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Journal : Gema Agro

Kesehatan Ikan, Identifikasi, dan Analisis Prevalensi Parasit Ikan di Danau Buyan, Buleleng Bali Reboin Sitompul; Sang Ayu Made Putri Suryani; I Wayan Arya
GEMA AGRO Vol 24 No 2 (2019)
Publisher : Fakultas Pertanian, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.758 KB) | DOI: 10.22225/ga.24.2.1709.120~128

Abstract

This study aims to determine the condition factor (FK) of fish that live wildly on Lake Buyan and record the types of fish parasites that exist, by identifying parasites in fish samples caught by fishers both fishing with fishing rods and with nets. Then counting prevalence of types of parasites found.This study uses the descriptive exploitative research method, namely by conducting a series of observational activities on the object under study in this case are the fish that are on Lake Buyan both fish that have economic value and wild fish that have no economic value. Data retrieval techniques in this study were carried out by direct observation or observation of objects studied in the field, and microscope observations in the laboratory on sample fish. The condition factor (FK) is different for each type of fish and there is a decrease in FK in each fish, namely the observation period in August 2018. Nilem fish has FK which is 1.66 (less healthy) compared to other fish.In this study nine species of parasites were identified in seven species of fish, while the parasites were: Dactyrogilus sp, Gyrodactilus sp, Tricodina sp, Vorticellasp, Oodinium sp, Saprolegniasp, Argulus sp, Lernaeasp, Icthyoptiriussp. All of which belong to the ectoparasites which attack the outside of the body of the fish such as skin, scales, fins, gills and head.The prevalence of each type of parasite varies for each type and each observation period. The highest prevalence in June was Tricodina sp with a value of 5.71%. In July the highest was Saprolegnia sp 8.57%, in August the highest was Saprolegnia sp and Lernaea sp which amounted to 10%.
Analisis Kelimpahan Dan Indeks Saprobitas Fitoplankton Pada Ekosistem Padang Lamun Di Pantai Sindhu, Sanur, Bali Sang Ayu Made Putri Suryani; Laras Syahrani; I Wayan Arya
GEMA AGRO Vol 27 No 1 (2022)
Publisher : Fakultas Pertanian, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.446 KB) | DOI: 10.22225/ga.27.1.4982.12-21

Abstract

Abstract Sindhu Beach is one of the beaches in the Sanur area that is used for various economic activities, such as recreational locations or marine tourism by involving many stakeholders that can affect the aquatic environment which is the habitat of marine biota, is phytoplankton. In addition, the presence of seagrass also affects the abundance and saprobity index of phytoplankton. The research was conducted in May 2021 at Sindhu Beach and the identification process was carried out in the laboratory of the Faculty of Agriculture, Warmadewa University. The method used is the descriptive method. There were 20 types of phytoplankton from five classes, namely Chlorophyceae, Diatomae, Bacillariophyceae, Cyanophyceae, and Dinophyceae classes. The highest abundance of phytoplankton in the third observation was 206.369 ind/l at Station 1 and the lowest at the third observation was 152.866 ind/l at Station 2. At Station 1, the lowest water saprobic index was 0.047 in the first observation, followed by the second observation at 0.130, and the highest at the observation third at 0.307. This value is included in the moderately polluted category. At Station 2, the lowest water saprobic index in the first observation was -0.538, followed by the second observation at 0.28 and the highest at the third observation at 0.523. This value is included in the category of lightly polluted. At Station 3, the lowest water saprobic index in the first observation was 0.307, followed by the second observation at 0.615 and the highest at 0.739. This value is included in the category of lightly polluted.
Pengaruh Kepadatan Dan Size Ikan Terhadap Sintasan Benih Ikan Nila (Oreochromis Niloticus) Pada Pengangkutan Sistem Semi Terbuka Ketut Caraka Bagus Sewaka; Dewa Gede Semara Edi; Sang Ayu Made Putri Suryani
GEMA AGRO Vol 29 No 1 (2024)
Publisher : Fakultas Pertanian, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/ga.29.1.8966.33-41

Abstract

Transportation of fish seeds is the best way to move fish seeds from farmers to buyers. Proper transportation of live tilapia fish can ensure that the fish remain alive, healthy and fresh until their destination. The aim of this research is to determine the effect of density and size on fish seed catch in tilapia seed transport and to determine the interaction between density and size on tilapia seed catch in semi-open transport. Research location: Transportation was carried out from the seed source at the tilapia hatchery business in Patas Village, Gerokgak District, Buleleng Regency and ended at the Mina Anakan Jepun Fish Cultivator Group, Bebetin Village, Sawan District, Buleleng Regency, Patas, Gerokgak District, Buleleng Regency, Bali. This research used a Completely Randomized Design (CRD) with a factorial pattern with 2 factors consisting of Factor 1, namely fish density consisting of 3 levels, namely 50 fish/liter, 75 fish/liter, and 100 fish/liter. Factor 2 is the size of the fish which consists of 3 levels, namely 5-6 cm, 7-8 cm, 9-10 cm. Based on the results of treatment research, the density of fish numbers and fish size showed a very significant influence (P<0.01) on the survival rate of tilapia fry during semi-open transportation. The interaction between fish density and fish size showed no significant effect (P>0.05) on the survival rate of tilapia fish seedlings. A fish density of 100 fish/liter and a fish size of 5-7 cm resulted in the highest survival of tilapia fry during semi-open transportation.