Feeding Habits of Indo-Pacific Humpback Dolphins (&lt;I&gt;Sousa chinensis&lt;/I&gt;) Stranded in Hong Kong

Barros, Nélio B.; Jefferson, Thomas A.; Parsons, E. C. M.

doi:10.1578/am.30.1.2004.179

Cited by 111 publications

(136 citation statements)

References 16 publications

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“…The humpback dolphin appears to rely almost exclusively on fish for food (Barros et al 2004 Trichiuridae (cutlassfish), Clupeidae (sardines), Ariidae (sea catfish) and Mugilidae (mullets) (Barros et al 2004;Parra & Jedensjö 2014). Notably, the majority of these species are soniferous fishes (Banner 1972;Fish & Mowbray 1970;Ren et al 2007;Whitehead & Blaxter 1989).…”

Section: Passive Hearing By the Dolphinmentioning

confidence: 99%

Diversity of fish sound types in the Pearl River Estuary, China

Wang

Nowacek

Akamatsu

et al. 2017

Preprint

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Background. Repetitive species-specific sound enables the identification of the presence and behavior of soniferous species by acoustic means. Passive acoustic monitoring has been widely applied to monitor the spatial and temporal occurrence and behavior of calling species. Methods. Underwater biological sounds in the Pearl River Estuary, China, were collected using passive acoustic monitoring, with special attention paid to fish sounds. A total of 1408 suspected fish calls comprising 18,942 pulses were qualitatively analyzed using a customized acoustic analysis routine. Results. We identified a diversity of 66 types of fish sounds. In addition to single pulse, the sounds tended to have a pulse train structure. The pulses were characterized by an approximate 8 ms duration, with a peak frequency from 500 to 2600 Hz and a majority of the energy below 4000 Hz. The median inter-pulsepeak interval (IPPI) of most call types was 9 or 10 ms. Most call types with median IPPIs of 9 ms and 10 ms were observed at times that were exclusive from each other, suggesting that they might be produced by different species. According to the literature, the two section signal types of 1+1 and 1+N 10 might belong to big-snout croaker (Johnius macrorhynus), and 1+N 19 might be produced by Belanger's croaker (J. belangerii).Discussion. Categorization of the baseline ambient biological sound is an important first step in mapping the spatial and temporal patterns of soniferous fishes. The next step is the identification of the species producing each sound. The distribution pattern of soniferous fishes will be helpful for the protection and management of local fishery resources and in marine environmental impact assessment. Since the local vulnerable Indo-Pacific humpback dolphin (Sousa chinensis) mainly preys on soniferous fishes, the fine-scale distribution pattern of soniferous fishes can aid in the conservation of this species.Additionally, prey and predator relationships can be observed when a database of species- AbstractBackground. Repetitive species-specific sound enables the identification of the presence and behavior of

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Section: Passive Hearing By the Dolphinmentioning

confidence: 99%

Diversity of fish sound types in the Pearl River Estuary, China

Wang

Nowacek

Akamatsu

et al. 2017

Preprint

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“…), the lionhead (Collichthys lucida) and anchovies (Thryssa spp. ), and these fish species generally occur in estuarine waters of less than 30 metres deep (Barros et al 2004). In the wet season with warmer water temperature, these fish species tend to enter the shallower waters (less than 10 metres deep), whereas they move into deeper waters during the dry season (Chen and Liu 1982).…”

mentioning

confidence: 99%

Distribution and group dynamics of Indo-Pacific humpback dolphins (Sousa chinensis) in the western Pearl River Estuary, China

Chen¹,

Qiu²,

Jia³

et al. 2011

Mammalian Biology

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“…Humpback dolphins are known to feed on a wide variety of estuarine fish. Important prey includes bottom-dwelling species including catfish, sciaenid and croakers (Barros et al 2004). Catfish possess serrated spines composed of dense bone tissue with the ability to harm and kill dolphins (Barros and Cockcroft 1999).…”

mentioning

confidence: 99%

Observations of an Indo-Pacific humpback dolphin carrying a sponge: object play or tool use?

Parra¹

2007

Mammalia

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Feeding Habits of Indo-Pacific Humpback Dolphins (<I>Sousa chinensis</I>) Stranded in Hong Kong

Cited by 111 publications

References 16 publications

Diversity of fish sound types in the Pearl River Estuary, China

Diversity of fish sound types in the Pearl River Estuary, China

Distribution and group dynamics of Indo-Pacific humpback dolphins (Sousa chinensis) in the western Pearl River Estuary, China

Observations of an Indo-Pacific humpback dolphin carrying a sponge: object play or tool use?

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