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Ngantu, Robertus
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Veterinary

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PARAMETER FISIKA DAN KIMIA AIR DI DANAU SENTANI DISTRIK WAIBU KABUPATEN JAYAPURA PROVINSI PAPUA. Ngantu, Robertus; Boma, Darius
Jurnal Pertanian Terpadu Santo Thomas Aquinas Vol. 2 No. 1 (2023): Jurnal Pertanian Terpadu Santo Thomas Aquinas
Publisher : STIPER Santo Thomas Aquinas Jayapura

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This study aims to determine the condition of physical and chemical water quality in the waters of Lake Sentani, Waibu District, Jayapura Regency. The method used in this study is a normative survey method, which is a method used to observe certain objects or conditions, which are nothing but intended to make systematic descriptions, pictures or drawings, of data or facts and characteristics in relation to the information provided. obtained by setting in a certain standard or norm. Data collected, processed and presented descriptively. The results showed that physical water quality parameters, water temperature ranged from 28.4 – 30.2 to 30.3 oC, turbidity 4.10 – 4.20 to 4.90 NTU, TDS ranged from 119.0 – 129.0 up to 132.0 mg/l and TSS ranged from 82.0 – 82.0- to 96.0 mg/L and non-metallic inorganic chemical water quality parameters, the degree of acidity (pH) ranged from 7.53 – 7.55 to 7.81mg/l, dissolved oxygen (DO) ranged from 6.02 – 6.10 to 6.50 mg/L, biochemical oxygen demand (BOD) ranged from 1.72 – 2.64 to 2.90 mg/L , nitrite (NO2-N) ranged from 0.004 – 0.004 to 0.004 mg/L and phosphate (PO4-P) ranged from 0.53 – 0.97 to 1.02 mg/L. From the results of this study it can be concluded that the physical quality and the water chemistry of Sentani Lake waters at the study site is still in the optimal range or suitable for aquaculture activities in Sentani Lake waters.
Pengaruh lama Perendaman Hormon Methyltestosteron terhadap Maskulinisasi ikan Nila (Oreochromis niloticus) Ngantu, Robertus; Sitaniapessy, Jolanda
Jurnal Pertanian Terpadu Santo Thomas Aquinas Vol. 2 No. 1 (2023): Jurnal Pertanian Terpadu Santo Thomas Aquinas
Publisher : STIPER Santo Thomas Aquinas Jayapura

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Masculinization is an attempt to increase the number of male fish or direct fish to become male. This is because reproduction energy is diverted to somatic growth. Monosex production of males using the hormone metyltestosterone is reported to be most effective using the larval immersion method during the sex differentation or critical period, in which the larval brain is still a biopotential state directing the formation of sexes in morphology, behaviour and function. Immersion is one of the methods used for male sex change apart from oral (feeding) and injection. Soaking the tilapia larval stage at the age of 10 and 14 days with 1,800 ug/LMT for 4 and 8 hours produced 91,6% and 98,3% of males. The study aimed to determine how long soaking of the larvae in the hormone methyltestosterone on the good masculinization of tilapia (Oreocrhomis niloticus) and what percentage of masculinization is in the larvae of tilapia (Oreocrhomis niloticus) using the hormone methyltestosterone through immersion.The result of ANOVA calculation show that the difference in the duration of immersion with the hormone methyltestosterone sygnificantly affect the percentage of the number of male fish produced.
PENGGUNAAN TEPUNG AMPAS TAHU SEBAGAI PAKAN SUBSTITUSI BROILER PERIODE FINISHER Tharukliling, Selvia; Supartini, Nonok; Maruapey, Ajang; Ngantu, Robertus
Jurnal Pertanian Terpadu Santo Thomas Aquinas Vol. 3 No. 1 (2024): Jurnal Pertanian Terpadu Santo Thomas Aquinas
Publisher : STIPER Santo Thomas Aquinas Jayapura

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This research aims to determine the effect of tofu dregs flour levels on broiler finisher periods. Furthermore, it can be used as information about the use of tofu dregs flour as an efficient broiler finisher feed ingredient, however the resulting production remains good. This research was an experimental study using a completely randomized design (CRD). The treatment given was replacing the proportion of basal ration with tofu dregs flour, namely: R0 = 0% tofu dregs flour + 100% basal feed, R1 = 5% tofu pulp flour + 95% feed basal, R2 = 10% tofu dregs flour + 90% basal feed, R3 = 15% tofu dregs flour + 85% basal feed. The parameters observed were feed consumption, body weight gain, feed conversion. The use of tofu dregs flour at a percentage of 10% (R2) in the finisher period broiler ration resulted in the highest feed consumption, weight gain and the lowest value for feed conversion when compared with basal feed.
KAJIAN HABITAT DAN POPULASI KETAM KENARI (Birgus latro) DI PULAU YAMNA KABUPATEN SARMI PROVINSI PAPUA Yaboisembut, Zakarias; Lewaherilla, Niki Elistus; Ngantu, Robertus; Ikanubun, Marcela
Jurnal Pertanian Terpadu Santo Thomas Aquinas Vol. 4 No. 1 (2025): Jurnal Pertanian Terpadu Santo Thomas Aquinas
Publisher : STIPER Santo Thomas Aquinas Jayapura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.15674642

Abstract

Salah satu potensi sumber daya perikanan dengan nilai ekonomisnya cukup tinggi yaitu Kepiting kenari (Birgus latro) yang hampir punah dari habitatnya, maka untuk itu perlu melakukan penanganan yang serius dalam hal perlindungan, pelestarian dan pengembangannya. Kepiting kenari (Birgus latro) merupakan salah satu hewan liar (wildlife) yang hidup di laut pada saat stadia larva dan juvenil, sedangkan pada saat stadia muda dan dewasa lebih banyak menghabiskan hidupnya di daratan, sehingga binatang ini lebih dikenal sebagai kepiting darat yang aktif mencari makan pada malam hari. Kepiting kenari atau ketam kenari dikenal juga sebagai kepiting pencuri (robber crab) karena sering mencuri kelapa sebagai makanannya. Penelitian ini bertujuan untuk mengetahui habitat dan populasi, mengetahui padat sebaran populasi ketam kenari (Birgus latro) yang berada di Pulau Yamna Kampung Yamna Distrik Pantai Timur Kabupaten Sarmi. Penelitian ini dilaksanakan pada bulan Juli-Oktober Tahun 2023 di Pulau Yamna, Kabupaten Sarmi, Provinsi Papua. penelitian menggunakan metode survei, dengan cara menyisir atau menjelajah pada lokasi penelitian secara langsung di setiap stasiun pengambilan sampel. Dan untuk pengumpulan data di lapangan menggunakan teknik simple random sampling atau teknik acak sederhana. Data ketam kenari yang di tangkap pada tujuh stasiun penelitian tersebut, di analisis secara kualitatif dan kuantitatif. Analisis kualitatif dengan melakukan pendeskripsian ciri morfologi spesies Ketam kenari (Birgus latro) dengan mencantumkan nama ilmiahnya dan disajikan dalam bentuk tabel, grafik disertai gambar. Hasil penelitian di Pulau Yamna menunjukkan bahwa habitat dan populasi ketam kenari yang di tangkap berjumlah 24 ekor; terdiri dari 11 ekor Jantan dan 13 ekor Betina. Berdasarkan hasil estimasi populasi ketam kenari bahwa di stasiun III dan stasiun V memiliki padat populasi tertinggi. Ketam kenari menyukai tekstur substrat tanah berbatu dan lembab. Berdasarkan hasil analisis indeks morisita, maka pola sebaran Ketam kenari di Pulau Yamna Distrik Pantai Timur Kabupaten Sarmi didominasi oleh pola sebaran seragam. Ketam kenari menyukai daerah yang lembab dan vegetasi yang tersedia banyak makanan. Pertambahan panjang karapaks lebih cepat dari pertambahan berat badannya.
Co-Authors Boma, Darius Ikanubun, Marcela Lewaherilla, Niki Elistus Maruapey, Ajang Nonok Supartini Sitaniapessy, Jolanda Tharukliling, Selvia Yaboisembut, Zakarias