scholarly journals Growth pattern, mortality and reproductive biology of common sole, Solea solea (Linneaus, 1758), in the Sea of Marmara, Turkey

2021 ◽  
Vol 50 (4) ◽  
pp. 398-410
Author(s):  
Abdullah Ekrem Kahraman ◽  
Taner Yıldız ◽  
Uğur Uzer ◽  
Özgür Çanak
Keyword(s):  
Growth Pattern ◽  
Growth Parameters ◽  
Gonadosomatic Index ◽  
Fishing Mortality ◽  
Seasonal Growth ◽  
Allometric Growth ◽  
Sea Of Marmara ◽  
Solea Solea ◽  
The Common ◽  
Common Sole

Abstract The study deals with the growth pattern, mortality, and reproduction of common sole, Solea solea (Linneaus, 1758), from the Sea of Marmara (Turkey). A total of 580 fish specimens were sampled monthly from October 2017 to September 2018. The total length of all sampled individuals ranged from 11.1 to 29.5 cm, corresponding to ages from 1 to 3 years. The length–weight relationship was expressed as W = 0.022 TL2.6838, where the slope indicated negative allometric growth. Growth parameters were L ∞ = 33.7 cm, k = 0.48, and t 0 = −0.18 for all samples. A seasonally oscillating growth model, indicating the amplitude of oscillations, revealed an important seasonal growth pattern. Total, natural, and fishing mortality rates were calculated as 1.42, 0.47, and 1.01, respectively. The exploitation ratio (E = 0.68) indicates that the fishing pressure on the common sole in the Sea of Marmara was high. The sex ratio (♀/♂) was 1.18. The gonadosomatic index (GSI) for females showed that two main spawning seasons were observed: one in spring (May) and one in autumn (September–October). Sizes at the onset of sexual maturity were estimated for both females and males at 21.6 and 18.6 cm, respectively.

Determinacy of fecundity in sole (Solea solea) from the Bristol Channel

1990 ◽  
Vol 70 (4) ◽  
pp. 803-813 ◽  
Author(s):  
J. W. Horwood ◽  
M. Greer Walker
Keyword(s):  
Bay Of Biscay ◽  
English Channel ◽  
Potential Fecundity ◽  
Frequency Distributions ◽  
The North ◽  
Size Frequency ◽  
Solea Solea ◽  
The North Sea ◽  
The Common ◽  
Common Sole

Ovaries of the common sole (Solea solea (Linnaeus)) were collected prior to, or at the beginning of, spawning from the spawning grounds in the Bristol Channel. Size frequency distributions of oocytes over 100 μm are presented. They clearly show a break in the size frequency distributions, at about 170 μm, indicating that the production of new oocytes to be spawned that season had ceased. It indicates that the sole is a determinate spawner and that, at least for this population, an annual potential fecundity can be measured. Estimated annual fecundity at length of Bristol Channel sole is calculated, and values are compared with those found for sole from the North Sea, eastern English Channel and the Bay of Biscay.

Breathing Movements in Entobdella Soleae (Trematoda, Monogenea) from the Skin of the Common Sole

1962 ◽  
Vol 42 (1) ◽  
pp. 93-104 ◽  
Author(s):  
G. C. Kearn
Keyword(s):  
Oxygen Content ◽  
Sea Water ◽  
The Body ◽  
Scyliorhinus Canicula ◽  
Solea Solea ◽  
Flat Fish ◽  
The Common ◽  
The Relationship ◽  
Common Sole

An undulating movement of the body was observed in Entobdella soleae, a monogenean found on the blind surface of a mud-dwelling flat-fish, Solea solea, at Plymouth. The movement is described and shown to have a breathing function, the rate of undulation increasing with decreasing oxygen content of the ambient sea water and vice versa.The relationship between the movement and micro-habitat is discussed and the phenomenon is compared with breathing movements in other muddwelling animals.A similar movement was noted in three other skin-parasitic monogeneans: Acanthocotyle sp. from Raia clavata, Pseudocotyle squatinae from Squatina squatina and Leptocotyle minor from Scyliorhinus canicula.

Characterisation of three variants of estrogen receptor β mRNA in the common sole, Solea solea L. (Teleostei)

2007 ◽  
Vol 153 (1-3) ◽  
pp. 31-39 ◽  
Author(s):  
Elisa Caviola ◽  
Luisa Dalla Valle ◽  
Paola Belvedere ◽  
Lorenzo Colombo
Keyword(s):  
Estrogen Receptor ◽  
Estrogen Receptor Β ◽  
Solea Solea ◽  
The Common ◽  
Common Sole

The opercular bond in the egg-shell of the monogenean Entobdella soleae, a platyhelminth skin parasite of the common sole (Solea solea)

Parasitology ◽  
1999 ◽  
Vol 118 (4) ◽  
pp. 433-438
Author(s):  
G. C. KEARN ◽  
R. EVANS-GOWING ◽  
T. TAPPENDEN
Keyword(s):  
Embryonic Development ◽  
Outer Surface ◽  
Outer Region ◽  
Cement Layer ◽  
Solea Solea ◽  
Inner Surface ◽  
The Common ◽  
Egg Shell ◽  
Common Sole

The monogenean (platyhelminth) skin parasite Entobdella soleae from the common sole (Solea solea) lays tetrahedral eggs. One of the 4 corners of the tetrahedron is a detachable operculum which is bonded to the rest of the egg-shell by cement. Most of this cement layer, beginning at the inner surface of the shell and running through almost to the outer surface (a distance of about 2 μm), is more or less uniform in thickness (30–38 nm), or tapers slightly. About 345 nm from the outer surface the cement layer narrows abruptly to about 10 nm. The cement is exposed on the inner surface of the shell, but in most eggs a layer of shell about 10 nm thick covers the narrow outer region of the cement layer. When experimentally perforated eggs were incubated with trypsin, the wide inner layer of cement was digested, but the narrow outer region initially remained intact. These observations are discussed in relation to the following (1) survival of the eggs during embryonic development, (2) hatching, (3) the ‘hinge’ often connecting the operculum to the empty egg-shell, (4) the rapid hatching that occurs in some other monogeneans.

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