Mercury bioaccumulation and isotopic relation between Trichiurus lepturus (Teleostei) and its preferred prey in coastal waters of southeastern Brazil.
An Acad Bras Cienc
; 88(2): 801-7, 2016 May 31.
Article
en En
| MEDLINE
| ID: mdl-27254456
ABSTRACT
The trophic transfer of total mercury (THg) and its bioaccumulation from prey species to the predator fish Trichiurus lepturus was analysed in coastal waters of southeastern Brazil to evaluate the trace element dynamic in this predator-prey system. The isotopic (δ13C and δ15N) relation between this predator and its prey allowed inferences on prey assimilation and predator feeding habits. The THg increment varied from 4.5 to 19.5 times between prey and predator, with a biomagnification power of 0.59. The prey species could be divided into three groups regarding δ15N values i) 13.6 to 13.2 (juvenile conspecifics, Pellona harroweri, and Peprilus paru); ii) 12.5 to 11.8 (Chirocentrodon bleekerianus, Lycengraulis grossidens, and Dorytheuthis plei); and iii) 10.5 (Xiphopenaeus kroyeri). Based on δ13C values, the prey groups were i) -15.3 (X. kroyeri); ii) -17.6 to -16.8 (C. bleekerianus, D. plei, P. harroweri, P. paru, and juvenile conspecifics); and iii) -18.7 (L. grossidens). The values of THg and δ15N highlighted juvenile conspecifics as the main via of this trace element and the most assimilated prey. The isotopic relation between predator and its prey species showed a feeding activity preferably coastal and pelagic.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Isótopos de Carbono
/
Cadena Alimentaria
/
Peces
/
Mercurio
/
Isótopos de Nitrógeno
Límite:
Animals
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
An Acad Bras Cienc
Año:
2016
Tipo del documento:
Article
País de afiliación:
Brasil