I. Opstad

419 total citations
13 papers, 352 citations indexed

About

I. Opstad is a scholar working on Aquatic Science, Nature and Landscape Conservation and Physiology. According to data from OpenAlex, I. Opstad has authored 13 papers receiving a total of 352 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Aquatic Science, 5 papers in Nature and Landscape Conservation and 5 papers in Physiology. Recurrent topics in I. Opstad's work include Aquaculture Nutrition and Growth (13 papers), Fish Ecology and Management Studies (5 papers) and Reproductive biology and impacts on aquatic species (5 papers). I. Opstad is often cited by papers focused on Aquaculture Nutrition and Growth (13 papers), Fish Ecology and Management Studies (5 papers) and Reproductive biology and impacts on aquatic species (5 papers). I. Opstad collaborates with scholars based in Norway, India and Bulgaria. I. Opstad's co-authors include Kristin Hamre, Mari Moren, Karin Pittman, Anne Berit Skiftesvik, Øivind Bergh, Marit Espe, Jostein Solbakken, G.-I. HEMRE, Marc H.G. Berntssen and José‐Luis Zambonino‐Infante and has published in prestigious journals such as Aquaculture, Journal of Fish Biology and ICES Journal of Marine Science.

In The Last Decade

I. Opstad

13 papers receiving 324 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
I. Opstad Norway 10 308 134 129 86 67 13 352
Jostein Solbakken Norway 7 302 1.0× 165 1.2× 107 0.8× 88 1.0× 53 0.8× 9 377
Estíbaliz Díaz Spain 9 213 0.7× 101 0.8× 138 1.1× 61 0.7× 63 0.9× 16 347
J. Blom United States 11 398 1.3× 200 1.5× 183 1.4× 55 0.6× 26 0.4× 16 488
Ricardo C. Martino Brazil 12 395 1.3× 195 1.5× 207 1.6× 64 0.7× 60 0.9× 14 449
Rebeca Aneli Rueda-Jasso Mexico 5 322 1.0× 136 1.0× 215 1.7× 47 0.5× 27 0.4× 9 379
Jonathan C. Eya United States 12 345 1.1× 120 0.9× 177 1.4× 58 0.7× 30 0.4× 23 438
Brendan C. Delbos United States 11 360 1.2× 145 1.1× 227 1.8× 71 0.8× 62 0.9× 17 448
K. Hoehne‐Reitan Norway 10 374 1.2× 219 1.6× 159 1.2× 91 1.1× 48 0.7× 12 416
F.M. Rueda Spain 9 350 1.1× 139 1.0× 156 1.2× 45 0.5× 46 0.7× 10 383
K. Fukusho Japan 12 260 0.8× 140 1.0× 66 0.5× 68 0.8× 89 1.3× 26 344

Countries citing papers authored by I. Opstad

Since Specialization
Citations

This map shows the geographic impact of I. Opstad's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by I. Opstad with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites I. Opstad more than expected).

Fields of papers citing papers by I. Opstad

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by I. Opstad. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by I. Opstad. The network helps show where I. Opstad may publish in the future.

Co-authorship network of co-authors of I. Opstad

This figure shows the co-authorship network connecting the top 25 collaborators of I. Opstad. A scholar is included among the top collaborators of I. Opstad based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with I. Opstad. I. Opstad is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

13 of 13 papers shown
1.
Bogevik, André S., Katerina Kousoulaki, Anne Berit Skiftesvik, & I. Opstad. (2015). Fishmeal quality and ethoxyquin effects on the weaning performance of ballan wrasse (Labrus bergylta) larvae. Aquaculture Nutrition. 22(1). 46–50. 5 indexed citations
2.
Kousoulaki, Katerina, et al.. (2014). Marine raw material choice, quality and weaning performance of Ballan wrasse (Labrus bergylta) larvae. Aquaculture Nutrition. 21(5). 644–654. 10 indexed citations
3.
Moren, Mari, I. Opstad, Terje van der Meeren, & Kristin Hamre. (2006). Iodine enrichment of Artemia and enhanced levels of iodine in Atlantic halibut larvae (Hippoglossus hippoglossus L.) fed the enriched Artemia. Aquaculture Nutrition. 12(2). 97–102. 31 indexed citations
4.
Opstad, I., Jorma Suontama, Eyolf Langmyhr, & Rolf Erik Olsen. (2006). Growth, survival, and development of Atlantic cod (Gadus morhua L.) weaned onto diets containing various sources of marine protein. ICES Journal of Marine Science. 63(2). 320–325. 24 indexed citations
5.
Vidal, Marc, et al.. (2005). Design and synthesis of 14C-labelled proteins as tools for protein digestion studies in fish larvae. Aquaculture Nutrition. 11(6). 395–401. 9 indexed citations
6.
Moren, Mari, I. Opstad, Marc H.G. Berntssen, José‐Luis Zambonino‐Infante, & Kristin Hamre. (2004). An optimum level of vitamin A supplements for Atlantic halibut (Hippoglossus hippoglossus L.) juveniles. Aquaculture. 235(1-4). 587–599. 62 indexed citations
7.
Moren, Mari, I. Opstad, & Kristin Hamre. (2004). A comparison of retinol, retinal and retinyl ester concentrations in larvae of Atlantic halibut (Hippoglossus hippoglossus L.) fed Artemia or zooplankton. Aquaculture Nutrition. 10(4). 253–259. 20 indexed citations
8.
Hamre, Kristin, I. Opstad, Marit Espe, et al.. (2002). Nutrient composition and metamorphosis success of Atlantic halibut (Hippoglossus hippoglossus, L.) larvae fed natural zooplankton or Artemia. Aquaculture Nutrition. 8(2). 139–148. 89 indexed citations
9.
Opstad, I., Øivind Bergh, & Anne Berit Skiftesvik. (1998). Large-scale rearing of Atlantic halibut, Hippoglossus hippoglossus L., yolk sac larvae: effects of flow rate on growth, survival and accumulation of bacteria. Aquaculture Research. 29(12). 893–898. 8 indexed citations
10.
Skiftesvik, Anne Berit, Øivind Bergh, & I. Opstad. (1994). Activity and swimming speed at time of first feeding of halibut (Hippoglossus hippoglossus) larvae. Journal of Fish Biology. 45(2). 349–351. 11 indexed citations
11.
Pittman, Karin, et al.. (1990). Development of eggs and yolk sac larvae of halibut (Hippoglossus hippoglossus L.). Journal of Applied Ichthyology. 6(3). 142–160. 62 indexed citations
12.
Opstad, I., et al.. (1989). Fish roe as a major component in start-feed for marine fish larvae. Aquaculture. 79(1-4). 353–362. 12 indexed citations
13.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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