THE KELP SPECIES OF WESTERN KAMCHATKA

2020 ◽  
pp. 37-53
Author(s):  
N.G. Klochkova ◽  
◽  
A.V. Klimova ◽  
T.A. Klochkova ◽  
◽  
...  
Keyword(s):  
Coastal Area ◽  
Sea Of Okhotsk ◽  
Age Groups ◽  
Point Of View ◽  
Saccharina Latissima ◽  
Morphometric Characteristics ◽  
Western Kamchatka ◽  
The Sea Of Okhotsk ◽  
Kelp Species ◽  
Alaria Esculenta

Western Kamchatka is still poorly studied in floristic and fishing aspects and there is no accurate understand-ing on the boundaries of different kelp species distribution in the area. During the 2020 field study in the coastal area located from Cape Ambon to the mouth of Utholok river, including the area proximate to Ptichiy Island, we found 5 kelp species, including Phyllariella ochotensis, Pseudolessonia laminarioides, Laminaria inclinatorhiza, Saccharina latissima, and Alaria esculenta sensu lato. The first 3 species are endemic to the mainland coast of the Sea of Okhotsk. A special search off the coast of southwestern Kamchatka for another Okhotsk endemic species, Laminaria appressirhiza, showed that it was absent. A representative of the Ber-ing Sea kelp flora Hedophyllum bongardianum does not occur on western Kamchatka north of 51°N. The morphometric characteristics of plants belonging to different age groups and morphological features typical for Western Kamchatka’s populations of these species are discussed. Additionally, the molecular phylogeny of L. appressirhiza and H. bongardianum collected from the Sea of Okhotsk are discussed. As shown, the first species belongs to the genus Laminaria. From a commercial point of view, this coastal area was estimated as unpromising for the organization of kelp collection by a traditional manual method.

CULTIVATION OF THE PACIFIC MUSSEL MYTILUS TROSSULUS (BIVALVIA: MYTILIDAE) IN MONO-AND POLYCULTURE IN THE NORTHERN PART OF THE SEA OF OKHOTSK

Fisheries ◽  
2020 ◽  
Vol 2020 (6) ◽  
pp. 108-110
Author(s):  
Viacheslav Zharnikov ◽  
Andrey Smirnov
Keyword(s):  
Growth Rate ◽  
Sea Of Okhotsk ◽  
Age Groups ◽  
Maximum Growth ◽  
Size Group ◽  
Mytilus Trossulus ◽  
The Sea Of Okhotsk ◽  
The Pacific ◽  
Size Groups ◽  
Mussel Mytilus Trossulus

The growth of various size groups of mussels in the Veselaya Bay of the tauyskaya Bay, grown in mono - and polyculture in suspended cages in the sea, was analyzed. The maximum growth was observed in mussels of the size group 10-20 mm at the age of 2 years. Shellfish grew more slowly at the age of 3-5 years. The growth rate of mollusks of all size groups in the polyculture was higher than in the monoculture. The percentage of elimination of mussels of all age groups in the polyculture was significantly lower. The forecast of growth of mussels of various size groups in poly - and monoculture in suspended cages in the first, second and third growth seasons in Veselaya Bay is made. The efficiency of cultivation of mussels in the Northern part of the sea of Okhotsk together with other edible mollusks: makoma and Miya is shown.

scholarly journals Evaluation of Wave-Ice Parameterization Models in WAVEWATCH III® Along the Coastal Area of the Sea of Okhotsk During Winter

2021 ◽  
Vol 8 ◽  
Author(s):  
Shinsuke Iwasaki ◽  
Junichi Otsuka
Keyword(s):  
Sea Ice ◽  
Correlation Coefficient ◽  
Coastal Area ◽  
Empirical Formula ◽  
Sea Of Okhotsk ◽  
Open Ocean ◽  
Wave Fields ◽  
Wavewatch Iii ◽  
The Sea Of Okhotsk ◽  
The Impact

Ocean surface waves tend to be attenuated by interaction with sea ice. In this study, six sea ice models in the third-generation wave model WAVEWATCH III® (WW3) were used to estimate wave fields over the Sea of Okhotsk (SO). The significant wave height (Hs) and mean wave period (Tm) derived from the models were evaluated with open ocean and ice-covered conditions, using SO coastal area buoy observations. The models were validated for a period of 3 years, 2008–2010. Additionally, the impact of sea ice on wave fields was demonstrated by model experiments with and without sea ice. In the open ocean condition, the root-mean square error (RMSE) and correlation coefficient for hourly Hs are 0.3 m and 0.92, and for hourly Tm 0.97 s and 0.8. In contrast, for the ice-covered condition, the averaged RMSE and correlation coefficient from all models are 0.44 m (1.6 s) and 0.8 (0.6) for Hs (Tm), respectively. Therefore, except for the bias, the accuracy of model results for the ice-covered condition is lower than for the open water condition. However, there is a significant difference between the six sea ice models. For Hs, the empirical formula whereby attenuation depends on the frequency relatively agrees with the buoy observation. For Tm, the empirical formula that is a function of Hs is better than those of other simulations. In addition, the simulations with sea ice drastically improved the wave field bias in coastal areas compared to the simulations without sea ice. Moreover, sea ice changed the monthly Hs (Tm) by more than 1 m (3 s) in the northwestern part of the SO, which has a high ice concentration.

Fatkullina imitata n. sp., second species of a unique cheilostome bryozoan genus with reversed-polarity zooidal budding, and new family Fatkullinidae

Zootaxa ◽  
2018 ◽  
Vol 4508 (1) ◽  
pp. 68 ◽  
Author(s):  
ANDREI V. GRISCHENKO ◽  
DENNIS P. GORDON ◽  
TARAS B. MOROZOV
Keyword(s):  
Sea Of Okhotsk ◽  
Type Species ◽  
Western Kamchatka ◽  
The Sea Of Okhotsk ◽  
New Family ◽  
Reversed Polarity ◽  
Western Kamchatka Shelf ◽  
Upper Slope

A second species of the unique cheilostome bryozoan genus Fatkullina, with reversed-polarity zooidal budding, has been discovered. Fatkullina imitata n. sp. is described from the western Kamchatka shelf and upper slope of the Sea of Okhotsk. It differs from the type species, F. paradoxa, by the combination of orificial characters, the convex distal third of the frontal shield, and predominantly crimson coloration of dry colonies. A new family, Fatkullinidae, is erected to accommodate Fatkullina (as the type genus) and also Stomacrustula, Pachyegis and Lepralioides. The origin of reversed polarity zooidal budding is considered to arise as a consequence of the unique T-shaped geometry of the ancestrula and transverse daughter zooid followed by spiral budding of periancestrular and succeeding generations of zooids within the zone of astogenetic change. 

Sign in / Sign up

Export Citation Format

Share Document