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Nicholsina usta  (Valenciennes, 1840)

Emerald parrotfish
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Native range | All suitable habitat | Point map | Year 2100
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Nicholsina usta   AquaMaps   Data sources: GBIF OBIS
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Image of Nicholsina usta (Emerald parrotfish)
Nicholsina usta
Picture by Cox, C.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Scaridae (Parrotfishes) > Sparisomatinae
Etymology: Nicholsina: After J.T. Nichols, 1920-1941, curator in ichthyology, department of Fishes, American Museum of Nat. History; he has wrote articles in the Encyclopaedia Britannica .

Issue
Issue on validity of subspecies: subspecies considered as valid in FB, elevated to species rank as Nicholsina usta (Valenciennes, 1840) in Eschmeyer (CofF ver. Mar. 2011: Ref. 86697). Please send references, or more studies are needed.

Environment / Climate / Range Ecology

Marine; reef-associated; depth range 1 - 73 m (Ref. 7360).   Tropical; 41°N - 30°S, 98°W - 34°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Western Atlantic: New Jersey, USA and northern Gulf of Mexico to Brazil. Absent in Bermuda, Bahamas and West Indies (except Greater Antilles).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm TL male/unsexed; (Ref. 7251); common length : 18.0 cm TL male/unsexed; (Ref. 3802)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Anal spines: 2; Anal soft rays: 9. Body somewhat elongate, the depth contained 3 to 3.2 times in SL. Snout somewhat pointed; a small dermal cirrus at edge of anterior nostril; teeth fused only basally, thus not fully coalesced to form dental plates. Gill rakers 12 or 13. Caudal fin slightly rounded; pectoral fin-rays 13. Median predorsal scales 4 or 5; 1 row of scales on cheek. Colour: mottled olive green on back, the scales of sides with bluish white centres and reddish edges; head below level of mouth yellow; 2 diagonal narrow red-orange bands on cheek; median fins reddish, dorsal fin with a black blotch at front.

Biology     Glossary (e.g. epibenthic)

Inhabits seagrass beds and open bottom, mostly in shallow water. Larger adults live in deeper water. Not commonly marketed for food (Ref. 52834).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Distinct pairing (Ref. 205).

Main reference Upload your references | References | Coordinator : Westneat, Mark | Collaborators

Robins, C.R. and G.C. Ray, 1986. A field guide to Atlantic coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 354 p. (Ref. 7251)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: subsistence fisheries
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 22.8 - 28, mean 25.7 (based on 400 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00545 - 0.02310), b=3.08 (2.91 - 3.25), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.0   ±0.00 se; Based on food items.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low to moderate vulnerability (27 of 100) .
Price category (Ref. 80766):   High.