The length-weight (LWR) and length-length (LLR) relationships of Nemipterus randalli (Russel, 1986), an invasive species in Iskenderun Bay

Ramazan YAZICI, Okan YAZICIOĞLU, Mahmut YILMAZ, Tamer AKKAN, Cengiz MUTLU, Nazmi POLAT


This study was carried out to determine the length-weight and length-length relationships of the Randall's threadfin bream (Nemipterus randalli Russel, 1986) living in the İskenderun Bay. In November 2018, a total of 187 Randall's threadfin bream were obtained. The total length, fork length and standard lengths of the samples were measured, and their weights were weighed. In the study, length-weight and length - length relationships were established using total length. The b value of the length -weight relationship in females, males and all individuals was determined as 2.985, 2.715 and 2.830, respectively. It was determined that the calculated b values were significantly different from 3 in male individuals and in the entire sample (t-test, P<0.05). Therefore, females showed isometric growth, while males showed negative allometric growth. Within the scope of length-height relationships, high correlations were obtained between all size types of the species.


İskenderun Bay; Invasive Species; Length-weight Relationships; Nemipterus randalli

Full Text:



Arndt, E., Givan, O., Edelist, D., Sonin, O., & Belmaker, J. (2018). Shifts in eastern Mediterranean fish communities: Abundance changes, trait overlap, and possible competition between native and non-native species. Fishes, 3, 19.

Ateş, C., Cerim, H., & Celik, M. (2017). Length-weight relationships of commercial indigenous and Lessepsian fishes in Gökova Bay, Turkey. Cahiers de Biologie Marine, 58(1), 43-47.

Aydın, İ., & Akyol, O. (2016). Occurrence of Nemipterus randalli Russell, 1986 (Nemipteridae) of Izmir Bay, Turkey. Egyptian Journal of Aquatic Research, 18, 267-74.

Bagenal, T. B., & Tesch, F. W. (1978). Age and Growth, in: Bagenal T.B. (Edt). Methods for Assessment of Fish Production in Freshwaters, Oxford. Blackwell Science Publication, London.

Bakhsh, A. A. (1994). The biology of Thread Bream Nemipterus japonicus (Bloch) from Jizan Region of the Red Sea. Journal of King Abdulaziz University-Marine Sciences, 7, 179–189.

Bilecenoglu, M., & Russell, B. C. (2008). Record of Nemipterus randalli Russell, 1986 (Nemipteridae) from Iskenderun Bay, Turkey. Cybium, 23, 115–130.

Bilge, G., Yapıcı, S., Filiz, H., & Cerim, H. (2014). Weight–length relations for 103 fish species from the southern Aegean Sea, Turkey. Acta ichthyologica et piscatoria, 44(3), 263-269.

Bolger, T., & Connolly, P. L. (1989).The Selection of Suitable İndices for the Measurement and Analysis of Fish Condition. Journal of Fish Biology, 34(2), 171-182.

Demirci, S., Demirci, A., & Şimşek, E. (2020). The Validation of Different Growth Models of Randall's Threadfin Bream, Nemipterus randalli (Russell, 1986), in Northeastern Mediterranean Sea. Pakistan Journal of Zoology, 52(3), 1113-1119.

Erguden, D., Turan, C., & Gurlek, M. (2009). Weight–length relationships for 20 Lessepsian fish species caught by bottom trawl on the coast of Iskenderun Bay (NE Mediterranean Sea, Turkey). Journal of Applied Ichthyology, 25(1), 133-135.

Erguden, D., Turan, C., Gurlek, M., Yaglioglu, D., & Gungor, M. (2010). Age and growth of the Randall’s threadfin bream Nemipterus randalli (Russell, 1986), a recent Lessepsian migrant in Iskenderun Bay, northeastern Mediterranean. Journal of Applied Ichthyology, 26(3), 441-444.

Froese, R. (2006). Cube law, condition factor and weight–length relationships: history, meta‐analysis and recommendations. Journal of applied ichthyology, 22(4), 241-253.

Gilaad, R. L., Galil, B. S., Diamant, A., & Goren, M. (2017). The diet of native and invasive fish species along the eastern Mediterranean coast (Osteichthyes). Zoology in The Middle East, 63, 325-335.

Gökoglu, M., Güven, O., Balci, B. A., Çolak, H., & Golani, D. (2009). First records of Nemichthys scolopaceus and Nemipterus randalli and second record of Apterichthus caecus from Antalya Bay, Southern Turkey. Marine Biodiversity Records, 2, e29.

Gonçalves, J. M. S., Bentes, L., Lino, P. G., Ribeiro, J., Canário, A. V., & Erzini, K. (1997). Weight-length relationships for selected fish species of the small-scale demersal fisheries of the south and south-west coast of Portugal. Fisheries research, 30(3), 253-256.

Goren, M., Galil, B. S., Diamant, A., Stern, N., & Levitt-Barmats, Y. A. (2016). Invading up the food web? Invasive fish in the southeastern Mediterranean Sea. Marine Biology, 163, 1-11.

Gülşahin, A., & Kara, A. (2013). Record of Nemipterus randalli Russell, 1986 from the southern Aegean Sea (Gökova Bay, Turkey). Journal of Applied Ichthyology, 29, 933-934.

Gurlek, M., Erguden, S. Yaglioglu, D. Turan, F. Demirhan, S. Gurlek, M. Gungor, M. Ozbalcilar, B., & Ozcan, T. (2010). Feeding habits of Indo-Pacific Species Nemipterus randalli Russel, 1986 (Nemipteridae) in Iskenderun Bay, Eastern Mediterranean Sea. Ciesm, 39, 539.

Hanafi, N. A., Mohamed, A. R., & Al-Dubakel, A. Y. (2010). Fishery, growth and mortality of the threadfin bream, Nemipterus japonicus (Bloch, 1791) (Pisces: Nemipteridae) from the southern Sudanese waters, Red Sea. Basrah Journal of Agricultural Science, 2, 187–199.

Hossain, M. Y., Jasmine, S., Ibrahim, A. H. M., Ahmed, Z. F., Rahman, M. M., & Ohtomi, J. (2009). Length–weight and length–length relationships of 10 small fish species from the Ganges, Bangladesh. Journal of Applied Ichthyology, 25(1), 117-119.

Innal, D., Aksu, M., Akdoganbulut, D., Kisin, B., Can, M., Unal, M. O., & Pek, E. (2015). Age and growth of Nemipterus randalli from Antalya Gulf-Turkey. International Journal of Fisheries and Aquatic Studies, 2(4), 299-303.

Kalhoro, M. A., Tang, D., Ye, H., Morozov, E., Liu, Q., Memon, K. H., & Kalhoro, M. T. (2017). Population dynamics of Randall’s threadfin bream Nemipterus randalli from Pakistani waters, Northern Arabian Sea. Indian Journal of Geo-Marine Sciences, 46(3), 551- 561.

Moutopoulos, D. K., & Stergiou, K. I. (2002). Length–weight and length–length relationships of fish species from the Aegean Sea (Greece). Journal of Applied Ichthyology, 18(3), 200-203.

Otero, M., Cebrian, E., Francour, P., Galil, B., & Savini, D., (2013). Monitoring marine invasive species in Mediterranean Marine Protected Areas (MPAs): A strategy and practical guide for managers. Malaga, Spain: IUCN.

Özen, M.R., & Çetinkaya, O. (2020). Population composition, growth and fisheries of Nemipterus randalli Russell, 1986 in Antalya Gulf, Mediterranean Sea, Turkey. Acta Aquatica Turcica, 16(3), 330-337.

Özvarol, Y. (2014). Length-weight relationships of 14 fish species from the Gulf of Antalya (northeastern Mediterranean Sea, Turkey). Turkish Journal of Zoology, 38(3), 342-346.

Ricker, W. E. (1975). Computation and Interpretation of Biological Statistics of Fish Populations, Bull. Fish. Res. Board. Can., Kanada.

Russell, B. C. (1990). Vol. 12. Nemipterid fishes of the world (threadfin breams, whiptail breams, monocle breams, dwarf monocle breams and coral breams): An annotated and illustrated catalogue of nemipterid species known to date. Rome, IT: Food and Agriculture Organization of the United Nations.

Siddique, M. A. M., Rahman, M., Khan, N. S., & Islam, M. M. (2021). Size frequency, length-weight, and length-length relationship of bearded worm goby Taenioides cirratus (Blyth, 1860) from the Noakhali Coast, Bay of Bengal. Thalassas: An International Journal of Marine Sciences, 37, 347-351.

Sinovčić, G., Franičević, M., Zorica, B., & Čikeš‐Keč, V. (2004). Length–weight and length–length relationships for 10 pelagic fish species from the Adriatic Sea (Croatia). Journal of Applied Ichthyology, 20(2), 156-158.

Sonwal, M. C., Kingston Samuel, D., Lakshmanan, R., & Paulraj, J. (2022). Length‐weight relationship of five species of Nemipteridae family along the Gulf of Mannar, Eastern Indian Ocean. Journal of Applied Ichthyology, 38(2), 265-267.

Taylan, B., & Yapıcı, S. (2021). Reproductive biology of non-native Nemipterus randalli Russell, 1986 and native Pagellus erythrinus (Linnaeus, 1758) from the Aegean Sea. North-Western Journal of Zoology, 17, 180-186.

Tsagarakis, K., Başusta, A., Başusta, N., Biandolino, F., Bostanci, D., Buz, K., Djodjo, Z., Dulčić, J., Gökoğlu, M., Gücü, A. C., Machias, A., Maravelias, C. D., Özvarol, Y., Polat, N., Prato, E., Vasilakopoulos, P., & Yedier, S. (2015). New Fisheries-related Data from The Mediterranean Sea (October 2015). Mediterranean Marine Science , 16(3), 703-713.

Uyan, U., Filiz, H., Tarkan, A. S., Çelik, M., & Top, N. (2019). Age and growth of Nemipterus randalli in the southern Aegean Sea, Turkey. Journal of The Black Sea/Mediterranean Environment, 25(2), 140-149.

Yazıcı, R., & Saylar, Ö. (2022). Length-Weight and Length-Length Relationships and Condition Factor of An Endemic Fish Species (Capoeta tinca (Heckel, 1843)) Inhabiting Bayat Pond (Ankara, TÜRKİYE). Bilge International Journal of Science and Technology Research, 6(2), 132-137.

Yazıcı, R., Yılmaz, S., Yazıcıoğlu, O., & Polat, N. (2015). Population structure and growth of rudd Scardinius erythrophthalmus (L., 1758) from a eutrophic lake in northern Anatolia. Croatian Journal of Fisheries: Ribarstvo, 73(3), 94-102.

Yazıcıoğlu, O., & YAZICI, R. (2016). The Length-Weight, Length-Length Relationship and Condition Factor of Angora Loach, Oxynoemacheilus angorae (Steindachner, 1897) Inhabiting Kılıçözü Stream in Kızılırmak River Basin (Central Anatolia-Turkey). Turkish Journal of Agriculture-Food Science and Technology, 4(12), 1165-1168.

Yazıcıoğlu, O., & Yazıcı, R. (2023). Some Biological Features of Tench (Tinca tinca, L., 1758) Inhabiting Sıddıklı Dam. Black Sea Journal of Agriculture, 6(2), 204-209.

Yazıcıoğlu, O., Yazıcı, R., & Akkan, T. (2023). Harşit Çayı’nda Yaşayan Squalius orientalis Heckel, 1847’in Kondisyon Faktörü Boy-Ağırlık ve Boy-Boy İlişkileri. Journal of Anatolian Environmental and Animal Sciences, 8(1), 140-145.

Yilmaz, S., Yazicioğlu, O., Yilmaz, M., & Polat, N. (2010). Length-weight and length-length relationships of Capoeta sieboldii from Hirfanli Dam Lake, Turkey. Journal of Freshwater Ecology, 25(2), 205-209.

Zar, J. H. (1999). Biostatistical Analysis, 4th ed., Prentice-Hall, New Jersey.


  • There are currently no refbacks.