Life History and Reproduction of Jassa Slatteryi (Amphipoda, Ischyroceridae) on a Seagrass Bed (Zostera Marina L.) in Southern Korea

Jeong, Seh-Woong; Yu, Ok Hwan; Suh, Hae‐Lip

doi:10.1651/s-2739.1

Cited by 18 publications

(17 citation statements)

References 22 publications

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“…The Langebaan, False Bay and Knysna specimens were collected in 1950-1952, and the Mossel Bay material was collected in 1956 (K. Conlan, personal communication, February 2009). North Pacific habitats include fouling communities (Conlan 1990) and estuaries (Jeong et al 2007), from where this species may have been transported by ships (fouling and ballast water). Downloaded by [Fondren Library, Rice University ] at 10:55 26 September 2012…”

Section: Jassa Morinoimentioning

confidence: 99%

Introduced and cryptogenic marine and estuarine species of South Africa

Mead

Carlton

Griffiths

et al. 2011

Journal of Natural History

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Section: Jassa Morinoimentioning

confidence: 99%

Introduced and cryptogenic marine and estuarine species of South Africa

Mead

Carlton

Griffiths

et al. 2011

Journal of Natural History

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“…Thus, the large brood size in spring breeding can enhance the survival rate from fish predation and may contribute to rebuilding the population. In the seagrass bed, the winter period must be a critical period because spawning ceases and mortality is high (Jeong et al, 2007). However, the growth of the overwintering population during the winter period results in production of a large brood size in the next generation.…”

Section: Reproductive Outputmentioning

confidence: 99%

“…The high expense of energy on reproduction occurs at times when the environmental conditions for breeding are optimal (Sheader, 1983). In seagrass beds, the amount of energy for reproduction of amphipods was dependent on environmental conditions including temperature, seagrass growth, and food availability, and these factors could potentially drive variation in reproductive output (Fredette & Diaz, 1990;Yu et al, 2002;Jeong et al, 2007). It is likely that the difference in the amount of reproductive energy between the two breeding periods may be attributed to the intrinsic reproductive strategy of amphipods including G. japonicus.…”

Section: Reproductive Outputmentioning

confidence: 99%

Reproductive patterns and secondary production of Gammaropsis japonicus (Crustacea, Amphipoda) on the seagrass Zostera marina of Korea

Jeong

Suh

2008

Hydrobiologia

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Seagrass beds are diverse and productive components of coastal ecosystems. Amphipods often comprise a major component of their invertebrate fauna and may be among the most important secondary producers. The life history and production of the amphipod Gammaropsis japonicus were investigated monthly for 1 year on a seagrass bed (Zostera marina L.) in Gwangyang Bay, southern Korea. Population density of G. japonicus was closely correlated with seagrass standing crop (P \ 0.05), suggesting that there is a biological interaction between these two groups. The life-history pattern was annual and iteroparous with two principal periods of juvenile recruitment during the year; in spring (May to July) and fall (November to December). The mean body length of adults including ovigerous females was larger in the spring breeding period than in the fall and overall sex ratio was female-biased. The brood size and egg volume were positively related to body length of ovigerous females. At any given female size, egg volume was significantly larger in the fall breeding than in the spring, whereas brood size in the spring breeding was significantly larger than that in the fall. The brood volume of females between the two breeding periods was much greater in the fall than in the spring, suggesting higher reproductive effort during the fall breeding period. Annual biomass of G. japonicus was 2.16 g DW m -2 yr -1 and was higher in the spring than in the fall breeding periods. The annual secondary production (14.59 g DW m -2 yr -1 ) was higher than those observed for other amphipods inhabiting seagrass beds. However, annual productivity to biomass (P/B) ratio, at 6.74, was lower than those recorded previously in both temperate and tropical seagrass beds because the number of generations decreases the P/B ratio. The combination of high abundance and production suggests an important role for G. japonicus in the seagrass beds ecosystem as a trophic link from primary producers to higher consumers.

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“…This is close to a previous record of J. slatteryi (then called J. falcata) on settling plates in Deukryang Bay, The Republic of Korea (Hong 1983). Jeong et al (2006Jeong et al ( , 2007Jeong et al ( and 2012 found J. slatteryi to be abundant in an eelgrass bed at nearby Gwangyang Bay, The Republic of Korea, which is a heavily industrialized part of the coast.…”

Section: Figurementioning

confidence: 99%

“…2.1-9.5 Borowsky (1985); Franz (1989);d'Udekem d'Acoz (1993); Krapp-Schickel (1993); Coleman (1994); Clark (1997); Dixon & Moore (1997); Conradi & López-González (1999); Relini et al (2000); Clark & Caudill (2001);Valério-Berardo & Flynn (2002); Karez & Ludynia (2003); Moshchenko & Zvyagintsev (2004; Sirenko et al (2004); Alonso de Pina ( 2005 Yu et al (2002Yu et al ( , 2009; Sano et al (2003); Tanaka & Leite (2004); Inglis et al (2006bInglis et al ( , c, 2008; Lim & Park (2006); Jeong et al (2007Jeong et al ( , 2012 MOR 9-15 30-34 LI-11…”

Section: Figure 12mentioning

confidence: 99%

Untitled

2021

Zootaxa

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The amphipod genus Jassa Leach, 1814 now comprises 24 species that occur in temperate regions of both hemispheres on solid substrates from the lower intertidal zone to 500 m depth. The propensity for some species to form dense colonies in water intake structures and offshore platforms has brought them to attention as an unwanted pest. Based on the examination of ~25,000 specimens from ~1,100 museum and private collections, it is evident that some species of Jassa have been transported by human vectors since at least the 19 th century and now occur widely. Their colonial, tube-living habit enables such transport, and collection records document them on ships, buoys and portable water systems as well as on natural movable substrates such as logs, drift algae and larger crustaceans. Because Jassa can be so readily found, but species discrimination has had a problematic history, the purpose of this monograph is to assist researchers to identify species through illustrations, descriptions, keys and habitat summaries. Seven species which were named in the 19 th century but CONLAN ET AL.

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Life History and Reproduction of Jassa Slatteryi (Amphipoda, Ischyroceridae) on a Seagrass Bed (Zostera Marina L.) in Southern Korea

Cited by 18 publications

References 22 publications

Introduced and cryptogenic marine and estuarine species of South Africa

Introduced and cryptogenic marine and estuarine species of South Africa

Reproductive patterns and secondary production of Gammaropsis japonicus (Crustacea, Amphipoda) on the seagrass Zostera marina of Korea

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