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

2020 ◽  
Vol 41 ◽  
pp. 209-223
Author(s):  
HR Dolton ◽  
FR Gell ◽  
J Hall ◽  
G Hall ◽  
LA Hawkes ◽  
...  

Satellite 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 d, range: 89-804 d; median minimum straight-line distance travelled 541 km, range: 170-10406 km). Tracking revealed 3 movement patterns: (1) coastal movements within IoM and Irish waters, (2) summer northward movements to Scotland and (3) 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 5 satellite tracked sharks in IoM waters were compared with 3902 public sightings between 2005 and 2017, highlighting west and south coast hotspots. Location data gathered from satellite tagging broadly correspond to the current boundaries of MNRs in IoM 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 local, regional and international scales. 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 (2 yr and 2 mo, 804 d).

2000 ◽  
Vol 39 (2) ◽  
pp. 217-240 ◽  
Author(s):  
John Belchem

As imperial pride flourished in the racial discourse of late Victorian British politics, ethnic revival and Celtic nationalism also gained purchase and resonance. These complex and seemingly competing issues of identity extended beyond the “four nations” of the United Kingdom to the Isle of Man, a crown dependency constitutionally outside the United Kingdom but at the very center of the British Isles. In this “land of home rule,” adrift in the Irish Sea, the juxtaposition of Britishness and Celticism was particularly acute, compounded by the proud persistence of Norse traditions. Manx independence within the Atlantic archipelago was symbolized by the annual Tynwald Day ceremony, a Viking “Thing” or general meeting, at which the year's new legislation was promulgated in both English and Manx Gaelic. In the late Victorian period, as Anglo-Manx business syndicates invested heavily in the “visiting industry,” transforming the island into “one large playground for the operatives of Lancashire and Yorkshire,” gentlemanly antiquarians constructed (and/or invented) the necessary traditions to safeguard Manx cultural distinctiveness and its devolved political status. Through the assertion of Celticism, a project that tended to downgrade Norse contributions to the island's past, the little Manx nation girded itself against cultural anglicization, yet remained unquestionably loyal to the British empire.Slightly other than English, the Manx have displayed what Sir Frank Kermode has described as “mild alienation” and “qualified foreignness,” characteristics that need to be considered in the wider debate about British identity.


Author(s):  
Vicki Cummings

The transition from the Mesolithic to the Neolithic in Britain and Ireland remains one of the most debated and contested transitions of prehistory. Much more complex than a simple transition from hunting and gathering to farming, the Mesolithic–Neolithic transition in Britain has been discussed not only as an economic and technological transformation, but also as an ideological one. In western Britain in particular, with its wealth of Neolithic monuments, considerable emphasis has been placed on the role of monumentality in the transition process. Over the past decade the author‧s research has concentrated on the early Neolithic monumental traditions of western Britain, a deliberate focus on areas outside the more ‘luminous’ centres of Wessex, the Cotswold–Severn region, and Orkney. This chapter discusses the transition in western Britain, with an emphasis on the monuments of this region. In particular, it discusses the areas around the Irish Sea – west Wales, the Isle of Man, south-west and western Scotland – as well as referring to the sequence on the other side of the Irish Sea, specifically eastern Ireland.


Author(s):  
David M. Wilson

This chapter examines the influences in the early sculpture in the Isle of Man, particularly the crosses that were previously described as Celtic. It suggests that the inscriptions in the Manx sculpture epigraphically and linguistically relate the island to the lands round the Irish Sea, while their typology and style history provide rough chronological yardsticks. The findings reveal that most pre-Viking memorial stones can be found in cemeteries on the sites of keeills.


Author(s):  
J. B. Sykes ◽  
A. D. Boney

Until recently there has been very little information on the quantities of phytoplankton nutrients in the Irish Sea. Slinn (1958–1966) has reported the weekly variations in the nutrient concentrations at a station off Port Erin, Isle of Man, and studies on the nutrient conditions in the Menai Straits have been carried out by Jones (unpublished) and Ewins & Spencer (1967). Liss (1969) has reported on the results of winter surveys of reactive silicate near the Irish coast, and from three stations near the Welsh coast (Anglesey, the Lleyn Peninsula and Fishguard). The present paper describes studies carried out in the inshore waters near Aberystwyth in Cardigan Bay during 1967 and 1968. This investigation formed part of a study of the seasonal occurrence of the phytoplankton and the growth conditions in this shallow, inshore region.


Author(s):  
Fiona Stafford

This chapter considers the places where rivers meet the sea, and the imaginative, anthropomorphic impulses evident in the language of confluence. In particular, it focuses on the Solway Firth, and its peculiar situation as a border between England and Scotland, opening towards the Isle of Man, Ireland, Wales, and the rest of the world. The purpose of the regional focus is to show the constant interaction of history and geography and the associated shifts in understanding the coast. Taking its cue from John Ruskin’s claim for the international importance of the Solway, the chapter explores Ruskin’s own attachment to the area, magnified as it was by Scott, Burns, and Wordsworth. It goes on to consider Ciaran Carson’s thoughtful response to Ruskin’s description in Praeterita, when Carson imagines Ruskin crossing the Irish Sea to encounter modern Belfast.


Author(s):  
C. Bird ◽  
G. J. Burt ◽  
N. Hampton ◽  
S. R. McCully Phillips ◽  
J. R. Ellis

AbstractDespite increased focus on ascertaining the status of elasmobranch fish, the stock units for many species are uncertain. Data from mark-recapture tagging studies undertaken from 1959–2017 were analysed for 13 batoid species. Data were most comprehensive for skates (Rajidae), with 22,374 released and 3342 (14.9%) returned. Most data related to thornback ray Raja clavata, blonde ray R. brachyura and spotted ray R. montagui. Tags were generally returned from areas less than 50 km from their release, and usually from the ICES Division in which they were released. However, straight-line distances travelled of up to 910 km (R. brachyura) and 772 km (R. clavata) were recorded, highlighting that individual skates are capable of longer-distance movements. The maximum time at liberty was 16.6 years (R. clavata). Whilst mark-recapture data indicated that the current stock units used by ICES are broadly appropriate, southward movements of several skate species tagged off Northern Ireland (Division 6.a) to the Irish Sea (Division 7.a) were observed. In contrast, skates tagged in the Irish Sea and Bristol Channel (Division 7.f) generally remained in that area, with only occasional recaptures from Division 6.a.


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