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Growth, Mortality, And Reproduction Of Poor Cod (Trisopterus Minutus Linn., 1758) In The Central Aegean Sea, Gülnur Meti̇n, Akin Türker İlkyaz, Hasan Tuncay Kinacigi̇l
Growth, Mortality, And Reproduction Of Poor Cod (Trisopterus Minutus Linn., 1758) In The Central Aegean Sea, Gülnur Meti̇n, Akin Türker İlkyaz, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
A total of 1527 of poor cod (Trisopterus minutus Linn., 1758) were collected by trawl hauls between April 2001 and March 2002 from İzmir Bay (central Aegean Sea). The size of the fish (total length) ranged from 10.6 cm (minimum, September) and 24.8 cm (April). The population was composed of 53% males, 41% females, and 6% immature individuals, with a female to male ratio of 1:1.3. The age composition of the samples was from I to V. The von Bertalanffy growth parameters were L_{\infinity} = 28.1 cm, W_{\infinity} = 254.0 g, K = 0.26 y^{-1}, and t_{o} = -1.52 y. …
Use Of Otolith Length And Weight In Age Determination Of Poor Cod (Trisopterus Minutus Linn., 1758), Gülnur Meti̇n, Akin Türker İlkyaz
Use Of Otolith Length And Weight In Age Determination Of Poor Cod (Trisopterus Minutus Linn., 1758), Gülnur Meti̇n, Akin Türker İlkyaz
Turkish Journal of Zoology
Totally 189 poor cod (Trisopterus minutus Linn., 1758) specimens were collected by trawling in the central Aegean Sea between April 2001 and March 2002. The relationship of the otolith length and weight with the age of poor cod was investigated, as the age determination is relatively difficult by otolith readings. There was a linear relationship between the fish length (LT) and the otolith length (L_{o}), i.e. L_{o} = 0.421 LT + 1.659 (R^{2} = 0.998), a linear relationship between the fish age (T) and the otolith weight (W_{o}), i.e. W_{o} = 0.041 T - 0.030 (R^{2} = 0.994), and a …
Age And Growth Characteristics Of Himri Barbel (Barbus Luteus Heckel, 1843) In Orontes River, Turkey, Kaya Gökçek, İhsan Akyurt
Age And Growth Characteristics Of Himri Barbel (Barbus Luteus Heckel, 1843) In Orontes River, Turkey, Kaya Gökçek, İhsan Akyurt
Turkish Journal of Zoology
In this study, the age and growth of Himri Barbel (Barbus luteus Heckel, 1843) were determined based on specimens collected from Orontes River-Turkey, during the period from February 2004 to January 2005. This population comprised 7 age groups of males and 9 of females. The male and female ratio was 1:1.26 (M:F). Total length-weight relationship was estimated as W = 0.0129TL^{2.986} for females, W = 0.0125TL^{3.003} for males. Growth parameters of the von Bertalanffy equation were computed for females and males as: L_{infinite}= 38.77, W_{infinite}= 714.23, k = 0.300, t_0 = -1.69 and L_{infinite}= 40.32, W_{infinite}= 819.35, k = 0.247, …