Basking shark hotspots on the West Coast of Scotland: Key sites, threats and implications for conservation of the species

Copyright © Scottish Natural Heritage 2009.The Wildlife Trusts’ Basking Shark Project conducted effort-corrected line transect surveys for the basking shark (Cetorhinus maximus) along the west coast of Scotland between 2002- 2006. A total of 11,179km of linear transects consisting of 956 hours duration were covered, and a total of 593 sharks were recorded whilst on transect. The project aimed to establish whether key sites (hotspots) existed for the species within the overall region, where significant numbers of sharks could be seen at the surface on a regular basis. This information could then be used to develop practical means of protecting surface swimming sharks at such sites, such as educational maps of the hotspot sites for distribution to leisure and commercial boat users, and to inform future developments within the marine environment e.g. fisheries and renewable energy developments.The project enjoyed the support of many Organisations, both financially and in spirit. These include Natural England, The Wildlife Trusts, WWF-UK, Earthwatch Institute (Europe), The Born Free Foundation, The Shark Foundation (Hai Stiftung), The Shark Trust, the Marine Conservation Society, the Heritage Lottery Fund, the National Express Group, the Save Our Seas Foundation, Volvo Ocean Adventure, the Esmee Fairbairn Foundation, and Canon (UK). Their support was invaluable

Have Centuries of Inefficient Fishing Sustained a Wild Oyster Fishery: a Case Study

The native European flat oyster (Ostrea edulis) has declined throughout its range, due to over-exploitation, a situation mirrored in oyster stocks globally. There are three remaining oyster fisheries in England (Fal, Solent, and Thames Estuary). The Fal oyster fishery though employs traditional methods, using hand-hauled dredges from rowing punts or under sail and is home to the last commercial sailing fleet in Europe. Against a backdrop of temporary closures to protect dwindling stocks in the Solent and Thames Estuary, this study considers whether the longevity of the Fal oyster fishery is linked to the traditional methods that have been employed for centuries. Using GPS tracking in combination with on board observers, we demonstrate that dredging under sail is inefficient compared to more modern mechanically powered methods that are utilised elsewhere. A review of historical landings suggests that both overall landings and fishing effort have declined. The fishery appears to have gone through cycles of over-exploitation and one closure due to disease. However, the key to the long-term survival of the Fal oyster fishery may be linked to the traditional method of dredging. It is estimated that a switch from traditional methods to modern techniques would result in a greater than 9 fold increase in effort per season. The data presented highlight this unique fishery as a counterfactual to the increases in power seen in commercial fisheries over the last century and serve as a reference point for future studies

Basking shark breaching behaviour observations West of Shetland

This is the author accepted manuscript. The final version is available from BioMed Central via the DOI in this record.This study reports observations of basking sharks (Cetorhinus maximus) sighted during an offshore geophysical survey conducted in July and August 2013, west of Shetland, UK. During the 38-day survey, trained and dedicated marine wildlife observers recorded 19 sightings of basking sharks (n=22 individuals). Of these observations, 17 were of single sharks, with one observation of two sharks and one observation of three sharks. All surface sightings occurred in water with depths between 129 and 199 m, predominantly prior to noon local time (79%), and were mostly of sharks 6-8 m in length, although a young (2 m) individual was also recorded. Breaching behaviour was observed on 14 occasions, by individuals or in small groups. Breaching has been proposed as a male-male competitive behaviour during courtship displays and female basking sharks may breach to signal their readiness for mating. Aggregations of basking sharks at frontal systems are well documented and linked to the occurrence of prey patches; however, these oceanographic features may also be of importance to courtship. The high number of sightings of sharks recorded during a relatively short time frame in addition to breaching behaviour and presence of young individuals, suggest that this area west of Shetland may be an important habitat for the basking shark

Predicting the impacts of climate change on a globally distributed species: the case of the loggerhead turtle

© Company of Biologists. Post print version deposited in accordance with SHERPA RoMEO guidelines. The definitive version is available at: http://jeb.biologists.org/content/213/6/901.shortMarine turtles utilise terrestrial and marine habitats and several aspects of their life history are tied to environmental features that are altering due to rapid climate change. We overview the likely impacts of climate change on the biology of these species, which are likely centred upon the thermal ecology of this taxonomic group. Then, focusing in detail on three decades of research on the loggerhead turtle (Caretta caretta L.), we describe how much progress has been made to date and how future experimental and ecological focus should be directed. Key questions include: what are the current hatchling sex ratios from which to measure future climate-induced changes? What are wild adult sex ratios and how many males are necessary to maintain a fertile and productive population? How will climate change affect turtles in terms of their distribution

LEADing together: Partnerships for a Healthier DeKalb

Background: In 2014, the DeKalb County Board of Health (DCBOH) received a three-year Racial and Ethnic Approaches to Community Health (REACH) grant to work with community partners to address health disparities among African Americans in DeKalb County. The project, called Local Efforts toward Addressing Disparities in DeKalb (LEAD DeKalb), relies on a network of partnerships to implement community-based interventions that promote healthy eating and physical activity among African Americans throughout low-income parts of DeKalb County. Methods: The evaluation team developed an online survey to assess LEAD DeKalb staff and partner satisfaction with the partnerships created and the work completed through LEAD DeKalb thus far (n=20, response rate of 71.4%). The 20-question survey was adapted primarily from two sources: the Wilder Collaboration Factors Inventory and the Program Sustainability Assessment Tool. Data analysis was limited to basic descriptive information such as frequencies, percentages, and averages, with comparisons made between DCBOH staff and partners. Results: Partners reported that their organization benefits from being involved in the partnership and attributed a variety of factors to the success of the partnership, including: bringing together diverse stakeholders; exchanging information/knowledge; sharing resources; and developing a shared mission and goals. Identifying new partners and developing a sustainability plan that includes funding, community support, and strong partnerships were identified as areas for improvement. Relevant qualitative findings from key informant interviews were also presented. Conclusions: Two main themes emerged from the data: (1) the network of partnerships is valuable and strong, but may benefit from new partners, and (2) resources (especially funding) are critical for implementing and sustaining the work of the partnership. Taken together, these findings suggest that partnerships are best conceptualized as ongoing processes rather than tasks to complete; and expanding social networks and learning communities allows partners to leverage social, human, and financial capital well beyond the grant period

Assessing the importance of Isle of Man waters for the basking shark Cetorhinus maximus

This is the final version. Available on open access from Inter Research via the DOI in this recordSatellite tracking of endangered or threatened animals can facilitate informed conservation by revealing priority areas for their protection. Basking sharks (Cetorhinus maximus, n=11) were tagged during the summers of 2013, 2015, 2016 and 2017 in the Isle of Man (IoM; median tracking duration 378 days (range: 89-804 days); median minimum straight-line distance travelled 541 km (range: 170-10,406 km). Tracking revealed three movement patterns: (i) coastal movements within IoM and Irish waters, (ii) summer northward movements to Scotland and Norway and (iii) international movements to Morocco and Norway. One tagged shark was bycaught and released alive in the Celtic Sea. Basking sharks displayed inter-annual site fidelity to the Irish Sea (n=3), a Marine Nature Reserve (MNR) in IoM waters (n=1), and Moroccan waters (n=1). Core distribution areas (50% kernel density estimation) of five satellite tracked sharks in IoM waters were compared with 3,902 public sightings between 2005 and 2017, highlighting West and South coast hotspots. Location data gathered from satellite tagging broadly corresponds to the current boundaries of MNRs in Manx waters. However, minor modifications of some MNR boundaries would incorporate ~20% more satellite tracking location data from this study, and protective measures for basking sharks in IoM waters could further aid conservation of the species at a local, regional and international scale. We also show the first documented movement of a basking shark from the British Isles to Norway, and the longest ever track for a tagged basking shark (two years and two months, 804 days)

Pinnipeds, people and photo identification: the implications of grey seal movements for effective management of the species

This is the author accepted manuscript. The final version is available from Cambridge University Press via the DOI in this record.Grey seals (Halichoerus grypus) of the North-east Atlantic are protected at designated European Marine Sites (Special Areas of Conservation, SACs) typically during their reproductive periods and in the UK at Sites of Special Scientific Interest (SSSI). As a mobile marine species, grey seals spend other parts of their annual life cycle in non-designated habitat. There is limited information on individual grey seal movements in south-west England. Citizen science photo identification (PID) revealed the movements of 477 grey seals at a regional scale (54 haul-outs up to 230 km apart) for over a decade. Reconstructed movements showed considerable individual variability. Four SACs were linked to up to 18 non-designated sites and two SSSIs in Cornwall were linked to a maximum of 41 non-designated sites. Observations support the value of existing SSSIs at both the well-connected West and North Cornwall sites. Thirteen Marine Protected Areas (MPAs) were visited by grey seals from four SACs and two SSSIs in Cornwall. As a mobile species, grey seals could be included in English MPA management plans. The application of functional linkage from SACs and SSSIs, informed by the movements evidenced in this research, could aid management efforts. This analysis reveals grey seal movements occur across a complex network of interconnected designated and non-designated sites that need to be managed holistically for this species for which the UK has a special responsibility

Pan-Atlantic analysis of the overlap of a highly migratory species, the leatherback turtle, with pelagic longline fisheries

Large oceanic migrants play important roles in ecosystems, yet many species are of conservation concern as a result of anthropogenic threats, of which incidental capture by fisheries is frequently identified. The last large populations of the leatherback turtle, Dermochelys coriacea, occur in the Atlantic Ocean, but interactions with industrial fisheries could jeopardize recent positive population trends, making bycatch mitigation a priority. Here, we perform the first pan-Atlantic analysis of spatio-temporal distribution of the leatherback turtle and ascertain overlap with longline fishing effort. Data suggest that the Atlantic probably consists of two regional management units: northern and southern (the latter including turtles breeding in South Africa). Although turtles and fisheries show highly diverse distributions, we highlight nine areas of high susceptibility to potential bycatch (four in the northern Atlantic and five in the southern/equatorial Atlantic) that are worthy of further targeted investigation and mitigation. These are reinforced by reports of leatherback bycatch at eight of these sites. International collaborative efforts are needed, especially from nations hosting regions where susceptibility to bycatch is likely to be high within their exclusive economic zone (northern Atlantic: Cape Verde, Gambia, Guinea Bissau, Mauritania, Senegal, Spain, USA and Western Sahara; southern Atlantic: Angola, Brazil, Namibia and UK) and from nations fishing in these high-susceptibility areas, including those located in international waters

Big catch, little sharks: Insight into Peruvian small-scale longline fisheries.

PublishedJournal ArticleThis is the final version of the article. Available from Wiley Open Access via the DOI in this record.Shark take, driven by vast demand for meat and fins, is increasing. We set out to gain insights into the impact of small-scale longline fisheries in Peru. Onboard observers were used to document catch from 145 longline fishing trips (1668 fishing days) originating from Ilo, southern Peru. Fishing effort is divided into two seasons: targeting dolphinfish (Coryphaena hippurus; December to February) and sharks (March to November). A total of 16,610 sharks were observed caught, with 11,166 identified to species level. Of these, 70.6% were blue sharks (Prionace glauca), 28.4% short-fin mako sharks (Isurus oxyrinchus), and 1% were other species (including thresher (Alopias vulpinus), hammerhead (Sphyrna zygaena), porbeagle (Lamnus nasus), and other Carcharhinidae species (Carcharhinus brachyurus, Carcharhinus falciformis, Galeorhinus galeus). Mean ± SD catch per unit effort of 33.6 ± 10.9 sharks per 1000 hooks was calculated for the shark season and 1.9 ± 3.1 sharks per 1000 hooks were caught in the dolphinfish season. An average of 83.7% of sharks caught (74.7% blue sharks; 93.3% mako sharks) were deemed sexually immature and under the legal minimum landing size, which for species exhibiting k-selected life history traits can result in susceptibility to over exploitation. As these growing fisheries operate along the entire Peruvian coast and may catch millions of sharks per annum, we conclude that their continued expansion, along with ineffective legislative approaches resulting in removal of immature individuals, has the potential to threaten the sustainability of the fishery, its target species, and ecosystem. There is a need for additional monitoring and research to inform novel management strategies for sharks while maintaining fisher livelihoods.We would like to thank the members of the fishing communities who participated in this study, in particular the fishers who were willing to have an observer onboard. We acknowledge Pro Delphinus staff: Bernedo, Cuentas, Lopez, and Mamani, for their help in data collection. We are thankful also to Pro Delphinus staff Natalia Ortiz and Nadia Balducci for support in data entry. This study was conducted in conjunction with and funded by the Darwin Initiative Sustainable Artisanal Fisheries Initiative in Peru and an initial grant from the Oak Foundation through Duke University. MJW was funded by PRIMaRE. JAS and JCM received support from ORSAS and University of Exeter, respectively

Monitoring global fishing activity in proximity to seamounts using automatic identification systems

This is the final version. Available on open access from Wiley via the DOI in this recordData availability statement: The fishing effort datasets that support the findings of this study are available at https://globalfishingwatch.org/datasets-and-code/fishing-effort/. The seamount distribution dataset that supports the findings of this study is available at https://doi.pangaea.de/10.1594/PANGAEA.921688Seamounts are prominent features of the seafloor that are often located in Areas Beyond National Jurisdiction (ABNJs). Whilst comprehensive biological information is lacking on most of these features, they have been recognised for hosting high biodiversity across multiple trophic levels. Technological advancements have enabled greater exploitation of biological resources further offshore with increasing concern over the long-term impacts of anthropogenic activities on vulnerable distant and deep-sea habitats. Analysis of ex situ vessel tracking technologies such as Automatic Identification Systems (AIS) have enabled spatial patterns of fishing activity to be monitored over large geographical areas. In this study, analysis of fishing activity within 30 km of seamount summits at the global scale found that these features within the waters of the Pacific Island Group and the Mediterranean Sea were subject to the highest levels of longlining and trawling activities respectively. Fishing in proximity to seamounts is dominated by the flag states of Taiwan, China, Japan, South Korea and Spain. Furthermore, our results reveal that the majority of sea areas managed by many Regional Fishery Management Organisations (RFMOs) have experienced increased fishing activity at seamounts compared to areas in the same ocean basin without management. This study demonstrates how free web-accessible data can be used to gain insights into remote areas where in situ research is prohibitively expensive and logistically challenging