Sürdürülebilir Kalkınma Amaçları
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- MakaleAçık Erişim2016Scopus SJRQ4Comparison of number and shape of parr marks in three species of the genus Salmo and two ecotypes of cultured brown trout Salmo trutta from Turkey
Kocabas, M.; Bascinar, N.; Kutluyer, F.
This study focused on the variation in number and shape of parr marks in three fish species of the genus Salmo [S. abanticus Tortonese, (1954), S. caspius Kessler, (1877) and S. labrax Pallas, (1814)] and two ecotypes of cultured brown trout [S. trutta macrostigma (Dumeril, 1858) and S. trutta fario Linnaeus, (1758)]. The brown trouts were collected from 11 streams in Turkey by electrofishing and transferred to the laboratory in an aerated container and then stocked in the adaptation tanks. Artificially fertilized eggs were incubated and larvae were maintained in fiberglass tanks and the variations in number and shape of parr marks in all five groups were studied for one year. The data collected indicated that there were significant differences in the number and size (length and width) of parr marks among the groups (p<0.05). The highest number of parr marks (11-13) was recorded in S. trutta macrostigma. Parr marks on the skin of S. trutta. macrostigma was found to remain stable during development.
AtıfWoS2OpenAlex2
İncele - MakaleYalnız künye2014Scopus SJRQ4Gillnet selectivity for Luciobarbus esocinus (Heckel, 1843) in Keban Dam Lake, Elazig, Turkey
Yuksel, Fahrettin; Gunduz, Fatih; Demirol, Ferhat
A study was conducted to determine the selectivity of monofilament gillnets with mesh sizes of 50, 60, and 70 mm that are used in Keban Dam Lake for fishing Luciobarbus esocinus (Heckel, 1843). During the study, a total of 394 L. esocinus were caught. Selectivity parameters were estimated using the indirect estimation method developed by Holt (1963). Optimum selection lengths for L. esocinus were calculated to be 36.61, 43.94 and 51.26 cm for gillnets with mesh sizes of 50, 60, and 70 mm, respectively. Common selectivity factor was estimated to be 7.32, with standard deviation 4.58. Length at first maturity of female L. esocinus (50 cm) was compared to the optimum selection lengths of gillnets with mesh sizes of 50, 60, and 70 mm. Results indicate that gillnets with mesh size of 70 mm would be appropriate for harvesting L. esocinus in the Keban Dam Lake, as the optimum selection length (51.26 cm) is greater than length at first maturity.
AtıfWoS4İncele - DergiINDIAN JOURNAL OF FISHERIES