Otariidae
Enable an agent to recognise Otariidae, distinguish family membership from species and individual identity, and assess observations, ecological condition and appropriate responses using evidence at the correct biological scale.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise Otariidae, distinguish family membership from species and individual identity, and assess observations, ecological condition and appropriate responses using evidence at the correct biological scale.
Otariidae is the family of pinniped mammals comprising sea lions and fur seals, distinguished from other living pinnipeds by external ear flaps and hind flippers that can rotate forward to support movement on land.
It can be Evaluate an identification from photographs, field notes or specimen evidence and retain unresolved species identity.; Attach species and population records to the family while preserving their narrower scope.; Compare body condition, diving effort or breeding observations against an appropriate species, sex, age and seasonal reference.; Map links between haul-outs, breeding sites and observed marine use.; Assess whether survey observations support an abundance or trend claim.; Prepare an evidence-based disturbance, entanglement or stranding report for the applicable response authority..
Distinguishing features
Visible external ear flaps support identification as an otariid rather than a true seal; record whether the ears were actually visible. [NOAA Fisheries](https://www.fisheries.noaa.gov/seals-sea-lions)
Hind flippers that rotate beneath the body for terrestrial walking distinguish otariids from true seals; use observed movement rather than posture alone. [NOAA Fisheries](https://www.fisheries.noaa.gov/feature-story/it-seal-or-sea-lion)
Elongated foreflippers provide a supporting anatomical distinction from the smaller foreflippers of true seals; require corroborating features for incomplete images. [NOAA Ocean Service](https://oceanservice.noaa.gov/facts/seal-sealion.html)
Otariidae includes both sea lions and fur seals: a fur-seal common name must not cause classification under Phocidae, and a sea-lion-only record does not describe the whole family. [Society for Marine Mammalogy](https://marinemammalscience.org/science-and-publications/list-marine-mammal-species-subspecies/)
Scope
+ Family boundaries, accepted member taxa and evidence supporting identification
+ Diagnostic external anatomy and aquatic versus terrestrial locomotion
+ Marine foraging, terrestrial haul-out use and connections between these habitats
+ Breeding, maternal care, development and seasonal aggregation
+ Individual condition, population observations and evidence needed to select an appropriate response
- Phocidae, the true seals, and Odobenidae, the walrus family, except for diagnostic comparisons
- Complete species-specific models or individual animal identity records
- Standalone models of rookeries, marine habitats and food webs
- Veterinary diagnosis, treatment protocols and rehabilitation facility operations
- Fishing equipment, vessel operations and the full legal instruments governing human interaction
Characteristics
- Taxonomic assignment
- Family Otariidae; linked genus, species or unresolved member; authority and version Separates secure family identification from an unsupported species assignment.
- Observation subject scale
- Individual, aggregation, breeding colony, population, species or family Prevents an animal's condition or a colony count from being attributed to the family as a whole.
- Diagnostic feature visibility
- External ear flaps, foreflipper form and hind-flipper rotation: observed, obscured, absent or uncertain Distinguishes missing evidence from evidence against identification.
- Body size
- Mass in kg and standard body length in cm; method, date, species, sex and age class Supports comparisons without treating species, sex or developmental differences as abnormal condition.
- Life stage and reproductive state
- Pup, juvenile, adult or unknown; nursing, pregnant, lactating, breeding, other or unknown, with evidence Changes how presence ashore, dependency and seasonal behaviour should be interpreted.
- Haul-out or rookery association
- Named or georeferenced site; resting, breeding, mixed or unresolved use; observation dates Connects marine observations to terrestrial sites without assuming every aggregation is a breeding colony.
- Foraging and diving activity
- Dive depth in m, dive duration in min and trip duration in h or days; individual and sampling method Allows species-specific assessment of marine habitat use and effort.
- Observed condition
- Species-appropriate body-condition score, mobility, visible wounds, entanglement and responsiveness; unknown allowed Supports response triage while separating observations from clinical diagnosis.
- Abundance evidence
- Animals or pups counted; survey area, date, effort, detection assumptions and uncertainty Keeps a haul-out count distinct from a population estimate.
- Applicable protection and response authority
- Species or population, jurisdiction, current instrument, effective date and authorised responder Makes response decisions specific to the animal's location and taxonomic identity.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
Family identity and membership Establish what the registry entry denotes and how observations and narrower taxa relate to it.
Otariidae is a family containing sea lions and fur seals, so the model must avoid confusing a taxon with one animal or one common-name group.
Taxonomic circumscription
Record the authority and scope used to delimit the family.
Authority-bounded membership
Require a dated taxonomic authority for accepted member taxa and record alternative names without silently creating additional registry things.
- Which authority and version define the accepted genera and species assigned to Otariidae? provenance
- Does the adopted circumscription include extinct and fossil members, or only living taxa? boundary
Field identification
Evaluate family and species assignments from observable evidence.
Corroborated otariid identification
Record visible diagnostic features, identification confidence and plausible alternatives; allow family-level identification when species evidence is insufficient.
- Which ear, flipper and movement features were observed, and which were obscured? measurement
- What evidence distinguishes this observation from a true seal, walrus or another otariid species? boundary
Amphibious body and performance Represent anatomy and performance across water and land.
Recognition and condition assessment depend on the otariid combination of flipper anatomy, terrestrial mobility and aquatic activity.
Body form and covering
Contextualise measurements and external appearance.
Size and pelage context
Interpret size, coat appearance and body condition against species, sex, development, wetness and moult rather than a family-wide norm.
- What species, sex and age evidence makes the chosen body-size or condition reference appropriate? provenance
- How were length, mass and coat condition recorded, including wetness and possible moult? measurement
Locomotion and dive performance
Separate observed capability from inferred impairment.
Movement in context
Record land movement, swimming and diving with the observation conditions; avoid assigning uniform performance limits to all family members.
- What terrestrial movement, swimming behaviour or dive measurements were directly observed? measurement
- What species-specific evidence would justify flagging the observed movement as impaired? action
Marine foraging and shore use Connect feeding observations and marine movements to terrestrial site use.
An otariid's ecological context spans marine feeding areas and places ashore; either setting alone gives an incomplete interpretation.
Prey and foraging evidence
Qualify claims about diet and feeding effort.
Method-qualified diet
Attach prey and foraging claims to a species, place, season and evidence method rather than extrapolating them across Otariidae.
- Which prey identifications come from direct observation, samples or another stated analytical method? provenance
- What trip duration, dive pattern or feeding observation supports the inferred foraging effort? measurement
Haul-out connectivity
Identify terrestrial site functions and evidence of movement between sites and sea.
Site function and association
Distinguish resting sites from breeding rookeries and distinguish observed movement links from geographic proximity.
- What observations establish whether this site supports resting, breeding or both? definition
- Which resightings or tracking records connect animals at this site to marine areas or other haul-outs? provenance
Breeding and development Represent reproduction, maternal relationships and progression through life stages.
Breeding attendance and pup dependency affect the meaning of colony observations and apparent separation.
Breeding aggregation
Resolve reproductive activity within a specific species and colony.
Local reproductive cycle
Require local evidence for breeding timing, territorial activity and births rather than assuming one calendar or social pattern throughout the family.
- What dated observations establish births, mating or territorial breeding activity at this colony? provenance
- Which species, sex and age classes are represented in the aggregation? measurement
Maternal care and pup development
Interpret dependency, attendance and developmental state.
Dependency and separation evidence
Record nursing, mother-pup association and repeated attendance observations; a single unattended-pup observation does not establish abandonment.
- What evidence supports the pup's age, nursing status and association with a particular adult? provenance
- What species-specific attendance information and repeat observations are needed before escalating suspected separation? action
Condition, populations and response Connect biological observations to defensible assessment and response.
Visible animal distress, colony attendance and population change require different evidence and lead to different actions.
Individual condition and exposure
Record observable injury, disturbance and interactions with human activity.
Evidence-based response triage
Separate observed entanglement, wounds, behaviour and location from inferred diagnosis, and link proposed intervention to an applicable authorised responder.
- What visible signs, timing and photographs support concern about injury, entanglement or disturbance? measurement
- Which current local guidance and response authority govern the next action for this species and location? action
Population assessment
Qualify abundance, trend and conservation interpretations.
Survey and status scale
Preserve survey coverage and detectability assumptions, and attach conservation assessments to their actual species or population and assessment date.
- Does the reported number represent animals ashore, pups counted or an estimated population, and what uncertainty accompanies it? measurement
- Which population boundary, assessment source and date support the stated trend or conservation status? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This describes a biological family, not a chemical substance or material; the batch's substance-specific guidance does not apply.
- Sea lions and fur seals are familiar groupings; their treatment as formal subfamilies and the accepted species count require taxonomic verification.
- Measurements are approximate family-wide envelopes; species, sex and measurement method must be specified for precise comparisons.
- Which of these check these first hold for the sense of Otariidae this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Sea lions
- Fur seals
- Which of these kinds and varieties hold for the sense of Otariidae this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Zoological scientific nomenclature - Otariidae - Family name; individual species have binomial scientific names.
- Which of these identifiers and schemes hold for the sense of Otariidae this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- International Code of Zoological Nomenclature, maintained by the International Commission on Zoological Nomenclature, governs zoological naming.
- United States Marine Mammal Protection Act protects marine mammals, including otariids; NOAA Fisheries administers protections for seals and sea lions.
- Which of these standards and regulation hold for the sense of Otariidae this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Taxonomic classification of sea lions and fur seals.
- Population monitoring and marine conservation planning.
- Research on diving physiology, locomotion and marine food webs.
- Management of interactions between pinnipeds and fisheries.
- Which of these real-world use hold for the sense of Otariidae this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Adult body mass - Approximately 25-1000 across species and sexes - kg
- Adult body length - Approximately 1-3.3 across species and sexes - m
- Which of these typical measurements hold for the sense of Otariidae this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Entanglement and drowning in fishing gear.
- Food shortages associated with ocean warming and changes in prey availability.
- Disturbance or loss of breeding and resting habitat.
- Exposure to infectious disease, contaminants and harmful algal toxins.
- Bites and other injuries during close encounters with humans.
- Which of these failure modes and hazards hold for the sense of Otariidae this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Native distribution includes the North Pacific and parts of the Southern Hemisphere; no living otariids are native to the North Atlantic.
- Species differ in breeding habitat, migration, prey and responses to local ocean conditions.
- Legal protections and permitted management actions vary by species and jurisdiction.
- Which of these regional variation hold for the sense of Otariidae this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Phocidae - True seals lack external ear flaps and cannot rotate their hind flippers forward for walking.
- Odobenidae - The walrus family lacks external ear flaps and its living representative has enlarged upper canine tusks.
- Pinnipedia - The broader group includes Otariidae, Phocidae and Odobenidae.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Otariidae this model covers, and on what evidence? provenance
What the second pass must settle
- Which taxonomic authority should govern registry membership, and how should conflicting species names or revisions be reconciled?
- Should this registry model include fossil otariids, whose identification may require diagnostic evidence unavailable from living-animal field observations?
- Which species-, sex- and age-specific reference datasets are adequate for interpreting size, body condition and dive performance?
- What local breeding and maternal-attendance evidence is available to distinguish expected pup separation from a response-worthy situation?
- Which population boundaries, survey corrections and jurisdiction-specific response sources should be linked for the first intended deployment?