Pengaruh merkuri nitrat [Hg (NO3)2] dengan konsentrasi berbeda terhadap benih ikan kakap putih (Lates calcarifer Bloch): histologi insang

Banyaknya industri yang berkembang dewasa menyebabkan meningkatnya kadar logam berat seperti merkuri dalam perairan. Penelitian ini bertujuan untuk mengetahui pengaruh [Hg (NO3)2] dengan konsentrasi yang berbeda terhadap benih ikan kakap putih (L. calcarifer): histologi insang. Dalam penelitian ini, ikan dipaparkan dengan konsentrasi 3,16 x 10-2 ppm, 9,99 x 10-2 ppm, 3,16 x 10-1 ppm dan 9,97 x 10-1 ppm. Total ikan yang digunakan untuk histologi adalah 15 ekor. Hasil penelitian menunjukkan bahwa semakin tinggi konsentrasi [Hg (NO3)2] maka kerusakan pada jaringan insang ikan juga akan meningkat dan mempercepat waktu kematian ikan. Kerusakan yang terjadi yaitu hipertropi dan hiperplasia pada sel epitel insang, fuse pada lamela sekunder dan haemorhage di insang pada konsentrasi [Hg (NO3)2] yang lebih tinggi.Many industries today lead to increased levels of heavy metals such as mercury in water. This research aims to determine the effect of different concentrations of [Hg (NO3) 2] to Asean Sea Bass (L. calcarifer): Gill Histology. In this study, this fishes was treated with 3,16 x 10-2 ppm, 9,99 x 10-2 ppm, 3,16 x 10-1 ppm, and 9,97 x 10-1 ppm. Total fishes used for histological study was 15 fishes. Results of this research showed that increasing the consentrations of the [Hg(NO3)2] will also increase the damage on the stomach structure and fasten the mortality time of the fish. Damage that occurs is hypertrophy and hyperplacia on epitel cells, fuse of secundary lamellae and haemorhage on gill that were exposed to high consentration of [Hg(NO3)2].

Efek surfaktan terhadap pertumbuhan, kelangsungan hidup dan struktur jaringan insang benih Ikan Nila (Oreochromis niloticus)

Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh surfaktan terhadap pertumbuhan, kelangsungan hidup dan histologi insang benih ikan nila. Penelitian dilaksanakan pada bulan Oktober hingga November 2014 diLaboratorium Hatchery dan Teknologi Program Studi Budidaya Perairan Fakultas Pertanian Universitas Malikussaleh Aceh Utara. Ikan diberi perlakuan dengan konsentrasi deterjen yang berbeda, perlakuan yang diberikan yaitu: perlakuan A (Kontrol), B (deterjen 3 %), C (Konsentrasi deterjen 6 %) dan D (Konsentrasi deterjen 9 %). Pengambilan data dilakukan setiap 7 hari sekali. Adapun rancangan yang digunakan pada penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 4 perlakuan 3 ulangan dan dilanjutkan dengan Uji Beda Nyata Jujur jika terdapat perbedaan. Parameter yang diamati adalah parameter pada laju pertumbuhan, kelangsungan hidup, histologi insang dan efisiensi pakan serta parameter kualitas air (suhu dan pH). Hasil penelitian menunjukkan bahwa ikan nila yang diberi perlakuan konsentrasi deterjen 3 %, 6 %, 9 % berpengaruh terhadap pertumbuhan dan kelangsungan hidup. Perlakuan kontrol menghasilkan nilai, laju pertumbuhan dan efisiensi paling baik, yaitu masing-masing sebesar 2,84 gram, 97,36 %, sedangkan untuk kelangsungan hidup menunjukkan hasil yang terbaik pada perlakuan konsentrasi deterjen 3 % yaitu 100 %. Parameter kualitas air selama penelitian yang diukur antara lain adalah suhu air dengan kisaran 26,6-28,1 ᵒC, dan pH 7,1-7,8. This study aimed to know the effect of surfactant on growth, survival rate and gill histology of tilapia fingerling. It carried out on October to November 2014 at Hatchery and Aquaculture Technology Laboratory, Aquaculture Department Agriculture Faculty Malikussaleh University North Aceh. Experimented fish was given different concentrations of detergent. The treatments were A: control, B (detergent 3%), C (detergent 6%), and D (detergent 9%). Sampling data was done every seven days. Experimental design used was Completely Randomized Design with four treatments and three replications then it was continued by BNT test. Observed parameters were growth rate, survival rate, gill histology, feed efficiency, and water quality (temperature and pH). The result showed that different concentrations of detergent (3%, 6%, 9%) affected on growth and survival rate of tilapia fish. Control gave the best growth rate and feed efficiency which were 2,84 grams and 97,36%. While the highest survival rate was obtained in treatment of detergent 3% which was 100%. The water quality parameters during experiment were temperature ranged 26,6-28,1 ᵒC and pH ranged 7,1-7,8.

Gill histology of Nile tilapia Oreochromis niloticus following chronic and acute exposure to ammonia

Ammonia is a common aquatic pollutant and is toxic to fish. The main nitrogenous compound excreted by fish is also ammonia, which may reach toxic concentrations in high-density fish culture, reducing growth and productivity. In this study, changes in gill structure and mucus cell distribution were examined when juvenile Nile tilapia, Oreochromis niloticus, were exposed to chronic and acute concentrations of ammonia. For chronic exposure, the tilapia were exposed to daily increments in ammonia concentration rising from 0 mg L-1 ammonia on Day 0 to 5 mg L-1 by Day 8; the experiment was terminated on Day 9. There were obvious histopathological changes to the gills over this period including hypertrophy and fusion and of the secondary lamellae. The mucus cell number in gill histology sections were observed to increase until Day 6 then decrease thereafter until the termination of the trial. For the acute exposure, juvenile tilapia were exposed to 5 mg L-1 ammonia for 5 hours. Hourly changes to the gills were monitored, with notable changes to gill filaments and an observed increase in the mucus cell number over the duration of the experiment.