The Social Role of Vocal Complexity in Striped Dolphins

Papale, Elena; Fanizza, Carmelo; Buscaino, Giuseppa; Ceraulo, María; Cipriano, Giulia; Crugliano, Roberto; Grammauta, Rosario; Gregorietti, Martina; Renò, Vito; Ricci, Pasquale; Santacesaria, Francesca Cornelia; Maglietta, Rosalia; Carlucci, Roberto

doi:10.3389/fmars.2020.584301

Cited by 25 publications

(12 citation statements)

References 102 publications

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“…Wang et al 10.3389/fmars.2022.915668 The variations in the three pulsed signal train types produced by Indo-Pacific humpback dolphins may allow more information to be encoded (Martin et al, 2018;Madsen et al, 2004a;Moore and Pawloski, 1990;Au, 1993;Li et al, 2013). Variations in sounds play key roles in social behavior, and studies have shown that changes in the acoustic parameters of clicks and burst-pulses emitted by striped dolphins are associated with the active environment and objective (Jarvis et al, 2013;Papale et al, 2020). Pulsed signal trains with longer IPIs and large D values can help dolphins to search, detect, and select targets (Madsen et al, 2004b).…”

Section: Discussionmentioning

confidence: 99%

Three types of pulsed signal trains emitted by Indo-Pacific humpback dolphins (Sousa chinensis) in Beibu Gulf, South China Sea

et al. 2022

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Pulsed signal trains comprising clicks, buzzes, and burst-pulses play important roles in the life activities of odontocetes, but they have not been distinguished in Indo-Pacific humpback dolphins. Underwater vocalizations of this species were recorded from 27 September to 2 October 2019 in the Beibu Gulf, South China Sea. Pulsed signal trains were detected with variations in the pulsed signal number (range of 6–76), mean inter-pulse interval (IPIs_m: 0.1–315 ms), and mean duration (D ranged from tens to thousands of milliseconds). Principal component analysis and hierarchical cluster analysis based on six acoustic parameters in the pulsed signal trains identified three categories of trains designated as clicks, burst-pulses, and buzzes. Buzzes and burst-pulses (different from those described in previous research) were detected for the first time in Indo-Pacific humpback dolphins in China. The results indicated that the IPIs_m was longest for clicks but shortest for buzzes, and the D values were longer for both clicks and burst-pulses than buzzes. The three train types could be identified based on the IPIs_m, with threshold values of 4.9 and 15.5 ms. The significant variations in the three vocalization types were related to surface behaviors, and buzzes could have a special function in foraging by this species, thereby requiring further research. These findings may facilitate future quantitative evaluations of the echolocation performance in wild Indo-Pacific humpback dolphins and provide important guidance regarding acoustic observations and the identification of this species.

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Section: Discussionmentioning

confidence: 99%

Three types of pulsed signal trains emitted by Indo-Pacific humpback dolphins (Sousa chinensis) in Beibu Gulf, South China Sea

et al. 2022

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“…The Gulf of Taranto (Fig. 1 ) hosts several species of cetaceans and sea turtles; in particular, the striped dolphin is the most frequent and abundant species, followed by the common bottlenose dolphin ( Tursiops truncatus ), the Risso’s dolphin and the sperm whale ( Physeter macrocephalus ) (Carlucci et al 2014 ; Renò et al 2019 ; Azzolin et al 2020 ; Carlucci et al 2020 ; Maglietta et al 2020 ; Papale et al 2020 ). Concerning the sea turtles, the most frequent species in the basin is the loggerhead sea turtle, followed by the occasionally seen green and leatherback sea turtles ( Dermochelys coriacea ) (Casale et al 2018 ; Pierri et al 2019 ).…”

Section: Methodsmentioning

confidence: 99%

Dolphins and sea turtles may host zoonotic parasites and pathogenic bacteria as indicators of anthropic pressure in the Gulf of Taranto (Northern Ionian Sea, Central-Eastern Mediterranean Sea)

et al. 2022

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The occurrence of protozoan parasites Giardia duodenalis and Cryptosporidium spp. such as the pathogenic bacteria Salmonella spp. and Escherichia coli was molecularly investigated in the following free ranging species of striped dolphins (Stenella coeruleoalba), Risso’s dolphins (Grampus griseus) as well as loggerhead (Caretta caretta) and green (Chelonia mydas) sea turtles living in the Gulf of Taranto (Mediterranean Sea). Out of forty-one investigated individuals belonging to the 4 species, 13 (31.7%) were positive to one or more pathogens and zoonotic G. duodenalis assemblage A, Cryptosporidium parvum and S. enterica were identified in striped dolphins, loggerhead and green sea turtles. In this work, the presence of these opportunistic pathogens has been investigated in fecal samples of free ranging dolphin and sea turtle species for the first time. Moreover, this is the first record of C. parvum in loggerhead sea turtles. These results may provide baseline data for the potential role of cetaceans and sea turtles as potential sentinel species for zoonotic and terrestrial pathogens in the marine environment.

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“…Moreover, the study area has been widely recognized as a critical area for the day-to-day life of striped dolphin Stenella coeruleoalba and common bottlenose Tursiops truncatus (Carlucci et al, 2016a;Carlucci et al, 2017;Carlucci et al, 2018b;Ciccarese et al, 2019;Santacesaria et al, 2019;Azzolin et al, 2020). In particular, the spatial distribution and areas where these dolphins realize feeding, resting, socializing, and traveling activities have been identified (Carlucci et al, 2018b;Papale et al, 2020). In addition, other cetacean species occur in the NIS, such as the Risso's dolphin (Grampus griseus, Maglietta et al, 2020;Maglietta et al, 2022;Maglietta et al, 2018;Carlucci et al, 2020a), the sperm whale (Physeter macrocephalus, Bellomo et al, 2019), the Cuvier's beaked whale (Ziphius cavirostris, Podestà et al, 2016;Carlucci et al, 2020b) and the fin whale (Balaenoptera physalus, Dimatteo et al, 2011;Fanizza et al, 2014).…”

Section: Study Areamentioning

confidence: 99%

Application of a multi-species bio-economic modelling approach to explore fishing traits within eligible cetacean conservation areas in the Northern Ionian Sea (Central Mediterranean Sea)

Carlucci

Cipriano²,

Cascione³

et al. 2022

Front. Mar. Sci.

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The assessment of the spatial overlap between eligible cetacean conservation areas (CCAs) and fishing grounds could be a strategic element in the implementation of effective conservation measures in the pelagic offshore areas. A multi-species bio-economic modelling approach has been applied to estimate the fishing traits in eligible CCAs in the Northern Ionian Sea (NIS, Central Mediterranean Sea) between 10-800 m of depth, adopting the Spatial MAnagement of demersal Resources for Trawl fisheries model (SMART). Four possible CCAs were defined according to the distribution of cetacean species, their bio-ecological needs, as well as socio-economic needs of human activities, identifying a Blue, Red, Orange and Green CCAs in the NIS. SMART spatial domain was a grid with 500 square cells (15×15 NM). The analysis was conducted for the period 2016-2019, considering the Otter Trawl Bottom (OTB) fleet activities in the study areas through the Vessel Monitoring System. The spatial extension of fishing activities, hourly fishing effort (h), landings (tons) and economic value (euros) for each CCA and the NIS were estimated as yearly median values. Fishing activities were absent in the Blue CCA, where the presence of the submarine canyon head does not offer accessible fishing grounds. The hourly fishing effort in the Green area accounted for about 22% (3443 h) of the total hourly effort of the NIS, while the Orange and Red areas were about 8% (1226 h) and 2% (295 h), respectively. The Green CCA corresponded to about 14% (36 tons) of the total landings in the NIS, whereas the Orange and Red areas represented about 9% (22 tons) and 6% (16 tons), respectively. The Green CCA accounted for about 13% (156 thousand euros) of the total economic value of the NIS, while the Orange and Red areas represented about 6% (69 thousand euros) and 4% (44thousand euros), respectively. Results showed no or negligible negative effects on trawl activities by potential spatial restrictions due to the establishment of CCAs highlighting the importance to consider spatially integrated information during the establishment process of conservation areas for cetacean biodiversity according to the principles of Ecosystem Based Management.

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The Social Role of Vocal Complexity in Striped Dolphins

Cited by 25 publications

References 102 publications

Three types of pulsed signal trains emitted by Indo-Pacific humpback dolphins (Sousa chinensis) in Beibu Gulf, South China Sea

Three types of pulsed signal trains emitted by Indo-Pacific humpback dolphins (Sousa chinensis) in Beibu Gulf, South China Sea

Dolphins and sea turtles may host zoonotic parasites and pathogenic bacteria as indicators of anthropic pressure in the Gulf of Taranto (Northern Ionian Sea, Central-Eastern Mediterranean Sea)

Application of a multi-species bio-economic modelling approach to explore fishing traits within eligible cetacean conservation areas in the Northern Ionian Sea (Central Mediterranean Sea)

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