| trichinella nativa in grey seal halichoerus grypus - spill-over from a highly endemic terrestrial ecosystem. | abstract trichinella infections of marine mammals pose a human health risk in arctic regions where game meat is important part of the diet. in the last decade, the grey seal population of the subarctic baltic sea has reached a level at which hunting is possible and seal meat is now available for food. we conducted a survey on the occurrence of trichinella spp. in grey seals halichoerus grypus (n = 171) and ringed seals phoca hispida botnica (n = 56) of the baltic sea in the coastal waters of fin ... | 2011 | 21506828 |
| renal lesions in baltic grey seals (halichoerus grypus) and ringed seals (phoca hispida botnica). | a severe reduction in the populations of grey and ringed seals in the baltic occurred during the 1960s and 1970s. adult animals showed (and still show) a series of lesions inter alia in the female reproductive organs, intestines, integument, kidneys, adrenals, and skulls (the baltic seal disease complex). the morphology and prevalence of light microscopic changes in the kidneys of 76 grey seals and 29 ringed seals collected in the baltic proper and the gulf of bothnia during 1977-1996 are presen ... | 2001 | 11795214 |
| fatty acid composition in liver and blubber of the saimaa ringed seal (phoca hispida saimensis) compared with that of the ringed seal (phoca hispida botnica) and grey seal (halichoerus grypus from the baltic. | 1. the main differences in fatty acid composition of blubber between the saimaa seal (phoca hispida saimensis) and the baltic seals (phoca hispida botnica and halichoerus grypus) were, that in fresh water the proportions of polyunsaturated c18 acids and arachidonic acid (20:4 omega 6) were high. 2. the trend became more evident when data on ringed seals from northern oceans were compared with the present data. 3. the proportions of exogenous 20:1 and 22:1 were extremely low in ringed seals from ... | 1993 | 8365111 |
| chromosome survey of seals in the baltic sea in 1988-1992. | the populations of grey seals (halichoerus grypus) and ringed seals (phoca hispida botnica) in the baltic sea have decreased very much, especially during the last decades. environmental pollution has been seen as an important cause. as top predators, the seals accumulate pollutants from their environment. high concentrations of chlorinated hydrocarbons and heavy metals have been found in seals from the baltic sea. in the present study the possible mutagenic effects of environmental pollutants on ... | 1996 | 8854834 |
| bone-related effects of contaminants in seals may be associated with vitamin d and thyroid hormones. | the high levels of polychlorinated biphenyls (pcbs) and ddt in gray seal (halichoerus grypus) and ringed seal (phoca hispida botnica) in the baltic sea have been associated with pathological disruptions, including bone lesions and reproductive failures. the underlying environmental and toxicological mechanisms leading to these pathological changes are not yet fully understood. the present study investigated the relationship between the individual contaminant load and bone- and thyroid-related ef ... | 2008 | 18333671 |
| simulated distributions of baltic sea-ice in warming climate and consequences for the winter habitat of the baltic ringed seal. | sea-ice in the baltic sea in present and future climates is investigated. the rossby centre regional atmosphere-ocean model was used to perform a set of 30-year-long time slice experiments. for each of the two driving global models hadam3h and echam4/opyc3, one control run (1961-1990) and two scenario runs (2071-2100) based upon the sres a2 and b2 emission scenarios were conducted. the future sea-ice volume in the baltic sea is reduced by 83% on average. the bothnian sea, large areas of the gulf ... | 2004 | 15264604 |
| identifying foraging habitats of baltic ringed seals using movement data. | identification of key foraging habitats of aquatic top predators is essential for designing effective management and conservation strategies. the baltic ringed seal (phoca hispida botnica) interacts with anthropogenic activities and knowledge of its spatial ecology is needed for planning population management and mitigating interactions with coastal fisheries. we investigated habitat use and foraging habitats of ringed seals (n = 26) with satellite telemetry in the northern baltic sea during aut ... | 2015 | 26401285 |
| mercury, cadmium, lead and selenium in ringed seals (phoca hispida) from the baltic sea and from svalbard. | the concentrations of mercury (hg), cadmium (cd), lead (pb) and selenium (se) were determined in liver, kidney and muscle samples from 20 baltic ringed seals (phoca hispida botnica) (3-32 years), and from 17 ringed seals (phoca hispida) (0-20 years) from svalbard, in the arctic. the concentrations of hg and se were considerably higher in the baltic ringed seals, but the cd concentrations lower than in the svalbard ringed seals. there was no big geographical difference with respect to pb concentr ... | 2001 | 11202754 |
| linking climate trends to population dynamics in the baltic ringed seal: impacts of historical and future winter temperatures. | a global trend of a warming climate may seriously affect species dependent on sea ice. we investigated the impact of climate on the baltic ringed seals (phoca hispida botnica), using historical and future climatological time series. availability of suitable breeding ice is known to affect pup survival. we used detailed information on how winter temperatures affect the extent of breeding ice and a climatological model (rca3) to project the expected effects on the baltic ringed seal population. th ... | 2012 | 22851349 |
| a novel tool to mitigate by-catch mortality of baltic seals in coastal fyke net fishery. | developing methods to reduce the incidental catch of non-target species is important, as by-catch mortality poses threats especially to large aquatic predators. we examined the effectiveness of a novel device, a "seal sock", in mitigating the by-catch mortality of seals in coastal fyke net fisheries in the baltic sea. the seal sock developed and tested in this study was a cylindrical net attached to the fyke net, allowing the seals access to the surface to breathe while trapped inside fishing ge ... | 2015 | 25993534 |