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Stock identification of tainha (Mugil liza) by analyzing stable carbon and oxygen isotopes in otoliths

2017; National Oceanic and Atmospheric Administration; Volume: 115; Issue: 2 Linguagem: Inglês

10.7755/fb.115.2.7

1937-4518

Valéria M. Lemos, Cassiano Monteiro‐Neto, Henrique N. Cabral, João P. Vieira,

Marine and fisheries research

We investigated the use of δ 13 C and δ 18 O stable isotopes in otoliths of juvenile tainha (Mugil liza) as indicators of the stock structure of this species of mullet in the southern Atlantic Ocean.Our analysis identified 2 different spawning stocks along the Brazilian coast: the southern stock, from São Paulo (25°S) to Chui (33°S), with distinct seawater temperature requirements for spawning (18-21°C), and the northern stock, from Rio de Janeiro (23°S) to the north (up to 19°S), spawning in seawater temperatures of 21-24°C.These results will contribute to the development of appropriate stock management measures.