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Modelling Migratory Pinch Points and Connectivity of Pygmy Blue Whale Using Circuit Theory: A Case Study of Savu Sea, Indonesia

ILMU KELAUTAN: Indonesian Journal of Marine Sciences · Vol. 30 No. 2 (2025) · hlm. 174–182

DOI
10.14710/ik.ijms.30.2.174-182
ISSN
2406-7598, 0853-7291
Terbit
2025-06-15
Penerbit
Marine Science Department Diponegoro University
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-sa/4.0

Abstrak

Blue whale and their subspecies is an endangered whale species that needs to be conserved by protecting their important habitat and migration corridor. Research about designing and modelling blue whale habitat for marine protected area has been done many times. However, incorporation of connectivity in marine protected areas design and management has been limited due to the complexity of methods used to model connectivity, therefore the implementation among practitioners is inconsistent. An alternative method to model connectivity of pygmy blue whale habitat is discussed through a combination of maximum entropy model and circuit theory. The habitat suitability models were made using satellite-tagged pygmy blue whale data (2012-2016) and oceanographic variables, such as sea surface temperature, chlorophyll, salinity, bathymetry, and seafloor geomorphology for four season that is March-April-May (MAM), June-July-August (JJA), September-October-November (SON), and December-January-February (DJF). The habitat suitability model shows different importance of environmental variables in their preference of habitat in each season, with distance from slope as the most influential parameter during the migration season (54.4% for MAM, 37.8% for SON), mean climatological chlorophyll during winter (31%), and mean climatological sea surface temperature during summer (54.7%). Habitat suitability result were then used to model connectivity, assuming that the whales migrate during MAM and SON. The migration model from Omniscape showed some pinch point, such as Sumba-Sape strait, Alor strait, Rote strait, Ombai strait. These pinch points can be seen as corridors with high potential of pygmy blue whale migration or high connectivity, therefore this area could become priority for conservation.

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  • Diponegoro University
  • Cenderawasih University
  • Bandung Institute of Technology
  • Australian Antarctic Division
  • Navamindradhiraj University
  • Afiliasi tidak diketahui
  • Organisasi berbeda
  • Organisasi sama
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Rekan penulisOrganisasiArtikel bersama
Anindya WirasatriyaDiponegoro University8
Hermin Pancasakti KusumaningrumDiponegoro University7
Hadi EndrawatiDiponegoro University4
Diah Permata WijayantiDiponegoro University4
Retno HartatiDiponegoro University4
Ambariyanto AmbariyantoDiponegoro University4
Lilik MaslukahDiponegoro University4
Widianingsih WidianingsihDiponegoro University3
Denny Nugroho SugiantoDiponegoro University3
Agus IndarjoDiponegoro University2
Galung Dhiva MaharaniDiponegoro University2
Chrisna Adhi SuryonoDiponegoro University2
Sri RedjekiDiponegoro University2
Ita WidowatiDiponegoro University2
Nining Sari NingsihBandung Institute of Technology2
Safwan HadiBandung Institute of Technology2
Indra Budi PrasetyawanDiponegoro University2
Parichat WetchayontNavamindradhiraj University2
Dwi Haryo IsmunartiDiponegoro University2
Azis RifaiDiponegoro University2
Subagiyo SubagiyoDiponegoro University2
Lolita Lolita TuhumenaAfiliasi tidak diketahui1
Imam MishbachCenderawasih University1
Lalu Panji Imam AgamawanCenderawasih University1
Baigo HamunaCenderawasih University1
Liyatin GeaCenderawasih University1
Anis Yasmin SabilaDiponegoro University1
Sugeng WidadaDiponegoro University1
S. SuryonoDiponegoro University1
Suryono SuryonoDiponegoro University1
Dwi HaryantiDiponegoro University1
Mila Amelia Nur AzizahDiponegoro University1
Ranjeet BhagooliDiponegoro University1
Agus SupangatAfiliasi tidak diketahui1

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Sumber metadata: OAI-PMH (metadata jurnal) http://ejournal.undip.ac.id/index.php/ijms/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Modelling Migratory Pinch Points and Connectivity of Pygmy Blue Whale Using Circuit Theory: A Case Study of Savu Sea, Indonesia</dc:title>
	<dc:creator>Jihadi, Muhammad Shulhan</dc:creator>
	<dc:creator>Zainuri, Muhammad</dc:creator>
	<dc:creator>Goff, Virginia Andrews-</dc:creator>
	<dc:creator>Widiaratih, Rikha</dc:creator>
	<dc:creator>Kunarso, Kunarso</dc:creator>
	<dc:creator>Indrayanti, Elis</dc:creator>
	<dc:subject xml:lang="en-US">pygmy blue whale; migration; connectivity; circuit theory; Australia-Indonesia</dc:subject>
	<dc:description xml:lang="en-US">Blue whale and their subspecies is an endangered whale species that needs to be conserved by protecting their important habitat and migration corridor. Research about designing and modelling blue whale habitat for marine protected area has been done many times. However, incorporation of connectivity in marine protected areas design and management has been limited due to the complexity of methods used to model connectivity, therefore the implementation among practitioners is inconsistent. An alternative method to model connectivity of pygmy blue whale habitat is discussed through a combination of maximum entropy model and circuit theory. The habitat suitability models were made using satellite-tagged pygmy blue whale data (2012-2016) and oceanographic variables, such as sea surface temperature, chlorophyll, salinity, bathymetry, and seafloor geomorphology for four season that is March-April-May (MAM), June-July-August (JJA), September-October-November (SON), and December-January-February (DJF). The habitat suitability model shows different importance of environmental variables in their preference of habitat in each season, with distance from slope as the most influential parameter during the migration season (54.4% for MAM, 37.8% for SON), mean climatological chlorophyll during winter (31%), and mean climatological sea surface temperature during summer (54.7%). Habitat suitability result were then used to model connectivity, assuming that the whales migrate during MAM and SON. The migration model from Omniscape showed some pinch point, such as Sumba-Sape strait, Alor strait, Rote strait, Ombai strait. These pinch points can be seen as corridors with high potential of pygmy blue whale migration or high connectivity, therefore this area could become priority for conservation.</dc:description>
	<dc:publisher xml:lang="en-US">Marine Science Department Diponegoro University</dc:publisher>
	<dc:date>2025-06-15</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
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	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://ejournal.undip.ac.id/index.php/ijms/article/view/66979</dc:identifier>
	<dc:identifier>10.14710/ik.ijms.30.2.174-182</dc:identifier>
	<dc:source xml:lang="en-US">ILMU KELAUTAN: Indonesian Journal of Marine Sciences; Vol 30, No 2 (2025): Ilmu Kelautan; 174-182</dc:source>
	<dc:source>2406-7598</dc:source>
	<dc:source>0853-7291</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://ejournal.undip.ac.id/index.php/ijms/article/view/66979/pdf</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2025 ILMU KELAUTAN: Indonesian Journal of Marine Sciences</dc:rights>
	<dc:rights xml:lang="en-US">https://creativecommons.org/licenses/by-sa/4.0</dc:rights>
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