Seasonal variations in biomass, growth rate and production rate of the small cyclopoid copepod Oithona davisae in a temperate eutrophic inlet

Uye, Shin-ichi; Sano, Kazuhiro

doi:10.3354/meps163037

Cited by 70 publications

(10 citation statements)

References 21 publications

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“…The intermediate volume used in these experiments provided sufficient space for the copepods to move around at the lowest density (i.e., 40 ind l -1 ). However, density in the field varies with the seasons (Uye & Kano, 1998;David et al, 2005) as does the behavior of copepods (Moison, 2009). The observed behavior should only be associated with the field behavior of an individual at a given time.…”

Section: Improvement Of Experimental Designmentioning

confidence: 98%

Effects of animal density, volume, and the use of 2D/3D recording on behavioral studies of copepods

et al. 2011

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Studies on the behavior of copepods require both an appropriate experimental design and the means to perform objectively verifiable numerical analysis. Despite the growing number of publications on copepod behavior, it has been difficult to compare these studies. In this study, we studied two species of copepods, Eurytemora affinis and Pseudodiaptomus annandalei, and employed recently developed scaling and non-scaling methodology to investigate the effects of density and volume on the swimming behavior of individual organisms in still water. We also compared the results of two-and three-dimensional projections of the swimming tracks. A combination of scale-dependent and scale-independent analysis was found to characterize a number of behavioral observations very effectively. We discovered that (i) density has no effect except to increase the time spent in the swimming state of ''breaking'', (ii) smaller volumes resulted in more complex trajectories, and larger volumes, like density, increased the time spent in the swimming state ''breaking'', and (iii) three-dimensional projections gave a more accurate estimation of speed and the time spent cruising. When only a vertical 2D projection was used, ''cruising'' could be confused with ''sinking''. These results indicate that both experimental conditions and the selection of 2D or 3D projection have important implications regarding the study of copepod behavior. The development of standardized procedures with which to compare the observations made in different studies is an issue of particular urgency.

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Section: Improvement Of Experimental Designmentioning

confidence: 98%

Effects of animal density, volume, and the use of 2D/3D recording on behavioral studies of copepods

et al. 2011

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“…Different species of the genus show different niche requirements. Oithonid abundance and community structure exhibit considerable variations at seasonal, interannual, and regional scales (Uye & Sano, 1995). Oithonid species show adaptability to temperate vs. tropical regions (Paffenhöfer, 1993;Uye & Sano, 1998;Paffenhöfer & Flagg, 2002;Turner, 2004) and oligotrophic vs. eutrophic waters (Uye, 1994;Uye & Sano, 1995).…”

Section: Introductionmentioning

confidence: 99%

Mesh size affects abundance estimates of Oithona spp. (Copepoda, Cyclopoida)

Hwang¹,

Kumar²,

Dahms‬³

et al. 2007

Crustac

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Retrieval by different mesh-sized plankton nets is compared, using the abundance and distribution patterns of cyclopoid copepods of the genus Oithona W. Baird, 1843 as a case study. Mesozooplankton was sampled during spring, summer, and autumn of 2000-2002 in the South China Sea. Plankton samples were collected by surface tows (5-0 m) and by oblique tows in three different depth layers (0-50 m, 0-100 m, and 0-150 m), with Norpac zooplankton nets of 333 and 100 µm mesh size. The oithonid density and diversity in the plankton samples collected through a 100 µm mesh was about one order of magnitude higher than those collected through a 333 µm mesh. The mean occurrence frequency of Oithona spp. in the plankton samples collected through a 100 µm mesh net was >85% and >60% through a 333 µm mesh net, with a mean total density of 45.86 ± 206.97 m −3 for the 100 µm mesh net compared to 2.28±21.94 m −3 for the 333 µm mesh net [which indicates the enormous patchiness in occurrence of these copepods]. The density of smaller mesozooplankton, as evidenced by Oithona spp., has thus been underestimated by previous researchers using larger meshed nets. Samples collected through a 100 µm mesh net demonstrated the numerical importance of the genus Oithona and its distinct seasonal and interannual patterns of abundance and distribution in the South China Sea. RÉSUMÉ L'abondance et la distribution du copépode cyclopoïde de genre Oithona W. Baird, 1843 ont été pris comme modèle pour comparer l'efficacité de filets à plancton avec différentes tailles de maille. Le mésoplancton a été collecté au cours des printemps, éte et automne des années 2000-2002 dans la mer de Chine Méridionale. Les échantillons de plancton ont été collectés par des traits de surface (5-0 m) et des traits obliques dans trois couches de différentes profondeurs (0-50 m, 0-100 m, 0-150 m), avec des filets à zooplancton Norpac de taille de maille de 333 et 100 µm. La densité et la diversité des Oithonidés collectés dans les échantillons grâce à une maille de 100 µm ont été un ordre de magnitude plus grande par rapport à ceux collectés avec une maille de 300 µm. Le fréquence

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“…They also stated that the osmoregulatory abilities of O. davisae might facilitate their successful adaptation to the brackish Black Sea. The species was found at salinities between 22.8-32.3‰ in Japanese coastal water (Hirota, 1990;Uye and Sano, 1998;Itoh et al, 2011) and at 12‰ salinity in San Francisco, California (Ferrari and Orsi, 1984). In the present study, O. davisae was found at salinities ranging from 7.6‰ (November)-18.02‰ (December).…”

Section: Morphology Of O Davisaementioning

confidence: 59%

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Üstün¹,

Kurt²

2016

Turk. J. Fish. Aquat. Sci.

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We report the first occurrence of Oithona davisae Ferrari F. D.&Orsi, 1984 in the Sinop coast, Turkey. Data on the abundance and biomass of this species, and the proportion of adult and copepodite stages in the total copepods were investigated. The zooplankton samples were collected monthly by vertical hauls with plankton net of 112 μm mesh size from January to December 2009. However, O. davisae was observed for the first time in September, and continued to be observed for the remainder of the sampling period. The highest abundance and biomass of this species were recorded in November 2009 (1485.35 ind.m -3 and 2.9 mg.m -3 , respectively), which was 39.89% in the abundance and 14.35% of the biomass of the total copepods in November. In conclusion, the non-indigenous copepod species, O. davisae, has adapted to the ecological conditions of the Sinop coast.

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Seasonal variations in biomass, growth rate and production rate of the small cyclopoid copepod Oithona davisae in a temperate eutrophic inlet

Cited by 70 publications

References 21 publications

Effects of animal density, volume, and the use of 2D/3D recording on behavioral studies of copepods

Effects of animal density, volume, and the use of 2D/3D recording on behavioral studies of copepods

Mesh size affects abundance estimates of Oithona spp. (Copepoda, Cyclopoida)

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