Molecular diet analysis of the marine fish-eating bat (Myotis vivesi) and potential mercury exposure

被引:3
|
作者
Drinkwater, Rosie [1 ]
Goodwin, Alice [1 ]
Cush, Jake [1 ]
Korstian, Jennifer M. [2 ]
Chumchal, Matthew M. [2 ]
Gerardo Herrera, L. M. [3 ]
Valdez, Martha [4 ]
Otalora-Ardila, Aida [5 ,6 ]
Juan Flores-Martinez, Jose [7 ]
Clare, Elizabeth L. [1 ,8 ]
机构
[1] Queen Mary Univ London, Sch Biol & Chem Sci, Mile End Rd, London E1 4NS, England
[2] Texas Christian Univ, Dept Biol, 2800 South Univ Dr, Ft Worth, TX 76109 USA
[3] Univ Nacl Autonoma Mexico, Inst Biol, Estn Biol Chamela, San Patricio 48980, Jalisco, Mexico
[4] Colegio Frontera Sur, Dept Ecol & Sistemat Acuat, Chetmal 77014, Quintana Roo, Mexico
[5] Univ Nacl Autonoma Mexico, Inst Biol, Posgrad Ciencias Biol, Circuito Exterior S-N,Ciudad Univ, Ciudad De Mexico 04510, Mexico
[6] Univ Nacl Colombia, Grp Conservac & Manejo Vida Silvestre, Bogota, Colombia
[7] Univ Nacl Autonoma Mexico, Inst Biol, Lab Sistemas Informac Geog, Ciudad De Mexico 04510, Mexico
[8] York Univ, Dept Biol, Toronto, ON M3J 1P3, Canada
关键词
biomagnification; DNA barcoding; diet analysis; mercury exposure; trophic transfer; Myotis vivesi; fish-eating bat; METHYL MERCURY; PREY DNA; EXCRETION; IDENTIFICATION; ACCUMULATION; PREDATOR; BARCODE; MAMMALS; WATER; PCR;
D O I
10.1139/cjz-2021-0018
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Mercury is a toxic element acquired by animals through feeding which can accumulate within food chains through biomagnification. This possesses particular risks to higher trophic levels and may unduly impact marine foraging species or individuals. The fish-eating bat (Myotis vivesi Menegaux, 1901) inhabits islands in the Gulf of California and can act as a predator in the marine environment. A predominantly marine diet and a high trophic position increase the risk of mercury exposure owing to increased bioaccumulation. Using molecular techniques to reconstruct diet, we show that M. vivesi regularly feeds on small fishes and crustaceans, particularly on the Californian anchovy (Engraulis mordax Girard, 1854) and a krill species (Nyctiphanes simplex Hansen, 1911). Additionally, we identify significant interannual variation in diet composition within this population, but measured levels of total mercury in faecal samples were not related to dietary diversity or trophic level.
引用
收藏
页码:752 / 759
页数:8
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