Monitoring global fishing activity in proximity to seamounts using automatic identification systems

Fish and Fisheries, Journal Year: 2022, Volume and Issue: 23(3), P. 733 - 749

Published: Feb. 18, 2022

Abstract Seamounts are prominent features of the seafloor that often located in Areas Beyond National Jurisdiction (ABNJs). Whilst comprehensive biological information is lacking on most these features, they have been recognised for hosting high biodiversity across multiple trophic levels. Technological advancements enabled greater exploitation resources further offshore with increasing concern over long‐term impacts anthropogenic activities vulnerable distant and deep‐sea habitats. Analysis ex situ vessel tracking technologies such as Automatic Identification Systems (AIS) spatial patterns fishing activity to be monitored large geographical areas. In this study, analysis within 30 km seamount summits at global scale found waters Pacific Island Group Mediterranean Sea were subject highest levels longlining trawling respectively. Fishing proximity seamounts dominated by flag states Taiwan, China, Japan, South Korea Spain. Furthermore, our results reveal majority sea areas managed many Regional Fishery Management Organisations (RFMOs) experienced increased compared same ocean basin without management. This study demonstrates how free web‐accessible data can used gain insights into remote where research prohibitively expensive logistically challenging.

Language: Английский

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Relationships between pond water and tilapia skin microbiomes in aquaculture ponds in Malawi

Aquaculture, Journal Year: 2022, Volume and Issue: 558, P. 738367 - 738367

Published: May 21, 2022

Language: Английский

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Progress and Direction in the Use of Stable Isotopes to Understand Complex Coral Reef Ecosystems: A Review

CRC Press eBooks, Journal Year: 2022, Volume and Issue: unknown, P. 373 - 432

Published: Nov. 16, 2022

Coral reef ecosystems are exceptionally complex with a myriad of trophic pathways and consumer relationships.The application stable isotopes (SIs) offers numerous advantages over traditional methods towards understanding these intricate systems.We summarise current knowledge derived from the rapidly increasing SI literature base identify potential gaps future directions for use SIs in coral ecosystem studies.Using topic modelling, form text mining, on 236 identified published works, we determined that research reefs broadly falls into five major topics.(1) Organic matter dynamics: analyses (SIA) have quantified substantial variability autochthonous (internal) allochthonous (external) fluxes across reefs.(2) Holobiont metabolism: nutrient acquisition, translocation partitioning, responses to various endogenous exogenous factors been explored through SIA.(3) Trophic niches: SIA has indicated considerable variation resource facilitates cooccurrence high densities consumers, emphasising many categorisations often too simplistic.(4) Fish diet habitat connectivity: revealed how ontogenetic, larval mobile predator movements link adjacent ecosystems.(5) Environmental drivers (both natural anthropogenic): can track anthropogenic inputs, revealing impacts human-derived pollutants systems.There number important gaps, however.Few studies compare feeding strategies guilds, is biased fish hard corals.Furthermore, few examine multiple taxonomic groups situ or consider environmental drivers.Studies also tend ignore underlying, but potentially substantial, spatiotemporal baselines as demonstrated 741 mean values extracted literature, making inferences based small variations problematic.Given face global decline, need be addressed while acknowledging limitations SIA; careful enhance processes driving change iconic marine ecosystems.

Language: Английский

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The carrying capacity of the seas and oceans for future sustainable food production: Current scientific knowledge gaps

Food and Energy Security, Journal Year: 2023, Volume and Issue: 12(4)

Published: June 12, 2023

Abstract The expected increase in global food demand, as a consequence of rising and wealthier world population, an awareness the limits drawbacks modern agriculture, has resulted growing attention to potential seas oceans produce more food. capture production presently exploited marine fish stocks other species or less reached its maximum can only be slightly improved by better management. This leaves four alternative options open production: (1) manipulating entire web structure via removal high trophic level allow increasing exploitation low species, (2) harvesting so far unexploited stocks, such various from mesopelagic zone ocean larger zooplankton polar regions, (3) low‐trophic mariculture seaweeds herbivorous animals, (4) restoration impoverished coastal ecosystems artificially productivity ecological engineering. In this paper, we discuss these pay missing scientific knowledge needed assess their sustainability. To sustainability, it is prerequisite establish robust definitions assessments biological carrying capacity systems, but also necessary evaluate broader socio‐economic governance

Language: Английский

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Ecosystem‐level reference points: Moving toward ecosystem‐based fisheries management

Marine and Coastal Fisheries, Journal Year: 2024, Volume and Issue: 16(2)

Published: March 21, 2024

Abstract Objective To support the movement in marine fisheries management toward ecosystem‐based by exploring ecosystem‐level reference points (ELRPs) as an option for managing at ecosystem level. An ELRP is harvest level or indicator with one more associated benchmarks thresholds (i.e., targets, limits) to identify, monitor, maintain desirable conditions and functions. Methods This paper explores development implementation of ELRPs sustainability, help identify when changes that impact resources occur, foster discussions trade‐offs decisions. Result We organize existing potential into five categories (statistical analysis nonlinear dynamics tipping points, productivity, trophic information, biodiversity, human dimensions), provide overview analytical methods can estimate benchmarks, examples where are being used today, evaluate pros cons different categories. also attempt next steps scientists managers further science, development, application ELRPs. Conclusion Ecosystem‐level be a proactive accountability mechanism achieve objectives preferred operating space early warning (e.g., points) could imminent if current biological ecological trends system continue.

Language: Английский

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