Resumo
The white croaker Micropogonias fumieri (Desmarest, 1823) is one of the most abundant fish species in the Sepetiba Bay, being heavily exploited in fisheries. Two hundred eleven fishes, captured from October 1998 to September 1999, in monthly samplings with otter trawling, were studied. The aim here is to characterize morphometrics of populations that use de Bay in order to compare with other areas. Measurements included standard length (SL), head length (HL), Pre-dorsal distance (PDD), pectoral distance (PD), ventral distance (VD) and anal distance (AD), pectoral length (PL) and eye diarneter (ED). The values of HL, PDD, PD, VD, AD, were related to SL, while ED was related to HL. Scatterplot from logaritrnized data, by sex, were analyzed in order to assess alometry. Males outnumber females with differences being highly significant (p < 0.01), mainly in size c1ass 100 and 150 mm SL. The studied population varying from 62 to 205 mm. Head length varied from 28.7 to 38.6% SL; PDD 32.5 to 42.9%; PD 276 to 41.1 %; VD 26.6 to 44.8%; AD 58.1 to 76.8%; and PL 10.8 to 29.8%. Eye diameter varied from 16.7 to 26.1 % HL. Positive alometry (k > I) were shown for PL in both sexes, and for AD in female, indicating that these measurements increase proportionately more than the standard length; isometric growth (k = 1) were shown for HL, PDD, PD, VD in both sexes, for AD in males; negative alometry (k < 1) was shown only for ED in relation to head length (HL), in both males and females. The white croaker populations in lhe Sepetiba Bay seems to be similar in their morphometrics aspects to the populations of coastal zone at Southeast Brazil, which differ from South coastal zone populations.
Morphometric; Sciaenidae; coastal fishes; bays; Sepetiba Bay
Morphometric; Sciaenidae; coastal fishes; bays; Sepetiba Bay
Caracterização morfométrica da corvlna Micropogonias furnieri (Desmarest) (Pisces, Sciaenidae) na Baía de Sepetiba, Rio de Janeiro, Brasil
Morphometric characterization of the white croaker Micropogonias furnieri (Desmarest) (Pisces, Sciaenidae) in Sepetiba Bay, Rio de Janeiro, Brazil
Rafaela Nascimento VicentiniI,II; Francisco Gerson AraújoI,III
ILaboratório de Ecologia de Peixes, Posto de Aquicultura, Universidade Federal Rural do Rio de Janeiro. Antiga Rodovia Rio-São Paulo, Km 47, 23851-970 Seropédica, Rio de Janeiro, Brasil
IIBolsista de Iniciação Científica do CNPq. Email rnvicentini@bol.com.br
IIIPesquisador do CNPq. Email: gerson@ufrrj.br
ABSTRACT
The white croaker Micropogonias fumieri (Desmarest, 1823) is one of the most abundant fish species in the Sepetiba Bay, being heavily exploited in fisheries. Two hundred eleven fishes, captured from October 1998 to September 1999, in monthly samplings with otter trawling, were studied. The aim here is to characterize morphometrics of populations that use de Bay in order to compare with other areas. Measurements included standard length (SL), head length (HL), Pre-dorsal distance (PDD), pectoral distance (PD), ventral distance (VD) and anal distance (AD), pectoral length (PL) and eye diarneter (ED). The values of HL, PDD, PD, VD, AD, were related to SL, while ED was related to HL. Scatterplot from logaritrnized data, by sex, were analyzed in order to assess alometry. Males outnumber females with differences being highly significant (p < 0.01), mainly in size c1ass 100 and 150 mm SL. The studied population varying from 62 to 205 mm. Head length varied from 28.7 to 38.6% SL; PDD 32.5 to 42.9%; PD 276 to 41.1 %; VD 26.6 to 44.8%; AD 58.1 to 76.8%; and PL 10.8 to 29.8%. Eye diameter varied from 16.7 to 26.1 % HL. Positive alometry (k > I) were shown for PL in both sexes, and for AD in female, indicating that these measurements increase proportionately more than the standard length; isometric growth (k = 1) were shown for HL, PDD, PD, VD in both sexes, for AD in males; negative alometry (k < 1) was shown only for ED in relation to head length (HL), in both males and females. The white croaker populations in lhe Sepetiba Bay seems to be similar in their morphometrics aspects to the populations of coastal zone at Southeast Brazil, which differ from South coastal zone populations.
Key Words: Morphometric, Sciaenidae, coastal fishes, bays, Sepetiba Bay
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AGRADECIMENTOS. Aos colegas e amigos do Laboratório de Ecologia de peixes da UFRRJ. Este trabalho foi realizado com apoio do Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, através de bolsas e auxílio-pesquisa ao projeto Bioecologia de Peixes da Baía de Sepetiba (Proc. CNPq 522317/96-0 e 46.3317/00-9)
Recebido em 08.VI.2001; aceito em 17.VI.2002.
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- MENEZES, N.A. & J.L. FIGUEIREDO. 1980. Manual de peixes marinhos do sudeste do Brasil. IV. Teleostei (3). São Paulo, Museu de Zoologia, 96p.
- VAZZOLER, A.E.A. DE M. 1971. Diversificação fisiológica e morfológica de Micropogonias furnieri (Desrnarest, 1823) ao sul de Cabo Frio, Brasil. Bol. Inst. Oceanogr., São Paulo, 20 (2): 1-71.
- _____. 1991. Síntese de conhecimentos sobre a biologia da corvina Micropogonias furnieri (Desmarest, 1823), da costa do Brasil. Atlântica, Rio Grande, 13 (1): 55-74.
- ZAR, J.H. 1984. Biostatistical analysis. New Jersey, Prentice Hall, 718p.
Datas de Publicação
-
Publicação nesta coleção
03 Jun 2009 -
Data do Fascículo
Jul 2002
Histórico
-
Recebido
08 Jun 2001
