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Melichthys niger  (Bloch, 1786)

Black triggerfish
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Melichthys niger   AquaMaps   Data sources: GBIF OBIS
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Image of Melichthys niger (Black triggerfish)
Melichthys niger
Picture by Luiz, Jr., O.


Philippines country information

Common names: Pakol, Totong
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: minor commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Edible but flesh may be poisonous (Ref. 12745).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Aliño, P. and E.D. Gomez, 1991
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Tetraodontiformes (Puffers and filefishes) > Balistidae (Triggerfishes)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 50.0 cm TL male/unsexed; (Ref. 5217); common length : 30.0 cm TL male/unsexed; (Ref. 3272)

Environment

Marine; reef-associated; depth range 0 - 75 m (Ref. 9710), usually 0 - 20 m (Ref. 40849)

Climate / Range

Subtropical, preferred ?; 30°N - 29°S, 180°W - 180°E

Distribution

Circumtropical. Western Pacific: Ryukyu and Ogasawara islands eastward to the Tuamoto Islands. Eastern Pacific: San Diego, California, USA to Malpelo Island, Colombia (Ref. 9276). Western Atlantic: Florida, USA and Bahamas to Brazil (Ref. 7251). Reported from the Gulf of Mexico (Ref. 46995) but see Ref. 26938. Eastern Atlantic: St. Paul's Rocks (13121), St. Helena, Ascension Island, Rolas Island, and Cape Verde (Ref. 7348). São Tomé Island (Ref. 34088). Western Indian Ocean: Durban, Natal, South Africa (Ref. 4420). Uncommon in most areas but abundant around isolated oceanic islands (Ref. 9710).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 3; Dorsal soft rays (total): 30-35; Anal spines: 0; Anal soft rays: 28 - 31. A dark greenish-black triggerfish with purplish overtones. Pale blue lines along bases of soft dorsal and anal fins. Scales of rear part of body have prominent keels that form longitudinal ridges (Ref. 26938).

Biology     Glossary (e.g. epibenthic)

Inhabit clear seaward reefs. More common around oceanic islands (Ref. 9276). Found on inner and outer reef crests, usually near the slope or drop-off to deeper water, where in small but loose aggregations. Sometimes swim high above substrate feeding on zooplankton (Ref. 48637). Benthopelagic (Ref. 58302). Diet consists primarily of calcareous algae and zooplankton (Ref. 1602); also feed on phytoplankton (Ref. 5213). At Fernando de Noronha Archipelago, southeast Atlantic, groups of about 100 individuals join groups of spinner dolphins to feed on feces and vomits of the cetaceans when they congregate in a shallow bay for rest and social interactions. The postures a dolphin adopts prior to defecating or vomiting are recognized, and the fish begin to converge to the dolphin shortly before the actual voiding. Offal feeding may be regarded as a simple behavioral shift from plankton feeding to drifting offal picking (Ref. 48727). Marketed fresh (Ref. 9770).

IUCN Red List Status (Ref. 115185)

Threat to humans

  Harmless



Human uses

Fisheries: minor commercial; aquarium: commercial

More information

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
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Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
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References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
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Processing
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Ciguatera
Speed
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Gill area
Otoliths
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Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
2.4   ±0.0 se; Based on diet studies.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Vulnerability (Ref. 59153)
Moderate vulnerability (44 of 100)
Price category (Ref. 80766)
Medium