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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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Sizing and scarring of whale shark (Rhincodon typus Smith, 1828) in the Cenderawasih Bay National Park Yusup A Jentewo; Roni Bawole; Tresia S Tururaja; Mudjirahayu Mudjirahayu; Zeth Parinding; Hendrikus R Siga; Muhammad Dailami; Abdul Hamid A Toha
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.587

Abstract

This study aims to determine the total length and scar condition of the body of whale sharks (Rhincodon typus) in Cendrawasih Bay National Park (TNTC), Papua-Indonesia. Photo-identification was used to identify individuals of the whale shark R. typus based on spot patterns behind the last gill slit of each individual. Photo-identification was also used to determine the scar of the whale shark. The total length of whale sharks were estimated based on the length of a snorkeller (assumed to be 1.6 m) swimming alongside the whale shark. We identified 21 individuals of R. typus. Of these 21 individuals, 14 were new sightings and seven were re-sightings that have been recorded in the previous photo collection database. R. typus ranged in size from 2 to 5 m total length (average 3.78 m, ±0,86, N= 21). Based on their size, all individuals of whale shark were categorized as juvenile. 52% of R. typus identified had scars and 38 % were not and 10% were unknown. The majority of whale sharks had amputation (12 individuals) and abrasion (7 individuals) scars. Scars occurred most often on the caudal fin and dorsal fin, five and four individuals respectively. This information is useful for understanding potential threats and designing better management programmes for R. typus conservation in TNTC. Abstrak Penelitian ini bertujuan untuk menganalisis panjang total dan kondisi luka hiu paus (Rhincodon typus) di Taman Nasional Teluk Cendrawasih (TNTC), Papua-Indonesia. Identifikasi foto digunakan untuk menentukan identitas individu hiu paus berdasarkan pola bintik di balik celah insang terakhir masing-masing individu. Identifikasi juga menggunakan foto berdasarkan luka hiu paus. Panjang tubuh total hiu paus diperkirakan berdasarkan panjang seorang perenang snorkel (diasumsikan 1,6 m) yang berenang bersama hiu paus. Kami mengidentifikasi 21 individu hiu paus, 14 individu diantaranya adalah hiu paus baru, sedangkan tujuh individu lainnya merupakan hiu paus yang pernah tercatat dalam database koleksi foto sebelumnya. Hiu paus berukuran panjang total 2 sampai 5 m (rata-rata 3,78 m, ± 0,86, N = 21). Berdasarkan ukurannya, semua individu hiu paus termasuk dalam kategori yuwana. Sebanyak 52% dari hiu paus yang diidentifikasi memiliki luka, 38% tidak memiliki luka dan 10% tidak teridentifikasi. Mayoritas hiu paus memiliki bekas luka potong (12 individu) dan luka lecet (tujuh individu). Lokasi luka paling sering terjadi pada sirip ekor dan sirip punggung, masing-masing lima dan empat individu. Informasi ini berguna untuk memahami potensi ancaman dan untuk merancang program pengelolaan yang lebih baik untuk konservasi R. typus di TNTC.
The growth pattern and condition factors of three spot gourami Trichopodus trichopterus (Pallas, 1770) from the Lempake Dam, East Kalimantan Jusmaldi Jusmaldi; Ardana Reswari Dianingrum; Nova Hariani
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.588

Abstract

The growth pattern and condition factors of three spots gourami Trichopodus trichopterus (Pallas, 1770) from Lempake Dam, East Kalimantan, are not yet informed. These studies aimed to investigate fishes' length and body weight, sex ratio, length-bodyweight relationships, growth patterns, and condition factors. The collection of fish sampling was carried out monthly from February to May 2020. A total of 912 individual samples of sepat rawa fish were caught by 15 fish traps using a purposive sampling method at three stations. This research showed that the total length of the fishes analyzed ranged from 31.68 to 103.53 mm, while body weight ranged from 1.12 to 7.22 g. The sex ratio in males and females was 1:1.19. The regression model of the length-body weight relationships calculated was W=3x10-5L2.861 for total samples, W=5x10-5L2.710 for males, and W=2x10-5L2.977 for females. The length-body weight was obtained strong relationships in all samples and sexes, with the regression coefficient (r) ranging from 0.965 to 0.977. An isometric growth pattern and the growth coefficient “b”=2.977 was observed in females, while a negative allometric growth pattern in males and both sexes, with the growth coefficient “b”= 2.710 and “b”=2.861. The values of relative condition factor (Kn) observed for females were ranged from 1.472 to 1.555 and for males ranged from 1.024 to 1.082. The growth pattern and relative condition factor of three spot gourami in the Lempake Dam were affected by the number of fishes in gonad mature condition and body shape. Abstrak Pola pertumbuhan dan faktor kondisi ikan sepat rawa Trichopodus trichopterus (Pallas, 1770) dari Bendungan Lempake, Kalimantan Timur belum pernah diinformasikan. Penelitian ini bertujuan untuk menganalisis panjang dan bobot tubuh ikan, nisbah kelamin, hubungan panjang-bobot tubuh, pola pertumbuhan dan faktor kondisi. Sampel ikan sepat rawa dikoleksi setiap bulannya dimulai dari bulan Februari hingga Mei 2020. Total 912 individu sampel ikan sepat rawa ditangkap dengan 15 perangkap ikan menggunakan metode purposive sampling pada tiga stasiun. Hasil dari penelitian ini menunjukkan panjang total ikan yang dianalisis berkisar antara 31,68-103,53 mm dan bobot tubuh berkisar antara 1,12-17,22 g. Nisbah kelamin jantan dan betina adalah 1:1,19. Model regresi hubungan panjang-bobot tubuh yang dihitung adalah W=3x10-5L2,861 untuk keseluruhan sampel, W=5x10-5L2,710 untuk jantan dan W=2x10-5L2,977 untuk betina. Hubungan panjang-bobot tubuh didapatkan sangat kuat pada keseluruhan sampel ikan dan jenis kelamin, dengan nilai regresi (r) berkisar dari 0,965-0,977. Pola pertumbuhan isometrik dengan koefisien pertumbuhan “b”=2,977 diamati pada betina, sedangkan pola pertumbuhan allometrik negatif pada jantan dan gabungan kedua jenis kelamin, dengan koefisien pertumbuhan “b”= 2,710 dan“b”=2,861. Nilai faktor kondisi relatif (Kn) yang diamati pada betina berkisar antara 1,472-1,555 dan jantan berkisar antara 1,024-1,082. Pola pertumbuhan dan faktor kondisi relatif ikan sepat rawa dari perairan Bendungan Lempake dipengaruhi oleh jumlah ikan kondisi matang gonad dan bentuk tubuh.
Optimization of reproduction of ricefish endemic to Southeast Sulawesi Oryzias woworae Parenti & Hadiaty, 2010 through different sex ratios in spawning Mohamad Ayip Firmansyah; Mustahal Mustahal; Mas Bayu Syamsunarno; Muh Herjayanto
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.589

Abstract

Oryzias woworae has a beautiful color and has been traded as ornamental fish. This species is an endemic ricefish from Muna Island, Southeast Sulawesi, and is threatened with endangered status. Information on the optimal spawning sex ratio in O. woworae is unknown. This study aimed was to examine the optimization of reproduction based on the sex ratio of male: female broodstock O. woworae involved in spawning. The sex ratio of male: female spawning broodstock used were 1:1, 1:2, 1:3, and 1:4. The male and female brooders used had a total length of 3,1 ± 0,5 cm and 2,5 ± 0,5 cm. After adaptation, the broodstock of O. woworae was put into aquariums according to the treatment, and each container contained three spawning substrates. The harvesting of eggs on the substrate is carried out two times a day. The results showed that spawning O. woworae with a ratio of 1♂: 4♀ produced the lowest number of eggs and was significantly different with ratios of 1♂: 1♀ and 1♂: 2♀ (P<0,05). The ratio of 1♂ : 3♀ gave the highest egg hatching of 55% but was not significantly different from other treatments (P>0,05). The difference in male and female ratios did not affect the survival rate of O. woworae larvae (P>0,05), with values from 91,9-100%. The highest larvae produced was found in the spawning ratio of 1♂ : 3♀ with 37 larvae but not significantly different from other treatments (P>0,05). The water quality values during the study were temperature 26,5-310C, pH 5,5-8,8, and dissolved oxygen 5,3-6,0 mg L-1. O. woworae broodstock spawning can be optimized with a male to female ratio of 1:3. Abstrak Oryzias woworae memiliki warna indah dan telah diperjualbelikan sebagai ikan hias. Spesies ini merupakan jenis ikan padi endemik dari Pulau Muna, Sulawesi Tenggara yang statusnya terancam punah. Informasi mengenai nisbah kelamin pemijahan optimal pada ikan O. woworae belum diketahui. Tujuan penelitian ini untuk mengkaji optimasi reproduksi berdasarkan nisbah kelamin induk jantan : betina O. woworae yang terlibat dalam pemijahan. Perlakuan nisbah kelamin pemijahan induk jantan ♂ : betina ♀ yang digunakan yaitu 1:1, 1:2, 1:3, dan 1:4. Induk jantan dan betina yang digunakan mempunyai panjang total yaitu 3,1 ± 0,5 cm dan 2,5 ± 0,5 cm. Setelah diadaptasikan, induk O. woworae dimasukkan ke dalam akuarium sesuai dengan perlakuan dan setiap wadahnya telah berisi tiga substrat pemijahan. Pemanenan telur pada substrat dilakukan setiap hari pada pagi dan sore hari. Hasil penelitian menunjukkan pemijahan ikan O. woworae dengan nisbah 1♂ : 4♀ menghasilkan jumlah telur yang terendah dan berbeda nyata dengan nisbah 1♂ : 1♀ dan 1♂ : 2♀ (P<0,05). Penetasan tertinggi terdapat pada nisbah 1♂ : 3♀ yaitu 55% namun tidak berbeda nyata dengan perlakuan lainnya (P>0,05). Perbedaan nisbah kelamin jantan dan betina tidak memengaruhi sintasan larva O. woworae (P>0,05), dengan nilai berkisar antara 91,9-100%. Jumlah larva dihasilkan tertinggi terdapat pada nisbah pemijahan 1♂ : 3♀ dengan 37 ekor larva namun tidak berbeda nyata dengan perlakuan lainnya (P>0,05). Nilai kualitas air selama penelitian yaitu suhu 26,5-310C, pH 5,5-8,8, dan oksigen terlarut 5,3-6,0 mg L-1. Pemijahan ikan O. woworae dapat dioptimalkan dengan perbandingan jantan dan betina sebesar 1:3.
Gonad development and blood plasma profile of female bada fish (Rasbora sp.) by giving a combination of the hormones estradiol and spirulina in the feed Ira Akhdiana; Muhammad Zairin Jr; Gadis Sri Haryani; Muhammad Agus Suprayudi
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.590

Abstract

This study aimed to evaluate the effect of the combination of estradiol-17β hormone and spirulina in feed on blood plasma biochemistry, histology, and gonad development of female bada fish (Rasbora argyrotaenia). The research method were an experimental study using a completely randomized design with four treatment combinations and four replications, namely without the addition of the estradiol-17β hormone and spirulina (P0), the addition of the estradiol-17β hormone at 7 g kg-1 feed (P1), the addition of spirulina at 30 g kg-1 feed (P2) and the addition of the estradiol-17β hormone at 7 g kg-1 feed and spirulina at 30 g kg-1 feed. Female bada fish (4.22±1.28 g) were kept in an aquarium measuring 100x50x50 cm3 with a density of seven individuals per aquarium. Fish were fed the treatment twice daily, with 3% of the biomass for six weeks. The test parameters were estradiol-17β hormone concentration, egg diameter, blood plasma glucose concentration, blood plasma total cholesterol concentration, and gonadal histology observations. The experimental results showed that the concentration of the estradiol-17β hormone in the body plasma of treatments P1 and P3 was statistically significantly different (P<0.05) compared to treatments P0 and P2. The combination of estradiol-17β hormone and spirulina added to the feed gave not significantly different results (P>0.05) on blood plasma biochemistry and egg diameter of bada fish broodstock. A combination of estradiol-17β hormone and spirulina hormones in the feed resulted in better P1 and P3 treatments with higher plasma concentrations of the estradiol-17β hormone. Observations of gonadal development from histology showed that the bada fish gonads belonged to the asynchronous type. Abstrak Penelitian ini bertujuan untuk mengevaluasi pengaruh pemberian kombinasi hormon estradiol-17β dan spirulina dalam pakan terhadap biokimia plasma darah, histologis dan perkembangan gonad ikan bada (Rasbora argyrotaenia) betina. Metode penelitian adalah penelitian eksperimental menggunakan rancangan acak lengkap dengan empat kombinasi perlakuan dan empat ulangan yaitu tanpa penambahan hormon estradiol-17β dan spirulina (P0), penambahan hormon estradiol-17β sebanyak 7 µg kg-1 pakan (P1), penambahan spirulina sebanyak 30 g kg-1 pakan (P2) dan penambahan hormon estradiol-17β sebanyak 7 µg kg-1 pakan dan spirulina sebanyak 30 g kg-1 pakan. Ikan bada betina (4,22±1,28 g) dipelihara dalam akuarium berukuran 100x50x50 cm3 dengan kepadatan tujuh ekor per akuarium. Ikan diberi pakan perlakuan dua kali sehari, sebanyak 3% dari biomassa selama enam minggu. Parameter pengujian yaitu konsentrasi hormon estradiol-17β, diameter telur, konsentrasi glukosa plasma darah, konsentrasi kolesterol total plasma darah dan pengamatan histologis gonad. Hasil percobaan terlihat konsentrasi hormon estradiol-17β dalam plasma tubuh perlakuan P1 dan P3 secara statistik berbeda nyata (P<0,05) dibandingkan dengan perlakuan P0 dan P2. Pemberian kombinasi hormon estradiol-17β dan spirulina yang ditambahkan pada pakan memberikan hasil yang tidak berbeda nyata (P>0,05) terhadap biokimia plasma darah dan diameter telur ikan bada. Penambahan kombinasi hormon estradiol-17β dan spirulina dalam pakan menghasilkan perlakuan P1 dan P3 lebih baik dengan nilai konsentrasi hormon estradiol-17β pada plasma tubuh lebih tinggi. Pengamatan perkembangan gonad dari histologis menunjukkan bahwa gonad ikan bada termasuk tipe yang asynchronous.
Effect of fermented rice bran flour in artificial feed on survival rate and feed conversion ratio of tilapia, Oreochromis niloticus (Linnaeus, 1758) Surianti Surianti; Hasrianti Hasrianti; Wahyudi Wahyudi; Muh Irwan
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.591

Abstract

Tilapia cultivation has the potential to be developed in Indonesia, especially in South Sulawesi. However, the obstacle faced in tilapia cultivation is feed; the price is relatively high because the raw materials are still imported. One of the efforts to overcome dependence on imported feed raw materials is using local raw materials, namely rice bran. This study aims to determine the best type of probiotic in hydrolyzing rice bran flour into artificial feed on survival and conversion ratio of tilapia fish feed. This research was conducted in Sidenreng Rappang Regency. The test animals used were tilapia larvae with an average size of 1.03 g. The maintenance container is a tarpaulin pond with a size of 1 m x 1 m x 1 m filled with 85 L of freshwater. The study was designed using a completely randomized design consisting of four treatments and three replications. The fermenting materials used as treatment were Bacillus sp., Lactobacillus sp., Aspergillus nigers, Yeast (Acetobacter). The test feed was given to 20 tilapia larvae stocked in each container for 60 days of rearing. The survival data and feed conversion ratio for tilapia were analyzed using analysis of variance (ANOVA). The results showed that tilapia fed fermented rice bran feed using the fermenter Lactobacillus sp. had a significant effect on survival (SR) with a value of 85% and the feed conversion ratio (FCR) of tilapia with a value of 2.23. Abstrak Usaha budidaya ikan nila sangat berpotensi untuk dikembangkan di Indonesia khususnya di Sulawesi Selatan. Akan tetapi kendala yang dihadapi dalam budidaya ikan nila yaitu pakan, harganya cukup mahal karena bahan baku masih diimpor. Salah satu upaya mengatasi ketergantungan bahan baku pakan impor adalah pemanfaatan bahan baku lokal yaitu dedak padi. Penelitian ini bertujuan menentukan jenis probiotik yang terbaik dalam menghidrolisis tepung dedak padi ke dalam pakan buatan terhadap sintasan dan nisbah konversi pakan ikan nila. Penelitian ini dilaksanakan di Kabupaten Sidenreng Rappang. Hewan uji yang digunakan adalah larva ikan nila berukuran rata-rata 1,03 ±0,02 g. Wadah pemeliharaan adalah kolam terpal dengan ukuran 1 m x 1 m x 1 m3 yang diisi air tawar sebanyak 85 L. Penelitian didesain dengan menggunakan Rancangan Acak Lengkap yang terdiri atas empat perlakuan dan tiga ulangan. Bahan pemfermentasi yang digunakan sebagai perlakuan yaitu Bacillus sp., Lactobacillus sp., Aspergillus nigers, Ragi (Acetobacter). Pakan uji diberikan pada larva ikan nila yang ditebar sebanyak 20 ekor setiap wadah selama 60 hari pemeliharaan. Data sintasan dan nisbah konversi pakan ikan nila yang diperoleh dianalisis dengan menggunakan analisis ragam (ANOVA). Hasil penelitian menunjukkan bahwa ikan nila yang diberi pakan dengan kandungan dedak padi terfermentasi menggunakan fermentor Lactobacillus sp. memberikan pengaruh yang nyata terhadap sintasan (SR) dengan nilai 85% dan nisbah konversi pakan (NKP) ikan nila dengan nilai 2,23.
The affection of fine bubbles (FBs) aplication on growth, feed efficiency of striped catfish, Pangasianodon hypophthalmus (Sauvage, 1878) and water quality in aquaponic system Yuli Andriani; Zahidah Zahidah; Rosidah Rosidah; Iskandar Iskandar
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.592

Abstract

This research aims to determine the effect of fine bubble technology with different pressures on Siamese catfish seed's growth and feed efficiency in an aquaponic system. This research used a completely randomized design with four treatments and three replications. Treatment A (Control), Treatment B (FBs with a pressure of 4.5 atm), Treatment C (FBs with a pressure of 5 atm and treatment D (FBs with a pressure of 5.5 atm). The parameters observed were Specific Growth Rate, Feed Conversion Ratio, water quality (temperature, pH, DO, and ammonia), and plant productivity. The seeds used were catfish seeds aged 16-36 days, 1-2 inches long, and weighed 0.26-0.29 grams. The container used is a fiber tub of 16 units with a size of 70 cm x 70cm x 70 cm. The feed used is commercial feed PF 1000 content crude protein 35%. The data were analyzed using variance with the F test at the 95% confidence level. The best treatment for catfish growth was treatment D (pressure 5.5 atm), which gave the highest SGR value of 7.24 ± 0.5 and FCR value of 1.19 ± 0.09. The value of water quality parameters is in suitable condition for the growth of catfish seed. The best plant productivity was found in treatment D with an average weight of 60.75 g. Abstrak Penelitian ini bertujuan untuk menentukan pengaruh teknologi fine bubble dengan tekanan yang berbeda terhadap pertumbuhan dan efisiensi pakan benih ikan patin siam dalam sistem akuaponik. Penelitian ini menggunakan Rancangan Acak Lengkap dengan empat perlakuan dan tiga ulangan. Perlakuan A (Kontrol), Perlakuan B (FBs dengan tekanan 4,5 atm), Perlakuan C (FBs dengan tekanan 5 atm) dan perlakuan D (FBs dengan tekanan 5,5 atm). Parameter yang diamati berupa laju pertumbuhan spesifik (LPS), nisbah konversi pakan (NKP), kualitas air (suhu, pH, oksigen terlarut, dan ammonia) dan bobot rata-rata tanaman. Benih yang digunakan adalah benih ikan patin dengan umur 16-36 hari, panjang 1-2 inci dan bobot 0,26-0,29 gram. Wadah yang digunakan adalah bak fiber sebanyak 16 buah unit dengan ukuran 70 cm x 70cm x 70 cm. Pakan yang digunakan adalah pakan komersial PF 1000 dengan kandungan protein kasar 35%. Data dianalisis menggunakan sidik ragam dengan uji F pada taraf kepercayaan 95%. Perlakuan terbaik terhadap pertumbuhan ikan patin adalah perlakuan D (tekanan 5,5 atm), yang memberikan nilai LPS tertinggi sebesar 7,24 ± 0,5% dan NKP sebesar 1,19 ±0,09. Nilai parameter kualitas air berada dalam kisaran yang layak untuk mendukung pertumbuhan benih ikan patin. Produktivitas tanaman terbaik terdapat pada perlakuan D dengan bobot rata-rata tanaman kangkung sebesar 60,75 gram.
Effectiveness of lactic acid bacteria to increase the body resistance of common carp, Cyprinus carpio Linnaeus, 1758 against Aeromonas hydrophila Rosidah Rosidah; Yuniar Mulyani; Fittrie Mellianawaty Pratiwy; Afifah Shabirah; Juli A Sinaga
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.593

Abstract

This study aims to find out the right lactic acid bacteria (LAB) isolates to improve the common carp body's immune system against the attack of the Aeromonas hydrophila bacterium. Lactic Acid Bacteria (LAB) isolates were obtained from the organs of the common carp intestine. The study used a Completely Randomized Design consisting of four treatments and three replications. The treatment used was immersion of test fish for 24 hours in several isolates of LAB with a density of 108 cfu ml-1, namely A: without LAB isolate (control), B: isolate CcB7, C: isolate CcB8, D: isolate CcB15. Immersion is done three times with a frequency of seven days. Parameters observed included clinical symptoms, survival rate, red and white blood cell counts. The results showed the immersion of LAB isolate CcB15, namely Lactobacillus gasseri was most effective for increasing the body's resistance to Common Carp, which was demonstrated by mild clinical symptoms and faster recovery, high fish survival rate (83.33%), and number of cells the highest white blood count of 147,47x103 cell mm-3 (an increase in white blood cells by 38%). Abstrak Penelitian ini bertujuan untuk menentukan isolat bakteri asam laktat (BAL) yang tepat untuk meningkatkan daya tahan tubuh ikan mas terhadap serangan bakteri Aeromonas hydrophila. Isolat Bakteri Asam Laktat (BAL) diperoleh dari organ usus ikan mas. Penelitian menggunakan Rancangan Acak Lengkap yang terdiri atas empat perlakuan dan tiga ulangan. Perlakuan yang digunakan adalah perendaman ikan uji selama 24 jam pada beberapa isolat BAL dengan kerapatan 108 cfu ml-1 yaitu A: isolat tanpa BAL (kontrol), B: isolat CcB7, C: isolat CcB8, D: isolat CcB15. Perendaman dilakukan tiga kali dengan frekuensi tujuh hari. Parameter yang diamati meliputi gejala klinis, tingkat sintasan, jumlah sel darah merah dan putih,. Hasil penelitian menunjukkan bahwa perendaman isolat BAL CcB15 yaitu Lactobacillus gasseri paling efektif untuk meningkatkan daya tahan tubuh terhadap ikan mas, yang ditunjukkan dengan gejala klinis ringan dan pemulihan lebih cepat, tingkat sintasan ikan tinggi (83,33%) dan jumlah sel tertinggi. jumlah darah putih 147,47x103 sel mm-3 (peningkatan sel darah putih sebesar 38%).
Population structure three species of Family Syngnathidae in Merowi River, Kecamatan Kembayan, Kabupaten Sanggau Kalimantan Barat Kasianus Krisye Firstantha; Tri Rima Setyawati; Riyandi Riyandi; Gema Wahyudewantoro
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.594

Abstract

Pipe fish is a type of freshwater fish that has potential as ornamental fish. The research objective was to determine the status and habitat conditions of the Merowi River pipe fish as a member of Syngnathidae. The research was conducted from July to December 2019. The research stations were determined based on differences in existing environmental bases. Sampling had done randomly by using scoop net and umbrella fish trap. The data used include population density, age group,test Chi-Square and Principal Component Analysis (PCA). The results showed that 2 genera consisted of 3 species of pipe fish, as much 248 individu. Doryichthys deokhatoides 26 individu (0.042 Catch/Unit Efort); D. martensii 209 individu (0.34 Catch/Unit Efort); Microphis retzii 13 individu (0.02 Catch/Unit Efort). The length of the pipe fish ranged from 48.1 mm to 87.4 mm, and the ratio of male to female is 1: 1 (balanced). The presence of members of Syngnathidae in the Merowi River was effect by temperature and current velocity. Abstrak Ikan pipa adalah salah satu jenis ikan air tawar yang potensial sebagai ikan hias. Penelitian ini bertujuan untuk menganalisis struktur populasi dan kondisi habitat ikan pipa dari famili Syngnathidae di Sungai Merowi. Penelitian dilaksanakan Bulan Juli hingga Desember 2019 pada 10 stasiun pengamatan yang ditentukan berdasarkan tutupan vegetasi dan arus sungai. Pengambilan sampel ikan pipa dilakukan secaracak dengan menggunakan serokan dan perangkap bubu payung. Data yang diperoleh dianalisis kepadatan populasi, kelompok umur, uji Chi-Square dan Analisis Komponen Utama. Hasil identifikasi diperoleh 2 marga dan 3 spesies ikan pipa sebanyak 248 individu yaitu Doryichthys deokhatoides 26 individu (0,042 individu/usaha); D. martensii 209 individu (0,34 individu/usaha); dan Microphis retzii 13 individu (0,02 individu/usaha). Ukuran panjang ikan pipa yang ditemukan berkisar 48,1 mm hingga 87,4 mm. Dari analisis Chi-Square diketahui ikan pipa yang ditemukan memiliki nisbah jantan dan betina 1:1 (seimbang). Kehadiran anggota famili Syngnathidae di Sungai Merowi dipengaruhi oleh faktor suhu dan kecepatan arus.
Recruitment patterns of freshwater amphidromous fishes (Pisces: Gobiidae, Eleotridae) to the Cimaja estuary, Palabuhanratu Bay Charles P.H Simanjuntak; Faqih Baihaqi; Tri Prabowo; Shafira Bilqis A; Sulistiono Sulistiono; Ayu Ervinia
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.595

Abstract

The sustainability of amphidromous fishes is determined by the success of the larval recruitment process from marine to freshwaters habitats. This study aimed to determine the recruitment pattern of freshwater amphidromous fish to the Cimaja River estuary, Palabuhanratu Bay in terms of season and daily. Amphidromous fish were caught monthly on the 25th of Hijri or waning crescent from December 2020 to August 2021. Sampling in one whole day with observation intervals every 4 hours was carried out in June 2021 to reveal the time of larvae and juveniles of the amphidromous fish recruit to the Cimaja River estuary. A total of 13 species of amphidromous fishes representing five genera and two families was captured. The recruitment of amphidromous fishes into the Cimaja River occurs between the peak of the rainy season to dry season. Generally, amphidromous recruit into the estuary waters of the Cimaja River is at the juvenile stage (11.9-21.8 mm body length). However, the recruitment of some amphidromous fish species appears at the postflexion stage (6.9-11.9 mm BL). Based on diel observations, larvae and juveniles of amphidromous fish are generally preferred to recruit to the Cimaja River estuary in the early morning (03:00 am) and afternoon (03:00 pm). Recruitment of amphidromous fish larvae to the Cimaja River follows a semi-diurnal tidal cycle which is a tidal type in Palabuhanratu Bay. Amphidromous fishes use tidal flux to recruit and migrate upstream of the Cimaja River through estuaries. Abstrak Keberlanjutan sumber daya ikan amfidromus ditentukan oleh keberhasilan proses rekrutmen larva dari habitat laut menuju perairan tawar. Penelitian ini bertujuan untuk mengetahui pola rekrutmen ikan amfidromus air tawar menuju perairan estuari Sungai Cimaja, Teluk Palabuhanratu ditinjau dari musim dan harian. Ikan amfidromus ditangkap setiap bulan pada tanggal 25 Hijriah atau awal bulan baru dari Desember 2020 sampai Agustus 2021. Sampling dalam satu hari penuh dengan interval pengamatan setiap 4 jam dilakukan pada Juni 2021 untuk menentukan waktu larva dan yuwana ikan amfidromus rekrut ke estuari Sungai Cimaja. Sebanyak 13 spesies anak ikan amfidromus mewakili lima genera dan dua famili ditemukan. Puncak rekrutmen anak ikan amfidromus di Sungai Cimaja terjadi antara pertengahan musim penghujan sampai musim kemarau. Anak ikan amfidromus yang melakukan rekrutmen ke perairan estuari Sungai Cimaja umumnya berada pada stadia yuwana (panjang tubuh 11.9-21.8 mm). Namun proses rekrutmen ke wilayah estuari Cimaja pada beberapa spesies ikan amfidromus lainnya terjadi pada stadia postflexion (6,9-11,9 mm). Berdasarkan pengamatan harian ditemukan bahwa larva dan yuwana ikan amfidromus umumnya memilih rekrut ke estuari Sungai Cimaja pada dini hari (pukul 03:00) dan sore hari (15:00). Puncak rekrutmen larva ikan amphiromus menuju Sungai Cimaja mengikuti siklus pasang semi-diurnal yang merupakan tipe pasang di Teluk Palabuhanratu. Ikan amphidromous memanfaatkan gelombang pasang untuk rekrut dan beruaya ke arah hulu Sungai Cimaja melewati daerah estuari.
Reproductive biology climbing perch Anabas testudineus (Bloch 1792) at Danau Tempe Kabupaten Wajo South Sulawesi Hasnidar Hasnidar; Andi Tamsil; Hasrun Hasrun; Andi Muhammad Akram
Jurnal Iktiologi Indonesia Vol 22 No 1 (2022): February 2022
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v22i1.567

Abstract

The high exploitation pressure and decreasing environmental conditions of Lake Tempe due to pollution, sedimentation, growth of aquatic weeds, and the presence of invasive alien fish, namely suckermouth catfish, are thought to have harmed one of the native fish, namely climbing perch (Anabas testudineus). The research aims to analyze the reproductive biology of climbing perch. Fish were caught using gill nets from January to April 2021. The total length of the fish was measured using a caliper (cm), and the weight (g) was measured using an analytical balance. Fish gonads were preserved in a 4% formalin solution. Fish fecundity was calculated based on the gravimetric method. The length distribution of male and female fish was 7.5 - 15.5 and 7.5 - 17.5 cm, respectively. The maximum climbing perch caught was 17.5 cm smaller than the maximum length ever caught, which was 35.0 cm, and the average size was 9.56 cm smaller than the average length of climbing perch, which was 12.5 cm. The ratio of male and female fish as a whole was 1.1: 0.9 or 53%: 47%, while the sex ratio of males and females in spawning was 38%: 62%. Climbing perch is polygamous, i.e., male fish have several partners in one spawning season. The spawning season lasted throughout the research period, with the spawning season's peak in February with a total spawner pattern. Fecundity ranged from 253-10,237 eggs with an average value of 2,571 eggs, and the relationship between length and weight with fecundity was very strong. The growth pattern of male and female fish was negative allometric. Abstrak Tekanan eksploitasi yang tinggi dan kondisi lingkungan Danau Tempe yang semakin menurun akibat pencemaran, sedimentasi, pertumbuhan gulma air, dan hadirnya ikan asing invasif, yaitu ikan sapu-sapu, diduga telah memberikan pengaruh buruk terhadap salah satu ikan asli yaitu ikan betok (Anabas testudineus). Penelitian bertujuan untuk menganalisis kondisi biologi reproduksi ikan betok. Ikan sampel ditangkap menggunakan jaring insang dari Januari-April 2021. Panjang total ikan diukur dengan jangka sorong (cm) dan bobot ditimbang (g) dengan timbangan analitik. Gonad ikan diawetkan dalam larutan formalin 4%. Fekunditas ikan dihitung berdasarkan metode gravimetrik. Sebaran ukuran panjang ikan jantan dan betina masing-masing 7,5 - 15,5 dan 7,5 - 17,5 cm. Panjang maksimum ikan betok yang tertangkap yaitu 17,5 cm lebih kecil dari panjang maksimum yang pernah tertangkap yaitu 35,0 cm, dan panjang rata-rata yaitu 9,56 cm lebih kecil dari panjang rata-rata ikan betok yaitu 12,5 cm. Nisbah ikan jantan dan betina secara keseluruhan sebesar 1,1 : 0,9 atau 53% : 47%; sedangkan nisbah kelamin jantan dan betina dalam pemijahan yaitu 38% : 62%. Ikan betok bersifat poligami yakni ikan jantan memiliki beberapa pasangan dalam satu musim pemijahan. Musim pemijahan berlangsung sepanjang bulan penelitian dengan puncak musim pemijahan pada Februari dengan pola pemijah serentak. Fekunditas berkisar antara 253- 10.237 telur dengan nilai rata-rata 2.571 telur. Hubungan panjang dan bobot dengan fekunditas sangat kuat.Pola pertumbuhan ikan jantan dan betina adalah allometrik negatif.

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