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题名: Concentrations of osmotically related constituents in plasma and urine of finless porpoise (Neophocaena asiaeorientalis): implications for osmoregulatory strategies for marine mammals living in freshwater
作者: Guo, Aihuan1, 2; Hao, Yujiang1; Wang, Jingzhen1, 2; Zhao, Qingzhong1; Wang, Ding1
通讯作者: Hao, YJ (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, 7th South Donghu Rd, Wuhan 430072, Hubei, Peoples R China.
关键词: Finless porpoise ; Osmoregulation ; Plasma ; Urine
刊名: ZOOLOGICAL STUDIES
发表日期: 2014-02-01
DOI: 10.1186/1810-522X-53-10
卷: 53, 期:-
收录类别: SCI
文章类型: Article
部门归属: [Guo, Aihuan; Hao, Yujiang; Wang, Jingzhen; Zhao, Qingzhong; Wang, Ding] Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China; [Guo, Aihuan; Wang, Jingzhen] Univ Chinese Acad Sci, Beijing 100864, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: Knowledge Innovation Program of the Chinese Academy of Sciences [KSCX2-EW-Z-4]
类目[WOS]: Zoology
研究领域[WOS]: Zoology
摘要: Background: Most cetaceans inhabit the hyperosmotic marine environment with only a few species living in freshwater habitats. The Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis) is the only freshwater subspecies of the genus. Our aim was to study whether the osmoregulation mechanism of the Yangtze finless porpoise is different from the marine subspecies, the East Asian finless porpoise (Neophocaena asiaeorientalis sunameri). We assayed and compared the concentrations of the constituents involved in osmoregulation in the blood and urine in the Yangtze finless porpoise and the East Asian finless porpoise. We also compared the corresponding urine constituents of the porpoises with existing data on fin whales (Balaenoptera physalus) and bottlenose dolphins (Tursiops truncatus). Results: The mean plasma osmolality of Yangtze finless porpoise was significantly lower than that of the marine subspecies (P < 0.01). Similarly, the urine osmolality of Yangtze finless porpoise was also significantly lower than that of its marine counterpart (P < 0.05). However, the urine sodium concentration of freshwater finless porpoise was significantly lower than that in the marine subspecies (P < 0.01), even though their serum sodium has no significant difference. Moreover, the freshwater porpoise has significantly lower urine urea concentration but much higher serum urea than in the marine finless porpoise (P < 0.05). Conclusions: These results suggest that the freshwater finless porpoise does have different osmoregulatory mechanism from marine cetaceans. Conserving sodium by excreting urine with low ion levels may be an essential strategy to maintain the serum electrolyte balance for the freshwater subspecies that also appears to be more susceptible to hyponatremia.
英文摘要: Background: Most cetaceans inhabit the hyperosmotic marine environment with only a few species living in freshwater habitats. The Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis) is the only freshwater subspecies of the genus. Our aim was to study whether the osmoregulation mechanism of the Yangtze finless porpoise is different from the marine subspecies, the East Asian finless porpoise (Neophocaena asiaeorientalis sunameri). We assayed and compared the concentrations of the constituents involved in osmoregulation in the blood and urine in the Yangtze finless porpoise and the East Asian finless porpoise. We also compared the corresponding urine constituents of the porpoises with existing data on fin whales (Balaenoptera physalus) and bottlenose dolphins (Tursiops truncatus).
关键词[WOS]: DOLPHINS TURSIOPS-TRUNCATUS ; UREA TRANSPORTERS ; BLOOD-CHEMISTRY ; WHALES ; ELECTROLYTES ; CONSERVATION ; CETACEANS ; HORMONES ; BALANCE ; BALEEN
语种: 英语
WOS记录号: WOS:000332792200003
ISSN号: 1021-5506
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19998
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100864, Peoples R China
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