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All Journal Jurnal Penelitian Perikanan Indonesia Jurnal Segara
Reny Puspasari
Center for Fisheries Research and Development
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology

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PENGARUH ENSO TERHADAP LINGKUNGAN PERAIRAN DAN PERIKANAN DI PERAIRAN SULAWESI UTARA Reny Puspasari; Setya Triharyuni; Taufiq Alimi; Stuart J. Campbell; Raymond Jakub; Wahid Suherfian; Emilio de la Rosa; Haris Setiawan
Jurnal Penelitian Perikanan Indonesia Vol 27, No 2 (2021): (Juni) 2021
Publisher : Pusat Riset Perikanan, BRSDM KP.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jppi.27.2.2021.%p

Abstract

Perairan Sulawesi Utara memiliki potensi perikanan yang tinggi dan menjadi lintasan arus lintas Indonesia (arlindo) diduga mendapatkan pengaruh dari kejadian ENSO. Kajian ini dilakukan untuk menganalisis hubungan antara fenomena ENSO dengan kondisi perairan dan perikanan di wilayah perairan Sulawesi Utara.  Analisis dilakukan  dengan menggunakan analisis korelasi, regresi berganda model Cob Douglass dengan metode OLS dan WLS.  Hasil penelitian menunjukkan bahwa fenomena ENSO berkorelasi dengan perubahan nilai anomali suhu perairan, salinitas dan konsentrasi klorofil-a.  CPUE ikan karang dan beberapa ikan pelagis kecil naik ketika periode La Nina. Hubungan variabilitas lingkungan dan ENSO pada nilai CPUE ikan pelagis kecil dan ikan karang menunjukkan bahwa variabel salinitas permukaan merupakan variabel yang paling berpengaruh pada nilai CPUE ikan pelagis kecil dengan  hubungan yang positif sedangkan untuk CPUE ikan karang sangat dipengaruhi oleh variabel salinitas kolom air dengan hubungan yang negatif.Sulawesi Sea has a high potency of fisheries, this area has become an entrance of Indonesia through flow (ITF) and has been affected by ENSO. The objective of the study is to analyze the correlation between ENSO and the dynamic of environment conditions and fisheries.  The analysis was conducted by using correlation  and multiple regression analysis of the Cob Douglass model using the OLS and WLS methods. The results showed that the ENSO correlates with the anomaly of subsurface temperature, salinity and chlorophyll-a concentration CPUE of reef fish and several species of small pelagic fish increased when La Nina occurs. Surface salinity is the most influential variable on the CPUE of small pelagic fish with a positive relationship. CPUE of reef fish is strongly influenced by the sub surface salinity variable with a negative relationship.
The Effectiveness of Artificial Reefs in Improving Ecosystem Health to Increase Coral Reef Resilience Reny Puspasari; Ngurah Nyoman Wiadnyana; Sri Turni Hartati; Rita Rachmawati; Yunaldi Yahya
Jurnal Segara Vol 16, No 2 (2020): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (691.982 KB) | DOI: 10.15578/segara.v16i2.9093

Abstract

Some coral bleaching phenomena related to climate variability (ENSO or IOD) lead to coral mortality resulting in ecosystem damage and decreased ecosystem health.  The artificial reef is one of the management efforts adopted by stakeholders to restore coral reef conditions. Thriving artificial reefs could extend coral coverage and provide a new habitat for several marine organisms and divert anthropogenic pressure on natural coral ecosystems. The current research aims to identify the impact of artificial reef installment on ecosystems and fisheries. Three indicators for health coral reef ecosystems were determined: increased coral cover, biofouling organism, and fish abundance and diversity. An index to measure the artificial reef impacts on fisheries is fish production after installment.  Data collection was done in 2017 in around Bali area, including the occurrence of coral bleaching, the number of artificial reefs installed, and the case of positive impacts of artificial reefs.  The data were analyzed to measure any changes that occurred after the artificial reef installment.  The results show that an artificial reef installment has a significant impact on increasing coral cover, fouling organisms, and fish abundance and species richness.  The new community structure development varies among the artificial reef depend on the environmental condition.  However, the impact of artificial reef installment could not be directly quantified on fish production due to unavailability monitoring data.
THE IMPACT OF ENVIRONMENTAL CHANGING, FOOD AVAILABILITY AND ANTROPOGENIC PRESSURE ON SARDINE (Sardinella lemuru) CPUE IN BALI STRAIT WATERS Reny Puspasari; Puput Fitri Rachmawati; Eko Susilo; wijopriono wijopriono; Ngurah Nyoman Wiadnyana
Jurnal Segara Vol 14, No 2 (2018): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (931.545 KB) | DOI: 10.15578/segara.v14i2.7131

Abstract

As a dominant small pelagic fishery in Bali Strait waters, significant decrease of sardine (lemuru) production was bothering fisheries industries, particularly in Muncar and Pengambengan District in East Java and Bali province.  Besides of over exploitation, changing environment condition such as temperature, salinity and thermocline depth, indicated the affect on decreasing of sardine production.  The interaction among environment variabels, food source availability (Chl-a) and anthropogenic pressure (fishing effort) generate the number of sardine abundance showed by CPUE (Catch per Unit Effort) value that determined sardine production. The current research aims to analyze the simultant impact of changing environment, food availability and antropogenic pressure on sardine CPUE.   Field research was conducted in Bali Strait where primary and secondary fisheries data were gathered at Muncar Fishing Port of Banyuwangi District East Java Province and Pengambengan Fishing Port of Jembrana District Bali Province.  Oceanography data such as temperature, salinity, and chlorophyll-a profile were collected from INDESO Model. Data analysis was done by time series analysis of each variabels such as CPUE, SST and SSTA, thermocline depth, chl-a and also the number of trip.  Partially analysis of those variabels was done by overlayed one another, and principal component analysis determined to analyze the effect of all those varibales simultaneously on sardine CPUE.  Results show that there were an influenced of regional climate phenomenon on the dynamic of environment condition of Bali Strait waters, particularly IOD (Indian Ocean Dipole).  The CPUE of sardine was determined by the interaction of environment variabels (SST/SSTA, salinity, thermocline depth), food source availabity (Chl-a) and antropogenic pressure (fishing trip) simultaneously, however SSTA gives a significant negative correlation on CPUE.  Regional climate phenomenon might cause an extreme condition in Bali strait waters leading to unstable environment for sardine habitat.  Drastically changing habitat condition occured under influenced of extreme condition would lead to disruption of sardine CPUE.
Co-Authors Eko Susilo Emilio de la Rosa Haris Setiawan Ngurah Nyoman Wiadnyana Puput Fitri Rachmawati Raymond Jakub Rita Rachmawati Setya Triharyuni Sri Turni Hartati Stuart J. Campbell Taufiq Alimi Wahid Suherfian wijopriono wijopriono Yunaldi Yahya