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All Journal Jurnal Dimensi Minda Baharu JPBIO (Jurnal Pendidikan Biologi) Jurnal Pembelajaran dan Biologi Nukleus BioEksakta : Jurnal Ilmiah Biologi Unsoed SIMBIOSA
Fauziah Syamsi, Fauziah
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Veterinary Other

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Population Structure and Anthropogenic Pressure of Sea Urchin Utilisation (Diadema setosum) on Shallow Coral Reefs of Dedap Island, Batam Manihuruk, Pitrin Octca; Efendi, Yarsi; Syamsi, Fauziah
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 3: Jurnal Pembelajaran Dan Biologi Nukleus September 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i3.7920

Abstract

Background: Diadema setosum is a key species in maintaining coral reef stability through its role in controlling algal growth. However, exploitation for consumption and trade of its gonads by coastal communities has generated anthropogenic pressures that threaten population sustainability. This study aims to assess the population structure and utilisation pressure on   D. setosum in the shallow coral ecosystem of Dedap Island, Batam City. Methodology: Observations were carried out at five stations using a 50-metre belt transect method with 5×5 m quadrat plots. Data were analysed through descriptive statistics to determine density and distribution, while correlation and regression analyses were applied to examine the influence of environmental parameters (temperature, dissolved oxygen, salinity, and pH). Structured quantitative interviews with local fishermen were conducted to obtain information on harvesting practices. Results: The population density ranged from 0.180 to 0.292 ind/m², with a clustered distribution pattern observed at stations farther from human activity. Regression results indicated that temperature significantly increased density, while dissolved oxygen and pH had significant negative effects. Fishermen reported daily harvesting during low tide with yields of 2–3 kg of gonads per person. These findings demonstrate exploitation pressure on D. setosum, underscoring the need for ecosystem-based management. Contribution: The novelty of this study lies in integrating ecological surveys with socio-economic data, offering comprehensive insights for locally adapted conservation strategies.
Density, Morphometrics, Length–Weight Relationship, and Condition Factors of Manila Clams (Ruditapes philippinarum) in Waters Batam City Andriani, Fety; Ramses, Ramses; Syamsi, Fauziah; Ismarti, Ismarti
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 12, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2026
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v12i1.8766

Abstract

Background: The Manila clam Ruditapes philippinarum is an economically important marine bivalve and a key component of coastal ecosystems. Environmental factors such as sedimentation, salinity fluctuations, and human activities may influence its abundance, growth, and physiological condition. This study aimed to assess the abundance, morphometric characteristics, length–weight relationship, and condition factor of R. philippinarum in the waters surrounding Sarang Island, Batam Plot. Methodology: Sampling was conducted at three intertidal stations—Tempayang Island, Piring Island, and Layang Island—using purposive manual collection within 3 plot observation. Shell length, height, and thickness were measured using digital calipers, and total weight was recorded with a digital balance. Growth patterns were analyzed using log–log regression, while condition factors (K and WR) were used to evaluate physiological status. Findings: 87 individuals of R. philippinarum were recorded at Station 1, 118 at Station 2, and 117 at Station 3. The shell length of Ruditapes philippinarum ranged from 15.2 to 42.6 mm across all sampling stations. The length–weight relationship showed a weak correlation (r = 0.145) with a low coefficient of determination (R² = 0.21%) and a negative allometric growth pattern (b = −0.3419). The WR value (121.81) indicated generally good physiological condition. Water quality parameters were generally within tolerance limits; however, stations with higher total dissolved solids and lower water transparency indicated increased turbidity, which was associated with relatively smaller shell sizes of R. philippinarum compared to stations with better water clarity. Overall, variations in abundance and size among stations were influenced by environmental differences, while the R. philippinarum population remained relatively healthy. Contributions: These findings provide baseline ecological information that can support future monitoring and sustainable management strategies for R. philippinarum resources in intertidal coastal ecosystems
Population structure and local utilization of spider conch (lambis lambis) in abang island waters, batam Airani, Rentik Nurisma; Efendi, Yarsi; Syamsi, Fauziah
JPBIO (Jurnal Pendidikan Biologi) Vol 11, No 1 (2026): April 2026
Publisher : STKIP Persada Khatulistiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/jpbio.v11i1.6013

Abstract

This study explores the population structure, spatial distribution, and community utilization of Lambis lambis on Abang Island as a foundation for species conservation and community-based management. The research aims to examine the population structure and distribution patterns of Lambis lambis as well as its utilization by fishing communities on Abang Island, Batam. Data were collected using a 50-meter quadrat transect method with observation plots measuring 5 m × 5 m, along with measurements of environmental parameters (dissolved oxygen, temperature, and salinity). The results indicate low population density (0.012–0.028 ind/m²) and a clustered distribution pattern (Morisita Index > 1). A positive correlation was found between dissolved oxygen and population density, while high temperature showed a negative correlation. These findings suggest that environmental pressure and exploitation influence the spatial distribution of Lambis lambis. This study provides a scientific basis for community-based management and species conservation.
Co-Authors Airani, Rentik Nurisma Alfajri, Desman Amelia Amelia Andriani, Fety Ardiansyah, Rio Destaria Sudirman Nurhaty, Destaria Sudirman Dini Anggraini, Dini Erwin Ashari, Erwin Fenny Agustina, Fenny Ismarti Ismarti, Ismarti Lani Puspita, Lani Manihuruk, Pitrin Octca Masni Masni Nurhaty Purnama Sari, Nurhaty Purnama Rahman Hasibuan, Rahman Rahmi Rahmi Ramses Firdaus, Ramses Savitri, Yulia Wiryawan, Mahardika Yarsi Efendi, Yarsi