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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

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

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

Microbial diversity and structure in the gastrointestinal tracts of two stranded short-finned pilot whales(Globicephala macrorhynchus)and a pygmy sperm whale(Kogia breviceps)

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Integrative Zoology 2021年第3期16卷 324-335页

作者： Shijie BAI Peijun ZHANG Mingli liN Wenzhi liN Zixin YANG songhai li Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanyaChina

Information on the gut microbiome composition of different mammals could provide novel insights into the evolution of mammals and succession of microbial communities in different ***,there is limited information on the gut microbiome composition of marine mammals,especially cetaceans because of sampling *** this study,we investigated the diversity and composition of microbial communities in the stomach,midgut,and hindgut of 2 stranded short-finned pilot whales(Globicephala macrorhynchus)and hindgut of a stranded pygmy sperm whale(Kogia breviceps)by using 16S rRNA gene amplicon sequencing *** the basis of the 50 most abundant operational taxonomic units,principal coordinate analysis,and non-metric multidimensional scaling analysis,we confirmed that the gut microbial communities of the 3 whales were *** results revealed that the gut microbiome of 1 stranded short-finned pilot whale GM16 was dominated by Firmicutes(mainly Clostridium)and Fusobacteria;whereas that of the other pilot whale GM19 was composed of Gammaproteobacteria and Bacteroidetes(mainly Vibrio and Bacteroides,respectively),probably caused by intestinal disease and antibiotic *** gut microbiome of the pygmy sperm whale was dominated by Firmicutes and ***,different gastrointestinal tract regions harbored different microbial community *** our knowledge,this is the first report of the gut microbiome of short-finned pilot whales,and our findings will expand our current knowledge on microbial diversity and composition in the gastrointestinal tract of cetaceans.

关键词： gastrointestinal tract gut microbiome microbial diversity pygmy sperm whale(Kogia breviceps) short-finned pilot whale(Globicephala macrorhynchus)

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

Sexual maturity,seasonal estrus,and gestation in female Indo-Pacific bottlenose dolphins Tursiops aduncus inferred from serum reproductive hormones

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Integrative Zoology 2021年第4期16卷 575-585页

作者： Peijun ZHANG Zhengzhi WEI Suk-Wai HUI Grant ABEL Paolo MARTELli Yujiang HAO 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 Ocean Park Hong Kong Hong Kong SARChina Seattle Aquarium SeattleWAUSA Institute of HydrobiologyChinese Academy of Sciences WuhanChina

Reproductive hormones in serum concentrations of progesterone,estradiol,and testosterone in female Indo-Pacific bottlenose dolphins(Tursiops aduncus,n=12)housed in Ocean Park Hong Kong were investigated in the present *** showed that,onset of puberty of captive Indo-Pacific bottlenose dolphins was at 5 years while sexual maturity was at *** serum progesterone concentrations in non-pregnant sexually mature individuals was 0.33(0.25–0.97)ng/mL(interquartile),significantly higher than in immature ones 0.26(0.25–0.38)ng/*** study found significant difference in serum estradiol concentrations between individuals at the onset of puberty(9.5±1.7 ng/mL,±SD)and not(below detection limit 9 pg/mL).A slightly seasonal breeding pattern,with progesterone values tend to be higher from February to October(0.38[0.25–1.07]ng/mL)was *** pregnancy,serum progesterone concentrations range from 10.54±8.74 ng/mL(indexed month post-conception[IMPC]0)to 25.49±12.06 ng/mL(IMPC 2),and display a bimodal pattern with 2 peaks in early-(25.49±12.06 ng/mL,IMPC 2)and late-pregnancy(21.71±10.25 ng/mL,IMPC 12),*** estradiol concentrations can seldom be detected in early-pregnancy and increase constantly in mid-(9.45±1.83 pg/mL)and late-pregnancy(11.88±3.81 pg/mL),with a spike(15.45±6.78 pg/mL)1 month prior to *** testosterone concentrations elevate significantly in IMPC 7(0.36±0.10 ng/mL)compared to other months(0.16±0.10 ng/mL)of the *** present study provides normal concentration profiles for some reproductive hormones in female Indo-Pacific bottlenose dolphins and can contribute to the breeding monitoring of this ***,our study would shed further light on the reproductive physiology of small cetaceans.

关键词： cetacean estradiol pregnancy progesterone testosterone

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

Mapping the fishing intensity in the coastal waters off Guangdong province, China through AIS data

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Water Biology and Security 2023年第1期2卷 38-48页

作者： Shenglan Chen Wenzhi lin Chen Zeng Binshuai liu Agathe Serres songhai li Marine Mammal and Marine Bioacoustics Laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya572000China University of Chinese Academy of Sciences Beijing100049China School of Marine Sciences Sun Yat-sen UniversityZhuhai510080China School of Law Zhongnan University of Economics and LawWuhan430073China

Fishing activities result in a depletion of fish resources and an increase in bycatch probability of non-target species,which are thought to be the cause of the recent demographic change experienced by coastal cetaceans in waters off Guangdong province,***,fishing intensity and its spatiotemporal pattern remain poorly examined in this ***,random daily tracks from 100 fishing vessels were used to estimate fishing operations in the coastal waters off Guangdong *** performance of two methods was tested with Automatic Identification System(AIS)data collected in the Pearl River Delta region(PRD).This assessment found that the Density-Based Spatial Clustering of Applications with Noise(DBSCAN)could falsely identify port regions as fishing grounds,while the speed-based method provided a more accurate estimate of fishing grounds with less computational ***,the spatiotemporal pattern of fishing intensity in the coastal waters off the entire Guangdong province was examined with the speed-based *** results showed that 87.75%of the coastal fishing activities occurred in waters<40 m in *** method detected two spatially heterogeneous fishing grounds extending from the PRD to either the west or east sides of Guangdong *** the west fishing ground,43.4%of fishing vessels operated in the waters off Yangjiang city;while in the east fishing ground,fishing activities were more evenly *** present study suggests that the AIS is able to provide high-resolution data to monitor the development of fishing activities,which may be useful for informing marine resource management and spatial planning.

关键词： Fishing activity Fishing effort Fisheries management Pearl River Delta Marine stress

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