Production of Acartia steueri (Copepoda: Calanoida) in Ilkwang Bay, Southeastern Coast of Korea

Kang, Hyung-Ku; Kang, Yong Joo

doi:10.1007/s10872-005-0043-1

Cited by 15 publications

(8 citation statements)

References 14 publications

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“…This seasonal cycle is consistent with the cycle in Onagawa Bay, located in northern Japan (Uye 1983). In temperate waters, A. steueri is most abundant during May to June in Sagami Bay, central Japan (Onoue et al 2006) and June to July in Ilkwang Bay, on the southeastern coast of Korea (Kang & Kang 2005). In the above waters the temperature at which A. steueri is most abundant is approximately 20°C.…”

Section: Feeding Habitssupporting

confidence: 80%

“…No information is available on the feeding behaviors of A. steueri on microplankton assemblages in temperate waters, however, abundances of this copepod were the highest when chlorophyll a concentration in the water column peaked in Sagami Bay (Onoue et al 2006) and Ilkwang Bay (Kang & Kang 2005). High chlorophyll a concentrations in these areas is due to an increase in diatoms (Onoue et al 2006, Kang & Kang 2005, and diatoms are considered the main diet of the species in these areas.…”

Section: Feeding Habitsmentioning

confidence: 99%

“…Jung et al (2004) showed that the EPR of this species in Ilkwang Bay, on the southeastern coast of Korea, is positively correlated with the chlorophyll a concentration in the field. Because high chlorophyll a levels are owing to diatom growth (Kang & Kang 2005), high EPR of this copepod is associated with active feeding on diatoms. Additionally, Onoue et al (2006) reported that peak periods of chlorophyll a concentration and EPR of A. steueri are almost coincidental in Sagami Bay.…”

Section: Egg Productionmentioning

confidence: 99%

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Feeding and reproduction including diapausing egg production as cold-water adaptations for overwintering of <i>Acartia steueri</i> (Copepoda, Calanoida) in Okkirai Bay, Sanriku, northern Japan

Yamada

Sato

Kobiyama

et al. 2020

Plankton Benthos Res

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Feeding experiments with a natural microplankton assemblage and egg production experiments with the neritic copepod Acartia steueri were conducted simultaneously in an inlet on the Sanriku coast during autumn. Diapausing egg production status of A. steueri was also investigated. Further, A. steueri dominated during September to October and then gradually decreased until December, before disappearing after January. The dominant microplankton in natural waters during the study period were dinoflagellates, followed by centric and pennate diatoms and oligotrich ciliates. A. steueri fed only on dinoflagellates and oligotrich ciliates at rates of 87.0-309 and 17.7-71.5 cells ind −1 d −1 , respectively. Egg production rate of A. steueri ranged from 1.6 to 15.0 eggs female −1 d −1 and significantly increased as ingestion rates of dinoflagellates and oligotrich ciliates increased. The copepod began producing diapausing eggs in October, and by late December, 86% of the eggs produced were diapausing. The population s egg production rate was highest in September (18,961 eggs m −3 d −1 ) and gradually decreased through the end of December. These dietary and diapausing egg production seasons of A. steueri in the Sanriku area are significantly different from the results of previous studies in the temperate zone, where the copepod mainly fed on diatoms and produced diapausing eggs during spring. A. steueri can alter its feeding habits and the timing of diapausing egg production in response to changes in habitat. The flexibility of this species to environmental change has likely allowed expansion of its geographical distribution.

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Section: Feeding Habitssupporting

confidence: 80%

Section: Feeding Habitsmentioning

confidence: 99%

Section: Egg Productionmentioning

confidence: 99%

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Feeding and reproduction including diapausing egg production as cold-water adaptations for overwintering of <i>Acartia steueri</i> (Copepoda, Calanoida) in Okkirai Bay, Sanriku, northern Japan

Yamada

Sato

Kobiyama

et al. 2020

Plankton Benthos Res

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show abstract

“…Kang & Kang (2005) and Onoue et al (2006) reported that A. steueri was most abundant at around 20°C from July to August in Ilkwang Bay on the southeastern coast of Korea and from May to June in Sagami Bay, central Japan, respectively. This suggests that 20°C is the optimum temperature for their growth and reproduction.…”

Section: Discussionmentioning

confidence: 95%

Seasonal succession of four Acartia copepods (Copepoda, Calanoida) in Okkirai Bay, Sanriku, northern Japan

Yamada

Kobiyama

Ogata

2012

Plankton Benthos Res

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Seasonal changes in abundance of four neritic Acartia species (A. hudsonica, A. omorii, A. longiremis and A. steueri), including identifiable copepodid stages, were investigated in the inner reaches of Okkirai Bay, Sanriku, northern Japan, to elucidate their seasonal succession patterns. Samples were collected monthly at intervals from August 2007 to July 2009 by vertical hauls of a NORPAC net of 100 μm mesh aperture. For identification of morphologically allied A. omorii and A. hudsonica, the dimensional differences between them were statistically analyzed for the stages of C4 to C6. The dominant species were A. longiremis in the colder season and A. steueri in the warmer season. A. longiremis and A. omorii appeared from early spring (February or March) to summer with numerical peaks in April. These April peaks were considered to result from immigration from outside the bay with intrusions of Oyashio Current water. A. steueri increased during the summer with a peak in September, then decreased until December or January, and disappeared for two or three months from April, when they were probably only present as diapausing eggs. A. hudsonica occurred from early spring to mid-summer as in A. omorii but with higher abundances in summer than in spring, though the seasonal abundances varied somewhat between years. These results suggest that temperature, determining reproductive activity (and production of diapausing eggs in A. steueri), and intrusions of Oyashio water are important environmental factors determining seasonal succession of acartiid copepods in the bay.

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“…egg hatching success) have been examined in terms of the growth rate of adult females, recruitment, secondary production, and response to environmental changes; including temperature, water column stability, and food availability (Poulet et al 1995;Gómez-Gutiérrez and Peterson 1999;Kimmerer et al 2005). Temperature has been frequently reported as an important factor in growth and development (McLaran 1981(McLaran , 1995Uye 1988;Huntley and Lopez 1992) and variation in body length (Liang and Uye 1996;Kang and Kang 2005) of marine copepods. Although the reproduction of copepods is influenced by a number of factors, principal among these are considered to be food biomass and availability (Mullin 1991;Mauchline 1998).…”

Section: Introductionmentioning

confidence: 99%

Egg production rate of the copepod Calanus sinicus off the Korean coast of the Yellow Sea during spring

Kang¹,

Lee

Choi³

2011

Ocean Sci. J.

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The egg production rate (EPR) of Calanus sinicus was measured from March 2007 to April 2010 at three stations along the Korean coast of the Yellow Sea (in coastal waters off Saemangum, Yeongheungdo, and Asan Bay) to estimate in situ maximum egg production rate (MEPR) and to understand whether the females were limited in their growth or fecundity in the field. The mean EPR of C. sinicus at each sampling date ranged from 10.3-34.9 eggs female -1 d -1 (mean 23.4 eggs female -1 d -1 ), and the EPR of individual copepods ranged from 0-81 eggs female -1 d -1 . The mean EPR was positively correlated with the body weight of female copepods. The MEPR at each sampling date ranged from 40-81 eggs female -1 d -1 (mean 50.4 eggs female -1 d -1 ). Over 84% of eggs spawned hatched successfully. The weight-specific growth rate (WSGR) ranged from 0.038-0.111 d -1 (mean 0.082 d -1 ), indicating that 3.8-11.1% of the carbon in an adult female was produced daily as female growth. The WSGR was negatively correlated with water temperature. The ratio of mean EPR to observed mean MEPR ranged from 20-70% (mean 46%), indicating that 54% of a female's growth might be limited in the field. We suggest that the ratio of observed EPR to mean MEPR of copepod can be applied to understand how the copepod responds to environmental changes, as well as EPR and hatching success.

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Production of Acartia steueri (Copepoda: Calanoida) in Ilkwang Bay, Southeastern Coast of Korea

Cited by 15 publications

References 14 publications

Feeding and reproduction including diapausing egg production as cold-water adaptations for overwintering of <i>Acartia steueri</i> (Copepoda, Calanoida) in Okkirai Bay, Sanriku, northern Japan

Feeding and reproduction including diapausing egg production as cold-water adaptations for overwintering of <i>Acartia steueri</i> (Copepoda, Calanoida) in Okkirai Bay, Sanriku, northern Japan

Seasonal succession of four Acartia copepods (Copepoda, Calanoida) in Okkirai Bay, Sanriku, northern Japan

Egg production rate of the copepod Calanus sinicus off the Korean coast of the Yellow Sea during spring

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