Does trawl fisheries affect the diet of fishes? A stable isotope analysis approach

Fish functional diversity as an indicator of resilience to industrial fishing in Patagonia Argentina

“…The dominant species of intermediate and high trophic levels of this study (from 3.4 to 4.5) also use more than one area in the Beukhof et al, 2019;Jennings et al, 2002). The temporal reductions in fish community body size, reproductive ratio and trophic level align well with the decreased community fish body size because of the high incidental capture of large cartilaginous fishes in the SJG by trawling during the last two decades (Funes et al, 2019;Ruibal Núñez, 2020).…”

“…Industrial fisheries of M. hubbsi and P. muelleri incidentally capture 101 fish species, including 69 Osteichthyes, 29 Chondrichthyes and 3 Agnatha (Bovcon et al, 2011(Bovcon et al, , 2013G ongora et al, 2009Ruibal Núñez, 2020), and fish species with partial retraction in their geographic distribution ranges coincide with commercial fishing targets (Galván et al, 2021). The trophic structure of demersal fish assemblages in the San Jorge Gulf (SJG), one productive area in the region, also changed because of industrial fishing (Funes, 2019;Funes et al, 2019). Fish diet breadth and trophic levels increased in the past decade because of fisheries discards in the intermediate predators' diet (Funes, 2019;Funes et al, 2019).…”

“…The trophic structure of demersal fish assemblages in the San Jorge Gulf (SJG), one productive area in the region, also changed because of industrial fishing (Funes, 2019;Funes et al, 2019). Fish diet breadth and trophic levels increased in the past decade because of fisheries discards in the intermediate predators' diet (Funes, 2019;Funes et al, 2019).…”

Diet Composition and Isotopic Analysis of Nine Important Fisheries Resources in the Eastern Adriatic Sea (Mediterranean)

“…However, their combined use can provide a robust characterization of species diet and of food web structure (Winemiller et al, 2007;Fanelli and Cartes, 2010;Young et al, 2018). Recently, analysis of stable nitrogen isotopes in the context of marine food webs has attracted considerable attention (Jennings et al, 2001;Bode et al, 2003;Funes et al, 2019). This has proved particularly useful as a mean of examining different theories regarding how ecosystems function.…”

Konstanz summer school 2018 on isotope ecology

“…Several papers in issues 2 and 4 (volume 55) of the journal Isotopes in Environmental and Health Studies seek to embrace the extent of the application of stable isotope analysis related to various environmental studies including routine and recent advances. An example is the investigation by Funes et al on trawling activities altering the trophic structure of fish communities affecting long-term modifications of trophic level change in the marine environment [1]. Paleo-diet and drinking water are in the focus of stable isotope analyses from teeth of white-tailed deers presented by Rivera-Araya et al [2] shining a light on historic living conditions.…”