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REPRODUCTIVE BIOLOGY OF THE YELLOW RASBORA (Rasbora lateristriata) INHABITAT OF THE NGRANCAH RIVER, KULON PROGO REGENCY Djumanto Djumanto; Eko Setyobudi; A. A. Sentosa; N. Nirwati
Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 2 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8904

The purpose of this research was to identify the reproductive biology in the yellow rasbora (Rasbora lateristriata) in habitat of the Ngrancah River. To identify spawning events and embryo development, direct observation was employed during the spawning season in their natural environment, and then fertilized egg was incubated insitu. Spawning seasons underwent correspond to the end of rainy season and early dry season which characterized by clean freshly water and low temperature. The result showed that during spawning season, the broodfish migrated from Sermo Reservoir upward to the main river to find out the spawning site. In the early morning between 03.00 and 05.00 AM, the broodstock moved to the spawning site, then making aggregation and both female and male released their gametes in the shallower place. The aggregations were consisting around of 1 female and 3 males. The fertilized eggs would cleavage, and then embryo developed and yolk sac larval hatched within 23 hours at 27oC. The knowledge about spawning events of yellow rasbora may be used for improved management tools in the future.

Reproduction of Indian Mackerel Rastreliger kanagurta (Cuvier, 1816) in Morodemak Coast Demak Regency Dwi Rachmanto; Djumanto Djumanto; Eko Setyobudi
Jurnal Perikanan Universitas Gadjah Mada Vol 22, No 2 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.48440

Indian mackerel is a group of small pelagic fish that has high economic value and is ecologically important. The catch of Indian mackerel in the Morodemak Coastal Fishing Port of Central Java has decreased within 2016-2018, which is suspected by overexploitation. This study aims to observe the reproduction of Indian mackerel. Fish samples were collected from the catches of the mini purse seine operated by fishermen in April-June 2019. The fish samples were measured their length and weight individually, then the abdomen dissected to collect gonad, and counted in sub-sample of the egg number. Data were analyzed to determine the length-weight relationship of fish, sex ratio, gonad maturity level (GML), gonad maturity index (GMI), the size of the first gonad matured, and the egg number in each gonad brood fish. The results showed a negative allometric length relationship, and the length-weight relation equation in female fish was W = 0.038 L 2.59 and in male was W = 0.178 L 2.03. The value of fish condition factors in males, and females obtained values ranging from 1-2. The proportion of fish in GML III ranges from 27.2 to 82.5%, while GML IV ranges from 3.6 to 33.8%. Fish GMI ranged from 0.17 to 4.75%. The eggs number ranged from 11.235 to 40.878 grain. The female Indian mackerel get the first gonad matured at the size of 15.2 cm.

Karakter Morfometrik dan Meristik Ikan Layang (Decapterus macrosoma Bleeker, 1851) di Pantai Selatan Daerah Istimewa Yogyakarta, Indonesia Rachma Cintya Kusumanigrum; Nahla Alfiatunnisa; Murwantoko Murwantoko; Eko Setyobudi
Jurnal Perikanan Universitas Gadjah Mada Vol 23, No 1 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.52348

Suatu spesies harus memiliki satu taksonomi yang jelas dan disepakati secara global untuk mempermudah para peneliti dalam membahas suatu spesies. Penelitian ini bertujuan untuk mengidentifikasi spesies ikan layang (Decapterus spp.) yang tertangkap di Perairan Daerah Istimewa Yogyakarta secara morfologi, morfometrik, dan meristik. Ikan layang diperoleh dari tangkapan nelayan Sadeng pada bulan Maret-Juni 2019. Sampel yang diambil berjumlah 207 ekor. Identifikasi secara morfologi dilakukan dengan pengukuran 23 karakter truss morfometrik dan 6 karakter meristik. Analisis data morfometrik menggunakan Principal Component Analysis sedangkan data meristik dibandingkan dengan pustaka. Jenis ikan layang yang ditemukan di Perairan Daerah Istimewa Yogyakarta berdasarkan identifikasi morfologi adalah Decapterus macrosoma. Karakter meristik di dapatkan rumus D1 VIII; D2 . I, 31-39; A. II, I, 25-32; P. 22-23; V. 23-30; L1 scute 23-40. Spesies layang yang ditemukan di Perairan Daerah Istimewa Yogyakarta dapat dibedakan secara morfometrik yaitu berdasarkan jarak akhir tulang kepala dengan bawah tutup insang, jarak akhir tulang kepala dengan sirip ventral, jarak sirip dorsal pertama dengan sirip ventral, jarak sirip dorsal pertama dengan sirip anal bagian depan, jarak sirip ventral dengan sirip dorsal kedua bagian depan dan jarak sirip anal bagian belakang dengan anal finlet bagian atas.

Keanekaragaman gastropoda di perairan Teluk Lembar, Nusa Tenggara Barat Nyutriawan Arkan Hafish; Rahmat Kurniawan; Namastra Probosunu; Ratih Ida Adharini; Eko Setyobudi
Jurnal Biologi Udayana Vol 26 No 1 (2022): JURNAL BIOLOGI UDAYANA
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBIOUNUD.2022.v26.i01.p05

Penelitian keanekaragaman gastropoda telah dilakukan di Teluk Lembar yang terletak di sebelah barat daya Pulau Lombok, Nusa Tenggara Barat. Wilayah ini memiliki lingkungan yang unik, yang dicirikan oleh adanya hutan bakau, aktivitas domestik dan lalu lintas transportasi laut. Penelitian ini bertujuan untuk mengetahui keanekaragaman gastropoda di lokasi ini. Penelitian dilakukan pada bulan Juli sampai Agustus 2017. Pengambilan sampel gastropoda dilakukan dengan menggunakan Ekman grab dengan ukuran 12,5 x 20 cm, dari 11 stasiun yang ditentukan berdasarkan kondisi lingkungan. Kualitas air yang terdiri dari suhu, substrat, kedalaman, pH air, salinitas, dan bahan organik, diukur sesuai lokasi stasiun pengambilan sampel. Data gastropoda yang diperoleh dianalisis untuk menentukan indeks kerapatan, keanekaragaman, dan dominasi. Spesies gastropoda berhasil diidentifikasi dari Teluk Lembar yang dikelompokkan menjadi 31 genus dan 21 famili. Clypeomorus purpurastoma, Pirenella asiatica dan Terebralia palustris merupakan spesies yang paling banyak ditemukan dengan jumlah masing-masing 16,76%, 13,8% dan 12,6%. Indeks kerapatan adalah 2.675 ind/m2. Komunitas gastropoda menunjukkan tingkat keanekaragaman yang sedang (H’=1.23) dengan tingkat dominasi yang rendah (D=0.09).

Food Preference of Shortfin Scad (Decapterus macrosoma) at the Southern Waters of Gunungkidul Yogyakarta, Indonesia [Preferensi pakan ikan layang deles (Decapterus macrosoma) di Pantai Selatan Gunungkidul Yogyakarta] Friyuanita Lubis; Ratih Ida Adharini; Eko Setyobudi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13927

AbstractThe food habit is one of the important information used in the fisheries resource management. This study aimed to determine food preferences, index of preponderance, and trophic level of shortfin scad (D. macrosoma) captured from the southern waters of Gunungkidul Yogyakarta, Indonesia. A total of 325 fish samples were collected from March to September 2018. Each fish sample was measured in total length, body weight, determined its sex, and then dissected. The digestive tract was measured in total length then the gut contents were preserved in 5% formaldehyde to observe the type of food composition. The results showed that shortfin scad was carnivorous fish (relative gut length = 0.47) with the diet composing of fish (84.15%), phytoplankton (8.91%), zooplankton (4.47%), and snipping shrimp (3.19%). The molecular identification showed that the main fish species eaten by shortfin scad was Cololabis saira (Scomberesocoidae).AbstrakKebiasaan pakan ikan merupakan salah satu informasi penting yang digunakan dalam manajemen sumberdaya perikanan. Penelitian ini bertujuan untuk mengetahui preferensi pakan, indeks bagian terbesar dan tingkat trofik ikan layang deles (D. macrosoma) yang ditangkap dari Perairan Gunungkidul. Total 325 sampel ikan layang deles dikumpulkan selama bulan Maret sampai dengan September 2018. Setiap sampel ikan diukur panjang total, berat tubuh, ditentukan jenis kelaminnya kemudian dilakukan pembedahan. Saluran pencernaan diukur panjangnya, kemudian isi lambung ikan diawetkan dalam formalin 5% untuk diamati komposisi jenis makanannya. Analisis data meliputi panjang usus relatif, frekuensi kejadian, indeks bagian terbesar, dan tingkat trofik ikan layang deles. Hasil penelitian menunjukkan bahwa ikan layang deles bersifat karnivora (panjang usus relatif = 0,47) dengan komposisi jenis makanan utama adalah ikan (84,15%). Makanan pelengkap layang deles adalah fitoplankton (8,91%), sedangkan zooplankton (4,47%) dan potongan udang (3,19%) merupakan makanan tambahan. Berdasarkan identifikasi molekuler, spesies ikan yang menjadi makanan utama ikan layang deles adalah Cololabis saira (Scomberesocoidae).

Morphometric and Meristic Characterization of Hairtails Trichiurus lepturus Linnaeus, 1758 (Scombriformes: Trichiuridae) from the Northern Coast of Java, Indonesia Adhimas Febri Aryantojati; Murwatoko Murwantoko; Eko Setyobudi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 14 No. 1 (2022): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v14i1.31443

Highlight ResearchThe most significant morphological variation was the snout length and caudal peduncleT. lepturus from the coast of Pati and Cirebon have a high morphometric character resemblance and possibly are members of the same populationT. lepturus in Demak waters formed a separate population group from T. lepturus from the coast of Pati and Cirebon, however still in the same species AbstractHairtails (Trichiurus spp.) are economically important fisheries resources and have become an export commodity. In Indonesia, there are several hairtail species; however, each species distribution is not yet certainly known. This study aimed to identify and determine the morphometric and meristic character of the hairtail from the northern coast of Java, Indonesia. Fish specimens were obtained from fishermen catches in the north coast of Pati and Demak (Central Java) and the northern coast Cirebon (West Java), which captures the fish in less than one-week fishing operation. Fish samples were grouped based on morphological similarities identified in previously published works. After that, 22 morphometric and four meristic characters were measured and counted. Principal Component Analysis and Discriminant Analysis were used to analyze morphometric data, while the meristic data were compared to the available published works. The hairtail caught at the northern coast of Java was long, flat, silvery in color, and had a sagittal crest, with the fin formula being D.III.125-134, P.I.10, and A.I.98-104. According to the morphological and meristic characters, the hairtail caught at Java's northern coast was identified as Trichiurus lepturus. The most significant morphological variation was the snout length and caudal peduncle. The PCA and scattergram analyses showed that T. lepturus from the coast of Pati and Cirebon have a high morphometric character resemblance and possibly are members of the same population. T. lepturus in Demak waters formed a separate population group from T. lepturus from the coast of Pati and Cirebon, however still in the same species.

Record of Acanthocephala on Shortfin Scad (Decapterus macrosoma Bleeker, 1851) from the Southern Coast of the Special Region of Yogyakarta, Indonesia Kolokaring, Priscilla Yolanda Pramesti; Syarifah, Rizka Fauziana; Hidayat, Hanindya Fairuzia; Astuti, Niken; Murwantoko, Murwantoko; Setyobudi, Eko
Journal Omni-Akuatika Vol 21, No 1 (2025): Omni-Akuatika May (in progress)
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2025.21.1.1215

Acanthocephala is a parasite commonly found in the digestive tract of fish. This study aimed to determine the prevalence and mean intensity of Acanthocephala infecting the shortfin scad (Decapterus macrosoma) caught from the southern coast of Yogyakarta and to identify those parasites by morphological approach. A total of 221 samples of fish were obtained from local fishermen operating in fishing grounds along the southern coast of the Indian Ocean in the Special Region of Yogyakarta. The fish samples were measured for total length (TL) and weight and dissected to examine for the presence of Acanthocephala. Parasite samples were collected from the digestive tract of shortfin scad and preserved in absolute ethanol for further identification. Data analysis focused on calculating prevalence and mean intensity of infection. The results showed that the prevalence of Acanthocephala infection was 16.3%, with a mean intensity of 1.9 larvae/host. Both the prevalence and the mean intensity tended to increase with increasing fish length. Most of the shortfin scad (75%) was infected with Acanthocephala at a relatively low intensity (1-2 larvae/host). The highest intensity of Acanthocephala infection was 13 larvae/host and was only found in one fish. Morphological identification indicated that the genus infecting shortfin scad was Acanthocephalus (Koelreuther, 1771).Keywords: Acanthocephalus, biological tag, morphology, parasite, prevalence

Investigation of anisakis infection and allergic potential on largehead hairtail (Trichiurus lepturus) from south coast of Yogyakarta Indonesia Prima Putra, Masagus Muhammad; Busyro, Ihda Khozainul; Puspita, Indun Dewi; Setyobudi, Eko
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 3 (2025): SEPTEMBER 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.3.45035

Anisakis spp. are parasites distributed worldwide that often infect marine fish species. This study investigated the prevalence, mean intensity, and Anisakis larvae species, and identified the allergenic potential of T. lepturus caught in the southern coasts of Yogyakarta, Indonesia. In total, 50 fish that were caught by the fishermen were measured for length and weight and examined for Anisakis larvae infection. The results showed that larvae were found in the abdominal cavity (87.03%), organs (7.95%), gonads (2.93%), and digestive systems (2.09%). The prevalence of Anisakis infection was high (64%), with a mean intensity of 7.47 larvae/fish. Molecular analysis revealed that the nematode was Anisakis typica. Therefore, it poses a potential health risk to humans. Consuming fish infected with Anisakis can cause allergic reactions even after the fish has been cooked. The identification was done through protein profile antigen detection of fish flesh, both infected and non-infected, using SDS-PAGE. In this study, the heating process was applied (60, 90, and 120) for 15 minutes. The result of allergenic potential detection from T. lepturus infected by Anisakis showed four protein bands correlated with Anisakis allergens Ani s 1 (24 kDa), Ani s 2 (97 kDa), Ani s 3 (41 kDa), and Ani s 7 (139 kDa) in all the infected fish, both fresh and processed.Keywords:AnisakisAllergenInfectionIntensityPrevalence

Investigation of anisakis infection and allergic potential on largehead hairtail (Trichiurus lepturus) from south coast of Yogyakarta Indonesia Prima Putra, Masagus Muhammad; Busyro, Ihda Khozainul; Puspita, Indun Dewi; Setyobudi, Eko
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 3 (2025): SEPTEMBER 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.3.45035

Anisakis spp. are parasites distributed worldwide that often infect marine fish species. This study investigated the prevalence, mean intensity, and Anisakis larvae species, and identified the allergenic potential of T. lepturus caught in the southern coasts of Yogyakarta, Indonesia. In total, 50 fish that were caught by the fishermen were measured for length and weight and examined for Anisakis larvae infection. The results showed that larvae were found in the abdominal cavity (87.03%), organs (7.95%), gonads (2.93%), and digestive systems (2.09%). The prevalence of Anisakis infection was high (64%), with a mean intensity of 7.47 larvae/fish. Molecular analysis revealed that the nematode was Anisakis typica. Therefore, it poses a potential health risk to humans. Consuming fish infected with Anisakis can cause allergic reactions even after the fish has been cooked. The identification was done through protein profile antigen detection of fish flesh, both infected and non-infected, using SDS-PAGE. In this study, the heating process was applied (60, 90, and 120) for 15 minutes. The result of allergenic potential detection from T. lepturus infected by Anisakis showed four protein bands correlated with Anisakis allergens Ani s 1 (24 kDa), Ani s 2 (97 kDa), Ani s 3 (41 kDa), and Ani s 7 (139 kDa) in all the infected fish, both fresh and processed.Keywords:AnisakisAllergenInfectionIntensityPrevalence

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