干旱区生态环境知识资源中心(Arid): Thyroid-Mediated Metabolic Differences Underlie Ecological Specialization of Extremophile Salmonids in the Arctic Lake El'gygytgyn

Arid

DOI	10.3389/fevo.2021.715110
	Thyroid-Mediated Metabolic Differences Underlie Ecological Specialization of Extremophile Salmonids in the Arctic Lake El'gygytgyn
	Esin, Evgeny V.; Markevich, Grigorii N.; Zlenko, Dmitriy V.; Shkil, Fedor N.
通讯作者	Esin, EV (corresponding author), Russian Acad Sci, AN Severtsov Inst Ecol & Evolut, Moscow, Russia.
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
ISSN	2296-701X
出版年	2021
卷号	9
英文摘要	El'gygytgyn, the only ancient lake in the Arctic (3.6 MY), is a deep (176 m) and extremely cold (always <= 4 degrees C) waterbody inhabited by unique salmonids, which colonized the ecosystem stepwise during the global fluctuations of the Quaternary climate. The descendant of the first-wave-invaders (long-finned charr) dwells in the deep waters and feeds on amphipods. The second-wave-invaders (smallmouth charr) consume copepods in the mid-waters. Recent third-wave-invaders (Boganida charr) are spread throughout the ecosystem and feed on insects when they are young shifting to piscivory at an older age. Here, we present the data on the charrs' thyroid status and metabolic characteristics, confirming their ecological specialization. The long-finned charr exhibits an extremely low thyroid content, the substitution of carbohydrates for lipids in the cellular respiration, an increased hemoglobin level and a high antioxidant blood capacity. These traits are likely to be the legacy of anaerobic survival under perennial ice cover during several Quaternary glaciations. Moderate thyroid status and reduced metabolic rate of the smallmouth charr, along with an inactive lifestyle, could be regarded as a specialization to saving energy under the low food supply in the water column. The piscivorous Boganida charr could be sub-divided into shallow-water and deep-water groups. The former demonstrates a significantly elevated thyroid status and increased metabolism. The latter is characterized by a reduced thyroid level, metabolic rate, and lipid accumulation. Thus, the endemic El'gygytgyn charrs represent a wide spectrum of contrast physiological adaptation patterns essential to survive in sympatry under extremely cold conditions.
英文关键词	metabolic phenotype evolutionary divergence thyroid status Arctic salmonids charrs
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000733726800001
WOS关键词	FISH ; TROUT ; SALVELINUS ; CHARR ; PERFORMANCE ; ADAPTATION ; DIVERGENCE ; HORMONES ; PROTEIN ; OASIS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373843
作者单位	[Esin, Evgeny V.; Zlenko, Dmitriy V.; Shkil, Fedor N.] Russian Acad Sci, AN Severtsov Inst Ecol & Evolut, Moscow, Russia; [Markevich, Grigorii N.] Kronotsky Nat Biosphere Reserve, Yelizovo, Russia; [Zlenko, Dmitriy V.] Lomonosov Moscow State Univ, Fac Biol, Moscow, Russia; [Shkil, Fedor N.] Russian Acad Sci, Koltzov Inst Dev Biol, Moscow, Russia
推荐引用方式 GB/T 7714	Esin, Evgeny V.,Markevich, Grigorii N.,Zlenko, Dmitriy V.,et al. Thyroid-Mediated Metabolic Differences Underlie Ecological Specialization of Extremophile Salmonids in the Arctic Lake El'gygytgyn[J],2021,9.
APA	Esin, Evgeny V.,Markevich, Grigorii N.,Zlenko, Dmitriy V.,&Shkil, Fedor N..(2021).Thyroid-Mediated Metabolic Differences Underlie Ecological Specialization of Extremophile Salmonids in the Arctic Lake El'gygytgyn.FRONTIERS IN ECOLOGY AND EVOLUTION,9.
MLA	Esin, Evgeny V.,et al."Thyroid-Mediated Metabolic Differences Underlie Ecological Specialization of Extremophile Salmonids in the Arctic Lake El'gygytgyn".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021).