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- Nissling, Anders, et al.
(författare)
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Egg production of turbot, Scophthalmus maximus, in the Baltic Sea
- 2013
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Ingår i: Journal of Sea Research. - : Elsevier. - 1385-1101 .- 1873-1414. ; 84, s. 77-86
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Tidskriftsartikel (refereegranskat)abstract
- In the brackish water Baltic Sea turbot spawn at ~6–9 psu along the coast and on offshore banks in ICES SD 2324–29, with salinity influencing the reproductive success. The potential fecundity (the stock of vitellogenic 24oocytes in the pre-spawning ovary), egg size (diameter and dry weight of artificially fertilized 1-day-old 25eggs) and gonad dry weight were assessed for fish sampled in SD 25 and SD 28. Multiple regression analysis 26identified somatic weight, or total length in combination with Fulton's condition factor, as main predictors of 27fecundity and gonad dry weight with stage of maturity (oocyte packing density or leading cohort) as an ad- 28ditional predictor. For egg size, somatic weight was identified as main predictor while otolith weight (proxy 29for age) was an additional predictor. Univariate analysis using GLM revealed significantly higher fecundity 30and gonad dry weight for turbot from SD 28 (3378–3474 oocytes/g somatic weight) compared to those 31from SD 25 (2343 oocytes/g somatic weight), with no difference in egg size (1.05±0.03 mm diameter and 3246.8±6.5 μg dry weight; mean±sd). The difference in egg production matched egg survival probabilities 33in relation to salinity conditions suggesting selection for higher fecundity as a consequence of poorer repro- 34ductive success at lower salinities. This supports the hypothesis of higher size-specific fecundity towards the 35limit of the distribution of a species as an adaptation to harsher environmental conditions and lower offspring 36survival probabilities. Within SD 28 comparisons were made between two major fishing areas targeting 37spawning aggregations and a marine protected area without fishing. The outcome was inconclusive and is 38discussed with respect to potential fishery induced effects, effects of the salinity gradient, effects of specific 39year-classes, and effects of maturation status of sampled fish.
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| 3. |
- Ovesen, C., et al.
(författare)
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Feasibility of endovascular and surface cooling strategies in acute stroke
- 2013
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Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 1600-0404 .- 0001-6314. ; 127:6, s. 399-405
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Tidskriftsartikel (refereegranskat)abstract
- Background Therapeutic hypothermia (TH) is a promising treatment of stroke, but limited data are available regarding the safety and effectiveness of cooling methodology. We investigated the safety of TH and compared the cooling capacity of two widely used cooling strategies endovascular and surface cooling. Methods COOLAID Oresund is a bicentre randomized trial in Copenhagen (Denmark) and Malmo (Sweden). Patients were randomized to either TH (33 degrees C for 24h) in a general intensive care unit (ICU) or standardized stroke unit care (control). Cooling was induced by a surface or endovascular-based strategy. Results Thirty-one patients were randomized. Seven were cooled using endovascular and 10 using surface-based cooling methods and 14 patients received standard care (controls). 14 (45%) patients received thrombolysis. Pneumonia was recorded in 6 (35%) TH patients and in 1 (7%) control. 4 TH patients and 1 control developed massive infarction. 1 TH patient and 2 control suffered asymptomatic haemorrhagic transformation. Mortality was comparable with 2 (12%) in the TH group and 1 (7%) among controls. Mean (SD) duration of hospital stay was 25.0days (24, 9) in TH and 22.5days (20.6) in control patients (P=0.767). Mean (SD) induction period (cooling onset to target temperature) was 126.3min (80.6) with endovascular cooling and 196.3min (76.3) with surface cooling (P=0.025). Conclusions Therapeutic hypothermia with general anaesthesia is feasible in stroke patients. We noticed increased rates of pneumonia, while the length of hospital stay remained comparable. The endovascular cooling strategy provides a faster induction period than surface cooling.
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