Modelling several morphometric relationships of swordfish (Xiphias gladius), black marlin (Makaira indica) and blue marlin (Makaira nigricans) caught from Indonesian longliners in the eastern Indian Ocean

Bram  Setyadji; Irwan  Jatmiko; Arief  Wujdi

doi:10.17017/j.fish.116

Bram Setyadji Research Institute for Tuna Fisheries, Jl. Mertasari No. 140, Sidakarya, Denpasar, Bali - 80224, Indonesia
Irwan Jatmiko Research Institute for Tuna Fisheries, Jl. Mertasari No. 140, Sidakarya, Denpasar, Bali - 80224, Indonesia
Arief Wujdi Research Institute for Tuna Fisheries, Jl. Mertasari No. 140, Sidakarya, Denpasar, Bali - 80224, Indonesia

DOI: https://doi.org/10.17017/j.fish.116

Keywords: Billfish, morphometric relationship, eastern Indian Ocean

Abstract

This paper presents several equations for converting among measures of size (length and weight) for swordfish (Xiphias gladius), black marlin (Makaira indica) and blue marlin (Makaira nigricans) caught by Indonesian longliners in the Indian Ocean. The equations use for transforming non-standard measurement i.e. eye fork length (EFL) and pectoral fork length (PFL) to standard measurement, lower jaw fork length (LJFL). The paper also discussed about the length-weight relationship, including converting from non-standard length (EFL and PFL) to round weight. The result showed that both PFL and EFL were positively related to LJFL but there were no significant differences existed between females and males among length measures for swordfish, blue marlin, and black marlin (ANCOVA, P>0.05). All regression equation models were considered to be valid (P<0.01) with coefficient of determinations (r²) ranged from 0.81-0.99. Allometric growth pattern was statistically observed for all swordfish (b=2.94, r²=0.94), black marlin (b=3.12; r²=0.90) and blue marlin (b=3.30; r²=0.91).

References

Akyol O and Ceyhan T (2013) Age and growth of swordfish (Xiphias gladius L.) in the Aegean Sea. Turkish Journal of Zoology 37: 59-64

Amandè JM, Ariz J, Chassot E, Chavance P, Delgado DMA, Gaertner D, Murua H, Pianet R and Ruiz J (2008) Bycatch and discards of the European purse seine tuna fishery in the Indian Ocean. Estimation and characteristic for the 2003-2007 period. Paper presented in Ecosystem and By-catch Working Group, 20 - 22 October 2008. Bangkok. Thailand, 26 pp.

Amandè MJ, Lennert-Cody CE, Bez N, Hall M and Chassot AC (2010) How much sampling coverage affects bycatch estimates in purse seine fisheries? Paper presented in Ecosystem and By-catch Working Group, 20-22 October 2008. Bangkok. Thailand, 16 pp.

Campbell RA and Tuck GN (1998) Preliminary analysis of billfish catch rates in the Indian Ocean. 7th Expert Consultation on Indian Ocean, Victoria, Seychelles, 9-14 November 1998, 19 pp.

Cerna JF (2006) Age and growth of the swordfish (Xiphias gladius Linnaeus, 1758) in the southeastern Pacific off Chile. Latin American Journal of Aquatic Research, Special issue: “Pesquería del pez espada”: 1-11. doi: 10.3856/vol-specissue-fulltext

Chapman L (2001) Bycatch in the tuna longline fishery. 2nd SPC Heads of Fisheries Meeting (Noumea, New Caledonia, 23-27 July 2001).

Cramer J and Adams HM (1999) Pelagic longline bycatch. Collective Volume of Scientific Paper ICCAT 49(4): 288-299.

Cramer J, Bertolino A and Scott GP (1998) Estimates of recent shark bycatch by U.S. vessels fishing for Atlantic tuna and tuna-like species. Collective Volume of Scientific Paper ICCAT 48(3): 117-128.

IOTC (Indian Ocean Tuna Commission) (1995) Indian Ocean tuna fisheries data summary, 1983-1993. IPTP Data Summary No. 16, 146 pp.

IOTC (Indian Ocean Tuna Commission) (1997) Indian Ocean tuna fisheries data summary, 1983-1993. IPTP Data Summary No. 17, 155 pp.

IOTC (Indian Ocean Tuna Commission) (2013) Report of the eleventh session of the IOTC working party on billfish. La Réunion, France, 18-22 September 2013. IOTC-2013-WPB11–R[E], 85 pp.

Directorate General of Capture Fisheries (DGCF) (2011) Indonesian Capture Fisheries Statistics 2010. Directorate General of Capture Fisheries, MOMAF, Indonesia.

Lee DW and Scott GP (1992) Development of length and weight regression parameters for Atlantic swordfish (Xiphias gladius). Collective Volume of Scientific Paper ICCAT 39(2): 572- 578.

Mahiswara and Prisantoso BI (2009) Billfish fisheries in Indonesia. Paper presented in IOTC 7th Session of the Working Party on Billfish, 6-10 July 2009 Victoria Seychelles. IOTC-2009-WPB-14, 10 pp

Morato T, Alfonso P, Lourinho P, Barreiros JP, Santos RS and Nash RDM (2001) Length-weight relationship for 21 coastal fish species of the Azores, north-eastern Atlantic. Fisheries Research 50: 297-302. doi: 10.1016/S0165-7836(00)00215-0

Murniyati dan Sunarman (2000) Cooling, Freezing and Preserving of Fish. Penerbit Kanisius. 220 pp (in Indonesian).

Pauly D (1993) Fishbyte Section. Editorial. NAGA, The ICLARM Quarterly 16: 26.

Petrakis G and Stergiou KI (1995) Weight-Length Relationships for 33 Fish Species in Greek Waters. Fisheries Research 21: 465-469.

Prince ED and Lee DW (1989) Development of length regressions for Atlantic Istiophoridae. Collective Volume of Scientific Paper ICCAT 30(2): 364-374.

Prager MH, Prince ED and Lee DW (1995) Empirical length and weight conversion equations for blue marlin, white marlin and sailfish from the north Atlantic Ocean. Bulletin of Marine Science 56(1): 201-210.

Prince ED and Miyake PM (1989) Methods of dressing Atlantic billfishes (Istiophoridae) by ICCAT reporting countries. Collective Volume of Scientific Paper ICCAT 30(2): 375-381.

Sawant BT, Chakraborty SK, Jaiswar AK, Bhagabati SK, Kumar T and Sawant PB (2013) Comparative length-weight relationship of two species of catfishes, Arius caelatus (Valenciennes, 1840) and Arius tenuispinis (Day, 1877) from Mumbai waters. Indian Journal of Geo-Marine Sciences 42(2): 266-269.

Setyadji B, Jumariadi and Nugraha B (2012) Catch estimation and size distribution of billfishes landed in Port of Benoa, Bali. Indonesian Fisheries Research Journal 18(1): 35-40.

Su NJ, Sun CL, Yeh SZ, Chiang WC, Wang SP and Liu CH (2005) LJFL and EFL relationship for the billfishes caught by the Taiwanese offshore and coastal fisheries. A working paper submitted to the 1st Joint Intercessional Meeting of the Swordfish and Marlin Working Group of ISC. August 29 - September 2, 2005.

Sun CL, Wang SP and Yeh SZ (2002) Age and growth of the swordfish (Xiphias gladius L.) in the waters around Taiwan determined from anal-fin rays. Fishery Bulletin 100(4): 822-835.

Varghese SP, Vijayakumaran K, Anrose A and Mhatre VD (2013) Biological aspect of swordfish, Xiphias gladius Linnaeus, 1758, caught during tuna longline survey in the Indian Seas. Turkish Journal of Fisheries and Aquatic Sciences 13: 529-540.

Zar JH (1996) Biostatistical Analysis, 3rd Edition. Prentice- Hall, Englewood Cliffs, NJ, 662 pp.