Sea otter (Enhydra lutris)
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA726636 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR14632200_1.fastq.gz | Fastqsanger.gz | |||
| SRR14632200_2.fastq.gz | Fastqsanger.gz | |||
| SRR14632300_1.fastq.gz | Fastqsanger.gz | |||
| SRR14632300_2.fastq.gz | Fastqsanger.gz | |||
| SRR14632400_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 1520 |
Similar Datasets
Project description:Cardiomyopathy is a heart muscle disease and diagnosis relies on radiography and echocardiography, while blood-based markers are lacking. Development of a non-invasive test would be useful when imaging is not possible (e.g., prenatal diagnosis). In southern sea otters (Enhydra lutris nereis), cardiomyopathy is a prevalent cause of mortality and antemortem diagnosis is challenging. Sea otters requiring clinical care are at significant anesthetic risk if cardiomyopathy is present. A blood-based assay would improve triage decisions, case management, and treatment protocols to safeguard against co-morbidities. With support from the Oiled Wildlife Care Network, we analyzed undepleted sea otter serum using mass spectrometry-based proteomics. Though the larger sample set included 63 sera (that included a validation set of 22 sera with class labels blinded to the data collector), we a priori compared only samples from wild otters. Additionally, we generated proteomic data for four heat tissues with paired sera. These results demonstrate the utility of proteomic analysis, offer a glimpse into the sea otter proteome, and serve as a reference data set for relative protein abundance in sera and cardiac tissue.
2021-12-22 | PXD030595 | Pride
Project description:Enhydra lutris kenyoni Genome sequencing and assembly
| PRJNA388419 | ENA
Project description:Ancient mitogenomes from Oregon sea otters (Enhydra lutris): genetic and archaeological contributions to the historical ecology of an extirpated population.
| PRJNA550086 | ENA
Project description:The northern sea otter inhabits coastal waters of the northern Pacific Ocean and is the largest member of the Mustelidae family. DNA sequencing methods that utilize microfluidic partitioned and non-partitioned library construction were used to establish the sea otter genome. The final assembly provided 2.426 Gbp of highly contiguous assembled genomic sequences with a scaffold N50 length of over 38 Mbp. We generated transcriptome data derived from a lymphoma to aid in the determination of functional elements. The assembled genome sequence and underlying sequence data are available at the National Center for Biotechnology Information (NCBI) under the BioProject accession number PRJNA388419.
| S-EPMC5748697 | biostudies-literature
Project description:Enhydra lutris nereis isolate:Gidget Genome sequencing and assembly
| PRJNA472597 | ENA
Project description:Parasitism, particularly in concert with other sublethal stressors, may play an important, yet underappreciated role in morbidity and mortality of threatened species. During necropsy of southern sea otters (Enhydra lutra nereis) from California submitted to the Marine Wildlife Veterinary Care and Research Center's Sea Otter Necropsy Program between 1999 and 2017, pathologists occasionally observed nasopulmonary mites infesting the respiratory tracts. Infestation was sometimes accompanied by lesions reflective of mite-associated host tissue damage and respiratory illness. Our objectives were to estimate prevalence of nasopulmonary mites, determine the taxonomic identity of the observed mites, and create a DNA reference for these organisms in southern sea otters as an aid in population management. Using unique morphological characteristics discerned via light and scanning electron microscopy (SEM), we identified the mites as Halarachne halichoeri, a species typically associated with harbor seals (Phoca vitiluna). The 18S, 16S, 28S and ITS1-2 genetic regions were sequenced and submitted to GenBank. We observed H. halichoeri mites in 25.6% (95% CI 19.9-33.4%). of southern sea otters from a subset of necropsies performed between 2012 and 2017. This is the first documentation of H. halichoeri in southern sea otters and is suggestive of parasite exchange between sea otters and harbor seals.
| S-EPMC6199184 | biostudies-literature
Project description:Southern sea otters have been actively managed for their conservation and recovery since listing on the federal Endangered Species Act in 1977. Still, they remain constrained to a geographically small area on the central coast of California relative to their former coast-wide range, with population numbers far below those of the estimated optimal sustainable population size. Species managers have discussed reintroducing southern sea otters into parts of their historic range to facilitate sustained population growth and geographic range expansion. San Francisco Bay (SFB), historically home to several thousand sea otters, is one location identified as a candidate release site for these reintroductions. The return of sea otters to SFB could bring benefits to local ecosystem restoration and tourism, in addition to spurring sea otter population growth to meet recovery goals. However, this is a highly urbanized estuary, so sea otters could also be exposed to serious anthropogenic threats that would challenge a successful reintroduction. In light of these potential detriments we performed a spatially-explicit risk assessment to analyze the suitability of SFB for southern sea otter reintroduction. We looked at threats to sea otters specific to SFB, including: the impacts of vessel traffic from commercial shipping, high-speed ferries, and recreational vessels; environmental contaminants of methylmercury and polychlorinated biphenyls; major oil spills; and commercial fishing. Factors that influenced the relative threat imposed by each stressor included the spatio-temporal extent and intensity of the stressor and its mitigation potential. Our analysis revealed the complex spatial and temporal variation in risk distribution across the SFB. The type and magnitude of anthropogenic risk was not uniformly distributed across the study area. For example, the central SFB housed the greatest cumulative risk, where a high degree of vessel traffic and other stressors occurred in conjunction. The individual stressors that contributed to this risk score varied across different parts of the study area as well. Whereas vessel traffic, particularly of fast ferries, was a high scoring risk factor in in the north and central bay, in the south bay it was environmental contaminants that caused greater risk potential. To help identify areas within the study area that managers might want to target for release efforts, the spatially-explicit risk map revealed pockets of SFB that could provide both suitable habitat and relatively low overall risk. However in some cases these were adjacent or in close proximity to identified high-risk portions of habitat in SFB. This predictive suitability and risk assessment can be used by managers to consider the spatial distribution of potential threats, and risk abatement that may be necessary for sea otters to re-occupy their historic home range in SFB.
| S-EPMC7678461 | biostudies-literature
Project description:The sea otter (Enhydra lutris) is a marine mammal hunted to near extinction during the 1800s. Despite their well-known modern importance as a keystone species, we know little about historical sea otter ecology. Here, we characterize the ecological niche of ancient southern sea otters (E. lutris nereis) using ?13C analysis and ?15N analysis of bones recovered from archaeological sites spanning ~7,000 to 350 years before present (N = 112 individuals) at five regions along the coast of California. These data are compared with previously published data on modern animals (N = 165) and potential modern prey items. In addition, we analyze the ?15N of individual amino acids for 23 individuals to test for differences in sea otter trophic ecology through time. After correcting for tissue-specific and temporal isotopic effects, we employ nonparametric statistics and Bayesian niche models to quantify differences among ancient and modern animals. We find ancient otters occupied a larger isotopic niche than nearly all modern localities; likely reflecting broader habitat and prey use in prefur trade populations. In addition, ancient sea otters at the most southerly sites occupied an isotopic niche that was more than twice as large as ancient otters from northerly regions. This likely reflects greater invertebrate prey diversity in southern California relative to northern California. Thus, we suggest the potential dietary niche of sea otters in southern California could be larger than in central and northern California. At two sites, Año Nuevo and Monterey Bay, ancient otters had significantly higher ?15N values than modern populations. Amino acid ?15N data indicated this resulted from shifting baseline isotope values, rather than a change in sea otter trophic ecology. Our results help in better understanding the contemporary ecological role of sea otters and exemplify the strength of combing zooarchaeological and biological information to provide baseline data for conservation efforts.
| S-EPMC7141068 | biostudies-literature