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DOI10.1093/conphys/cow047
Endocrine and metabolic impacts of warming aquatic habitats: differential responses between recently isolated populations of a eurythermal desert pupfish
Lema, Sean C.1; Chow, Michelle I.1,2; Resner, Emily J.1; Westman, Alex A.1; May, Darran2; Dittman, Andrew H.3; Hardy, Kristin M.1
通讯作者Lema, Sean C.
来源期刊CONSERVATION PHYSIOLOGY
ISSN2051-1434
出版年2016
卷号4
英文摘要

Temperatures of inland aquatic habitats are increasing with climate change, and understanding how fishes respond physiologically to thermal stress will be crucial for identifying species most susceptible to these changes. Desert fishes may be particularly vulnerable to rising temperatures because many species occupy only a fraction of their historical range and occur in habitats with already high temperatures. Here, we examined endocrine and metabolic responses to elevated temperature in Amargosa pupfish, Cyprinodon nevadensis amargosae. We studied C. n. amargosae from two habitats with distinct thermal conditions: the Amargosa River, which experiences diurnally and seasonally variable temperatures (0.2-40 degrees C); and Tecopa Bore, a spring and marsh fed by hot groundwater (47.5 degrees C) from an artesian borehole. These allopatric populations differ in morphology, and prior evidence suggests that temperature might contribute to these differences via altered thyroid hormone (TH) regulation of morphological development. Here, we document variation in hepatic iodothyronine deiodinase type 2 (dio2) and type 3 (dio3) and TH receptor beta (tr beta) gene transcript abundance between the Amargosa River and Tecopa Bore wild populations. Fish from these populations acclimated to 24 or 34 degrees C retained differences in hepatic dio2, dio3 and tr beta mRNAs and also varied in transcripts encoding the TH membrane transporters monocarboxylate transporter 8 (mct8) and organic anion-transporting protein 1c1 (oatp1c1). Tecopa Bore pupfish also exhibited higher dio2 and tr beta mRNA levels in skeletal muscle relative to Amargosa River fish. Muscle citrate synthase activity was lower at 34 degrees C for both populations, whereas lactate dehydrogenase activity and lactate dehydrogenase A-chain (ldhA) transcripts were both higher and 3,5,3’-triiodothryonine responsive in Tecopa Bore pupfish only. These findings reveal that local population variation and thermal experience interact to shape how pupfish respond to elevated temperatures, and point to the need to consider such interactions in management actions for desert fishes under a changing climate.


英文关键词Climate change fish lactate dehydrogenase metabolism temperature thyroid hormone
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000490955500016
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences ; Physiology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology ; Physiology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192162
作者单位1.Calif Polytech State Univ San Luis Obispo, Ctr Coastal Marine Sci, Biol Sci Dept, San Luis Obispo, CA 93407 USA;
2.Univ Washington, Sch Aquat & Fishery Sci, Seattle, WA 98105 USA;
3.NOAA, Natl Marine Fisheries Serv, Northwest Fisheries Sci Ctr, Environm & Fisheries Sci Div, Seattle, WA 98112 USA
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GB/T 7714
Lema, Sean C.,Chow, Michelle I.,Resner, Emily J.,et al. Endocrine and metabolic impacts of warming aquatic habitats: differential responses between recently isolated populations of a eurythermal desert pupfish[J],2016,4.
APA Lema, Sean C..,Chow, Michelle I..,Resner, Emily J..,Westman, Alex A..,May, Darran.,...&Hardy, Kristin M..(2016).Endocrine and metabolic impacts of warming aquatic habitats: differential responses between recently isolated populations of a eurythermal desert pupfish.CONSERVATION PHYSIOLOGY,4.
MLA Lema, Sean C.,et al."Endocrine and metabolic impacts of warming aquatic habitats: differential responses between recently isolated populations of a eurythermal desert pupfish".CONSERVATION PHYSIOLOGY 4(2016).
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