Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Clausocalanidae ( Family )
            Pseudocalanus ( Genus )
Pseudocalanus newmani  Frost, 1989   (F,M)
Syn.: Pseudocalanus minutus Mori,1937 (1964) (p.36, Pl.15: figs.F,M: as elongatus);
P. elongatus Marukawa, 1908; ? Tanaka, 1956 c (p.384); Geletin, 1977 (p.82, figs.M);
Pseudocalanus sp. McLaren, 1965 (part.); Ohman, 1985 (p.15, resource supply); 1986 (p.673, impact of predators);
? P. minutus elongatus: Vaupel-Klein, 1970 (p.8)
Frost, 1989 (p.543, figs.F,M); Sévigny & al., 1989 (p.321 & suiv.: genetic); Chihara & Murano, 1997 (p.778, Pl.95: F,M); Bucklin & al., 1998 (p.97, Biomol.); Bucklin & al., 1999 (p.239, molecular systematic; Braga & al., 1999 (p.79, 84, tab.1, Rem.: Biol. mol.); Bucklin & al., 2003 (p.335, tab. 2, fig.3, Biomol.); G. Harding, 2004 (p.48, Rem.); Aarkke & al., 2011 (p.1487, Table III, fig.2, genetic analysis)
Species Pseudocalanus newmani - Plate 1 of morphological figuresissued from : Frost B.W. in Can. J. Zool., 1989, 67. [Fig.20,p.544].
Female: A, habitus (lateral view); B, anterior portion of cephalosome (lateral view from left side).

Male: C, habitus (lateral view); D, anterior portion of cephalosome (lateral view from right side).

All scale bars = 0.1 mm.

Species Pseudocalanus newmani - Plate 2 of morphological figuresissued from : T. Mori in The pelagic Copepoda from the neighbouring waters of Japan, 1937 (1964). [Pl.15, Figs.1-7]. As Pseudocalanus elongatus.
Female: 1, habitus (dorsal); 2, idem (lateral); 3, P2; 4, P3; 6, P4.

Male: 5,habitus (dorsal); 7, P5.

Compl. Ref.:
McLaren & al., 1989 (p.559, development vs. temperature); McLaren & al., 1989 (p.560, life history, annual production); Ohman, 1990 (p.257, figs.); Hirakawa & al., 1990 (tab.3); Tsuda & Nemoto, 1990 (p.83, diet vs. fecal pellet size); Shih & Marhue, 1991 (tab.2, 3); Frost & Bollens, 1992 (p.1137, vertical migration vs predator); Tsuda, 1994 (p.81, starvation tolerance); Aksnes & Ohman, 1996 (p.1461, mortality modelling): Ohman & Wood, 1996, p.126, mortality estimation); Yamaguchi & Shiga, 1997 (p.11); Mauchline, 1998 (tab.15, 24, 25, 45, 48, 58); Ban & al., 1998 (p.42, abundance vs. phytoplankton bloom); Tsuda & al., 1998 (p.1944, copepod gut content vs. predator); Dolganova & al., 1999 (p.13, tab.1); Logerwell & Ohman, 1999 (p.428, tab.1); Ban & al., 2000 (p.907); Yamaguchi & al., 2002 (p.1007, tab.1); Zuenko & Nadtochii, 2004 (p.526, tab.1, fig.8); Choi & al., 2005 (p.710: Tab.III); Manning & Bucklin, 2005 (p.233, Table 1, figs.5, 12, 13); Pierson & al., 2005 (p.349, vertical distribution vs Chl a concentration); Bragina, 2006 (pers. comm.); Liu & Hopcroft, 2008 (p.928: Table II); Takahashi & al., 2008 (p.222, Table 2, grazing impact); Ohtsuka & al., 2008 (p.115, Table 5); Galbraith, 2009 (pers. comm.); Chiba & al., 2009 (p.1846, Table 1, occurrence vs temperature change); Hopcroft & al., 2009 (p.9, Table 3); , Kosobokova & Hopcroft, 2010 (p.96, Table 1); Homma & Yamaguchi, 2010 (p.965, Table 2); Hopcroft & al., 2010 (p.27, Table 2); Ho^croft & Kosobokova, 2010 (p.49, figs.2, 3, 6, 7, 8, Table 1, 2, Rem.: egg production); Kosobokova & al., 2011 (p.29, Table 2, 3, Rem.: Canada Basin); Pomerleau & al., 2011 (p.1779, Table III); Homma & al., 2011 (p.29, Table 2, 3, 4, abundance, feeding pattern: suspension feeders); Matsuno & al., 2011 (p.1349, Table 1, abundance vs years); Matsuno & al., 2012 (Table 1, 2, fig.6); DiBacco & al., 2012 (p.483, Table S1, ballast water transport); Volkov, 2012 (p.474, Table 6, fig. 6, 11, abundance, distribution, interannual variation); Jang M.-C & al., 2012 (p.37, abundance and seasonal distribution); Gusmao & al., 2013 (p.279, Table 4, sex ratio); Questel & al., 2013 (p.23, Table 3, interannual abundance & biomass, 2008-2010)
NZ: 5

Distribution map of Pseudocalanus newmani by geographical zones
Species Pseudocalanus newmani - Distribution map 2issued from : B.W. Frost in Can. J. Zool., 1989, 67. [p.529, Fig.3].
Geographical distribution of Pseudocalanus spp.
Species Pseudocalanus newmani - Distribution map 3issued from : I.A. McLaren, M.J. Tremblay, C.J. Corkett & J.C. Roff in Can. J. Fish. Aquat. Sci., 1989, 46. [p.571, Fig.10].
Annual cycle of Pseudocalanus newmani on Emerald Bank (43°30'N, 63°00'W), 1979-80.
Successive generations labelled Go, etc. For convenience, Nov. 1979 sample placed at end (after 1980). Upper panel: abundances as proportions of stages (AD: adults; males clear section of adult bar). Lower panel: size-frequencies of adult females as proportions.
The samples were obtained by vertical hauls from near bottom (usually 25 m) by Hensen-type nets (one of 0.250 mm mesh and the other of 0.064 mm mesh).
Species Pseudocalanus newmani - Distribution map 4Issued from : H. Bi, K.A. Rose & M.C. Benfield in Mar. Ecol. Prog. Ser., 2011, 427. [p.157, Table 5].
Instantaneous mortality rates (individuals per day) from litterature.
Species Pseudocalanus newmani - Distribution map 5Issued from : D.L. Aksnes & M.D. Ohman inLimnol. Oceanogr., 1996, 41 (7).A vertical life table approach to zooplankton mortality. Example for Pseudocalanus newmani (from Dabob Bay, near Seattle, USA).
Species Pseudocalanus newmani - Distribution map 6Issued from : D.L. Aksnes & M.D. Ohman inLimnol. Oceanogr., 1996, 41 (7). [p.1468, Fig.4]. Comparisons of mortality estimates (per day) for Pseudocalanus newmani (from Dabob Bay) obtained by the vertical and horizontal approaches.

Nota: Mortality is commonly estimated from time series of abundances of the different stages of the species (horizontal live table approach) with the assumption that transport processes are of minor influence. The equations appropriate for analysis of stage distributions in samples at a single time (vertical life table approach) that, in certain circonstances, facilitate mortality estimation without requiring time series abundances. A primary assumption is that dayly recruitment to a particular stage should not be characterized by a strong upward or downward trend.
After comparisons of the two approaches, the conclusion is that the vertical approach may provide mortality estimates under conditions in which horizontal techniques are inappropriate. In contrast to estimates obtained with horizontal techniques, vertical estimates represent snapshot of the population.
Delaware, Massachusetts Bay, G. of Maine, Georges Bank, Nova Scotia, Newfoundland, Hudson Bay , Arct. (Beaufort Sea, Chukchi Sea, off NW Alaska, Canada Basin), Bering Sea, S Aleutian Basin, S Aleutian Is., Japan Sea, Korea Strait, Japan, Otsuchi Bay, Oyashio region, SW Hokkaido, Funka Bay, Station Knot, Aleutian Basin, ? Station “P” (in Vaupel-Klein, 1970), Washington (Dabob Bay, Friday Harbor), British Columbia
N: 50
(122) F: 1,53-0,94; M: 1,17-0,84; ? (205) F: 1,3-1; {F: 0,94-1,53; M: 0,84-1,17}
Rem.: Characteristics according to Frost (1989): See limits of lenght measurements in the figure of the genus Pseudocalanus
Female: Frontal part in lateral view rounded; mediodorsal surface of U1-U3 without sensillum; mediodorsal surface of U1 and U3 without integumental pore; ratio lenghts Prosome:Urosome = 2.18 (1.97-2.32)
Male: ratio of lenghts B1:B2 of P4 < 1.5; ratio of lenghts of segments of A1 (8-12):(20-21) <2.0; mediodorsal surfaces of U2-U4 without sensillum; ratio of lenghts Cephalosome:U2 = 5,45 (4,93-6,33)
U: urosome with furca included.
For Kosobokova & Hopcroft (2010) this species is a Pacific expatriate.
Last update : 17/09/2018
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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2018. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Sorbonne Université, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed October 19, 2018]

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