. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 246 G. A. NEVITT Odor signature (>fc;ui surface •— Plankton asscni Scamounl 1 1. A theoretical ollactors landscape in the atmosphere rellecis biological activity over a seamount. This is an area of upwelling ssheie pnmarv productivity tends i. \ seahnd he alerted li> a potentially productive foraging aiea as it encounters .1 chaiiLV in the olfactory landscape. Elements are not drawn to stale species are attracted to fishy odors (, cod liver oil. tuna oil, or lish homogciiatei. Such studies suggest that proccl-
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 246 G. A. NEVITT Odor signature (>fc;ui surface •— Plankton asscni Scamounl 1 1. A theoretical ollactors landscape in the atmosphere rellecis biological activity over a seamount. This is an area of upwelling ssheie pnmarv productivity tends i. \ seahnd he alerted li> a potentially productive foraging aiea as it encounters .1 chaiiLV in the olfactory landscape. Elements are not drawn to stale species are attracted to fishy odors (, cod liver oil. tuna oil, or lish homogciiatei. Such studies suggest that proccl- lariit'ornis ttsc their sense of smell to locate food patches (Grubb. 1972: Hutchison and Wen/el. 19X0; Lequette <•/ a/., 1989: Nevitt 1995). On a broader scale, we are only beginning to investigate how proeellariiforms use naturally occurring scented com- pounds as foraging and navigation cues (Figs. 1 and 2). I suggest that odors ser\e at least three distinct functions. First, for species that travel long distances to forage, con- tours in an odor landscape superimposed upon the ocean's surface may ser\e as oltactots gtiidcposts that mark the path the seahird follows isee also \Vald\ogel. 19X7). For exam- ple, a seahird might gain directional information by travel- ing along a shell break or another baths metric feature that is marked by a consistent olfactory signature in the atmo- sphere (Fig. 2A). Second, ollactors landscapes mas demar- cate large-scale areas where prey is likely to be found (Figs. 1 and 2B). Such areas include upwelling /ones or seamounts where primary productis its is likely to be high (Fig. I}. Finally, odor cues emitted from prey or directly associated with prey may assist seabnds using area-restricted search to locate prey patches (Fig. 2('i. This area-restricted search has been described elsewhere (Nevitt and Veil. 1999) and is likely to involve both visual cues provided by foraging COnspecifics and olfactory cues from prey. Although
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