scholarly journals A New Maximum Size Record of the Shi Drum (Umbrina cirrosa Linnaeus, 1758) for Aegean Sea

2020 ◽  
Author(s):  
Ö. Cengiz ◽  
Ş. Ş. Paruğ
Keyword(s):  
Aegean Sea ◽  
Maximum Size ◽  
September 11 ◽  
Maximum Length ◽  
Total Weight ◽  
Single Specimen ◽  
Total Length ◽  
New Findings ◽  
The World ◽  
Northern Aegean Sea

Abstract The present study has been conducted to find out new findings on maximum length and weight values of Umbrina cirrosa in the Bay of Saros (Northern Aegean Sea, Turkey). On September, 11, 2016, a single specimen of Umbrina cirrosa with 68.8 cm total length and 2600.00 g total weight was caught by handline at a depth of 20 m. The provable size is the second largest length ever reported in the all seas of the world

scholarly journals The Maximum Length Record of the Blackspot Seabream (Pagellus bogaraveo Brünnich, 1768) for the Entire Aegean Sea and Turkish Territorial Waters

2020 ◽  
Vol 8 (10) ◽  
pp. 2125-2130
Author(s):  
Şenol Paruğ ◽  
Özgür Cengiz
Keyword(s):  
Stock Assessment ◽  
Biological Activities ◽  
Aegean Sea ◽  
Maximum Length ◽  
Northern Spain ◽  
Domestic Markets ◽  
Total Length ◽  
North East ◽  
The North ◽  
Pagellus Bogaraveo

The maximum length, weight, and age information of organisms in an ecosystem, moreover, the first records of migrated exotic species are essential in terms of the basis for the studies on population dynamics, stock assessment, and biological activities. Therefore, the recording of such data may be necessary for scientific databases and new related studies. The Blackspot seabream (Red seabream - Pagellus bogaraveo), which belongs to the Sparidae family, is an important seafood which is marketed fresh and frozen around the Mediterranean and the Aegean seas. Nowadays, this species has high prices depending on market demands in domestic markets as a result of overfishing and is also cultured in northern Spain. It is classified as “Near Threatened Species” in the red list due to its decreasing population trend by the IUCN. A single specimen of the Blackspot seabream with 30.7 cm in total length and 390.00 g in total weight, which was angled in the Saros Bay with a handline by a fisherman on February 08, 2019, was obtained from a fishmonger in Çanakkale. Even though there are bigger individuals in the North-east Atlantic probably depending on polar and/or deep-sea gigantism, the mentioned measurement is the proven maximum total length of this species for the Aegean Sea up to the time.

scholarly journals Northernmost occurrence of Hemiramphus far (Actinopterygii: Hemiramphidae) in the Aegean Sea

2010 ◽  
Vol 11 (1) ◽  
pp. 173 ◽  
Author(s):  
N. AKCA ◽  
M. BILECENOGLU
Keyword(s):  
New Record ◽  
Aegean Sea ◽  
Single Specimen ◽  
Northern Aegean Sea ◽  
Established Population ◽  
Hemiramphus Far

A new record of Hemiramphus far from the northern Aegean Sea is presented, based on a single specimen collected off Eski Foça shores, Turkey. Further individuals were observed (but not collected) in the same area, indicating an established population.

scholarly journals Biology of the thornback ray (Raja clavata Linnaeus, 1758) in the North Aegean Sea

2021 ◽  
Vol 50 (2) ◽  
pp. 115-127
Author(s):  
Koray Cabbar ◽  
Cahide Çiğdem Yiğin
Keyword(s):  
Aegean Sea ◽  
Total Weight ◽  
Total Length ◽  
The North ◽  
Disc Width ◽  
Thornback Ray ◽  
Raja Clavata ◽  
North Aegean ◽  
Males And Females ◽  
North Aegean Sea

Abstract The study deals with aspects of the population dynamics in the thornback ray (Raja clavata L., 1758), one of the most abundant cartilaginous fish caught in the North Aegean Sea. Females accounted for 73.08% and males 26.92% of all individuals. Total length of females and males ranged between 50.2 and 89.9 cm (disc width: 33.4–62.0 cm), and between 43.1 cm and 82.7 cm (disc width: 30.7–64.2 cm), respectively. Relationships between total length (TL) and total weight (TW), and between disc width (DW) and total weight (TW) were described by the equations: TW = 0.0041 TL3.10 and TW = 0.0178 DW3.03, respectively. Age data derived from vertebrae readings were used to estimate growth parameters using the von Bertalanffy function: L∞ = 101.71 cm, K = 0.18 y−1, t0 = −0.07 y for males and L∞ = 106.54 cm, K = 0.16 y−1, t0 = −0.28 y for females. The maximum age was 8 years for males and females. Total length at first maturity of males and females was 70.9 cm and 81.2 cm, respectively. Based on the gonadosomatic index and gonadal macroscopic observations, it was determined that the spawning period lasted throughout the year. Stomach content analysis showed that crustaceans (53.03% IRI) and teleosts (14.70% IRI) were the most preferred prey.

scholarly journals Fecundity of Chub Mackerel (Scomber japonicus Houttuyn, 1782) in the Aegean Sea

2020 ◽  
Author(s):  
Ö. Cengiz
Keyword(s):  
Reproductive Biology ◽  
Aegean Sea ◽  
Total Weight ◽  
Scomber Japonicus ◽  
Chub Mackerel ◽  
Absolute Fecundity ◽  
Total Length ◽  
The Absolute

Abstract This study was carried out in April - June 2014 to determine absolute fecundity (F) of the chub mackerel (Scomber japonicus Houttuyn, 1782) in Saros Bay (Aegean Sea, Turkey). The relations between the absolute fecundity and total length, total weight and age of the chub mackerel females were estimated as F=0.0318TL4.81, F=1573.9TW- 42858 and F=109607A-136129, respectively. This study aims to contribute to the reproductive biology of S. japonicus by reporting the first findings about the absolute fecundity of the species for the Aegean Sea.

scholarly journals Occurrence of Rudderfish (Centrolophus niger Gmelin, 1789) in Saroz Bay (Northern Aegean Sea, Turkey)

2019 ◽  
Vol 7 (5) ◽  
pp. 799 ◽  
Author(s):  
Özgür Cengiz ◽  
Şükrü Şenol Paruğ ◽  
Bayram Kızılkaya
Keyword(s):  
Aegean Sea ◽  
First Record ◽  
Single Specimen ◽  
Northern Aegean Sea

A single specimen of the rudderfish (Centrolophus niger Gmelin, 1789) was caught using the handline by fishermen on 14 April 2016 in İbrice Bight (Saroz Bay). This paper represents the first record of C. niger for Saroz Bay.

Occurrence of shortfin mako shark, Isurus oxyrinchus Rafinesque, 1810, off Turkey's coast

2015 ◽  
Vol 8 ◽  
Author(s):  
Hakan Kabasakal
Keyword(s):  
Aegean Sea ◽  
Seasonal Occurrence ◽  
Free Swimming ◽  
Mako Shark ◽  
New Born ◽  
Total Length ◽  
Isurus Oxyrinchus ◽  
Shortfin Mako ◽  
Northern Aegean Sea ◽  
New Evidence

Review of the available literature and the results of the present study revealed that 17 specimens ofIsurus oxyrinchuswere caught between 1950 and 2013. Nine (52.9%) of these verified 17 catches were recorded after 2000. Catches ofI. oxyrinchusoff Turkey's coast include specimens ranging from new-borns (65 cm total length) to huge adults (585 cm total length). A new-born female caught off the coast of Foça on 19 May 2015 represents the smallest free-swimming specimen ofI. oxyrinchusever recorded in Turkish waters. The occurrence of a new-born shortfin mako shark off Foça's coast provides new evidence to support the possibility of a mating region of lamniform sharks, includingI. oxyrinchus, in the northern Aegean Sea. The seasonal occurrence of both young and adult shortfin mako sharks off Turkey's Aegean and Mediterranean coasts should be monitored to clarify whether the shortfin mako shark is a resident or a vagrant species along the aforementioned coastline.

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