219 research outputs found
A new record of the Blue-Barred Parrotfish, Scarus ghobban (Actinopterygii: Scaridae), from the coastal waters of Cyprus
No full textFiliz, Halit/0000-0003-0096-6123WOS: 00034040510001
Diet composition of smooth-hound, Mustelus mustelus (Linnaeus, 1758), in Aegean Sea, Turkey
No full textFiliz, Halit/0000-0003-0096-6123WOS: 000271229000009[No abstract available
First occurrence of a lesser amberjack Seriola fasciata (Bloch, 1793) in the Aegean coasts of Turkey with morphological and molecular identification
No full textThe lesser amberjack Seriola fasciata (Bloch, 1793), is an Atlantic species that expanded its distribution range throughout the Mediterranean (from the Balearic Islands to Haifa Bay). On October 7th 2018, one individual of S. fasciata was caught by a recreational fisher from Didim Akbük (37?23?N, 27?25?E) at a depth of approximately 30 m. The specimen was identified using morphological and molecular methods. This species is observed for the first time from the Turkish Aegean coasts, and it is expanding its distributional range northwards in the Aegean Sea. The current status and historical distribution of S. fasciata in the Mediterranean basin is also presented. © 2020 Elsevier B.V.Authors would like to thank Mr. ?mit Ko? for providing a specimen and anonymous reviewers for valuable and constructive contributions. All authors approved the version of the manuscript to be published. This research did not receive any funds from agencies of the public, commercial, or not-for-profit sectors. This study was carried out through the citizen science network of the authors. The specimen was part of fisheries catches and was not collected by authors
Length-weight relationships of three macrourid fishes in the eastern Aegean Sea, Turkey
No full textSymposium on Grenadiers of the World Oceans - Biology, Stock Assessment, and Fisheries held at the 136th Annual Meeting of the American-Fisheries-Society - SEP 11, 2006 - Lake Placid, NYWOS: 000258525400013Length-weight relationships of three macrourid fishes (saddled grenadier Coelorinchus coelorhincus (formerly known as Caelorinchus caelorhincus), glass-head grenadier Hymenocephalus italicus and bluntsnout grenadier Nezumia sclerorhynchus from Sigacik Bay on the Turkish coast of the Aegean Sea are presented. Overall, 923 specimens of three different species of the family Macrouridae were weighed and measured. The sample size ranged from 43 for bluntsnout grenadier to 782 for saddled grenadier. The values of the exponent b in the length-weight regressions (W=aL(b)) varied between 2.51 (glasshead grenadier) and 3.49 (bluntsnout grenadier). Regressions of length-weight relationships were significant for all species. Positive allometry in weight vs. length for bluntsnout grenadier, isometry in saddled grenadier, and negative allometry for glasshead grenadier were observed.Amer Fisheries So
Age and growth, reproduction and diet of the black goby, (Gobius niger) from Aegean Sea, Turkey
No full textBlack gobies, Gobius niger L., 1758, were sampled monthly between March 2003 and February 2004 in Izmir Bay involving 1149 specimens. Length distribution varied between 5.1 and 15.2 cm total length. Age determined from direct reading on otoliths was comprised from zero to five years. There were significant differences in mean lengths at age group for the two sexes, which did not allow the use of combined data. The parameters of the fitted Von Bertalanffy growth equation (with seasonal component, birth date on the of January) were L& #8734; = 16.69 cm, k= 0.301 , = -2.205 for males, and L& #8734; = 14.84 cm, k= 0.321 , = -1.459 for females. Macroscopic examination of the gonads, and analysis of the monthly values of the gonadosomatic index, indicated that reproduction starts in March and lasts during October, with a maximum in March, followed by August and October. Individuals become sexually mature around 7.80 cm TL (a size that can be reached in less than 1 year) for females. In this population, the sex ratio (male:female) was 3.6:1. Stomach contents were mainly Mollusca (%IRI= 47.53), Crustacea (%IRI= 42.94), Polychaeta (%IRI= 8.26), Foreminifera (%IRI= 1.14) and Teleostei (%IRI= 0.13)
DETERMINATION OF SAGITTAL OTOLITH BIOMETRY AND BODY SIZE OF Serranus cabrilla (Linnaeus, 1758) DISTRIBUTED IN SOUTHERN AEGEAN SEA
No full textFish otoliths are generally used to determine taxon, age and size of the teleost fishes and are useful tools for studies of prey-predator relationships, population dynamics and ichthyo-archaeology. In the present study, the equations for the relationships were calculated between fish length (TL), weight (W) versus sagittal otolith length (OL), height (OH) and weight (OW) in comber (Serranus cabrilla, Linnaeus, 1758) specimens (N=310, 95–225 mm in TL and 7.54–111.27 g) captured via bottom trawl vessels from off the Güllük Bay (Southern Aegean Sea) between January and December 2013. Since there has been no statistical differences between left and right otoliths (p>0.05), left otoliths were used for calculations. Regression formulas were calculated as follows: TL=28.75*OL–22.31, TL=64.36*OH–6.808, TL=2380*OW0.640, W=0.056*OL3.618 , W=2.029*OH3.254, W=5168*OW–28.33, OH=0.414*OL–0.054, OW=0.0000053*OL1.542, and OW=0.003*OH1.382. The aim of this study is to fill in the missing data concerning otolith and fish size relationships of the species in the southern Aegean Sea, thereby providing researchers studying food habits of top predators to determine the size and weight of prey fish from length or weight of recovered otoliths
Food habits of the hollowsnout grenadier, Caelorinchus caelorhincus (Risso, 1810), in the Aegean Sea, Turkey
No full textFiliz, Halit/0000-0003-0096-6123WOS: 000255137600010Stomach contents of 148 hollowsnout grenadier, Caelorinchus caelorhincus (RISSO, 1810), were examined. Crustaceans were found to be most important prey group in the diet. Polychaetes constituted the second most important prey group. Chaetognathans were only occasionally eaten
The Occurrence of the Cadenat's Rockfish, <I>Scorpaena Loppei</I> (Actinopterygii: Scorpaeniformes: Scorpaenidae), in the Eastern Aegean Sea
No full textAkcinar, Salim Can/0000-0003-1369-8332; Filiz, Halit/0000-0003-0096-6123; Yapici, Sercan/0000-0003-2288-5084WOS: 000279803600011One specimen of the Cadenat's rockfish, Scorpaena loppei Cadenat, 1943 ( Scorpeanidae), was caught off Marmaris (eastern Aegean Sea, Turkey) on 27 December 2008 by bottom trawl net. The specimen was 56.15 mm total length. S. loppei is evidently rare in the Aegean Sea than it is in the western Mediterranean
Fig. 1 in New sighting of the endangered species blackchin guitarfish, Rhinobatos cemiculus, in the South Aegean Sea
No full textFig. 1 Map showing the locations of Rhinobatos cemiculus records in the Aegean Sea (1-Corsini-Foka (2009), 2- Akyol and Capapé (2014), 3-Present study)Published as part of Halit Filiz, Gökçen Bilge, Daniela Giannetto & Sercan Yapı c, 2016, New sighting of the endangered species blackchin guitarfish, Rhinobatos cemiculus, in the South Aegean Sea, pp. 1-4 in Marine Biodiversity Records 9 (13) on page 2, DOI: 10.1186/s41200-016-0009-6, http://zenodo.org/record/26945
Estimation of Age, Growth and Reproduction of Boarfish, Capros aper, in the South Aegean Sea
No full textYapici, Sercan/0000-0003-2288-5084; Filiz, Halit/0000-0003-0096-6123WOS: 000341675800023The present study investigated the age, growth, reproduction of boarfish (Capros aper L., 1758) collected from the South Aegean Sea between December 2009 and November 2010. The length-weight relationship was W= 0.019*L-2 93 (n=790; r(2)= 0.95). Age data based on otoliths were comprised from 0(+) to 4(+). The parameters of the fitted von Bertalanffy growth equation were L-infinity,= 11.05 cm, k = 0.447 year(-1), t(0) = -0.480. Macroscopic gonad examination and analysis of the monthly values of the GSI, indicated that reproduction occurs between April and August. Individuals become sexually mature at around 6.69 cm total length (TL) (a size that can be reached on 1.84 years) for both sexes. Sex ratio (female:male) was found as 1.00:0.74.Mugla University Scientific Research FundMugla Sitki Kocman University [BAP 09/31]This research was supported by Mugla University Scientific Research Fund (BAP 09/31). We would like to thank the "Republic of Turkey, Ministry of Agriculture and Rural Affairs, General Directorate of Protection and Control" and "Turkish Coast Guard Command (TCGC)" and "TCG Aegean Sea Area Command" for giving trawl permission in prohibited areas during the survey. Also, the authors would like to thank the two anonymous reviewers for their suggestions and comment
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