Self-fertilization:a potential fertilization mode in an estuarine sabellid polychaete

Hsieh, Hwey‐Lian

doi:10.3354/meps147143

Cited by 20 publications

(18 citation statements)

References 16 publications

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“…and Pseudopolydora sp.) and the sabellid (Laonome albicingiilum) larvae constitute the majority of the macroinfaunal larval community and occur almost year round with peaks in spring (March to May) and fall (October to December) (Chang 1992, Hsieh 1995, 1997. Juvenile P. japonica can be found in the planktons; however, this is not the case for the other species.…”

Section: Methodsmentioning

confidence: 85%

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Differential recruitment of annelids onto tidal elevations in an estuarine mud flat

Hsieh¹,

Hsu²

1999

Mar. Ecol. Prog. Ser.

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The recruitment of an annelid community was examined on 2 tidal elevations in 2 kinds of sedirnents along an inclined intertidal mud flat In an estuary in northern Taiwan. Recruitment onto defaunated and ambient intact sediments (control) in both low and high tidal zones was followed weekly from 3 April to 1 May 1996. The overall density of recruits in the defaunated sediments reached the level of the control sediments within 3 wk in the low tidal zone, whereas in the high tidal zone the density of recruits did not reach the control level during the study period. Two polychaete species and 1 oligochaete species were the major recruits, and each exhibited a different recruitment mode and rate. The spionid Prionospio japonica and the oligochaete Doliodrilus tener were among the most rapid recruits. P japonica simultai~eously exhibited 2 recruitment modes, larval settlement and postlarval transportation, and its recruit density in the defaunated sediments in the low t~d a l zone reached the level of the control w~thin 1 wk. D. tener recruited predomnately by means of juvenile migration. In general, recruitment by settling larvae occurred at discrete intervals, whereas that by postlarvae or juveniles appeared to be continuous. The densities of P. japonica and of D. tener exhibited a zonation pattern whereln density increased along a down-shore gradient. The sedimentary characteristics also exhibited a similar zonation pattern, wherein the sediment particles became smaller and silt/clay content increased in the low tidal zone. This coupled phenomenon suggests that tidal action has a strong influence on the recruitment of P. japonica and D. tener. These recruits are passively entrapped in the low tidal zone due to the depositional conditions created by slow flows. However, the tidal zonation of the capitellid Capitella sp. showed an opposite trend, with greater recruitment in the high tidal zone, indicating that the recruitment of CapiteUa sp. possessed an active component. D. tener recruited mostly into the low tidal zone, but a small, significant proportion of the recruitment occurred in the high tidal zone. Cap~tella sp. and D. tener are subsurface burrowers, and thus, to some extent, their recruitment is less controlled by tidal action. Overall, the recru~tment of this annelid community is influenced by both physical and biological controls.

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Section: Methodsmentioning

confidence: 85%

“…The grain sizes range from mud to very fine sand (0.06 to 0.14 mm median particle sizes, Hsieh 1995). Water salinities vary from 0 to 33%0 (Hsieh 1997). The high and low tidal zones are submerged for 1 2 and 18 h, respectively.…”

Section: Methodsmentioning

confidence: 99%

Differential recruitment of annelids onto tidal elevations in an estuarine mud flat

Hsieh¹,

Hsu²

1999

Mar. Ecol. Prog. Ser.

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“…japonica') than to H. diversicolor (Fong & Garthwaite, 1994). Moreover, in habitats such as estuaries, self-fertilization is commonly employed by sessile hermaphroditic organisms that are asynchronous broadcast spawners because sperm are not diluted or exposed to osmotic shock (Hsieh, 1997). When the allocation-return levels associated with being either male or female begin to diminish, individuals that shift additional reproductive resources to the other sex are selected and the simultaneous presence of both sexes in the same individual is considered favourable within an evolutionary context.…”

Section: Introductionmentioning

confidence: 99%

Karyotypic analysis of the hermaphroditic viviparous polychaete, Hediste limnicola (Polychaeta: Nereididae): possibility of sex chromosome degeneration

2009

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Karyotypes of the hermaphroditic polychaete Hediste limnicola were examined using an air-drying method and genetic material prepared from regenerating tail and newborn juveniles. Materials were obtained from a lineage of cultured worms originating from Watsonville Slough (California, USA) and maintained for six years in the laboratory. Giemsa-stained preparations were analysed by a computer-assisted image-analysing system for the identification of each chromosome pair. A diploid chromosome number of 26 was obtained from well-spread metaphase chromosomes of mitotic cells, consisting of metacentric (N ¼ 11), submetacentric (N ¼ 1) and telocentric (N ¼ 1) chromosomes. It is possible that hermaphroditism in this species evolved through loss of a pair of sex chromosomes, which are present in closely related congeneric species.

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“…Within Annelida, the members of the family Sabellidae are one of the most widely studied groups in terms of modes of reproduction and development (McEuen et al. ; Rouse & Fitzhugh ; Bick ; Giangrande ; Hsieh ; Rouse & Gambi ,b; Gambi et al. , ; Giangrande et al.…”

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Larval development and post‐larval growth of Branchiomma bairdi (Annelida: Sabellidae) from a Mediterranean population

Pasqua

Lezzi

Licciano

et al. 2017

Invertebrate Biology

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Branchiomma bairdi is a Caribbean fan worm introduced in several localities worldwide, including the Mediterranean Sea, where the species’ range has rapidly expanded. Reproduction in B. bairdi was previously investigated in both extra‐Mediterranean and Mediterranean areas, but no information is available on larval development and post‐larval growth. In the present article, we examined these features for a population from the Mar Grande of Taranto (Ionian Sea). The species is hermaphrodite, and fertilization occurs in situ. Mucus seems to play an important role in fertilization, and also in preserving eggs before fertilization. The trochophore stage develops within the mucus and after hatching, larvae swim for about 3 d before settlement. The trochophore showed a distinct prototroch and two red dorsolateral larval eyes. The pelagic stage takes only 96 h even though prototroch is maintained after settlement, disappearing at 5 d, when larvae showed three chaetigers and branchial crown consisted of four radioles. Some interesting observations concerning changes in the morphology of chaetae and in the number of uncini during growth are also reported, together with discussion of the development of stylodes, an important diagnostic feature in Branchiomma species identification.

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Self-fertilization:a potential fertilization mode in an estuarine sabellid polychaete

Cited by 20 publications

References 16 publications

Differential recruitment of annelids onto tidal elevations in an estuarine mud flat

Differential recruitment of annelids onto tidal elevations in an estuarine mud flat

Karyotypic analysis of the hermaphroditic viviparous polychaete, Hediste limnicola (Polychaeta: Nereididae): possibility of sex chromosome degeneration

Larval development and post‐larval growth of Branchiomma bairdi (Annelida: Sabellidae) from a Mediterranean population

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