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Exploring the effect of strong hydrological droughts and floods on populational parameters of Semaprochilodus insignis (Actinopterygii: Prochilodontidae) from the Central Amazonia

Author

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  • Ana Isabel Camacho Guerreiro

    (Instituto Nacional de Pesquisas da Amazônia (INPA))

  • Sidineia Aparecida Amadio

    (Instituto Nacional de Pesquisas da Amazônia (INPA))

  • Nídia Noemi Fabré

    (Universidade Federal de Alagoas (UFAL))

  • Vandick Silva Batista

    (Universidade Federal de Alagoas (UFAL))

Abstract

In Amazonia, commercially important fish species—such as Semaprochilodus insignis—are highly dependent on the hydrological regime, that is, the flood pulse. As waters begin to rise, this species migrates from nutrient-poor rivers to nutrient-rich rivers via their associated floodplains, using such habitats as spawning and nursery grounds. However, strong droughts or floods may alter such dynamics. Therefore, this study was aimed at answering the following questions: (1) Is there any relationship between the flood amplitude and the growth of S. insignis caught in the lower Solimões River? (2) Is there any relationship between the yearly maximum river level and the fishing mortality of S. insignis caught in the upper Amazon River? Growth parameters were estimated using the ELEFAN routine. Explanatory variables hypothesised to be relevant predictors of populational parameters were tested using multiple linear models. A 2-year-lagged effect of flood amplitude resulted in a decline in the growth of S. insignis. In contrast, in relation to years with the highest maximum water levels, an immediate and 1-year-lagged reduction in fishing mortality was observed. Therefore, despite the negative impact of years with high flood amplitude on the growth of this species, it is apparent that a sequence of years with La Niña influence helped in the recovery of S. insignis.

Suggested Citation

  • Ana Isabel Camacho Guerreiro & Sidineia Aparecida Amadio & Nídia Noemi Fabré & Vandick Silva Batista, 2021. "Exploring the effect of strong hydrological droughts and floods on populational parameters of Semaprochilodus insignis (Actinopterygii: Prochilodontidae) from the Central Amazonia," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 23(3), pages 3338-3348, March.
    • Handle: RePEc:spr:endesu:v:23:y:2021:i:3:d:10.1007_s10668-020-00721-1
    DOI: 10.1007/s10668-020-00721-1
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    References listed on IDEAS

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    1. Hoenig, N.A. & Hanumara, R.C., 1990. "An empirical comparison of seasonal growth models," Fishbyte, The WorldFish Center, vol. 8(1), pages 32-34.
    2. Anonymous, 1969. "I. United Nations," International Organization, Cambridge University Press, vol. 23(4), pages 971-989, October.
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    1. Wandicleia Lopes de Sousa & Diego Maia Zacardi & Thiago Almeida Vieira, 2022. "Traditional Ecological Knowledge of Fishermen: People Contributing towards Environmental Preservation," Sustainability, MDPI, vol. 14(9), pages 1-29, April.

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