Climate-driven population size fluctuations of jellyfish (Chrysaora plocamia) off Peru

Abstract

Niño Southern Oscillation (ENSO) events. By contrast, no peaks occurred during warming events in the cold La Vieja regime in the late 1990s and 2000s when jellyfish biomass was very low or below detection; however, at the end of the study period, biomass rose slightly. The fishing pattern in the NHUS is just the opposite of those that previously have been attributed to removing small pelagic fish. We suggest that environmental factors and prey availability act synergistically to generate observed population size variability of this medusa in the NHUS.

Forecasting the combined effects of anticipated climate change and agricultural conservation practices on fish recruitment dynamics in Lake Erie

“…Smoothness parameters were estimated with generalised cross validation. Because fewer years of data were available for white perch, as compared to walleye and yellow perch, we restricted the basis dimension, k (controls the degree of smoothness in the model), to 6 in all white perch models to avoid overfitting (Decker et al, 2013; Quiñones et al, 2015). To avoid the confounding effects of multicollinearity, prior to model construction, we used pairwise correlations to confirm that no substantial ( r > 0.6, Zuur, Ieno, Walker, Saveliev, & Smith, 2009) multicollinearity between predictor variables was present.…”

High occurrence of jellyfish predation by black‐browed and Campbell albatross identified by DNA metabarcoding

“…Climate change is predicted to cause major changes in the abundance and distribution of marine species (Constable et al, 2014). Jellyfish typically benefit from perturbations to the marine environment (Purcell, 2012), such as ocean warming (Purcell, 2005;Quiñones et al, 2015), overfishing (Daskalov, Grishin, Rodionov, & Mihneva, 2007), and the increasing number of coastal anthropogenic structures which promote the settlement of early larval stages (Duarte et al, 2013). Population increases are therefore predicted under current climate change scenarios, and global trends show a slight increase over the long-term, but show significant oscillations in blooms over shorter timescales (Condon et al, 2013 Jason Island during early chick-rearing 2015, the overall contribution in this study was much lower than previous stomach content studies.…”

Spatial ecology of blue shark and shortfin mako in southern Peru: local abundance, habitat preferences and implications for conservation

“…For example, interannual climate variation in the form of the El Niño Southern Oscillation (ENSO) has led to boom and bust fisheries in the Southeast Pacific because of poor knowledge of species' responses to ENSO and a lack of management (Wolff et al 2007). ENSO greatly alters oceanographic conditions every 2 to 7 yr, which affects the status of pelagic fisheries (Ñiquen & Bouchon 2004, Su et al 2011, Quiñones et al 2015. However, the relationship between ENSO and the local abundance of pelagic shark species remains poorly understood, hampering conservation efforts.…”