First Record of the Calanoid Copepod Pseudodiaptomus serricaudatus (Scott, T. 1894), (Copepoda: Calanoida: Pseudodiaptomidae) in the Equatorial Indian Ocean (original) (raw)
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Biogeography of pelagic calanoid copepods in the Western Indian Ocean
Deep Sea Research Part II: Topical Studies in Oceanography, 2020
Published information from the Western Indian Ocean (WIO) and new data from the South West Indian Ocean Ridge, are consolidated and combined to generate an updated biogeography of calanoid copepods. The WIO was divided into 75 5 � grid squares, and a similarity matrix between grids was generated on the basis of presence: absence data for more than 172 species. Distinct assemblages are identified that correspond to the 1) coastal waters of Somalia, Kenya, Tanzania and northern Mozambique, 2) coastal and offshore waters of southern Mozambique and NE South Africa, 3) coastal and offshore waters of South Africa, 4) waters of the central WIO. The patterns observed are in agreement with surface circulation patterns in the region, and the influence of gyres and eddies on the distribution of some taxa is hypothesised. The coarse and qualitative nature of the data prevents us from identifying transitional faunas, as well as those associated with mesoscale features.
Pseudodiaptomus Annandalei (Copepoda: Pseudodiaptomidae) from Coastal Waters of Sri Lanka
2007
The demersal copepod, Pseudodiaptomus annandalei Sewell, 1919 is reported for the first time from the plankton samples collected from coastal waters of southern Sri Lanka during August 2004 to January 2005. These new data together with existing data on distribution of the P. annandalei indicate that it has the largest geographical ranges for Indo-Pacific pseudodiaptomids.
Aquatic Invasions, 2012
The presence of the demersal Asian copepod Pseudodiaptomus marinus is reported for the first time in the southern bight of the North Sea, in both Calais harbour and the coastal waters off Gravelines, France. This is the first record of P. marinus in the Atlantic Ocean sector and the North Sea area. The species was . The very low number of collected individuals (0.2 to 4.0 ind.m -3 ) and the capture of only two ovigerous females and of a few numbers of copepodid CV stages suggest that the species survives and actually reproduces in both sites but does not manage to develop an abundant population. The presence of P. marinus in Calais harbour and coastal waters of the southern North Sea supports recent observations of other Asian species in the same area and suggests a passive transport via ship's ballast waters.
Copepod Abundance and Diversity from Offshore Region of Tuticorin, South East Coast of India
International Journal of Current Microbiology and Applied Sciences
A detailed study had been carried out on species abundance, biomass and composition of copepod in four different offshore stations namely, Station I: Vembar, II: Keelavaipar, III: Punnaikayal and IV: Thiruchendhur in Gulf of Mannar region from October 2011 to April 2012. A total of 56 copepod species belongs to 20 families under 4 orders have been encountered during the period. The percentage composition of different groups of copepod species was composed of Calanoida (35 numbers) 62.5%, Cyclopoida (4 numbers) 7.14%, Harpacticoida (8 numbers) 14.3% and Poecilostomatoida (9 numbers) 16.1%. The percentage of biomass composition of different groups of copepods during the study was in the order of Calanoida 38.99%, Harpacticoida 32.56%, Cyclopoida 15.22% and Poecilostomatoida 13.23%. In the case of species composition, Euterpina acutifrons (28.61%) was the most abundant species followed by Acrocalanus gracilis (17.68%), Corycaeus crassiusculus (12.33%), Oithona brevicornis (12.03%) and Temora turbinata (4.25%) were the other dominant species in observation. The copepod density in different stations were in the range of 8600-39900, 3900-64600, 3800-24800 and 5000-22500 numbers m-3 at station I, II, II and IV respectively. The lowest biomass of copepod was observed at station III and highest biomass was found at station II. The copepod species richness ranged from 0.48 to 2.72 and species diversity was in the range of 0.87 to 1.98 in the study areas. Species evenness was varied from 0.24-0.51 during the observation period.
Three new species of the demersal calanoid copepod Pseudocyclops from Phuket, Thailand
Plankton biology and ecology, 1999
Both sexes of three new species of the demersal calanoid copepods, Pseudocyclops ornaticauda, P. ensiger and P. minutus, are described from Phuket, Thailand. Pseudocyclops ornaticauda comprises a distinct species group with P. lepidotus from southern Japan, whereas P. ensiger is closely related to an Australian species, P. kulai. Pseudocyclops minutus is similar to P. crassiremis from Norway and P. bahamensis and P. oliverifrom the Bahamas, suggesting that these species may show a full Tethyan track. Taxonomic and zoogeographical notes are provided. A gut content analysis revealed that Pseudocyclops mainly fed on both pelagic and benthic microalgae.
Pseudechetus fimbriatus gen. et sp.nov., a caligid copepod from Kerala coastal waters
Parasitology, 1979
SUMMARYPseudechetus fimbriatus gen. et sp.nov. from the throat of a carangid is described. The new genus has the closest resemblance to Parechetus Pillai from which it differs in the presence of 4 processes instead of 2 on the genital segment and a pair of processes on the abdomen instead of wings. The sternal fork carries accessory tines anteriorly making it a double structure.
Abstract: Lakshadweep Archipelago Is A Group Of Coral Islands On The West Coast Of The Arabian Sea. It Is One Among The Unique Coral Atolls In India That Are Well Known For Several Species Of Fishes And Other Biotic Resources. Seasonal Variation In Mesozooplankton, Particularly Of Copepod Abundance And Distribution In The Inner And Outer Lagoon Of Kavaratti Atoll Were Studied During April 2013 (Premonsoon), September 2013 (Monsoon) And January 2014 (Postmonsoon). Copepods Were The Most Dominant Taxa In All The Stations And Seasons, That Accounted 44.15 To 85.97% Of The Total Mesozooplankton Abundance. Ostracoda (Premonsoon), Crustacean Larvae (Monsoon) And Chaetognaths (Postmonsoon) Formed The Second Abundant Group. Mesozooplankton Community In The Study Area Exhibits Temporal Variation Corresponding To The Variation In Abiotic Parameters Therefore Can Be Used As Potential Indicators Of Water Quality. Calanoid Copepods Formed The Dominant Taxa During Monsoon And Postmonsoon, While Cyclopoid Copepods Dominated During Premonsoon. Within The Copepods, Species Of The Family Candacidae, Calanidae, Pontellidae, Temoridae, Psuedodiaptomidae, Centropagidae And Oithonidae Were Predominant. Among The Identified Species Ten Calanoids Were Not So Far Recorded From Kavaratti Atoll, In Lakshadweep. Keywords: Calanoids, Copepods, Coral Atoll, Kavaratti, Mesozooplankton