Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
184
datasets available to search
ShareScore release 0.9.0
Dataset results
184 results for “Marine mammals”
FIGURE 1 in A checklist of the helminth parasites of marine mammals from Argentina
FIGURE 1. Map of Argentina (shadowed area) showing the provinces and geographical area where species of marine mammals have been collected. The filled circles indicate the collection sites (black circles) in the present study: (1) San Sebastian Bay; and (2) Elizalde Island, Staten Island (see Parasite- Host List).
Climate change impacts on seabirds and marine mammals: the importance of study duration, thermal tolerance and generation time
Understanding climate change impacts on top predators is fundamental to marine biodiversity conservation, due to their increasingly threatened populations and their importance in marine ecosystems. We conducted a systematic review of the effects of climate change (prolonged, directional change) and climate variability on seabirds and marine mammals. We extracted data from 484 studies (4808 published studies were reviewed), comprising 2215 observations on demography, phenology, distribution, diet, behaviour, body condition and physiology. The likelihood of concluding that climate change had an impact increased with study duration. However, the temporal thresholds for the effects of climate change to be discernible varied from 10 to 29 years depending on the species, the biological response and the oceanic study region. Species with narrow thermal ranges and relatively long generation times were more often reported to be affected by climate change. This provides an important framework for future assessments, with guidance on response- and region-specific temporal dimensions that need to be considered when reporting effects of climate change. Lastly, we found that tropical regions and non-breeding life stages were poorly covered in the literature, a concern that should be addressed to enable a better understanding of the vulnerability of marine predators to climate change.
Western Antarctic marine mammal and seabird distance sampling data
<p>These datasets are:</p> <p>1) Raw (MS Access) IFAW Logger2010 tables (<a href="http://www.marineconservationresearch.co.uk/downloads/logger-2000-rainbowclick-software-downloads/">http://www.marineconservationresearch.co.uk/downloads/logger-2000-rainbowclick-software-downloads/</a>) and</p> <p>2) .RData objects preprocessed by the R package LoggeR (<a href="https://github.com/embiuw/LoggeR">https://github.com/embiuw/LoggeR</a>), for distance sampling of marine mammals and seabirds from two ships of opportunity along the Western Antarctic Peninsula, Drake Passage and Scotia Sea during the 2019 - 2020 austral summer. The ships were the MS Fram and MS Midnatsol of the Hurtigruten fleet, with data collected from the start of December 2019 until late January 2020. </p>
Data from: Population structure and historical demography of South American sea lions provide insights into the catastrophic decline of a marine mammal population
Understanding the causes of population decline is crucial for conservation management. We therefore used genetic analysis both to provide baseline data on population structure and to evaluate hypotheses for the catastrophic decline of the South American sea lion (Otaria flavescens) at the Falkland Islands (Malvinas) in the South Atlantic. We genotyped 259 animals from 23 colonies across the Falklands at 281 bp of the mitochondrial hypervariable region and 22 microsatellites. A weak signature of population structure was detected, genetic diversity was moderately high in comparison with other pinniped species, and no evidence was found for the decline being associated with a strong demographic bottleneck. By combining our mitochondrial data with published sequences from Argentina, Brazil, Chile and Peru, we also uncovered strong maternally directed population structure across the geographical range of the species. In particular, very few shared haplotypes were found between the Falklands and South America, and this was reflected in correspondingly low migration rate estimates. These findings do not support the prominent hypothesis that the decline was caused by migration to Argentina, where large-scale commercial harvesting operations claimed over half a million animals. Thus, our study not only provides baseline data for conservation management but also reveals the potential for genetic studies to shed light upon long-standing questions pertaining to the history and fate of natural populations.
Data from: Large‐scale molecular diet analysis in a generalist marine mammal reveals male preference for prey of conservation concern
Sex‐specific diet information is important in the determination of predator impacts on prey populations. Unfortunately, the diet of males and females can be difficult to describe, particularly when they are marine predators. We combined two molecular techniques to describe haul‐out use and prey preferences of male and female harbor seals (Phoca vitulina) from Comox and Cowichan Bay (Canada) during 2012–2013. DNA metabarcoding quantified the diet proportions comprised of prey species in harbor seal scat, and qPCR determined the sex of the individual that deposited each scat. Using 287 female and 260 male samples, we compared the monthly sex ratio with GLMs and analyzed prey consumption relative to sex, season, site, and year with PERMANOVA. The sex ratio between monthly samples differed widely in both years (range = 12%–79% males) and showed different patterns at each haul‐out site. Male and female diet differed across both years and sites: Females consumed a high proportion of demersal fish species while males consumed more salmonid species. Diet composition was related to both sex and season (PERMANOVA: R2 = 27%, p < 0.001; R2 = 24%, p < 0.001, respectively) and their interaction (PERMANOVA: R2 = 11%, p < 0.001). Diet differences between males and females were consistent across site and year, suggesting fundamental foraging differences, including that males may have a larger impact on salmonids than females. Our novel combination of techniques allowed for both prey taxonomic and spatiotemporal resolution unprecedented in marine predators.
Data from: Acoustic risk balancing by marine mammals: anthropogenic noise can influence the foraging decisions by seals
<p class="MsoCommentText">Avoidance of anthropogenic sounds has been measured in many species. The results, which are typically based on observations in limited exposure contexts, are frequently used to inform policy and the regulation of industrial activities. However, the occurrence and magnitude of avoidance may be a consequence of complex risk-balancing decisions made by animals. The importance of the factors in decision-making, such as perceived risks associated with the sounds or prey quantity and quality during sound exposure, is unknown.</p> <p class="MsoCommentText">Here we address this knowledge gap by measuring the relative influence of perceived risk of a sound (silence, <span>pile driving, and a tidal turbine)</span> and prey patch quality on decision making and foraging success in grey seals <span>(<i>Halichoerus grypus</i>). </span>Seals were given access to two <span>underwater 'prey patches' </span>in an experimental pool <span>where fish were delivered at controlled rates to simulate a </span>low density (LD) and a high density (HD) prey patch. Acoustic playbacks were made using an underwater speaker above one of the prey patches (randomised during the study), and three decision and foraging metrics (foraging duration, foraging effort allocation between the prey patches, and foraging success) were measured.</p> <p>Foraging success was highest during silent controls and was similar regardless of speaker location (LD/HD). Under the tidal turbine and pile driving treatments, foraging success was similar to the controls when the speaker was located at the HD prey patch but was significantly reduced (~16-28% lower) when the speaker was located at the LD prey patch. Foraging decisions by the seals were consistent with a risk/profit balancing approach. Avoidance rates depend on the quality of the prey patch as well as the perceived risk.</p> <p>Policy implications: The results suggest that foraging context is important when interpreting avoidance behaviour and should be considered when predicting the effects of anthropogenic activities. For example, sound exposure in different prey patch qualities may result in markedly different avoidance behaviour, potentially leading to contrasting predictions of impact in Environmental Assessments. We recommend future studies explicitly consider foraging context, and other contextual factors such as behavioural state (e.g. foraging or travelling) and habitat quality.</p>
Marine mammal acoustic presence - South Orkney Island 2016 & 2017
<p>Data used in study looking at the marine mammal species diversity and habitat use at South Orkney Island through passive acoustic monitoring. </p> <p>File description </p> <ul> <li>2016_dailyAP_rawData.csv: countdata of the number of hours per day containing at least one species-specific vocalization during the recording period in 2016</li> <li>2017_dailyAP_rawData.csv: countdata of the number of hours per day containing at least one species-specific vocalization during the recording period in 2017</li> <li>data16_20.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 20 Hz and source level of 189 db, in 2016</li> <li>data17_20.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 20 Hz and source level of 189 db, in 2017</li> <li>data16_100.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 100 Hz and source level of 163 db, in 2016</li> <li>data17_100.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 100 Hz and source level of 163 db, in 2017</li> <li>data16_200.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 200 Hz and source level of 163 db, in 2016</li> <li>data17_200.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 200 Hz and source level of 163 db, in 2017</li> <li>GAMM_modelling.R : R code</li> </ul>
Acoustic presence of marine mammals at the South Orkney Islands, Scotia Sea
<p>Data used in study looking at the marine mammal species diversity and habitat use at South Orkney Island through passive acoustic monitoring. </p> <p>File description </p> <ul> <li>2016_dailyAP_rawData.csv: countdata of the number of hours per day containing at least one species-specific vocalization during the recording period in 2016</li> <li>2017_dailyAP_rawData.csv: countdata of the number of hours per day containing at least one species-specific vocalization during the recording period in 2017</li> <li>data16_20.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 20 Hz and source level of 189 db, in 2016</li> <li>data17_20.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 20 Hz and source level of 189 db, in 2017</li> <li>data16_100.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 100 Hz and source level of 163 db, in 2016</li> <li>data17_100.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 100 Hz and source level of 163 db, in 2017</li> <li>data16_200.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 200 Hz and source level of 163 db, in 2016</li> <li>data17_200.csv: proportion of daily acoustic marine mammal presence (0-1) and environmental variables within the audible area based on a sound frequency of 200 Hz and source level of 163 db, in 2017</li> <li>GAMM_revision.R : R code</li> </ul>
Data from: Bayesian inference of a historical bottleneck in a heavily exploited marine mammal
Open the record for dataset details and reuse information.
Data from: Contrasting patterns of genetic diversity at three different genetic markers in a marine mammal metapopulation
Open the record for dataset details and reuse information.
Data from: A unique feeding strategy of the extinct marine mammal Kolponomos: convergence on sabretooths and sea otters
Open the record for dataset details and reuse information.
Data from: Hierarchical Bayesian model reveals the distributional shifts of Arctic marine mammals
Open the record for dataset details and reuse information.
Data from: The influence of sea ice, wind speed and marine mammals on Southern Ocean ambient sound
Open the record for dataset details and reuse information.
Data from: Variations in age- and sex-specific survival rates help explain population trend in a discrete marine mammal population
Open the record for dataset details and reuse information.
Data from: Birth dates vary with fixed and dynamic maternal features, offspring sex, and extreme climatic events in a high-latitude marine mammal
Open the record for dataset details and reuse information.
Data from: Evolution of the MHC-DQB exon 2 in marine and terrestrial mammals
Open the record for dataset details and reuse information.
Data from: Population structure and historical demography of South American sea lions provide insights into the catastrophic decline of a marine mammal population
Open the record for dataset details and reuse information.
Discrete-space continuous-time models of marine mammal exposure to Navy sonar
Open the record for dataset details and reuse information.
Data from: Large‐scale molecular diet analysis in a generalist marine mammal reveals male preference for prey of conservation concern
Open the record for dataset details and reuse information.
Data from: Fine-scale genetic population structure in a mobile marine mammal: inshore bottlenose dolphins in Moreton Bay, Australia
Open the record for dataset details and reuse information.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.