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Temporal variation of the underwater soundscape in Jiaotou Bay,an Indo-Pacific humpback dolphin(Sousa chinensis)habitat off Hainan Island,China

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Integrative Zoology 2021年第4期16卷 477-498页

作者： Lijun DONG Jianchen DONG Francesco CARUSO Likun ZHAO Songhai LI marine mammal and marine bioacoustics laboratory Chinese Academy of SciencesInstitute of Deep-sea Science and EngineeringSanyaChina University of Chinese Academy of Sciences BeijingChina Tropical marine Science Institute National University of SingaporeSingapore Function laboratory for marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdaoChina

The underwater soundscape is an important ecological element affecting numerous aquatic animals,in particular dolphins,which must identify salient cues from ambient ocean *** this study,temporal variations in the soundscape of Jiaotou Bay were monitored from February 2016 to January 2017,where a population of Indo-Pacific humpback dolphins(Sousa chinensis)has recently been a regular *** autonomous acoustic recorder was deployed in shallow waters,and 1/3-octave band sound pressure levels(SPLs)were calculated with central frequencies ranging from 25 Hz to 40 kHz,then were grouped into 3 subdivided bands via cluster *** at each major band showed significant differences on a diel,fishing-related period,seasonal,and tidal phase *** noise generated by passing ships and underwater explosions were recorded in the study *** fish and dolphin acoustic activities both exhibited diel and seasonal variations,but no tidal cycle patterns.A negative significant relationship between anthropogenic sound detection rates and dolphin detection rates were observed,and fish detection rates showed no effect on dolphin detection rates,indicating anthropogenic activity avoidance and no forced foraging in dolphins in the study *** results provide fundamental insight into the acoustic dynamics of an important Indo-Pacific humpback dolphin habitat within a coastal area affected by a rapid increase in human activity,and demonstrate the need to protect animal habitat from anthropogenic noises.

关键词： acoustic monitoring anthropogenic noise dolphin detection rate sound pressure level temporal difference

First live sighting of Deraniyagala’s beaked whale(Mesoplodon hotaula)or ginkgo-toothed beaked whale(Mesoplodon ginkgodens)in the western Pacific(South China Sea)with preliminary data on coloration,natural markings,and surfacing patterns

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Integrative Zoology 2021年第4期16卷 451-461页

作者： Massimiliano ROSSO Mingli LIN Francesco CARUSO Mingming LIU Lijun DONG Anna BORRONI Wenzhi LIN Xiaoming TANG Alessandro BOCCONCELLI Songhai LI marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina CIMA Research Foundation SavonaItaly Woods Hole Oceanographic Institution Applied Ocean Physics and EngineeringWoods HoleMassachusettsUSA

Beaked whales represent around 25%of known extant cetacean species,yet they are the least known of all marine *** of many Mesoplodon species has relied on examination of a few stranded ***,the ginkgo-toothed beaked whale(Mesoplodon ginkgodens)and Deraniyagala’s beaked whale(Mesoplodon hotaula)are among the least-known of beaked whale species,without confirmed sightings of living individuals to *** present a sighting of 3 free-ranging individuals of ***/hotaula whale from a dedicated marine mammal vessel survey carried out in the South China Sea in April and May *** data(301 photographs)from the sighting were compared to photos of fresh stranded ginkgo-toothed beaked whale and Deraniyagala’s beaked whale from both historical and unpublished *** found that free-ranging *** and *** individuals can be easily distinguished from other Mesoplodon species due to differences in melon and gape shapes and coloration ***,accurate at-sea differentiation of *** and *** may not be possible due to high similarity in both coloration and scarring *** addition to our photo-identification data,we collected what we believe to be the first preliminary descriptions of surfacing behavior and diving patterns of one of these ***,the presence of scars possibly caused by fishing gear or marine litter raises concerns about anthropogenic impacts and conservation of these poorly known species.

关键词： Deraniyagala’s beaked whale ginkgo-toothed beaked whale marine litter Mesoplodon South China Sea

Potential impacts of shipping noise on Indo-Pacific humpback dolphins and implications for regulation and mitigation:a review

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Integrative Zoology 2018年第5期13卷 495-506页

作者： Songhai LI Mingming LIU Lijun DONG Jianchen DONG Ding WANG Sanya Key laboratory of marine mammal and marine bioacoustics Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina University of Chinese Academy of Sciences BeijingChina Key laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhanChina

Shipping noise is a widespread and relatively loud sound source among human-induced underwater *** impacts of shipping noise are of special concern for Indo-Pacific humpback dolphins(Sousa chinensis),as they inhabit shallow and nearshore habitats and are highly dependent on sound for *** study synthesizes our current understanding of the potential impacts of shipping noise on Indo-Pacific humpback dolphins combined with knowledge on sound production and hearing of these animals and the impacts of noise on other whales and *** further protection and management of Indo-Pacific humpback dolphins and their habitats,shipping noise should be regulated and mitigated to modify sound from ships,to reduce overall noise levels,and to set more marine protected areas(MPAs)covering most Indo-Pacific humpback dolphin habitats with seasonal and geographical restrictions to avoid ensonification of shipping *** emphasis for future research should be on obtaining more baseline information about the population distribution,sound production,hearing capabilities at the population level,behavior,and stress hormones of the humpback dolphins under different noise conditions or under different noise-producing activities,and/or in high-noise areas compared with relatively quiet areas,and the noise characteristics of ships of different types,sizes and speeds.

关键词： echolocation hearing noise impacts protection sound production

Prey decline leads to diet shift in the largest population of Indo-Pacific humpback dolphins?

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Integrative Zoology 2021年第4期16卷 548-574页

作者： Wenzhi LIN Leszek KARCZMARSKI Ruilian ZHOU Yaqian MO Lang GUO Sam King Fung YIU Xi NING Tak-Cheung WAI Yuping WU School of marine Sciences Zhuhai Key Laboratory of Marine Bioresources and EnvironmentGuangdong Provincial Key Laboratory of Marine Resources and Coastal EngineeringSouthern Marine Science and Engineering Guangdong LaboratorySun Yat-Sen UniversityZhuhaiChina Division of Cetacean Ecology Cetacea Research InstituteLantauHong Kong SARChina marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina School of Biological Sciences University of Hong KongPokfulamHong Kong SARChina State Key laboratory of marine Pollution City University of Hong KongHong Kong SARChina

The Pearl River Delta(PRD)region on the southeast coast of China has long been known as a highly productive fishing *** the late 1980s,fishing pressure in the PRD has been intense,which warrants concerns of potential fishery-related impacts on the food resources and foraging ecology of apex marine predators in this region,such as the Indo-Pacific humpback dolphin(Sousa chinensis).In this study,we examined 54 stomachs with food remains,collected from beached carcasses of humpback dolphins recovered during fifteen years between 2003 and *** 6043 identified prey items represent 62 teleost taxa,primarily small estuarine fish,but also larger reef *** dolphins appear to be opportunistic foragers,hunting across the water-column,with preference for shoaling and meaty fishes(*** lucidus IRI%=38.6%,Johnius belangerii IRI%=23.1%,Mugil cephalus IRI%=14.0%).Our findings suggest a dietary shift in recent years,from primarily demersal(as previously reported)to greater intake of neritic and pelagic *** foraging group size has decreased in recent years,which corresponds with declining size and numbers of prey items retrieved from dolphin *** suggest that these are indicators of declining food *** with a shortage of preferred prey,humpback dolphins may have broadened their dietary spectrum to maintain their daily energy intake,while their foraging group size decreased in response to the altered tradeoff between the costs and benefits of group foraging.

关键词： feeding ecology Pearl River Delta prey decline Sousa chinensis stomach content analysis

A pioneering survey of deep-diving and off-shore cetaceans in the northern South China Sea

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Integrative Zoology 2021年第4期16卷 440-450页

作者： Mingli LIN Mingming LIU Francesco CARUSO Massimiliano ROSSO Xiaoming TANG Lijun DONG Wenzhi LIN Anna BORRONI Alessandro BOCCONCELLI Liang DAI Songhai LI marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaHainanChina University of Chinese Academy of Sciences BeijingChina CIMA Research Foundation SavonaItaly Woods Hole Oceanographic Institution Woods HoleMassachusettsUSA

A pioneering boat-based survey was conducted in 2019,to gather baseline information regarding the presence,composition,relative abundance,and spatial distribution of deep-diving and off-shore cetaceans in the northern South China Sea(SCS).A total of 27 sightings comprising at least 8 cetacean species were recorded during the 13-day survey,including 5 deep-diving species(***’s dolphin[Grampus griseus],short-finned pilot whale[Globicephala macrorhynchus],sperm whale[Physeter macrocephalus],Cuvier’s beaked whale[Ziphius cavirostris],and an unidentified beaked whale[either the ginkgo-toothed beaked whale,Mesoplodon ginkgodens,or Deraniyagala’s beaked whale,Mesoplodon hotaula]),as well as 3 off-shore dolphins(*** spotted dolphin[Stenella attenuate],striped dolphin[Stenella coeruleoalba],and Fraser’s dolphin[Lagenodelphis hosei]).With the exception of pantropical spotted dolphins,all other species were sighted and recorded at sea in the northern SCS for the first *** pantropical spotted dolphin was the most frequently sighted species,comprising 30%of the total ***-diving cetaceans were mainly sighted in the northern Xisha Archipelago,whereas off-shore dolphins were distributed across the survey *** pantropical spotted dolphin was observed in aggregations of more than 100 individuals and nearly all encountered species included calves;these findings suggested that the survey area functions as an important feeding and calving ground for various cetacean *** pioneering survey provides fundamental information regarding cetacean fauna in the northern SCS and highlights the need to strengthen research and conservation efforts concerning these species.

关键词： cetacean diversity deep divers dolphins South China Sea whales

Blubber fatty acid compositions in different geographic populations of finless porpoise in Chinese waters:implications for thermal adaptation

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Integrative Zoology 2022年第4期17卷 638-655页

作者： Bin TANG Ya ZHANG Peijun ZHANG Songhai LI Jinsong ZHENG Wenqiao TANG Kexiong WANG Ding WANG Yujiang HAO Institute of Hydrobiology Chinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina College of Fisheries and Life Science Shanghai Ocean UniversityShanghaiChina marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina

The stratification of blubber fatty acids(FAs)is a widely used strategy in marine mammals and can be influenced by many factors,including their diet,environmental temperature,and physiological *** are 3 distinct finless porpoise species/subspecies in Chinese coastal and inland waters in a wide range from 20°N to 40°*** biochemical stratification of the blubbers of finless porpoises in different regions may provide valuable information for understanding their environmental *** FA compositions of 4 geographic populations of finless porpoise(FP)collected from the Bohai Gulf,East China Sea,South China Sea,and Yangtze River were therefore analyzed and *** blubber FA compositions of finless porpoises were dominated by∑MUFAs,followed by∑SFAs and∑PUFAs,and were generally consistent with those of other *** blubber of finless porpoises was significantly stratified with increasing levels of∑MUFAs and decreasing levels of∑SFAs and∑PUFAs from the inner to the outer *** 3 marine populations shared more similarities in their FA compositions and stratifications compared to the freshwater porpoises,particularly regarding the PUFAs in the inner layers,which might have been mainly influenced by the diet compositions of marine and freshwater *** to what was expected,in the 3 marine populations,the SFA and MUFA levels showed opposite correlations(negative and positive,respectively)with habitat temperatures,possibly indicating an adaptation mechanism in finless porpoises characterized by a trade-off between the insulation and fluidity properties of the blubber through the adjustment of the compositions and gradients of MUFAs and SFAs across the blubber depth in response to environmental temperature/latitude changes.

关键词： blubber fatty acids finless porpoise thermal adaptation

The biogeography of group sizes in humpback dolphins(Sousa spp.)

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Integrative Zoology 2021年第4期16卷 527-537页

作者： Mingming LIU Mingli LIN David LUSSEAU Songhai LI marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina University of Chinese Academy of Sciences BeijingChina School of Biological Sciences University of AberdeenAberdeenUK National Institute of Aquatic Resources Technical University of DenmarkLyngbyDenmark Tropical marine Science Institute National University of SingaporeSingapore

Humpback dolphins(Sousa spp.)are obligate shallow-water and resident species,and they typically live in fission–fusion societies composed of small-sized groups with changeable ***,we have scant knowledge of their behavioral ecology,starting with potential factors influencing inter-population variability of their group ***,we compiled a new global dataset of humpback dolphin group sizes based on 150 published *** data indicated an inter-specific consistency of group-living strategy among the 4 species in the Sousa genus,as these species preferred living in small-sized groups with a mean size of mostly no more than 10,a minimum size of single individual or small pairs,and a maximum size of several tens or≈*** addition,we clearly showed the geographic variations in group sizes of humpback dolphins at a global *** found that the geographic variations in humpback dolphin group sizes were primarily associated with the latitude,sea surface temperature,and *** conclude,our findings provide insights into social dynamics and socioecological trade-offs of humpback dolphins,and help better understand how these resident animals adapted to their shallow-water habitats from the perspectives of biogeography and socioecology.

关键词： biogeography geographic variations group size habitat humpback dolphins social dynamics socioecology

Sperm whales in the waters off China:A glimpse of the past and present

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Water Biology and Security 2023年第3期2卷 1-11页

作者： Mingming Liu Mingli Lin Songhai Li marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya572000China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071China

Spatiotemporal information is crucial for cetacean research and conservation,particularly for wide-ranging and migratory *** whales(Physeter macrocephalus)are distributed worldwide in deep oceans;however,little is known about the species in the western margin of the Pacific ***,we examined the available information related to the occurrence,distribution,and potential habitats of sperm whales in the waters off *** whaling information(18th–20th century)indicates that sperm whales have been captured in the East China Sea(ECS)and South China Sea(SCS).Furthermore,sporadic strandings have been recorded since the 1910s,and more frequently from 1990 *** 1990,accidental sightings have been documented in the eastern ECS,northeastern and southern SCS,and their adjacent *** recently(2019–2022),field encounters have been reported in dedicated ship-based investigations in the Xisha and Nansha waters,providing robust evidence of the regular existence and potential residency of sperm whales in the northwestern and central areas of the *** nursery groups suggest that the Xisha waters might be an important nursing ground for sperm *** tracking data from four adults showed that sperm whales in the SCS might display both fine-scale and long-distance *** together,it appears that sperm whales are currently active in the waters off China,and that deep waters(depth>200 m)in the ECS and SCS may provide the species with critical *** review provides crucial baseline information on sperm whales in the waters off China,which may help to facilitate future research efforts and conservation initiatives for the species at national and cross-regional *** field investigations and other monitoring approaches including acoustic monitoring,biologging,photo-identification,and genetics are required to reveal the distribution,movement,and habitat use patterns of sperm whales in these waters.

关键词： Sperm whales Occurrence Distribution Deep waters Bohai Sea Yellow Sea East China Sea South China Sea

Photo-identification comparison of four Indo-Pacific humpback dolphin populations off southeast China

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Integrative Zoology 2021年第4期16卷 586-593页

作者： Xiaoming TANG Wenzhi LIN Leszek KARCZMARSKI Mingli LIN Stephen C.Y.CHAN Mingming LIU Tianfei XUE Yuping WU Peijun ZHANG Songhai LI marine mammal and marine bioacoustics laboratory Institute of Deep-sea Science and EngineeringChinese Academy of ScienceSanyaChina University of Chinese Academy of Sciences BeijingChina Division of Cetacean Ecology Cetacea Research InstituteLantauHong Kong S.A.R.China School of marine Sciences Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai Key Laboratory of Marine Bioresources and EnvironmentGuangdong Provincial Key Laboratory of Marine Resources and Coastal EngineeringSun Yat-Sen UniversityZhuhaiChina School of Biological Sciences University of Hong KongPokfulamHong Kong S.A.R.China Tropical marine Science Institute National University of SingaporeSingapore

Indo-Pacific humpback dolphins(Sousa chinensis)inhabit shallow coastal waters of the Indo-Pacific region including southeast China,with at least 6 putative populations identified to date in Chinese ***,the connectivity among these populations has not yet been fully *** the present study,we compared and crossmatched photographic catalogs of individual dolphins collected to date in the Pearl River Delta region,Leizhou Bay,Sanniang Bay,and waters southwest of Hainan Island,a total of 3158 individuals,and found no re-sighting of individual dolphins among the 4 study ***,there was a notable difference in the pigmentation pattern displayed by individuals from these 4 *** suggest that this may be a phenotypical expression of fine-scale regional differentiation among humpback dolphin groups,possibly distinct *** the considerable conservation management implications it may carry(*** of management units),further research is much needed.

关键词： body color photographic identification pigmentation pattern population connectivity Sousa chinensis