The significance of stranding data as indicators of cetacean populations at sea: Modelling the drift of cetacean carcasses

Peltier, Hélène; Dabin, Willy; Daniel, Pierre; Canneyt, Olivier Van; Dorémus, Ghislain; Huon, Mathilde; Ridoux, Vincent

doi:10.1016/j.ecolind.2011.11.014

Cited by 169 publications

(180 citation statements)

References 49 publications

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“…Cetacean strandings attract significant attention from the public and there are few locations along the coastline where beach-washed cetaceans are not reported. The proportion of carcasses or debilitated animals that reach the shoreline is unknown, and is likely to depend on factors such as currents, wind and carcass buoyancy, and losses to scavengers (Peltier et al, 2012). Cetaceans are also reported floating dead or debilitated at sea.…”

Section: The Queensland Marine Wildlife Strandings and Mortality Progmentioning

confidence: 99%

“…However, the relationship between strandings records and population trends in live assemblages can be confounded by a range of factors such as unusual stranding events (e.g. epizootics or mass strandings), environmental variation (Meager and Limpus, 2014), carcass drift (Peltier et al, 2012) or reporting effort. It is also arguable whether strandings records represent the demographics of living communities, because the risks of mortality or morbidity characteristically vary with ontogeny (Perrin et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Bycatch and strandings programs as ecological indicators for data-limited cetaceans

Meager

Sumpton

2016

Ecological Indicators

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a b s t r a c tAn integrated approach of using strandings and bycatch data may provide an indicator of long-term trends for data-limited cetaceans. Strandings programs can give a faithful representation of the species composition of cetacean assemblages, while standardised bycatch rates can provide a measure of relative abundance. Comparing the two datasets may also facilitate managing impacts by understanding which species, sex or sizes are the most vulnerable to interactions with fisheries gear. Here we apply this approach to two long-term datasets in East Australia, bycatch in the Queensland Shark Control Program (QSCP, 1992(QSCP, -2012 and strandings in the Queensland Marine Wildlife Strandings and Mortality Program (StrandNet, 1996(StrandNet, -2012. Short-beaked common dolphins, Delphinus delphis, were markedly more frequent in bycatch than in the strandings dataset, suggesting that they are more prone to being incidentally caught than other cetacean species in the region. The reverse was true for humpback whales, Megaptera novaeangliae, bottlenose dolphins, Tursiops spp.; and species predominantly found in offshore waters. QSCP bycatch was strongly skewed towards females for short-beaked common dolphins, and towards smaller sizes for Australian humpback dolphins, Sousa sahulensis. Overall, both datasets demonstrated similar seasonality and a similar long-term increase from 1996 until 2008. Analysis on a species-byspecies basis was then used to explore potential explanations for long-term trends, which ranged from a recovering stock (humpback whales) to a shift in habitat use (short-beaked common dolphins).Crown

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Section: The Queensland Marine Wildlife Strandings and Mortality Progmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bycatch and strandings programs as ecological indicators for data-limited cetaceans

Meager

Sumpton

2016

Ecological Indicators

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“…This is due to several factors such as the geographical origin of a sample is not always known, the statistical credibility of stranding data is disputed, and mostly, because sampling is commonly opportunistic in nature (Peltier et al 2012). The reliability and validity of stranding data is highly dependent on a dependable network of collaborators, long sampling periods and systematic and uniform collection efforts in a certain area.…”

mentioning

confidence: 99%

“…studies have suggested that only about 8% of small cetaceans that die at sea end up stranding in coastal areas (Peltier et al 2012, Prado et al 2013). According to Peltier et al (2012), the number of dead cetaceans that reach the coastline and get stranded depend on several parameters such as currents, distance from the coast, atmospheric pressure, wind speed and carcass buoyancy.…”

mentioning

confidence: 99%

“…According to Peltier et al (2012), the number of dead cetaceans that reach the coastline and get stranded depend on several parameters such as currents, distance from the coast, atmospheric pressure, wind speed and carcass buoyancy. Coastal species are less influenced by marine currents and coastal winds, commonly stranding near their home ranges (Pyenson 2010, 2011, Prado et al 2013.…”

mentioning

confidence: 99%

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Review of thirty-two years of toothed whale strandings in Santa Catarina, southern Brazil (Cetacea: Odontoceti)

Vianna

Loch

Castilho

et al. 2016

Zoologia (Curitiba)

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An integrated approach for cetacean knowledge and conservation in the central Mediterranean Sea using research and social media data sources

Pace

Giacomini

Campana

et al. 2019

Aquatic Conservation

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Sources of data other than those derived from conventional research protocols may contribute valuable information to fill gaps in knowledge about cetacean occurrences and diversity in a given area and help address conservation issues. The performance of a method to examine cetacean communities based on presence records systematically derived from shared photographs and videos posted by boaters and maritime operators on social media (e.g. YouTube and Facebook) combined with patchy distributed visual/acoustic data collected by researchers has been evaluated. Records (N = 1,274) gathered over a 10‐year period (2008–2017) have been used to obtain insights into species' presence and habitat selection in a scattered study area of the central Mediterranean Sea (Italy). The effectiveness of the method, practical and theoretical advantages, limitations, and challenges of using data originated from social media for research and conservation purposes are discussed. Seven out of the eight cetacean species regularly residing in the Mediterranean have been reported in the area, with different relative densities. Maximum entropy modelling techniques have been applied to the datasets derived from (a) social media, (b) research surveys, and (c) the combination of the two, using six fixed variables as proxies for cetacean presence. Distance from the coast and depth emerged as the main variables predicting encounters, with specificities related to the ecology of the species. The approach was reliable enough to obtain broad‐scale, baseline information on cetacean communities in the region, on the basis of which initial conservation recommendations and future research programmes can be proposed. With the increasing need for studying whale and dolphin population ecology coming from national/international directives, support from citizens to aid research may act as a practical, inexpensive solution to gathering extensive spatial–temporal data for regional‐scale monitoring and for the development of management priorities.

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The significance of stranding data as indicators of cetacean populations at sea: Modelling the drift of cetacean carcasses

Cited by 169 publications

References 49 publications

Bycatch and strandings programs as ecological indicators for data-limited cetaceans

Bycatch and strandings programs as ecological indicators for data-limited cetaceans

Review of thirty-two years of toothed whale strandings in Santa Catarina, southern Brazil (Cetacea: Odontoceti)

An integrated approach for cetacean knowledge and conservation in the central Mediterranean Sea using research and social media data sources

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