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Vicente, Patrícia Nunes, 1980- (2015)
Languages: English
Types: Master thesis
Subjects: Ictiologia, Estuários - Portugal, Teses de mestrado - 2015
Tese de mestrado. Biologia (Ecologia Marinha). Universidade de Lisboa, Faculdade de Ciências, 2015 The objective of this study was to assess the variability in condition for juvenile common two-banded sea bream Diplodus vulgaris in nursery areas of the main Portuguese estuaries using several individual condition indices. Estuaries and coastal lagoons play an important role for juveniles of marine fish because they offer areas with high availability of food, high water temperature and lower predation. These characteristics permit a fast and safe growth of fish until they reach adequate size to return to the ocean and to join adult populations. In this study, two indices estimated by analysis of otolith microstructure were used: widths of the 10 last and of the 60 first daily increments were considered as recent growth index and initial growth index, respectively. Furthermore, two common condition indices were also used: biochemical RNA:DNA ratio, that assesses nutritional status of individuals, and morphometric Fulton's K, that gives an estimate of general well-being of individuals. Since recent growth index and RNA:DNA ratio were significantly related with total length of individuals, a correction was performed and corrected condition indices recent growth’ index and RNA:DNA’ ratio were considered. Fulton's K was also significantly related with total length of juveniles and for this reason was replaced by condition factor K', which considers allometry in the growth of fish. Condition factor K' was considered in the study. A significant positive correlation between recent growth’ and initial growth indices was obtained. Results of the multiple regression analyses seem to reflect the discrepancy in the response times of the different condition indices used. In general, Sado, Ria Formosa and Guadiana provided juveniles in better individual condition. Future studies should be done to better investigate relationships between condition indices and between condition indices and environmental variables, focusing on the link between individual condition and habitat quality of nursery areas. O objetivo deste estudo foi avaliar a condição dos juvenis de sargo-safia, Diplodus vulgaris, em áreas de viveiro dos principais estuários da costa Portuguesa, utilizando vários índices de condição individual. Os estuários e lagoas costeiras desempenham uma função importante para os juvenis de muitas espécies de peixes marinhos porque oferecem elevada disponibilidade de alimento, águas quentes e menor pressão predatória. Estas caraterísticas permitem que os juvenis cresçam rapidamente e em segurança até atingirem dimensões suficientes para regressar ao mar e recrutar para as populações adultas. Neste estudo, foram usados dois índices baseados na análise da microestrutura dos otólitos: as larguras dos 10 últimos e dos 60 primeiros incrementos diários foram considerados como um índice de crescimento recente e um índice de crescimento inicial, respetivamente. Além disso, foram considerados o rácio bioquímico ARN:ADN, que estima o estado nutricional dos indivíduos, e o morfométrico K de Fulton, que avalia o bem-estar geral dos indivíduos. Uma vez que o índice de crescimento recente e o rácio ARN:ADN apresentaram uma relação significativa com o comprimento total dos indivíduos, foi efetuada uma correção e os índices corrigidos índice de crescimento recente' e rácio ARN:ADN’ foram considerados. Também o K de Fulton mostrou-se significativamente relacionado com o comprimento total dos juvenis e foi substituído pelo fator de condição K', o qual considera o crescimento do peixe alométrico. Os resultados mostraram uma correlação positiva significativa entre os índices de crescimento recente’ e de crescimento inicial. Os resultados das regressões múltiplas parecem mostrar discrepância nos tempos de resposta dos diferentes índices de condição usados. Em geral, Sado, Ria Formosa e Guadiana apresentaram juvenis em melhor condição. No futuro, deve-se investigar melhor as relações entre os índices de condição e entre os índices de condição e as variáveis ambientais, focando a ligação entre condição individual e qualidade do habitat das áreas de viveiro.
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    • Francis, R.IC.C., Campana, S.E., 2004. Inferring age from otolith measurements: a review and a new approach. Can. J. Fish. Aquat. Sci. 61, 1269-1284.
    • Gordoa, A., Molí, B., 1997. Age and growth of the sparids Diplodus vulgaris, D. sargus and D. annularis in adult populations and the differences in their juvenile growth patterns in the north-western Mediterranean Sea. Fish. Res. 33, 123-129.
    • Green, B.S., McCormick, M.I., 2005. Maternal and paternal effects determine size, growth and performance in larvae of a tropical reef fish. Mar. Ecol. Prog. Ser. 289, 263-272.
    • Gunn, J.S., Thresher, R.E., 1991. Viviparity and the reproductive ecology of clinid fishes (Clinidae) from temperate Australian waters. Env. Biol. Fishes 31, 323-344.
    • Hovenkamp, F., Witte, J.IJ., 1991. Growth, otolith growth and RNA/DNA ratios of larval plaice Pleuronectes platessa in the North Sea 1987 to 1989. Mar. Ecol. Prog. Ser. 70, 105-116.
    • Kerambrun, E., Henry, F., Perrichon, P., Courcot, L., Meziane, T., Spilmont, N., Amara, R., 2012. Growth and condition indices of juvenile turbot, Scophthalmus maximus, exposed to contaminated sediments: Effects of metallic and organic compounds. Aquat. Toxicol. 108, 130-40.
    • Labropoulou, M., Papaconstantinou, C., 2000. Comparison of otolith growth and somatic growth in two macrourid fishes. Fish. Res. 46, 177-188.
    • Lloret, J., Planes, S., 2003. Condition, feeding and reproductive potential of white seabream Diplodus sargus as indicators of habitat quality and the effect of reserve
    • protection in the northwestern Mediterranean. Mar. Ecol. Prog. Ser. 248, 197-208.
    • Ribeiro, J., Bentes, L., Coelho, R., Gonçalves, J.M.S., Lino, P.G., Monteiro, P., Erzini, K., 2006. Seasonal, tidal and diurnal changes in fish assemblages in the Ria Formosa lagoon (Portugal). Estuar. Coast. Shelf Sci. 67, 461-474.
    • Ribeiro, J., Monteiro, C.C., Monteiro, P., Bentes, L., Coelho, R., Gonçalves, J.M.S., Lino, P.G., Erzini, K., 2008. Long-term changes in fish communities of the Ria Formosa coastal lagoon (southern Portugal) based on two studies made 20 years apart. Est. Coast. Shelf Sci. 76, 57-68.
    • Richter, H., Lückstädt, C., Focken, U.L., Becker, K., 2000. An improved procedure to assess fish condition on the basis of length-weight relationships. Arch. Fish. Mar. Res. 48(3), 226- 235.
    • Rossi-Wongtschowski, C.L.D.B., Clemmesen, C., Ueberschär, B., Dias, J.F., 2003. Larval condition and growth of Sardinella brasiliensis (Steindachner, 1879): preliminary results from laboratory studies. Sci. Mar. 67(1), 13-23.
    • Saoud, I.P., Batal, M., Ghanawi, J., Lebbos, N., 2008. Seasonal evaluation of nutritional benefits of two fish species in the eastern Mediterranean Sea. Int. J. Food Sci. Tech. 43, 538-542.
    • Searcy, S.P., Sponaugle, S., 2000. Variable larval growth in a coral reef fish. Mar. Ecol. Prog. Ser. 206, 213-226.
    • Sissenwine, M.M., Mace, P.M., Lassen, H.J., 2014. Preventing overfishing: evolving approaches and emerging challenges. ICES J. Mar. Sci. 71(2), 153-156.
    • Stevenson, R.D., Woods Jr., W.A., 2006. Condition indices for conservation: new uses for evolving tools. Integ. Comp. Biol. 46(6), 1169-1190.
    • Stewart, W.T., n.d. Otolith aging and analysis. Computational Bioscience Program. Arizona State University, 1-31.
    • Suthers, I.M., 1998. Bigger? Fatter? Or is faster growth better? Considerations on condition in larval and juvenile coral-reef fish. Aust. J. Ecol. 23, 265-273.
    • Taieb, A.H., Ghorbel, M., Hamida, N.B.H., Jarboui, O., 2012. Reproductive biology, age and growth of the two-banded seabream Diplodus vulgaris (Pisces: Sparidae) in the Gulf of Gabès, Tunisia. J. Mar. Biol. Assoc. U.K. 1-7.
    • Vasconcelos, R.P., Reis-Santos, P., Fonseca, V., Maia, A., Ruano, M., França, S., Vinagre, C., Costa, M.J., Cabral, H.N., 2007a. Assessing anthropogenic pressures on estuarine fish nurseries along the Portuguese coast: A multi-metric index and conceptual approach. Sci. Tot. Env. 374(2-3), 199-215.
    • Vasconcelos, R.P., Reis-Santos, P., Tanner, S., Fonseca, V., Latkoczy, C., Günther, D., Costa, M.J., Cabral, H., 2007b. Discriminating estuarine nurseries for five fish species through otolith elemental fingerprints. Mar. Ecol. Prog. Ser. 350, 117-126.
    • Vasconcelos, R.P., Reis-Santos, P., Maia, A., Fonseca, V., França, S., Wouters, N., Costa, M.J., Cabral, H.N., 2010. Nursery use patterns of commercially important marine fish species in estuarine systems along the Portuguese coast. Estuar. Coast. Shelf Sci. 86, 613-624.
    • Victor, B.C., Brothers, E.B., 1982. Age and growth of the fallfish Semotilus corporalis with daily otolith increments as a method of annulus verification. Can. J. Zool. 60, 2543-2550.
    • Vigliola, L., 1997. Validation of daily increment formation in otoliths for three Diplodus species in the Mediterranean sea. J. Fish Biol. 51, 349-360.
    • Vigliola, L., Harmelin-Vivien, M.L., Biagi, F., Galzin, R., Garcia-Rubies, A., Harmelin, JG., Jouvenel, JY., Le Direach-Boursier, L., Macpherson, E., Tunesi, L., 1998. Spatial and temporal patterns of settlement among sparid fishes of the genus Diplodus in the northwestern Mediterranean. Mar. Ecol. Prog. Ser. 168, 45-56.
    • Vigliola, L., Harmelin-Vivien, M., Meekan, M.G., 2000. Comparison of techniques of backcalculation of growth and settlement marks from the otoliths of three species of Diplodus from the Mediterranean Sea. Can. J. Fish. Aquat. Sci. 57, 1291-1299.
    • Vigliola, L., Doherty, P.J., Meekan, M.G., Drown, D.M., Jones, M.E., Barber, P.H., 2007. Genetic identity determines risk of post-settlement mortality of a marine fish. Ecol. 88(5), 1263- 1277.
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