Use of otolith strontium:calcium and zinc:calcium ratios as an indicator
               of the <i>habitat</i> of <i>Percophis brasiliensis</i> Quoy &amp;
               Gaimard, 1825 in the southwestern Atlantic Ocean

Avigliano, Esteban; Saez, Margarita B.; Rico, Rita; Volpedo, Alejandra V.

doi:10.1590/1982-0224-20130235

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Articles • Neotrop. ichthyol. 13 (1) • Jan-Mar 2015 • https://doi.org/10.1590/1982-0224-20130235 copy

Use of otolith strontium:calcium and zinc:calcium ratios as an indicator of the habitat of Percophis brasiliensis Quoy & Gaimard, 1825 in the southwestern Atlantic Ocean

Authorship SCIMAGO INSTITUTIONS RANKINGS

We evaluate the simultaneous use of Sr: Ca and Zn: Ca ratios of the sagitta otolith as a potential indicator of the habitat of Percophis brasiliensis along a latitudinal gradient in the southwestern Atlantic Ocean (34-42ºS and 51-67ºW), in order to reliably identify fish stocks. Fish were collected in three sampling sites: Argentine-Uruguayan Common Fishing Zone (AUCFZ), El Rincón (ER) and San Matías Gulf (SMG). The otolith Sr:Ca and Zn:Ca ratios were determined by ICP-OES and EDTA volumetric method. The otolith Sr:Ca ratio was similar in the three sampling sites, while the Zn:Ca ratio was significantly higher in AUCFZ than in ER and SMG for all age groups. The discriminant analysis showed an association between the otolith Sr:Ca and Zn:Ca ratios from ER and SMG. Present results suggest the potential occurrence of two fish stocks of P. brasiliensis in the study area.

Argentina; Brazilian flathead; Fish stock; Microchemistry; Percophidae

RF Power	1.3 kW
Plasma gas flow rate	15.0 L/min
Nebulizer gas flow rate	0.80 L/min
Auxiliary gas flow rate	0.20 L/min
Pump flow rate	1.2 ml/min
Delay time	20 seg
Flush time	20 seg
Number of replicates	3

Age	AUCFZ	ER	SMG
3 - 5	31	21	7
6 - 7	12	8	10
8 - 9	10	9	19
10 - 11	-	6	10

Sr:Ca (mmol mol^-1)
Age	AUCFZ	El Rincón	SMG
3 - 5	2.16±0.41^a	2.27±0.28^a	2.07±0.33^a
6 - 7	2.39±0.31^a	2.80±0.40^a	2.29±0.70^a
8 - 9	3.07±0.36^a	3.30±0.96^a	3.25±1.39^a
10 - 11	-	2.80±0.29^a	2.92±0.47^a
Zn:Ca (mmol mol^-1)
3 - 5	0.45±0.38^a	0.25±0.11^b	0.27±0.29^b
6 - 7	0.35±0.18^a	0.14±0.11^b	0.18±0.13^b
8 - 9	0.25±0.09^a	0.14±0.07^b	0.13±0.09^b
10 - 11	-	0.15±0.04^a	0.11±0.06^a

Age (years)
	3-5 (a)	6-7 (b)	8-9 (c)	10-11 (d)
% FCA	82.78	69.05	98.69	99.99
Sr:Ca eigenvalues	-0.94	-0.4	-0.45	-0.53
Zn:Ca eigenvalues	3.07	6.24	12.28	0.94

Sociedade Brasileira de Ictiologia Neotropical Ichthyology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Universidade Estadual de Maringá., Av. Colombo, 5790, 87020-900, Phone number: +55 44-3011-4632 - Maringá - PR - Brazil
E-mail: neoichth@nupelia.uem.br

Acompanhe os números deste periódico no seu leitor de RSS

[TFN01] Letters in brackets indicate the reference to Fig. 4 (a-d) .