Fiche d'espèce de Copépode
Cyclopoida ( Ordre )
    Oithonidae ( Famille )
        Dioithona ( Genre )
Dioithona oculata  Farran, 1913   (F,M)
Syn.: Oithona oculata Farran, 1913 a (p.188, Descr.F, figs.F); Rosendorn, 1917 (p.303); 1917 a (p.37, figs.F,M, Descr.M); Kiefer, 1929 g (p.10, Rem.F,M); Dakin & Colefax, 1933 (p.208); 1940 (p.116, fig.M); Sewell, 1947 (p.254, Rem.M); Tanaka, 1960 (p.60, figs.F); Björnberg, 1963 (p.76, Rem.: Juv.); Vervoort, 1964 a (p.25, Rem.); Gonzalez & Bowman, 1965 (p.273, figs.F,M, Rem.); Emery, 1968 (p.293, swarm); Wellershaus, 1970 (p.473); Björnberg, 1972 (p.82; fig., Rem. Nauplius); Kos, 1972 (Vol. I, figs.F, Rem.); Yeatman, 1976 (p.213, figs.F); Nishida & al., 1977 (p.139, figs.F, Rem.); Hamner & Carleton, 1979 (p.1, swarms); Dawson & Knatz, 1980 (p.9, figs.F,M); Ferrari & Bowman, 1980 (p.4, figs.F,M); Ueda & al., 1983 (p.165, Table 1, 2, 4, swarms); Ueda, 1985 (p.125); Nishida, 1985 a (p.63, Descr.F,M, figs.F,M, p.143, 144); Ferrari & Ambler, 1992 (p.275, Rem.: N); Yoo & Lim, 1993 (p.91, Rem.: p.95, 100, Table 1, fig.2); Kim & al., 1993 (p.271); Chihara & Murano, 1997 (p.938, Pl. 197, 202: F,M); Bradford-Grieve & al., 1999 (p.886, 966, figs.F,M); McKinnon, 2000 (p.108, Rem.); Ref. compl.: Sewell, 1948 (p.417) ; Sander & Moore, 1979 (p.215, zoogeographic chart); Hammer & Carleton, 1979 (p.1); Ueda & al., 1983 (p.165, Table 1, 2, 4, 5, swarms); Lindo, 1991 (tab.3); Yoo, 1991 (tab.1); McKinnon, 1991 (p.471); Madhupratap & al., 1991 (p.947, Rem.: p.951, 954, 956); Webber & al., 1996 (tab.1); Hopcroft & al., 1998 (tab.2); Suarez-Morales & Gasca, 1998 a (p.112); Ueda & al., 2000 (tab.1); Ueda, 2001 (p.96, occurrence); Dunbar & Webber, 2003 (tab.1); Hernandez Molejon & Alvarez-Lajonchere, 2003 (p.471, predation); Rezai & al., 2004 (p.490, tab.2, 3, abundance, Rem., p.495, tab.8); Lo & al., 2004 (p.468, tab.2); Choi & al., 2005 (p.710: Tab.III); Sterza & Fernades, 2006 (p.95, Table 1, occurrence); Elliott & Kaufmann, 2007 (p.418); Ohtsuka & al., 2008 (p.115, Table 5); Hidalgo & al., 2010 (p.2089, Table 2); Medellin-Mora & Navas S., 2010 (p.265, Tab. 2); Fazeli & al., 2010 (p.153, Table 1); Maiphae & Sa-ardrit, 2011 (p.641, Table 2); Magris & al., 2011 (p.260, abundance, interannual variability); DiBacco & al., 2012 (p.483, Table S1, ballast water transport); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.); Araujo & al., 2016 (p.1, Table 3, abundance, %); Rosa J.C.L. & al., 2016 (p.71, Rem.); Ohtsuka & Nishida, 2017 (p.565, 578, Table 22.1, Rem.);
O. (Dioithona) oculata : Shuvalov, 1980 (p.172, figs.F,M); Conway & al., 2003 (p.199, figs.F,M, Rem..
Ref.:
Ferrari, 1993 (p.764); Ambler & al., 1991 (p.1257); 1996 (p.287); Buskey & al., 1996 (p.301, photoreception, swarming); Boxshall & Halsey, 2004 (p.611); Rasch & Wyngaard, 2006 (p.627: tab.1, genome size); Ferrari & Dahms, 2007 (p.23, 26, 29, 30, Rem. N, p.42, 57, 58, 59, 63, 87, figs. copepodites I-VI, fig.28: P3); Terbiyik Kurt, 2018 (p.569, table 2, fig.3, 4, 5, 6, 7, 8, morphological characters, , abundance, interannual variations)
Espèce Dioithona oculata - Planche 1 de figures morphologiquesissued from : F.D. Ferrari & T.E. Bowman in Smiths. Contr. Zool., 1980, 312. [p.5, Fig.1]. As Oithona oculata.
Female (from Caribbean area): a, P4; b, urosome (lateral left side); c, urosomal segment 1 and2 with spermatophore (lateral left side).
Nota: Exopodal segment 2 of P4 with both setae modified, slightly curved toward their tips (proximal seta with serrate flange on distal 1/3 of medial edge, distal seta with serrate flange on distal 1/4); endopodal segment 3 proximal seta similarly modified with serrate flange on distal 1/6. Genital segment with knob near genital opening armed with anterodorsally curved spine, bearing tiny distinct teeth on posterior margin, below this spine a small point. Spermatophores attached ventrally on the genital segment, a small tubule passes dorsally from spermatophore (genital opening not identified, it may be located near the termination of the spermatophore tubule but it appears that the tubule empties into a sulcus or groove formed by two ridges of the integument; the ridges, depicted by heavy lines, extend dorsally on each side of the armed knob).

Male: cephalothorax in lateral view produced into a small triangular extension near posterior ventral edge. Integumental organs scattered over the lateral surface (organs: see figure below).


Espèce Dioithona oculata - Planche 2 de figures morphologiquesissued from : F.D. Ferrari & T.E. Bowman in Smiths. Contr. Zool., 1980, 312. [p.24, Fig.15 a].
Male (SEM): a, integumental organ of cephalosome (x 10,000).
Nota: Organs with form of shallow pore without thickened peripheral ridge, small hair arises from the center of pore.


Espèce Dioithona oculata - Planche 3 de figures morphologiquesIssued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.64, Fig.33]. As Oithona oculata.
Female: a, habitus (dorsal); b, thoracic segment 5 and genital segment (ventral); c, anal segment and caudal rami (dorsal); d, A1; e, Md (mandibular palp); f, Md (biting edge); g, Mx1.


Espèce Dioithona oculata - Planche 4 de figures morphologiquesIssued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.65, Fig.34]. As Oithona oculata.
Female: a, A2; b, Mx2; c, Mxp; d, P1; e, P2; f, P3; g, P4.


Espèce Dioithona oculata - Planche 5 de figures morphologiquesIssued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.66, Fig.35]. As Oithona oculata.
Male: a, habitus (dorsal); b, forehead (lateral); c, thoracic segment 5 and genital segment (lateral right side); d, anal segment and caudal rami (dorsal); e, A1; f, Md; g, Mx1.


Espèce Dioithona oculata - Planche 6 de figures morphologiquesIssued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.67, Fig.36]. As Oithona oculata.
Male: a, A2; b, Mx2; c, Mxp; d, P1; e, P2; f, P3; g, P4.


Espèce Dioithona oculata - Planche 7 de figures morphologiquesissued from : G.P. Farran in Proc. zool. Soc. Lond., 1913. [Plate XXXI, Figs.2-9]. As Oithona oculata.
Female (from Christmas Island, Indian): 2, habitus (dorsal); 3,idem (lateral); 4, A1; 5, Md (mandibular palp); 6, Mx1; 7-9, P1 to P3.
Nota: Proportional lengths of urosomal segments and caudal rami 7:18:10:9:8:8. Caudal rami about two and half times as long as wide, with an outer edge seta located in the middle of the outer margin. Rostrum absent; cephalon slightly produced into a rostral prominence; the cephalic ganglia form a large bilobed mass, in front of which are situated, in the rostral prominence, a pair of small clear refractive areas. A1 reaches to the 2nd thoracic segment; proportional lengths of segments 11:6:16:11:12:12:16:7:13:4:9:6; 3rd segment with an imperfect separation near its proximal end, 4th segment with a small spine distally on its upper margin. P5 with 2setae

For Farran, this species is closely allied to O (= Dioithona) rigida, differing mainly from it in the greater length of the terminal spines of the swimming legs: in rigida, as figured by Giesbrecht1897) and Cleve (1901), these spines are shorter than the terminal segments of the exopodites; another difference is the comparatively large size of the inner edge setae on the 1st segments of the exopodites in rigida, in oculata they are very small.


Espèce Dioithona oculata - Planche 8 de figures morphologiquesissued from : G.P. Farran in Proc. zool. Soc. Lond., 1913. [Plate XXX, Figs.8-9]. As Oithona oculata.
Female: 8, Mxp; 9, P4.
Nota: Proportion of total lengths (p.cent) Prosome : 58.75, Urosome : 41.25 . Relative lengths of urosomal segments and caudal rami: 7 : 17 : 8 : 8 : 7 : 8. Setal formula of the exopod swimming legs P1 to P4 (Se = outer setae ; Si = inner setae), P1 : 1, 1, 3 Se ; 1, 1, 4 Si ; P2 : 1, 1, 3 Se ; 1, 1, 5 Si ; P3 : 1, 1, 3 Se ; 1, 1, 5 Si ; P4 : 1, 1, 2 Se ; 1, 1, 5 Si .


Espèce Dioithona oculata - Planche 9 de figures morphologiquesissued from : I. Rosendorn in Wiss. Ergebn. dt. Tiefsee-Exped. \"Valdiviella\", 1917, 23. [p.38, Fig.23]. As Oithona oculata.
Male: a, habitus (dorsal); b, Md mandibular palp); c, Mx1; d, exopod of P1; e, exopod of P2; f, exopod of P3; g, exopod of P4.
Nota: Proportion of lengths (p.cent) Prosome : 61.54, Urosome : 38.46 . Relative lengths of urosomal segments and caudal rami: 12 : 14 : 11 : 11: 10 : 10 : 9. Setal formula of the exopod swimming legs P1 to P4 (Se = outer setae ; Si = inner setae), P1 : 1, 1, 3 Se ; 1, 1, 4 Si ; P2 : 1, 1, 3 Se ; 1, 1, 5 Si ; P3 : 1, 1, 3 Se ; 1, 1, 5 Si ; P4 : 1, 1, 2 Se ; 1, 1, 5 Si .

Female: P5 with 2 setae.


Espèce Dioithona oculata - Planche 10 de figures morphologiquesIssued from : S. Nishida, O. Tanaka & M. Omori in Bull. Plankton Soc. Japan, 1977, 24 (2). [p.140, Fig.13]. As Oithona oculata.
Female (from Aburatsubo cove, Sagami Bay): a, habitus (dorsal), b, forehead (lateral); c, 4th thoracic segment, 5th thoracic segment with P5 and genital segment; d, Md; e, Mx1; f, P1; g, P2; h, P3; i, P4.
Prosome length/urosome length = 1.45.
Nota: Setae formula of exopod P1 to P4 are the same as those for Oithona nana.


Espèce Dioithona oculata - Planche 11 de figures morphologiquesIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [Pl. XXVI, 5-10]. As Oithona oculata.
Female (from 35°09'S, 20°13'E): 5, head (lateral); 6, forehead (dorsal); 7, urosome (dorsal); 8, Md; 9, P1; 10, P4.

Nota: Prosome and urosome in proportional lengths 58 to 32.
Rostrum not visible from the dorsal, represented by a blunt process.
The last thoracic segment has on each side a small spine on the postero-lateral margin.
Urosomal segments and caudal rami in the proportional lengths 13 : 29 : 15 : 16 : 12 : 15 = 100.


Espèce Dioithona oculata - Planche 12 de figures morphologiquesIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [p.61]. As Oithona oculata.
Female: Number of outer marginal spines and inner marginal setae on the exopodal segments of swimming legs P1 to P4.


Espèce Dioithona oculata - Planche 13 de figures morphologiquesIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [p.61]. As Oithona oculata.
Female: Inner and outer marginal setae on the endopodal segments of swimming legs P1 to P4.


Espèce Dioithona oculata - Planche 14 de figures morphologiquesIssued from K.-I. & D.-H. Lim in The Korean J. Syst. Zool., 1993, 9 (2). [Key of female]: ]Morphological characters of Oithona oculata (= Dioithona oculata) female in Korean waters :
1 - Anterior part of prosome rounded in dorsal view.
2 - Rostrum blunt.
3 - P5 with 2 setae.
4 - Length of exopod 3rd segment in legs P1-P4 shorter than that of terminal spine of exopod 3rd segment.


Espèce Dioithona oculata - Planche 15 de figures morphologiquesIssued from T. Terbiyik Kurt in Turk. J. Zool., 2018, 42 [p.570, Table 2].
Some morphological characteristics of female and male of Dioithona oculata from Iskenderun Bay (Turkey coast, Levantine Basin).


Espèce Dioithona oculata - Planche 16 de figures morphologiquesIssued from T. Terbiyik Kurt in Turk. J. Zool., 2018, 42 [p.572, Fig.4, G, H].
Male (from Iskenderun Bay): G, P5; H, Mx1.


Espèce Dioithona oculata - Planche 17 de figures morphologiquesIssued from T. Terbiyik Kurt in Turk. J. Zool., 2018, 42 [p.571, Fig.3, C].
Female (from Iskenderun Bay): c, Mx1


Espèce Dioithona oculata - Planche 18 de figures morphologiquesIssued from : K.-I. Yoo & D.-H. Lim in The Korean J. Syst. Zool., 1993, 9 (2) [p.99, Fig.2, P]. As Oithona oculata (= Dioithona oculata.
Female (from East and West Korean Waters): P, abdomen (lateral view).

Ref. compl.:
Buskey, 1998 (p.13, Rem.: p.18, swarm & mating); Humphrey, 2008 (p.84: Appendix A); Marques-Rojas & Zoppi de Roa, 2017 (p.495, Table 1); Jerez-Guerrero & al., 2017 (p.1046, Table 1: temporal occurrence); Dias & al., 2018 a (p.189, Rem.: p.196);
NZ: 12

Carte de distribution de Dioithona oculata par zones géographiques
Espèce Dioithona oculata - Carte de distribution 3
Carte de 1996
Espèce Dioithona oculata - Carte de distribution 4issued from in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No.20. [p.144, Fig.95]. As Oithona oculata.
Indo-Pacific georaphical distributio of Dioithona oculata.
Espèce Dioithona oculata - Carte de distribution 5Issued from: T. Terbiyik Kurt in Turk. J. Zool., 2018, 42 [p.573, Fig.6].
Abundance distribution of D. oculata in the study area in Autumn. at Iskenderun Bay. (Stations 1 to 4 between about 36.8190°N-36.8143°N, 35.9327°E-35.9125°E)
Espèce Dioithona oculata - Carte de distribution 6Issued from: T. Terbiyik Kurt in Turk. J. Zool., 2018, 42 [p.574, Fig.7].
The proportion of D. oculata in copepoda and zooplankton in autumn in the Iskendurun Bay.
Samples collected vertically (sampling depth ranged from 5 to 15 m) using a WP2 net (200 µm mesh aperture) at 5 stations in April, July, October and December of each year. Temperature and salinity measured by CTD probe.
Espèce Dioithona oculata - Carte de distribution 7Issued from: T. Terbiyik Kurt in Turk. J. Zool., 2018, 42 [p.569, Fig.2].
Seasonal changes of the sea water temperature and salinity values in the Iskenderun Bay (Levantine Basin, Turkish coast.
1 to 5: Stations in the Bay. Maximum depth of approximately 100 m at the opening of the bay.. Ceyhan River is a major freshwater source for the bay (180 m3 per sec.)
Loc:
South Africa (off Cape of Good Hope), Brazil (.., Guanabara Bay, Vitoria Bay, Bracui estuary, Mucuri estuary); Barbada Is., Caribbean Colombia (Tayrona), Bahia de Mochima (Venezuela), Belize, Caribbean, Jamaica (Kingston Harbour), G. of Mexico, E Medit. (Turkey coast), Gulf of Oman, Arabian Gulf, Laccadives Is. (lagoons), Madagascar (Nosy Bé), Rodrigues Is., Indian, Nicobar Is. (Nankauri Harbour), Christmas Is., Straits of Malacca, China Seas (Yellow Sea, East China Sea), Taiwan (Tapong Bay), Korea (E, S & W), Okinawa (Kabira Bay, lagoons), Japan (Kyushu: Shijiki Bay), Palau Is., Australia (New South Wales, Great Barrier, Coral reef), New Caledonia, Caroline Is., Samoa Is., California (San Pedro Bay), Mission Bay, Bahia Cupica (Colombia), Chile (N)
N: 58
Lg.:
(66) F: 0,89; (104) M: 0,79; (155) F: 0,76; (179) F: 0,7-0,65; M: 0,6; (349) F: 0,9; (627) F: 0,68-0,62; M: 0,63-0,62; (634) F: 0,9; (649) F: 0,8; M: 0,65; (991) F: 0,62-0,8; M: 0,62-0,65; (1238) F: 0,59-0,68; M: 0,59-0,66; {F: 0,59-0,90; M: 0,59-0,79}
Rem.: épipélagique.
Cette espèce d'origine Indo-pacifique serait passée dans l'Atlantique par le Courant des Agulhas.
Observé dans les ballasts des navires à San Francisco.
cette espèce a été observé pour la première fois en Méditerranée (Bassin levantin, Iskenderum Bay, Turquie) en 2013 et déjà abondante en 2016, probablement en provenance du transit à travers le Canal de Suez.
Voir aussi les remarques en anglais
Dernière mise à jour : 03/07/2020

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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2020. - Diversité et répartition géographique chez les Copépodes planctoniques marins. Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 27 septembre 2020]

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