MitoAge

Halichoerus grypus

Gray seal

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Maximum lifespan
42.9 yr
AnAge record
mtDNA size
16,797 bp
RefSeq NC_001602.1
GC content
41.73%
Whole genome
Non-coding
1,418 bp
D-loop 1,360 bp

Where Gray seal sits among 2,335 species

Whole-genome GC content against maximum lifespan. Gray seal has the 221st longest lifespan of them.

10203040501 yr10 yr100 yrMaximum lifespan, log scaleGC %Gray seal
  • This species
  • Other mammals
  • Other classes
Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,797 bp
GC skew (G − C) / (G + C)
−0.316
AT skew (A − T) / (A + T)
+0.132

Life history

Maximum lifespan
42.9 years
Adult weight
268 kg
Birth weight
14 kg
Female sexual maturity
4 years
Male sexual maturity
5.2 years
Gestation or incubation
240 days
Litter or clutch size
1
Litters per year
0.9

Lifespan from AnAge · AnAge record · other traits from AnAge Build 15 (HAGRID 02222)

About this record

Lifespan source
AnAge build 15
Based on
an animal in captivity
Data quality
acceptable, medium sample
Licence
Free to use, subject to the Human Ageing Genomic Resources conditions of use
Status
Updated in build 2
In the database since
build 1 (2015-07-01)
Last changed
build 2 (2026-11-13)

Every change against the 2015 build is in the changelog download.

Composition by region

Reference (L) strand as deposited in RefSeq
Whole genome16,797 bp
Protein-coding11,350 bp
12S rRNA960 bp
16S rRNA1,569 bp
All tRNA1,507 bp
D-loop1,360 bp

Genes and regions

Select a column to sort; select a gene to compare it across species
Composition
ND1NADH dehydrogenase subunit 1957 bp31.5%25.7%12.1%30.7%42.84%−0.434+0.101
ND2NADH dehydrogenase subunit 21,044 bp35.6%24.6%10.6%29.1%39.75%−0.465+0.183
COX1Cytochrome c oxidase subunit I1,545 bp27.4%28.9%18.0%25.7%43.69%−0.176−0.028
COX2Cytochrome c oxidase subunit II684 bp33.6%24.7%14.9%26.8%41.67%−0.284+0.153
ATP8ATP synthase F0 subunit 8204 bp38.2%24.5%8.3%28.9%37.26%−0.553+0.219
ATP6ATP synthase F0 subunit 6681 bp30.0%28.0%11.3%30.7%42.00%−0.462+0.033
COX3Cytochrome c oxidase subunit III784 bp27.8%27.8%15.1%29.3%44.39%−0.3220.000
ND3NADH dehydrogenase subunit 3346 bp31.2%25.1%12.4%31.2%43.64%−0.430+0.108
ND4LNADH dehydrogenase subunit 4L297 bp28.6%30.0%13.8%27.6%41.41%−0.333−0.023
ND4NADH dehydrogenase subunit 41,378 bp31.9%25.8%12.3%30.1%42.38%−0.421+0.106
ND5NADH dehydrogenase subunit 51,830 bp32.4%25.8%11.7%30.1%41.75%−0.440+0.113
ND6NADH dehydrogenase subunit 6528 bp43.0%18.2%9.8%29.0%38.83%−0.493+0.406
CYTBCytochrome b1,140 bp30.9%24.8%13.6%30.7%44.30%−0.386+0.109
12S rRNA12S ribosomal RNA960 bp37.0%21.4%17.5%24.2%41.67%−0.160+0.268
16S rRNA16S ribosomal RNA1,569 bp38.3%23.1%17.5%21.1%38.56%−0.094+0.247
D-loopControl region (D-loop)1,360 bp31.5%23.5%16.3%28.7%45.00%−0.275+0.144

Codon usage

Counts per codon, darker is more frequent

3,805 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F6.1%
UUU70
UUC161
Leu L15.7%
UUA71
UUG18
CUU57
CUC94
CUA296
CUG60
Ile I8.9%
AUU141
AUC199
Met M6.4%
AUA182
AUG63
Val V4.9%
GUU19
GUC47
GUA94
GUG27
Ser S7.4%
UCU35
UCC71
UCA112
UCG7
AGU19
AGC38
Pro P5.2%
CCU44
CCC82
CCA62
CCG10
Thr T8.2%
ACU49
ACC109
ACA136
ACG18
Ala A6.8%
GCU46
GCC98
GCA108
GCG5
Tyr Y3.5%
UAU44
UAC88
His H2.7%
CAU35
CAC69
Gln Q2.2%
CAA68
CAG17
Asn N3.9%
AAU46
AAC102
Lys K2.7%
AAA87
AAG14
Asp D1.9%
GAU26
GAC46
Glu E2.6%
GAA78
GAG21
Cys C0.6%
UGU7
UGC17
Trp W2.7%
UGA94
UGG10
Arg R1.7%
CGU2
CGC15
CGA42
CGG4
Gly G5.7%
GGU37
GGC48
GGA106
GGG24
Stop 0.3%
UAA8
UAG1
AGA1
AGG0

Genome map

38 annotated features in NC_001602.1

Hover, tap or tab to a feature to see its position, length, strand and GC content. Genes and rRNAs open their own pages.

  • Protein-coding13
  • rRNA2
  • tRNA22
  • D-loop1
  • Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
  • Middle ring: GC% of each gene against the whole genome (41.7%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 38 features as a table
FeatureTypeStartEndLengthStrandGC
tRNA-PheTransfer RNA90697570 bp+–
12S rRNARibosomal RNA9761,935960 bp+41.7%
tRNA-ValTransfer RNA1,9362,00873 bp+–
16S rRNARibosomal RNA2,0093,5771,569 bp+38.6%
tRNA-Leu (UUR)Transfer RNA3,5783,65174 bp+–
ND1Protein-coding gene3,6544,610957 bp+42.8%
tRNA-IleTransfer RNA4,6104,67869 bp+–
tRNA-GlnTransfer RNA4,6764,74873 bp−–
tRNA-MetTransfer RNA4,7494,81870 bp+–
ND2Protein-coding gene4,8195,8621,044 bp+39.8%
tRNA-TrpTransfer RNA5,8615,92868 bp+–
tRNA-AlaTransfer RNA5,9396,00769 bp−–
tRNA-AsnTransfer RNA6,0096,08173 bp−–
tRNA-CysTransfer RNA6,1146,17966 bp−–
tRNA-TyrTransfer RNA6,1806,24768 bp−–
COX1Protein-coding gene6,2497,7931,545 bp+43.7%
tRNA-Ser (UCN)Transfer RNA7,7917,86171 bp−–
tRNA-AspTransfer RNA7,8667,93267 bp+–
COX2Protein-coding gene7,9338,616684 bp+41.7%
tRNA-LysTransfer RNA8,6188,68669 bp+–
ATP8Protein-coding gene8,6888,891204 bp+37.3%
ATP6Protein-coding gene8,8499,529681 bp+42.0%
COX3Protein-coding gene9,52910,312784 bp+44.4%
tRNA-GlyTransfer RNA10,31210,37968 bp+–
ND3Protein-coding gene10,38010,725346 bp+43.6%
tRNA-ArgTransfer RNA10,72710,79569 bp+–
ND4LProtein-coding gene10,79611,092297 bp+41.4%
ND4Protein-coding gene11,08612,4631,378 bp+42.4%
tRNA-HisTransfer RNA12,46412,53269 bp+–
tRNA-Ser (AGY)Transfer RNA12,53312,59159 bp+–
tRNA-Leu (CUN)Transfer RNA12,59212,65261 bp+–
ND5Protein-coding gene12,65314,4821,830 bp+41.8%
ND6Protein-coding gene14,46614,993528 bp−38.8%
tRNA-GluTransfer RNA14,99415,06269 bp−–
CYTBProtein-coding gene15,06716,2061,140 bp+44.3%
tRNA-ThrTransfer RNA16,20716,27569 bp+–
tRNA-ProTransfer RNA16,27716,34266 bp−–
D-loopControl region16,3439051,360 bp–45.0%

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