Polyamblyodon gibbosum (Pellegrin, 1914)
Knife-back seabream
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Polyamblyodon gibbosum
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Picture by SFSA
Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Eupercaria/misc (Various families in series Eupercaria) > Sparidae (Porgies)
Etymology: Polyamblyodon: Greek, poly = a lot of + Greek, amblys = blunt + Greek, odous = teeth (Ref. 45335).
More on author: Pellegrin.
Etymology: Polyamblyodon: Greek, poly = a lot of + Greek, amblys = blunt + Greek, odous = teeth (Ref. 45335).
More on author: Pellegrin.
Environment: milieu / climate zone / depth range / distribution range Ecology
Marine; reef-associated. Subtropical
Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Western Indian Ocean: Beira, Mozambique to Natal, South Africa and Madagascar.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 60.0 cm TL male/unsexed; (Ref. 3507); common length : 35.0 cm TL male/unsexed; (Ref. 3507)
Max length : 60.0 cm TL male/unsexed; (Ref. 3507); common length : 35.0 cm TL male/unsexed; (Ref. 3507)
Short description Identification keys | Morphology | Morphometrics
Dorsal spines (total): 11; Dorsal soft rays (total): 13; Anal spines: 3; Anal soft rays: 10 - 11. Grey-blue in color.
Body shape (shape guide): fusiform / normal.
Body shape (shape guide): fusiform / normal.
Caught usually near rocky reefs. Feeds on invertebrates, mainly crustaceans and mollusks. Utilized fresh.
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Main reference
Upload your references | References | Coordinator | Collaborators
Smith, J.L.B. and M.M. Smith, 1986. Sparidae. p. 580-594. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 3198)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Least Concern (LC) ; Date assessed: 02 December 2009
CITES
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: subsistence fisheries
FAO - Publication: search | FishSource |
More information
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Anatomy
Gill area
Brain
Otolith
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
Genome
Genetics
Heterozygosity
Heritability
Genetic Diversity
Genome
Genetics
Heterozygosity
Heritability
Genetic Diversity
Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Tools
Special reports
Download XML
Internet sources
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record
Estimates based on models
|
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.01259 (0.00609 - 0.02604), b=3.03 (2.86 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
Trophic level (Ref. 69278) |
3.6 ±0.50 se; based on food items. |
|
Resilience (Ref. 120179) |
Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.). |
|
Fishing Vulnerability (Ref. 59153) |
High vulnerability (56 of 100). 🛈 |
|
Price category (Ref. 80766) |
Very high. |