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The ocean in a box: water density gradients and discontinuities in water masses are important cues guiding fish larvae towards estuarine nursery grounds
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Advisor(s)
Abstract(s)
Discontinuities and gradients in water density are predominant features that may guide coastal fish larvae towards their
estuarine nursery grounds when within the influence of an
estuarine plume (Lindeman et al. 2000; Atema et al. 2002;
Kingsford et al. 2002; Hale et al. 2008; James et al. 2008).
When larvae are away from the estuarine plume zone, larvae
may follow patchy estuarine cues that may lead them towards
or away from the estuarine nursery—i.e., infotaxis strategy
(sensu Vergassola et al. 2007, see Teodósio et al. (2016) for
details on its applicability to fish larvae). So, recreating any of
such conditions with the existing experimental apparatuses is
far from resembling the natural conditions. Nonetheless, scientists have been relying on existing apparatuses to advance
our understanding of which environmental cues are prioritized
by fish larvae to find their nursery grounds (Radford et al.
2012; Morais et al. 2017; O'Connor et al. 2017; Vicente
et al. 2020), how they respond to the presence of conspecifics
(Døving et al. 2006; Vicente et al. 2020), prey, and predators
(Lecchini et al. 2005), and even how climate change may
disrupt sensory-driven social behaviors and habitat-choice responses (Munday et al. 2009; Pecl et al. 2017; Pistevos et al.
2017; Rossi et al. 2018).