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An Inexpensive Baited Trap for Collecting Cryptic Decapod Crustacaens

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[An inexpensive trap designed to collect cryptic decapods is described. The capture of Lysmata seticaudata was used as a case study to test trap effectiveness. Two soak times (24 and 48 h) and three baits (salted sardines (SS), tinned sardines (TS), and scabbard fish guts (SFG)) were tested. The average cost per trap varied between € 5.00 and € 2.50 for ballasted and not ballasted traps, respectively. Lysmata seticaudata was the most frequently collected decapod, followed by Palaemon serratus and Athanas nitescens forma nitescens . A significantly higher (p <0.001) number of L. seticaudata was captured after 24 and 48 h when SS were used, with an average number of Lysmata per trap(± S.D.) of 9.47(± 1.83) and 10.13(±1.84), respectively. Traps baited with TS or with SFG (set for 24 and 48 h) captured an average number of L. seticaudata per trap(± S.D.) of 2.40(± 2.2), 1.99 (± 1.80) and 0.65(± 0.57), 0.96(± 0.66), respectively. No significant differences were recorded on the number of L. seticaudata captured in traps set for 24 or 48 h using the same bait. Future improvements on trap design, aimed at increasing effectiveness, are also addressed. O presente trabalho descreve uma armadilha pouco dispendiosa desenhada para capturar crustáceos decápodes. A captura do camarão Lysmata seticaudata foi utilizada para testar a eficácia da armadilha apresentada. Foram testados dois tempos de imersão (24 e 48 h) e três iscos (sardinhas salgadas (SS), sardinhas enlatadas (TS) e vísceras de peixe espada (SFG)). O custo médio por armadilha variou entre €5.00 e € 2.50 para armadilhas com e sem balastro, respectivamente. Lysmata seticaudata foi o decápode capturado mais frequentemente, seguido por Palaemon serratus e Athanas nitescens forma nitescens . Um número significativamente maior (p <0.001) de Lysmata foi capturado após 24 e 48 h quando foram usadas SS com isco, com um número médio de Lysmata por armadilha (± S .D.) de 9.47(± 1. 83 ) e 10.13(±1.84), respectivamente. As armadilhas iscadas com TS e SFG (colocadas durante 24 e 48 h) capturaram um número médio de Lysmata por armadilha(± S.D.) de 2.40(± 2.24 ), 1.99(± 1. 80)e 0.65(± 0. 57) e 0.96(±0.66), respectivamente. Não foram registadas diferenças significativas no número de Lysmata capturados em armadilhas utilizando o mesmo isco e colocadas durante 24 e 48 h. No presente trabalho são igualmente abordados melhoramentos futuros no desenho das armadilhas que possam aumentar a sua eficácia de captura., An inexpensive trap designed to collect cryptic decapods is described. The capture of Lysmata seticaudata was used as a case study to test trap effectiveness. Two soak times (24 and 48 h) and three baits (salted sardines (SS), tinned sardines (TS), and scabbard fish guts (SFG)) were tested. The average cost per trap varied between € 5.00 and € 2.50 for ballasted and not ballasted traps, respectively. Lysmata seticaudata was the most frequently collected decapod, followed by Palaemon serratus and Athanas nitescens forma nitescens . A significantly higher (p <0.001) number of L. seticaudata was captured after 24 and 48 h when SS were used, with an average number of Lysmata per trap(± S.D.) of 9.47(± 1.83) and 10.13(±1.84), respectively. Traps baited with TS or with SFG (set for 24 and 48 h) captured an average number of L. seticaudata per trap(± S.D.) of 2.40(± 2.2), 1.99 (± 1.80) and 0.65(± 0.57), 0.96(± 0.66), respectively. No significant differences were recorded on the number of L. seticaudata captured in traps set for 24 or 48 h using the same bait. Future improvements on trap design, aimed at increasing effectiveness, are also addressed. O presente trabalho descreve uma armadilha pouco dispendiosa desenhada para capturar crustáceos decápodes. A captura do camarão Lysmata seticaudata foi utilizada para testar a eficácia da armadilha apresentada. Foram testados dois tempos de imersão (24 e 48 h) e três iscos (sardinhas salgadas (SS), sardinhas enlatadas (TS) e vísceras de peixe espada (SFG)). O custo médio por armadilha variou entre €5.00 e € 2.50 para armadilhas com e sem balastro, respectivamente. Lysmata seticaudata foi o decápode capturado mais frequentemente, seguido por Palaemon serratus e Athanas nitescens forma nitescens . Um número significativamente maior (p <0.001) de Lysmata foi capturado após 24 e 48 h quando foram usadas SS com isco, com um número médio de Lysmata por armadilha (± S .D.) de 9.47(± 1. 83 ) e 10.13(±1.84), respectivamente. As armadilhas iscadas com TS e SFG (colocadas durante 24 e 48 h) capturaram um número médio de Lysmata por armadilha(± S.D.) de 2.40(± 2.24 ), 1.99(± 1. 80)e 0.65(± 0. 57) e 0.96(±0.66), respectivamente. Não foram registadas diferenças significativas no número de Lysmata capturados em armadilhas utilizando o mesmo isco e colocadas durante 24 e 48 h. No presente trabalho são igualmente abordados melhoramentos futuros no desenho das armadilhas que possam aumentar a sua eficácia de captura.]

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/content/journals/10.1163/1568540041181510
2004-03-01
2016-12-05

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