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Fatty acid analyses reveal high degrees of omnivory and dietary plasticity in pond-dwelling tadpoles / M. R. Whiles [et al.] // Freshwater Biology. - 2010. - Vol. 55, Is. 7. - P1533-1547, DOI 10.1111/j.1365-2427.2009.02364.x . - ISSN 0046-5070
Кл.слова (ненормированные):
Anura -- Diet -- Food web -- Foraging -- Gut contents -- Omnivory -- Selective feeding -- Amphibia -- Anura -- Bacteria (microorganisms) -- Hexapoda -- Lithobates -- Pseudacris crucifer
Аннотация: 1. Understanding the trophic relationships of consumers is central to ecology, but constructing meaningful food webs is often difficult because of a lack of detailed information on consumption versus assimilation and high degrees of omnivory.2. We used fatty acid analyses to examine the trophic relationships of three common larval anurans (Pseudacris crucifer, Lithobates catesbeianus and Lithobates clamitans) that are often classified as grazers or detritivores. Tadpoles and potential food sources were sampled in four ponds in southern Illinois and analysed for fatty acid composition. Single linkage cluster analysis was then used to compare fatty acid profiles among tadpole gut contents, tadpole muscle tissues and available food resources.3. Diets varied among species and within species among ponds, but organic sediments consistently contributed most to the fatty acid composition of the gut contents of all species. Fatty acid profiles also indicated that larval insects and phytoplankton were consumed by both L. catesbeianus and L. clamitans in one pond, while L. clamitans and P. crucifer consumed mainly periphyton along with sediments in another pond, and these diet differences appeared linked to physical differences among ponds, with periphyton and/or phytoplankton contributing more to tadpole diets in less shaded ponds.4. The fatty acid composition of muscle tissues of L. clamitans, the dominant tadpole in these systems, indicated that plant detritus and bacteria, which were the dominant components of organic sediments in the ponds, were common components of the assimilatory diet.5. Results demonstrate the utility of fatty acid analyses for assessing both consumption and assimilation. The tadpole assemblages we examined derive much of their energy from heterotrophic and allochthonous sources and exhibit high dietary plasticity. This information will allow for more accurate and comprehensive assessments of trophic interactions in freshwater habitats, as well as aid in amphibian conservation, management and captive propagation efforts. В© 2009 Blackwell Publishing Ltd.

Scopus
Держатели документа:
Department of Zoology, Center for Ecology, Illinois Fisheries and Aquaculture Center, Southern Illinois University, Carbondale, IL, United States
Institute of Biophysics of Siberian Branch of the Russian Academy of Science, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, Russian Federation
Department of Biology, Clarion University of Pennsylvania, Clarion, PA, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Whiles, M.R.; Gladyshev, M.I.; Sushchik, N.N.; Makhutova, O.N.; Kalachova, G.S.; Peterson, S.D.; Regester, K.J.

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Ecological Forms of Black Sea Brown Trout (Salmo trutta labrax) in the Mzymta River as Manifestation of Ontogenetic Plasticity / A. A. Makhrov [et al.] // Russ. J. Dev. Biol. - 2018. - Vol. 49, Is. 2. - P117-127, DOI 10.1134/S1062360418020054. - Cited References:77. - This study was supported by the Russian Scientific Foundation, project no. 16-14-10001. . - ISSN 1062-3604. - ISSN 1608-3326

РУБ Developmental Biology
Рубрики:
ATLANTIC SALMON
   POPULATIONS
   HISTORY
   L.
   MIGRATION
   SURVIVAL
Кл.слова (ненормированные):
Salmonidae -- brown trout -- trout -- ontogenesis -- migrations -- maturation -- phenotypic plasticity -- gonads -- smolts
Аннотация: Populations of brown trout in the Mzymta River and its tributaries include anadromous (mainly female) and resident (mainly males) fish. Some resident males in the basin of the Mzymty River attain sexual maturity at the age 1+, and resident females mature at the age 2+ or 3+. The maximum age of resident fish is 4+ in the samples studied. Migrations of anadromous brown trout to the sea occur at the ages 1+, 2+, or 3+. Future spawners spend from 1 to 4 years at feeding grounds in the sea. Smolts of the population are characterized by performing not only spring but also autumn migrations to the sea. One smolt specimen has been detected upstream from the dam in the river where spawners of anadromous brown trout do not migrate; this means that the capability for sea migrations persists long in the population represented only by resident specimens of brown trout. The diversity of life cycles and ecological forms in populations of brown trout is not lower than in populations of brown trout in Northern and Western Europe. The comparison of the data obtained with published data makes it possible to come to the conclusion about the high plasticity of ontogenesis of Black Sea brown trout.

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Держатели документа:
Russian Acad Sci, Severtsov Inst Ecol & Evolut, Moscow 119071, Russia.
Russian Acad Sci, Fed Res Ctr Krasnoyarsk Sci Ctr, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
St Petersburg State Univ, St Petersburg 199034, Russia.
Azov Res Inst Fisheries, Krasnodar Branch, Krasnodar 350000, Russia.
Moscow MV Lomonosov State Univ, Moscow 119991, Russia.
Kuban State Univ, Krasnodar 350040, Russia.

Доп.точки доступа:
Makhrov, A. A.; Artamonova, V. S.; Murza, I. G.; Pashkov, A. N.; Ponomareva, M. V.; Reshetnikov, S. I.; Christoforov, O. L.; Russian Scientific Foundation [16-14-10001]

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Instability Stabilized: Mechanisms of Evolutionary Stasis and Genetic Diversity Accumulation in Fishes and Lampreys from Environments with Unstable Abiotic Factors / A. A. Makhrov, V. S. Artamonova // Contemp. Probl. Ecol. - 2020. - Vol. 13, Is. 4. - P370-381, DOI 10.1134/S1995425520040083. - Cited References:141. - We are grateful to Yu.P. Altukhov, I.N. Bolotov, E.A. Borovikova, I.V. Vikhrev, Yu.Yu. Dgebuadze, E.Yu. Krysanov, K.V. Kuzishchin, B.M. Mednikov, M.V. Mina, V.M. Spitsyn, and V.S. Fridman for helpful discussions of the problems considered in the review. The work was supported by the Russian Science Foundation (project no. 16-14-10001). . - ISSN 1995-4255. - ISSN 1995-4263

РУБ Ecology
Рубрики:
SEBASTES-MENTELLA EVIDENCE
MTDNA CONTROL REGION
POPULATION-STRUCTURE
Кл.слова (ненормированные):
ecology -- evolution -- phenotypic plasticity -- heterozygosity -- heteroplasmy -- mobilization reserve -- Arctic -- mountains
Аннотация: As studies have shown, individuals from well morphologically distinct groups often represent the same species and may even belong to one population in fishes and lampreys from environments with unstable abiotic factors (Arctic, mountain, and desert regions). Phenotypic plasticity ensures broad variation ranges of morphological traits in unstable conditions, which require rapid transitions from one morphogenetic variant to another. The choice of a morphogenetic pathway can be influenced by the level of individual heterozygosity, changes in the copy numbers of certain DNA sequences, heteroplasmy, and the presence of several allelic variants in the genes that strongly affect the phenotype. A cyclic character is often observed for evolutionary processes driven by these mechanisms, and speciation usually does not take place in unstable environmental conditions. However, mobilization reserve accumulate in a species with a broad reaction norm, and particular morphogenetic pathways may be genetically fixed when its population finds its way into stable environmental conditions, facilitating fast allopatric speciation.

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Держатели документа:
Russian Acad Sci, Severtsov Inst Ecol & Evolut, Moscow 119071, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Fed Res Ctr, Inst Biophys,Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Makhrov, A. A.; Artamonova, V. S.; Russian Science FoundationRussian Science Foundation (RSF) [16-14-10001]

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Phenotypic Plasticity and Allometry of Craniological Characters of Anadromous and Lacustrine Forms of Whitefish Coregonus lavaretus (Linnaeus, 1758) as an Indication of the Wrong Species Status of Coregonus pidschian / E. A. Borovikova, J. V. Kodukhova, A. V. Semenova // Contemp. Probl. Ecol. - 2020. - Vol. 13, Is. 6. - P620-630, DOI 10.1134/S1995425520060049 . - ISSN 1995-4255
Кл.слова (ненормированные):
allometry -- anadromous form -- coregonid fish -- craniological features -- lacustrine form -- plasticity -- species status -- allometry -- cranium -- environmental conditions -- lacustrine environment -- phenotypic plasticity -- salmonid -- taxonomy -- Arctic Ocean -- White Sea -- Coregonus lavaretus -- Coregonus pidschian
Аннотация: Abstract—: The variability of craniological characters has been studied for anadromous and lacustrine forms of whitefish Coregonus lavaretus (Linnaeus, 1758) from waterbodies of the Karelian coast of the White Sea. The significant phenotypic plasticity of craniological characters of the whitefish depends on the environmental conditions. Moreover, there is a correlation between indexes of the craniological traits (except for the index of the snout length) and the body and/or head length (allometric effect). These results suggest that it is unreasonable to separate anadromous and lacustrine forms of C. lavaretus as distinct taxonomical units and argues for the invalidity of C. pidschian and C. oxyrinchus species. © 2020, Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl oblast 152742, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation
Faculty of Biology, Moscow State University, Moscow, 119234, Russian Federation

Доп.точки доступа:
Borovikova, E. A.; Kodukhova, J. V.; Semenova, A. V.

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РУБ Ecology
Рубрики:
SALMON SALMO-SALAR
   SKULL MORPHOLOGY
   ARCTIC CHARR
   SEA
   L.
Кл.слова (ненормированные):
coregonid fish -- craniological features -- anadromous form -- lacustrine -- form -- plasticity -- allometry -- species status
Аннотация: The variability of craniological characters has been studied for anadromous and lacustrine forms of whitefish Coregonus lavaretus (Linnaeus, 1758) from waterbodies of the Karelian coast of the White Sea. The significant phenotypic plasticity of craniological characters of the whitefish depends on the environmental conditions. Moreover, there is a correlation between indexes of the craniological traits (except for the index of the snout length) and the body and/or head length (allometric effect). These results suggest that it is unreasonable to separate anadromous and lacustrine forms of C. lavaretus as distinct taxonomical units and argues for the invalidity of C. pidschian and C. oxyrinchus species.

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Держатели документа:
Russian Acad Sci, Papanin Inst Biol Inland Waters, Borok 152742, Yaroslavl Oblas, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Akad Gorodok 50-50, Krasnoyarsk 660036, Russia.
Moscow MV Lomonosov State Univ, Fac Biol, Moscow 119234, Russia.

Доп.точки доступа:
Borovikova, E. A.; Kodukhova, J., V; Semenova, A., V; Russian Science FoundationRussian Science Foundation (RSF) [16-14-10001]

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