scholarly journals FIRST EXPERIENCE OF CAGE CULTIVATION OF HATCHERY-PRODUCED JUVENILE SCALLOP MIZUHOPECTEN YESSOENSIS AT EASTERN COAST OF PRIMORYE

2019 ◽  
Vol 197 ◽  
pp. 208-218
Author(s):  
S. G. Gavrilova ◽  
I. Yu. Sukhin ◽  
I. S. Turabzhanova
Keyword(s):  
Growth Rate ◽  
Soft Tissues ◽  
Peter The Great Bay ◽  
Eastern Coast ◽  
Southern Primorye ◽  
Mizuhopecten Yessoensis ◽  
Juvenile Scallop ◽  
Yesso Scallop ◽  
Aniva Bay ◽  
Scallop Cultivation

Yesso scallop Mizuhopecten yessoensis is the main object of aquaculture in Primorye with annual yield measured in hundreds ton. However, further development of its farming could be restricted by lack of the spat. Availability of the spat imported from China using for the scallop cultivation at the coast of Primorye is explored. The spat from Chinese hatchery located in Shandong province was supplied for one aquaculture company in Primorye in the volume of 660 . 106 ind. in 2018 and settled to hanging collectors (1000 ind. per bag), then to cages in the marine farm located north-eastward from the Moryak-Rybolov Bay. Survival and growth rate of the scallop juveniles were examined in early November 2018, when the water temperature was from 10.3–10.4 оС at the sea surface to 9.7–9.9 оС at the bottom, salinity was about 33.60 psu in the whole water column, chlorophyll a concentration varied in the range 0.4–0.8 mg/L with the maximum in the layer 8–24 m. The spat mortality during transportation was estimated as 15 %, but it increased to 56–90 % during its growing up in cages. This level of mortality is much higher than mortality of the spat collected from the coastal waters at southern Primorye. The highest mortality of artificial spat was observed for large-sized mollusks, whereas it was satisfactory for the small-sized ones. Possible reason of high mortality is too high density of juveniles and damaging of their soft tissues by other shells. The spat shells height did not exceed 5–10 mm in the collectors but increased during their growing in cages to 20–25 mm. This size is similar to the size of scallop growing from natural spat in southern Primorye. However, growth rate of the scallop growing at the Moryak-Rybolov Bay (2.0–2.7 mm/month) is lower than in Peter the Great Bay (3.0–3.5 mm/month) though higher than in the Vladimir Bay and Aniva Bay. Mean body weight of the cultivated scallop in November was 1.5 ± 0.1 g.

scholarly journals Study on the growth rates of mollusks in hanging culture in Possjet Bay (Sea of Japan)

2020 ◽  
Vol 24 (1/2) ◽  
pp. 67-81
Author(s):  
Nina I. Grigoryeva
Keyword(s):  
Growth Rate ◽  
Sea Of Japan ◽  
Growth Rates ◽  
Crassostrea Gigas ◽  
Blue Mussel ◽  
Peter The Great Bay ◽  
Mytilus Trossulus ◽  
Mizuhopecten Yessoensis ◽  
Yesso Scallop ◽  
Mussel Mytilus Trossulus

Исследована скорость роста культивируемых моллюсков подвесного выращивания в зал. Посьета (зал. Петра Великого, Японское море) за 1970–2011 гг. Приведены ростовые характеристики приморского гребешка (Mizuhopecten yessoensis (Jay, 1857)), тихоокеанской мидии (Mytilus trossulus Gould, 1850) и тихоокеанской (гигантской) устрицы (Crassostrea gigas (Thunberg, 1793)) в течение первых трех лет развития. Методами энтропийного анализа исследованы сроки достижения личинками и спатом определенных размеров. Выявлены временные интервалы и рассчитана вероятность наступления этих сроков. Обсуждается влияние техники культивирования на скорость роста. Ключевые слова: скорость роста, личинки, спат, приморский гребешок Mizuhopecten yessoensis, тихоокеанская мидия Mytilus trossulus, тихоокеанская устрица Crassostrea gigas, залив Посьета, Японское море. The growth rates of cultivated mollusks were studied in Possjet Bay (Peter the Great Bay, Sea of Japan) during 1970–2011. The growth characteristics were presented for the Yesso scallop (Mizuhopecten yessoensis (Jay, 1857)), the blue mussel (Mytilus trossulus Gould, 1850), and the Pacific (giant) oyster (Crassostrea gigas (Thunberg, 1793)) during the first three years of life. The average amount of time of the larvae and spat reaching certain sizes was determined using the method of entropy analysis. The time intervals were identified and the probability of these intervals to happen were also calculated. The influence of the cultivation techniques on the growth rate is discussed. Key words: growth rate, larvae, spat, Yesso scallop Mizuhopecten yessoensis, blue mussel Mytilus trossulus, Pacific oyster Crassostrea gigas, Possjet Bay, Sea of Japan.

scholarly journals Growth and survival of the hatchery larvae of pacific oyster Crassostrea gigas under different concentrations of microalgae and salinity in conditions of southern Primorye

2021 ◽  
Vol 201 (3) ◽  
pp. 723-734
Author(s):  
A. S. Tabelskaya ◽  
M. V. Kalinina
Keyword(s):  
Growth Rate ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Survival Rates ◽  
Peter The Great Bay ◽  
Japan Sea ◽  
Southern Primorye ◽  
Chaetoceros Muelleri ◽  
Growth And Survival ◽  
Significant Difference

Growth and survival rates for larvae of pacific oyster Crassostrea gigas (Thunberg, 1793) hatched in artificial conditions are estimated for the stages of development from D-veliger to pediveliger. The experiment was conducted in the Mariculture Center located on Popov Island (Peter the Great Bay, Japan Sea) for 2 regimes of feeding and water salinity of 26 and 32 ppt. Microalgae Isochrysis galbana, Chaetoceros muelleri and Phaeodactylum tricornutum cultivated in the Mariculture Center were used as a feed in both regimes, in different concentrations. The maximum concentration was 4-fold higher than the minimum one: daily doses of food were 20 and 5 thousand cells/mL for veligers, 40 and 10 thousand cells/mL for early veliconkhes, and 80 and 20 thousand cells/mL for late veliconkhes, respectively, whereas 80 thousand cells/mL for all larvae in transition to pediveliger stage. Statistically significant difference of the growth rate was found for cases with different food concentration (p < 0.05). The larvae with better feeding had higher growth rate under salinity of both 26 and 32 ppt. Besides, the lowered salinity (26 ppt) had some positive effect for growth in the regime of better feeding. Survival rate of the larvae from D-veliger to pediveliger was high under all regimes of the experiment and was estimated for the minimal diet as 77.4 and 64.7 % under salinity of 26 and 32 ppt, respectively, and for the maximum diet as 81.2 and 80.7 % under salinity of 26 and 32 ppt, respectively. According to the experiment results, deficit of food at early stages of the oyster larval development affects negatively on their growth but does not have significant impact on their survival.

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.

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 DISTRIBUTION AND RESOURCES OF YESSO SCALLOP MIZUHOPECTEN YESSOENSIS IN THE SAKHALINKURIL REGION ON RESULTS OF THEIR EXPLOITATION FROM 2000 TO 2011

2019 ◽  
Vol 198 ◽  
pp. 46-60
Author(s):  
D. A. Galanin ◽  
N. Yu. Prokhorova ◽  
V. A. Sergeenko ◽  
Yu. S. Chernyshova ◽  
T. A. Shpakova
Keyword(s):  
Spatial Distribution ◽  
Kuril Islands ◽  
Period Range ◽  
Mizuhopecten Yessoensis ◽  
Commercial Exploitation ◽  
Yesso Scallop ◽  
Aniva Bay ◽  
Archived Data

Results of commercial exploitation of the yesso scallop resources in the Sakhalin-Kuril region in 2000–2011 are analyzed, taking into account the data of diving surveys at the depth of 2–30 m (on average 5 stations with sampling from 50 m2 per transect) in the 2009–2012. The results are compared with published and archived data for unexploited period. Range of the scallop spatial distribution did not changed. Size of the scallop increased, but its abundance and biomass decreased, in general, in particular in the Aniva Bay and on the shoal at southern Kuril Islands, though the scallop became more abundant in the Aleksandrovsky Bay and Patience Bay. The stocks reducing in the Aniva Bay was possibly caused by lack of feeding.

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.

scholarly journals Dynamics of stock for yesso scallop Mizuhopecten yessoensis (Jay, 1856) in the northwestern Tatar Strait from the beginning of its fishery to nowadays

2021 ◽  
Vol 201 (3) ◽  
pp. 533-546
Author(s):  
P. A. Dulenina ◽  
A. A. Dulenin
Keyword(s):  
Shell Height ◽  
Mizuhopecten Yessoensis ◽  
Tatar Strait ◽  
Yesso Scallop ◽  
The Mean ◽  
Commercial Value ◽  
Northwestern Tatar Strait ◽  
Commercial Stock

Settlements of yesso scallop Mizuhopecten yessoensis in the northwestern Tatar Strait (within the waters of Khabarovsk Region) are considered on the data of scuba (< 20 m depth) and dredge (> 20 m depth) surveys conducted in 2001–2018. To 2018, only two settlements remain in this area from 9–12 ones in 2010–2014; both remained settlements have no commercial value. Trend to decreasing of the settlements density is shown: the mean density was 3.0 ind./m2 in 2001, 0.20 ind./m2 in 2010, and 0.0005 ind./m2 in 2018. Commercially valuable scallops with the shell height > 120 mm prevailed in the settlements (86–100 %), whereas juveniles were rare or absent (1.6 %, on average) in all years of surveys. CPUE decreased from 200 kg/diver/hour in 2001–2003 to 10 kg/diver/hour in 2018. These changes are obviously reasoned by overexploitation of the population using dredging and scuba gathering. Total commercial stock of yesso scallop dropped to the minimal value in 2018: 200 t, that was in 4.5 times lower than the established limit. Thus, 5 years ban is established for M. yessoensis landing in the area.

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