Spatial and temporal variation in the distribution and abundance of pelagic fish eggs and larvae off Giresun, south-eastern Black Sea, Turkey

Şahin, Ahmet; Düzgüneş, Ertuğ

doi:10.3750/aiep/02559

Cited by 4 publications

(1 citation statement)

References 18 publications

(28 reference statements)

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“…The Black Sea anchovy spawns almost everywhere in the Black Sea (Ivanov & Beverton, 1985), whereas the Azov anchovy spawns the Sea of Azov (Chashchin et al ., 2015). The spawning period extends from May to the end of September, with an average of 42,000 eggs per individual (Sahin & Duzgunes, 2019; Yaşar, 2007). The spawning and nursery areas of anchovy are often located in coastal areas and associated with river mouths and estuaries (Casaucao et al ., 2021).…”

Section: Introductionmentioning

confidence: 99%

Using otolith and body shape to discriminate between stocks of European anchovy (Engraulidae: Engraulis encrasicolus) from the Aegean, Marmara and Black Seas

Khan

Bal

Battal

et al. 2022

Journal of Fish Biology

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European anchovy, a small pelagic fish, plays a significant role in the blue economy, with remarkable commercial, ecological and culinary values. In this study, the variability in the shapes of the body and sagitta otoliths was examined to identify the different anchovy stocks in the Black Sea (26.5 E-39.9 E, 38.7 N-42.1 N) and adjacent regions, i.e., the Sea of Marmara and the Aegean Sea. The body shape was assessed with geometric morphometrics, while shape indices and elliptic Fourier analysis were used to evaluate the shape of the sagitta otoliths. The data were analysed using multivariate and univariate analysis of variance, discriminant function and principal component analysis. The anchovy population could be divided into five distinct stocks based on body shape, with an overall leave-one-out cross-validated correct classification of 85.6%. The geometric morphometrics revealed significant differences in body depth, snout, lower jaw and caudal fin. The differences in sagitta otolith shape also revealed the existence of four distinct stocks with an overall leave-one-out crossvalidated correct classification of 46.5%-69.3%. The elliptic Fourier analysis revealed two main stocks of anchovy from the Black Sea as the Eastern-Middle Black Sea stock and the Western Black Sea stock. Based on the elliptic Fourier analysis, the differences in the sagitta otoliths increase in magnitude with increasing geographic separation, first manifested at the otolith anterior notch, followed by changes in the otolith width. The findings affirmed the existence of distinct stocks that should have important implications for effective management of this pelagic fish in the Black Sea and adjacent regions.

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Section: Introductionmentioning

confidence: 99%

Using otolith and body shape to discriminate between stocks of European anchovy (Engraulidae: Engraulis encrasicolus) from the Aegean, Marmara and Black Seas

Khan

Bal

Battal

et al. 2022

Journal of Fish Biology

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Ichthyoplankton in the Northern Part of the Black Sea under the Prolongation of Summer Hydrological Season in 2020

Klimova,

Subbotin,

Vdodovich

et al. 2024

Inland Water Biol

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Ichthyoplankton in the northern part of the Black Sea under prolongation of summer hydrological season in 2020

Klimova,

Subbotin,

Vdodovich

et al. 2024

Biologiâ vnutrennih vod

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The species diversity and spatial distribution of ichthyoplankton in the shelf and deep-sea waters of the northern half of the Black Sea near the Crimean Peninsula and the shores of the Caucasus under the conditions of prolongation of the summer hydrological season 2020 for September–October are presented. The high temperatures of the upper layer of the sea, peculiar of the summer spawning season, caused a continuation of productive spawning of warm-water fish. Eggs and larvae of 19 species from 12 families were identified in the ichthyoplankton. The maximum number of eggs was 302 ind./m2, and larvae — 58 ind./m2. Eggs and larvae of the mass commercial species Engraulis encrasicolus (L., 1758) dominated, whose share in the total population was 92.9 and 84.2% respectively. The highest abundance of ichthyoplankton corresponded to areas with minimal dynamic activity and maximum warming within the limits of coastal-shelf quasi-stationary anticyclonic vortices characteristic of the summer hydrological season.

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Spatial and temporal variation in the distribution and abundance of pelagic fish eggs and larvae off Giresun, south-eastern Black Sea, Turkey

Cited by 4 publications

References 18 publications

Using otolith and body shape to discriminate between stocks of European anchovy (Engraulidae: Engraulis encrasicolus) from the Aegean, Marmara and Black Seas

Using otolith and body shape to discriminate between stocks of European anchovy (Engraulidae: Engraulis encrasicolus) from the Aegean, Marmara and Black Seas

Ichthyoplankton in the Northern Part of the Black Sea under the Prolongation of Summer Hydrological Season in 2020

Ichthyoplankton in the northern part of the Black Sea under prolongation of summer hydrological season in 2020

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