Results 21 to 30 of about 842,321 (247)
Reproductive performance links to fine-scale spatial patterns of female grey seal relatedness [PDF]
, 2001 Fine–scale spatial patterns of female relatedness throughout the established grey seal breeding colony of North Rona, Scotland, were investigated by accurate mapping and spatially explicit analyses of a large sample (n=262) of mothers using variation at ...
P. P. Pomeroy +11 more
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When aerial surveys won’t do:Grey seal pup production in cryptic habitats of Wales [PDF]
, 2014 Grey seals (Halichoerus grypus) are a species of conservation importance that require Marine Protected Area management and population status assessment under the EU Habitats and Species Directive. Aerial surveys are commonly used to monitor grey seal pup
Westcott, Stephen +4 more
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Fauna Norvegica, 1995 During surveys in the year 1989 - 91 approximately half of the breeding and moulting populations of harbour seal in Finnmark were located in the inner parts of Porsangerfjord and Laksefjord in central Finnmark. Grey seals were observed only occationally
Gunnar Henriksen
doaj +1 more source
Parasites & Vectors, 2021 Background Belonging to the anopluran family Echinophthiriidae, Echinophthirius horridus, the seal louse, has been reported to parasitise a broad range of representatives of phocid seals.
Jörg Hirzmann +7 more
doaj +1 more source
Animals, 2021 The prevalence of intestinal ulcers and parasites was investigated in 2172 grey seals (Halichoerus grypus) collected in the Baltic Sea and 49 grey seals collected outside the Baltic Sea (i.e., the Atlantic).
Bäcklin Britt-Marie +4 more
doaj +1 more source
Evaluation of changes in the behavior of the grey seal exposed to the electromagnetic field of extremely low frequencies (0.01–36 Hz) [PDF]
Vestnik MGTU, 2016 The paper presents the initial results of researching influence of low frequency electromagnetic field on the behavior of the grey seal. The authors have defined the frequency characteristics of the electromagnetic field which being exposed cause the ...
Yakovlev A. P. +2 more
doaj +1 more source
Flow-State Identification of Oil-Based Magnetic Fluid Seal Based on Acoustic Emission Technology
Frontiers in Materials, 2022 At present, most research studies on the changing process of the magnetic fluid seal are analyzed with the pressure signal of each chamber or the magnetic fluid flow photos taken by a camera, which need to change the seal structure.
Jinyu Xue +3 more
doaj +1 more source
Screening for Influenza and Morbillivirus in Seals and Porpoises in the Baltic and North Sea
Pathogens, 2023 Historically, the seals and harbour porpoises of the Baltic Sea and North Sea have been subjected to hunting, chemical pollutants and repeated mass mortalities, leading to significant population fluctuations. Despite the conservation implications and the
Iben Stokholm +10 more
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Seal-induced losses and successful mitigation using Acoustic Harassment Devices in Estonian Baltic trap-net fisheries [PDF]
Proceedings of the Estonian Academy of Sciences, 2021 During the last decades the number of grey seals Halichoerus grypus has increased more than tenfold in the Baltic Sea, having reached 38 000 in 2019, which has created increasing problems to the coastal fisheries.
Markus Vetemaa +8 more
doaj +1 more source
Grey seal maternal attendance patterns are affected by water availability on North Rona, Scotland [PDF]
, 2001 Previous studies on grey seals (Halichoerus grypus) have shown that pools of water influence female distribution within inland breeding colonies. This study reveals that the availability of pools also affects maternal attendance patterns and may have ...
Paula Redman +8 more
core +1 more source