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REGRESSION MODEL ANALYSIS FOR DETERMINATION OF Amyda Cartilaginea MAXIMUM BREEDING AGE

Indonesian Journal of Forestry Research · Vol. 13 No. 2 (2026) · hlm. 325–338

DOI
10.59465/ijfr.2026.13.2.325-338
ISSN
2406-8195, 2355-7079
Terbit
2026-10-25
Penerbit
Association of Indonesian Forestry and Environment Researchers and Technicians
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-nc-sa/4.0

Abstrak

Harvest quota of Asiatic softshell turtle (Amyda cartilaginea) in Indonesia is the largest in the world. This has an impact on the decline in wildlife populations, given the lack of ex-situ conservation efforts and the fact that exporters prefer to take from nature. Information on the reproductive biology of the turtles is very important as a basis for conservation by estimating the speed of reproduction in order to maintain their population in nature. The purpose of this study was to determine the relationship between body weight and number of eggs on morphometric variations of the Asiatic softshell turtle (A. cartilaginea) as the basis for determining the maximum reproductive age. The method used is observational by measuring morphometric with Curved Carapace Length (CCL), Curved Carapace Width (CCW), Plastron Lenght (PL) and Plastron Width (PW) techniques. The results showed that the weight of the female ranged from 3 to 7.3 kg, CCL 20-48.4 cm, CCW 17.3-31.6 cm, PL 19.6-35.8 cm, and PW 17-34.5 cm. Weight (Y) is positively correlated with CCL (X) with the equation Y = 4.031X + 4.1885. The number of eggs (Y) can be estimated from Body Weight (X) with the allometric formula Y = 0.0117 X + 2.9424. These results indicate that the strongest correlation to the number of eggs is CCL. The age structure that produces the most eggs with good quality is from the adult age structure (CCL 35-40 cm) so that it can be recommended as a superior female for captivity.

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Rekan penulisOrganisasiArtikel bersama
Raden GarsetiasihNational Research and Innovation Agency3
Lilik Budi PrasetyoIPB University2
Abdul Haris MustariIPB University2
Endang KarlinaNational Research and Innovation Agency2
Reny SawitriNational Research and Innovation Agency2
Ane Dwi SeptinaNational Research and Innovation Agency2
Mohamad IqbalNational Research and Innovation Agency2
Atika Zahra RahmayantiNational Research and Innovation Agency2
Ahmad MunawirAfiliasi tidak diketahui1
Wardi SeptianaAfiliasi tidak diketahui1
Pairah PairahAfiliasi tidak diketahui1
Moch. Erlan SodahlanAfiliasi tidak diketahui1
Yosi IrawanAfiliasi tidak diketahui1
Dede Aulia RahmanIPB University1
TaqiuddinAfiliasi tidak diketahui1
. PairahAfiliasi tidak diketahui1
Ragil IriantoAfiliasi tidak diketahui1

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Sumber metadata: OAI-PMH (metadata jurnal) https://ejournal.aptklhi.org/index.php/ijfr/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">REGRESSION MODEL ANALYSIS FOR DETERMINATION OF Amyda Cartilaginea MAXIMUM BREEDING AGE </dc:title>
	<dc:creator>Sihombing, Vivin Silvaliandra</dc:creator>
	<dc:creator>Kwatrina, Rozza Tri</dc:creator>
	<dc:creator>Santosa, Yanto</dc:creator>
	<dc:creator>Rianti, Anita</dc:creator>
	<dc:subject xml:lang="en-US">Asiatic softshell turtle</dc:subject>
	<dc:subject xml:lang="en-US">captive</dc:subject>
	<dc:subject xml:lang="en-US">maximum breeding age</dc:subject>
	<dc:subject xml:lang="en-US">model</dc:subject>
	<dc:subject xml:lang="en-US">regression</dc:subject>
	<dc:description xml:lang="en-US">Harvest quota of Asiatic softshell turtle (Amyda cartilaginea) in Indonesia is the largest in the world. This has an impact on the decline in wildlife populations, given the lack of ex-situ conservation efforts and the fact that exporters prefer to take from nature. Information on the reproductive biology of the turtles is very important as a basis for conservation by estimating the speed of reproduction in order to maintain their population in nature. The purpose of this study was to determine the relationship between body weight and number of eggs on morphometric variations of the Asiatic softshell turtle (A. cartilaginea) as the basis for determining the maximum reproductive age. The method used is observational by measuring morphometric with Curved Carapace Length (CCL), Curved Carapace Width (CCW), Plastron Lenght (PL) and Plastron Width (PW) techniques. The results showed that the weight of the female ranged from 3 to 7.3 kg, CCL 20-48.4 cm,  CCW 17.3-31.6 cm, PL 19.6-35.8 cm, and PW 17-34.5 cm. Weight (Y) is positively correlated with CCL (X) with the equation Y = 4.031X + 4.1885. The number of eggs (Y) can be estimated from Body Weight (X) with the allometric formula Y = 0.0117 X + 2.9424. These results indicate that the strongest correlation to the number of eggs is CCL. The age structure that produces the most eggs with good quality is from the adult age structure (CCL 35-40 cm) so that it can be recommended as a superior female for captivity.</dc:description>
	<dc:publisher xml:lang="en-US">Association of Indonesian Forestry and Environment Researchers and Technicians</dc:publisher>
	<dc:date>2026-10-25</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://ejournal.aptklhi.org/index.php/ijfr/article/view/779</dc:identifier>
	<dc:identifier>10.59465/ijfr.2026.13.2.325-338</dc:identifier>
	<dc:source xml:lang="en-US">Indonesian Journal of Forestry Research; Vol. 13 No. 2 (2026): Indonesian Journal of Forestry Research; 325-338</dc:source>
	<dc:source>2406-8195</dc:source>
	<dc:source>2355-7079</dc:source>
	<dc:source>10.59465/ijfr.2026.13.2</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://ejournal.aptklhi.org/index.php/ijfr/article/view/779/499</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2026 Indonesian Journal of Forestry Research</dc:rights>
	<dc:rights xml:lang="en-US">https://creativecommons.org/licenses/by-nc-sa/4.0</dc:rights>
</oai_dc:dc>