Spawning Potential Ratio (SPR) Approach as a Management Measure of Skipjack Sustainability Record from Cilacap Fishing Port, Central Java, Indonesia

Yonvitner Yonvitner; Mennofatria Boer; Rahmat Kurnia

doi:10.20473/jipk.v13i2.24926

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Vol. 13 No. 2 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN

Issue Published : September 28, 2021

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January 21, 2021

Accepted

July 1, 2021

Published

September 28, 2021

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Aquaculture Marine Science Fisheries Biotechnology

Spawning Potential Ratio (SPR) Approach as a Management Measure of Skipjack Sustainability Record from Cilacap Fishing Port, Central Java, Indonesia

https://doi.org/10.20473/jipk.v13i2.24926

Yonvitner Yonvitner

Aquatic Resource Management, Faculty of Fisheries and Marine Science, IPB University. Indonesia

Mennofatria Boer

Aquatic Resource Management, Faculty of Fisheries and Marine Science, IPB University. Indonesia

Rahmat Kurnia

Aquatic Resource Management, Faculty of Fisheries and Marine Science, IPB University. Indonesia

Corresponding Author(s) : Yonvitner Yonvitner

yonvitr@yahoo.com

Jurnal Ilmiah Perikanan dan Kelautan, Vol. 13 No. 2 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Article Published : September 28, 2021

Abstract

Highlight Research:

Spawning potential ratio (SPR) based on the length and frequency data is a substitution approach for data-poor management in fisheries
Gonad maturity is an indicator to ensure recruitment and stock sustainability. Therefore important to evaluate the impact of fishing capture on the size and length of fish
Spawning potential ratio of skipjack relatively low and potential medium impact on risk sustainability

Abstract

When data is limited, management measurement from fisheries makes it possible to use natural history data to analyze the potential spawning ratio (SPR). This research aimed to determine skipjack fish management measure from the Indian Ocean landed at Cilacap Fishing Port through the SPR approach. The study was conducted in December 2014 to March 2015 using length and reproduction data. The analysis consisted of the size structure, growth rate, and asymptotic length that were analyzed using FISAT II program and length at fifty percent maturity (Lm50). The SPR analysis used SPR software from the application in http://barefootecologist.com.au/lbspr. The size distributions of skipjack obtained were a length of 220-790 mm and an average dominant length of 311-371 mm. The asymptotic length obtained was 831.57 mm, with growth rate and natural mortality of 1.1 and 1.44 per year respectively. The population proportion of 50% reaching gonad maturity (Lm50) was found at a length of 494.75 mm and (Lm95 = 522.39 mm) with an M/k ratio of 1.309. The length selectivity level was caught 50% (SL50 = 317.36 mm) and 95% (SL95 = 373.1 mm). The spawning potential ratio (SPR) ranged from 2-4 with an average of 4% during observation. The SPR potential, which is lower from the standardized threshold of 40%, indicates many young fish populations are caught, and the potential for overfishing is high, high risk, and low sustainability.

Keywords

LengthSkipjackSpawning Potential RatioManagement MeasureSustainability

Yonvitner, Y., Boer, M., & Kurnia, R. (2021). Spawning Potential Ratio (SPR) Approach as a Management Measure of Skipjack Sustainability Record from Cilacap Fishing Port, Central Java, Indonesia. Jurnal Ilmiah Perikanan Dan Kelautan, 13(2), 199–207. https://doi.org/10.20473/jipk.v13i2.24926

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References

Angela, G. C., Mentang, F., & Sanger, G. (2015). Kajian mutu ikan cakalang (Katsuwonus pelamis, L.) asap dari tempat pengasapan desa girian atas yang dikemas vakum dan non vakum selama penyimpanan dingin. Media Teknologi Hasil Perikanan, 3(2).
Angraeni, A., Rezkyanti, N. I., Safruddin, S., & Zainuddin, M. (2014). Analisis Spasial dan Temporal Hasil Tangkapan Ikan Cakalang (Katsuwonus pelamis) dan thermal front pada musim peralihan di perairan Teluk Bone. Jurnal IPTEKS Pemanfaatan Sumberdaya Perikanan, 1(1).
Anggraeni, R., Solichin, A., & Saputra, S. W. (2015). Beberapa aspek biologi ikan cakalang (Katsuwonus pelamis) dalam kaitannya untuk pengelolaan perikanan di PPP Sadeng Kabupaten Gunungkidul Yogyakarta. Management of Aquatic Resources Journal, 4(3):230-239.
Anggraeni, R. I., Widagdo, S., & Rahyono, R. (2017, Juli). Hubungan upwelling dengan jumlah tangkapan ikan cakalang pada musim timur di Perairan Tamperan, Pacitan. Paper presented at the Seminar Nasional Kelautan XII: Inovasi Hasil Riset dan Teknologi dalam Rangka Penguatan Kemandirian Pengelolaan Sumber Daya Laut dan Pesisir, University of Hang Tuah, Indonesia.
Efendi, D. S., Adrianto, L., Wardiatno, Y., & Agustina, S. (2020). The performance of stock indicators of grouper (Serranidae) and snapper (Lutjanidae) fisheries in Saleh Bay, Indonesia. Aquaculture, Aquarium, Conservation & Legislation, 13(5):2431-2444.
Grande, M., Murua, H., Zudaire, I., & Korta, M. (2010). Spawning activity and batch fecundity of skipjack, Katsuwonus pelamis, in the Western Indian Ocean. Paper presented at Proceedings of the 10th Meeting of the Working Party on Tropical Tuna, Indian Ocean Tuna Commission, IOTC-2010-WPTT-47.
Grande, M., Murua, H., Zudaire, I., Goni, N., & Bodin, N. (2014). Reproductive timing and reproductive capacity of the Skipjack Tuna (Katsuwonus pelamis) in the western Indian Ocean. Fisheries Research, 156:14-22.
Hordyk, A. R., Loneragan, N. R., & Prince, J. D. (2015a). An evaluation of an iterative harvest strategy for data-poor fisheries using the length-based spawning potential ratio assessment methodology. Fisheries Research, 171:20-32.
Hordyk, A., Ono, K., Valencia, S., Loneragan, N., & Prince, J. (2015b). A novel length-based empirical estimation method of spawning potential ratio (SPR) and tests of its performance for small-scale, data-poor fisheries. ICES Journal of Marine Science, 72(1): 217-231.
Hommik, K., Fitzgerald, C. J., Kelly, F., & Shephard, S. (2020). Dome-shaped selectivity in LB-SPR: Length-Based assessment of data-limited inland fish stocks sampled with gillnets. Fisheries Research, 229:105574.
Jatmiko, I., Hartaty, H., & Bahtiar, A. (2015). Biologi reproduksi ikan cakalang (Katsuwonus pelamis) di Samudera Hindia bagian Timur. BAWAL Widya Riset Perikanan Tangkap, 7(2):87-94.
Kekenusa, J. S., Watung, V. N., & Hatidja, D. (2012). Analisis penentuan musim penangkapan ikan cakalang (Katsuwonus pelamis) di Perairan Manado Sulawesi Utara. Jurnal Ilmiah Sains, 12(2):112-119.
Kekenusa J. S. (2006). Pemodelan Hasil Tangkapan dan Evaluasi Model Produksi Surplus Ikan Cakalang yang tertangkap di Perairan sekitar Bitung Provinsi Sulawesi Utara. Doctoral dissertation. Surabaya: Universitas Airlangga).
Kibona, O. M., & Jónasson, J. P. (2019). Application of Length-Based Spawning Potential Ratio Method and Analysis of the Structure of the Electronic Catch Assessment Survey in Marine Waters of Mainland, Tanzania. Iceland: UNESCO GRí“-Fisheries Training Programme.
Kurniawan, W. (2015). Musim penangkapan ikan cakalang di perairan selatan Jawa Barat dan kaitannya dengan parameter oceanografi. Oceana, XL(4):53-60.
Lailossa, G. W. (2017). Model Cold Chain System Untuk Peningkatan Kualitas Ekspor Tuna, Tongkol, Cakalang (TTC). Doctoral dissertation. Surabaya: Institut Teknologi Sepuluh Nopember.
Leland, J. C., Bucher, D. J., & Coughran, J. (2015). Direct age determination of a subtropical freshwater crayfish (redclaw, Cherax quadricarinatus) using ossicular growth marks. PloS one, 10(8):e0134966.
Lowing, T. (2020). Analisis Manajemen Rantai Pasok Ikan Cakalang Di Tempat Pelelangan Ikan Tumumpa Kota Manado. Jurnal EMBA: Jurnal Riset Ekonomi, Manajemen, Bisnis dan Akuntansi, 8(1).
Mueni, E., Ndegwa, S., Magak, C., Omukoto, J., Okemwa, G., Imam, R., Wachira, K., Mwasi, L., Kapombe, L., Bandari, S., & Kimakwa, E. (2019). Species composition, abundance and preliminary spawning potential Ratio (SPR) assessment for tuna and tuna like species: Some results from application of mobile phone Catch Assessment Survey, Kenya. IOTC-2019-WPDCS15-23.
Mamarodia, A. A., Ngangi, C., & Manuhutu, E. A. (2019). Analisis Margin Pemasaran Abon Ikan Cakalang Ud. Trikora Manado. Doctoral dissertation. Manado: Universitas Katolik De La Salle.
Nurdin, E., & Panggabean, A. S. (2018). Musim penangkapan dan struktur ukuran cakalang (Katsuwonus pelamis Linnaeus, 1758) di sekitar rumpon di Perairan Palabuhanratu. Jurnal Penelitian Perikanan Indonesia, 23(4):299-308.
Nurdin, E., & Yusfiandayani, R. (2012). Struktur ukuran, hubungan panjang-bobot dan faktor kondisi ikan tuna di Perairan Prigi, Jawa Timur. BAWAL Widya Riset Perikanan Tangkap, 4(2):67-73.
Nurdin, E., & Nugraha, B. (2017). Penangkapan tuna dan cakalang dengan menggunakan alat tangkap pancing ulur (hand line) yang berbasis di pangkalan pendaratan ikan Pondokdadap Sendang Biru, Malang. Bawal Widya Riset Perikanan Tangkap, 2(1):27-33.
Orange, C. J. (1961). Spawning of yellowfin tuna and skipjack in the eastern tropical Pacific, as inferred from studies of gonad development. Inter-American Tropical Tuna Commission Bulletin, 5(6):457-526.
Pons, M., Kell, L., Rudd, M. B., Cope, J. M., & Lucena Frédou, F. (2019). Performance of length-based data-limited methods in a multi fleet context: application to small tunas, mackerels, and bonitos in the Atlantic Ocean. ICES Journal of Marine Science, 76(4):960-973.
Prince, J., Victor, S., Kloulchad, V., & Hordyk, A. (2015). Length based SPR assessment of eleven Indo-Pacific coral reef fish populations in Palau. Fisheries Research, 171:42-58.
Rochman, F., Nugraha, B., & Wujdi, A. (2015). Pendugaan parameter populasi ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Samudera Hindia Selatan Jawa. BAWAL Widya Riset Perikanan Tangkap, 7(2):77-85.
Restiangsih, Y. H., & Amri, K. (2019). Aspek biologi dan kebiasaan makanan ikan cakalang (Katsuwonus pelamis) di Laut Flores Dan Sekitarnya. BAWAL Widya Riset Perikanan Tangkap, 10(3):187-196.
Satria, F., & Sadiyah, L. (2017). Possible use of length-based spawning potential ratio for skipjack (Katsuwonus pelamis) in Indonesia's Archipelagic Waters. Indonesian Fisheries Research Journal, 23(1):45-53.
Satria, A. I. W., & Kurnia, R. (2017). Struktur Populasi Ikan Cakalang (Katsuwonus pelamis, Linnaeus 1758): Famili Scombridae: Perairan Pesisir Selatan Laut Jawa. Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management), 1(1):1-9.
Soares, J. B., Monteiro-Neto, C., da Costa, M. R., Martins, R. R. M., dos Santos Vieira, F. C., de Andrade-Tubino, M. F., & de Almeida Tubino, R. (2019). Size structure, reproduction, and growth of skipjack tuna (Katsuwonus pelamis) caught by the pole-and-line fleet in the southwest Atlantic. Fisheries Research, 212:136-145.
Stéquert, B., Rodriguez, J. N., Cuisset, B., & Le Menn, F. (2001). Gonadosomatic index and seasonal variations of plasma sex steroids in skipjack tuna (Katsuwonus pelamis) and yellowfin tuna (Thunnus albacares) from the western Indian Ocean. Aquatic Living Resources, 14(5):313-318.
Syukhriani, S., Nurani, T. W., & Haluan, J. (2018). Model Konseptual Pengembangan Perikanan Tongkol dan Cakalang yang Didaratkan di Kota Bengkulu. Jurnal Teknologi Perikanan dan Kelautan, 9(1):1-11.
Tangke, U., & Deni, S. (2013). Pemetaan daerah penangkapan ikan madidihang (Thunnus albacares) dan ikan cakalang (Katsuwonus pelamis) di Perairan Maluku Utara. Agrikan: Jurnal Agribisnis Perikanan, 6:1-17.
Winarso, B. (2005). Analisis Manajemen "Waktu” pada Usaha Penangkapan Ikan Tuna/Cakalang dengan Sistem Rumpon di Kawasan Timur Perairan Indonesia. Jurnal Ilmiah Binaniaga, 1(01):27-38.
Wujdi, A., Setyadji, B., & Nugroho, S. C. (2017). Identifikasi struktur stok ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Samudra Hindia (WPP NRI 573) menggunakan analisis bentuk otolith. Jurnal Penelitian Perikanan Indonesia, 23(2):77-88.
Yonvitner, Kurnia, R., & Boer, M. (2021a). Length Based-Spawning Potential Ratio (LB-SPR), on exploited demersal stock (Priachantus tayenus) in small scale fisheries, Sunda Strait. IOP Conference Series: Earth and Environmental Science, 744(1):012103.
Yonvitner, Boer, M., & Kurnia, R. (2021b). Length based data of Nemipterus japonicus to spawning potential ratio (SPR) estimation on small scale fisheries (SSF) management in Sunda Strait. IOP Conference Series: Earth and Environmental Science, 674(1):012002.
Zedta, R. R., Rintar, P. A., & Novianto, D. N. (2018). Estimasi parameter populasi ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Perairan Samudera Hindia. Bawal Widya Riset Perikanan Tangkap, 9(3):163-173.

References

Angela, G. C., Mentang, F., & Sanger, G. (2015). Kajian mutu ikan cakalang (Katsuwonus pelamis, L.) asap dari tempat pengasapan desa girian atas yang dikemas vakum dan non vakum selama penyimpanan dingin. Media Teknologi Hasil Perikanan, 3(2).

Angraeni, A., Rezkyanti, N. I., Safruddin, S., & Zainuddin, M. (2014). Analisis Spasial dan Temporal Hasil Tangkapan Ikan Cakalang (Katsuwonus pelamis) dan thermal front pada musim peralihan di perairan Teluk Bone. Jurnal IPTEKS Pemanfaatan Sumberdaya Perikanan, 1(1).

Anggraeni, R., Solichin, A., & Saputra, S. W. (2015). Beberapa aspek biologi ikan cakalang (Katsuwonus pelamis) dalam kaitannya untuk pengelolaan perikanan di PPP Sadeng Kabupaten Gunungkidul Yogyakarta. Management of Aquatic Resources Journal, 4(3):230-239.

Anggraeni, R. I., Widagdo, S., & Rahyono, R. (2017, Juli). Hubungan upwelling dengan jumlah tangkapan ikan cakalang pada musim timur di Perairan Tamperan, Pacitan. Paper presented at the Seminar Nasional Kelautan XII: Inovasi Hasil Riset dan Teknologi dalam Rangka Penguatan Kemandirian Pengelolaan Sumber Daya Laut dan Pesisir, University of Hang Tuah, Indonesia.

Efendi, D. S., Adrianto, L., Wardiatno, Y., & Agustina, S. (2020). The performance of stock indicators of grouper (Serranidae) and snapper (Lutjanidae) fisheries in Saleh Bay, Indonesia. Aquaculture, Aquarium, Conservation & Legislation, 13(5):2431-2444.

Grande, M., Murua, H., Zudaire, I., & Korta, M. (2010). Spawning activity and batch fecundity of skipjack, Katsuwonus pelamis, in the Western Indian Ocean. Paper presented at Proceedings of the 10th Meeting of the Working Party on Tropical Tuna, Indian Ocean Tuna Commission, IOTC-2010-WPTT-47.

Grande, M., Murua, H., Zudaire, I., Goni, N., & Bodin, N. (2014). Reproductive timing and reproductive capacity of the Skipjack Tuna (Katsuwonus pelamis) in the western Indian Ocean. Fisheries Research, 156:14-22.

Hordyk, A. R., Loneragan, N. R., & Prince, J. D. (2015a). An evaluation of an iterative harvest strategy for data-poor fisheries using the length-based spawning potential ratio assessment methodology. Fisheries Research, 171:20-32.

Hordyk, A., Ono, K., Valencia, S., Loneragan, N., & Prince, J. (2015b). A novel length-based empirical estimation method of spawning potential ratio (SPR) and tests of its performance for small-scale, data-poor fisheries. ICES Journal of Marine Science, 72(1): 217-231.

Hommik, K., Fitzgerald, C. J., Kelly, F., & Shephard, S. (2020). Dome-shaped selectivity in LB-SPR: Length-Based assessment of data-limited inland fish stocks sampled with gillnets. Fisheries Research, 229:105574.

Jatmiko, I., Hartaty, H., & Bahtiar, A. (2015). Biologi reproduksi ikan cakalang (Katsuwonus pelamis) di Samudera Hindia bagian Timur. BAWAL Widya Riset Perikanan Tangkap, 7(2):87-94.

Kekenusa, J. S., Watung, V. N., & Hatidja, D. (2012). Analisis penentuan musim penangkapan ikan cakalang (Katsuwonus pelamis) di Perairan Manado Sulawesi Utara. Jurnal Ilmiah Sains, 12(2):112-119.

Kekenusa J. S. (2006). Pemodelan Hasil Tangkapan dan Evaluasi Model Produksi Surplus Ikan Cakalang yang tertangkap di Perairan sekitar Bitung Provinsi Sulawesi Utara. Doctoral dissertation. Surabaya: Universitas Airlangga).

Kibona, O. M., & Jónasson, J. P. (2019). Application of Length-Based Spawning Potential Ratio Method and Analysis of the Structure of the Electronic Catch Assessment Survey in Marine Waters of Mainland, Tanzania. Iceland: UNESCO GRí“-Fisheries Training Programme.

Kurniawan, W. (2015). Musim penangkapan ikan cakalang di perairan selatan Jawa Barat dan kaitannya dengan parameter oceanografi. Oceana, XL(4):53-60.

Lailossa, G. W. (2017). Model Cold Chain System Untuk Peningkatan Kualitas Ekspor Tuna, Tongkol, Cakalang (TTC). Doctoral dissertation. Surabaya: Institut Teknologi Sepuluh Nopember.

Leland, J. C., Bucher, D. J., & Coughran, J. (2015). Direct age determination of a subtropical freshwater crayfish (redclaw, Cherax quadricarinatus) using ossicular growth marks. PloS one, 10(8):e0134966.

Lowing, T. (2020). Analisis Manajemen Rantai Pasok Ikan Cakalang Di Tempat Pelelangan Ikan Tumumpa Kota Manado. Jurnal EMBA: Jurnal Riset Ekonomi, Manajemen, Bisnis dan Akuntansi, 8(1).

Mueni, E., Ndegwa, S., Magak, C., Omukoto, J., Okemwa, G., Imam, R., Wachira, K., Mwasi, L., Kapombe, L., Bandari, S., & Kimakwa, E. (2019). Species composition, abundance and preliminary spawning potential Ratio (SPR) assessment for tuna and tuna like species: Some results from application of mobile phone Catch Assessment Survey, Kenya. IOTC-2019-WPDCS15-23.

Mamarodia, A. A., Ngangi, C., & Manuhutu, E. A. (2019). Analisis Margin Pemasaran Abon Ikan Cakalang Ud. Trikora Manado. Doctoral dissertation. Manado: Universitas Katolik De La Salle.

Nurdin, E., & Panggabean, A. S. (2018). Musim penangkapan dan struktur ukuran cakalang (Katsuwonus pelamis Linnaeus, 1758) di sekitar rumpon di Perairan Palabuhanratu. Jurnal Penelitian Perikanan Indonesia, 23(4):299-308.

Nurdin, E., & Yusfiandayani, R. (2012). Struktur ukuran, hubungan panjang-bobot dan faktor kondisi ikan tuna di Perairan Prigi, Jawa Timur. BAWAL Widya Riset Perikanan Tangkap, 4(2):67-73.

Nurdin, E., & Nugraha, B. (2017). Penangkapan tuna dan cakalang dengan menggunakan alat tangkap pancing ulur (hand line) yang berbasis di pangkalan pendaratan ikan Pondokdadap Sendang Biru, Malang. Bawal Widya Riset Perikanan Tangkap, 2(1):27-33.

Orange, C. J. (1961). Spawning of yellowfin tuna and skipjack in the eastern tropical Pacific, as inferred from studies of gonad development. Inter-American Tropical Tuna Commission Bulletin, 5(6):457-526.

Pons, M., Kell, L., Rudd, M. B., Cope, J. M., & Lucena Frédou, F. (2019). Performance of length-based data-limited methods in a multi fleet context: application to small tunas, mackerels, and bonitos in the Atlantic Ocean. ICES Journal of Marine Science, 76(4):960-973.

Prince, J., Victor, S., Kloulchad, V., & Hordyk, A. (2015). Length based SPR assessment of eleven Indo-Pacific coral reef fish populations in Palau. Fisheries Research, 171:42-58.

Rochman, F., Nugraha, B., & Wujdi, A. (2015). Pendugaan parameter populasi ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Samudera Hindia Selatan Jawa. BAWAL Widya Riset Perikanan Tangkap, 7(2):77-85.

Restiangsih, Y. H., & Amri, K. (2019). Aspek biologi dan kebiasaan makanan ikan cakalang (Katsuwonus pelamis) di Laut Flores Dan Sekitarnya. BAWAL Widya Riset Perikanan Tangkap, 10(3):187-196.

Satria, F., & Sadiyah, L. (2017). Possible use of length-based spawning potential ratio for skipjack (Katsuwonus pelamis) in Indonesia's Archipelagic Waters. Indonesian Fisheries Research Journal, 23(1):45-53.

Satria, A. I. W., & Kurnia, R. (2017). Struktur Populasi Ikan Cakalang (Katsuwonus pelamis, Linnaeus 1758): Famili Scombridae: Perairan Pesisir Selatan Laut Jawa. Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management), 1(1):1-9.

Soares, J. B., Monteiro-Neto, C., da Costa, M. R., Martins, R. R. M., dos Santos Vieira, F. C., de Andrade-Tubino, M. F., & de Almeida Tubino, R. (2019). Size structure, reproduction, and growth of skipjack tuna (Katsuwonus pelamis) caught by the pole-and-line fleet in the southwest Atlantic. Fisheries Research, 212:136-145.

Stéquert, B., Rodriguez, J. N., Cuisset, B., & Le Menn, F. (2001). Gonadosomatic index and seasonal variations of plasma sex steroids in skipjack tuna (Katsuwonus pelamis) and yellowfin tuna (Thunnus albacares) from the western Indian Ocean. Aquatic Living Resources, 14(5):313-318.

Syukhriani, S., Nurani, T. W., & Haluan, J. (2018). Model Konseptual Pengembangan Perikanan Tongkol dan Cakalang yang Didaratkan di Kota Bengkulu. Jurnal Teknologi Perikanan dan Kelautan, 9(1):1-11.

Tangke, U., & Deni, S. (2013). Pemetaan daerah penangkapan ikan madidihang (Thunnus albacares) dan ikan cakalang (Katsuwonus pelamis) di Perairan Maluku Utara. Agrikan: Jurnal Agribisnis Perikanan, 6:1-17.

Winarso, B. (2005). Analisis Manajemen "Waktu” pada Usaha Penangkapan Ikan Tuna/Cakalang dengan Sistem Rumpon di Kawasan Timur Perairan Indonesia. Jurnal Ilmiah Binaniaga, 1(01):27-38.

Wujdi, A., Setyadji, B., & Nugroho, S. C. (2017). Identifikasi struktur stok ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Samudra Hindia (WPP NRI 573) menggunakan analisis bentuk otolith. Jurnal Penelitian Perikanan Indonesia, 23(2):77-88.

Yonvitner, Kurnia, R., & Boer, M. (2021a). Length Based-Spawning Potential Ratio (LB-SPR), on exploited demersal stock (Priachantus tayenus) in small scale fisheries, Sunda Strait. IOP Conference Series: Earth and Environmental Science, 744(1):012103.

Yonvitner, Boer, M., & Kurnia, R. (2021b). Length based data of Nemipterus japonicus to spawning potential ratio (SPR) estimation on small scale fisheries (SSF) management in Sunda Strait. IOP Conference Series: Earth and Environmental Science, 674(1):012002.

Zedta, R. R., Rintar, P. A., & Novianto, D. N. (2018). Estimasi parameter populasi ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Perairan Samudera Hindia. Bawal Widya Riset Perikanan Tangkap, 9(3):163-173.

Author biographies is not available.