Eschrichtius robustus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA707533 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Eschrichtius robustus Genome sequencing and assembly
| PRJNA384396 | ENA
Project description:Eschrichtius robustus Transcriptome and Gene expression
| PRJNA706346 | ENA
Project description:Eschrichtius robustus isolate:BS60 Genome sequencing and assembly
| PRJNA399463 | ENA
Project description:Eschrichtius robustus (grey whale) for VGP reference genome, mEscRob2, primary haplotype
| PRJNA921702 | ENA
Project description:Eschrichtius robustus (grey whale) for VGP reference genome, mEscRob2, alternate haplotype
| PRJNA921703 | ENA
Project description:Eschrichtius robustus isolate:AM-GW-M-EMB-4M-20130531 Genome sequencing and assembly
| PRJNA391859 | ENA
Project description:Understanding variability in growth patterns of marine mammals provides insights into the health of individuals and status of populations. Body growth of gray whales (Eschrichtius robustus) has been described for particular life stages, but has not been quantified across all ages. We derived a comprehensive growth equation for gray whales by fitting a two-phased growth model to age-specific length data of eastern North Pacific gray whales that were captured, stranded, or harvested between 1926 and 1997. To predict mass-at-age, we used the allometric relationship between mass and length. We found that on average (± SD), calves were 4.6 ± 0.043 m and 972 ± 26 kg at birth, and reached 8.5 ± 0.095 m and 6,019 ± 196 kg by the end of their first year of life (n = 118). Thus, calves almost double (2×) in length and octuple (8×) in mass while nursing, and are effectively about two-thirds of their asymptotic adult length and one-third of their maximum mass when weaned. The large sample of aged individuals (n = 730) indicates that gray whales live up to ~48 years and have a life expectancy of < 30 years. Adult females attain a mean (± SD) asymptotic size of 13.1 ± 0.048 m and 20,758 ± 222 kg, while the smaller males average 12.6 ± 0.048 m and 19,938 ± 222 kg at ~40 years of age. Females are thereby ~4% longer and heavier than males. These age-specific estimates of body size can be used to estimate food requirements and assess nutritional status of individuals.
| S-EPMC7333879 | biostudies-literature
Project description:Anaeromyces robustus strain:S4 Genome sequencing and assembly
| PRJNA330692 | ENA
Project description:BackgroundCommercial whaling caused extensive demographic declines in many great whale species, including gray whales that were extirpated from the Atlantic Ocean and dramatically reduced in the Pacific Ocean. The Eastern Pacific gray whale has recovered since the 1982 ban on commercial whaling, but the Western Pacific gray whale-once considered possibly extinct-consists of only about 200 individuals and is considered critically endangered by some international authorities. Herein, we use whole-genome sequencing to investigate the demographic history of gray whales from the Pacific and use environmental niche modelling to make predictions about future gene flow.ResultsOur sequencing efforts and habitat niche modelling indicate that: i) western gray whale effective population sizes have declined since the last glacial maximum; ii) contemporary gray whale genomes, both eastern and western, harbor less autosomal nucleotide diversity than most other marine mammals and megafauna; iii) the extent of inbreeding, as measured by autozygosity, is greater in the Western Pacific than in the Eastern Pacific populations; and iv) future climate change is expected to open new migratory routes for gray whales.ConclusionOur results indicate that gray whale genomes contain low nucleotide diversity and have been subject to both historical and recent inbreeding. Population sizes over the last million years likely peaked about 25,000 years before present and have declined since then. Our niche modelling suggests that novel migratory routes may develop within the next century and if so this could help retain overall genetic diversity, which is essential for adaption and successful recovery in light of global environmental change and past exploitation.
| S-EPMC5992727 | biostudies-literature