Mycteroperca microlepis, Gag : fisheries, gamefish

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Mycteroperca microlepis (Goode & Bean, 1879)

Gag
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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Mycteroperca microlepis   AquaMaps   Data sources: GBIF OBIS
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Image of Mycteroperca microlepis (Gag)
Mycteroperca microlepis
Picture by Cox, C.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > Perciformes (Perch-likes) > Serranidae (Sea basses: groupers and fairy basslets) > Epinephelinae
Etymology: Mycteroperca: Greek, mykter, -eros = nose + Greek, perke = perch (Ref. 45335).  More on authors: Goode & Bean.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; marien; brakwater rifbewoner; oceanodroom (Ref. 51243); diepteverspreiding 30 - 160 m (Ref. 89707).   Subtropical; 40°N - 27°S, 98°W - 38°W (Ref. 5222)

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Western Atlantic: North Carolina, USA (with juveniles occurring as far north as Massachusetts) to the Yucatan Peninsula, Mexico. Rare in Bermuda; one record in Cuba; also reported from eastern Brazil.

Length at first maturity / Size / Gewicht / Leeftijd

Maturity: Lm 63.1, range 51 - ? cm
Max length : 145 cm TL mannelijk/geslacht niet bekend; (Ref. 40637); common length : 50.0 cm TL mannelijk/geslacht niet bekend; (Ref. 3708); Maximaal gepubliceerd gewicht: 36.5 kg (Ref. 40637); Maximaal vermelde leeftijd: 31 jaren (Ref. 118445)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 11; Dorsale zachte stralen (totaal): 16-18; Anale stekels 3; Anale zachte stralen: 10 - 12. Distinguished by the following characteristics: adult females and juveniles are generally brownish grey with dark vermiculations; camouflage phase has 5 dark brown saddles separated by short white bars below the dorsal fin; large males sometimes display a "black-belly" and "black-back" phase; black-belly phase is mostly pale grey, with faint dark reticulations below soft dorsal fin, belly and ventral part of the body above anal fin black, as are margin of the soft dorsal fin, central rear part of caudal fin and rear margins of pectoral and pelvic fins; depth of body contained 3.0-3.5 times in SL; head length 2.5-2.7 times in SL; convex interorbital area; angle of preopercle produced into a rounded lobe bearing enlarged serrae; posterior nostrils of adults much larger than anterior ones; smooth lateral body scales, except those covering pectoral fin (Ref. 89707).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Juveniles occur in estuaries and seagrass beds; adults are usually found offshore on rocky bottom (rarely to 152 m), occasionally inshore on rocky or grassy bottom. It is the most common grouper on rocky ledges in the eastern Gulf of Mexico. Adults are either solitary or in groups of 5 to 50 individuals; feed mainly on fishes, some crabs, shrimps, and cephalopods. Juveniles (less than 20 cm) feed mainly on crustaceans that live in shallow grass beds.

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Indeterminate, multiple spawner (Ref. 86690).

Voornaamste referentie Upload your references | Referenties | Coördinator : Heemstra, Phillip C. | Medewerkers

Heemstra, P.C. and J.E. Randall, 1993. FAO Species Catalogue. Vol. 16. Groupers of the world (family Serranidae, subfamily Epinephelinae). An annotated and illustrated catalogue of the grouper, rockcod, hind, coral grouper and lyretail species known to date. Rome: FAO. FAO Fish. Synop. 125(16):382 p. (Ref. 5222)

Status op de Rode Lijst van het IUCN (Ref. 120744)

  Kwetsbaar, zie IUCN Rode Lijst (VU) (A4bd); Date assessed: 21 November 2016

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Preferred temperature (Ref. 115969): 18.3 - 27.1, mean 23.8 (based on 123 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00662 - 0.01902), b=3.03 (2.89 - 3.17), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.7   ±0.4 se; Based on diet studies.
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.12-0.16; tm=3-8; tmax=16; Fec>10,000).
Prior r = 0.51, 95% CL = 0.34 - 0.77, Based on 1 stock assessment.
Kwetsbaarheid (Ref. 59153):  High vulnerability (62 of 100) .
Prijsklasse (Ref. 80766):   Very high.