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Öğe Age, growth and reproduction of tub gurnard (Chelidonichthys lucerna L. 1758) in the Bay of Iskenderun in the eastern Mediterranean(Scientific Technical Research Council Turkey, 2004) Ismen, A; Ismen, P; Basusta, NThe age composition, growth parameters, spawning season, sex ratio, length at first sexual maturity and fecundity of tub gurnard (Chelidonichthys lucerna) caught from the Bay of Iskenderun in the eastern Mediterranean Sea were investigated. Females and males made up 58.2% and 41.8%, respectively, of the particular population of the species. The total length of females ranged from 8.0 cm to 30.3 cm, and of males from 8.3 cm to 21.2 cm. The length (L) - weight (W) relationships for males and females were estimated as W = 0.0089*L-3 01 and W = 0.0095*L2-99, respectively. The age data derived from otolith readings were used to estimate the growth parameters of the von Bertalanffy equation. The estimated parameters were: Linfinity = 45.0 cm, K 0.221 and t(omicron), -0.581. The maximum age was 4 for females and 3 for males. The 1-year age group was dominant in both females and males. Males matured at a total length of 18 cm, while females matured at 20 cm. The monthly values of the gonadosomatic index indicated that spawning occurred mainly between December and May. The fecundity (F) - length relationship was logF = -2.512 + 5.58logL (r = 0. 94).Öğe Comparison of morphometric characters of twaite shad (Alosa fallax nilotica, Geoffroy Saint-Hilaire, 1808) among three areas in Turkish seas.(Conseil Superieur De La Peche, 2001) Turan, C; Basusta, NDegree of differentiation among populations of twaite shad, Alosa fallax nilotica, in Turkish territorial waters was evaluated with the truss morphometric system using Discriminant Function (DFA) and Principal Component Analyses (PCA). Approximately 40 individuals were collected from each sea to represent regions. In DFA, the proportion of correctly classified Eastern Mediterranean sea sample to their original group was highest (90 %) with a high overall random assignment of individuals into their original population (78 %). Plotting discriminant function 1 (DF1) and discriminant function 2 (DF2) explained, 100 % of total between group variability and clearly discriminated Eastern Mediterranean sea sample from the Baltic and Aegean sea samples, which were over plotted. This findings was also supported in multivariate analysis of variance. PCA revealed that the observed differences were Mainly from posterior morphometric measurements of the fish. The patterns of morphological differentiation suggested that there is limited exchange of individuals among areas to homogenize populations phenotypically from the Black and Aegean seas to Eastern Mediterranean sea.Öğe Comparison of two different types of basket trap on fish catches in Iskenderun Bay(Tubitak Scientific & Technological Research Council Turkey, 2005) Çekiç, M; Dal, T; Basusta, N; Gökçe, MAThe present study aimed to determine the relative catch efficiencies of two different fish traps in Iskenderun Bay. Trap model A had an entrance supported by a hoop, whilst the entrance of model B was unsupported. Fieldwork was carried out in Pirinclik-Madenli Bight (Iskenderun Bay) between 15 July and 15 November 2001. Forty basket traps were set each day during the 124-day study period. Overall 1242 individuals, 16 species and 11 families of fish and commercial invertebrates were recorded. The total biomass was 317.73 kg. Fishing effort, irrespective of trap models was 0.25% and the highest catch weight was in August, September and October. The amount of by-catch (0.04 kg) and discards (0.07 kg) were quite low.Öğe Morphometric structuring of the anchovy (Engraulis encrasicolus L.) in the Black, Aegean and Northeastern Mediterranean seas(Tubitak Scientific & Technological Research Council Turkey, 2004) Turan, C; Ergüden, D; Gürlek, M; Basusta, N; Turan, FThe status of populations of anchovies in Turkish terrestrial waters was preliminarily investigated using morphometric characters with the truss network system. Samples were taken from the main fishing areas of each sea, comprising the central (Sinop) and eastern (Trabzon) Black Sea, the Aegean Sea (Izmir) and the eastern Mediterranean (Iskenderun). Plotting discriminant functions 1 and 2, explaining 93% of between-group variability, revealed a high degree of dissimilarity among the anchovy samples, indicating that the anchovies in each sea represent different aggregations. The overall random assignment of individuals into their original group was high (80%). Pairwise comparisons using multivariate analysis of variance (MANOVA) showed highly significant differences between all the samples (P < 0.001). Univariate analysis of variance (ANOVA) revealed significant differences with varying degrees between the means of the 4 samples for 16 out of 25 standardized morphometric measurements. Principal components analysis (PCA) indicated that the observed differences were mainly from the measurements taken from the head.Öğe A new fish record from the Levant sea(Laser Pages Publ Ltd, 2002) Basusta, N; Turan, C; Gurlek, M[Abstract Not Available]Öğe A new fish record from Turkish seas(Scientific Technical Research Council Turkey, 2002) Basusta, N; Turan, C; Gürlek, MTwo and five specimens of the blackfin sorcerer, Nettastoma melanurum, were trawled on 25 and 30 April 2001 respectively at Samandag, Hatay (36degrees10'N, 35'20'E; 36degrees05'N, 35degrees40'E) at about 80-200 m depth. It is recorded for the first time from the eastern Mediterranean coast of Turkey. Thus, a new species and family have been added to the fish fauna in Turkish seas.Öğe Two new fish records for the Turkish seas: Round stingray Taeniura grabata and skate stingray Himantura uarnak (dasyatidae)(Laser Pages Publ Ltd, 1998) Basusta, N; Erdem, U; Kumlu, M[Abstract Not Available]Öğe Weight-length relationships for selected fish species of the small-scale fisheries off the south coast of Iskenderun Bay(Scientific Technical Research Council Turkey, 2002) Can, MF; Basusta, N; Çekiç, M[Abstract Not Available]
