvae to be born (larval fecundity) ranges from 12-111 individuals with an average of ± 32 larva/female. Abstrak Ikan molly, Poecilia latipinna adalah salah satu ikan hias asing di Indonesia. Ikan ini telah ditemukan masuk di areal pertambakan di Kabupaten Maros Sulawesi Selatan sebagai hama. Penelitian bertujuan untuk mengidentifikasi spesies dan mengamati aspek biologi reproduksinya. Penelitian berlangsung dari November 2017-April 2018 di areal pertambakan Bosowa Isuma Kabupaten Maros. Pengambilan sampel menggunakan jaring insang. Sampel dipisahkan untuk tujuan identifikasi dan pengamatan biologi reproduksinya. Untuk pengamatan biologi reproduksi sampel dipi-sahkan berdasarkan jenis kelamin dengan mengamati morfologi tubuh. Pengukuran panjang total menggunakan mis-tar geser dan penimbangan bobot dengan timbangan analitik. Gonad diawetkan dalam larutan formalin 4% digunakan untuk penentuan tingkat kematangan gonad dan fekunditas. Hasil identifikasi menunjukkan bahwa ikan molly yang ditemukan adalah jenis Poecilia latipinna (Lesueur 1821). Sebaran ukuran panjang ikan jantan dan betina adalah 26-76 dan 31-66 mm dengan rataan 51 dan 46 mm. Nisbah kelamin secara keseluruhan dan yang matang gonad (TKG IV) antara ikan jantan dan betina adalah 1 : 2 dan 1 : 10; pola pertumbuhan jantan dan betina adalah allometrik negatif dan isometrik; memijah sepanjang tahun dengan puncak pemijahan pada bulan Januari. Jumlah larva yang akan dila-hirkan (larval fecundity) berkisar 12-111 ekor dengan rata-rata ± 32 ekor larva/induk.
Performance evaluation of micro bubble generator on physiological response of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) farmed at different densities in recirculating aquaculture system Sri Wahyuni Firman; Kukuh Nirmala; Eddy Supriyono; Nurul Taufiqu Taufiqu Rochman
Jurnal Iktiologi Indonesia Vol 19 No 3 (2019): October 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i3.504

Abstract

Micro-bubble generator is a device to maintain water quality by producing micron-sized bubbles. This study aims to evaluate the application of micro-bubble generator in different density on production performance and physiological response of nile tilapia reared in recirculating system. An experiment was designated by performing 3 densities, namely 15 , 30, and 45 individuals 60 L-1 with 3 replications. Every single unit of experiment applies a 34×42×41 cm3 maintenance container. The length size of fish used in this study was 7.44±2.89 cm and body weight of 10,96 ± 0,53 g. Fish were reared for 42 days in recirculation water system and fed ad satiation. The results of the evaluation of the physiological response showed that fish kept at density up to 45 60 L-1 did not show any changes, indicating that fish was in stress condition. The best production performance was in treatment A (15 individuals 60 L-1) with a specific growth rate of 1.87 ± 0.15% and a feed conversion ratio of 0.95 ± 0.08. Abstrak Pembangkit gelembung mikro merupakan suatu alat yang dapat menghasilkan gelembung udara berukuran mikro. Penelitian ini bertujuan untuk mengevaluasi penggunaan pembangkit gelembung mikro pada kepadatan yang berbeda terhadap performa produksi dan respons fisiologis ikan nila yang dipelihara dalam sistem resirkulasi. Penelitian ini dilakukan dengan metode eksperimental dengan tiga perlakuan kepadatan yaitu 15 ekor, 30 ekor dan 45 ekor 60 L-1 yang diulang sebanyak tiga kali. Wadah pemeliharaan berukuran 34×42×41 cm3. Ukuran ikan yang digunakan dalam penelitian ini memiliki panjang 7,44±2,89 cm, serta bobot 10,96±0,53 g. Aplikasi pembangkit gelembung mikro dibe-rikan pada awal hingga akhir pemeliharaan selama 42 hari dengan sistem resirkulasi dan ikan diberi pakan secara ad satiation. Hasil evaluasi terhadap respons fisiologis menunjukkan bahwa ikan yang dipelihara hingga kepadatan 45 ekor 60 L-1 tidak menunjukkan adanya perubahan yang mengindikasikan ikan mengalami stress. Performa produksi terbaik adalah pada perlakuan A (15 ekor 60 L-1) dengan laju pertumbuhan spesifik 1,87±0,15% dan nisbah konversi pakan 0,95±0,08.
Trophic ecology of fish community at Nimbai Stream: Competition and predation interaction to Arfak rainbowfish, Melanotaenia arfakensis Allen, 1990 Emmanuel Manangkalangi; M. Fadjar Rahardjo; Renny K Hadiaty; Sigid Hariyadi; Charles P. H. Simanjuntak
Jurnal Iktiologi Indonesia Vol 19 No 3 (2019): October 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i3.505

Abstract

Information on trophic ecology can provide an understanding of the functional role of fish in an ecosystem, including endemic and native fish groups, as well as alien fish that are introduced through anthropogenic activities. The research on the trophic ecology of the fish community in the Nimbai Stream, Prafi River system, is intended to describe the interaction of competition and predation, especially towards endemic fish, Melanotaenia arfakensis. Fish samples were collected monthly from four habitat types, i.e., slow littoral, medium littoral, pool, and run from May 2016 to April 2017. A combination of an electric shocker and a hand net was used to collect fish samples. A total of 16 fish species were collected, consists of one endemic species, namely M. arfakensis, nine species of native fish, and six species of alien fish. The Arfak rainbowfish and three native fish species were categorized as insectivorous, four native fish species as herbivorous, and two other fishes as carnivorous. Three alien fish species also belong to insectivorous, two alien fish species as carnivorous, and one species as herbivorous. The niche breadth of fish communities ranges from 0.071 to 0.857. The trophic niche overlap between the Arfak rainbowfish and three native fish species and three alien fish species was recorded. The results of this study indicate a potential competition and predation interactions between Arfak rainbowfish and native fish as well as with alien fish species. Therefore, introducing alien fish into Prafi River system will disrupt Arfak rainbowfish population. Abstrak Informasi mengenai ekologi trofik dapat memberikan pemahaman tentang peran fungsional ikan dalam suatu ekosis-tem, termasuk pada kelompok ikan endemik, ikan asli, maupun ikan asing yang dimasukkan melalui aktivitas antro-pogenik. Penelitian mengenai ekologi trofik komunitas ikan di Sungai Nimbai, sistem Sungai Prafi, bertujuan untuk mendeskripsikan interaksi kompetisi dan pemangsaan, khususnya terhadap ikan endemik, Melanotaenia arfakensis. Contoh ikan dikumpulkan setiap bulan dari Mei 2016-April 2017 di empat tipe habitat yakni tepi aliran lambat, tepi aliran sedang, lubuk, dan aliran deras. Kombinasi alat electric shocker dan hand net digunakan untuk mengumpulkan contoh ikan. Sebanyak 16 spesies ikan berhasil dikumpulkan yang terdiri atas satu jenis ikan endemik (M. arfakensis), sembilan jenis ikan asli, dan enam jenis ikan asing. Ikan pelangi arfak dan tiga jenis ikan asli termasuk insektivora, empat jenis ikan asli adalah ikan herbivora, dan dua jenis ikan asli lainnya termasuk ikan karnivora. Tiga spesies ikan asing juga termasuk ikan insektivora, dua jenis ikan asing adalah ikan karnivora, dan satu spesies ikan asing lainnya adalah ikan herbivora. Luas relung komunitas ikan berkisar di antara 0,071-0,857. Tumpang tindih relung makanan ditemukan antara ikan pelangi arfak dengan tiga spesies ikan asli serta tiga spesies ikan asing. Hasil penelitian ini menunjukkan adanya potensi interaksi kompetisi dan pemangsaan antara ikan pelangi arfak dan ikan asli serta dengan ikan asing. Introduksi ikan asing ke dalam sistem Sungai Prafi ditengarai akan mengganggu populasi ikan pelangi arfak.
DNA barcoding application of garfish (Hemirhampus sp.) in North Maluku Sea M. Janib Achmad; Martini Djamhur; M. Abjan Fabanyo; Nebuchadnezzar Akbar
Jurnal Iktiologi Indonesia Vol 19 No 3 (2019): October 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i3.506

Abstract

The purpose of this study was to identify the species of garfish in the waters of north Maluku by applying DNA bar-coding techniques. The method used in the study was the primary design of DNA extraction and isolation, and DNA amplification through polymerase chain reaction. The results showed that Gen Cyt b analysis amplified ± 350 bp amplicon and for the alignment analysis showed that the amplification sample sequence had similarity with the Cyt b gene sequence of Hemiramphus balao with value of 97%. Sequence analysis showed that the six specimens had very low genetic distances. It can be concluded that the isolate samples of garfish have a very close kinship. Abstrak Penelitian ini bertujuan untuk mengidentifikasi spesies ikan julung-julung (Hemirhampus sp.) di perairan Maluku Utara melalui aplikasi DNA barcoding. Metode yang digunakan dalam penelitian adalah desain primer, ekstraksi dan isolasi DNA serta amplifikasi DNA dengan PCR. Hasil penelitian menunjukkan bahwa analisis gen Cyt b yang diamplifikasi diperoleh amplikon sebesar 350 bp, dan analisis penyejajaran menunjukkan bahwa sekuen sampel amplikon memiliki similaritas dengan sekuen gen Cyt b isolat Hemiramphus balao sebesar 97%. Analisis lanjut me-nunjukkan bahwa keenam sampel memiliki jarak genetik yang tergolong sangat rendah. Dapat disimpulkan bahwa sampel isolat ikan julung-julung dalam penelitian ini masih memiliki hubungan kekerabatan yang sangat dekat.
Microplastics abundance in four different species of commercial fishes in Bali Strait Dara Sarasita; Agung Yunanto; Defri Yona
Jurnal Iktiologi Indonesia Vol 20 No 1 (2020): February 2020
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v20i1.508

Abstract

Plastic wastes in marine environment will be degraded for long period of time to become microplastics. The small size of microplastics could be ingested by marine species which has lead to harmful impacts not only to the marine species but also to human. This research aimed to investigate microplastics ingestion in four commercial fishes in the Bali Strait, namely largehead hairtail (Trichiurus lepturus), Indian scad (Decapterus ruselli), Bali sardinella (Sardinella lemuru), and Indian mackerel (Rastrelliger kanagurta). Thirty fish samples from each species of fishes were obtained from the fishermen. Microplastics contents were identified visually using microscope from the gastrointestinal tracks of the fish and polymer of microplastics were identified using Fourier Transform Infra-Red (FTIR) test. The results showed that three types of microplastics (fiber, film and fragment) were found in the four species of fishes with different total abundances. The highest abundance was found in Bali sardine (7.03±0.49 particle individual-1), followed by Indian mackerel (5.03±0.50 particle individual-1), Indian scad (4.23±0.38 particle individual-1) and largehead hairtail (3.83±0.50 particle individual-1). FTIR test showed that polymer types of microplastic found were polyvinyl chloride (PVC), polyamide (PA), polycarbonate (PC), dan polyethylene (PE). Abstrak Sampah plastik dalam lingkungan laut akan terdegradasi dalam waktu yang sangat lama hingga menjadi mikroplastik. Ukuran mikroplastik yang sangat kecil dapat termakan oleh ikan dan membahayakan tidak hanya bagi ikan tersebut namun juga bagi manusia yang mengonsumsinya. Tujuan penelitian ini adalah untuk menganalisis keberadaan mikroplastik pada empat ikan ekonomis penting di perairan Selat Bali yaitu ikan layur (Trichiurus lepturus), layang (Decapterus russelli), lemuru (Sardinella lemuru) dan kembung (Rastrelliger kanagurta). Sebanyak 30 ekor ikan setiap spesiesnya didapatkan dari hasil tangkapan nelayan di Perairan Selat Bali pada Bulan Mei 2018. Kandungan mikroplastik pada saluran pencernaan ikan diidentifikasi jenisnya secara visual dan dengan menggunakan mikroskop serta uji Fourier Transform Infra-Red (FTIR) dilakukan untuk mengetahui polimer dari partikel mikroplastik tersebut. Terdapat tiga jenis mikroplastik yang ditemukan (film, fiber, dan fragmen) pada empat spesies ikan tersebut dengan kelimpahan jenis dan kelimpahan total yang berbeda-beda. Kelimpahan total mikroplastik tertinggi ditemukan pada ikan lemuru (7,03±0,49 partikel individu-1) diikuti oleh ikan kembung (5,03±0,50 partikel individu-1), ikan layang (4,23±0,38 partikel individu-1) dan ikan layur (3,83±0,50 partikel individu-1). Hasil uji FTIR menunjukkan sampel mikroplastik yang ditemukan terdiri dari beberapa polimer seperti polyvinyl chloride (PVC), polyamide (PA), polycarbonate (PC), dan polyethylene (PE).
Species composition and size distribution of sharks and rays caught in Bali Strait and its surrounding area and its relation to fisheries management Selvia Oktaviyani; Wanwan Kurniawan; Fahmi Fahmi
Jurnal Iktiologi Indonesia Vol 20 No 1 (2020): February 2020
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v20i1.509

Abstract

Muncar is one of the shark production centers in Java, where the fishing ground in Bali Strait and its surrounding area. Routine data collection was carried out from May 2018 to April 2019 at the Brak Fish Market and the Muncar Coastal Fishing Port (PPP), Banyuwangi to determine the species composition and size distribution of sharks and rays caught in Bali Strait and its surrounding area. Data collection was done by census and almost of all individuals were identified to species level and and measured. During the study, 3.551 individuals of sharks and rays were landed in this port, consisting of 75 species from 25 families (48 species of sharks, one species of ghost shark and 26 rays species). The most common types of sharks belong to Carcharhinidae and for the rays was Dasyatidae. Among these, thirteen species were listed in Appendix II CITES, i.e. Carcharhinus falciformis, Alopias pelagicus, A. superciliosus, Isurus oxyrhinchus, I. paucus, Sphyrna lewini, S. zygaena, Mobula mobular, M. tarapacana, M. thrustoni, Glaucostegus typus, Rhynchobatus australiae and Rhyna ancylostoma. Most of sharks and rays caught were juvenile to adolescent and at immature or maturing stages. Abstrak Muncar merupakan salah satu sentra produksi hiu di Pulau Jawa dengan daerah tangkapan di perairan Selat Bali dan sekitarnya. Pendataan secara rutin terhadap hasil tangkapan hiu dan pari dilakukan sejak Bulan Mei 2018 hingga April 2019 di Pasar Ikan Brak dan Pelabuhan Perikanan Pantai (PPP) Muncar, Banyuwangi untuk mengetahui kom-posisi spesies dan distribusi ukuran hiu dan pari yang tertangkap dari perairan Selat Bali dan sekitarnya. Pengumpulan data dilakukan secara sensus dan hampir seluruh individu diidentifikasi sampai tingkat spesies serta diukur. Tercatat 3.551 individu hiu dan pari yang didaratkan di wilayah tersebut selama kurun waktu penelitian, yang terdiri atas 75 spesies dan 25 famili (49 spesies hiu dan 26 spesies pari). Spesies hiu yang paling umum ditangkap berasal dari famili Carcharhinidae, sedangkan kelompok pari didominasi oleh famili Dasyatidae. Tercatat ada 13 spesies hiu dan pari Apendiks II CITES yang ditangkap oleh nelayan Muncar, yaitu Carcharhinus falciformis, Alopias pelagicus, A. superciliosus, Isurus oxyrinchus, I. paucus, Sphyrna lewini, S. zygaena, Mobula mobular, M. tarapacana, M. thrustoni, Glaucostegus typus, Rhynchobatus australiae dan Rhina ancylostoma. Sebagian besar hiu dan pari yang ditangkap nelayan berada pada ukuran yuwana hingga remaja, yang belum matang kelamin atau sedang menuju dewasa.
Production of albino slayer through a combination of crossing in brushmouth (Hypostomus plecostomus, Linnaeus 1758) ornamental fish Ahmad Teduh; Dinar Tri Soelistyowati; Odang Carman; Harton Arfah
Jurnal Iktiologi Indonesia Vol 20 No 1 (2020): February 2020
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v20i1.510

Abstract

The objectives of this research was to evaluate the inheritance of albino slayer phenotype in brushmouth (Hypostomus plecostomus, Linn 1758) through the crosses and reproduction performance. The crossing scheme consisted of reciprocal crosses between albino slayer and albino non slayer (SN, NS) and between albino slayer (SS), each spawning in pairs (1:1) with three replications and twice spawning. The fish used in this study were brushmouth fish (Hypostomus sp.) albino Slayer males 9.07 ± 0.5 cm, albino slayer females 8.96 ± 0.4 cm, albino non slayer males 8.87 ± 0.17 cm, and albino non slayer female 8.86 ± 0.16 cm. Slayer phenotype category was identified based on the caudal length fin with 4.43 ± 0.64 cm. Parameters determined included the phenotype distribution of albino slayer, total number of eggs, fertilization rate, hatching rate and survival rate. The results showed that all crossing schemes produced four phenotypes classes including normal slayer, normal non slayer, albino slayer and albino non slayer. The slayer phenotype of albino brushmouth was highest percentage (75%) in crossing with male albino slayer (SN, SS) and highest number of eggs, while the reciprocal crossing with female albino slayer (NS) produced albino slayer 55% and lower egg count. The ratio of tail fin length to body length in albino slayer phenotype was lower than normal phenotype of broom fish. The fertilization and hatching rates were not significantly different in all crosses; however the number of eggs decreased in the second spawning. The similar phenotype cross between albino slayer phenotypes (SS) resulted the best average of survival rate (92%). Abstrak Muncar merupakan salah satu sentra produksi hiu di Pulau Jawa dengan daerah tangkapan di perairan Selat Bali dan sekitarnya. Pendataan secara rutin terhadap hasil tangkapan hiu dan pari dilakukan sejak Bulan Mei 2018 hingga April 2019 di Pasar Ikan Brak dan Pelabuhan Perikanan Pantai (PPP) Muncar, Banyuwangi untuk mengetahui kom-posisi spesies dan distribusi ukuran hiu dan pari yang tertangkap dari perairan Selat Bali dan sekitarnya. Pengumpulan data dilakukan secara sensus dan hampir seluruh individu diidentifikasi sampai tingkat spesies serta diukur. Tercatat 3.551 individu hiu dan pari yang didaratkan di wilayah tersebut selama kurun waktu penelitian, yang terdiri atas 75 spesies dan 25 famili (49 spesies hiu dan 26 spesies pari). Spesies hiu yang paling umum ditangkap berasal dari famili Carcharhinidae, sedangkan kelompok pari didominasi oleh famili Dasyatidae. Tercatat ada 13 spesies hiu dan pari Apendiks II CITES yang ditangkap oleh nelayan Muncar, yaitu Carcharhinus falciformis, Alopias pelagicus, A. superciliosus, Isurus oxyrinchus, I. paucus, Sphyrna lewini, S. zygaena, Mobula mobular, M. tarapacana, M. thrustoni, Glaucostegus typus, Rhynchobatus australiae dan Rhina ancylostoma. Sebagian besar hiu dan pari yang ditangkap nelayan berada pada ukuran yuwana hingga remaja, yang belum matang kelamin atau sedang menuju dewasa.
Records of the rare deep-sea threetooth puffer fish, Triodon macropterus (Tetraodontiformes: Triodontidae) from Molucca and Sawu seas, Indonesia Kunto Wibowo; Miftahul Huda; Rachmad Sholeh Wicaksono; Monica Bataona; Teguh Peristiwady
Jurnal Iktiologi Indonesia Vol 20 No 1 (2020): February 2020
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v20i1.511

Abstract

The Indo-West Pacific species of rare deep-sea threetooth puffer fish, Triodon macropterus Lesson 1931 was recorded on the basis of two voucher specimens from southern coasts of Lembeh Island, North Sulawesi, Molucca Sea and Solor Island, Sawu Sea and a photograph of fresh individual after captured from Sawu Sea. In Indonesia waters, the species has previously been known only from Banda Sea, thus the specimens and a photograph in this study represent the first records of T. macropterus from Molucca Sea and Sawu Sea. Abstrak Spesies ikan langka laut dalam Triodon macropterus Lesson 1831 yang mempunyai distribusi di perairan Indo Pasifik Barat, dijumpai di perairan lepas pantai selatan Pulau Lembeh, Sulawesi Utara, Laut Maluku dan lepas pantai selatan Pulau Solor, Laut Sawu, Indonesia berdasarkan identifikasi dari dua koleksi ilmiah spesimen dan sebuah foto individu sesaat setelah tertangkap. Di perairan Indonesia, spesies ini sebelumnya hanya diketahui tercatat dari Laut Banda, sehingga spesimen dari selatan Pulau Lembeh dan selatan Pulau Solor serta koleksi foto dalam studi ini merupakan catatan pertama distribusi T. macropterus dari Laut Maluku dan Laut Sawu.
Reproduction aspect of green swordtail, Xiphophorus hellerii Heckel 1848 in Tamblingan Lake, Bali I Nyoman Yoga Parawangsa; M. Fadjar Rahardjo; Charles P. H. Simanjuntak
Jurnal Iktiologi Indonesia Vol 20 No 1 (2020): February 2020
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v20i1.512

Abstract

Eco-biological information of green swordtail in Tamblingan Lake is unknown. This research aimed to reveal sex ratio, gonadosomatic index, viviparity, spawning time and location of green swordtail in Tamblingan Lake. Fish was collected by gill nets with a mesh size of 0.5 and 1.0 cm in five sampling stations from January to June 2019. Total length and body weight of all fish samples were measured then dissected to observe the level of gonad maturity and viviparity in female fish. A total of 373 green swordtail with total length ranged and body weight ranged from 30.4-69.2 mm and 0.7935 – 7.6612 g, respectively. The results showed that males outnumberd of females in all sampling periods. Gonadosomatic index of male and female ranged from 0.159-1.239 and 0.204-13.592, respectively. The mature individuals were captured in all sampling stations and observation times. This species has a good reproductive potential with viviparity ranges between 6-54 juveniles. Abstrak Informasi ekobiologi ikan ekor pedang di Danau Tamblingan belum pernah ada. Penelitian ini bertujuan mengungkap nisbah kelamin, indeks kematangan gonad, viviparitas serta waktu dan lokasi pemijahan ikan ekor pedang di Danau Tamblingan. Ikan ditangkap menggunakan jaring insang dengan ukuran mata jaring 0,5 dan 1,0 cm di lima stasiun pengambilan contoh dari bulan Januari-Juni 2019. Seluruh contoh ikan diukur panjang dan ditimbang bobotnya lalu dibedah untuk melakukan pengamatan terhadap tingkat kematangan gonad serta jumlah telur pada ikan betina. Sebanyak 373 ikan ekor pedang ditemukan selama penelitian dengan kisaran panjang total 30,4-69,2 mm dan bobot 0,7935 - 7,6612 g. Hasil analisis menunjukkan bahwa proporsi jumlah ikan jantan lebih banyak daripada ikan betina pada setiap bulan pengamatan. Indeks kematangan gonad ikan jantan berkisar antara 0,155-1,239 dan ikan betina antara 0,203-13,592 . Ikan yang matang gonad ditemukan di seluruh stasiun pengambilan contoh pada setiap bulan pengamatan. Ikan ini memiliki potensi reproduksi yang baik dengan viviparitas antara 6-54 anak.

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