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LENGTH DISTRIBUTION AND SEX RATIO TO INVESTIGATE SPAWN ELIGIBILITY OF BIGEYE TUNA(THUNNUS OBESUS LOWE, 1839) IN THE INDIAN OCEAN | Wujdi | Widyariset

LENGTH DISTRIBUTION AND SEX RATIO TO INVESTIGATE SPAWN ELIGIBILITY OF BIGEYE TUNA(THUNNUS OBESUS LOWE, 1839) IN THE INDIAN OCEAN

Arief Wujdi, Fathur Rochman, Irwan Jatmiko

Abstract


Bigeye tuna (Thunnus obesus Lowe, 1839) is the important commodity for the fishing industry in Indonesia. Increased exploitation is threatening their population, so that is necessary to monitor the size composition that meets the eligibility to be captured, as well as the sex ratio as a management measure. Data was collected by scientific observers program which was following commercial tuna longline operation mainly based in Benoa, Palabuhanratu and Bungus Fishing Port from August 2005 to December 2014. Chi-Square analysis with 95% of confidence level also implemented to determine the sex ratio of female and male. The result showed that BET caught ranged from 30 to 192 cm, mode size ranged from 121 to 125 cm and mean 111,76 cm. As much as 69,5% of them was greater than a length at first maturity (Lm) and that means have been worthy to be captured. The sex ratio of (F:M) 1:1,32 was observed which indicates male was  dominant  than  female.  Correlation  between  sex  ratio  and  length proved to be significant where the female was increasing in size between 95-145 cm, as described a regression equation. However, an equal sex ratio occurred during December to January and also from April to June along the southern part of Java and East Nusa Tenggara and western part of Australia waters.




Keywords


Sex ratio; Length distribution; Bigeye tuna; Indian ocean

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References


Anrose, A, and A B Kar. 2010. “Some Aspect of the Bigeye Tuna ( Thunnus Obesus, Lowe 1839) in Andaman and Nicobar Waters.” The 12th Session IOTC Working Party on Tropical Tunas. Victoria, Seychelles 18-25 October 2010. http://www.iotc.org/sites/default/files/documents/proceedings/2010/wptt/IOTC-2010-WPTT-41.pdf.

Ariz, J., A.D. de Molina, M.L. Ramos, and J C Santana. 2006. “Bigeye Tuna and Yellowfin Tuna Sex-Ratio Analysis from Observer Data Obtained during the Experimental Cruise on Spanish Longliners in the Southwestern Indian Ocean in 2005.” The 8th Session IOTC Working Party on Tropical Tunas. Victoria, Seychelles 24-28 July 2006. http://www.iotc.org/sites/default/files/documents/proceedings/2006/wptt/IOTC-2006-WPTT-05.pdf.

Bahtiar, A., A. Barata, and D. Novianto. 2013. “Sebaran Laju Pancing Rawai Tuna Di Samudera Hindia.” Jurnal Penelitian Perikanan Indonesia 9(4): 195–202.

Bal, D. V., and K. V. Rao. 1984. Marine Fisheries. New Delhi: Tata Mc. Graw–Hill Publishing Company Limited.

Barata, A., D. Novianto, and A. Bahtiar. 2011. “Sebaran Ikan Tuna Berdasarkan Suhu Dan Kedalaman Di Samudera Hindia.” Ilmu Kelautan 16(3) (September): 165–70.

Collette, Bruce B., and Cornelia E. Nauen. 1983. FAO Species Catalogue Vol . 2 Scombrids of the World: An Annotated and Illustrated Catalogue of Tunas, Mackerels, Bonitos and Related Species Know to Date. FAO Fisheries Synopsis No.125. Vol. 2. Rome: FAO.

DJPT. 2012. Statistik Perikanan Tangkap Indonesia, 2011. Jakarta: Direktorat Jenderal Perikanan Tangkap.

Effendie, Moch. Ichsan. 2002. Biologi Perikanan. Yogyakarta: Yayasan Pustaka Nusatama.

FAO. 1994. World Review of Highly Migratory Species and Straddling Stocks. FAO Fisheries Technical Paper No. 337. Rome: FAO Fisheries Department.

Farley, J., N. Clear, B. Leroy, T. Davis, and G. Mc Pherson. 2003. “Age and Growth of Bigeye Tuna (Thunnus Obesus) from the Eastern and Western Australian Fishing Zone.” CSIRO Marine Research.

Farley, J.H., J. P. Eveson, T.L.O. Davis, R. Andamari, C.H. Proctor, B. Nugraha, and C.R. Davies. 2014. “Demographic Structure, Sex Ratio and Growth Rates of Southern Bluefin Tuna (Thunnus Maccoyii) on the Spawning Ground.” PLoS ONE 9(5). doi:10.1371/journal.pone.0096392.

Fonteneau, Alain, J Ariz, A Delgado, P Pallares, and R Pianet. 2005. “A Comparison of Bigeye (Thunnus Obesus) Stocks and Fisheries in the Atlantic , Indian and Pacific Oceans.” Col. Vol. Sci. Pap. ICCAT 57(2): 41–66.

Hamano, Tatsuo, and Shuhei Matsuura. 1987. “Sex Ratio of the Japanese Mantis Shrimp in Hakata Bay.” Nippon Suisan Gakkaishi 53(12): 22–79.

Hedianto, Dimas A., and Sri E. Purnamaningtyas. 2013. “Biologi Reproduksi Ikan Golsom (Hemichromis Elongatus, Guichenot 1861) Di Waduk Cirata, Jawa Barat.” BAWAL Widyariset Perikanan Tangkap 5(3) (Desember): 159–66.

IOTC. 2013. “Report of the Sixteenth Session of the IOTC Scientific Committee.” http://iotc.org/sites/default/files/documents/2014/01/IOTC-2013-SC16-RE.pdf.

IUCN. 2013. “The IUCN Red List of Threatened Species. Version 2013.2.” http://www.iucnredlist.org.

Jatmiko, I., B. Setyadji, and D. Novianto. 2014. “Distribusi Spasial Dan Temporal Ikan Tuna Mata Besar (Thunnus Obesus) Di Samudera Hindia Bagian Timur.” Jurnal Penelitian Perikanan Indonesia 20(3) (September): 137–42.

Lambert, Y., N. A. Yaragina, G. Kraus, G. Marteinsdottir, and P. J. Wright. 2003. “Using Environmental and Biological Indices as Proxies for Egg and Larval Production of Marine Fish.” Journal of Northwest Atlantic Fishery Science, 115–59.

Matsuura, H., T. Sugimoto, M. Nakai, and S. Tsuji. 1997. “Oceanographic Conditions Near The Spawning Ground of Southern Bluefin Tuna; Northeastern Indian Ocean.” Journal of Oceanography 53: 421–33.

Nasution, Syahroma H. 2004. “Distribusi Dan Perkembangan Gonad Ikan Endemik Rainbow Selebensis (Telmatherina Celebensis) Di Danau Towuti, Sulawesi Selatan.” Institut Pertanian Bogor.

Nishikawa, Y., M. Honma, S. Ueyanagi, and S. Kikawa. 1985. “Average Distribution of Larvae of Oceanic Species of Scombroid Fishes, 1956–1981.” S Ser.Far Seas Fish.Res.Lab. (12): 99p.

Nootmorn, Praulai. 2004. “Reproductive Biology of Bigeye Tuna in the Eastern Indian Ocean.” IOTC Proceeding No. 7 7(7): 1–5. http://iotc.org/sites/default/files/documents/proceedings/2004/wptt/IOTC-2004-WPTT-05.pdf.

Schaefer, Kurt M. 2001. “Reproductive Biology of Tunas.” In Tuna: Physiology, Ecology, and Evolution, edited by B. A. Block, E. D. Stevens, W. S. Hoar, D. J. Randall, and A. P. Farrel, 225–70. San Diego, California, USA.: Academic Press.

Setyadji, B., A. Bahtiar, and B. Nugraha. 2012. “Analysis of Sex Ratio by Length Class of Bigeye Tuna (Thunnus Obesus) in the Indian Ocean.” Widyariset 15(3) (Desember): 593–98.

Ueyanagi, S. 1969. “Observations on the Distribution of Tuna Larvae in the Indo-Pacific Ocean with Emphasis on the Delineation of the Spawning Areas of Albacore, Thunnus Alalunga.” Bull.Far Seas Fish.Res.Lab. 2: 177–256.

Wahyuono, H., S. Budihardjo, Wudianto, and R. Rustam. 1983. “Pengamatan Parameter Biologi Beberapa Jenis Ikan Demersal Di Perairan Selat Malaka, Sumatera Utara.” Laporan Penelitian Perikanan Laut 26: 29–48.

Wang, S. B., F. C. Chang, S. H. Wang, and C. L. Kuo. 2002. “Distributed in Surrounding Waters of Taiwan.” The 15th Meeting of the Standing Committee on Tuna and Billfish (SCTB). Hawaii, July 22-27 2002, no. July: 13. http://www.soest.hawaii.edu/PFRP/sctb15/papers/RG-1.pdf.

Xu, L., G. Zhu, L. Song, and W. Jiang. 2006. “Preliminary Analysis on Biological Characteristic of Bigeye Tuna, Thunnus Obesus, Based on Observer’s Data Available from the 2004-2005 Survey in the Western Central Atlantic Ocean.” Col. Vol. Sci. Pap. ICCAT 59(2): 555–63.

Zhu, G. P., X. J. Dai, L. M. Song, and L. X Xu. 2011. “Size at Sexual Maturity of Bigeye Tuna Thunnus Obesus (Perciformes: Scombridae) in the Tropical Waters: A Comparative Analysis.” Turkish Journal of Fisheries and Aquatic Sciences 11: 149–56. doi:10.4194/trjfas.2011.0119.

Zhu, G., L. Xu, Y. Zhou, and X. Chen. 2009. “Growth and Mortality Rates of Bigeye Tuna Thunnus Obesus (Perciformes: Scombridae) in the Central Atlantic Ocean.” Revista de Biología Tropical 57(1-2) (March-June): 79–88. http://www.ncbi.nlm.nih.gov/pubmed/19637690.




DOI: http://dx.doi.org/10.14203/widyariset.2.1.2016.67-76

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