The effect of sexual dimorphism on growth of the black sea turbot, Psetta maxima

Aydın, İlhan; Şahin, Temel; Kolotoğlu, Lütfi; Özongun, M.

doi:10.3153/jfscom.2011006

Cited by 3 publications

(2 citation statements)

References 17 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Male-biased SSD is evolutionary linked to increased male-male competition, territoriality, or female-choice [ 8 ]. Conversely, female-biased SSD is linked to increased fecundity of larger females and decreased male-male competition [ 8 ]; it has been observed, among the others, in turbot Psetta maxima [ 9 , 10 ] and in the European eel Anguilla anguilla [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Sex dimorphism in European sea bass (Dicentrarchus labrax L.): New insights into sex-related growth patterns during very early life stages

et al. 2021

View full text Add to dashboard Cite

The European sea bass (Dicentrarchus labrax) exhibits female-biased sexual size dimorphism (SSD) early in development. New tagging techniques provide the opportunity to monitor individual sex-related growth during the post-larval and juvenile stages. We produced an experimental population through artificial fertilization and followed a rearing-temperature protocol (~16°C from hatching to 112 days post-hatching, dph; ~20°C from 117 to 358 dph) targeting a roughly balanced sex ratio. The fish were tagged with microchips between 61 and 96 dph in five tagging trials of 50 fish each; individual standard length (SL) was recorded through repeated biometric measurements performed between 83 to 110 dph via image analyses. Body weight (BW) was modelled using the traits measured on the digital pictures (i.e. area, perimeter and volume). At 117 dph, the fish were tagged with microtags and regularly measured for SL and BW until 335 dph. The experiment ended at 358 dph with the sexing of the fish. The sex-ratio at the end of the experiment was significantly in favor of the females (65.6% vs. 34.4%). The females were significantly longer and heavier than the males from 103 dph (~30 mm SL, ~0.44 g BW) to 165 dph, but the modeling of the growth curves suggests that differences in size already existed at 83 dph. A significant difference in the daily growth coefficient (DGC) was observed only between 96 and 103 dph, suggesting a physiological or biological change occurring during this period. The female-biased SSD pattern in European sea bass is thus strongly influenced by very early growth differences between sexes, as already shown in previous studies, and in any case long before gonadal sex differentiation has been started, and thus probably before sex has been determined. This leads to the hypothesis that early growth might be a cause rather than a consequence of sex differentiation in sea bass.

show abstract

Section: Introductionmentioning

confidence: 99%

Sex dimorphism in European sea bass (Dicentrarchus labrax L.): New insights into sex-related growth patterns during very early life stages

et al. 2021

View full text Add to dashboard Cite

show abstract

“…В возрасте 30 мес. при интенсивном культивировании самки черноморского калкана весят значительно больше самцов: 1.45±0.37 кг и 1.19±0.25 кг, соответственно (Aydin et al, 2011). Поэтому в промышленной аквакультуре рыб рода Scophthalmus возникла заинтересованность в выращивании исключительно самок, из-за их быстрого весового роста и более позднего созревания.…”

Section: перевод на питание инертными кормами и подращивание мальковunclassified

The Black Sea kalkan and the turbot, its closest relative

Khanaychenko¹,

Гирагосов²

2021

View full text Add to dashboard Cite

This book resumes many years of research experience of the authors and their colleagues, as well as numerous European and Chinese experimental and field studies on the developmental biology and physiology of valuable commercial fish, the Black Sea kalkan (Scophthalmus maeoticus) and the Atlantic turbot (Scophthalmus maximus), closest relatives and, according to modern genetic research, presumably, one species. The history of formation of currently powerful industrial turbot aquaculture presented in this book is based on the analysis of numerous scientific and applied research on turbot mariculture and economic features of formation of its European, in particular, Spanish and Chinese clusters. Recommended for researchers – biologists and biotechnologists, university professors, students of biological and biotechnology specialties, specialists in aquaculture, fish farming, ecology, as well as for a wider range of readers, managers, economists and operators of aquaculture enterprises.

show abstract

Long‐term changes in community composition and life‐history traits in a highly exploited basin (northern Adriatic Sea): the role of environment and anthropogenic pressures

Barausse

Michieli

Riginella

et al. 2011

Journal of Fish Biology

View full text Add to dashboard Cite

The changes in a marine community in the northern Adriatic Sea were explored over a period of 65 years using landings data from a commercial fishing fleet, and the role of fishing pressure and environmental variations in driving these changes was investigated. A total of 40 taxonomic categories, including one or several species, were analysed, representing 93·7% of the total landings. From 1945 to 2010 a significant decrease in the evenness index was observed, indicating a trend towards landings dominated by fewer taxa. The composition of the landings showed a temporal shift during the 1980s; from 1945 to the 1980s a continuous, clear change in composition took place, probably driven by an increase in fishing pressure as well as riverine nutrient inputs. Since the 1980s, a different trend of changing composition emerged. Among the analysed predictors, fishing capacity, summer seawater temperature, inflow from the Po River (the major river of the northern Adriatic Sea) and nutrients were related to the changes in landings. In relation to life-history traits of the landed species, the community shifted from large, late-maturing species to more fecund, smaller and earlier-maturing species. A high fishing pressure is probably the major cause of these changes, possibly acting synergistically with environmental variations.

show abstract

The effect of sexual dimorphism on growth of the black sea turbot, Psetta maxima

Cited by 3 publications

References 17 publications

Sex dimorphism in European sea bass (Dicentrarchus labrax L.): New insights into sex-related growth patterns during very early life stages

Sex dimorphism in European sea bass (Dicentrarchus labrax L.): New insights into sex-related growth patterns during very early life stages

The Black Sea kalkan and the turbot, its closest relative

Long‐term changes in community composition and life‐history traits in a highly exploited basin (northern Adriatic Sea): the role of environment and anthropogenic pressures

Contact Info

Product

Resources

About