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All Journal Fauna: Jurnal Kajian Ilmu Hewani
C. Karel Pattinasaranny
Universitas Pattimura
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Impact of Seasonal Changes on the Timing and Migration Patterns of the Common Tern (Sterna hirundo) in Indonesian Waters Yosevita Theodora Latupapua; Fanny Soselisa; C. Karel Pattinasaranny
Fauna: Jurnal Kajian Ilmu Hewani Vol. 3 No. 1 (2025): Juni : Fauna: Jurnal Kajian Ilmu Hewani
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/fauna.v3i1.500

Abstract

Seasonal and oceanographic variability can influence the movement ecology of migratory seabirds by altering environmental conditions along their migration routes. This study aimed to evaluate the effects of seasonal and oceanographic variability on the timing and spatial patterns of Common Tern (Sterna hirundo) migration in Indonesian waters. A quantitative observational approach was applied using satellite tracking to characterize migration timing, duration, movement speed, and spatial routes across different monsoon periods. Migration records were integrated with sea surface temperature, wind speed and direction, and seasonal conditions, followed by temporal, spatial, correlation, and regression analyses. The results showed that migration during the southeast monsoon was characterized by shorter duration, higher movement speed, and more direct routes, whereas the northwest monsoon was associated with longer duration, lower movement speed, and more dispersed trajectories. Sea surface temperature was associated with migration timing, while wind conditions were related to movement performance. The findings indicate that migration patterns reflect interactions between seasonal marine conditions and behavioral flexibility. Long-term integration of satellite tracking and oceanographic monitoring is therefore important for identifying environmentally sensitive migration periods and supporting adaptive conservation of migratory seabirds in Indonesian waters
The Effect of Light Intensity on Nocturnal Activity Patterns and Hunting Performance of Fruit Bats (Pteropus spp.) in Agroforestry Environments Yosevita Theodora Latupapua; Maya. M. S. Puttileihalat; C. Karel Pattinasaranny
Fauna: Jurnal Kajian Ilmu Hewani Vol. 3 No. 2 (2025): Desember: Fauna : Jurnal Kajian Ilmu Hewani
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/fauna.v3i2.502

Abstract

Artificial light at night is an environmental disturbance that can alter natural conditions and influence the behavior of nocturnal wildlife, including fruit bats. This study aimed to examine the relationship between light intensity, nocturnal activity patterns, and hunting or foraging performance of fruit bats (Pteropus spp.) in an agroforestry environment. A quantitative correlational approach was applied by measuring nighttime light intensity using a digital lux meter at several observation points representing different illumination conditions. Nocturnal activity and hunting or foraging behavior were systematically observed during nighttime periods, and the relationships among the observed variables were evaluated using correlation analysis. The results showed that increasing light intensity was associated with decreasing nocturnal activity and hunting or foraging frequency. Fruit bats were more active in darker areas, while locations with greater illumination showed lower levels of movement and food-searching activity. These findings indicate that nighttime illumination is an important environmental factor associated with the behavioral patterns of fruit bats in agroforestry landscapes. Maintaining dark habitat patches, vegetation cover, and appropriate nighttime lighting management may therefore contribute to the conservation of fruit bats and support their ecological functions within managed tropical landscapes.
Co-Authors Fanny Soselisa Maya. M. S. Puttileihalat Yosevita Theodora Latupapua