An adaptive bottlenose dolphin foraging tactic, “shipside feeding,” using container ships in an urban estuarine environment

Weinpress‐Galipeau, Meghan; Baker, H. R.; Roumillat, Bill; Fair, Patricia A.

doi:10.1111/mms.12806

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Studies in the Shannon Estuary, Ireland, and the Swan-Canning Rivers estuary, Australia, also showed that bottlenose dolphins ( Tursiops truncatus and Tursiops aduncus , respectively) used heavily trafficked recreation and shipping areas [ 141 , 142 ]. In fact, bottlenose dolphins in Charleston Harbor have displayed “shipside feeding” where these animals use the side of docked commercial ships to trap fish [ 143 ]. Because most bottlenose dolphin vocalizations occur at higher frequencies (typically recorded above 7 kHz in this study), it is possible their acoustic signals are disrupted more by recreational boats that produce high frequency noise as compared to commercial ships that primarily produce lower frequency noise at slower speeds [ 129 , 133 , 144 ].…”

Section: Discussionmentioning

confidence: 99%

The Biological and Anthropogenic Soundscape of an Urbanized Port – the Charleston Harbor Estuary, South Carolina, USA

et al. 2023

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Soundscape ecology provides a long-term, noninvasive approach to track animal behavior, habitat quality, and community structure over temporal and spatial scales. Using soniferous species as an indicator, biological soundscapes provide information about species and ecosystem health as well as their response and resiliency to potential stressors such as noise pollution. Charleston Harbor, South Carolina, USA provides important estuarine habitat for an abundance of marine life and is one of the busiest and fastest growing container ports in the southeast USA. Six passive acoustic recorders were deployed in the Charleston Harbor from December 2017 to June 2019 to determine biological patterns and human-associated influences on the soundscape. Anthropogenic noise was detected frequently across the estuary, especially along the shipping channel. Despite this anthropogenic noise, biological sound patterns were identified including snapping shrimp snaps (Alpheus spp. and Synalpheus spp.), fish calling and chorusing (Sciaenidae and Batrachoididae families), and bottlenose dolphin vocalizations. Biological response to anthropogenic activity varied among trophic levels, with decreased detection of fish calling when anthropogenic noise occurred and increased dolphin vocalizations in the presence of anthropogenic noise. Statistically, fine-scale, temporal patterns in biological sound were not clearly identified by sound pressure levels (SPLs), until files with anthropogenic noise presence were removed. These findings indicate that SPL patterns may be limited in their interpretation of biological activity for noisy regions and that the overall acoustic signature that we find in more pristine estuaries is lost in Charleston Harbor.

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Section: Discussionmentioning

confidence: 99%

The Biological and Anthropogenic Soundscape of an Urbanized Port – the Charleston Harbor Estuary, South Carolina, USA

et al. 2023

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“…The use of non‐natural barriers to herd prey can be mainly observed in coastal odontocetes whose habitat and resource use inherently overlap with human activities. Populations of bottlenose dolphins ( Tursiops truncatus ), for example, can trap prey fish against gill nets on commercial fishing boats (Cox et al, 2004), stationary fishing nets (Bel'kovich et al, 1991), underwater walls of manmade channels (Ronje et al, 2018), and along the side of large commercial shipping vessels (i.e., “shipside feeding”; Weinpress‐Galipeau et al, 2021). In southern Brazil, a subset of the resident populations of Lahille's bottlenose dolphin ( T .…”

Section: Introductionmentioning

confidence: 99%

Guiana dolphins use mangrove margins as a natural barrier to chase fish prey

Pierry,

Morete,

Monteiro‐Filho

et al. 2023

Ethology

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The behavioral plasticity among and within cetacean species can be driven by their prey sources, local adaptations to environmental features, and/or interactions with human activities. One of the tactics displayed by cetaceans is the barrier feeding, in which individuals or groups herd fish schools against natural and non‐natural barriers to restrict movements of their prey. Coastal odontocetes, for example, are known for using shorelines and underwater slopes to trap their prey. Here, we documented two distinct populations of Guiana dolphin using the mangrove margins as a natural barrier to herd and capture fish. The observations took place in the Cananéia estuary, São Paulo State, southeastern Brazil, and in the Paranaguá estuary, Paraná State, southern Brazil. A total of 63 dolphins over eight encounters were observed performing six different events using mangroves as a natural barrier, summing both study areas. These findings not only expand our understanding of the behavior plasticity of the species but also call attention to the importance of the mangrove ecosystem directly to Guiana dolphins and indirectly to the components of their food web.

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Bottlenose dolphin predation on flathead grey mullets using barrier feeding techniques: a visual and acoustic case study in the Mediterranean Sea

Pace,

Pedrazzi

2024

Ethology Ecology & Evolution

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An adaptive bottlenose dolphin foraging tactic, “shipside feeding,” using container ships in an urban estuarine environment

Cited by 4 publications

References 19 publications

The Biological and Anthropogenic Soundscape of an Urbanized Port – the Charleston Harbor Estuary, South Carolina, USA

The Biological and Anthropogenic Soundscape of an Urbanized Port – the Charleston Harbor Estuary, South Carolina, USA

Guiana dolphins use mangrove margins as a natural barrier to chase fish prey

Bottlenose dolphin predation on flathead grey mullets using barrier feeding techniques: a visual and acoustic case study in the Mediterranean Sea

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