Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea
In this study, we determined the biological characteristics and indices of abundance and biomass of two demersal species, turbot and thornback ray, through a scientific trawl survey of Bulgarian Black Sea waters in the autumn of 2020. Turbot is among the most valuable fish species in the Black Sea,...
Published in: | Fishes |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3390/fishes8080400 https://doaj.org/article/467dbfb2f10341989232b4f15b928a93 |
id |
ftdoajarticles:oai:doaj.org/article:467dbfb2f10341989232b4f15b928a93 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:467dbfb2f10341989232b4f15b928a93 2023-09-26T15:22:54+02:00 Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea Feriha M. Tserkova Vesselina V. Mihneva Elitsa P. Petrova-Pavlova 2023-08-01T00:00:00Z https://doi.org/10.3390/fishes8080400 https://doaj.org/article/467dbfb2f10341989232b4f15b928a93 EN eng MDPI AG https://www.mdpi.com/2410-3888/8/8/400 https://doaj.org/toc/2410-3888 doi:10.3390/fishes8080400 2410-3888 https://doaj.org/article/467dbfb2f10341989232b4f15b928a93 Fishes, Vol 8, Iss 400, p 400 (2023) demersal fish length frequency distribution length–weight relationships biomass and abundance spatial patterns Biology (General) QH301-705.5 Genetics QH426-470 article 2023 ftdoajarticles https://doi.org/10.3390/fishes8080400 2023-08-27T00:35:42Z In this study, we determined the biological characteristics and indices of abundance and biomass of two demersal species, turbot and thornback ray, through a scientific trawl survey of Bulgarian Black Sea waters in the autumn of 2020. Turbot is among the most valuable fish species in the Black Sea, and thornback ray is a sensitive cartilaginous species with a significantly declining abundance throughout the Mediterranean region. The stock biomass of turbot was estimated at 1467.6 tons, with a relative abundance of 896,922 individuals, and those of the thornback ray were 1187.9 tons and 519,606 individuals, respectively. Mean turbot abundance, interpolated into 0.5° latitude/longitude grid cells, ranged between 52 and 120 ind·km −2 , with a mean biomass of 78.26–238.31 kg·km −2 , and for the thornback ray, these indices were within the limits of 0–107 ind·km −2 and 0–219 kg·km −2 . The distribution of the different length classes of the two fish species by depth layer was analyzed. Length–weight relationships were estimated based on combined samples of both sexes and separately for female and male individuals, allowing a better understanding of growth patterns. Article in Journal/Newspaper Scophthalmus maximus Turbot Directory of Open Access Journals: DOAJ Articles Fishes 8 8 400 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
demersal fish length frequency distribution length–weight relationships biomass and abundance spatial patterns Biology (General) QH301-705.5 Genetics QH426-470 |
spellingShingle |
demersal fish length frequency distribution length–weight relationships biomass and abundance spatial patterns Biology (General) QH301-705.5 Genetics QH426-470 Feriha M. Tserkova Vesselina V. Mihneva Elitsa P. Petrova-Pavlova Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea |
topic_facet |
demersal fish length frequency distribution length–weight relationships biomass and abundance spatial patterns Biology (General) QH301-705.5 Genetics QH426-470 |
description |
In this study, we determined the biological characteristics and indices of abundance and biomass of two demersal species, turbot and thornback ray, through a scientific trawl survey of Bulgarian Black Sea waters in the autumn of 2020. Turbot is among the most valuable fish species in the Black Sea, and thornback ray is a sensitive cartilaginous species with a significantly declining abundance throughout the Mediterranean region. The stock biomass of turbot was estimated at 1467.6 tons, with a relative abundance of 896,922 individuals, and those of the thornback ray were 1187.9 tons and 519,606 individuals, respectively. Mean turbot abundance, interpolated into 0.5° latitude/longitude grid cells, ranged between 52 and 120 ind·km −2 , with a mean biomass of 78.26–238.31 kg·km −2 , and for the thornback ray, these indices were within the limits of 0–107 ind·km −2 and 0–219 kg·km −2 . The distribution of the different length classes of the two fish species by depth layer was analyzed. Length–weight relationships were estimated based on combined samples of both sexes and separately for female and male individuals, allowing a better understanding of growth patterns. |
format |
Article in Journal/Newspaper |
author |
Feriha M. Tserkova Vesselina V. Mihneva Elitsa P. Petrova-Pavlova |
author_facet |
Feriha M. Tserkova Vesselina V. Mihneva Elitsa P. Petrova-Pavlova |
author_sort |
Feriha M. Tserkova |
title |
Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea |
title_short |
Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea |
title_full |
Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea |
title_fullStr |
Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea |
title_full_unstemmed |
Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot ( Scophthalmus maximus ) and Thornback Ray ( Raja clavata ), Estimated by a Trawl Survey in Western Black Sea |
title_sort |
biological parameters and biomass and abundance indices of two demersal species, turbot ( scophthalmus maximus ) and thornback ray ( raja clavata ), estimated by a trawl survey in western black sea |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/fishes8080400 https://doaj.org/article/467dbfb2f10341989232b4f15b928a93 |
genre |
Scophthalmus maximus Turbot |
genre_facet |
Scophthalmus maximus Turbot |
op_source |
Fishes, Vol 8, Iss 400, p 400 (2023) |
op_relation |
https://www.mdpi.com/2410-3888/8/8/400 https://doaj.org/toc/2410-3888 doi:10.3390/fishes8080400 2410-3888 https://doaj.org/article/467dbfb2f10341989232b4f15b928a93 |
op_doi |
https://doi.org/10.3390/fishes8080400 |
container_title |
Fishes |
container_volume |
8 |
container_issue |
8 |
container_start_page |
400 |
_version_ |
1778148804299587584 |