Regional movement patterns of a small-bodied shark revealed by stable-isotope analysis.
J Fish Biol
; 86(5): 1567-86, 2015 May.
Article
en En
| MEDLINE
| ID: mdl-25846994
ABSTRACT
This study used stable-isotope analysis to define the nearshore regional residency and movements of the small-bodied Australian sharpnose shark Rhizoprionodon taylori. Plasma and muscle δ(13) C and δ(15) N of R. taylori were collected from across five embayments and compared with values of seagrass and plankton from each bay. Linear distances between adjacent bays ranged from 30 to 150 km. There was a positive geographic correlation between R. taylori tissue and environmental δ(13) C values. Populations with the highest tissue δ(15) N were collected from bays that had the highest environmental δ(15) N values. These results suggest that R. taylori did not forage more than 100 km away from their capture location within 6 months to 1 year. The successful application of isotope analysis to define R. taylori movement demonstrates that this technique may be used in addition to traditional methods to study the movement of sharks, even within similar habitats across regionally small spatial scales (<100 km).
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Tiburones
/
Ecosistema
/
Actividad Motora
Límite:
Animals
País/Región como asunto:
Oceania
Idioma:
En
Revista:
J Fish Biol
Año:
2015
Tipo del documento:
Article
País de afiliación:
Australia