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Effects of Pile Driving on the Residency and Movement of Tagged Reef Fish

View Article: PubMed Central - PubMed

ABSTRACT

The potential effects of pile driving on fish populations and commercial fisheries have received significant attention given the prevalence of pile driving occurring in coastal habitats throughout the world. Behavioral impacts of sound generated from these activities on fish typically have a greater area of influence than physical injury, and may therefore adversely affect a greater portion of the local population. This study used acoustic telemetry to assess the movement, residency, and survival of 15 sheepshead (Archosargus probatocephalus) and 10 grey snapper (Lutjanus griseus) in Port Canaveral, Florida, USA, in response to 35 days of pile driving at a wharf complex. No obvious signs of mortality or injury to tagged fish were evident from the data. Received sound pressure levels from pile strikes on the interior of the wharf, where reef fish primarily occur, were on average 152–157 dB re 1 μPa (peak). No significant decrease in sheepshead daytime residency was observed during pile driving within the central portion of the wharf and area of highest sound exposure, and no major indicators of displacement from the exposure wharf with the onset of pile driving were observed. There was evidence of potential displacement from the exposure wharf that coincided with the start of pile driving observed for 2 out of 4 grey snapper, along with a decrease in daytime residency for a subset of this species with high site fidelity prior to the event. Results indicate that snapper may be more likely to depart an area of pile driving disturbance more readily than sheepshead, but were less at risk for behavioral impact given the lower site fidelity of this species.

No MeSH data available.


Daytime residency index (daytime hours only).Residency index is shown for sheepshead (top) and grey snapper (bottom) during the periods pre- (diagonal lines), during- (open), and post-pile driving (cross-hatched) for the three individual receivers at each wharf and the wharfs as a whole. Lines represent the median, boxes indicate the 25th and 75th interquartile range, whiskers extend to data within 1.5 times the interquartile range, and circles indicate outliers. Asterisk indicates significance at p<0.01.
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pone.0163638.g005: Daytime residency index (daytime hours only).Residency index is shown for sheepshead (top) and grey snapper (bottom) during the periods pre- (diagonal lines), during- (open), and post-pile driving (cross-hatched) for the three individual receivers at each wharf and the wharfs as a whole. Lines represent the median, boxes indicate the 25th and 75th interquartile range, whiskers extend to data within 1.5 times the interquartile range, and circles indicate outliers. Asterisk indicates significance at p<0.01.

Mentions: Prior to pile driving, 11 of 15 sheepshead tagged at the exposure wharf were considered to have high site fidelity (daytime RI > 0.5) to the wharf, with seven of those fish also showing high site fidelity to the central portion of the wharf (E4). High site fidelity to the exposure wharf prior to pile driving was observed in only four out of 10 snapper, although none of these fish exhibited high site fidelity to the central portion of the wharf (E4). There were significant differences in daytime RI for sheepshead among time periods in the exposure wharf on receiver E4 (H = 8.44, df = 2, P = 0.02), while comparisons for the other receivers were non-significant (Fig 5). Only the pre-post pile driving reduction in RI for sheepshead at E4 was significant in post hoc analysis (z = -2.55, n = 15, P = <0.01). There were significant differences among time periods in the exposure wharf for grey snapper (H = 13.5, df = 2, P = <0.01), as the median RI decreased pre-post-pile driving on E5 (0.11 to zero), E4 (0.11 to zero), and the exposure wharf (0.38 to zero). Additionally, there was a notable decrease in daytime RI values in all four snapper with high site fidelity prior to pile driving, with three of these fish exhibiting daytime RI values of 0.0–0.03 during pile driving. However, none of the differences were significant in post-hoc analysis. Only one snapper was detected in the pre and post period at receiver E3.


Effects of Pile Driving on the Residency and Movement of Tagged Reef Fish
Daytime residency index (daytime hours only).Residency index is shown for sheepshead (top) and grey snapper (bottom) during the periods pre- (diagonal lines), during- (open), and post-pile driving (cross-hatched) for the three individual receivers at each wharf and the wharfs as a whole. Lines represent the median, boxes indicate the 25th and 75th interquartile range, whiskers extend to data within 1.5 times the interquartile range, and circles indicate outliers. Asterisk indicates significance at p<0.01.
© Copyright Policy
Related In: Results  -  Collection

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Show All Figures
getmorefigures.php?uid=PMC5120787&req=5

pone.0163638.g005: Daytime residency index (daytime hours only).Residency index is shown for sheepshead (top) and grey snapper (bottom) during the periods pre- (diagonal lines), during- (open), and post-pile driving (cross-hatched) for the three individual receivers at each wharf and the wharfs as a whole. Lines represent the median, boxes indicate the 25th and 75th interquartile range, whiskers extend to data within 1.5 times the interquartile range, and circles indicate outliers. Asterisk indicates significance at p<0.01.
Mentions: Prior to pile driving, 11 of 15 sheepshead tagged at the exposure wharf were considered to have high site fidelity (daytime RI > 0.5) to the wharf, with seven of those fish also showing high site fidelity to the central portion of the wharf (E4). High site fidelity to the exposure wharf prior to pile driving was observed in only four out of 10 snapper, although none of these fish exhibited high site fidelity to the central portion of the wharf (E4). There were significant differences in daytime RI for sheepshead among time periods in the exposure wharf on receiver E4 (H = 8.44, df = 2, P = 0.02), while comparisons for the other receivers were non-significant (Fig 5). Only the pre-post pile driving reduction in RI for sheepshead at E4 was significant in post hoc analysis (z = -2.55, n = 15, P = <0.01). There were significant differences among time periods in the exposure wharf for grey snapper (H = 13.5, df = 2, P = <0.01), as the median RI decreased pre-post-pile driving on E5 (0.11 to zero), E4 (0.11 to zero), and the exposure wharf (0.38 to zero). Additionally, there was a notable decrease in daytime RI values in all four snapper with high site fidelity prior to pile driving, with three of these fish exhibiting daytime RI values of 0.0–0.03 during pile driving. However, none of the differences were significant in post-hoc analysis. Only one snapper was detected in the pre and post period at receiver E3.

View Article: PubMed Central - PubMed

ABSTRACT

The potential effects of pile driving on fish populations and commercial fisheries have received significant attention given the prevalence of pile driving occurring in coastal habitats throughout the world. Behavioral impacts of sound generated from these activities on fish typically have a greater area of influence than physical injury, and may therefore adversely affect a greater portion of the local population. This study used acoustic telemetry to assess the movement, residency, and survival of 15 sheepshead (Archosargus probatocephalus) and 10 grey snapper (Lutjanus griseus) in Port Canaveral, Florida, USA, in response to 35 days of pile driving at a wharf complex. No obvious signs of mortality or injury to tagged fish were evident from the data. Received sound pressure levels from pile strikes on the interior of the wharf, where reef fish primarily occur, were on average 152&ndash;157 dB re 1 &mu;Pa (peak). No significant decrease in sheepshead daytime residency was observed during pile driving within the central portion of the wharf and area of highest sound exposure, and no major indicators of displacement from the exposure wharf with the onset of pile driving were observed. There was evidence of potential displacement from the exposure wharf that coincided with the start of pile driving observed for 2 out of 4 grey snapper, along with a decrease in daytime residency for a subset of this species with high site fidelity prior to the event. Results indicate that snapper may be more likely to depart an area of pile driving disturbance more readily than sheepshead, but were less at risk for behavioral impact given the lower site fidelity of this species.

No MeSH data available.