Population dynamics and stock assessment of two mullet species<i> (Chelon</i><i> auratus</i> Risso, 1810 and<i> Mugil</i><i> cephalus</i> Linneaus, 1758) in the Koyce?iz lagoon-estuary (Mediterranean coast)

Çiloğlu E.

REGIONAL STUDIES IN MARINE SCIENCE, cilt.58, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 58
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.rsma.2022.102791
  • Dergi Adı: REGIONAL STUDIES IN MARINE SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS
  • Anahtar Kelimeler: Chelon auratus, Mugil cephalus, Population dynamics, Growth, Mortality, Exploitation, Recruitment, K?yce?iz Lagoon (Mediterranean coast), LENGTH-WEIGHT RELATIONSHIPS, GOLDEN GREY MULLET, CENTRAL AEGEAN SEA, GROWTH-PARAMETERS, PATTERNS, AGE, IDENTIFICATION, MORPHOLOGY, OTOLITHS, ATLANTIC
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

In this study, the populations and stocks of Chelon auratus and Mugil cephalus in the Koycegiz Lagoon (Mediterranean coast) were investigated. The length-weight relationships, growth performances (phi) and growth coefficients (K) of C. auratus and M. cephalus were determined to be W = 0.0075L2.9744 and W = 0.0041L3.22025, 2.73 and 2.79, 0.185 and 0.230, respectively. C. auratus and M. cephalus had respective total, natural and fishing mortality rates of 1.52 and 1.25, 0.41 and 0.47, and 1.11 and 0.78. The Z/K ratio of C. auratus and M. cephalus was estimated as 2.505 and 1.890, respectively. The recruitment period fluctuated throughout the year for C. auratus, with a peak of 21.6%, a lower level of 13.85% in October and a minimum of 1.85% in January, while the recruitment process of M. cephalus peaked at 3 during the spring. Recruitment peaked from February to April followed by a second peak in September, and fluctuated throughout the year. The recruitment period fluctuated throughout the year for C. auratus, with a peak of 21.6%, a lower level of 13.85% in October and a minimum of 1.85% in January, while the recruitment process of M. cephalus peaked at 3 during the spring, with a steady peak from February to April, followed by a second peak in September, and fluctuated throughout the year. C. auratus and M. cephalus E0.1, E0.5, and Emax values were estimated to be 0.714 and 0.575, 0.371 and 0.379, and 0.852 and 0.875, respectively. The maximum sustainable yields (MSY) of C. auratus and M. cephalus were estimated at 151.24 and 249.31 tonnes, respectively. It has been concluded that the stocks of C. auratus and M. cephalus (especially C. autratus) in the Koycegiz Lagoon (Mediterranean coast) are overexploited.(c) 2022 Elsevier B.V. All rights reserved.