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The observed and expected values for bottlenose dolphin presence per year and season. Black columns are observed values and white columns are expected values.

The observed and expected values for bottlenose dolphin presence per year and season. Black columns are observed values and white columns are expected values.

Source publication
Conference Paper
Full-text available
The Mediterranean subpopulation of common bottlenose dolphins (Tursiops truncatus) is classed as vulnerable with a decreasing population trend. Yet, research effort in the Mediterranean varies with relatively little being known of the Southern Adriatic Sea's bottlenose dolphins, which face increasing numbers of anthropogenic threats, mainly marine...

Contexts in source publication

Context 1
... Sightings were recorded during 185 surveys (32%). Chisquared analysis found that bottlenose dolphin presence was significantly associated with the year (χ2 = 13.6, df = 3, p < 0.05), but not season (χ2 = 0.944, df = 3, p > 0.05). Observed bottlenose dolphin presence was higher than expected in Year 1 and 2 but lower than expected in Year 3 and 4 (Fig. ...
Context 2
... is noteworthy that seismic surveys were conducted off the Montenegrin coast in December 2018 and February 2019 to explore natural gas potential [19]. As shown in Fig 2, bottlenose dolphin sightings were significantly lower in Year 3 (September 2018 to August 2019) and Year 4 (September 2019 to August 2020) after the events took place. However, causality has not been shown. ...

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