Making do with less: Extending an acoustic-based time series of euphausiid abundance using an uncrewed surface vehicle with fewer frequencies

Fisheries Research, Journal Year: 2025, Volume and Issue: 282, P. 107270 - 107270

Published: Jan. 21, 2025

Language: Английский

Gap analysis and review of survey effort disruption in North Sea and North-eastern Atlantic bottom trawl surveys

ICES Journal of Marine Science, Journal Year: 2025, Volume and Issue: 82(2)

Published: Feb. 1, 2025

Abstract Fisheries-independent surveys are essential to stock assessment, providing estimates on relative abundance, distribution, and biology of commercially fished species. Environmental, mechanical, logistical issues can disrupt survey operation reduce effort. We synthesized causes disruptions using 25 years publicly available records for North Sea North-eastern Atlantic bottom trawl operations. assigned each recorded disruption one three categories: Spatial—long-term (e.g. windfarms, marine protected areas), Spatial—short-term fisheries, legal issues), random spatial processes weather mechanical issues). Furthermore, we analysed spatiotemporal patterns effort targets identified in the protocols North-East Atlantic. Lastly, conducted a case study Irish (IGFS) explore effect weather, time, geographic position probability sampling an IGFS station binomial generalized additive model. On average, number stations sampled was lower than indicated protocol surveys. Weather had consistent effects all surveys, implying that their designs vulnerable influence environmental factors. However, neither storminess (using wave height as proxy) nor location reliable predictor survey. provide framework analysing robustness disruption. Our approach could be used future monitor changes relation protocols, facilitating critical evaluation design efficacy.

Language: Английский

Limited Evidence Base for Determining Impacts (Or Not) of Offshore Wind Energy Developments on Commercial Fisheries Species

Fish and Fisheries, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

ABSTRACT The coexistence between offshore wind and fisheries has raised questions about potential impacts on species that are fished. We systematically evaluated the farm (OWF) literature for evidence of effects leading to commercial species. First, we collated environmental OWFs then determined whether these could be interpreted as using fishery‐scale organism‐scale parameters pelagic finfish, demersal reef‐associated roundfish, flatfish, elasmobranchs shellfish. appraised consistency level agreement direct explored body indirect evidence. A total 1268 documents featured OWF species, with only 60 (274 records) providing Evidence finfish far outweighed Demersal roundfish were best‐studied group, while poorly evidenced. Most studies considered population rather than stock parameters. There was limited impacts, owing inconclusive results inconsistent within assessed—illustrating importance looking across base focussing individual studies. Hence, there is currently insufficient confidently determine Overwhelmingly, deals effects, although should not disregarded they can highlight plausible which guide research monitoring targeted at understanding OWF—a pressing concern given increased policy commitment many nations two marine sectors sharing space.

Language: Английский