Using local ecological knowledge to determine ecological status and threats of the East Asian finless porpoise, Neophocaena asiaeorientalis sunameri, in south Bohai Sea, China

Cheng, Zhaolong; Pine, Matthew K.; Li, Yongtao; Zuo, Tao; Niu, Mingxiang; Wan, Xiaoling; Zhao, Xiaolan; Wang, Kexiong; Wang, Jun

doi:10.1016/j.ocecoaman.2021.105516

Cited by 12 publications

(15 citation statements)

References 67 publications

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“…As a protected species in Chinese waters, EAFPs are of particular concern for stakeholders (Cheng et al . 2021). However, the conservation of these porpoises within the Bohai Sea has been hindered due to scarce and deficient baseline knowledge.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, trawls are responsible for many small odontocete bycatch fatalities, including EAFP fatalities (Cheng et al . 2021). A bottom trawling ban in the Bohai Sea was enacted in 2004, but it still seems to be one of the most popular fishing method (Cheng et al .…”

Section: Discussionmentioning

confidence: 99%

“…Bottom trawling also disturbs benthic habitats by sediment resuspension and removal of sessile organisms such as sponges, soft corals, and bivalves (Mak et al 2021). In addition, trawls are responsible for many small odontocete bycatch fatalities, including EAFP fatalities (Cheng et al 2021). A bottom trawling ban in the Bohai Sea was enacted in 2004, but it still seems to be one of the most popular fishing method (Cheng et al 2021).…”

Section: Conservation Suggestionsmentioning

confidence: 99%

“…In addition, trawls are responsible for many small odontocete bycatch fatalities, including EAFP fatalities (Cheng et al 2021). A bottom trawling ban in the Bohai Sea was enacted in 2004, but it still seems to be one of the most popular fishing method (Cheng et al 2021). Other anthropogenic activities (reclamation, harbor and wind farm construction, and aquaculture) also impose long-term threats to marine animals, such as soniferous fish and EAFPs (Huang et al 2021).…”

Section: Conservation Suggestionsmentioning

confidence: 99%

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Association between porpoise presence and fish choruses: implications for feeding strategies and ecosystem‐based conservation of the East Asian finless porpoise

Cheng

Pine

et al. 2022

Integr. Zool.

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The associations between feeding activities and environmental variables inform animal feeding tactics that maximize energetic gains by minimizing energy costs while maximizing feeding success. Relevant studies in aquatic animals, particularly marine mammals, are scarce due to difficulties in the observation of feeding behaviors in aquatic environments. This data scarcity concurrently hinders ecosystem‐based fishery management in the context of small toothed‐cetacean conservation. In the present study, a passive acoustic monitoring station was deployed in an East Asian finless porpoise habitat in Laizhou Bay to investigate potential relationships between East Asian finless porpoises and their prey. The data revealed that porpoises were acoustically present nearly every day during the survey period. Porpoise detection rates differed between spring and autumn in concert with activities of fish choruses. During spring, fish choruses were present throughout the afternoon, and this was the time when porpoise vocalizations were the most frequently detected. During autumn, when fish choruses were absent, porpoise detection rates decreased, and diurnal patterns were not detected. The close association between fish choruses and finless porpoise activities implies an “eavesdropping” feeding strategy to maximize energetic gains, similar to other toothed cetaceans that are known to engage similar feeding strategies. Underwater noise pollution, particularly those masking fish choruses, could interrupt finless porpoises’ feeding success. Fisheries competing soniferous fishes with finless porpoise could impact finless porpoise viability through ecosystem disruption, in addition to fishing gear entanglement.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Conservation Suggestionsmentioning

confidence: 99%

Section: Conservation Suggestionsmentioning

confidence: 99%

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Association between porpoise presence and fish choruses: implications for feeding strategies and ecosystem‐based conservation of the East Asian finless porpoise

Cheng

Pine

et al. 2022

Integr. Zool.

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“…Over the past few decades, local ecological knowledge (LEK) has been proven to be a very functioning and accurate complementary tool to scientific data, filling in gaps and providing new information regarding the environment (Gilchrist et al 2005;de Magalha ˜es et al 2012;Frans and Auge ´2016;Alati et al 2020;Cheng et al 2021). Yet, even with several published works about local and traditional knowledge is noticeably being lost in a time when it is critically needed (Aswani et al 2018;Ogar et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Fishermen’s knowledge and conservation attitudes: focus on the great cormorant Phalacrocorax carbo (Linnaeus, 1758) in the Minho River, Portugal

et al. 2022

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Considerate the attitudes of traditional communities and their local ecological knowledge (LEK) can contribute to better policymaking and more appropriate management plans. Thus, this study strived to share the Minho River’s fishermen LEK about great cormorant Phalacrocorax carbo (Linnaeus, 1758), as well as it exposes their conservation attitudes towards this species. We described and analysed interviewees’ LEK qualitatively, while their attitudes were analysed quantitatively through correlation with variables from fishermen’s profile. Fishermen were able to identify cormorant’s ecological characteristics like habitats, prey species, and foraging behaviour. They also exposed an overall moderate attitude towards the conservation of great cormorants. The LEK often was supported by published data, but we found diverse information in some themes, such as habitat and diet. We found a significant negative correlation between fishermen’s age and attitudes ( p = 0.02), and those fishermen who often fished contrasted significantly from those who rarely fished ( p = 0.02). We lastly reaffirm the importance of the present study as background information regarding P. carbo in Minho River and of ethnobiological studies as a tool for management plans. Supplementary Information The online version contains supplementary material available at 10.1007/s10452-021-09928-4.

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The distribution and habitat characterization of the East Asian finless porpoise (Neophocaena asiaeorientalis sunameri) in coastal waters off Qingdao, China: Implications for management and conservation

Li,

Cheng,

Zuo

et al. 2024

Aquatic Conservation

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The East Asian finless porpoise (Neophocaena asiaeorientalis sunameri) distributes in coastal waters across the western Pacific Ocean, ranging from the Taiwan Strait to northern China, Korea and Japan. Limited baseline data are available for this threatened species, including the coastal region of Qingdao, China, hindering the implementation of conservation management. The Oceanographic characteristics were derived from on‐board measurements and satellite remote sensing, including depth, slope, sea surface temperature (SST), salinity and chlorophyll a (Chla) concentration. Kernel density estimation (KDE) was utilized to determine the extent of occurrence and core distribution of East Asian finless porpoises. The surveys covered an area of 4532 km2, encompassing 7314 km of transect lines. The 95% KDE and 50% KDE for East Asian finless porpoises within the study site included 1987 and 297 km2, respectively. The 50% KDE revealed Laoshan Bay as the core distribution zone. Significant relationships were identified between distribution probability and three oceanographic variables: salinity, Chla concentration and distance to shore. In this study, the Aoshan Bay Marine Park, which was designed with no prior knowledge of East Asian finless porpoise, shows partial overlap with the core distribution for this species. This demonstrates that MPAs (marine protected areas) that are not explicitly designated for marine mammals may not comprehensively address all their specific requirements, but the existence and conservation endeavours associated with the MPAs can still yield substantial positive outcomes for these species. 5. This study provides the inaugural comprehensive baseline data on the population distribution and habitat characteristics of the East Asian finless porpoise. It underscores the necessity for a robust data collection protocol spanning China, Japan and Korea to address the critical shortfall in baseline data and enhance conservation efforts.

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Using local ecological knowledge to determine ecological status and threats of the East Asian finless porpoise, Neophocaena asiaeorientalis sunameri, in south Bohai Sea, China

Cited by 12 publications

References 67 publications

Association between porpoise presence and fish choruses: implications for feeding strategies and ecosystem‐based conservation of the East Asian finless porpoise

Association between porpoise presence and fish choruses: implications for feeding strategies and ecosystem‐based conservation of the East Asian finless porpoise

Fishermen’s knowledge and conservation attitudes: focus on the great cormorant Phalacrocorax carbo (Linnaeus, 1758) in the Minho River, Portugal

The distribution and habitat characterization of the East Asian finless porpoise (Neophocaena asiaeorientalis sunameri) in coastal waters off Qingdao, China: Implications for management and conservation

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