Seismic surveys negatively affect humpback whale singing activity off northern Angola.
Passive acoustic monitoring was used to document the presence of singing humpback whales off the coast of Northern Angola, and opportunistically test for the effect of seismic survey activity in the vicinity on the number of singing whales. Two Marine Autonomous Recording Units (MARUs) were deployed...
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ftdoajarticles:oai:doaj.org/article:a37a414e51b94d6d800bebb909b44b21 2023-05-15T16:36:09+02:00 Seismic surveys negatively affect humpback whale singing activity off northern Angola. Salvatore Cerchio Samantha Strindberg Tim Collins Chanda Bennett Howard Rosenbaum 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0086464 https://doaj.org/article/a37a414e51b94d6d800bebb909b44b21 EN eng Public Library of Science (PLoS) https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24618836/?tool=EBI https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0086464 https://doaj.org/article/a37a414e51b94d6d800bebb909b44b21 PLoS ONE, Vol 9, Iss 3, p e86464 (2014) Medicine R Science Q article 2014 ftdoajarticles https://doi.org/10.1371/journal.pone.0086464 2022-12-31T04:54:29Z Passive acoustic monitoring was used to document the presence of singing humpback whales off the coast of Northern Angola, and opportunistically test for the effect of seismic survey activity in the vicinity on the number of singing whales. Two Marine Autonomous Recording Units (MARUs) were deployed between March and December 2008 in the offshore environment. Song was first heard in mid June and continued through the remaining duration of the study. Seismic survey activity was heard regularly during two separate periods, consistently throughout July and intermittently in mid-October/November. Numbers of singers were counted during the first ten minutes of every hour for the period from 24 May to 1 December, and Generalized Additive Mixed Models (GAMMs) were used to assess the effect of survey day (seasonality), hour (diel variation), moon phase and received levels of seismic survey pulses (measured from a single pulse during each ten-minute sampled period) on singer number. Application of GAMMs indicated significant seasonal variation, which was the most pronounced effect when assessing the full dataset across the entire season (p<0.001); however seasonality almost entirely dropped out of top-ranked models when applied to a reduced dataset during the July period of seismic survey activity. Diel variation was significant in both the full and reduced datasets (from p<0.01 to p<0.05) and often included in the top-ranked models. The number of singers significantly decreased with increasing received level of seismic survey pulses (from p<0.01 to p<0.05); this explanatory variable was included among the top ranked models for one MARU in the full dataset and both MARUs in the reduced dataset. This suggests that the breeding display of humpback whales is disrupted by seismic survey activity, and thus merits further attention and study, and potentially conservation action in the case of sensitive breeding populations. Article in Journal/Newspaper Humpback Whale Directory of Open Access Journals: DOAJ Articles PLoS ONE 9 3 e86464 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Salvatore Cerchio Samantha Strindberg Tim Collins Chanda Bennett Howard Rosenbaum Seismic surveys negatively affect humpback whale singing activity off northern Angola. |
topic_facet |
Medicine R Science Q |
description |
Passive acoustic monitoring was used to document the presence of singing humpback whales off the coast of Northern Angola, and opportunistically test for the effect of seismic survey activity in the vicinity on the number of singing whales. Two Marine Autonomous Recording Units (MARUs) were deployed between March and December 2008 in the offshore environment. Song was first heard in mid June and continued through the remaining duration of the study. Seismic survey activity was heard regularly during two separate periods, consistently throughout July and intermittently in mid-October/November. Numbers of singers were counted during the first ten minutes of every hour for the period from 24 May to 1 December, and Generalized Additive Mixed Models (GAMMs) were used to assess the effect of survey day (seasonality), hour (diel variation), moon phase and received levels of seismic survey pulses (measured from a single pulse during each ten-minute sampled period) on singer number. Application of GAMMs indicated significant seasonal variation, which was the most pronounced effect when assessing the full dataset across the entire season (p<0.001); however seasonality almost entirely dropped out of top-ranked models when applied to a reduced dataset during the July period of seismic survey activity. Diel variation was significant in both the full and reduced datasets (from p<0.01 to p<0.05) and often included in the top-ranked models. The number of singers significantly decreased with increasing received level of seismic survey pulses (from p<0.01 to p<0.05); this explanatory variable was included among the top ranked models for one MARU in the full dataset and both MARUs in the reduced dataset. This suggests that the breeding display of humpback whales is disrupted by seismic survey activity, and thus merits further attention and study, and potentially conservation action in the case of sensitive breeding populations. |
format |
Article in Journal/Newspaper |
author |
Salvatore Cerchio Samantha Strindberg Tim Collins Chanda Bennett Howard Rosenbaum |
author_facet |
Salvatore Cerchio Samantha Strindberg Tim Collins Chanda Bennett Howard Rosenbaum |
author_sort |
Salvatore Cerchio |
title |
Seismic surveys negatively affect humpback whale singing activity off northern Angola. |
title_short |
Seismic surveys negatively affect humpback whale singing activity off northern Angola. |
title_full |
Seismic surveys negatively affect humpback whale singing activity off northern Angola. |
title_fullStr |
Seismic surveys negatively affect humpback whale singing activity off northern Angola. |
title_full_unstemmed |
Seismic surveys negatively affect humpback whale singing activity off northern Angola. |
title_sort |
seismic surveys negatively affect humpback whale singing activity off northern angola. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0086464 https://doaj.org/article/a37a414e51b94d6d800bebb909b44b21 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
PLoS ONE, Vol 9, Iss 3, p e86464 (2014) |
op_relation |
https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24618836/?tool=EBI https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0086464 https://doaj.org/article/a37a414e51b94d6d800bebb909b44b21 |
op_doi |
https://doi.org/10.1371/journal.pone.0086464 |
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PLoS ONE |
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9 |
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