<span style="font-size:15.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Mangal; color:black;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language: AR-SA" lang="EN-US">Stock Assessment of white fish, <i style="mso-bidi-font-style:normal">Lactarius lactarius</i> (Bloch and Schneider,1801) along Ratnagiri Coast of Maharashtra, India</span>

115-117<span style="font-size:9.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;color:black;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa;mso-bidi-font-weight:bold"="" lang="EN-US">The study on the age, growth and mortality of <span style="font-size:9.0pt; line-height:115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;color:black;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="" lang="EN-US">white fish<span style="mso-bidi-font-weight: bold">, Lactarius lactarius was carried out based on the length frequency data collected during August 2009 to August 2011. The asymptotic length ((L∞)) and growth coefficient (K) were estimated as 366 mm and 0.685 yr-1 respectively. The total, natural and fishing mortalities were 3.31, 1.30 and 2.01 yr-1 respectively. The exploitation rate (U) and exploitation ratio (E) were calculated as 0.61 and 0.62 respectively. Though Emax obtained at 0.91, it is not advisable for a stock to be exploited at that level as in future, it would be detrimental.</span

Studies on growth, mortality and stock assessment of Indian mackerel, <em>Rastrelliger kanagurta</em> (Cuvier, 1817) from Ratnagiri coast of Maharashtra, India

2382-2385Study on the growth and mortality parameters of Indian mackerel, Rastrelliger kanagurta has been carried out based on the length frequency data.  Asymptotic length ((L∞)) and growth coeffient (K) were estimated as 320 mm and 1.87 yr-1 respectively.  Total, natural and fishing mortalities were 8.28, 2.64 and 5.64 yr-1 respectively. The exploitation rate (U) and exploitation ratio (E) were calculated as 0.68 and 0.69 respectively. As the exploitation ratio (E) is below the Emax (0.772) indicating that further increase in efforts can bring more catch of mackerel along the Ratnagiri coast