SWL-Fisheries and Marine

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Browsing SWL-Fisheries and Marine by Author "Alawi, Hamdan"

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    Kajian Kelestarian Ikan Baung (Mystus nemurus) Di Perairan Umum Kabupaten Kuantan Singingi, Riau, Indonesia
    (2015-03-05) Rengi, Pareng; Alawi, Hamdan; sumarto
    Produksitas untuk jenis ikan baung di wilayah Kabupaten Kuantan Singingi mengalami penurunan setiap kali melakukan penangkapan ikan. Hal ini menunjukkan bahwa jenis ikan baung dalam kondisi terancah punah dan perlu mendapat prioritas untuk dilakukan pengembangan dan restocking ke perairan umum. Jenis ikan yang termasuk kondisi terancam punah selain jenis ikan baung di wilayah perairan umum Kabupaten Kuantan Singingi yaitu: ikan kapiek, selais, segitiga, paweh, barau, luang, kelabau, subhan, tapah. Jenis ikan yang termasuk kepada punah adalah jenis ikan belida dan klosso. Untuk pengembangan budi daya perikanan dalam rangka stok ikan dapat dilakukan dengan metode budi daya keramba dan penebaran benih ikan ke perairan umum dengan mempertimbangkan jenis dan kondisi ling kung an pada masing-masing jenis perairan umum Kuantan Singingi. Strategi kebijakan dalam manajemen kelestarian stok ikan adalah dengan mengatur wilayah penangkapan ikan, manajemen wilayah konservasi bagi wilayah waduk Teso Desa Marsawa Kecamatan Benai, Waduk Batang Pangean, dan Sungai Larangan Desa Pangkalan lndarung Kecamatan Singingi serta Danau Soreak Basrah Kecamatan Kuantan Hilir dan program pengembangan budi daya keramba di perairan umum.
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    Pemeliharaan Larva Ikan Katung (Pristolepis Grooti Bleeker) Dengan Pemberian Pakan Awal Berbeda
    (2018-02-13) Alawi, Hamdan; Ariyani, Netti; Asiah, Nur
    The Indonesian Leaffish, Pristolepis grooti is one of endangered species found in some river system in Indonesia. The demanded and good culture candidate species for which the development of larval raring techniques are needed for large scale. A study was conducted to assess the effects of different type of feeds on growth and survival rate of the larva for 35 days rearing period. The experiment was designed on completely randomized design (CRD) with 4 treatments, each with 3 replications. Four different feeds were tested, viz. AR (Artemia nauplii), TB (tubificid worms), WF (Water Flea, Daphnia and Moina) and BE (Boiled chicken egg yolk). Induced bred larvae (10-day old) were reared in 20 liters glass aquarium with a recirculation water system During the experimental period the larvae were fed to satiation three times a day. The water quality variables such as temperature, dissolved oxygen (DO), pH, free ammonia, were found within acceptable limit of larval rearing. The larvae fed tubificid worms had significantly highest (P<0.05) growth (percent length gain (423.3±37.3), percent weight gain (13905.5±567.6), specific growth rate (14.1±0.1) and survival (63.3±16.1) followed by Artemia nauplii and water Flea and boiled chickedn egg yolk. Therefore, tubificid worms may be suggested for feeding Indonesian leaffish larvae up to stockable size.
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    Pengaruh Kadar Protein Pakan Terhadap Penampilan Pertumbuhan, Kematangan Gonad Dan Fekunditas Ikan Katung (Pristolepis Grooti Bleeker) Matang Gonad Pertama
    (2018-02-13) Alawi, Hamdan; Aryani, Netti; Asiah, Nur
    The effect of three protein levels of commercial diet on the growth performance, gonad maturation and fecundity of first maturity of Indonesian leaffish (Pritolepis grooti) was conducted in 54 liters recirculation aquaria system for 10 months rearing period. Eight-week-old artificial spawned Indonesian leaffish katung (Pristolepis grooti Bleeker)) fry with an average weight (SD) of 0.560(0.116) g were fed 5% BW three times a day with commercial diets 18, 28 and 38% Protein. Fish fed on 38% protein diet showed better growth and feed conversion ratio than those fed on 28 and 18% diets. Males matured earlier than females: the firstmature males were recorded when they were 5 months old, whereas the females matured after 6 month rearing period. The mean percentage of mature female fish rose with increasing feed protein level. It was also found that the percentage of mature fish rose with the increasing fish age and size. More than 70% males matured at the age of 6 months in all diet. After 10 months rearing period, the percentage of matured female fed on 38% protein was 100% while those fed on 16% protein was 25%. Smallest size at spawning of males and females was 8.5 cm (23 g) and 13 cm (65 g), respectively, and dietary protein levels influenced the size of fish at first maturity. It was found that the protein level significantly effected the gonado somatic index (GSI). Fecundity increased with increasing dietary protein level. The relative fecundity (eggs /g or cm female) was higher at the higher dietary protein level.
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    Teknologi Pembenihan Ikan Ma Li (Labeobarbus Festivus Heckel 1843) Dalam Rangka Menjaga Kelestariannya
    (2018-02-12) Aryani, Netti; Alawi, Hamdan
    Penelitian teknologi pembenihan ikan mali (Labeobarbus festivus Heckel 1843) telah dilakukan dari bulan April–November 2015. Ikan Mali dimatangkan di dalam karamba yang ditempatkan di pinggir Sungai Kampar Desa Padang Luas Kecamatan Tambang, Kabupaten Kampar Kanan, Riau. Proses pembenihan dilakukan secara buatan di Laboratorium Pembenihan dan Pemuliaan ikan Fakultas Perikanan dan Kelautan Universitas Riau. Tujuan penelitian untuk mengetahui dosis sGnRH terbaik pada pembenihan dan kelulushidupan larva ikan Mali dalam rangka menjaga kelestarian ikan tersebut di masa yang akan datang. Parameter yang diukur yaitu Waktu laten, Jumlah telur yang diovulasikan, Diameter telur, Indek Ovi Somatik (IOS), Derajat penetasan telur dan Kelulushidupan larva. Penelitian menggunakan Rancangan Acak Lengkap dengan empat perlakuan dan tiga kali ulangan. Perlakuan P0=penyuntikan 0,2 ml NaCl Fisiologis/kg bobot tubuh (kontrol) ; P2= penyuntikan sGnRH 0,5 ml/kg bobot tubuh; P3=penyuntikan sGnRH 0,7 ml/kg bobot tubuh dan P4=penyuntikan sGnRH 0,9 ml/kg bobot tubuh. Hasil penelitian diperoleh dosis 0,7 ml/kg bobot tubuh merupakan dosis terbaik dengan waktu laten 5 jam 32 menit, Jumlah telur yang diovulasikan 303 butir/g bobot induk, diameter telur 0,9 mm, Indeks Ovi Somatik 20,15 %, daya tetas 14,85 % dan Kelulushidupan larva 38,07 %.