Bait efficiency to monitor mandi (Pimelodus maculatus) in the tailrace of hydropower dams, Southeast Brazil

Alexandre Peressin; Rafael Couto Rosa Souza; Alexandre Lima Godinho

doi:10.1590/S2179-975X3320

Short Research Note

Bait efficiency to monitor mandi (Pimelodus maculatus) in the tailrace of hydropower dams, Southeast Brazil

Eficiência de iscas no monitoramento do mandi (Pimelodus maculatus) no canal de fuga de usinas hidrelétricas no sudeste do Brasil

Alexandre Peressin; Rafael Couto Rosa Souza; Alexandre Lima Godinho

http://dx.doi.org/10.1590/S2179-975X3320 Acta Limnol. Bras. (Online), vol.33, e8, 2021

PDF

Downloads: 1

Abstract

Abstract: : Aim: This study compared the efficiency of two baits (earthworm and cow heart) for monitoring the abundance of mandi catfish (Pimelodus maculatus) in the tailrace of hydropower dams, one of the commonly killed fish in turbine procedures.

Methods: Sampling occurred every two months from February 2014 to December 2015 at the Camargos and Itutinga hydropower dams, located in the upper Paraná River basin, using hooks baited with earthworm and cow heart. We used generalized linear models to test the influence of dam, bait type, dam outflow discharge, water temperature, transparency, and dissolved oxygen on mandi abundance, calculated as catch per unit effort.

Results: Most mandi (73%) were caught using earthworms but catch per unit effort of mandi for both baits showed the same pattern of seasonal variation at each dam. At both dams, individuals of mandi sampled using earthworms were smaller than those sampled using cow heart, and water temperature was the only environmental variable significantly associated with the catch per unit effort of mandi.

Conclusions: Both baits are efficient to monitor seasonal variations in mandi abundance, which is influenced by water temperature. Monitoring the abundance of mandi in the tailrace can help minimizing fish mortality by scheduling risky turbine procedures for periods of lower mandi abundance.

Keywords

fish sampling, lure preference, fish mortality, turbine procedure

Resumo

Resumo:: Objetivo: O estudo comparou a eficiência de duas iscas (minhoca e coração de boi) no monitoramento da abundância do mandi (Pimelodus maculatus) no canal de fuga de barragens hidrelétricas, um dos peixes mais frequentemente mortos por manobras de turbinas.

Métodos: As amostragens foram bimestrais, de fevereiro de 2014 a dezembro de 2015, nas usinas hidrelétricas de Camargos e Itutinga, rio Grande, bacia do alto rio Paraná, usando anzóis iscados com minhoca e coração de boi. Usamos modelos lineares generalizados para testar a influência da usina hidrelétrica, tipo de isca, vazão defluente, temperatura, transparência e oxigênio dissolvido da água na abundância calculada pela captura por unidade de esforço de mandis.

Resultados: A maioria dos mandis (73%) foi capturada usando minhoca, mas as capturas por unidade de esforço verificadas para as duas iscas mostraram o mesmo padrão de variação sazonal nas duas usinas. Em ambas as usinas, os mandis capturados com minhoca foram menores que aqueles capturados com coração de boi, e a temperatura da água foi a única variável ambiental significativamente associada à abundância de mandis.

Conclusões: As duas iscas são eficientes para monitorar variações sazonais na abundância do mandi, que é influenciada apenas pela temperatura da água. Monitorar a abundância do mandi no canal de fuga pode auxiliar na redução da mortalidade de peixes, programando manobras arriscadas de turbinas para períodos de menor abundância do mandi.

Palavras-chave

amostragem de peixes, preferência por isca, mortalidade de peixe, manobra de turbina

Referencias

AGOSTINHO, A.A., GOMES, L.C., SUZUKI, H.I. and JÚLIO-JÚNIOR, H.F. Migratory fishes of the upper Paraná river basin, Brazil. In: J. CAROLSFELD, B. HARVEY, C. ROSS and A. BAER, eds. Migratory Fishes of South America: biology, fisheries and conservation status. Otawa: IDRC-World Bank, 2003, pp. 19-98.

ANDRADE, F., PRADO, I.G., LOURES, R.C. and GODINHO, A.L. Evaluation of techniques used to protect tailrace fishes during turbine maneuvers at Três Marias Dam, Brazil. Neotropical Ichthyology, 2012, 10(4), 723-730. http://dx.doi.org/10.1590/S1679-62252012000400005.

ELLIOTT, J.C. and BEAMESDERFER, R.C. Comparison of efficiency and selectivity of three gears used to sample white sturgeon in a Columbia River reservoir. In: R.C. BEAMESDERFER and A.A. NIGRO, eds. Status and habitat requirements of the white sturgeon populations in the Columbia River downstream from McNary Dam. Portland, Oregon: U.S. Department of Energy, 1992, pp. 17-29. Final Report of Research.

GODINHO, A.L. and KYNARD, B. Migratory fishes of Brazil: life history and fish passage needs. River Research and Applications, 2009, 25(6), 702-712. http://dx.doi.org/10.1002/rra.1180.

HAYES, W.A., FERRERI, C.P. and TAYLOR, W.W. Active fish capture methods. In: A.V. ZALE, D.L. PARRISH and T.M. SUTTON, eds. Fisheries techniques. Bethesda, USA: American Fisheries Society, 2012, pp. 193-220.

KENDALL, M.G., STUART, A. and ORD, J.K. Advanced theory of statistics. 4th ed. London: Charles Griffin, 1983, vol. 3: Design and analysis, and time-series.

LOURES, R.C., GODINHO, A.L., SILVA, R.J., ANDRADE, F.R., RÊGO, A.C.L., CARVALHO, M.M., PRADO, I.G., ARAÚJO, A.R., SILVA, T.T., RODRIGUES, R.R. and RESENDE, L.C. Methodology for risk assessment of fish death at hydropower plants. In: R.C. LOURES and GODINHO, A.L., eds. Risk assessment of fish death at hydropower plants in southeastern Brazil [online]. Belo Horizonte: CEMIG, 2017 [viewed 14 Apr 2020], pp. 37-70. Available from: http://www.cemig. com.br/pt- br/A_Cemig_e_o_Futuro/sustentabilidade/nossos_programas/ ambientais/peixe_vivo/publicacoes/Paginas/serie_peixe_vivo.aspx

LOURES, R.C.F. and POMPEU, P.S. Temporal variation in fish community in the tailrace of the Três Marias Hydroelectric Dam, São Francisco River, Brazil. Neotropical Ichthyology, 2012, 10(4), 731-740. http://dx.doi.org/10.1590/S1679-62252012000400006.

LOWE-MCCONNELL, R.H. Ecological studies in tropical fish communities. Cambridge: Cambridge University Press, 1987, 382 pp. http://dx.doi.org/10.1017/CBO9780511721892.

OLDANI, N.O., BAIGÚN, C.R.M., NESTLER, J.M. and GOODWIN, R.A. Is fish passage technology saving fish resources in the lower La Plata River basin? Neotropical Ichthyology, 2007, 5(2), 89-102. http://dx.doi.org/10.1590/S1679-62252007000200002.

OLIVEIRA, A.G., GOMES, L.C., LATINI, J.D. and AGOSTINHO, A.A. Implications of using a variety of fishing strategies and sampling techniques across different biotopes to determine fish species composition and diversity. Natureza & Conservação, 2014, 12(2), 112-117. http://dx.doi.org/10.1016/j.ncon.2014.08.004.

PERESSIN, A., PRADO, I.G., RESENDE, L.C., SILVA, T.T., CALDEIRA, Y.M. and GODINHO, A.L. Biology of mandi (Pimelodus maculatus) immediately downstream of hydropower plants of southeastern Brazil. In: LOURES, R.C. and A. L. GODINHO, eds. Risk assessment of fish death at hydropower plants in southeastern Brazil [online]. Belo Horizonte: CEMIG, 2017 [viewed 14 Apr 2020]. pp. 155-178. Available from: http://www.cemig.com.br/pt-br/A_Cemig_e_o_Futuro/sustentabilidade/nossos _programas/ambientais/peixe_vivo/publicacoes/Paginas/serie_peixe_vivo.aspx

R DEVELOPMENT CORE TEAM. R: A language and environment for statistical computing [online]. Vienna: R Foundation for Statistical Computing, 2019 [viewed 14 Apr 2020]. Available from: https://www.R-project.org/

RÊGO, A.C.L., PRADO, I.G., SILVA, T.T., LOURES, R.C., SILVA, R.J., MONTEIRO, A.B. and GODINHO, A.L. Fish affected by operational procedures of hydropower plants in southeastern Brazil. In: R.C. LOURES and A.L. GODINHO, eds. Risk assessment of fish death at hydropower plants in southeastern Brazil [online]. Belo Horizonte: CEMIG, 2017 [viewed 14 Apr 2020]. pp. 71-96. Available from: from: http://www.cemig.com.br/pt-br/A_Cemig_e_o_Futuro/sustentabilidade/nossos _programas/ambientais/peixe_vivo/publicacoes/Paginas/serie_peixe_vivo.aspx

ZUUR, A.F., IENO, E.N. and ELPHICK, C.S. A protocol for data exploration to avoid common statistical problems. Methods in Ecology and Evolution, 2010, 1(1), 3-14. http://dx.doi.org/10.1111/j.2041-210X.2009.00001.x.

Submitted date:
14/04/2020

Accepted date:
30/03/2021

Publication date:
11/05/2021

Bait efficiency to monitor mandi (Pimelodus maculatus) in the tailrace of hydropower dams, Southeast Brazil

Eficiência de iscas no monitoramento do mandi (Pimelodus maculatus) no canal de fuga de usinas hidrelétricas no sudeste do Brasil

Alexandre Peressin; Rafael Couto Rosa Souza; Alexandre Lima Godinho

Abstract

Keywords

Resumo

Palavras-chave

Referencias

Links

compartir

Acta Limnol. Bras. (Online)