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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 8 Documents
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Search results for , issue "Vol 18 No 2 (2018): June 2018" : 8 Documents clear
Otolith shape indices of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758) from the Indian Ocean Arief Wujdi; Maya Agustina; Irwan Jatmiko
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.312

Abstract

Skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758) plays an important role in terms of the marine ecosystems as preyed-upon by shark, billfish, and larger tunas. In order to determine food chain system, there was a gap information as digested skipjack tuna difficult to be identified. This study aimed to determine shape indices to describe the otolith shape of skipjack. The morphometry data were collected from 253 pairs of skipjack tuna’s otolith during February, April, August, and September 2016 from four fishing ports namely Binuangeun, Sadeng, Prigi, and Labuhan Lombok. The data normality and homogenity also determined using Kolmogorov-Smirnov and Levene test respectively. In addition, right and left otolith morphometry were investigated using paired T-test. The shape indices were calculated using six descriptors including form factor (FF), roundness (RO), circularity or compactness (C), rectangularity (Rt), ellipticity (E), and aspect ratio (AR). Multivariate test using MANOVA and Tuckey test also implemented to investi-gate variation among locations. The results showed that the data were distributed normally and homogenly. There were also not significantly difference on otolith morphometry between left and right side (P>0,05). Shape indices also pro-vided in this paper. Skipjack tuna’s otolith has performed as non-rounded, closed to oval, elongated, and irregular surface. Abstrak Ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758) berperan penting dalam ekosistem perairan laut, yaitu mangsa bagi jenis hiu, kelompok billfish, dan tuna berukuran besar lainnya. Dalam hal mengungkap hubungan pemangsa dan mangsa dalam suatu rantai makanan, seringkali terjadi kekosongan informasi karena sulitnya mengidentifikasi ikan yang telah tercerna. Penelitian ini bertujuan untuk menentukan bentuk morfologi otolit ikan cakalang berdasarkan nilai indeks bentuk. Data morfometri dikumpulkan dari 253 pasang otolit ikan cakalang pada bulan Februari, April, Agustus, dan September tahun 2016 di empat tempat pendaratan ikan, yaitu: Binuangeun, Sadeng, Prigi, dan Labuhan Lombok. Data morfometri otolit diuji normalitas dan homogenitasnya masing-masing menggunakan uji Kolmogorof-Smirnov dan Levene. Uji T berpasangan juga diterapkan untuk memastikan signifikansi perbedaan antara morfometrik otolit kanan dan kiri. Penghitungan indeks bentuk menggunakan enam deksriptor, yang meliputi form factor (FF), roundness (RO), circularity atau compactness (C), rectangularity (Rt), ellipticity (E), dan aspect ratio (AR). Analisis multivariat menggu-nakan MANOVA dan uji Tuckey juga diterapkan untuk menentukan perbedaan morfometri otolit dari masing-masing lokasi. Hasil menunjukkan bahwa data tersebar normal dan homogen serta tidak terdapat perbedaan yang signi-fikan pada morfometri otolit kanan dan kiri (P>0,05). Penelitian ini juga menyajikan nilai indeks bentuk yang menjelas-kan bentuk morfologi otolit ikan cakalang, yaitu memiliki karakteristik cenderung oval, memanjang, dan memiliki per-mukaan yang tidak beraturan.
Composition and digestibility values of Indigofera zollingeriana leaf meal on hoven’s carp seed Leptobarbus hoevenii which fermented with sheep rumen liquor Dwinda Pangentasari; Mia Setiawati; Nur Bambang Priyo Utomo; Mas Tri Djoko Sunarno
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.314

Abstract

The aim of this study was to evaluate the nutritional content of fermented tarum leaf meal and its nutrient digestibility on hoven’s carp juvenile. This study consisted of two steps namely fermentation and determination of nutrient digesti-bility of tarum leaf meal. Sheep’s rumen fluids used as fermentator of tarum leaf, fermentation was performed for 24 hours with several levels at 0, 200, 400 and 600 mL kg-1, then dried and analyzed for proximate. Digestibility trial was carried out for fermented and non-fermented tarum leaf meal. Digestibility trial was conducted by adding Cr2O3 as the indicator and faecal collection through siphoning. Hoven’s carp (2,31± 0,02 g) were cultured for 30 days using 60 cm x 50 cm x 40 cm aquarium with a density of 25 fishes aquarium-1. Fish were fed three times daily ad satiation. Feces were collected one hour after feeding, dried and analyzed. Fermentation test showed that the nutrient content of fer-mented tarum leaf meal using 600 mL kg-1 dose was better and significantly than other doses in crude fiber and nitrogen free extract were 9,32±0,53and 49,23±1,11. The decrease of crude fiber were 36%. Digestibility test showed that the raw material digestibility, protein digestibility, fat digestibility and energy digestibility in use tarum meal was better and significantly different than non-fermented tarum leaf meal. The results showed that fermented tarum leaf meal at 600 mL kg-1 increase quality of nutrients and digestibility of hoven’s carp seed. Abstrak Penelitian ini bertujuan untuk mengevaluasi kandungan nutrisi dari fermentasi tepung daun tarum dan kecernaannya terhadap benih ikan jelawat. Penelitian terdiri atas dua tahap yaitu fermentasi dan uji kecernaan bahan dari tepung daun tarum. Fermentasi tepung daun tarum menggunakan cairan rumen domba sebagai fermentator. Fermentasi dilakukan selama 24 jam dengan dosis 0 (kontrol), 200, 400, dan 600 mL kg-1, kemudian dikeringkan dan dianalisis proksimat. Uji kecernaan menggunakan tepung daun tarum yang difermentasi dan tanpa fermentasi. Uji kecernaan bahan dilakukan dengan menambahkan Cr2O3 pada pakan sebagai indikator dengan metode penyifonan feses. Ikan jelawat (2,31± 0,02 g) dipelihara dalam wadah akuarium ukuran 60 cm x 50 cm x 40 cm dengan kepadatan 25 ekor akuarium-1 selama 30 hari. Ikan diberi pakan tiga kali sehari secara satiasi. Feses diambil satu jam setelah pemberian pakan, dikeringkan dan dianalisis kimia. Uji fermentasi menunjukkan bahwa kandungan nutrien tepung daun tarum yang difermentasi menggu-nakan dosis 600 mL kg-1 lebih baik dan berbeda nyata dibandingkan dosis lainnya pada kandungan serat kasar dan ba-han ekstrak tanpa nitrogen yaitu 9,32±0,53dan 49,23±1,11. Penurunan serat kasar terjadi sebanyak 36%. Uji kecernaan menunjukkan bahwa kecernaan bahan, kecernaan protein, kecernaan lemak, dan kecernaan energi pada penggunaan tepung daun tarum yang difermentasi lebih baik dan berbeda nyata dibandingkan dengan tepung daun tarum tanpa fer-mentasi. Hasil tersebut menunjukkan bahwa fermentasi tepung daun tarum dengan dosis 600 mL kg-1 meningkatkan kualitas nutrisi bahan dan kecernaan terhadap benih ikan jelawat.
The morphology of Thai mahseer’s Tor tambroides (Bleeker, 1854) axial skeleton (ossa vertebrae) Ilham Zulfahmi; Yusrizal Akmal; Agung Setia Batubara
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.329

Abstract

This study aims to describe the axial skeleton morphology (ossa vertebrae) of Thai mahseer’s,Tor tambroides (Bleeker 1854). A 5 kg of 65 cm fish sample were obtained from fish trader in the Tangse River area of Pidie district.. The axial skeleton preparations processed at the Laboratory of Mathematics and Natural Sciences, Al Muslim University, Bireuen district. The identification of terminology was done at Integrated Biology Laboratory, Biology Department, Faculty of Science and Technology, Ar-Raniry Islamic State University. The keureling’s axial skeleton processed by physically and chemically.. Axial skeleton was arranged into a single piece to analyze every part of it. Every part of axial skeleton documented by using Canon EOS 700D camera and processed by Adobe Photoshop CS3. The labeling of each part of the axial skeleton was done by comparing the similarity of the shape and location of each part of the fish axial skeleton that has been studied previously, either from the same family or from the different family.The results showed that Keureling had four axial vertebrae bones belonging to the weberian apparatus, 19 ossa abdominal vertebrae, 18 pairs ossa costales, 16 ossa caudal vertebrae and one os urostyles vertebrae. Abstrak Penelitian ini bertujuan untuk mendeskripsikan morfologi tulang belakang (ossa vertebrae) ikan keureling, Tor tam-broides (Bleeker, 1854). Contoh ikan diperoleh dari pedagang ikan di wilayah sungai Tangse Kabupaten Pidie dengan bobot 5 kg dan panjang 65 cm. Tahapan pembuatan preparat tulang belakang dilakukan di Laboratorium Matematika dan Ilmu Pengetahuan Alam, Universitas Al Muslim Kabupaten Bireuen. Identifikasi terminologi tulang belakang ikan dilakukan di Laboratorium Terpadu Biologi, Program studi Biologi, Fakultas Sains dan Teknologi, Universitas Islam Negeri Ar-Raniry. Pembuatan preparat tulang belakang dilakukan secara fisik dan kimiawi. Tulang belakang yang telah bersih dirangkai menjadi satu kesatuan untuk dianalisis setiap bagian-bagiannya. Pemotretan setiap bagian tulang bela-kang dilakukan dengan menggunakan kamera Canon EOS 700D dan diolah dengan menggunakan Adobe Photoshop CS3. Penamaan setiap bagian tulang belakang dilakukan dengan cara membandingkan kemiripan bentuk dan letak dari setiap bagian tulang belakang ikan yang telah diteliti sebelumnya, baik dari famili yang sama maupun dari famili yang berbeda. Hasil penelitian menunjukkan ikan keureling memiliki empat buah tulang axial vertebrae yang termasuk da-lam tulang Weber (Weberian apparatus), 19 ossa abdminal vertebrae, 18 pasang ossa costae, 16 ossa caudal vertebrae dan satu os urostyles vertebrae.
Length-weight relationship and condition factor of spotted barb Barbodes binotatus (Valenciennes, 1842) in Barambai River Samarinda East Kalimantan Jusmaldi Jusmaldi; Nova Hariani
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.426

Abstract

Biology of the spotted barb Barbodes binotatus (Valenciennes, 1842) in Barambai River, east Kalimantan is unknown. This study aimed to analyses sizes of fish, sex ratio, length-weight relationship and condition factor of the spotted barb. A total of 347 fish samples were collected by several gears in Barambai River from August to October 2017. The results of this research showed that the total length of the fish ranged from 45.67 to 146.01 mm and weight ranged from 1.27-43.34 g. The sex ratio of male and female were 1:1.12. The length-weight equations for males was W = 1x10-5 L3.063, W = 8x10-6L3.108 for females, and W = 9 x 10-6 L3.091 for both sexes. The condition factor (K) for the spotted barb was ranged between 0.826 – 2.214 with mean value of 1.163. Abstrak Biologi ikan wader bintik dua Barbodes binotatus (Valenciennes, 1842) di Sungai Barambai, Kalimantan Timur belum diketahui. Penelitian ini bertujuan menganalisis ukuran ikan, nisbah kelamin, hubungan panjang bobot, dan faktor kon-disi. Total 347 sampel ikan dikumpulkan dengan menggunakan berbagai alat tangkap di Sungai Barambai dari bulan Agustus sampai Oktober 2017. Hasil penelitian menunjukkan bahwa panjang total ikan berkisar dari 45,67 sampai 146,01 mm dan bobot tubuh berkisar 1,27- 43,34 gram. Nisbah kelamin jantan dan betina 1: 1,12. Model hubungan panjang bobot ikan jantan W = 1x10-5 L3,063, ikan betina W = 8x10-6L3,108,dan keseluruhan jenis ikan W = 9 x 10-6 L3,091. Faktor kondisi (K) ikanwader bintik dua berkisar antara 0,826 - 2,214 dan rata-rata 1,163.
Masculinization of guppy fish (Poecilia reticulata Peters, 1859) with extract of sea cucumber (Holothuria scabra) Anugerah Saputra; Astri Wulandari; . Ernawati; Muhammad Amri Yusuf; Irvan Eriswandy; Andi Aliah Hidayani
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.427

Abstract

Guppy fish Poecilia reticulata is one of the most popular freshwater ornamental fish species because it is easy to main-tain, and has beautiful variations of color, especially males. One method to produce male guppy is masculinization me-thod. This study aimed to determine the dose of hormone treatment from visceral organ of sea cucumber to the process masculinization of fish guppy. This study used a completely randomized design with the immersion treatment of parent guppy which has been bred into the extract solution of sea cucumber innards for 24 hours with different doses i.e. 0 mg L-1, 10 mg L-1, 20 mg L-1, 30 mg L-1 and 22 mg L-1 (metiltestosterone as positive control). The parameter measured was the percentage of male fish produced. The results showed that although the effect of the treatment was not significantly different, but it can be said to be significantly different to the treatment of 0 mg L-1 (control) to obtain the best result for masculinization of guppy at 30 mg L-1 immersion and the best survival rate on treatment of 0 mg L-1 (control). The re-sults of this study suggest that the masculinization technology on the parent stock can be done using extracts of sea cu-cumber innards which has been considered as waste. Abstrak Ikan gapi Poecilia reticulata merupakan salah satu jenis ikan hias air tawar yang banyak digemari karena mudah dipe-lihara, dan memiliki variasi wama yang indah, terutama jantannya. Salah satu metode untuk menghasilkan ikan gapi jantan adalah dengan metode pembalikan kelamin melalui produksi penjantanan ikan gapi. Penelitian ini bertujuan un-tuk menentukan dosis hormon perlakuan ekstrak jeroan teripang pasir terhadap proses penjantanan ikan gapi. Penelitian ini menggunakan rancangan acak lengkap dengan perlakuan perendaman induk ikan gapi yang telah dipijahkan ke dalam larutan ekstrak jeroan teripang pasir selama 24 jam dengan dosis berbeda, yaitu 0 mg L-1, 10 mg L-1, 20 mg L-1, 30 mg L-1 dan 22 mg L-1 (metiltestosteron sebagai kontrol positif). Parameter yang diukur adalah persentase ikan jantan yang dihasilkan. Hasil penelitian menunjukkan bahwa walaupun pengaruh antarperlakuan yang diberikan tidak berbeda nyata, tetapi dapat dikatakan berbeda nyata terhadap perlakuan 0 mg L-1 (kontrol) sehingga diperoleh hasil terbaik untuk penjantanan ikan gapi pada dosis perendaman 30 mg L-1 dan sintasan terbaik pada perlakuan 0 mg L-1 (kontrol). Hasil penelitian ini memberikan informasi bahwa teknologi penjantanan pada induk ikan gapi dapat dilakukan dengan me-manfaatkan ekstrak jeroan teripang pasir yang selama ini dianggap sebagai limbah.
Taxonomical status of endemic freshwater ichthyofauna of Sulawesi Renny Kurnia Hadiaty
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.428

Abstract

The freshwaters of Sulawesi are the habitat of numerous endemic Indonesian ichthyofauna that are not found anywhere else in the world. About 68 endemic fish species described from the Sulawesi’s freshwaters, it consisted of seven fami-lia of four order. The seven familia are Adrianichthyiidae (19 spesies, two genera), Telmatherinidae (16 spesies four gen), Zenarchopteridae (15 spesies, three gen), Gobiidae (14 spesies., empat gen), Anguillidae (one spesies, one gen), Eleotridae (two spesies, two gen), Terapontidae (one spesies, one gen). Most of the Sulawesi’s endemic ichthyofauna inhabit in lakes (45 spp., about 66.2%), 23 spp. lives in the rivers. The Sulawesi’s first species was Glossogobius cele-bius described by Valenciennes in 1837, the type spesimen deposited in Paris Museum. Eight species described in 19 century, up to the year of Indonesian independence 29 spesies described, after that 39 spesies of endemic ichthyofauna described from Sulawesi’ freshwater. The earlier description the type specimen deposited in the foreign museums, but in 1990 Dr. Maurice Kottelat pioneered to deposited the type specimen in Museum Zoologicum Bogoriense (MZB), Zoologi Division of Research Center for Biology. So far, the type specimens of Sulawesi freshwater ichthyofauna deposited in 27 museums of 11 countries in the world, the most museums were in United Stated of America (8 mu-seums), Germany (6 museums), Schwitzerland (3 museums), Australia and Netherlands (2 museums), while the others (Austria, Japan, Singapore, United Kingdom and Indonesia) each country with one museums respectively. Abstrak Perairan tawar Pulau Sulawesi merupakan habitat beragam iktiofauna endemik Indonesia yang tidak dijumpai di bagian manapun di dunia ini. Dari perairan tawar pulau ini telah dideskripsi 68 spesies ikan endemik dari tujuh familia, tergo-long dalam empat ordo. Ke tujuh familia tersebut adalah Adrianichthyiidae (19 spesies, dua genera), Telmatherinidae (16 spesies, empat genera), Zenarchopteridae (15 spesies, tiga genera), Gobiidae (14 spesies, empat genera), Anguilli-dae (satu spesies, satu genus), Eleotridae dua spesies, dua genera), dan Terapontidae (satu spesies, satu genus). Seba-gian besar spesies endemik di P. Sulawesi hidup di perairan danau (45 spesies atau 66,2%), 23 spesies hidup di perairan sungai. Spesies pertama yang dideskripsi dari P. Sulawesi adalah Glossogobius celebius oleh Valenciennes tahun 1837, spesimen tipenya disimpan di Museum Paris. Delapan spesies ditemukan pada abad 19, sampai sebelum kemerdekaan Indonesia telah ditemukan 29 spesies, setelah merdeka ditemukan 39 spesies di P. Sulawesi. Di awal penemuan spesies baru, spesimen tipe disimpan di museum luar negeri, namun sejak tahun 1990 dipelopori oleh Dr. Maurice Kottelat spesimen tipe disimpan di Museum Zoologicum Bogoriense (MZB), Bidang Zoologi, Pusat Penelitian Biologi. Sampai saat ini spesimen tipe iktiofauna dari P. Sulawesi disimpan di 27 museum dari 11 negara di dunia, terbanyak di Ame-rika (8), Jerman (6), Swiss (3), Australia, dan Belanda (2), sedangkan di Austria, Jepang, Perancis, Singapura, Inggris, dan Indonesia masing-masing satu museum.
Fish species of fishermens’ catches in Kuala Tungkal - Tungkal Ilir Sub-District, Tanjung Jabung Barat Regency, Jambi Province Khaerudin Khaerudin; Afreni Hamidah; Winda Dwi Kartika
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.429

Abstract

The aim of this study was identify fish species caught by fishermen in the fish auction site (FAS) and compare with fish species in the fish market of Kuala Tungkal, Tanjung Jabung Barat Regency, Jambi. Fish samples were collected from FAS and fish market of Kuala Tungkal from July to August 2014. Fish identification was done according to morphome-tric characteristics of fish speciemens using fish identification books. A total of 49 fish species belonging to 32 families and 11 orders were identified along the study period. The number of fish species found in TPI and fish markets was dif-ferent. Thirty-two fish species were recognized in FSA and 13 species of which were not found in the fish market. Of the 36 fish species found in the fish market, 17 fish were not collected in the FSA. A total of 19 fish species fish were found in both locations. It is necessary to conduct a similar research in different seasons to obtain a comprehensive in-formation about fish species caught in the waters around Tanjung Jabung Barat, Jambi.uct research in a longer period of time. Thus it is hoped that more fish species may be found only in certainseasons. Abstrak Penelitian ini bertujuan untuk mengidentifikasi jenis-jenis ikan yang tertangkap oleh nelayan dan dilelang di Tempat Pelelangan Ikan (TPI) serta membandingkannya dengan hasil tangkapan nelayan yang ada di pasar ikan Kuala Tungkal. Sampel ikan diambil dari hasil tangkapan nelayan yang akan dilelang di TPI dan pasar ikan Kuala Tungka dari Juli sampai Agustus 2014. Proses identifikasi dilakukan dengan membandingkan karakteristik morfologi spesimen dengan menggunakan buku identifikasi ikan. Teridentifikasi sebanyak 49 jenis ikan dari 32 famili dan 12 ordo selama peneli-tian. Ada perbedaan jumlah jenis ikan yang dikoleksi antara TPI dengan pasar ikan. Sebanyak 32 spesies ikan teriden-tifikasi di TPI dan 13 spesies diantaranya tidak ditemukan di pasar ikan. Dari 36 spesies ikan yang ditemukan di pasar ikan, 17 ikan tidak ditemukan di TPI. Sebanyak 19 jenis ikan ditemukan di kedua lokasi. Perlu dilakukan penelitian serupa pada musim yang berbeda untuk mendapatkan informasi yang utuh mengenai jenis-jenis ikan yang tertangkap di perairan sekitar Tanjung Jabung Barat, Jambi.
Comparison of lethal concentrations (LC50 – 96 H) toward common carp, Cyprinus carpio Linnaeus 1758 mortality in leather industry liquid waste and piretroid insecticide D Arfiati; U Zakiyah; I. S Nabilah; N Khoiriyah; A. S. Jayanti; H. F Kharismayanti
Jurnal Iktiologi Indonesia Vol 18 No 2 (2018): June 2018
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v18i2.430

Abstract

The common carp (Cyprinus carpio) with sizes of 3 - 5 cm are usually culture in the paddy fields when the plants still need water for its growth. However, the water which is used to irrigate the paddy fields often contains pollutants, comes from polluted rivers. This study aimed to determine the value of lethal concentrations (Lc60–96 H) in the waste water of leather industry and pyrethroid insecticide with Deltametrin active compound toward mortality of common carp seeds. The research was conducted in two different stages and performed in an experimental method with completely ran-domized design. The experiments for liquid waste of leather industry used seven experiments, while for insecticides with eight experiments. The result of probit analysis for waste of leather industry indicated that LC50 – 96 H was 0,056 ml L-1, while for pyretroid insecticide was 0.0042 mg L-1. It could be said that insecticide had stronger effect on fish seeds mortality because only small amount of concentration could kill fish seeds. The results of this study shown that insecticides was ± 70 thousand times easier to kill fish seeds compared with leather industry waste. Therefore, people should be careful when disposing waste into the water because it will disrupt the life of aquatic organism. Abstrak Benih ikan mas (Cyprinus carpio) ukuran 3 - 5 cm seringkali dipelihara di sawah yaitu pada saat padi masih membu-tuhkan air untuk pertumbuhannya. Namun air yang digunakan untuk mengairi sawah seringkali mengandung bahan pencemar karena berasal dari sungai yang menerima limbah. Penelitian ini bertujuan untuk mendapatkan nilai LC50 – 96 jam limbah penyamakan kulit dan insektisida piretroid berbahan aktif deltametrin terhadap mortalitas benih ikan mas. Penelitian ini dilaksanakan dalam dua tahap yang berbeda dan dilakukan dalam metode eksperimen rancangan acak lengkap. Eksperimen untuk limbah cair penyamakan kulit digunakan tujuh perlakuan dan insektisida digunakan delapan perlakuan. Hasil analisis probit untuk limbah penyamakan kulit diperoleh nilai LC50 – 96 jam sebesar 277,73 ml L-1 sedangkan nilai LC50 - 96 jam untuk insektisida piretroid yakni 0,0042 mg L-1. Hal ini menunjukkan bahwa insektisida lebih kuat pengaruhnya terhadap kematian benih ikan, karena dengan konsentrasi yang sedikit saja sudah dapat mema-tikan benih ikan. Hasil penelitian menunjukkan bahwa insektisida ±70.000 kali lebih mudah mematikan benih ikan dibandingkan dengan limbah penyamakan kulit. Sebab itu, perlu kewaspadaan dalam membuang limbah ke perairan umum karena akan mengganggu kehidupan organisme penghuninya

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