The Effects of Water Temperature on the Timing of Spawning and Spat Settlement of the Yesso Scallop (Mizuhopecten yessoensis Jay, 1857) in Minonosok Cove (Posyet Bay, Peter the Great Bay, Sea of Japan)

2020 ◽  
Vol 46 (7) ◽  
pp. 580-589
Author(s):  
V. A. Luchin ◽  
N. I. Grigoryeva
Keyword(s):  
Water Temperature ◽  
Sea Of Japan ◽  
Peter The Great Bay ◽  
Mizuhopecten Yessoensis ◽  
Yesso Scallop ◽  
Peter The Great ◽  
Great Bay ◽  
Spat Settlement ◽  
Timing Of Spawning

scholarly journals EFFECTS OF THE WATER TEMPERATURE ON TIMING OF SPAWNING AND THE SPAT SETTLING FOR YESSO SCALLOP (MIZUHOPECTEN YESSOENSIS JAY, 1857) IN THE POSYET BAY (PETER THE GREAT BAY, JAPAN SEA)

2020 ◽  
Vol 200 ◽  
pp. 168-183
Author(s):  
V. A. Luchin ◽  
N. I. Grigoryeva
Keyword(s):  
Water Temperature ◽  
Peter The Great Bay ◽  
Patinopecten Yessoensis ◽  
Mizuhopecten Yessoensis ◽  
Spawning Period ◽  
Yesso Scallop ◽  
Peter The Great ◽  
Great Bay ◽  
Mean Temperature ◽  
Timing Of Spawning

The water temperature influence on timing of spawning and the spat settling is considered for yesso scallop (Mizuhopecten (=Patinopecten) yessoensis Jay, 1857) in the Minonosok Bay (Posyet Bay, Peter the Great Bay) on the data of observations in 1970–2011. The date of the spawning start varied from May 1 to June 9 (within 40 days) and the start of the scallop spat settling onto collectors of marine farm varied from June 4 to July 5 (within 32 days). Usually the spawning was delayed in the years with long cold season and big sum of daily temperatures below zero or low mean temperature in winter months and April, when the pre-spawning period with the temperature above zero before May 1 was too short. The spat settling was delayed in the years with severe winter or low mean temperature in the pre-spawning period (r = –0.46); the early settling was observed in the years with early warming above 0o C. The higher sum of positive daily temperatures accumulated till May 1 and till June 1, or within April and May, the earlier the spat settling on collectors (r = –0.58; –0.60; –0.55; –0.42, respectively). Prognostic equations for 10-day and 15-day forecasting of the dates of scallop spawning start and spat settling start are proposed and tested; accuracy of these forecasts is 70% for the spawning and 60 % for the spat settling.

scholarly journals Study of the phenological dates of the Yesso scallop (Mizuhopecten yessoensis Jay, 1857) spawning and settling onsets in Minonosok Inlet (Posiet Bay, Peter the Great Bay, East Sea/Sea of Japan)

2020 ◽  
Author(s):  
Н.И. ГРИГОРЬЕВА
Keyword(s):  
Sea Of Japan ◽  
Peter The Great Bay ◽  
East Sea ◽  
Patinopecten Yessoensis ◽  
Mizuhopecten Yessoensis ◽  
Yesso Scallop ◽  
Peter The Great ◽  
Great Bay ◽  
Phenological Dates

Проанализированы многолетние изменения фенодат начала нереста и оседания приморского гребешка (Mizuhopecten (=Patinopecten) yessoensis Jay, 1857) в бухте Миноносок (зал. Посьета, зал. Петра Великого, Японское море) в 1970–2011 гг. Выявлен сдвиг среднемноголетних сроков нереста и оседания на более ранние даты. Рассчитана энтропия процессов. The long-term changes of the phenological dates of the Yesso scallop (Mizuhopecten (=Patinopecten) yessoensis Jay, 1857) spawning and settling onsets in Minonosok Inlet (Posiet Bay, Peter the Great Bay, East Sea/Sea of Japan) were analyzed in 1970–2011. It was found that the long-term average spawning and settling periods were moved to earlier dates. The entropy of processes was calculated.

Fungal assemblages associated with commercial bivalve species in coastal waters of the Sea of Japan, Russia

2018 ◽  
Vol 61 (4) ◽  
pp. 355-363
Author(s):  
Oleg G. Borzykh ◽  
Lubov V. Zvereva
Keyword(s):  
Filamentous Fungi ◽  
Sea Of Japan ◽  
Coastal Waters ◽  
Pacific Oyster ◽  
Peter The Great Bay ◽  
The Sea Of Japan ◽  
Bivalve Species ◽  
Mizuhopecten Yessoensis ◽  
Yesso Scallop ◽  
Peter The Great

Abstract A mycological study of three major commercial bivalve species, Yesso scallop Mizuhopecten yessoensis, Pacific oyster Crassostrea gigas, and bay mussel Mytilus trossulus, from the coastal waters off Rikord Island (Peter the Great Bay, Sea of Japan) has been conducted. A total of 52 species of filamentous fungi from 19 genera of ascomycetes (and their anamorphic stages) and zygomycetes were isolated from shells and internal organs of the examined bivalves. Thirty-eight species (18 genera) of filamentous fungi were isolated from Yesso scallop, 21 species (eight genera) from Pacific oyster and 10 species (seven genera) from bay mussel. The studied bivalves showed a low degree of similarity in the diversity of the filamentous fungi. The identified filamentous fungi of the genera Aspergillus, Penicillium, Cladosporium, Chaetomium, etc. belong to a group of opportunistically pathogenic and toxigenic microorganisms that can cause mycoses and mycotoxicoses in aquatic animals.

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