New data on the morphological variability of the shell of &lt;i&gt;Flexopecten glaber &lt;/i&gt;(Linnaeus, 1758) (Bivalvia, Pectinidae) in the Black Sea

Bondarev, Igor P.

doi:10.35885/ruthenica.2021.30(2).4

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…This preference for such habitats aligns with findings reported in Bulgaria [8]. Notably, the presence of smooth scallops on hard substrates or within seagrass meadows has not been documented in Romania yet, unlike the observations made in Bulgaria or Ukraine [8,24].…”

Section: Discussionsupporting

confidence: 89%

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From Isolated Valves to a Potential Marine Living Resource: History, Documented Distribution and Sustainable Population Enhancement Possibilities of the Smooth Scallop (Flexopecten glaber) on the Romanian Coast

Danilov,

Nenciu,

Țiganov

et al. 2024

Sustainability

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Until recently, the smooth scallop Flexopecten glaber (Linnaeus, 1758) was considered absent from Romanian Black Sea waters, as only isolated valves were documented on beaches of the southern coast. Yet, in 2020, the first living specimens were collected by dredging at 25 m depth in Mangalia. Moreover, in the past three years, a considerable number of live individuals were also retrieved from beam-trawling operations targeting the gastropod Rapana venosa (Valenciennes, 1846) along the Romanian coast, indicating that there is a stable population here. This remarkable expansion of F. glaber in Romanian waters may be explained as a consequence of the Black Sea’s recovery from eutrophication, reduced predatory pressure from the declining population of R. venosa and changing climate conditions. Our research aimed at using all this novel information to document for the first time the occurrence and distribution of this bivalve on the Romanian coast, also considering perspectives for the development of a new type of shellfish mariculture, avoiding any pressure on the natural stock. In total, 386 F. glaber individuals were sampled during 2020–2023, at depths between 22.5 and 33.3 m. The abundance and biomass per station oscillated between 5 and 319 specimens and 51.5 and 7377 g, respectively. A subsample of 122 specimens was preserved and analyzed in the laboratory, revealing an average shell length of 53.54 mm (±4.13 SD) and an average shell height of 49.54 mm (±3.64 SD). The smooth scallop has both ecological and economic value, which makes it a viable candidate for sustainable aquaculture by collecting spat from the most abundant areas and subsequently placing “seedlings” in the appropriate polygons for stock recovery. Ultimately, commercial exploitation from aquaculture installations can be considered, provided a permanent healthy F. glaber population is established on the Romanian coast.

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Section: Discussionsupporting

confidence: 89%

“…Concerning the size of F. glaber individuals on the Romanian coast, the maximum shell length of smooth scallops (63.6 mm) exceeded those reported in Bulgaria (53.48 mm) [8] and Crimea (53.4 mm) [24,26], respectively. The maximum age (9 years) of specimens from Romania was similar to the maximum age found in Bulgaria [8].…”

Section: Discussionmentioning

confidence: 66%

From Isolated Valves to a Potential Marine Living Resource: History, Documented Distribution and Sustainable Population Enhancement Possibilities of the Smooth Scallop (Flexopecten glaber) on the Romanian Coast

Danilov,

Nenciu,

Țiganov

et al. 2024

Sustainability

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“…Initially, the smooth callop in the Black Sea was considered to be a distinct subspecies, but recent data have shown it to be identical to Mediterranean populations and belong to the Pectinidae (Bondarev, 2020). Inhabits coastal areas with sandy or stony bottom substrates with depths of up to 40 meters (Mendo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Karadeniz suları Shabla Burnu yakınlarından yakalanan deniz tarağının (Flexopecten glaber) iç organlarının histolojik yapısı

YORDANOV,

NİKOLOV,

PETROVA-PAVLOVA

et al. 2023

Marine and Life Sciences

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Assessing the possibility for cultivation of the smooth scallops (Flexopecten glaber) along the Bulgarian Black Sea coast requires a from one side very good knowledge of the biology of species, and from the other side internal organs and reproductive tissues, also the changes occurring during reproductive processes. Thus, the study`s aim was to investigate and evaluate the histological structure of internal organs of the Flexopecten glaber caught in Black Sea. Three samples were collected in June 2022 from commercial fishing in Black Sea waters near Cape Shabla. The shell length and weight of each mussel were measured and recorded. The study was carried out by making histological preparations of gonads and internal organs in adult smooth scallops. Hematoxylin and eosin (H&E) staining procedure was used for overview of tissue structures. The histological structure of the gonads and internal organs of scallop was identified and described. The results of current investigation expand the field of knowledge on anatomy and histology of the smooth scallops.

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Growth and morphometric characteristics of the scallop <i>Flexopecten glaber </i>(Bivalvia: Pectinidae) reared in cages off the coast of Crimea (Black Sea)

et al. 2021

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The spat of the scallop Flexopecten glaber were collected in cages with the Pacific oyster Crassostrea gigas cultured on a mussel-and-oyster farm (outer roadstead of Sevastopol Bay). For two years they were reared in plastic cages at a depth of 2-3 m. The cages were periodically withdrawn to measure the size and weight parameters of the molluscs: the length (L, mm), height (H, mm), and width (D, mm) of shells and the total live weight (W, g). The correlations among the parameters under study are presented. The changes in the indices of the frontal (D/L) and sagittal (H/L) curvatures, convexity ((H+D)/L) and conditional volume (H×D×L/1000) of the shells in ontogenesis are shown. Upon reaching a shell length of 30-35 mm, the allometry of the volumetric and weight growth of molluscs changed from positive to negative. The largest values of the shell convexity index were registered in thesame length range. A conclusion about the interval-type growth of F. glaber in linear size and weight is made. It is suggested that the optimal strategy of shell formation in F. glaber in ontogenesis implies the ripening and the first reproduction of the molluscs occurring at the highest volumetric characteristics of the shell. The relationships for the linear size and weight growth ofF. glaber in the first two years of life are obtained. It is concluded that the scallop F. glaber should be considered as a possible element for the diversification of the existing aquaculture of molluscs (mussels and oysters) off the coast of Crimea.

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New data on the morphological variability of the shell of <i>Flexopecten glaber </i>(Linnaeus, 1758) (Bivalvia, Pectinidae) in the Black Sea

Cited by 3 publications

References 10 publications

From Isolated Valves to a Potential Marine Living Resource: History, Documented Distribution and Sustainable Population Enhancement Possibilities of the Smooth Scallop (Flexopecten glaber) on the Romanian Coast

From Isolated Valves to a Potential Marine Living Resource: History, Documented Distribution and Sustainable Population Enhancement Possibilities of the Smooth Scallop (Flexopecten glaber) on the Romanian Coast

Karadeniz suları Shabla Burnu yakınlarından yakalanan deniz tarağının (Flexopecten glaber) iç organlarının histolojik yapısı

Growth and morphometric characteristics of the scallop <i>Flexopecten glaber </i>(Bivalvia: Pectinidae) reared in cages off the coast of Crimea (Black Sea)

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