Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)

The bivalves of the family Mytilidae – Crenomytilus grayanus (Dunker, 1853) and Modiolus kurilensis Bernard, 1983 – are Pacific, Asian species and mass representatives of upper sublittoral epifauna in coastal waters of Peter the Great Bay (the Sea of Japan). C. grayanus is a traditional commercial...

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Main Authors: L. G. Sedova, D. A. Sokolenko
Format: Article
Language:English
Published: A. O. Kovalevsky Institute of Biology of the Southern Seas of RAS 2023-03-01
Series:Морской биологический журнал
Subjects:
Online Access:https://marine-biology.ru/mbj/article/view/373
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author L. G. Sedova
D. A. Sokolenko
author_facet L. G. Sedova
D. A. Sokolenko
author_sort L. G. Sedova
collection DOAJ
description The bivalves of the family Mytilidae – Crenomytilus grayanus (Dunker, 1853) and Modiolus kurilensis Bernard, 1983 – are Pacific, Asian species and mass representatives of upper sublittoral epifauna in coastal waters of Peter the Great Bay (the Sea of Japan). C. grayanus is a traditional commercial species, and M. kurilensis is a promising one; resources of both molluscs are significant. The aim of the work is the comparative analysis of spatial distribution and biomass of C. grayanus and M. kurilensis on different types of bottom sediments and habitat depths in Peter the Great Bay. The investigation was carried out in 2007–2019 by scuba diving hydrobiological techniques at depths of down to 20 m. The data were analyzed for 5,911 stations; Mytilidae representatives were found at 1,635 stations. For mytilids, vital mass of each individual was determined, and mean biomass was estimated. The landscape diversity of Peter the Great Bay bottom determines an almost ubiquitous distribution of C. grayanus and M. kurilensis, and this reflects good adaptation of molluscs to conditions typical for this part of their area. Monospecific aggregations of C. grayanus prevailed both on hard and soft bottom sediments (78.6 and 38.2% of total stations with Mytilidae, respectively), while mixed aggregations of both species prevailed on soft bottom sediments (38.3%). On soft bottom sediments, monospecific aggregations of M. kurilensis were more common (23.5%) than on hard ones (8.1%). In Peter the Great Bay, mean biomass of C. grayanus on hard bottom sediments was (728 ± 47) g·m−2 varying from 524 g·m−2 (the Amur Bay) to 922 g·m−2 (eastern Peter the Great Bay). The value for mean biomass of C. grayanus on soft bottom sediments was (491 ± 51) g·m−2 varying from 228 g·m−2 (the Ussuri Bay) to 829 g·m−2 (the Amur Bay), except for southwestern Peter the Great Bay and Boisman Bay, where the value was below 50 g·m−2. Mean biomass of M. kurilensis on hard bottom sediments was (370 ± 74) g·m−2 varying from 18 g·m−2 (Baklan Bay) to 656 g·m−2 (the Empress Eugénie Archipelago water areas). The value for mean biomass of M. kurilensis on soft bottom sediments was (335 ± 37) g·m−2 varying from 77 g·m−2 (southwestern Peter the Great Bay) to 456 g·m−2 (the Amur Bay), except for Boisman and Baklan bays where the species was rare. In Peter the Great Bay, maximum values of the mean biomass for both species were recorded at depths of 1–10 m (C. grayanus, 664–805 g·m−2; M. kurilensis, 347–485 g·m−2); with increasing habitat depth, the abundance of both species decreased. The mean biomass of C. grayanus inhabiting hard bottom sediments at 10–20 m was quite high as well – 431–507 g·m−2. On soft bottom sediments, with a shift in depth from 10–15 to 15–20 m, its mean biomass decreased from (204 ± 33) to (27 ± 11) g·m−2. The mean biomass of M. kurilensis inhabiting both types of bottom sediments at 10–15 m was 121–194 g·m−2, and at 15–20 m, the value was 11–60 g·m−2.
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spelling doaj.art-af2199748ce047a1bc8b61ac7a2060f82024-03-26T13:36:32ZengA. O. Kovalevsky Institute of Biology of the Southern Seas of RASМорской биологический журнал2499-97682499-97762023-03-018110.21072/mbj.2023.08.1.07Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)L. G. Sedova0D. A. Sokolenko1Pacific branch of “VNIRO” (“TINRO”), Vladivostok, Russian FederationPacific branch of “VNIRO” (“TINRO”), Vladivostok, Russian Federation The bivalves of the family Mytilidae – Crenomytilus grayanus (Dunker, 1853) and Modiolus kurilensis Bernard, 1983 – are Pacific, Asian species and mass representatives of upper sublittoral epifauna in coastal waters of Peter the Great Bay (the Sea of Japan). C. grayanus is a traditional commercial species, and M. kurilensis is a promising one; resources of both molluscs are significant. The aim of the work is the comparative analysis of spatial distribution and biomass of C. grayanus and M. kurilensis on different types of bottom sediments and habitat depths in Peter the Great Bay. The investigation was carried out in 2007–2019 by scuba diving hydrobiological techniques at depths of down to 20 m. The data were analyzed for 5,911 stations; Mytilidae representatives were found at 1,635 stations. For mytilids, vital mass of each individual was determined, and mean biomass was estimated. The landscape diversity of Peter the Great Bay bottom determines an almost ubiquitous distribution of C. grayanus and M. kurilensis, and this reflects good adaptation of molluscs to conditions typical for this part of their area. Monospecific aggregations of C. grayanus prevailed both on hard and soft bottom sediments (78.6 and 38.2% of total stations with Mytilidae, respectively), while mixed aggregations of both species prevailed on soft bottom sediments (38.3%). On soft bottom sediments, monospecific aggregations of M. kurilensis were more common (23.5%) than on hard ones (8.1%). In Peter the Great Bay, mean biomass of C. grayanus on hard bottom sediments was (728 ± 47) g·m−2 varying from 524 g·m−2 (the Amur Bay) to 922 g·m−2 (eastern Peter the Great Bay). The value for mean biomass of C. grayanus on soft bottom sediments was (491 ± 51) g·m−2 varying from 228 g·m−2 (the Ussuri Bay) to 829 g·m−2 (the Amur Bay), except for southwestern Peter the Great Bay and Boisman Bay, where the value was below 50 g·m−2. Mean biomass of M. kurilensis on hard bottom sediments was (370 ± 74) g·m−2 varying from 18 g·m−2 (Baklan Bay) to 656 g·m−2 (the Empress Eugénie Archipelago water areas). The value for mean biomass of M. kurilensis on soft bottom sediments was (335 ± 37) g·m−2 varying from 77 g·m−2 (southwestern Peter the Great Bay) to 456 g·m−2 (the Amur Bay), except for Boisman and Baklan bays where the species was rare. In Peter the Great Bay, maximum values of the mean biomass for both species were recorded at depths of 1–10 m (C. grayanus, 664–805 g·m−2; M. kurilensis, 347–485 g·m−2); with increasing habitat depth, the abundance of both species decreased. The mean biomass of C. grayanus inhabiting hard bottom sediments at 10–20 m was quite high as well – 431–507 g·m−2. On soft bottom sediments, with a shift in depth from 10–15 to 15–20 m, its mean biomass decreased from (204 ± 33) to (27 ± 11) g·m−2. The mean biomass of M. kurilensis inhabiting both types of bottom sediments at 10–15 m was 121–194 g·m−2, and at 15–20 m, the value was 11–60 g·m−2. https://marine-biology.ru/mbj/article/view/373mytilidsMytilidaeGray musselCrenomytilus grayanushorsemusselModiolus kurilensis
spellingShingle L. G. Sedova
D. A. Sokolenko
Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)
Морской биологический журнал
mytilids
Mytilidae
Gray mussel
Crenomytilus grayanus
horsemussel
Modiolus kurilensis
title Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)
title_full Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)
title_fullStr Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)
title_full_unstemmed Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)
title_short Features of spatial distribution of Crenomytilus grayanus and Modiolus kurilensis (Bivalvia, Mytilidae) in Peter the Great Bay (the Sea of Japan)
title_sort features of spatial distribution of crenomytilus grayanus and modiolus kurilensis bivalvia mytilidae in peter the great bay the sea of japan
topic mytilids
Mytilidae
Gray mussel
Crenomytilus grayanus
horsemussel
Modiolus kurilensis
url https://marine-biology.ru/mbj/article/view/373
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