The effects of trophic interaction between the Patagonian native Percichthys trucha and the invasive Oncorhynchus mykiss during the juvenile period

Abstract

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Assembly of non‐native fishes in North Patagonian streams: Species occurrence and abundance respond to different spatial scales

“…Not surprisingly, most introduced species fail to become established and never reach invasive status (Arismendi et al, 2014; Moyle & Light, 1996). Our results suggest that in North Patagonia, biotic resistance from native fish species seems to have had little or no influence on the invasion process by introduced salmonid species, and that success of invaders in the face of low odds is related, as we previously suggested, mostly to the presence of favourable environments, such as adequate flow regimes (conditioned for the rainfall gradient), food availability (Lallement et al, 2020) added to the trophic superiority that the juveniles present in lotic systems (Otturi et al, 2020).…”

The rise of the Functional Response in invasion science: a systematic review

“…Ecological interactions such as cannibalism, intra-guild predation, competition, and higher-order predator presence (Paterson et al 2015;Bunke et al 2019;DeRoy et al 2020;Otturi et al 2020) were among the most highly investigated biotic contexts. These contexts are critical for upscaling interactions to the ecosystem level where, for example, the presence of conspecifics or other species can lead to facilitation or interference (Griffen 2006;, in turn directly influencing consumption rates.…”

“…Thus, there is an urgent need to include alternative resources, and inter-and intraspecific competition in FR experiments to obtain more accurate and realistic assessments (e.g. DeRoy et al 2020;Otturi et al 2020). Likewise, the source of the organisms used in the experiments needs attention.…”