Abstract During recent decades satellite telemetry using the Argos system has been used extensively to track many species of marine mammals. However, aquatic behavior most these results in a high number locations with low or unknown accuracy. data are often filtered reduce noise produced by locations, typically removing points requiring unrealistic swimming speeds. Unfortunately, this method excludes considerable good‐quality that have traveling speeds result two being taken very close time....

Habitat selection is a complex process, which involves behavioural decisions guided by the multiple needs and constraints faced individuals. Climate-induced changes in environmental conditions may alter those trade-offs resulting habitat use patterns. In this study, we investigated effect of sea temperature on acoustically tagged Atlantic cod (Gadus morhua) at Norwegian Skagerrak coast. Significant relationships between ocean were found. Under favourable thresholds (<16 °C), selected...

Abstract Genetic divergence among populations arises through natural selection or drift and is counteracted by connectivity gene flow. In sympatric populations, isolating mechanisms are thus needed to limit the homogenizing effects of flow allow for adaptation speciation. Chromosomal inversions act as an important mechanism maintaining barriers, yet their role in with not entirely understood. Here, we revisit question whether play a connected marine fish Atlantic cod ( Gadus morhua ),...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 447:289-304 (2012) - DOI: https://doi.org/10.3354/meps09516 Importance of fast ice and glacier fronts for female polar bears their cubs during spring in Svalbard, Norway Carla Freitas1,2,*, Kit M. Kovacs1, Magnus Andersen1, Jon Aars1, Stein Sandven3, Mette Skern-Mauritzen1,4, Olga Pavlova1, Christian...

Although growing evidence supports the idea that animal personality can explain plasticity in response to changes social environment, it remains be tested whether spatial responses of individuals face natural environmental fluctuations. This is a major challenge ecology and evolution as dynamics link individual- population-level processes. In this study, we investigated potential individual personalities predict differences fish behaviour wild. Specifically, our goal was answer if space use...

Abstract Acoustic telemetry has become a popular means of obtaining individual behavioural data from wide array species in marine and freshwater systems. Fate information is crucial to understand important aspects population dynamics such as mortality, predation or dispersal rates. Here we present method infer fate acoustic arrays receivers with overlapping detection ranges. Our depends exclusively on animal movements the characteristics configuration equipment. By answering limited number...

Understanding the responses of aquatic animals to temperature variability is essential predict impacts future climate change and inform conservation management. Most ectotherms such as fish are expected adjust their behaviour avoid extreme temperatures minimize acute changes in body temperature. In coastal Skagerrak, Norway, sea surface (SST) ranges seasonally from 0 over 20°C, representing a challenge community which includes cold-, cool- warm-water affinity species. By acoustically...

Understanding responses of marine species to temperature variability is essential predict impacts future climate change in the oceans. Most ectotherms are expected adjust their behavior avoid extreme temperatures and minimize acute changes body temperature. However, measuring such behavioral plasticity wild challenging. Combining 4 years telemetry-derived data on juvenile adult (30-80 cm) Atlantic cod (Gadus morhua), situ ocean measurements, we found a significant effect sea depth use...

Brown trout Salmo trutta (L.) is a facultative anadromous species, where portion of individuals in populations with access to the sea perform migrations use richer feeding resources. We investigated effect salmon lice Lepeophtheirus salmonis (Krøyer 1837) infestation on survival and behaviour wild post-smolts (average fork length = 180 mm) during their marine migration. Comparisons migratory were made between an artificially infested group (n 74) control 71) area low natural pressure....

1 The study of habitat selection and use are crucial for understanding the biological requirements animals strategies they to fulfil their needs. A variety statistical techniques available quantify selection, most them based on comparison attributes in sites used by unused, but available, sites. Because difficulties defining what is from an animal's perspective many species, approaches such as first-passage time (FPT) analysis have been developed, which explore habitat-use intensities...

Understanding the effects of ecological disturbances in coastal habitats is crucial and timely as these are anticipated to increase intensity frequency future due increasing human pressure. In this study we used directed kelp trawling a scientific tool quantify impacts broad-scale disturbance on community structure function. We tested ecosystem-wide BACI design using two 15 km 2 areas. The had substantial impact forests study, removing 2986 tons causing 26% loss total canopy at trawled...

The effectiveness of Marine Protected Areas (MPAs) depends on the mobility populations that are target protection, with sedentary species likely to spend more time under protection even within small MPAs. However, little is understood about how individual variation in may influence risk crossing an MPA border, as well fitness costs associated being exposed spillover fisheries. Here we investigated repeatability spatial behaviour, its role determining probability at (i.e. fishery) and...

Melanoma is the most aggressive and lethal form of skin cancer, with its global incidence increasing significantly over past five decades. Key risk factors include genetic predisposition environmental exposure, ultraviolet (UV) radiation being significant modifiable factor. Therapeutic strategies vary according to disease stage, ranging from surgical excision—considered gold standard for early lesions—to more complex approaches such as immunotherapy, targeted therapy, chemotherapy, combined...

Mature male sperm whales (Physeter macrocephalus) primarily inhabit high latitude regions, travelling to tropical/temperate waters for breeding, where females and juveniles reside in cohesive social groups. Though mating is known occur at low latitudes, the timing, duration, routes of adult migrations between feeding breeding areas are poorly known. To study movement patterns whales, 29 individuals were equipped with satellite transmitters Northeast Atlantic Arctic (69-79°N). Twelve these...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 375:247-261 (2009) - DOI: https://doi.org/10.3354/meps07725 Deep into ice: over-wintering and habitat selection in male Atlantic walruses Carla Freitas1,2,*, Kit M. Kovacs1, Rolf A. Ims2, Michael Fedak3, Christian Lydersen1 1Norwegian Polar Institute, Environmental Centre, 9296 Tromsø, Norway 2Institute of...

This article reviews a suite of studies conducted in network coastal Marine Protected Areas (MPAs) Skagerrak, Southeast Norway. In 2006, Norway’s first lobster reserves were implemented, with the aim protecting European ( Homarus gammarus ) through ban on fixed gear. A before–after control-impact paired series (BACIPS) monitoring program was initiated to evaluate effects protection depleted populations. Experimental trapping and capture-recapture techniques combined track demography...

The Spitsbergen bowhead whale stock is critically endangered. It believed to number in the tens. Here we report results from first satellite transmitter ever deployed on an individual this stock. A female was tagged 3 April 2010 (at 79˚54' N, 01˚03' E), but no locations were transmitted by tag until 30 2010, after which data received continuously for 86 days. Additionally, three small clusters of later year; latest 20 December (262 days deployment). During continuous tracking, initially...

Abstract The survival of animals is impacted by landscapes spatially varying mortality factors including habitat type, predation risk or harvest risk, among others. Characterization these spatial processes important for managing animal populations and their habitats, yet this information has proved challenging to capture. Advances in telemetry now make it possible monitor tagged individuals' locations through time a wide range taxa, providing opportunity assess movement simultaneously...

Abstract Foraging is a behavioural process and, therefore, individual behaviour and diet are theorized to covary. However, few comparisons of type exist in the wild. We tested whether covary protected population Atlantic cod, Gadus morhua. Working no‐take marine reserve, we could collect data on natural variation choice with minimal anthropogenic disturbance. inferred using acoustic telemetry from stable isotope compositions (expressed as δ 13 C 15 N values). further investigated have...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 595:203-215 (2018) - DOI: https://doi.org/10.3354/meps12581 Foraging behavior of juvenile loggerhead sea turtles in open ocean: from Lévy exploration area-restricted search Carla Freitas1,2,*, Rui Caldeira1, Jesus Reis1, Thomas Dellinger3,4 1Oceanic Observatory Madeira, Agência Regional para o Desenvolvimento...

Studies addressing the impact of salmon lice (Lepeophtheirus salmonis Krøyer) on sea trout in their natural habitat are scarce and mostly limited to prophylaxis-based experiments. The main drawbacks with this approach that infestations control fish not known anti-parasitic treatment is unknown efficacy may have unwanted side-effects. We tested an innovative where prophylaxis replaced artificial infestation fish. Twenty-nine post-smolts were caught a farming-free area southern Norway half...