Grey Seal

Halichoerus grypus (Fabricius 1791)

Tanya Dewey, Animal Diversity Web cc-by-nc-sa-3.0

Halichoerus grypus (Grey Seal) is a species of mammals in the family earless seals. They are native to Atlantic Ocean, the Palearctic, and The Nearctic. They are solitary carnivores. Individuals are known to live for 560.0700000000001 months and can grow to 2079.47 mm. Reproduction is viviparous. They rely on lift powered swimming and swimming to move around.

URI: http://www.marineregions.org/mrgid/1902

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URI: https://www.wikidata.org/entity/Q106447
Definition: largest of the eight ecozones constituting the Earth's surface
Attribution: https://commons.wikimedia.org/wiki/File:Palearctic.png

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URI: https://www.wikidata.org/entity/Q737742
Definition: one of the eight terrestrial ecozones constituting the Earth's land surface
Attribution: https://commons.wikimedia.org/wiki/File:Ecozone_Nearctic.svg

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URI: http://www.wikidata.org/entity/Q81875
Definition: organism that eats mostly or exclusively animal tissue

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URI: http://eol.org/schema/terms/solitary
Definition: Solitary animals are those that spend a majority of their lives without others of their species, with possible exceptions for mating and raising their young. Antonyms for a solitary animal include a social animal or a colonial animal.
Attribution: https://www.definitions.net/definition/solitary+animal

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URI: http://www.marinespecies.org/traits/Viviparous
Definition: 1) Producing live offspring from within the body of the parent (Lincoln et al., 1998). 2) Development of an embryo within the body of the parent, in part, resources passing directly from parent to embryo (Barnes et al., 2006).
Attribution: Lincoln, R., Boxshall, G. & Clark, P., 1998. A dictionary of ecology, evolution and systematics (2nd ed.). Cambridge: Cambridge University of Press. Barnes R.S.K., Calow P., Olive P.J.W., Golding, D.W, and Spicer, J.I. 2006. The invertebrates: a new synthesis, Oxford: Blackwell Science Ltd. http://www.marinespecies.org/traits/wiki/Traits:Viviparous

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URI: https://eol.org/schema/terms/lift_based_swimming
Definition: Hydrofoils, or fins, are used to push against the water to create a normal force to provide thrust, propelling the animal through water. The reduction of fin cross-sectional area helps to minimize drag, and therefore increase efficiency. Regardless of size of the animal, at any particular speed, maximum possible lift is proportional to (wing area) x (speed)<sup>2</sup>. Dolphins and whales have large, horizontal caudal hydrofoils, while many fish and sharks have vertical caudal hydrofoils.

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URI: http://purl.obolibrary.org/obo/GO_0036268
Definition: Self-propelled movement of an organism from one location to another through water, often by means of active fin movement.

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EOL has data for 70 attributes, including:

age at eye opening
- URI: http://eol.org/schema/terms/AgeAtEyeOpening
- Definition: Age at which both eyes are fully open after birth.
- Comment: Add to VT postnatal growth trait ontology
- Attribution: Kate E. Jones, Jon Bielby, Marcel Cardillo, Susanne A. Fritz, Justin O''Dell, C. David L. Orme, Kamran Safi, Wes Sechrest, Elizabeth H. Boakes, Chris Carbone, Christina Connolly, Michael J. Cutts, Janine K. Foster, Richard Grenyer, Michael Habib, Christopher A. Plaster, Samantha A. Price, Elizabeth A. Rigby, Janna Rist, Amber Teacher, Olaf R. P. Bininda-Emonds, John L. Gittleman, Georgina M. Mace, and Andy Purvis. 2009. PanTHERIA, a species-level database of life history, ecology, and geography of extant and recently extinct mammals. Ecology 90:2648. http://esapubs.org/archive/ecol/E090/184/
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0 days
age at maturity
- URI: http://eol.org/schema/terms/AgeAtMaturity
- Definition: Age at the first successful reproduction.
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1825 days
body shape
- URI: http://eol.org/schema/terms/BodyShape
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bilaterally symmetric
- URI: http://purl.obolibrary.org/obo/PATO_0001324
- Definition: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves
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diet breadth
- URI: http://eol.org/schema/terms/DietBreadth
- Definition: Number of dietary categories eaten by an organism.
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2
diet includes
- URI: http://eol.org/schema/terms/Diet
- Definition: Information about the items eaten by this organism.
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fish
- URI: https://www.wikidata.org/entity/Q152
- Definition: vertebrate animal that lives in water and (typically) has gills
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dispersal age
- URI: http://eol.org/schema/terms/DispersalAge
- Definition: Age at which young permanently leave the parent, parental group, social group or any associated territories.
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21 days
ecomorphological guild
- URI: http://eol.org/schema/terms/EcomorphologicalGuild
- Definition: organisms that share certain morphological traits due to adaptation to similar environments and ecological roles
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fossorial and/or ground dwelling
- URI: http://eol.org/schema/terms/fossorialOrGround
- Definition: An organism that is adapted to terrestrial life below ground, on or near the ground.
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first appearance
- URI: http://eol.org/schema/terms/FossilFirst
- Definition: The first appearance of this taxon in the fossil record.
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2.588 million years ago
habitat breadth
- URI: http://eol.org/schema/terms/HabitatBreadth
- Definition: Number of habitat layers used by an organism
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2
inter-birth interval
- URI: http://eol.org/schema/terms/InterBirthInterval
- Definition: The length of time between successive births of a female.
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365 days
litters per year
- URI: http://eol.org/schema/terms/LittersPerYear
- Definition: Number of litters per female per year
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0.93
mating system
- URI: http://eol.org/schema/terms/MatingSystem
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not monogamous
- URI: http://eol.org/schema/terms/notMonogamous
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Known occurrences, collected specimens and observations of Grey Seal. View this species on GBIF

Tanya Dewey, Animal Diversity Web cc-by-nc-sa-3.0

Grey Seal includes 2 children: