Estimation of peacock bass (Cichla spp.) mortality rate during catch-release fishing employing different post-capture procedures

Abstract

The effect of catch-and-release fishing on the survival of peacock bass (Cichla spp.) was evaluated by comparing two types of artificial bait (jig and shallow-diver plugs) and two types of post-catch confinement. Two experiments were conducted during the periods January-February and October-November 2012 in the Unini River, a right-bank tributary of the Negro River. In total, 191 peacock bass were captured. Both groups of fish were subjected to experimental confinement (collective and individual) for three days. Additionally, 11 fish were tagged with radio transmitters for telemetry monitoring. Mortality rate was estimated as the percentage of dead individuals for each type of bait and confinement. For peacock bass caught with jig baits, mortality was zero. The corresponding figure for shallow-diver bait was 1.66% for fish in collective containment, 18.18% for fish monitored by telemetry and 0% for individuals confined individually. Our results show low post-release mortality rates for peacock bass. Furthermore, neither the type of confinement nor the type of bait had a statistically significant influence on mortality rates. While future studies could include other factors in the analysis, our results show that catch-and-release fishing results in low mortality rates.Keywords: Cichla spp., angling, artificial baits, fish mortality, post-catch confinement.Estimativa da taxa de mortalidade do tucunaré (Cichla spp.) durante a prática do pesque-solte ResumoO efeito do pesque-solte na sobrevivência do tucunaré (Cichla spp.) foi avaliado comparando dois tipos de iscas artificiais, jig e de meia-água, e dois tipos de confinamento pós-captura. Dois experimentos foram conduzidos durante os períodos de janeiro-fevereiro e outubro-novembro de 2012, no Rio Unini, afluente da margem direita do Rio Negro. No total, 191 tucunarés foram capturados. Os peixes foram submetidos a um confinamento experimental (coletivo e individual) com duração de três dias. Além disso, 11 peixes foram marcados com radiotransmissores e liberados imediatamente após a captura, sendo monitorados por telemetria. A taxa de mortalidade foi calculada como a porcentagem de indivíduos mortos para cada tipo de isca e tratamento (confinamento individual, coletivo e sem confinamento). Não houve mortalidade para o grupo de tucunarés capturados com isca jig. A isca de meia-água mostrou uma taxa de mortalidade de 1,66% para o confinamento coletivo e 18,18% para os peixes monitorados por telemetria. Nossos resultados mostraram baixas taxas de mortalidade pós-soltura para tucunaré. Além disso, nem o tipo de confinamento, nem o tipo de isca tiveram influência significativa nas taxas de mortalidade. Ainda que estudos futuros possam incluir novos fatores na análise, os nossos resultados mostram que a prática do pesque-solte resulta em baixas taxas de mortalidade.Palavras-chave: Cichla spp., pesca, iscas artificiais, mortalidade de peixes, confinamento pós-captura.

Perfil socioeconômico e conhecimento de guias-piloteiros da bacia do médio Rio Negro, Amazonas

“…(ALBANO et al 2014). Em estudos voltados a testar o efeito do pesque-solte sobre a sobrevivência do tucunaré na região do Médio Rio Negro, tem-se observado baixas taxas de mortalidade desses animais após soltura (HOLLEY et al, 2008;THOMÉ-SOUZA et al, 2014;BARROCO et al, 2018).…”

A review on introduced Cichla spp. and emerging concerns

“…Sport-fishing is a community-based recreational activity that provides job opportunities and income in North America, several European countries and also in Brazil (Howells and Garrett, 1992;Shafland, 1999a;Cooke and Suski, 2004;Holley et al, 2008;Barroco et al, 2018;Golani et al, 2019). In Texas and Florida (North America) alone, sport-fishing is an activity participated by some 36 million anglers that collectively supports the fisheries and tourism industry with an annual revenue in exceed of USD 2.4 billion (Courtenay et al, 1973;Shafland and Stanford, 1999).…”

“…In Texas and Florida (North America) alone, sport-fishing is an activity participated by some 36 million anglers that collectively supports the fisheries and tourism industry with an annual revenue in exceed of USD 2.4 billion (Courtenay et al, 1973;Shafland and Stanford, 1999). In Brazil, sport-fishing has provided job opportunities to about 250,000 citizens and produced a turnover of USD 500 million (Barroco et al, 2018). Similarly, 16 million anglers contributed to over 150,000 metric tonnes of catch in Europe (Cowx, 2015).…”

“…Perhaps the fast moving and aggressive nature of Cichla as claimed by the anglers in Tasik Telabak (Malaysia) are reasons for its translocation world wide (Figure 3). In addition, C. ocellaris is preferred by anglers because it is less vulnerable (<5 % mortality) to catch-and-release fishing (Figure 3; Shafland, 1999b;Shafland and Stanford, 1999;Cooke and Suski, 2004;Holley et al, 2008;Rahim et al, 2013;Barroco et al, 2018;Khaleel et al, 2020). In fact, only 97 fish were killed by inexperience hook release where AE2 % of the C. ocellaris deaths occurred after lethal hook puncture to the gills (Thom e-Souza et al, Bower et al, 2016).…”

Trophic ecology of speckled peacock bass Cichla temensis Humboldt 1821 in the middle Negro River, Amazon, Brazil

“…The dominant type of capture is the recreational fishery following a catch-and-release attitude producing a low mortality rate (Barroco, Freitas, & Lima, 2017). fisheries are of low intensity.…”