Patricia Arranz

Patricia Arranz
Universidad de La Laguna | ULL · Department of Animal Biology

About

21
Publications
5,488
Reads
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448
Citations
Additional affiliations
February 2007 - May 2012
Universidad de La Laguna
Position
  • PhD Student

Publications

Publications (21)
Article
Full-text available
Vessel noise is a primary driver of behavioural disturbance in cetaceans, which are targeted during whale-watch activities. Despite the growing, global effort for implementing best-practice principles, to date, there are no regulations on whale-watch vessel noise levels. Here, we test the hypothesis that a whale-watch vessel with a low noise emissi...
Article
Full-text available
Fear of predation can induce profound changes in the behaviour and physiology of prey species even if predator encounters are infrequent. For echolocating toothed whales, the use of sound to forage exposes them to detection by eavesdropping predators, but while some species exploit social defences or produce cryptic acoustic signals, deep-diving be...
Article
Full-text available
The largest animals are marine filter feeders, but the underlying mechanism of their large size remains unexplained. We measured feeding performance and prey quality to demonstrate how whale gigantism is driven by the interplay of prey abundance and harvesting mechanisms that increase prey capture rates and energy intake. The foraging efficiency of...
Conference Paper
Full-text available
Deep-diving whales must meet their energetic requirements by foraging efficiently in time-limited dives. Pilot whales are active hunters that sprint to catch few prey items while beaked whales target more low-caloric prey. Within depth-stratified pelagic habitats, the mesopelagic deep scattering layer constitutes the highest biomass concentration i...
Article
Full-text available
The desire of animal behaviorists for more flexible methods of conducting inter-study and inter-specific comparisons and meta-analysis of various animal behaviors compelled us to design an automated, animal behavior peak detection method that is potentially generalizable to a wide variety of data types, animals, and behaviors. We detected the times...
Article
Full-text available
Air-breathing marine predators must balance the conflicting demands of oxygen conservation during breath-hold and the cost of diving and locomotion to capture prey. However, it remains poorly understood how predators modulate foraging performance when feeding at different depths and in response to changes in prey distribution and type. Here, we use...
Article
Humans remember the past and use that information to plan future actions. Lab experiments that test memory for the location of food show that animals have a similar capability to act in anticipation of future needs, but less work has been done on animals foraging in the wild. We hypothesized that planning abilities are critical and common in breath...
Conference Paper
Full-text available
Los zifios presentan comportamientos de buceo y acústico que los distinguen de otros odontocetos, destacando su característico silencio cerca de superficie, a pesar de la cohesión de los grupos observados en emersión. Para comprobar si esta cohesión se traduce en coordinación en los perfiles de inmersión y sincronía de la actividad acústica durante...
Article
Full-text available
Early studies that categorized odontocete pulsed sounds had few means of discriminating signals used for biosonar-based foraging from those used for communication. This capability to identify the function of sounds is important for understanding and interpreting behavior; it is also essential for monitoring and mitigating potential disturbance from...
Article
SOCAL-BRS is an inter-disciplinary collaboration designed to increase understanding of marine mammal behavior and provide a robust scientific basis for estimating risk and minimizing effects of mid-frequency military sonar systems. Data were collected using visual observations, passive acoustic monitoring, animal-attached acoustic and movement tags...
Article
Full-text available
Here we use sound and movement recording tags to study how deep-diving Blainville's beaked whales (Mesoplodon densirostris) use echolocation to forage in their natural mesopelagic habitat. These whales ensonify thousands of organisms per dive but select only about 25 prey for capture. They negotiate their cluttered environment by radiating sound in...
Article
Communicating animals must balance fitness benefits against the costs of signaling, such as increased predation risk. Cetaceans communicate mainly with sound and near-surface vocalizations can place signalers at risk from shallow-diving top-predators with acute hearing such as killer whales. Beaked whales are deep divers living in small cohesive gr...
Article
Full-text available
Simultaneous high resolution sampling of predator behavior and habitat characteristics is often difficult to achieve despite its importance in understanding the foraging decisions and habitat use of predators. Here we tap into the biosonar system of Blainville's beaked whales, Mesoplodon densirostris, using sound and orientation recording tags to u...
Poster
Full-text available
This poster shows the results of the ZIFICAL I research cruise, realized in June, 2009 in waters of the islands Tenerife and Hierro (Canary Islands). In total 465 specimens of mesopelagic cephalopods were captured, belonging to 18 families, 23 genera and 36 species. The most abundant families, on order of abundance, were: Enoploteuthidae, Histioteu...
Technical Report
Memoria técnica del proyecto concedido por el Gobierno de Canarias con fondos de los Ministerios de Defensa y de Medio Ambiente. Proyecto ZIPHYSETER . Universidad de La Laguna, Tenerife

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Projects

Project (1)
Project
Optimize detection of ceatceans using new technologies to augment the sustainability of the marine tourism and shipping industries off Tenerife (Canary Islands), with application to the mitigation of human impacts on animal populations.