Akademik Veri Yönetim Sistemi
Regional Studies in Marine Science, cilt.87, 2025 (SCI-Expanded, Scopus)
This study presents the first comprehensive analysis of the deep-water rose shrimp Parapenaeus longirostris in Antalya Bay, focusing on its growth, mortality, reproductive biology, and stock status. 5295 individuals were collected during monthly surveys from July 2016 to June 2017, using the International Bottom Trawl Survey in the Mediterranean (MEDITS) protocol for the first time in Turkish waters. Average abundance and biomass indices were 4538 individuals/km² and 21.25 kg/km², respectively. Carapace lengths (CL) ranged from 6.95 to 33.20 mm for females and 9.14 to 27.18 mm for males. Seasonalized von Bertalanffy growth parameters were estimated as CL∞ = 36.16 mm, K = 0.52 year−1, tanchor = 0.42 years, C = 0.76 and ts = 0.61 years for females, and CL∞ = 30.68 mm, K = 0.83 year−1, tanchor = 0.29 years, C = 0.99 and ts = 0.25 years for males. Females exhibited slower growth but attained a larger CL∞. Females reached first sexual maturity at a CL of 18.46 mm, compared to 16.82 mm for males. Spawning occurred bimodally, peaking in April–August and November–January. Total annual mortality was 2.13 for females and 3.59 for males, with fishing mortality (F) at 1.04 and 2.14, respectively. Exploitation rates were 0.49 for females and 0.60 for males, indicating overexploitation. Yield-per-recruit and spawning potential ratio analysis confirmed overexploitation, with current F reducing spawning stock biomass to 24 % of its unexploited level. Management recommendations include a 40 % reduction in fishing effort, extended seasonal closures, and square mesh codends to protect juveniles and ensure sustainability.