Results 41 to 50 of about 27,615 (267)
Ecosystem Impacts of the Landing Obligation for Unwanted Catch in Thermaikos Gulf (Greece)
Fisheries Management and Ecology, EarlyView.ABSTRACT Discards by marine commercial fisheries have been an issue of major concern to the scientific community in recent years. We modeled the ecological and trophic consequences of a mandatory landing obligation (LO) regulated by the reformed Common Fisheries Policy [Regulation (EU) 1380/2013] on the Thermaikos Gulf ecosystem (northwestern Aegean ...
Ioannis Keramidas +3 more
wiley +1 more source
Freshwater Biology, Volume 71, Issue 2, February 2026.ABSTRACT Invasive non‐native species threaten freshwater ecosystems, disrupting the functioning and structure of the food chain and potentially leading to biodiversity loss. As omnivores, crayfish can modify their environment, directly affecting organisms such as macroinvertebrates.
António Barbosa Nogueira +5 more
wiley +1 more source
A study on the mercury content in muscles in the fish family Carangidae from the fishing grounds off the coast of north-west Africa [PDF]
Acta Ichthyologica et Piscatoria, 1976 The mercury content in muscles was determined for 171 fishes belonging to three species of the family Carangidae. Significant differences in the content of this element were found between the species.
A. Chodyniecki +3 more
doaj +3 more sources
Biologie des Stöckers in Nordsee und Nordostatlantik [PDF]
, 1999 This paper summarises the current knowledge on horse mackerel (Trachurus trachurus) biology. The synopsis is mainly based on the report of a recently conducted EU funded workshop on horse mackerel age reading.
Hammer, Cornelius +1 more
core
Day-night differences in Cunene horse mackerel (Trachurus trecae) acoustic relative densities off Angola [PDF]
, 2010 The assessment and the management of the Cunene horse mackerel in Angola rely heavily on abundance estimates from hydroacoustic surveys. Acoustic data collected from 1994 to 1999 were analysed to quantify diurnal variation in relative acoustic densities ...
Axelsen, Bjorn Erik +2 more
core +2 more sources
Aquatic Living Resources, 2018 The Atlantic horse mackerel, Trachurus trachurus, is a commercially important species whose daily spawning dynamics are not yet fully understood. Existence of spawning synchronicity would facilitate application of the daily egg production method for ...
Mouchlianitis Foivos Alexandros +4 more
doaj +1 more source
Biological characteristic of Polish catches of the horse mackerel - Trachurus trachurus capensis Castelnau, 1861 in the region of the South-West African shelf [PDF]
Acta Ichthyologica et Piscatoria, 1975 This paper contains a short estimate of catches with regard to the yield and specific composition shown against the background of occurring depths and water temperatures; it presents results of the analysis of length and age composition as well as those ...
A. Kompowski, W. Ślósarczyk
doaj +3 more sources
Historical background to the South African horse mackerel fishery and its management [PDF]
, 2016 The commercial fishery for the South African horse mackerel Trachurus capensis began in 1950. Horse mackerel are exploited by four fleets: purse-seine, offshore demersal, inshore demersal, and midwater trawl.
Butterworth, Doug S +2 more
core
Journal of Geophysical Research: Oceans, Volume 131, Issue 1, January 2026.Abstract Zooplanktonic organisms are considered a key link between different trophic levels. The ecosystem structure and dynamics are affected by changes in their population and phenology. In this work, the causes and timing of changes within the seasonal cycle of zooplankton biomass vertical distribution in oceanic waters of the Bay of Biscay were ...
L. Ibáñez‐Tejero +5 more
wiley +1 more source
Atlantic Herring and Horse Mackerel in 6aS/7b; Industry Acoustic Survey Cruise Report [PDF]
, 2018 An acoustic survey of Atlantic herring Clupea harengus and horse mackerel Trachurus trachurus was conducted in ICES areas 6aS/7b in Nov 2017 using the pair trawl vessels MFV Eilean Croine S238 and MFV Sparkling Star D437.
Clarke, M. +3 more
core