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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Borovikova E. A., Kodukhova J. V., Semenova A. V.
Заглавие : 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
Место публикации : Contemp. Probl. Ecol.: Pleiades journals, 2020. - Vol. 13, Is. 6. - С. 620-630. - ISSN 19954255 (ISSN), DOI 10.1134/S1995425520060049
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.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Borovikova E. A., Kodukhova, J., V, Semenova, A., V
Заглавие : 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
Колич.характеристики :11 с
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [16-14-10001]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2020. - Vol. 13, Is. 6. - С. 620-630. - ISSN 1995-4255, DOI 10.1134/S1995425520060049. - ISSN 1995-4263(eISSN)
Примечания : Cited References:64. - This article was prepared with financial support from the Russian Science Foundation, grant no. 16-14-10001.
Предметные рубрики: SALMON SALMO-SALAR
SKULL MORPHOLOGY
ARCTIC CHARR
SEA
L.
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhrov A. A., Artamonova V. S.
Заглавие : Instability Stabilized: Mechanisms of Evolutionary Stasis and Genetic Diversity Accumulation in Fishes and Lampreys from Environments with Unstable Abiotic Factors
Колич.характеристики :12 с
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [16-14-10001]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2020. - Vol. 13, Is. 4. - С. 370-381. - ISSN 1995-4255, DOI 10.1134/S1995425520040083. - ISSN 1995-4263(eISSN)
Примечания : 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).
Предметные рубрики: SEBASTES-MENTELLA EVIDENCE
MTDNA CONTROL REGION
POPULATION-STRUCTURE
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Whiles M.R., Gladyshev M.I., Sushchik N.N., Makhutova O.N., Kalachova G.S., Peterson S.D., Regester K.J.
Заглавие : Fatty acid analyses reveal high degrees of omnivory and dietary plasticity in pond-dwelling tadpoles
Место публикации : Freshwater Biology. - 2010. - Vol. 55, Is. 7. - С. 1533-1547. - ISSN 00465070 (ISSN) , DOI 10.1111/j.1365-2427.2009.02364.x
Ключевые слова (''Своб.индексиров.''): 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.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhrov A. A., Artamonova V. S., Murza I. G., Pashkov A. N., Ponomareva M. V., Reshetnikov S. I., Christoforov O. L.
Заглавие : Ecological Forms of Black Sea Brown Trout (Salmo trutta labrax) in the Mzymta River as Manifestation of Ontogenetic Plasticity
Колич.характеристики :11 с
Коллективы : Russian Scientific Foundation [16-14-10001]
Место публикации : Russ. J. Dev. Biol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2018. - Vol. 49, Is. 2. - С. 117-127. - ISSN 1062-3604, DOI 10.1134/S1062360418020054. - ISSN 1608-3326(eISSN)
Примечания : Cited References:77. - This study was supported by the Russian Scientific Foundation, project no. 16-14-10001.
Предметные рубрики: ATLANTIC SALMON
POPULATIONS
HISTORY
L.
MIGRATION
SURVIVAL
Ключевые слова (''Своб.индексиров.''): 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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