Akademik Veri Yönetim Sistemi
Boletim do Instituto de Pesca, cilt.50, 2024 (SCI-Expanded, Scopus)
Alburnus tarichi accounts for about 30% of the annual inland water catch in Turkiye, which is about 33 thousand tonnes. Lake Van is the world’s largest alkaline lake and Turkiye’s largest lake, at 3,602 km2. Due to the unavailability of detailed data for the data-rich models, the stock of A. tarichi was assessed by the catch-based maximum sustainable yield (CMSY) model, based on catch data from years 1967 to 2021. The values with their confidence intervals were computed for the Lake Van tarek stock by the CMSY model and are showed as follows: MSY = 12.3 (10.8–14.2) ton*1,000, k = 92.4 (66.5–129) ton*1,000, r = 0.536 (0.377–0.76)·year-1, B2021 = 48.0 (29.4–55.1) ton*1,000, BMSY = 46.2 (33.2–64.3) ton*1,000, F2021 = 0.202 (0.180–0.338)·year-1, FMSY = 0.268 (0.189–0.380)·year-1, F2021 /FMSY = 0.772 (0.672–1.260), and B2021 /BMSY = 1.04 (0.636–1.190). This study revealed that the stock of A. tarichi was subjected to significant and continuously increasing fishing pressure from the early unexploited years (1967–1996) and eventually became overfished in subsequent years (1997–2010). After the prohibition of summer fishing in 1997, which significantly reduced recruitment, the stock began to enter a recovery period in the early 2000s. As a result, the stock of A. tarichi has reached a sustainable level currently and has been assessed as a healthy stock based on the CMSY outputs.