Actinopterygii (Straalvinnigen) >
Perciformes (Perch-likes) >
Sparidae (Porgies)
Etymology: Diplodus: Greek, diploos = twice + Greek, odous = teeth (Ref. 45335).
Omgeving / Klimaat / Range
Ecologie
; marien; brakwater benthopelagisch; diepteverspreiding 0 - 90 m (Ref. 4781). Subtropical, preferred 11°C (Ref. 107945); 49°N - 27°N, 19°W - 42°E
Eastern Atlantic: Canary islands, also found along the coast of Portugal northward to the Bay of Biscay, Mediterranean, Black Sea and Sea of Azov (Ref. 4781).
Length at first maturity / Size / Gewicht / Leeftijd
Maturity: Lm 11.2, range 8 - 19.6 cm
Max length : 25.3 cm TL mannelijk/geslacht niet bekend; (Ref. 33903); common length : 13.0 cm TL mannelijk/geslacht niet bekend; (Ref. 3397); Maximaal vermelde leeftijd: 7 jaren (Ref. 26328)
Dorsale stekels (totaal): 11; Dorsale zachte stralen (totaal): 11-13; Anale stekels 3; Anale zachte stralen: 11 - 12
Inhabit chiefly Zostera seagrass beds but also found on Posidonia beds and sandy bottoms, rarely on rocky bottoms. Carnivorous, feed on worms, crustaceans, mollusks, echinoderms and hydrozoans. The sexes are separated, although these fish are potential hermaphrodites; certain individuals are protandric (Ref. 4781).
Normally sexes are separate but some individuals are protandrous due to geographical variation in sexual pattern (Ref. 103751). However, histological studies confirm no degenerating functional tissue of one sex (e.g. vitellogenic or later-stage follicles) and no proliferation of tissue of the other sex can be found on this species indicating the absence of sex change. This particular condition is also known as nonfunctional hermaphroditism previously known as rudimentary hermaphroditism (Ref. 91314). Also Ref. 28504.
Bauchot, M.-L. and J.-C. Hureau, 1990. Sparidae. p. 790-812. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 2. (Ref. 3688)
Status op de Rode Lijst van het IUCN (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Gevaarlijk voor mensen
Harmless
Gebruik door de mens
Visserij: commercieel; vis voor de hengelsport: ja
Meer informatie
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Estimates of some properties based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01202 (0.01088 - 0.01329), b=3.07 (3.05 - 3.09), in cm Total Length, based on LWR estimates for this species (Ref.
93245).
Trophic Level (Ref.
69278): 3.6 ±0.0 se; Based on diet studies.
Weerstandsvermogen (Ref.
69278): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.2-0.5; tmax=7; Fecundity=18,000 - 212,000).
Prior r = 0.68, 2 SD range = 0.38 - 1.22, log(r) = -0.39, SD log(r) = 0.29, Based on: 2 M, 16 K, 9 tgen, 1 tmax, 3 Fec records
Kwetsbaarheid (Ref.
59153): Low to moderate vulnerability (27 of 100) .
