Fisheries Biology, Assessment and Management

Age and growth of bassan barbel, <I>Barbus pectoralis</I> (Actinopterygii: Cypriniformes: Cyprinidae), under conditions of a dam reservoir

“…Ergene (1998) and İkiz et al (1998) report higher values for the condition coefficient (1.47-1.61 and 1.121-1.667 respectively), while Balık (1980) and Topkara and Balık (2004) mention almost similar with the present study values (1.142-1.315 and 1.315-1.481, respectively). Variation in the condition factor of fish may be indicative of food abundance, adaptation to the environment and gonadal development (King 1995).…”

Reproductive Characteristics of Doublespotted Queenfish, <I>Scomberoides Lysan</I> (Actinopterygii: Perciformes: Carangidae), from Sri Lankan Waters: Implications for Fisheries Management

“…A logistic regression curve was fitted to the data to estimate length at 50% maturity (L 50 ) by the use of a non-linear least-squares procedure weighted by the number of fish in each length-class. The form of regression equation used was (King 1995): [-r(L -Lm)] ) -1 where: P m is the percentage of mature individuals, r is the slope of the curve or rate of increase in maturity, L m is length at 50% maturity, and L is the 5 cm length class. Probit analysis was performed using computer based 'R' software to estimate L 50 .…”

Assessment of impact of fishing on Indian mackerel Rastrelliger kanagurta (Cuvier, 1816) in Tuticorin, south-east coast of India

“…Ova diameter was measured under microscope using the Swift cam software, with a view to understand the monthly occurrence of mature ovaries. Size at first maturity was estimated following King (1996) for pooled data as there was no clear difference in the size between male and female). Length-weight relationship was derived as in Le Cren (1951).…”