Age, growth and population structure of the yellowfin tuna Thunnus albacares (Bonnaterre, 1788) exploited along the east coast of India
Year: 2012
Type: article
Abstract: Lengths measurements of 6,758 yellowfin tuna (Thunnus albacares), landed by hook and line operators off eastern Indian \ncoast were taken (20–185 cm FL) from 2003 to 2009. Age and growth were estimated using length based methods. The von \nBertalanffy growth parameters estimated were L∝ = 197.42 cm, annual K= 0.30 and t0= -0.1157. Mortality estimates were \nM= 0.48 and Z= 0.71 and F= 0.23 with the exploitation ratio E= 0.32. Growth was rapid during the initial years when the \nannual growth increment was as high as 36.6 cm during the first year then which to as low as 3.3 cm in the tenth year. The fish \nattained a fork length of 56.2 cm at the end of one year. Size at maturity (87.5 cm) corresponded to an age of 1.7 years and \nthe oldest individual in the sample was 9+ years (186 cm). The annual mean lengths varied from 80.6 cm to 115.3 cm with \nan average mean length of 101.9 cm. The fishery comprised of mostly adults with 64% comprising of fishes larger than size \nat first maturity.
Source: Indian Journal of Fisheries
Authors: Prathibha Rohit, G Syda Rao, K. Rammohan
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
SDG: Life below water
Open Access status: diamond
OpenAlex ID: W2992677560