Bathypelagic Calanoid Copepods of the Western Indian Ocean

Grice, George D.; Hulsemann, Kuni

doi:10.5479/si.00963801.122-3583.1

Cited by 61 publications

(32 citation statements)

References 2 publications

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“…The majority is represented by widely distributed and bipolar meso-and bathypelagic species. The deep-water species until recently were generally believed to be largely cosmopolitans because of the lack of major gradients in the deep sea (Grice and Hulseman 1967). While some bathypelagic organisms inhabiting deep water of the Arctic Ocean apparently have extensive distributional ranges, molecular genetic studies may, however, find that not all of these species are monotypic (Ward and Shreeve 2001).…”

Section: Discussionmentioning

confidence: 98%

Patterns of zooplankton diversity through the depths of the Arctic’s central basins

2010

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Metazoan zooplankton diversity is characterized for the oceanic environments of the Arctic Ocean, specifically the deep Nansen, Amundsen, Makarov and Canada Basins. Our species inventory is based on original records from 134 locations where stratified sampling of the entire water column was conducted from the surface to the bottom (or a maximum of 3,000 m) during seven icebreaker expeditions (RV Polarstern, 1993, USCGC Healy, 2005 and two older expeditions of the Russian drifting ice stations North Pole 22 and 23 . Representatives of eight large metazoan taxa, including Cnidaria, Ctenophora, Mollusca, Annelida, Nemertea, Crustacea, Chaetognatha, and Larvacea, all predominately oceanic species, are registered, with a total of 174 species. Crustaceans strongly dominate in terms of the species number (70%), and copepods are the most diverse group amongst them. Comparison with the historical data suggests that the composition of epi-and mesopelagic zooplankton is relatively well characterized to date, while a considerable number of species we encountered in the bathypelagic layers were either unrecorded before, or undescribed. There appears to be no zoogeographical barrier between the Eurasian and Canadian basins throughout the entire depth range. All deep-water and endemic species are found on both sides of the Lomonosov Ridge, suggesting effective exchange of the deep fauna across the ridge. Notable differences in the species composition in the upper and midwater layers are related to the occurrence of Atlantic and Pacific expatriates advected with their respective waters either into the Eastern or Western Arctic. A pronounced increase in Pielou's evenness (J'), Shannon's diversity (H'), and Margalef's species richness (d) indices with depth, with a maximum occurring within the Atlantic layer, followed by a decrease in the deeper layers, was typical for all deep basins. Species-specific depth preferences and ranges result in statistically distinct communities at different depths with high within-depth similarity (60-80%). Differences were detectable between cruises in the epi-and mesopelagic layers (driven by the expatriates), but less so in the bathypelagic zone.

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Section: Discussionmentioning

confidence: 98%

Patterns of zooplankton diversity through the depths of the Arctic’s central basins

2010

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“…The genus Tharybis contains the following species: T. altera (Grice & Hulsemann, 1970); T. angularis Schulz in: Schulz & Beckmann, 1995;T. asymmetrica Andronov, 1976;T.…”

Section: M00033 Received 22 June 2000; Accepted 15 November 2000mentioning

confidence: 99%

“…asymmetrica Andronov, 1976;T. compacta (Grice & Hulsemann, 1970); T. crenata Schulz in: Schulz & Beckmann, 1995;T. fultoni Park, 1967; groenlandicus (Tupitzkii, 1982) (see Schulz & Beckmann 1995); T. macrophthalma Sars, 1902; T. magna Bradford & Wells, 1983 (see also Ohtsuka et al 1998); T. megalodactyla Andronov, 1976;T.…”

Section: M00033 Received 22 June 2000; Accepted 15 November 2000mentioning

confidence: 99%

A new species of benthopelagic copepod of the genusTharybis(Calanoida: Tharybidae) from the upper slope, north‐eastern New Zealand

Bradford‐Grieve

2001

New Zealand Journal of Marine and Freshwater Research

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A new species of benthopelagic calanoid Copepoda is described from off North Cape, New Zealand. The species, Tharybis inaequalis n. sp. (Family: Tharybidae), is the first record of this genus from New Zealand. T. inaequalis females are distinguished from all other described Tharybis by the asymmetrical fifth legs (long and thin on the left and short and squat on the right) with a pair of subequal outer terminal spines and an inner articulated terminal spine that is about 1.5 times the length of the outer spines. Males are most like those of T. compacta and T. minor but the inner lobe on right leg 5 segment 3 is small and rounded and entirely directed into the midline; the left leg 5 exopod segment 3 also has several distal lamellae and in inner proximal spine. As in T. minor, male antennule segments XXII and XXIII are separate on the left and fused on the right.

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“…The distribution of the female has been reported from Irish water (FARRAN, 1908), the northeastern Atlantic (SARS, 1925), the Izu region (TAN AKA, 195 7), and the western Indian Ocean (GRICE and HuLSEMANN, 1967). The species usually occurs in the water deeper than 1000 m in the Izu region.…”

Section: Pseudochirella Sars 1920mentioning

confidence: 99%

Additional Report on Calanoid Copepods From the Izu Region Part 2. Euchirella and Pseudochirella

Tanaka¹,

Ōmori²

1969

Publ. SMBL

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Bathypelagic Calanoid Copepods of the Western Indian Ocean

Abstract: he plankton and midwater trawl samples on which this paper is based were obtained during two cruises of R. V. Anton Bruun in 1963 and 1964, which, at that time, was participating in the Biological

Cited by 61 publications

References 2 publications

Patterns of zooplankton diversity through the depths of the Arctic’s central basins

Patterns of zooplankton diversity through the depths of the Arctic’s central basins

A new species of benthopelagic copepod of the genusTharybis(Calanoida: Tharybidae) from the upper slope, north‐eastern New Zealand

Additional Report on Calanoid Copepods From the Izu Region Part 2. Euchirella and Pseudochirella

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