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Full-Text Articles in Animal Sciences
The Reproductive Performance Of Wild And Hatchery-Reared Flounder, Platichthys Flesus Luscus, In The Southern Black Sea Coast, İlhan Aydin, Temel Şahi̇n, Hamza Polat, Erdi̇nç Güneş
The Reproductive Performance Of Wild And Hatchery-Reared Flounder, Platichthys Flesus Luscus, In The Southern Black Sea Coast, İlhan Aydin, Temel Şahi̇n, Hamza Polat, Erdi̇nç Güneş
Turkish Journal of Zoology
The spawning period, total fecundity, egg size, and fertilization and hatching rates of wild and hatchery-reared flounder, Platichthys flesus luscus, are investigated in this report. Wild and hatchery-reared broodstock consisted of 18 females (452.8 ± 193.2 g) and 17 females (138.9 ± 47.4 g), respectively. The spawning period lasted 79 days, from 22 January to 10 April. Mean total fecundity was 285 ± 157.9 × 10^3 per female for wild broodstock while it was 115.6 ± 53.6 × 10^3 eggs for hatchery-reared broodstock. The fertilization and hatching rates were 38.2 ± 17.0% and 62.3 ± 24.1% for wild and 45.3 …
Growth, The Length-Weight Relationship, And Reproduction In Vimba (Vimba Vimba L. 1758) Sampled From An Oligo-Mesotrophic Lake In Northwest Anatolia (Turkey), Hacer Okgerman, Mahmut Elp, Cumhur H. Yardimci
Growth, The Length-Weight Relationship, And Reproduction In Vimba (Vimba Vimba L. 1758) Sampled From An Oligo-Mesotrophic Lake In Northwest Anatolia (Turkey), Hacer Okgerman, Mahmut Elp, Cumhur H. Yardimci
Turkish Journal of Zoology
The growth parameters and reproduction period in vimba (Vimba vimba L. 1758) sampled from Sapanca Lake were determined monthly between September 2003 and July 2004. The 335 vimba specimens caught ranged in age from 2^+ to 6^+ years, and the majority of the samples consisted of individuals of the 4^{+}-year-old age group. The length-weight relationship was estimated to be W = 0.0084 FL^{3.1797±0.0035} for males (r^2 = 0.94, P < 0.05) and W = 0.0089 FL^{3.1572±0.0033} for females (r^2 = 0.93, P < 0.05). Regression coefficients for sex were significant (t-test, P < 0.05). The slope (b) significantly differed (ANCOVA, P < 0.05) between months. The fact that the b values for male and female vimba specimens differed from 3.0 indicates that there was positive allometric growth. The von Bertalanffy equation was determined using Lt = 28.940 (1-exp {-0.123[t+2.193]}), \phi': 2.030, (r = 0.999) for males and Lt = 24.708 [1-exp {-0.205[t+1.464]}), \phi': 2.097, (r = 0.999) for females. The sex ratio was 1:1.86 (\chi^2; P < 0.05). The spawning period of vimba began at the end of April and continued until the beginning of July; the water temperature during this period was between 14.8 and 25.9 °C.
Reproductive Performance Of Turbot (Psetta Maxima) In The Southeastern Black Sea, İlhan Aydin, Temel Şahi̇n
Reproductive Performance Of Turbot (Psetta Maxima) In The Southeastern Black Sea, İlhan Aydin, Temel Şahi̇n
Turkish Journal of Zoology
Spawning time, total fecundity, fertilization, and hatching rates of turbot (Psetta maxima) were investigated in 10 wild female broodstock (mean wt: 3809.7 ± 1238.4 g). Spawning lasted 37 days, from April 17 to May 23. Mean total fecundity was 2329 ± 1260 x 10^3 eggs per female. Fertilization and hatching rates were 30.6 ± 25.4% and 17.9 ± 16.1%, respectively. A significant positive correlation was observed between body weight and total fecundity (r = 0.637, P < 0.05). The timing and frequency of hand stripping, fecundity, fertilization, and hatching rates in turbot are presented.
Age, Growth And Reproduction Of Four-Spotted Goby, Deltentosteus Quadrimaculatus (Valenciennes, 1837), In İzmir Bay (Central Aegean Sea), Gülnur Meti̇n, Akin Türker İlkyaz, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Age, Growth And Reproduction Of Four-Spotted Goby, Deltentosteus Quadrimaculatus (Valenciennes, 1837), In İzmir Bay (Central Aegean Sea), Gülnur Meti̇n, Akin Türker İlkyaz, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
Length distribution, sex ratio, length-weight relationship, age, growth, spawning period, age, and length at first maturity of four-spotted goby inhabiting İzmir Bay were investigated. A total of 1696 four-spotted goby were collected by trawl hauls between July 2004 and June 2007. The size of the fish sampled ranged from 3.1 to 9.2 cm total length. The samples were composed of 31.1% females, 27.7% males, and 41.2% juvenile individuals, with a female to male ratio of 1:0.89. The age of the fish ranged from 1 to 5 years. The length-weight relationship and the von Bertalanffy growth function were estimated for all …