Zur embryonal- und larvalentwicklung von Scalpellum scalpellum L. (crust. cirr.)

Kaufmann, Reinhard

doi:10.1007/bf00399512

Cited by 26 publications

(15 citation statements)

References 20 publications

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“…Scalpellum scalpellum cyprids will not attach to any substratum until at the earliest 2 days after the nauplius–cypris moult (Kaufmann, ; Spremberg et al ., ). For settlement experiments, such 2‐day‐old cyprids were transferred to clean cages to avoid any contamination.…”

Section: Methodsmentioning

confidence: 99%

“…Cyprids that attach in the receptacle area of adult hermaphrodites (alongside the edges of the scutal plates) develop into dwarf males (Svane, ; Spremberg et al ., ), and those that attach to hydroids or other substrata develop into hermaphrodites. Metamorphosis never occurs in cyprids that have not cemented themselves to a substratum (Kaufmann, ; Svane, ; Spremberg et al ., ).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Sex determination in the androdioecious barnacleScalpellum scalpellum(Crustacea: Cirripedia)

Høeg

Yusa

Dreyer

2015

Biol. J. Linn. Soc.

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How androdioecy (coexistence of hermaphrodites and males) is maintained is still poorly understood. Therefore, sex determination was studied in the androdioecious barnacle Scalpellum scalpellum L. First, 247 cypris larvae from seven broods were investigated for sexual dimorphism in larval morphology and found to be all identical. Second, experiments with cyprids showed that males and hermaphrodites differ distinctly in morphology as soon as 4-5 days after settlement. Third, 14 252 cyprids were allowed to settle on the bottom of their culture cages, and all surviving larvae developed into hermaphrodites and none into dwarf males. Fourth, larvae settled in hermaphrodite receptacles (i.e. future males) were removed at increasing intervals after settlement to study if the male and hermaphrodite sexual expressions are fixed or plastic. All larvae became dwarf males if allowed to stay there for more than 8 h after settlement. But if removed within 3 h after settlement, half of them developed into hermaphrodites. We conclude that an environmental sex determination mechanism operates in S. scalpellum. Together with a 1:1 hermaphrodite/male ratio observed in previously reported experiments offering a free choice of settlement, we suggest that all larvae are potential hermaphrodites, but only 50% can settle in hermaphrodite receptacles and yield males.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Sex determination in the androdioecious barnacleScalpellum scalpellum(Crustacea: Cirripedia)

Høeg

Yusa

Dreyer

2015

Biol. J. Linn. Soc.

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“…This may have 1937Batham. 1946Kaufmann, 1965Lewis, 1975 Dineen (present study) been a consequence of sampling at the end of the breeding season. Reproductive patterns in Lithotrya dorsalis have not been documented.…”

Section: Rearing Techniquesmentioning

confidence: 91%

“…Dalley (1984) has since successfully reared the naupliar stages of Conchoderma amiturn (L.). Of these pedunculate barnacles, only four are scalpellids (Thoracica: Scalpellidae): Capitullum mitella L. (= Mitella mitella = Pollicipes mitella) (Yasugi, 1937); Calantica spinosa Quoy and Gaimard ( = Pollicipes spinosiis) (Batham, 1946); Scalpellum scalpellum L. (Kaufmann, 1965); and Pollicipes polymerus Sowerby (Lewis, 1975). The burrowing habit oiLithotrya makes it unique not only among the scalpellids but among the thoracican cirripeds in general.…”

Section: Introductionmentioning

confidence: 99%

THE LARVAL STAGES OFLITHOTRYA DORSALIS(ELLIS & SOLANDER, 1786): A BURROWING THORACICAN BARNACLE

Dineen¹

1987

The Biological Bulletin

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Lithotrya dorsalis is a member of the only genus of thoracican barnacles known to burrow and is widely distributed throughout the tropical western Atlantic. It occurs primarily in high energy intertidal environments. L. dorsalis undergoes the typical thoracican larval sequence. Six naupliar stages are followed by the cyprid stage. These larvae were reared in the laboratory and their stages are described for the first time. Newly hatched stage I nauplii are typically 360 ^m in total length; larval size increases to 1100 urn by the 6th instar. The most distinguishing characteristic of Lihtolrya dorsalis nauplii is the presence of unusually long, spinulated posterior shield spines in stages IV through VI. Complete larval development (stage I nauplius to cyprid) averaged 18 days and ranged from 12 to 23 days. Scanning electron micrograph descriptions of the cyprid cuticle of this animal, showing a unique striated appearance, are also included.

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“…We also measured, as accurately as possible, the maximum length of the adult dwarf males in all investigated species. To this we added existing reproductive data on some of the species investigated (Kaufmann, 1965;Buhl-Mortensen & Høeg, 2006Ozaki et al, 2008;Spremberg et al, 2012). We statistically analysed the relationships between receptacle morphology and traits of females/hermaphrodites and dwarf males among the 11 species using JMP v.11 (SAS Institute, Cary, North Carolina).…”

Section: Reproductive Data and Statistical Analysesmentioning

confidence: 99%

In the footsteps of Darwin: dwarf male attachment sites in scalpellid barnacles (Crustacea: Cirripedia: Thoracica) – implications for phylogeny and the evolution of sexual systems

Dreyer

Yusa

Gale

et al. 2018

Zoological Journal of the Linnean Society

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Zur embryonal- und larvalentwicklung von Scalpellum scalpellum L. (crust. cirr.)

Cited by 26 publications

References 20 publications

Sex determination in the androdioecious barnacleScalpellum scalpellum(Crustacea: Cirripedia)

Sex determination in the androdioecious barnacleScalpellum scalpellum(Crustacea: Cirripedia)

THE LARVAL STAGES OFLITHOTRYA DORSALIS(ELLIS & SOLANDER, 1786): A BURROWING THORACICAN BARNACLE

In the footsteps of Darwin: dwarf male attachment sites in scalpellid barnacles (Crustacea: Cirripedia: Thoracica) – implications for phylogeny and the evolution of sexual systems

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