2019
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Laksekvoter for fiskesæsonen 2019

År: 2019

Laksekvoter for fiskesæsonen 2019

Sivebæk, F., Eg Nielsen, E. & Koed, A. 2019

Research output: CommunicationNet publication - Internet publication – Annual report year: 2019

Original languageDanish
Publication date2019
StatePublished - 2019

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Impact of structural habitat modifications in coastal temperate systems on fish recruitment: a systematic review

År: 2019

Impact of structural habitat modifications in coastal temperate systems on fish recruitment: a systematic review

Macura, B., Byström, P., Airoldi, L., Eriksson, B. K., Rudstam, L. & Støttrup, J. G. 2019 In : Environmental Evidence. 8, 1, 14

Research output: Research - peer-reviewJournal article – Annual report year: 2019

Abstract Background Shallow nearshore marine ecosystems are changing at an increasing rate due to a range of human activities such as urbanisation and commercial development. As a result, an increasing number of structural modifications occur in coastal nursery and spawning habitats of fish. Concomitant to this increase, there have been declines in many coastal fish populations and changes in the composition of fish communities. As requested by Swedish stakeholders, this review aimed to synthesise scientific evidence of the impact on fish recruitment of structural modifications in temperate coastal areas. Methods We searched for peer-reviewed and grey literature on such impacts in English, Dutch, Danish, Finnish, German, Swedish and Spanish. Searches were performed in bibliographic databases, specialist websites, bibliographies of review articles. We also contacted stakeholder to find relevant literature. Eligible studies included small- and large-scale field studies in marine systems and large lakes (> 10,000 km2) in temperate regions of the Northern and Southern Hemispheres. Included replicated comparisons of fish recruitment between altered and unaltered control areas, comparisons before and after an alteration, or both. Relevant outcomes (response variables) included measures of recruitment defined as abundance of juvenile fish in coastal habitats. All fish species were considered. Articles were screened for eligibility by title, abstract and full text. Eligible studies were critically appraised based on their external and internal validity. From each eligible study of sufficient validity, we extracted information on study design, measured outcomes, exposure, type of comparator, effect modifiers and study findings. Study findings were synthesised narratively. Results We searched for eligible studies in 15 databases, 24 specialist websites, Google Scholar, and bibliographies of 11 review articles. The review finally included 37 studies that were eligible and of sufficient validity to be considered for final synthesis. Most studies (23 of 37) were from the Northern Hemisphere. Studies varied in design, spatial resolution, target fish species, and type of structural habitat change. This high level of variation did not allow for a quantitative synthesis and prevented us from drawing general conclusions on the impact of structures or structural modifications on fish recruitment. In this review we provide a narrative synthesis of the evidence base and classify eligible studies into six categories (based on type of exposure and comparator). The categories are as follows: the impacts on fish recruitment of: (1) artificial structures in coastal areas, (2) structures designed as fish attractors, (3) large scale urban sprawl, (4) ‘novel’ habitats, (5) habitat loss, and (6) restoration. Conclusions This review revealed a very limited evidence base for how structural modifications and marine urban sprawl can affect fish recruitment. Thus, there is a substantial mismatch between stakeholder needs and research evidence. Further, the impact and ecological performance of artificial structures depend both on context and species. Clearly, there is a need for more research on the subject, especially on long-term consequences at larger spatial scales.
Original languageEnglish
Article number14
JournalEnvironmental Evidence
Volume8
Issue number1
ISSN2047-2382
DOIs
StatePublished - 2019

 

Survival of discarded plaice ( Pleuronectes platessa ) from Norway lobster ( Nephrops norvegicus ) otter-trawl fishery

År: 2019

Survival of discarded plaice ( Pleuronectes platessa ) from Norway lobster ( Nephrops norvegicus ) otter-trawl fishery

Eskelund, M., Methling, C., Skov, P. V. & Madsen, N. 2019 (Accepted/In press) In : Journal of Applied Ichthyology.

Research output: Research - peer-reviewJournal article – Annual report year: 2019

The introduction of landing obligations in the European Union common fisheries policy, has increased the focus on discard survival. Since species with scientifically proven high survival rates may be exempted from the landing obligations, the economic significance for the fishing industry is large. Landing obligations include individuals below the minimum conservation reference size (MCRS), which are not allowed to be sold for human consumption. The Norway lobster (Nephrops norvegicus) fishery is a high value fishery, but with a substantial amount of bycatch of plaice (Pleuronectes platessa) below the MCRS. In the present study, observations were made on the short‐term survival of plaice at or below the MCRS, discarded from a small otter board trawler targeting Nephrops in Skagerrak (ICES 3a). The average short‐term survival of plaice was 15% at haul level, ranging from 0% to 39%, after 10 days of captive observation. Survival significantly decreased with time on deck and the retention of debris in the codend (p < 0.0001), while survival was not correlated to size. Vitality assessments, using a combined reflex impairment and injury score, were tested as predictor of survival and were significantly associated to survival (p < 0.0001) both for individual fish and when grouped by hauls. Seabird predation behaviour was assessed and it was estimated that seabirds predated or pursued 85% of discarded plaice below the MCRS.
Original languageEnglish
JournalJournal of Applied Ichthyology
ISSN0175-8659
DOIs
StateAccepted/In press - 2019

 

The effect of dietary n-3 LC-PUFA on the responses to acute and prolonged stress of meagre (Argyrosomus regius, Asso 1801) juveniles

År: 2019

The effect of dietary n-3 LC-PUFA on the responses to acute and prolonged stress of meagre (Argyrosomus regius, Asso 1801) juveniles

Carvalho, M., Montero, D., Gesto, M., Lencina, A., Lund, I. & Izquierdo, M. 2019 (Accepted/In press) In : Aquaculture.

Research output: Research - peer-reviewJournal article – Annual report year: 2019

Original languageEnglish
JournalAquaculture
ISSN0044-8486
StateAccepted/In press - 2019

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Detection of Co-expressed Pathway Modules Associated With Mineral Concentration and Meat Quality in Nelore Cattle

År: 2019

Detection of Co-expressed Pathway Modules Associated With Mineral Concentration and Meat Quality in Nelore Cattle

Diniz, W. J. S., Mazzoni, G., Coutinho, L. L., Banerjee, P., Geistlinger, L., Cesar, A. S. M., Bertolini, F., Afonso, J., de Oliveira, P. S. N., Tizioto, P. C., Kadarmideen, H. & Regitano, L. C. A. 2019 In : Frontiers in Genetics. 10, 12 p., 210

Research output: Research - peer-reviewJournal article – Annual report year: 2019

Meat quality is a complex trait that is influenced by genetic and environmental factors, which includes mineral concentration. However, the association between mineral concentration and meat quality, and the specific molecular pathways underlying this association, are not well explored. We therefore analyzed gene expression as measured with RNA-seq in Longissimus thoracis muscle of 194 Nelore steers for association with three meat quality traits (intramuscular fat, meat pH, and tenderness) and the concentration of 13 minerals (Ca, Cr, Co, Cu, Fe, K, Mg, Mn, Na, P, S, Se, and Zn). We identified seven sets of co-expressed genes (modules) associated with at least two traits, which indicates that common pathways influence these traits. From pathway analysis of module hub genes, we further found an over-representation for energy and protein metabolism (AMPK and mTOR signaling pathways) in addition to muscle growth, and protein turnover pathways. Among the identified hub genes FASN, ELOV5, and PDE3B are involved with lipid metabolism and were affected by previously identified eQTLs associated to fat deposition. The reported hub genes and over-represented pathways provide evidence of interplay among gene expression, mineral concentration, and meat quality traits. Future studies investigating the effect of different levels of mineral supplementation in the gene expression and meat quality traits could help us to elucidate the regulatory mechanism by which the genes/pathways are affected.
Original languageEnglish
Article number210
JournalFrontiers in Genetics
Volume10
Number of pages12
ISSN1664-8021
DOIs
StatePublished - 2019