Fish in habitats with higher motorboat disturbance show reduced sensitivity to motorboat noise.
Biol Lett
; 14(10)2018 10 03.
Article
em En
| MEDLINE
| ID: mdl-30282747
ABSTRACT
Anthropogenic noise can negatively impact many taxa worldwide. It is possible that in noisy, high-disturbance environments, the range and severity of impacts could diminish over time, but the influence of previous disturbance remains untested in natural conditions. This study demonstrates the effects of motorboat noise on the physiology of an endemic cichlid fish in Lake Malawi. Exposure to motorboats (driven 20-100 m from fish) and loudspeaker playback of motorboat noise both elevated the oxygen-consumption rate at a single lower-disturbance site, characterized by low historic and current motorboat activity. Repeating this assay at further lower-disturbance sites revealed a consistent effect of elevated oxygen consumption in response to motorboat disturbance. However, when similar trials were repeated at four higher-disturbance sites, no effect of motorboat exposure was detected. These results demonstrate that disturbance history can affect local population responses to noise. Action regarding noise pollution should consider the past, as well as the present, when planning for the future.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Navios
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Ciclídeos
/
Ruído
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
País como assunto:
Africa
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article