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  • 1
    Online Resource
    Online Resource
    An Indo-Pacific Humpback Dolphin Genome Reveals Insights into Chromosome Evolution and the Demography of a Vulnerable Species
    Elsevier BV ; 2020
    In:  iScience Vol. 23, No. 10 ( 2020-10), p. 101640-
    Details
    In: iScience, Elsevier BV, Vol. 23, No. 10 ( 2020-10), p. 101640-
    Type of Medium: Online Resource
    ISSN: 2589-0042
    URL: Article
    DOI: 10.1016/j.isci.2020.101640
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 2927064-9
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  • 2
    Online Resource
    Online Resource
    Genome Sequence of the Freshwater Yangtze Finless Porpoise
    MDPI AG ; 2018
    In:  Genes Vol. 9, No. 4 ( 2018-04-16), p. 213-
    Details
    In: Genes, MDPI AG, Vol. 9, No. 4 ( 2018-04-16), p. 213-
    Abstract: The Yangtze finless porpoise (Neophocaena asiaeorientalis ssp. asiaeorientalis) is a subspecies of the narrow-ridged finless porpoise (N. asiaeorientalis). In total, 714.28 gigabases (Gb) of raw reads were generated by whole-genome sequencing of the Yangtze finless porpoise, using an Illumina HiSeq 2000 platform. After filtering the low-quality and duplicated reads, we assembled a draft genome of 2.22 Gb, with contig N50 and scaffold N50 values of 46.69 kilobases (kb) and 1.71 megabases (Mb), respectively. We identified 887.63 Mb of repetitive sequences and predicted 18,479 protein-coding genes in the assembled genome. The phylogenetic tree showed a relationship between the Yangtze finless porpoise and the Yangtze River dolphin, which diverged approximately 20.84 million years ago. In comparisons with the genomes of 10 other mammals, we detected 44 species-specific gene families, 164 expanded gene families, and 313 positively selected genes in the Yangtze finless porpoise genome. The assembled genome sequence and underlying sequence data are available at the National Center for Biotechnology Information under BioProject accession number PRJNA433603.
    Type of Medium: Online Resource
    ISSN: 2073-4425
    URL: Article
    DOI: 10.3390/genes9040213
    Language: English
    Publisher: MDPI AG
    Publication Date: 2018
    detail.hit.zdb_id: 2527218-4
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  • 3
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    Online Resource
    A genome and single‐nucleus cerebral cortex transcriptome atlas of the short‐finned pilot whale Globicephala macrorhynchus
    Wiley ; 2023
    In:  Molecular Ecology Resources Vol. 23, No. 5 ( 2023-07), p. 1108-1123
    Details
    In: Molecular Ecology Resources, Wiley, Vol. 23, No. 5 ( 2023-07), p. 1108-1123
    Abstract: Cetaceans (dolphins, whales, and porpoises) have large and anatomically sophisticated brains. To expand our understanding of the cellular makeup of cetacean brains and the similarities and divergence between the brains of cetaceans and terrestrial mammals, we report a short‐finned pilot whale ( Globicephala macrorhynchus ) single‐nucleus transcriptome atlas. To achieve this goal, we assembled a chromosome‐scale reference genome spanning 2.25 Gb on 22 chromosomes and profiled the gene expression of five major anatomical cortical regions of the short‐finned pilot whale by single‐nucleus RNA‐sequencing (snRNA‐seq). We identified six major cell lineages in the cerebral cortex (excitatory neurons, inhibitory neurons, oligodendrocytes, oligodendrocyte precursor cells, astrocytes, and endothelial cells), eight molecularly distinct subclusters of excitatory neurons, and four subclusters of inhibitory neurons. Finally, a comparison of snRNA‐seq data from the short‐finned pilot whale, human, and rhesus macaque revealed a broadly conserved cellular makeup of brain cell types. Our study provides genomic resources and molecular insights into cetacean brain evolution.
    Type of Medium: Online Resource
    ISSN: 1755-098X , 1755-0998
    URL: Issue
    URL: Article
    DOI: 10.1111/men.v23.5
    DOI: 10.1111/1755-0998.13775
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2406833-0
    detail.hit.zdb_id: 2406816-0
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Modeling intraspecific variation in habitat utilization of the Indo-Pacific humpback dolphin using self-organizing map
    Elsevier BV ; 2022
    In:  Ecological Indicators Vol. 144 ( 2022-11), p. 109466-
    Details
    In: Ecological Indicators, Elsevier BV, Vol. 144 ( 2022-11), p. 109466-
    Type of Medium: Online Resource
    ISSN: 1470-160X
    URL: Article
    DOI: 10.1016/j.ecolind.2022.109466
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2036774-0
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  • 5
    Online Resource
    Online Resource
    Passive acoustic survey of Yangtze finless porpoises using a cargo ship as a moving platform
    Acoustical Society of America (ASA) ; 2011
    In:  The Journal of the Acoustical Society of America Vol. 130, No. 4 ( 2011-10-01), p. 2285-2292
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 130, No. 4 ( 2011-10-01), p. 2285-2292
    Abstract: In order to periodically investigate the population and distribution of the Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis) in its main distribution range in the Yangtze River, a passive acoustic system deployed on a cargo ship as a moving platform, rather than a dedicated research ship, was developed. A stereo acoustic event data-logger (A-tag) was installed on the cargo ship to passively detect phonating animals. In three surveys carried out in the Yangtze River from Wuhan to Shanghai, an average of 6059 clicks in each survey and 284 porpoises in total were acoustically detected along an 1100-km stretch. The animals were detected frequently in most of the survey range except two “gap sections” with 40 and 60 km lengths, respectively, where no animals were detected in all three surveys. Detected group sizes of the animals in each 120-s time window were not significantly different among the surveys, but the distribution pattern was different and suggested seasonal migration. The cargo ship based passive acoustic survey was effective in detecting phonating animals and can potentially monitor the distribution and population trend over time. Compared to surveys that used dedicated research ships, the present method is more cost effective.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.3625257
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2011
    detail.hit.zdb_id: 1461063-2
    detail.hit.zdb_id: 219231-7
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  • 6
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    Online Resource
    Influence of acoustic habitat variation on Indo-Pacific humpback dolphin ( Sousa chinensis ) in shallow waters of Hainan Island, China
    Acoustical Society of America (ASA) ; 2020
    In:  The Journal of the Acoustical Society of America Vol. 147, No. 6 ( 2020-06-01), p. 3871-3882
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 147, No. 6 ( 2020-06-01), p. 3871-3882
    Abstract: The Indo-Pacific humpback dolphin (IPHD, Sousa chinensis) is a coastal species inhabiting tropical and warm-temperate waters. The presence of this vulnerable dolphin was recently discovered in shallow waters southwest of Hainan Island, China. The influence of the acoustic habitat on the distribution and behavior of IPHD was investigated using an array of passive acoustic platforms (n = 6) that spanned more than 100 km of coastline during a 75-day monitoring period. Its presence was assessed within 19 215 five-min recordings by classifying echolocation clicks using machine learning techniques. Spectrogram analysis was applied to further investigate the acoustic behavior of IPHD and to identify other prominent sound sources. The variation in the ambient noise levels was also measured to describe the spatiotemporal patterns of the acoustic habitat among the different sampling sites. Social and feeding sounds of IPHD (whistles and click-series of pulsed sounds) were identified together with other biological sources (finless porpoise, soniferous fishes, and snapping shrimps) and anthropogenic activities (ship noise, explosions, and sonars). Distribution, acoustic behavior, and habitat use of this nearshore dolphin species were strongly influenced by the abundance of soniferous fishes, and under similar conditions, the species was more acoustically active in locations with lower noise levels.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/10.0001384
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2020
    detail.hit.zdb_id: 1461063-2
    detail.hit.zdb_id: 219231-7
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  • 7
    Online Resource
    Online Resource
    Finding baiji and freshwater finless porpoises in the Yangtze River, China
    Acoustical Society of America (ASA) ; 2011
    In:  The Journal of the Acoustical Society of America Vol. 130, No. 4_Supplement ( 2011-10-01), p. 2459-2459
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 130, No. 4_Supplement ( 2011-10-01), p. 2459-2459
    Abstract: A stereo passive acoustic event recorder (A-tag) has been applied for range-wide monitoring of baiji and finless porpoises in China. As the pilot study, two research vessels were operated in 1700 km historic habitat of both species from Yichang to Shanghai in 2006. There was no detection of baiji, but 204 and 199 porpoises were counted acoustically by two vessels, respectively. In order to investigate the population trends of cetaceans, periodical survey is necessary. We installed A-tag on the cargo ship, which was operated 1100 km in the river once every month. An average of 6059 clicks and 95 porpoises were acoustically detected in each survey. Detected group sizes of the animals in 120-s time window were not significantly different among the surveys, but the distribution pattern suggested seasonal migration. The animals were detected in most of the survey range except two gap sections with 40 and 60 km lengths, down from Wuhan and Nanjing cities, respectively, where no animals were detected in the first three surveys. Fragmentation of population by anthropological factors was concerned. The cargo ship based passive acoustic survey was effective to monitor the distribution and population trend over time.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.3654878
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2011
    detail.hit.zdb_id: 1461063-2
    detail.hit.zdb_id: 219231-7
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  • 8
    Online Resource
    Online Resource
    Whistles emitted by Indo-Pacific humpback dolphins ( Sousa chinensis ) in Zhanjiang waters, China
    Acoustical Society of America (ASA) ; 2019
    In:  The Journal of the Acoustical Society of America Vol. 145, No. 6 ( 2019-06-01), p. 3289-3298
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 145, No. 6 ( 2019-06-01), p. 3289-3298
    Abstract: Whistles emitted by Indo-Pacific humpback dolphins in Zhanjiang waters, China, were collected by using autonomous acoustic recorders. A total of 529 whistles with clear contours and signal-to-noise ratio higher than 10 dB were extracted for analysis. The fundamental frequencies and durations of analyzed whistles were in ranges of 1785–21 675 Hz and 30–1973 ms, respectively. Six tonal types were identified: constant, downsweep, upsweep, concave, convex, and sine whistles. Constant type was the most dominant tonal type, accounting for 32.51% of all whistles, followed by sine type, accounting for 19.66% of all whistles. This paper examined 17 whistle parameters, which showed significant differences among the six tonal types. Whistles without inflections, gaps, and stairs accounted for 62.6%, 80.6%, and 68.6% of all whistles, respectively. Significant intraspecific differences in all duration and frequency parameters of dolphin whistles were found between this study and the study in Malaysia. Except for start frequency, maximum frequency and the number of harmonics, all whistle parameters showed significant differences between this study and the study conducted in Sanniang Bay, China. The intraspecific differences in vocalizations for this species may be related to macro-geographic and/or environmental variations among waters, suggesting a potential geographic isolation among populations of Indo-Pacific humpback dolphins.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5110304
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2019
    detail.hit.zdb_id: 1461063-2
    detail.hit.zdb_id: 219231-7
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  • 9
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    Online Resource
    Whistle characteristics of a newly recorded Indo‐Pacific humpback dolphin ( Sousa chinensis ) population in waters southwest of Hainan Island, China, differ from other humpback dolphin populations
    Wiley ; 2021
    In:  Marine Mammal Science Vol. 37, No. 4 ( 2021-10), p. 1341-1362
    Details
    In: Marine Mammal Science, Wiley, Vol. 37, No. 4 ( 2021-10), p. 1341-1362
    Abstract: Indo‐Pacific humpback dolphins ( Sousa chinensis ) use whistles to communicate with their conspecifics. Little is known about the acoustic repertoire of Indo‐Pacific humpback dolphins in waters southwest of Hainan Island, a newly recorded population in 2014. In this study, whistles of Hainan humpback dolphin population were collected by using autonomous acoustic recorders. The fundamental frequencies and durations of whistles were in ranges of 0.71–21.35 kHz and 0.06–2.22 s, respectively. Significant intraspecific differences in duration and frequency of whistles were found between the Hainan population and the other geographically neighboring populations (in Chinese waters) or the population in Malaysia waters. Compared with other Sousa species, significant interspecific differences were also observed. Based on clustering analysis, the whistle parameters of neighboring populations were likely similar to each other. Significant differences were found between humpback dolphins in waters southwest of Hainan Island and those dolphins in the neighboring areas, supporting the hypothesis that this population may be independent. Ambient noise measurements in waters of Hainan Island, Zhanjiang, and Sanniang Bay showed that humpback dolphin populations may use whistles with longer duration, lower frequency, and fewer inflection points for more effective communication to adapt to a noisier environment.
    Type of Medium: Online Resource
    ISSN: 0824-0469 , 1748-7692
    URL: Issue
    URL: Article
    DOI: 10.1111/mms.v37.4
    DOI: 10.1111/mms.12816
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 12787-5
    detail.hit.zdb_id: 2218018-7
    SSG: 12
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  • 10
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    Short‐finned pilot whales in the South China Sea: Insights into regional distribution, movement pattern, and habitat characteristics
    Wiley ; 2024
    In:  Marine Mammal Science Vol. 40, No. 1 ( 2024-01), p. 89-107
    Details
    In: Marine Mammal Science, Wiley, Vol. 40, No. 1 ( 2024-01), p. 89-107
    Abstract: Little scientific knowledge is available for short‐finned pilot whales in the South China Sea (SCS). Here, we integrated historical records, ship‐based observation, and satellite‐tagging data to investigate ecological and behavioral characteristics of pilot whales in the SCS. Historical records since the 1990s showed the widespread spatial occurrence of pilot whales along the coastal SCS, suggesting that the species may inhabit this region. During our dedicated ship‐based surveys (2019–2022) in the SCS, 19 groups of pilot whales were encountered in Xisha‐Zhongsha waters, which supported the hypothesis inferred from historical data. We believe that Xisha‐Zhongsha waters are important habitats for pilot whales, demonstrated by the large group size ( M  = 44.7 ± 42.4 SD individuals), the high proportion of recorded maternal groups (17/19), mixed‐species associations, and deep‐water habitat characteristics. During field surveys, we conducted satellite‐tagging experiments on two adult pilot whales, with tracking periods of 35 and 13 days, respectively. Satellite‐tracking data provided evidence of possible residency of the tagged whales, as both displayed overlapping ranges and nondirectional movement. This research provides preliminary baseline data on occurrence, distribution, movement, habitat use, and likely residency of pilot whales in the SCS, which can facilitate future research and conservation effort.
    Type of Medium: Online Resource
    ISSN: 0824-0469 , 1748-7692
    URL: Issue
    URL: Article
    DOI: 10.1111/mms.v40.1
    DOI: 10.1111/mms.13052
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 12787-5
    detail.hit.zdb_id: 2218018-7
    SSG: 12
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