Cetacean abundance and distribution in European Atlantic shelf waters to inform conservation and management

Hammond, Philip S.; Macleod, Kelly; Berggren, Per; Borchers, David L.; Burt, M Louise; Cañadas, Ana; Desportes, Geneviève; Donovan, Gregory P.; Gilles, Anita; Gillespie, Douglas; Gordon, Jonathan; Hiby, Lex; Kuklik, Iwona; Leaper, Russell; Lehnert, Kristina; Leopold, M.F.; Lovell, Phil; Øien, Nils; Paxton, Charles G. M.; Ridoux, Vincent; Rogan, Emer; Samarra, Filipa I. P.; Scheidat, Meike; Sequeira, Marina; Siebert, Ursula; Skov, Henrik; Swift, René; Tasker, Mark L.; Teilmann, Jonas; Canneyt, Olivier Van; Vázquez, José Antonio

doi:10.1016/j.biocon.2013.04.010

Cited by 356 publications

(470 citation statements)

References 35 publications

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“…Nevertheless, the data could be correlated with several environmental parameters and installation related characteristics. The increasing number of harbour porpoise sightings towards the south may be related to proximity of the southern installation with areas where this species is known to occur in numbers (Gilles et al, 2009(Gilles et al, , 2016Hammond et al, 2013). Other taxonomic relationships with depth and installation aerial footprint could be explained by differences in prey availability (Pickering & Whitmarsh, 1997;Fujii, 2015).…”

Section: Discussionmentioning

confidence: 99%

Marine mammal sightings around oil and gas installations in the central North Sea

Delefosse

Rahbek²,

Roesen³

et al. 2017

J. Mar. Biol. Ass.

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Relatively little is known about the distribution and diversity of marine mammals around offshore anthropogenic structures. We present results obtained from incidental sightings of marine mammals around oil and gas installations located 200 km off the Danish coast. A total of 131 sightings corresponding to about 288 animals were reported between May 2013 and May 2016. A total of seven marine mammal species were identified, five cetaceans: harbour porpoise (Phocoena phocoena), minke whale (Balaenoptera acutorostrata), white-beaked dolphin (Lagenorhynchus albirostris), killer whale (Orcinus orca), pilot whales (Globicephala spp.) and two species of pinnipeds: harbour (Phoca vitulina) and grey seals (Halichoerus grypus). The most sighted species were harbour porpoise (41%) and minke whale (31%). Relative counts and biodiversity of marine mammals observed around installations corresponded well with the expected distribution in the central North Sea. Several taxon-specific correlations were identified between number of sightings and environmental parameters (depth and latitude) or installation characteristics (installation aerial footprint). Furthermore, 85% of sightings were made during spring and summer and it is unclear whether the pattern observed reflected a natural seasonal occurrence of marine mammals in the area or an effect of reduced effort during autumn and winter. Despite the potential caveats, results obtained during this programme provide an insight into the relationship between marine mammals and oil and gas offshore installations in the North Sea.

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Section: Discussionmentioning

confidence: 99%

Marine mammal sightings around oil and gas installations in the central North Sea

Delefosse

Rahbek²,

Roesen³

et al. 2017

J. Mar. Biol. Ass.

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“…The porpoises in Dutch waters belong to the population that uses the wider North Sea (Evans et al 2009 (Hammond et al, 2013(Hammond et al, , 2017. Using a model-based approach, with the SCANS data and national surveys, Gilles et al 2010, 2014, 2015and 2017, 2013a, 2014b 2010 (25,998, CI = 13,988 -53,623) andJuly 2014 (76,773, CI = 43,414-154,265).…”

Section: Other Marine Mammals -Sightingsmentioning

confidence: 99%

Marine mammal surveys in Dutch North Sea waters in 2017

Geelhoed¹,

Onderzoeksformatie²,

Janinhoff³

et al. 2018

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“…The relationships between the spatial occurrence of the cetaceans and environmental variables were assessed using generalized additive modelling (GAM) techniques (Hastie and Tibshirani 1990, Hammond et al 2013, Notarbartolo di Sciara et al 2015. Data exploration was applied following the protocol described in Zuur et al (2010).…”

Section: Species Distribution Modelsmentioning

confidence: 99%

Habitat preferences among three top predators inhabiting a degraded ecosystem, the Black Sea

Sánchez-Cabanes¹,

Nimak-Wood²,

Harris³

et al. 2017

Sci. Mar.

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Summary: This study investigated whether there is evidence of widespread niche partitioning based on environmental factors in the Black Sea and tested the hypothesis that physiographic factors may be employed as predictors. It addresses poorly researched areas with good habitat potential for the only three cetacean subspecies living in this area: the Black Sea short-beaked common dolphin (Delphinus delphis spp. ponticus), the Black Sea bottlenose dolphin (Tursiops truncatus spp. ponticus) and the Black Sea harbour porpoise (Phocoena phocoena spp. relicta). Generalized additive models (GAMs) were used to analyse data collected from multiple sources. In total, 745 sightings of the three species between 1998 and 2010 throughout the Black Sea were included. The analysis found depth and sea surface temperature to be the most important variables for separating the occurrence of the three species. Common dolphins occurred mainly in deep waters and in areas where the sea surface temperature was low, bottlenose dolphins were distributed primarily in shallower and warmer waters than common dolphins, and harbour porpoises were distributed in shallower waters with lower sea surface temperature than bottlenose dolphins. This study suggests strong niche segregation among the three cetacean species. The study is also the first contribution to the basic information of cetacean species distribution and habitat preferences in the Black Sea as a whole. Knowledge of the distribution of the three dolphin species in the study area is essential to establish conservation measures for these populations.Keywords: Black Sea; bottlenose dolphin; common dolphin; GAM; habitat preferences; harbour porpoise; niche segregation; spatial modelling. Preferencias de hábitat de tres superpredadores en el mar NegroResumen: El presente trabajo analiza si existen evidencias de partición de nicho en base a factores ecológicos básicos en el mar Negro, así como si dichos factores pueden ser empleados como predictores de distribución en zonas pobremente muestreadas con respecto a las tres especies de cetáceos que habitan el área: el delfín común del mar Negro (Delphinus delphis spp. ponticus), el delfín mular del mar Negro (Tursiops truncatus spp. ponticus) y la marsopa del mar Negro (Phocoena phocoena spp. relicta). Se usaron Modelos Aditivos Generalizados (GAMs) para analizar grupos de datos provenientes de múltiples fuentes. En total fueron incluidos 745 avistamientos de las tres especies entre los años 1998 y 2000. El análisis indica que las variables profundidad y temperatura superficial del mar fueron las más influyentes a la hora de segregar las especies espacialmente. La distribución del delfín común indicó una relación positiva con aguas más profundas y frías, mientras el delfín mular y la marsopa con aguas más superficiales y cálidas, tendiendo esta última a localizarse en aguas más frías con respecto al delfín mular. Este trabajo sugiere, por lo tanto, que existe una importante segregación de nicho entre las tres especies de cetáceos. Este análi...

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Cetacean abundance and distribution in European Atlantic shelf waters to inform conservation and management

Cited by 356 publications

References 35 publications

Marine mammal sightings around oil and gas installations in the central North Sea

Marine mammal sightings around oil and gas installations in the central North Sea

Marine mammal surveys in Dutch North Sea waters in 2017

Habitat preferences among three top predators inhabiting a degraded ecosystem, the Black Sea

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