Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Pontellidae ( Family )
            Labidocera ( Genus )
Labidocera euchaeta  Giesbrecht, 1889   (F,M)
Syn.: Labidocera euchäta Giesbrecht, 1889 (p.27, Descr. F); 1892 (p.446, 459, 773, figs.F);
Labidocera euchaeta Dimorph 2 Sewell, 1912 (p.341, figs.M);
Labidocera euchaeta minor Sewell, 1932 (p.362); Silas, 1972 (p.649)
Ref.:
Giesbrecht & Schmeil, 1898 (p.135, Rem. F); Sewell, 1912 (p.328, 339, 353, 369, Rem., figs.F,M); 1933 (p.28); Mori, 1937 (1964) (p.93, figs.F); Shen & Bai, 1956 (p.221, figs.F,M); Chen & Zhang, 1965 (p.98, figs.F,M); Fleminger, 1965 (p.125: Rem.); Nyan Taw, 1974 (p.270, Rem.); Silas & Pillai, 1973 (1976) (p.800, Rem.F, figs.F, Rem.); Goswami & Goswami, 1979 a (p.259, figs. caryotypes); Li & Fang, 1983 a (p.375, figs.juv.); Zheng Zhong & al., 1984 (1989) (p.254, figs.F,M); Chihara & Murano, 1997 (p.867, Pl.147,150: F,M)
Species Labidocera euchaeta - Plate 1 of morphological figuresissued from: Q.-c. Chen & S.-z. Zhang in Studia Marina Sinica, 1965, 7. [Pl.40, 6-10].
Female (from E China Sea): 6, habitus (dorsal); 7, P5 (posterior).

Male: 8, habitus (dorsal); 9, right A1; 10, P5 (posterior).


Species Labidocera euchaeta - Plate 2 of morphological figuresIssued from : R.B.S. Sewell in Rec. Indian Mus., 1912, 7. [Pl.XIX, Figs.1-3].
Male (from Bay of Bengal): 1, habitus (lateral right side); 2, A1 (grasping segments); 3, P5.
Nota: Abdomen 5-segmented, 3rd is the longest and the 5th very short; roportional lengths of urosomites and furca as 22:20:30:15:7:22. Grasping organ of A1 has the knee-joint between the 18 th and 19 th segments; the 17th segment bears a spine and the toothed-plate of the 1th is longer than the segment itself and is produced proximally over the 17th; the 19th segment bears a row of 6 angular teeth which increase in size distally.


Species Labidocera euchaeta - Plate 3 of morphological figuresissued from : C.-j. Shen & S.-o. Bai in Acta Zool. sin., 1956, 8 (2). [Pl. V, Figs.32-35].
Female (from Yellow and Bai Rivers estuarie): urosome (dorsal); 33, P5.
P5 uniramous, asymmetrical. Caudal rami asymmetruical, the right one being bigger than the left.

Male: 34, habitus (dorsal); 35, P5.
Caudal rami almost symmetrical.
Distal segment of left leg with 3 finger-like processes and is hairy at the distal portion of its inner border.


Species Labidocera euchaeta - Plate 4 of morphological figuresissued from : E.G. Silas & P.P. Pillai in J. mar. biol. Ass. India, 1973 (1976), 15 (2). [p.799, Fig.11, c-d].
Female (frommouth of Rangoon River): c, urosome (dorsal); d, P5.
Nota: Anterior margin of cephalon imperfectly rounded. Dorsal eye lenses small and placed apart. Cephalic hooks absent. Urosome 2-segmented, segments more or less of equal size. Caudal rami asymmetrical, right ramus broader, 2nd caudal seta much longer than others. A1 23-segmented. P5 symmetrical.
Scale as in Calanopia minor.


Species Labidocera euchaeta - Plate 5 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.41, Fig.7]. As Labidocera euchäta.
Female: 7, habitus (dorsal).


Species Labidocera euchaeta - Plate 6 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.41, Fig.36]. As Labidocera euchäta.
Female: 36, urosome (ventral).


Species Labidocera euchaeta - Plate 7 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.23, Fig.31]. As Labidocera euchäta.
Female: 31, P5 (posterior view). Ri = endopod.


Species Labidocera euchaeta - Plate 8 of morphological figuresissued from : T. Mori in The pelagic Copepoda from the neighbouring waters of Japan, 1937 (2nd edit., 1964). [Pl.42, Figs.11-13].
Female: 11, A2; 12, P5; 13, habitus (dorsal).


Species Labidocera euchaeta - Plate 9 of morphological figuresissued from : Nyan Taw in Austr. J. mar. Freshwat. Res., 1974, 25. [p.270, Table 1].
Male: Characteristics.


Species Labidocera euchaeta - Plate 10 of morphological figuresissued from : N.G. Das & S. Das in Chittagong Univ. St., 1980, II, 4. [p.46, Figs.7-12].
Female (from Karnafully River estuary): 7, habitus (dorso-lateral); 8, A1; 9, P5.

Male: 10, corners of the last thoracic segment and urosome; 11, right A1; 12, P5.

Nota: The morphological charaters coincide with those descibed by Sewell (1912) except that a long seta which is found on the 2nd segment of the exopod of P5 female of Sewell's paper is absent in specimens of Karnafully River estuary.

Compl. Ref.:
Sewell, 1948 (p.324); Chiba & al., 1957 a (p.11); Ganapati & Shanthakumari, 1962 (p.9, 15); Chen Q-c, 1980 (p.794); Sarkar & al., 1986 (p.178); Madhupratap & Haridas, 1986 (p.105, tab.1); Gao & Li, 1988 (p.684, feeding rhythm); 1989 (p.299, size, weight); Hernandez-Trujillo, 1989 (tab.1); Cervantes-Duarte & Hernandez-Trujillo, 1989 (tab.3); Lin & Li, 1989 (p.203, egg production); Yoo, 1991 (tab.1); Dai & al., 1991 (p.45, tab.1); Hwang & Choi, 1993 (tab.3); Hernandez-Trujillo, 1994 (tab.1); Myung & al., 1994 (tab.1); Shih & Young, 1995 (p.71); Yang, 1997 (p.299); Park & Choi, 1997 (Appendix); Hsieh & Chiu, 1998 (tab.2); Suarez-Morales & Gasca, 1998 a (p.110); Wong & al, 1998 (tab.2); Mauchline, 1998 (tab.8); Dolganova & al., 1999 (p.13, tab.1); Rezai & al., 2004 (p.489, tab.2, Rem.); Chang & Fang, 2004 (p.456, tab.1); Wang & Zuo, 2004 (p.1, Table 2, dominance, origin); Lan & al., 2004 (p.332, tab.1); Yin & al., 2004 (p.3); Choi & al., 2005 (p.710: Tab.III); Zuo & al., 2006 (p.163: tab.1); Hwang & al., 2006 (p.943, tabl. I); Lavaniegos & Jiménez-Pérez, 2006 (p.146, tab.2, 4, Rem.); Dur & al., 2007 (p.197, Table IV); Wang M.-h & al., 2007 (p.679, trophic transfer); Tseng L.-C. & al., 2008 (p.46, table 2, abundance vs moonsons, fig.8, table 3: indicator species); Ohtsuka & al., 2008 (p.115, Table 5); Lan & al., 2009 (p.1, Table 2); Jiang Z.-B. & al., 2009 (p.196, Table 1, 2); Hwang & al., 2009 (p.49, fig.4, 5); Zhang G.-T. & al., 2010 (p.492, Table 1, 2); Sun & al., 2010 (p.1006, Table 2); W.-B. Chang & al., 2010 (p.735, Table 2, abundance); Zhaoli & al., 2011 (p.84, abundance %); Gao X. & al., 2011 (p.591, p.597: occurrence); Zengling MA & al., 96, mortality rate, respiration vs Chlorine concentration); DiBacco & al., 2012 (p.483, Table S1, ballast water transport); Johan & al., 2012 (p.647, Table 1, fig.2, salinity range); Huo & al., 2012 (p.1, Table 1: dominance); Lee D.B. & al., 2012 (p.88, co-occurrence); Moon & al., 2012 (p.1, Table 1); Seo & al., 2013 (p.448, Table 1, occurrence)
NZ: 5

Distribution map of Labidocera euchaeta by geographical zones
Species Labidocera euchaeta - Distribution map 2issued from : S. Lin & S. Li in J. Xiamen Unv. (Nat. Sc.), 1989, 28 (2). [p.205, Fig.4]. Seasonal fluctuation in the average rate egg production of the population (F) based on which 10 generations a year (G1-G10) are proposed.

Nota: The reproductive rate was investigated between April 1986 and August 1987 in Xiamen Harbor (24°26'N, 118°10'E).
Results show that at a constant temperature (20°C), specific rate of egg production is positively correlated with food (Artemia nauplius) density, with a gross efficiency of egg production of ca. 62% in carbon which was independent of food density nand ingestion rate. The percentage of egg-lying females fluctuated seasonally similarly to in situ rate of egg production., but maintened quite high levels all year round, suggesting that this species in Xiamen reproduces continuously, with summer as high reproductive season and winter a low one.
Ten gegnerations a year are suggested based only on the number of the peaks of average population egg production rate.
Species Labidocera euchaeta - Distribution map 3issued from : S. Lin & S. Li in J. Xiamen Unv. (Nat. Sc.), 1988, 27 (6). [p.691, Table 1, Fig.4].
At sufficient food supply, specific rate of egg production, unrelated to the body length of adults females, between April 1986 and August 1987 at Xiamen Harbor, has a positive correlation (r) with temperature, with seasonal variations occurring in the correlation pattern.
The correlation is observed between rate of egg production (F) and temperature as well as body weight of adults females.
Total egg production is also positively correlated with body size and more completexy with temperature.
Hatching rate of eggs, in independent of temperature within the normal temperature range, maintainely high levels all year round.
Species Labidocera euchaeta - Distribution map 4Issued from : Zengling MA, Hongping LIN, Xiaolian GU & Zhaoli XU in Acta Oceanol. Sin., 2011, 30 (2). [p.98, Figs.1, 2].
Fig.1: Effects of different conce,tration residual chlorine on the mortality of L. eucharta (from Xiamen Bay: 24°26.778' N, 118°02.363' E; in September 2009).

Fig.2: mortality of L. euchaeta treated for 24 h with different residual chlorine concentration.

The means and standard errors were based on triplicate incubations in all experiments.

Nota: The mortality increased with enhanced chlorine concentration and prolonged exposure time. Furthermore, the mortality increased faster at the beginning, reached the maximal value in 8 h and leveled off from then on.
Species Labidocera euchaeta - Distribution map 5Issued from : Zengling MA, Hongping LIN, Xiaolian GU & Zhaoli XU in Acta Oceanol. Sin., 2011, 30 (2). [p.99, Figs.3, 4, 5].
Fig.3: Changes in Chlorella sp. cell concentration due to grazing of L. euchaeta with residual chlorine concentration at 0 and at 0.2 mg per L.
The means and standard errors were based triplicate incubations.

Fig.4: Effects of 0.2 mg per L residual chlorine on filtering and grazing rates of L. euchaeta.
The means and standard errors were based on triplicate incubations. The symbol ** indicates significant (p<0.01) difference between the treatments.

Fig.5: Effects of residual chlorine on respiration of L. euchaeta.
The means and standard errors were based on triplicate incubations. The symbol ** indicates significant (p<0.05) difference between treatments.
Loc:
Indian (N & SE), India (Lawson's Bay, Karnafully River estuary, Hooghly estuary), Bay of Bengal, Rangoon River estuary, Perai Ricer estuary (Penang), Straits of Malacca, Indonesia-Malaysia, Philippines, Hainan (Sanya Bay), Hong Kong, Amoy, Xiamen Harbour, Taiwan Strait, Taiwan (S, SW, W, Kaohsiung Harbor, NW, off Danshuei River, N), China Seas (Bohai Sea, Yellow Sea, East China Sea, Changjiang River estuary, Xiamen Bay, South China Sea), S & W Korea, Muan Bay, Asan Bay, Japan Sea, Japan, W Baja California, G. of California
N: 80
Lg.:
(44) F: 2,4-1,8; (46) F: 2,1-2; (81) M: 1,88; (91) F: 2,4-2; (256) F: 2,31; (290) F: 2,5-2,85; M: 2,25-2,45; (351) F: 1,96-2,18; M: 1,67-1,77; (1113)* F: 4,05; M: 3,76; {F: 1,80-2,85; M: 1,67-2,45}
*: The body lengths measured by Das & Das (1980) appear much more high tha the other authors.
Rem.: Neritic.
Most of the locality records in C.B. Wilson (1950, p.244) are not retained.
Observed in ballasts of ships in San Francisco.
Last update : 17/05/2016
    to add your remark
  

 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2017. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en 
[Accessed January 18, 2018]

© copyright 2005-2017 CNRS, UPMC

Webmaster
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
UPMC - Paris Universitas

 

Version française
English version

 

Search

On the WEB of CNRS

 


Marine Planktonic Copepods

Marine Planktonic Copepods

 

Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins