e-Journal BUDIDAYA PERAIRAN

Penggunaan tepung daun kelor (Moringa oleifera) berbeda komposisi dalam formulasi pakan bagi pertumbuhan ikan nila (Oreochromis niloticus)

Doni F. Pamula — 2024-08-09

Several previous studies regarding the use of Moringa leaf flour on fish had been carried out fish consumption including catfish, tilapia, and gourami. The objectives of this research were to determine the effect of substitution of Moringa leaf flour at different doses in feed formulation on the relative growth of tilapia and determine which treatment had the highest feed efficiency value. The results showed relative weight growth value for tilapia were obtained in treatment C (83.82%), daily growth (C) 2.03%, food conversion ratio (FCR) 1.29, and Feed Efficiency 77.01%.

Keywords: relative growth, daily growth, feed conversion ratio, feed efficiency value.

Kajian perubahan warna gonad kerang mutiara hitam Pinctada margaritifera berdasarkan ukuran cangkang di perairan Teluk Talengen, Kepulauan Sangihe

Frisley Rici Bawekes — 2024-08-09

The black pearl oyster Pinctada margaritifera (Linnaeus, 1758) or black lip pearl oyster is a marine bivalve with important economic value. P. margaritifera is a protandrous hermaphroditic species. Externally it is difficult to differentiate between male and female gonads. This research aimed to determine differences in gonad color and determine the sex of P. margaritifera based on shell size. The test animals used in this research were black pearl mussels P. margaritifera totaling 33 samples taken from Talengen Bay, Sangihe Islands Regency, North Sulawesi. The results of morphometric measurements showed the average shell length was 103.16 mm, where the maximum shell length was 131.61 mm and the minimum was 81.29 mm. The average shell width was 105.65 (max 141.17 mm-min 83.21mm), the average shell thickness was 32.46 mm (max 44.36, min 20.11mm). The gonads were white and slightly yellow in 24 males and yellow in 9 females. P. margaritifera with a shell length of 90-130 mm was found to be female, and most were 110-120 mm in size. Meanwhile, shell lengths <80 mm and 110-130 mm male pearl oysters were still found.

Keywords: marine bivalve, growth rate, morphometric, shell length

Produksi Eucheuma spp. di Sentra Akuakultur Provinsi Sulawesi Utara tahun 2023

Yosua Usoh — 2024-09-20

This study aimed to determine the seaweed production in North Sulawesi Province in 2023 and to find out the technical and non-technical factors that affect Eucheuma production in North Sulawesi. Data were collected by a survey through questionnaires, from existing records at related institutions as well as direct interviews with the farmers. The results showed that the total Eucheuma production in North Sulawesi Province in 2023 only came from the production in North Minahasa Regency, namely Nain Village as much as 473.76 tons, Nain Satu was 234.36 tons and Mantehage II Tangkasi was 131.4 tons. Thus, the total seaweed production for North Sulawesi province for 2023 was 839.52 tons. Technical and non-technical factors that influenced production were the lack quality of seaweed seeds, polluted sea waters, unpredictable weather, pests and disease attacks that have not been resolved, lack of adequate cultivation facilities and infrastructure, lack of qualified human resources (HR), limited capital and seaweed prices.

Keywords: Seaweed, Nain Induk, Nain Satu, Mantehage II Tangkasi.

Fluktuasi parameter kualitas air di tambak super intensif udang vaname: Studi kasus pertambakan PT. Pillar Persada Parigi, Desa Bajo, Minahasa Selatan

Beatus H. Telaumbanua — 2024-09-20

The aim of this research was to determine the physical and chemical parameters of water quality in vanname shrimp culture in Pond PT. Pillar Persada Parigi, Bajo Village, South Minahasa. This research uses direct measurement methods in the field (In situ) and sample analysis in the laboratory. Water quality parameters measured in the field included temperature, degree of acidity (pH), salinity, dissolved oxygen, while ammonia, nitrite, nitrate, phosphate was analyzed at the Manado Industrial Research and Standardization Center. Water sampling and in-situ measurements were carried out in 4 ponds selected randomly from the ponds that were temporarily operating at the time of sampling. Based on the results of measurements of several physical and chemical parameters of water quality, both directly in the field (in situ) and the results of laboratory analysis of pond water samples from PT Pillar Persada Parigi, Bajo Village, South Minahasa Regency, a temperature range of 27 - 32˚C, salinity of 36 ppt was obtained. , dissolved oxygen 3.63 - 7.8 ppm, acidity degree (pH) 7.6 - 8.6, ammonia content 1 mg/L, nitrite <0.2757 mg/L, nitrate 5 mg/L, phosphate <0 .0027 – 1 mg/L. All parameters measured were still considered suitable for survival and supporting the growth of the vaname shrimp being cultured

Keywords: vaname shrimp, dissolved oxygen, ammonia, nitrate