Ten guiding principles for the delineation of priority habitat for endangered small cetaceans

Ross, Peter S.; Barlow, Jay; Jefferson, Thomas A.; Hickie, Brendan E.; Lee, Tatiana; MacFarquhar, Christina; Parsons, E. C. M.; Riehl, Kimberly N.; Rose, Naomi A.; Slooten, Elisabeth; Tsai, Chia-Yang; Wang, John Y.; Wright, Andrew; Yang, Shih Chu

doi:10.1016/j.marpol.2010.11.004

Cited by 27 publications

(15 citation statements)

References 44 publications

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“…Dugongs have not been seen in recent decades by most of our informants, which indicates that these animals in particular have seriously declined around Hainan and may even be regionally extinct (Wang et al ., ). Other marine mammals in the SCS are threatened by a range of anthropogenic factors, of which bycatch is only one of the components (Ross et al ., ). Informants in our study considered that marine mammal species in the SCS were also impacted by overfishing, water pollution and vessel collisions, with bycatch possibly constituting a significant danger particularly for small dolphins, which are more likely to become entangled in fishing gear due to their small body size (e.g.…”

Section: Discussionmentioning

confidence: 97%

“…It may be necessary to establish new marine protected areas to mitigate the ongoing pressure of fishing activities and conserve fishery resources and marine mammals, especially in coastal or estuary regions around Hainan such as Sanya and Chuanghua estuary (Fig. ) where marine mammals may be particularly vulnerable to both competition with fisheries and anthropogenic mortality (Pitcher et al ., ; Ross et al ., ). Hunting, killing, consumption and trade in marine mammals requires improved control around Hainan, both through increased community‐based education initiatives to raise marine mammal conservation awareness, and through improved enforcement of wildlife protection laws and associated legislation already established to protect marine mammal populations (Whitty, ).…”

Section: Discussionmentioning

confidence: 97%

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Fishers' knowledge as an information source to investigate bycatch of marine mammals in the South China Sea

Liu

Lin

Turvey

et al. 2016

Animal Conservation

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Bycatch mortality is a significant driver of marine mammal population declines. However, there is little information available on patterns or magnitude of bycatch mortality in many heavily fished Asian marine systems such as the South China Sea (SCS). To address this limited knowledge base, we conducted interviews with fishers to gather local ecological knowledge on marine mammal bycatch around Hainan Island, China. Gillnets were the primary fishing gear used in local fisheries, and were also responsible for the majority of reported marine mammal bycatch events in recent decades. Bycatch events were reported from all seasons but were most frequent in spring (38.4%), which might relate to seasonal variation in fishing activities. The spatial pattern of relative bycatch densities for Indo-Pacific humpback dolphins, Indo-Pacific finless porpoises and unidentified small dolphins varied around Hainan and neighbouring waters. A substantial proportion of informants (36.1 and 9.2% respectively) reported that they have eaten or sold marine mammal meat, demonstrating the continued existence of cultural practices of consuming marine mammals on Hainan. Responses of fishers to bycatch events were dependent both on their existing attitudes and perceptions towards marine mammals and on other sociocultural factors. Almost half of informants agreed that marine mammal populations in the SCS have decreased. Declines were thought by informants to have been caused by overfishing, water pollution and vessel collisions, with bycatch responsible for further declines in dolphins.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Fishers' knowledge as an information source to investigate bycatch of marine mammals in the South China Sea

Liu

Lin

Turvey

et al. 2016

Animal Conservation

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“…As discussed, both high-resolution optical satellites, synthetic aperture radars and AIS provide options to aid and enhance enforcement efforts in MPAs by monitoring vessel presence and movement via imagery (Kourti et al, 2005;Corbane et al, 2010). In addition, SRS-derived data could be used to identify habitat hot spots within MPAs for more directed enforcement effort (Ross et al, 2011;Irigoyen et al, 2018). Consequently, we feel SRS will play a valuable role for the selection and enforcement of MPAs in future.…”

Section: Marine Protected Areasmentioning

confidence: 99%

Satellite Remote Sensing in Shark and Ray Ecology, Conservation and Management

et al. 2019

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Global elasmobranch populations have declined dramatically over the past 50 years, and continued research into the drivers of their habitats and distributions is vital for improved conservation and management. How environmental factors influence elasmobranch behavior, habitat use, and movement patterns is still relatively poorly understood, in part because of the scale over which many of these animals roam and the remote nature of the marine ecosystems they inhabit. In the last decade there has been an explosion of satellite remote sensing (SRS) technologies that can cover these vast spatial scales for the marine environment. Consequentially, SRS presents an opportunity to analyze important environmental drivers in elasmobranch ecology and to aid management decisions for the conservation of declining populations. A systematic literature review was undertaken to synthesize the current use of SRS environmental data in elasmobranch research. In addition, to facilitate the use of SRS in this field moving forward, we have compiled a list of popular SRS data sources and sensors for common environmental variables in marine science. Our review of 71 papers (55 published in the last 10 years) identified ten SRS-derived environmental variables that have been used in elasmobranch studies, from a range of satellite sensors and data sources. Sea surface temperature and ocean productivity were the most frequently used variables. Articles primarily analyzed variables individually or in pairs, with few studies looking at a suite of interacting variables. Here, we present a summary of the current state of knowledge on the application of SRS, current gaps and limitations, and discuss some of the potential future directions in which we envisage this field developing. Threatened elasmobranch populations inhabit some of the world's most remote marine ecosystems. With often global coverage, SRS presents an opportunity to analyze the important environmental drivers of elasmobranch ecology to aid management decisions for the conservation of declining and threatened populations.

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“…The spatial scale of the protected area should be large enough to be biologically relevant and small enough that cetaceanwatch operations can be effectively managed within its boundaries (Ashe et al, 2010;Ross et al, 2011). Furthermore, the time when the critical behaviour occurs should inform management agencies when to restrict human access to the protected area.…”

Section: Management Considerationsmentioning

confidence: 99%