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Invasive Aquatic Animal Species in Indonesia: A Review Salsabila, Salma; Putri, Valentina Yasmin Nursyah; Bagaskara, Ragil Damar; Putri, Noviana Pratama; Khoirinisa, Fitri; Margaretha, Argya; Vauzcika, Aura Nur; Ero, Sisilia Theresia Yuliani; Wiranti, Dinda Devina Putri; Syabani, Fahmi Rahman; Rahayu, Siti Mira; Sanjayasari, Dyahruri; Hutabarat, Philipus
MAIYAH Vol 3 No 4 (2024): Maiyah : Vol. 3 No. 4 Desember 2024
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.maiyah.2024.3.4.13946

This study examines the impact of invasive fish species in Indonesia, which is an important issue in efforts to maintain the sustainability of aquatic ecosystems. This study aims to identify existing non native fish species and evaluate their impact on local biodiversity. The methods used included a literature review and field surveys to collect data on the distribution of invasive species. The results showed that invasive species not only threaten the existence of native species, but also disrupt the overall balance of the ecosystem. The findings highlight the importance of effective management to prevent the further spread of invasive species, as well as the need for increased public awareness of their negative impacts. This research is expected to contribute to the development of better aquatic resource management strategies.

Spatial Variability of Nutrients and Chlorophyll-A as Contributing Factors of Trophic Condition in Kendari Bay, Southeast Sulawesi Rahayu, Siti Mira; Azzahra, Mutiah; Irawan, Hendra; Salwiyah, Salwiyah; Sari, Iya Purnama; Alsita, Indah; Bramana, Aditya; Maulita, Mira
Jurnal Kelautan Tropis Vol 28, No 2 (2025): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v28i2.26579

Estuaries and coastal waters are heavily influenced by anthropogenic activities and environmental factors, which can lead to ecosystem degradation, increased nutrients, and the risk of eutrophication. Kendari Bay, with its complex hydrodynamic conditions and various human activities in the vicinity, requires an analysis of the distribution of nutrients and chlorophyll-a (chl-a) to estimate the potential for eutrophication and its impact on aquatic ecosystems. This research was conducted in March-May 2023 at six stations in Kendari Bay. The distribution of nutrients in Kendari Bay revealed a varied pattern, with DIN concentrations higher in the “neck area” or narrow parts of the bay, phosphates more concentrated in the inner part due to slow water flow, and silica more abundant in estuaries because it comes from weathering rocks carried by river flows. Chl-a concentration tended to correspond DIN pattern, suggesting that phytoplankton growth was more influenced by nitrogen nutrients than phosphorus nutrients, as supported by an N:P ratio of less than 16. Overall, Kendari Bay was classified as mesotrophic with a relatively uniform trophic level due to morphological and hydrodynamic characteristics that narrow towards the sea and a low flushing rate. A comprehensive approach to managing human activities from upstream to downstream must be performed effectively to protect the bay area from eutrophication and environmental decline due to excessive nutrient runoff from land-based activities.

Biological aspects of squid (Loligo edulis) in the waters of Eastern North Sumatra, Indonesia Zulkifli, Dadan; Suharti, Ratna; Sihombing, Yuni Fast Track Anjeli; Jabbar, Meuthia Aula; Rahayu, Siti Mira; Bramana, Aditya; Irawan, Hendra; Aulia, Deni
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 12, No 1 (2023): APRIL 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.1.28602

Squid is one of the non-fish resources that have economic value and is a target species in demersal fisheries activities with squid fishing gear and stick-held deep net. This research aims to determine the biological aspects of squid (Loligo edulis) such as length frequency distribution, length-weight relationship, sex ratio, gonadal maturity level, gonadal maturity index, size at first caught, and size at first maturity of the gonads. The method used in this research was a descriptive survey. The sample collection method used systematic random sampling and purposive sampling techniques. This observation was carried out on March 7 to July 30, 2022, at the Belawan Ocean Fishing Port and Tanjung Balai Port. The results showed that the average length distribution of squid was 17.73 cm. The relationship between the length and weight of squid is negative allometric. The sex ratio is 1:1.05. The negative allometric growth pattern is dominated by Gonadal Maturity Level (GML) I and GML II. The highest GML value for male squid was 2.06% at GML III, and the highest GML value for female squid was 1.92% at GML III. The average size of the caught squid length (Lc) is 10.42 cm. The size of the first gonad maturity (Lc) was 13.32 cm.Keywords:SquidBiological aspectsFisheries aspectManagement effort

Variation of nitrate concentration and light level on growth rate of diatom Chaetoceros muelleri Rahayu, Siti Mira; Damar, Ario; Krisanti, Majariana
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 9: No. 2 (August, 2022)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v9i2.6789

Microalgae are cultured as natural feed for the cultivation of mollusks, crustaceans (early larval stages), and zooplankton. Diatoms are phytoplankton groups commonly used as feed, one of which is Chaetoceros muelleri. This study aims to identify the optimal nitrate concentrations and light level (irradiance) for the growth rate of C. muelleri. Culture was placed in nitrate 1,330; 5,305; and 27,030 mg/L (N1, N2, N3, respectively); and light 50, 100, and 150 µmol/m2/s, with three replications for each treatment. The response variable observed was the growth rate of C. muelleri and nitrate uptake. Each nitrate treatment resulted in a significant difference in the growth rate of C. muelleri (LSD, p < 0.01). The N3 treatment produced the highest growth rate (average 0,188-0,193 cells/day), while N1 produced the lowest specific growth rate (average 0,149-0,157 /day). In light treatment, a significant difference was only seen in the light levelof 150 µmol/m2/s (LSD, p < 0.05) which produced the highest growth rate (average 0.157-0.193 cells/day), especially in the nitrate N1 and N2. Meanwhile based on the significance test, the interaction between nitrate and light treatment was not significant.Keywords: Chaetoceros muelleri; Growth rate; Irradiance; Nitrate

Biological aspects of squid (Loligo edulis) in the waters of Eastern North Sumatra, Indonesia Zulkifli, Dadan; Suharti, Ratna; Sihombing, Yuni Fast Track Anjeli; Jabbar, Meuthia Aula; Rahayu, Siti Mira; Bramana, Aditya; Irawan, Hendra; Aulia, Deni
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 12, No 1 (2023): APRIL 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.1.28602

Squid is one of the non-fish resources that have economic value and is a target species in demersal fisheries activities with squid fishing gear and stick-held deep net. This research aims to determine the biological aspects of squid (Loligo edulis) such as length frequency distribution, length-weight relationship, sex ratio, gonadal maturity level, gonadal maturity index, size at first caught, and size at first maturity of the gonads. The method used in this research was a descriptive survey. The sample collection method used systematic random sampling and purposive sampling techniques. This observation was carried out on March 7 to July 30, 2022, at the Belawan Ocean Fishing Port and Tanjung Balai Port. The results showed that the average length distribution of squid was 17.73 cm. The relationship between the length and weight of squid is negative allometric. The sex ratio is 1:1.05. The negative allometric growth pattern is dominated by Gonadal Maturity Level (GML) I and GML II. The highest GML value for male squid was 2.06% at GML III, and the highest GML value for female squid was 1.92% at GML III. The average size of the caught squid length (Lc) is 10.42 cm. The size of the first gonad maturity (Lc) was 13.32 cm.Keywords:SquidBiological aspectsFisheries aspectManagement effort

TEMPORAL ANALYSIS OF THE PRODUCTIVITY OF THE DOMINANT CAPTURE FISHERIES COMMODITY (CASE IN THE SOUTHERN WATERS OF THE SPECIAL REGION OF YOGYAKARTA – WPP NRI 573) Prakoso, Bagas; Suyasa, I Nyoman; Rahayu, Siti Mira
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15246

Climate variations can affect sea surface temperature (SST), feed distribution, and fish habitat. Temporal analysis of SPL and chlorophyll-a can help identify the impact of climate change on capture fisheries productivity. This study aims to analyze the relationship between chlorophyll-a and sea surface temperature (SST) on the productivity of dominant capture fishery commodities in the southern waters of the Special Region of Yogyakarta I-FMA 573. Fisheries productivity data on five dominant fish species at the research site (yellowfin tuna (Thunnus albacares), skipjack tuna (Katsuwonus pelamis), savalai hairtail (Trichiurus savala), Indian scad (Decapterus russelli), and common dolphinfish (Coryphaena hippurus)) in 2014-2023 were collected from PPP Sadeng. Chlorophyll-a and SST data for 2014-2023 were obtained from Aqua Modis multisensory satellite imagery. The data was classified based on the four seasons in Indonesia allowing analysis of seasonal changes affecting fisheries productivity. Skipjack tuna has the highest productivity, with an average of 410,803 kg/trip, while common dolphinfish has the lowest productivity, with an average of 29,521 kg/trip. Based on the results of multiple linear regression, chlorophyll-a and SST had a significant effect on the productivity of yellowfin tuna, skipjack tuna, Indian scad, and common dolphinfish, so that chlorophyll-a and SST may indicate the presence of these fish populations. Meanwhile, savalai hairtail are not significantly affected by chlorophyll-a and SST, because many environmental factors affect including monsoon winds, currents, and rainfall.

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