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Ken Suwartimah
Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro
Earth & Planetary Sciences

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Pengaruh Penambahan Nitrogen dengan Konsentrasi yang Berbeda terhadap Laju Pertumbuhan Rumput Laut Caulerpa racemosa var. uvifera Budiyani, Felycia Belri; Suwartimah, Ken; Sunaryo, Sunaryo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (239.528 KB) | DOI: 10.14710/jmr.v1i1.881

Abstract

Caulerpa racemosa is a type of seaweed that has potentially to be cultivated because very popular and liked by most peoples. Japan and Philipines made the C. racemosa as one of the aquaculture commodities. C. racemosa culturing has not been done in Indonesia. Usually people just take directly from nature thus diminishing its presence in nature. Seaweed farming important to be done to inhance the production of seaweed. This study was conducted in May - July 2011 in a wet lab, University of Diponegoro Marine Station Teluk Awur, Jepara. The research method used an experimental method with a completely randomized design. This study used four treatments and one control, each of which was repeated three times. Rearing media using sea water plus nitrogen with different concentrations, namely: A (0 μM), B (50 μM), C (100 μM), D (150 μM) and E (200 μM). The results showed that the addition of urea nitrogen was significant difference on the growth of C. racemosa var. uvifera (p <0.01). The average of weight gain of C. racemosa var. uvifera for 42 days, as follows: A = 3.38 ± 0.089 g, B = 3.46 ± 0.14 g; C = 3.59 ± 0.18 g; D = 3.44 ± 0.11 g and E = 3.42 ± 0.10 g. Specific growth rate of C. racemosa var. uvifera generated during the study, namely: A 0.60 ± 0.015 % per day; B of 0.94 ± 0.012% per day; C of 1.36 ± 0.024% per day; D of 0.84 ± 0.026% per day and E of 0.75 ± 0.028% per day. The lowest specific growth rate of C. racemosa var. uvifera was reached on the treatment of A and the highest in the treatment of C.
Studi Biologi Cumi-Cumi Photololigo edulis yang Terdapat Di Perairan Pati Irfan, Moh Ali; Irwani, Irwani; Suwartimah, Ken
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.917 KB) | DOI: 10.14710/jmr.v7i3.25906

Abstract

ABSTRAK : Perairan laut di Kabupaten Pati mempunyai kekayaan sumberdaya jenis ikan dengan hasil tangkapan yang dominan dan bernilai ekonomis tinggi, salah satunya yakni cumi-cumi. Masih sedikit informasi ilmiah berkaitan dengan biologi cumi yang hidup di Perairan Pati yang tersedia, maka perlu dilakukan tentang studi biologi yaitu hubungan berat panjang, faktor kondisi, dan kebiasaan makan, untuk menjaga kelestarian sumberdaya cumi-cumi. Penelitian ini dilakukan dengan metode penelitian deskriptif, dimana pengambilan sampling berdasarkan metode pertimbangan (purposive sampling method). Materi penelitian ini adalah 178 ekor cumi-cumi (P. edulis) yang diperoleh dari pengepul di PPI Banyutowo. Sampling dilakukan 4 kali pada tanggal 3, 10, 19 dan 24 Agustus 2016. Analisis menggunakan hubungan berat panjang, faktor kondisi, dan kebiasaan makan cumi-cumi. Hasil penelitian ini menunjukkan nilai b 1,058 dan nilai a -0,560, cumi-cumi mempunyai sifat allometri negatif b<3. Nilai perhitungan faktor kondisi setiap pengambilan menunjukkan 0,94, 1,16, 0,95, 1,00. Analisis data yang diperoleh menunjukkan bahwa cumi-cumi P. edulis mempunyai kebiasaan makanan 4 jenis makanan, yakni ikan, krustasea, moluska, dan tak teridentifikasi. Makanan cumi-cumi yang mendominasi yakni ikan. ABSTRACT : Coastal waters in Pati has large potential  of  fish species are predominant and high economic value, one of these fish are squid. There is still few scientific information relating to the biology of squid that live in Coastal waters in Pati. It is necessary to study the biology of the relationship long weight, condition factor, and eating habits, to preserve the resources of squid. The research method used is the descriptive method, where the sampling is based on consideration of the method (purposive sampling method). This research material is 178 squid (P. edulis) obtained from collectors in PPI Banyutowo. Sampling is done four times on June 3, 10, 19 and August 24, 2016. The analysis uses heavy long relationship, condition factor, and the eating habits of squid. The results showed the value of b 1,058 and  value of a is -0.560, squid have the nature of a negative allometric b<3. The value of each retrieval condition factor calculation shows 0.94, 1.16, 0.95, 1.00. Analysis of data obtained showed that the squid P. edulis has a food habit four types of food which is a fish, crustaceans, mollusks, and unidentified. The main food habits of squid dominated by fish. 
Co-Authors Felycia Belri Budiyani Irfan, Moh Ali Irwani Irwani Sunaryo Sunaryo