scholarly journals Modulation of thermal noise and spectral sensitivity in Lake Baikal cottoid fish rhodopsins

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Hoi Ling Luk ◽  
Nihar Bhattacharyya ◽  
Fabio Montisci ◽  
James M. Morrow ◽  
Federico Melaccio ◽  
...  
Keyword(s):  
Spectral Sensitivity ◽  
Lake Baikal ◽  
Thermal Noise ◽  
Cottoid Fish

Molecular Evolution of the Cottoid Fish Endemic to Lake Baikal Deduced from Nuclear DNA Evidence

1997 ◽  
Vol 8 (3) ◽  
pp. 415-422 ◽  
Author(s):  
David M Hunt ◽  
Jude Fitzgibbon ◽  
Sergey J Slobodyanyuk ◽  
James K Bowmaker ◽  
Kanwaljit S Dulai
Keyword(s):  
Molecular Evolution ◽  
Lake Baikal ◽  
Nuclear Dna ◽  
Dna Evidence ◽  
Cottoid Fish

Differentiation of communities of macroinvertebrates and cottoid fish associated with methane seeps of different bottom landscapes of Lake Baikal

2021 ◽  
Vol 325 (4) ◽  
pp. 469-484
Author(s):  
V.G. Sideleva ◽  
T.Ya. Sitnikova
Keyword(s):  
Lake Baikal ◽  
Deep Water ◽  
Gas Hydrates ◽  
Microbial Mats ◽  
Methane Seep ◽  
Methane Seeps ◽  
Saint Petersburg ◽  
Transitional State ◽  
Cottoid Fishes ◽  
Cottoid Fish

The paper presents the results of the study of communities of macroinvertebrates and cottoid fish inhabiting methane seeps of Lake Baikal. For the analysis, we used video surveillance and collection of animals carried out with the help of "Mir" deep-water submersible, as well as NIOZ-type box-corer samplers from the board of a research vessel. Posolskaya Bank and Saint Petersburg methane seeps are located in different basins (southern and middle) and at different depths (300–500 m and ~ 1400 m), characterized by the different underwater landscapes (slope of underwater upland and hills formed by gas hydrates), by the structure of gas hydrates and their depth location in sediments, as well as the composition of microbial mats and communities of microorganisms of bottom sediments. Both seeps are characterized by bubble discharge of methane gas and the formation of highly productive communities of large invertebrates and cottoid fish on seep habitats. Seep animal communities consisted of species-depleted invertebrates and fish of the surrounding deep-water benthal of the Lake. We showed the similarities and differences in the composition of the faunas of two seeps, as well as the quantitative characteristics of taxonomic groups of macroinvertebrates and cottoid fishes. Obligate species have not been revealed on the methane seep Posolskaya Bank. For the methane seep Saint Petersburg, the gastropod species Kobeltocochlea tamarae Sitnikova, Teterina et Maximova, 2021 (Caenogastropoda: Benedictiidae) was designated as an obligate species; among bottom cottoid fishes, Neocottus werestschagini (Taliev, 1953) (Cottoidei: Abyssocottidae) had possible a transitional state to obligate. We presented the data on the assimilation by seep animals of mixed photo- and chemosynthetic food with different proportions of methane-derived carbon. A hypothesis has been substantiated that deep-water seep areas could serve as refugium for the preservation of endemic fauna during the Pliocene-Pleistocene glaciations of Lake Baikal.

Visual pigments and the photic environment: The cottoid fish of Lake Baikal

1994 ◽  
Vol 34 (5) ◽  
pp. 591-605 ◽  
Author(s):  
J.K. Bowmaker ◽  
V.I. Govardovskii ◽  
S.A. Shukolyukov ◽  
J L.V. Zueva ◽  
D.M. Hunt ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Visual Pigments ◽  
Cottoid Fish

Spectral Tuning and Evolution of Short Wave-Sensitive Cone Pigments in Cottoid Fish from Lake Baikal†

Biochemistry ◽  
2002 ◽  
Vol 41 (19) ◽  
pp. 6019-6025 ◽  
Author(s):  
Jill A. Cowing ◽  
Subathra Poopalasundaram ◽  
Susan E. Wilkie ◽  
James K. Bowmaker ◽  
David M. Hunt
Keyword(s):  
Lake Baikal ◽  
Short Wave ◽  
Spectral Tuning ◽  
Cone Pigments ◽  
Cottoid Fish

scholarly journals Spectral tuning and molecular evolution of rod visual pigments in the species flock of cottoid fish in Lake Baikal

1996 ◽  
Vol 36 (9) ◽  
pp. 1217-1224 ◽  
Author(s):  
David M. Hunt ◽  
Jude Fitzgibbon ◽  
Sergey J. Slobodyanyuk ◽  
James K. Bowmakers
Keyword(s):  
Molecular Evolution ◽  
Lake Baikal ◽  
Visual Pigments ◽  
Species Flock ◽  
Spectral Tuning ◽  
Cottoid Fish

Ultra-spatially resolved synchrotron powered FT-IR microspectroscopy of individual cells of biological material

1995 ◽  
Vol 53 ◽  
pp. 884-885
Author(s):  
David L. Wetzel ◽  
John A. Reffner ◽  
Gwyn P. Williams
Keyword(s):  
Thermal Noise ◽  
Spot Size ◽  
Acquisition Time ◽  
Thermal Source ◽  
Signal To Noise ◽  
Spatially Resolved ◽  
Good Spatial Resolution ◽  
Small Spot ◽  
Ft Ir ◽  
Ir Microspectroscopy

Synchrotron radiation is 100 to 1000 times brighter than a thermal source such as a globar. It is not accompanied with thermal noise and it is highly directional and nondivergent. For these reasons, it is well suited for ultra-spatially resolved FT-IR microspectroscopy. In efforts to attain good spatial resolution in FT-IR microspectroscopy with a thermal source, a considerable fraction of the infrared beam focused onto the specimen is lost when projected remote apertures are used to achieve a small spot size. This is the case because of divergence in the beam from that source. Also the brightness is limited and it is necessary to compromise on the signal-to-noise or to expect a long acquisition time from coadding many scans. A synchrotron powered FT-IR Microspectrometer does not suffer from this effect. Since most of the unaperatured beam’s energy makes it through even a 12 × 12 μm aperture, that is a starting place for aperture dimension reduction.

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