WebJan 1, 2013 · Since the revolutionary 1998 study “Fishing Down the Marine Food Web” was published, worldwide concern has been expressed regarding the appropriate way to manage ever-changing worldwide fisheries [1], [2]. Government and environmental organizations alike have accepted the idea of fishing down the food web as doctrine … In 2000, the Convention on Biological Diversity, an international treaty aimed at sustaining biodiversity which has been adopted by 193 member countries, selected the mean trophic level of fisheries catch as one of eight indicators for immediate testing. They renamed it the "Marine Trophic Index" (MTI), and have mandated that member countries report over time on changes in ocean trophic levels as a primary indicator of marine biodiversity and health.
Fishing down then up the food web of an invaded lake PNAS
WebJan 1, 2013 · Fishing down is the scenario originally outlined by Pauly et al. where target catch is determined by a sequential catch and replace methodology, thus moving down the food web. Fishing through is the scenario proposed by Essington et al., where there is a sequential addition of lower trophic level species rather than a collapse of high-level stocks. WebJun 5, 2012 · This decline was observed for global marine catches as well as for the majority of the different FAO subareas of the Atlantic, Indian, and Pacific Oceans, and … ionotropic serotonin receptors
Fishing Down Marine Food Webs Science
WebSep 16, 2024 · This effect, described as fishing down the marine food web, arises if the biomass of long-lived, large, and piscivorous species declines more rapidly than smaller species with higher natural mortality . Over time, catches can switch from being dominated by top predators to an increased prevalence of planktivorous fish or invertebrates. WebMay 1, 2008 · In this paper, using catch time series spanning over 66 years (1950–2016) and biological data for 67 marine species/groups, we estimate mean trophic level (MTL), fishing-in-balance (FiB) and region-based MTL (RMTL) indicators to examine the effects of fishing down marine food webs while considering the geographical expansion of Iran's ... WebSheepshead ( Archosargus probatocephalus ), a marine fish cosmopolitan to coastal eastern North America, is emblematic of the fishing down the food web phenomenon in the Atlantic United States and Gulf of Mexico. Sheepshead are highly adaptable, allowing them to thrive in a wide range of coastal habitats, from freshwater to salt water. ionotech.de