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http://saruna.mnu.edu.mv/jspui/handle/123456789/3669
Title: | Does bathymetry drive whale shark aggregations? |
Authors: | Copping, Joshua |
Issue Date: | 1-Dec-2016 |
Publisher: | MSc Marine Environmental Management |
Citation: | Copping, J. (2016). Does bathymetry drive whale shark aggregations?(Master thesis). MSc Marine Environmental Management. |
Abstract: | Whale sharks, Rhincodon typus, form seasonal feeding aggregations in coastal
waters around the world. Most research has studied individual aggregations and
prey availability, without investigating factors known to influence other megafauna
aggregations. A number of studies have shown the basking shark and megamouth
shark, are more abundant in areas with bathymetric features known to cause higher
primary productivity. Therefore, this study examines the bathymetry in areas R. typus
aggregation events occur, with the aim to understand whether bathymetry influences
aggregations. The research carried out shows there are similarities in bathymetry
between aggregation sites, significantly different from other coastal areas within R.
typus’ global range. Evidence shows aggregations occur in areas with specific
bathymetric features; shallow coastal areas in close proximity to water in the
mesopelagic zone, connected by steep gradient slopes such as reef slopes or
continental shelf breaks. These factors are known to induce upwelling events,
increasing primary productivity, consequently attracting a number of filter feeding
species. This study has shown bathymetry does influence Rhincodon typus
aggregations and has filled in knowledge gaps missing from previous research. |
URI: | http://saruna.mnu.edu.mv/jspui/handle/123456789/3669 |
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