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Full-Text Articles in Other Ecology and Evolutionary Biology

Plastron Pigmentation Variation In A Coastal Turtle Species Of Conservation Concern (Malaclemys Terrapin), Beth Reinke, Steven Pearson, Will Selman Dec 2017

Plastron Pigmentation Variation In A Coastal Turtle Species Of Conservation Concern (Malaclemys Terrapin), Beth Reinke, Steven Pearson, Will Selman

Beth Reinke

Malaclemys terrapin inhabits salt marshes of the coastal United States and has been historically divided into seven subspecies. Two of the described subspecies, M. t. pileata and M. t. littoralis, occur along the western and eastern coastlines of Louisiana, respectively. To better understand potential boundaries of these two subspecies, we documented pigmentation variation of the plastron along the coast of Louisiana where the subspecies supposedly intergrade. Photographs of the plastron were taken of captured individuals and we quantified pigment with a photoprocessing software (ImageJ). We found pigmentation differences between sexes, with females having lighter plastrons than males. The plastron pigmentation …


The Qualitative Assessment Of Responsiveness To Environmental Challenge In Horses And Ponies, Fabio Napolitano, Giuseppe De Rosa, Ada Braghieri, Fernando Grasso, Aldo Bordi, Françoise Wemelsfelder Jun 2016

The Qualitative Assessment Of Responsiveness To Environmental Challenge In Horses And Ponies, Fabio Napolitano, Giuseppe De Rosa, Ada Braghieri, Fernando Grasso, Aldo Bordi, Françoise Wemelsfelder

Françoise Wemelsfelder, PhD

The responsiveness of 10 horses and 10 ponies to environmental challenge (represented by an open field test) was assessed using a qualitative approach based on free choice profiling methodology (FCP), which gives observers complete freedom to choose their own descriptive terms. Data were analysed with generalised Procrustes analysis (GPA), a multivariate statistical technique associated with FCP. A cross-validation of the outcomes of this approach to data recorded through quantitative behaviour analysis, and through a questionnaire given to the animals’ owner/riding instructor, was also performed using principal component analysis (PCA). Twelve undergraduate students generated their own descriptive vocabularies, by watching 20 …


Animal Personality As A Cause And Consequence Of Contest Behaviour, Mark Briffa, Lynne U. Sneddon, Alistair J. Wilson May 2015

Animal Personality As A Cause And Consequence Of Contest Behaviour, Mark Briffa, Lynne U. Sneddon, Alistair J. Wilson

Lynne Sneddon, PhD

We review the evidence for a link between consistent among-individual variation in behaviour (animal personality) and the ability to win contests over limited resources. Explorative and bold behaviours often covary with contest behaviour and outcome, although there is evidence that the structure of these ‘behavioural syndromes’ can change across situations. Aggression itself is typically repeatable, but also subject to high within-individual variation as a consequence of plastic responses to previous fight outcomes and opponent traits. Common proximate mechanisms (gene expression, endocrine control and metabolic rates) may underpin variation in both contest behaviour and general personality traits. Given the theoretical links …


Great Ape Mindreading: What’S At Stake?, Kristin Andrews Apr 2015

Great Ape Mindreading: What’S At Stake?, Kristin Andrews

Kristin Andrews, PhD

Humans and other great apes are similar in so many ways. We share an extended immaturity and intense infant-caregiver relationships, group living situations, cultural transmission of technology, and many emotions and cognitive capacities. Yet the communities of nonhuman apes are also very different from human communities. Humans build lasting tools, and store them to use later. We build permanent sleeping and living structures. We cook our food. We have courts of law and prisons and ethics books. There are vast technological differences between humans and nonhuman great apes. What is it that accounts for such a difference? On one account, …


A Habitat Selection Game Of Interactions Between Rodents And Their Predators, Amos Bouskila Dec 2000

A Habitat Selection Game Of Interactions Between Rodents And Their Predators, Amos Bouskila

Amos Bouskila

No abstract provided.