Comparison of the life cycles of two sympatric estuarine polychaetes, Hediste diadroma and H. atoka (Polychaeta: Nereididae), in the Nanakita River estuary, northeastern Japan

Kikuchi, Eisuke; Yasuda, Koji

doi:10.1007/s10201-006-0169-x

Cited by 21 publications

(13 citation statements)

References 22 publications

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“…In Capitella (Grassle & Grassle ), it could be shown that the species presence were partly separated in time, and in others ecological differences might be invoked for the sympatric existence (Blank et al . ; Paxton ; Kikuchi & Yasuda ; Nygren et al . ).…”

Section: Discussionmentioning

confidence: 99%

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Cryptic polychaete diversity: a review

2013

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Nygren, A. (2014). Cryptic polychaete diversity: a review. -Zoologica Scripta, 43, 172-183. This review summarises the current knowledge on cryptic species of polychaetes, one of the most dominant taxa in marine communities, and gives a brief overview of the different methods that has been used for their disclosure. Cryptic species constitute an important part of biodiversity and they are common among all kinds of polychaetes, with different life history traits, and may have sympatric as well as allopatric distributions. It is emphasised that cryptic species must not be neglected for a variety of reasons, and even though the magnitude of cryptic species is largely unknown the available data on polychaetes clearly demonstrate that morphology alone seriously underestimate the number of species. It is suggested that future research should focus on appropriately designed case-studies using combined approaches, as well as on large-scale whole sample analyses using next-generation sequencing in order to be able to answer the many questions that still remains.

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Section: Discussionmentioning

confidence: 99%

“…; Bastrop et al . ; Sato ; Kikuchi & Yasuda ; Lewis & Karageorgopoulos ), feeding biology (Wiklund et al . ), habitat and depth preferences (Bellan & Lagardère ; Paxton ; Ekaratne et al .…”

Section: Why Are Cryptic Species Important?mentioning

confidence: 99%

Cryptic polychaete diversity: a review

2013

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“…In some nereidid species, the reproductive season was reported to vary between regions. For example, reproductive swarming of Hediste diadroma Sato & Nakashima 2003 was observed in winter or early spring at Kyushu and Honshu, but occurred in June at Hokkaido (Sato & Tsuchiya 1987, Sato & Nakashima 2003, Kikuchi & Yasuda 2006. Previous studies have shown that growth and reproduction of Annelida are influenced by diet and even more so by temperature (Levin & Creed 1986, Olive 1995, Olive et al 1997.…”

Section: Discussionmentioning

confidence: 99%

Reproductive season and life span of an estuarine polychaete, Simplisetia erythraeensis (Annelida, Nereididae), in Southern Japan

Ueno

Sato

Yamamoto

2019

Plankton Benthos Res

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The reproductive season and life span of the common estuarine polychaete Simplisetia erythraeensis (Annelida: Nereididae) was investigated by monthly sampling during the years 2015 and 2016 in two tidal flats at two different regions in southern Japan: Shigetomi in Kagoshima Bay, Kyusyu Island, a warm-temperate region and Ichi on Amami-Oshima Island, Ryukyu Islands, a maritime subtropical region. At both sites, one or two cohorts were distinguished simultaneously using monthly body-width histograms. Recruitment of new cohorts occurred from August in Kagoshima Bay and from July on Amami-Oshima Island. Ovigerous females were observed from March to August in the former area and from April to July in the latter area, with the highest female maturity rate (number of females with oocytes/total number of adults larger than the smallest mature size) in July in both areas. The maximum value of the mean oocyte size of each female increased with increasing female maturity rates. The density of each cohort decreased from May onward because of the death of adults after reproduction, which resulted in the complete disappearance of the cohort in early October. Our results showed that the life span of S. erythraeensis was one year, and the reproductive period occurred in summer.

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“…However, the two species of Composetia may be able to disperse long way from an estuary to another one beyond the sea at their juvenile or adult phases by means of floating and swimming behavior of juveniles, as reported in H. atoka (Sato 1999;Kikuchi and Yasuda 2006) or riding of juveniles and adults on driftwoods, because their juveniles and adults seem to survive the travel through full-strength seawater as mentioned above.…”

Section: Geographical Distribution and Habitat Preferencementioning

confidence: 90%

Distributions and Variations of Two Estuarine Species of Composetia (Annelida: Nereididae) in the Ryukyu Islands, Southern Japan, with a New Record of Composetia tokashikiensis from Thailand

et al. 2020

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By the survey on the nereidid fauna in small estuaries in creeks in the Ryukyu Islands, southern Japan, two species of Composetia Hartmann-Schröder, 1985, C. kumensis Sato, 2020 (type locality: Kume-jima island, the Ryukyu Islands) and C. tokashikiensis Sato, 2020 (type locality: Tokashiki-jima island, the Ryukyu Islands) have been newly collected from 10 sites on 5 islands, and from 20 sites on 6 islands, respectively. In 26 of a total of 28 sites, one of the two species occurred exclusively, but both of them coexisted in two sites in Oura Bay on Okinawa-jima island. Morphological variations and genetic differentiations among the local populations of the two species were examined. Molecular analyses based on the partial sequences of the mitochondrial cytochrome c oxidase subunit I gene supported that the morphologically similar two species are certainly distinct species. In C. kumensis, marked genetic differentiation was detected among populations in the following three regions in the middle Ryukyu Islands: (1) northern Kume-jima, (2) southern Kume-jima, and (3) Okinawa-jima and Kikai-jima islands. In contrast, no marked genetic differentiation was detected among any populations of C. tokashikiensis in a wide range of the middle and southern Ryukyu Islands. A single specimen of C. tokashikiensis was also collected from an euryhaline area of the lower reaches of Songkhla Lagoon, southern Thailand. A morphological description of this specimen is provided here as a new record of this species from Thailand.

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Comparison of the life cycles of two sympatric estuarine polychaetes, Hediste diadroma and H. atoka (Polychaeta: Nereididae), in the Nanakita River estuary, northeastern Japan

Cited by 21 publications

References 22 publications

Cryptic polychaete diversity: a review

Cryptic polychaete diversity: a review

Reproductive season and life span of an estuarine polychaete, <i>Simplisetia erythraeensis</i> (Annelida, Nereididae), in Southern Japan

Distributions and Variations of Two Estuarine Species of <i>Composetia</i> (Annelida: Nereididae) in the Ryukyu Islands, Southern Japan, with a New Record of <i>Composetia tokashikiensis</i> from Thailand

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