Fig 3 - uploaded by Sian McGuinness
Content may be subject to copyright.
The observed and expected values for small (S), medium (M) and large (L) dolphin group size for Year 1, Year 2, Year 3, and Year 4. Black columns are observed values and white columns are expected values.

The observed and expected values for small (S), medium (M) and large (L) dolphin group size for Year 1, Year 2, Year 3, and Year 4. 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...

Context in source publication

Context 1
... dolphin groups were sighted ranging in size from 1 to 16 individuals with a mean and median of 3 and a mode of 2. Group size was significantly associated with year (χ2 = 19.5, df = 6, p < 0.05) but not season (χ2 = 5.99, df = 6, p > 0. 5). Year 1 had larger group sizes than expected, while Year 2, 3 and 4 showed smaller group sizes than expected (Fig. 3). The difference in the observed number of small group sizes peaked in Year 4. Sub-adults were present in 109 of the groups sighted. Multinomial logistic regression showed that sub-adult presence was significantly affected by season and group size but not year. Therefore, year was removed from the model. Final analysis found that ...

Similar publications

Article
Full-text available
Following the 2010 Deepwater Horizon disaster and subsequent unusual mortality event, adverse health impacts have been reported in bottlenose dolphins in Barataria Bay, LA including impaired stress response and reproductive, pulmonary, cardiac, and immune function. These conditions were primarily diagnosed through hands-on veterinary examinations a...
Article
Full-text available
Dolphin teeth contain enamel, dentin, and cementum. In dentin, growth layer groups (GLGs), deposited at incremental rates (e.g., annually), are used for aging. Major, minor, and trace elements are incorporated within teeth; their distribution within teeth varies, reflecting tooth function and temporal changes in an individual's exposure. This study...
Article
Full-text available
Delphinids are top ocean predators and accumulate high concentrations of mercury (Hg) through the food chain, particularly in organs such as liver and kidney, although the proportion of methylmercury (MeHg) is relatively low due to the demethylation process. Total mercury (T-Hg) levels in marine mammals have been shown to correlate with selenium (S...
Article
Full-text available
First identified as an anorexigenic peptide, in the last decades, several studies have suggested that Nesfatin-1 (Nesf-1) is a pleiotropic hormone implicated in numerous regulatory processes in peripheral organs and tissues. In vertebrates, Nesf-1 is indeed expressed in the central nervous system and peripheral organs. In this study, we characteriz...