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An investigation of the length-weight relationship for 13 fish species on the eastern coast of Libya in the Mediterranean Sea

Year 2025, Volume: 42 Issue: 3, 241 - 247, 10.09.2025

Eman Salem Alfergani , Mohammad El-mabrok

https://doi.org/10.12714/egejfas.42.3.06

Abstract

We estimated the length–weight relationships (LWRs) for 13 marine fish species from the eastern coast of Libya in the Mediterranean Sea. A total of 325 specimens were collected from four different locations. The LWR parameters (a and b) were determined using the power function model: TW=aTLb. The regression coefficient b ranged from 2.182 (95% CI:1.607–2.689) in Siganus rivulatus to 3.328 (95% CI:2.700–3.955) in Chelon saliens. The coefficient of determination (r²) varied between 0.52 and 0.99. Most species exhibited isometric growth patterns, except for Siganus rivulatus, Sparisoma cretense, and Sardinella aurita, which showed negative allometric growth. These findings contribute valuable baseline data to support fisheries management and conservation efforts in the region.

Keywords

Length-weight parameters marine fishes growth pattern Libya coast

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Akdeniz'de Libya'nın doğu kıyısındaki 13 balık türü için boy-ağırlık ilişkisinin incelenmesi

Year 2025, Volume: 42 Issue: 3, 241 - 247, 10.09.2025

Eman Salem Alfergani , Mohammad El-mabrok

https://doi.org/10.12714/egejfas.42.3.06

Abstract

Akdeniz'deki Libya'nın doğu kıyısındaki 13 deniz balığı türü için boy-ağırlık ilişkilerini (LWR) hesapladık. Dört farklı lokasyondan toplam 325 örnek toplandı. LWR parametreleri (a ve b), güç fonksiyon modeli kullanılarak belirlendi: TW=aTLb. Regresyon katsayısı b, Siganus rivulatus türünde 2,182 (95% CI:1,607-2,689) ile Chelon saliens türünde 3,328 (95% CI:2,700-3,955) arasında değişti. Belirleme katsayısı (r²) 0,52 ile 0,99 arasında değişti. Negatif allometrik büyüme gösteren Siganus rivulatus, Sparisoma cretense ve Sardinella aurita hariç çoğu tür izometrik büyüme sergiledi. Bu bulgular, bölgedeki balıkçılık yönetimi ve koruma çabalarını desteklemek için değerli temel veriler sağlamaktadır.

Keywords

Boy-ağırlık parametreleri deniz balıkları büyüme modeli Libya kıyıları

References

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  • Akel, E. (2009). Fisheries of experimental purse seine net using light and population dynamics of Sardinella aurita (Family Clupeidae) east of Alexandria, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 13(1), 55-77. http://doi.org/10.21608/ejabf.2009.2023
  • Aydın, M., & Bengil, E.G.T. (2020). Feeding habits and length-weight relationships Sciaena umbra Linnaeus, 1758 from Southern Black Sea. Acta Aquatica Turcica, 16(4), 479 486. https://doi.org/10.22392/actaquatr.714094
  • Bagenal, T.B. & Tesch, F.W. (1978). Age and Growth In: T. Bagenal (Ed.), Methods for Assessment of Fish Production in Fresh Waters. IBp handbook No.3 (3rd), Blackwell Sci. Publications, Oxford. PP. 101-136.
  • Baidoo, K., Asare, N.K., & Abobi, S.M. (2022). Length-weight relationship and the condition factor of some important estuarine fish species from Kakum Estuary of Ghana. Ghana Journal of Science Technology and Development, 8(2), 2343–6727. https://doi.org/10.47881/344.967x
  • Bayhan, B., Taylan, B., & Heral, O. (2022). Length-weight and length-length relationships of the Scorpaena species (Actinopteri: Scorpaenidae) in Izmir Bay (Aegean Sea of Turkey). Acta Natura et Scientia, 3(1), 51–58. https://doi.org/10.29329/actanatsci.2022.351.06
  • Bazairi, H., Sghaier, Y., Benamer, I., Langar, H., Pergent, G., Bouras, E., Verlaque, M., Soussi, J., & Zenetos, A. (2013). Alien marine species of Libya: first inventory and new records in El-Kouf National Park (Cyrenaica) and the neighbouring areas. Mediterranean Marine Science, 14(2), 451–462. https://doi.org/10.12681/mms.555
  • Beğburs, C.R., & Kebapçıoğlu, T. (2013). Length-weight relationships for alien fish species caught by demersal trammel nets in the Gulf of Antalya (NE Mediterranean Sea, Turkey). Memba Kastamonu Üniversitesi Su Ürünleri Fakültesi Dergisi, 1(2), 41–43.
  • 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.
  • Bodur, B., Aydın, M., & Karadurmuş, U. (2023). Population structure, exploitation status, and prospects of brown meagre Sciaena umbra Linnaeus, 1758 from the Turkish coast of the Black Sea. Marine Science and Technology Bulletin, 12(1), 1 11. https://doi.org/10.33714/masteb.1178161
  • Cherif, M., Zarrad, R. Gharbi, H. Missaoui, H.& Jarboui, O. (2008). Length-weight relationships for 11 fish species from the Gulf of Tunis (SW Mediterranean Sea, Tunisia). Pan-American Journal of Aquatic Sciences, 3(1),1-5.
  • Čikeš Keč, V., & Zorica, B. (2012). Length–weight relationship, age, growth and mortality of Atlantic chub mackerel Scomber colias in the Adriatic Sea. Journal of the Marine Biological Association of the United Kingdom, 93(2), 341–349. https://doi:10.1017/s0025315412000161
  • Dahel, A., Tahri, M., Bensouilah, M., Amara, R., & Djebar, B. (2016). Growth, age and reproduction of Sardinella aurita (Valenciennes, 1847) and Sardina pilchardus (Walbaum, 1792) in the Algerian eastern coasts. AACL Bioflux, 9(5). http://www.bioflux.com.ro/aacl
  • Dars, B.A., Narejo, N.T., Dayo, A. (2010). Relative condition factor and length-weight relationship of a carp, Labeo gonius (Hamilton) from Keenjhar Lake, district Thatta, Sindh, Pakistan. Sindh University Research Journal, 42, 67-70
  • De Giosa, M., Czerniejewski, P., & Rybczyk, A. (2014). Seasonal changes in condition factor and weight-length relationship of invasive Carassius gibelio (Bloch 1782) from Leszczynskie Lakeland, Poland. Advances in Zoology, 678763. http://dx.doi.org/10.1155/2014/678763
  • Elbaraasi, H. (2014). Length-Weight Relationships for Five Lessepsian Fish Species from the Coast of Benghazi, Libya (Southern Mediterranean). Agriculture, Forestry and Fisheries, 3(3), 178 180. https://doi.org/10.11648/j.aff.20140303.16
  • Elbaraasi, H., Elabar, B., Elaabidi, S., Bashir, A., Elsilini, O., Shakman, E., & Azzurro, E. (2019). Updated checklist of bony fishes along the Libyan coasts (Southern Mediterranean Sea). Mediterranean Marine Science, 20(1), 90–105. https://doi.org/10.12681/mms.1557
  • Falsone, F., Geraci, M.L., Scannella, D., Gancitano, V., Di Maio, F., Sardo, G., Quattrocchi, F., & Vitale, S. (2022). Length-weight relationships of 52 Species from the South of Sicily (Central Mediterranean Sea). Fishes, 7(2), 92. https://doi.org/10.3390/fishes7020092
  • Flura, M.Z., Rahman, B.S., Rahman, M.A., Ashraful, M., Alam, M., & Pramanik, M.H. (2015). Length-weight relationship and GSI of hilsa, Tenualosa ilisha (Hamilton 1822) fishes in Meghna River, Bangladesh. International Journal of Natural and Social Sciences, 2(3):82–88.
  • Froese, R. (2006). Cube law, condition factor and weight–length relationships: history, meta‐analysis and recommendations. Journal of Applied Ichthyology, 22(4), 241 253. https://doi.org/10.1111/j.1439 0426.2006.00805.x
  • Giacalone, V.M., D’anna, G., Badalamenti, F., & Pipitone, C. (2010). Weight‐length relationships and condition factor trends for thirty‐eight fish species in trawled and untrawled areas off the coast of northern Sicily (Central Mediterranean Sea). Journal of Applied Ichthyology, 26(6):954–957. https://doi.org/10.1111/j.1439-0426.2010.01491.x
  • Golani, D., B. Ozturk and N. Basusta. (2006). Fishes of the Eastern Mediterranean. Turkish Marine Research Foundation, Istanbul, Turkey.
  • Gonçalves, J. M. S., Bentes, L., Lino, P. G., Ribeiro, J., Canario, A. V. M. & 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, 253 256. https://doi.org/10.1016/S0165-7836(96)00569-3
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There are 59 citations in total.

Details

Primary Language English
Subjects Ecology (Other)
Journal Section Articles
Authors

Eman Salem Alfergani 0000-0002-5602-1535

Mohammad El-mabrok 0000-0002-7163-8795

Early Pub Date September 1, 2025
Publication Date September 10, 2025
Submission Date May 18, 2025
Acceptance Date July 24, 2025
Published in Issue Year 2025 Volume: 42 Issue: 3

Cite

APA Alfergani, E. S., & El-mabrok, M. (2025). An investigation of the length-weight relationship for 13 fish species on the eastern coast of Libya in the Mediterranean Sea. Ege Journal of Fisheries and Aquatic Sciences, 42(3), 241-247. https://doi.org/10.12714/egejfas.42.3.06