Introduction of the northern Pacific asteroid Asterias amurensis to Tasmania: reproduction and current distribution

Byrne, Maria; Morrice, Margaret G.; Wolf, Blair O.

doi:10.1007/s002270050058

Cited by 89 publications

(65 citation statements)

References 22 publications

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“…lunar cycle (Holothuria scabra (Jaeger), Mercier et al (2000)), photoperiod (Coscinasterias muricata (Verrill), Georgiades et al (2006), Pisaster ochraceus (Brandt), Pearse & Eernisse (1982), Asterias amurensis (Lüken), Byrne et al (1997), Odontaster validus (Koehler), Pearse and Bosch (2002)), diet (Echinocardium cordatum (Pennant), Nunes & Jagoux (2004)), salinity (Allostichaster capensis (Perrier), Rubilar et al (2005)) and temperatures (Stichopus japonicas (Selenka), Tanaka (1958), Holothuria atra (Jaeger), Holothuria edulis (Lesson), and Stichopus chloronotus (Brandt), Uthicke (1997)). In laboratory experiments, Lucas (1973) showed that luner cycle does not influenced spawning of A. planci, but that it is regulated by either water temperatures and/or photoperiods.…”

Section: Discussionmentioning

confidence: 99%

Latitudinal differentiation in the reproduction patterns of the crown-of-thorns starfish Acanthaster planci through the Ryukyu Island Archipelago

Yasuda

Ogasawara²,

Kajiwara³

et al. 2010

Plankton Benthos Res

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Chronic outbreaks of the coral eating crown-of-thorns starfish (Acanthaster planci) have devastated coral communities throughout the Ryukyu Islands in the past four decades. Since A. planci has high fecundity and long larval duration, knowledge of reproductive timing and larval dispersal are keys to understanding mechanisms of successive recruitment and consequent outbreaks of adults. As the first step to acquiring this knowledge, we monitored water temperature and peak spawning periods using gonad observation. A total of 379 A. planci specimens were collected from

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Section: Discussionmentioning

confidence: 99%

Latitudinal differentiation in the reproduction patterns of the crown-of-thorns starfish Acanthaster planci through the Ryukyu Island Archipelago

Yasuda

Ogasawara²,

Kajiwara³

et al. 2010

Plankton Benthos Res

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“…To describe gametogenesis, 24 starfish (12 of each sex) were used from each season. Gonad development was described in three stages, based on the frequency of cell types, size and shape of acinus, with adaptations, BYRNE et al (1997) andPASTOR-DE-WARD et al (2007). Frequency of gametogenesis stages were compared seasonaly for each sex.…”

Section: Methodsmentioning

confidence: 99%

Reproductive biology in the starfish Echinaster (Othilia) guyanensis (Echinodermata: Asteroidea) in southeastern Brazil

Mariante¹,

Lemos²,

Eutrópio³

et al. 2010

Zoologia (Curitiba, Impr.)

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Echinaster (Othilia) guyanensis Clark, 1987 is an endangered starfish distributed throughout the Caribbean and Atlantic Ocean. Even though it has been extensively harvested, little is known about the biology and ecology of this starfish. Here, we examine reproduction seasonality in E. (O.) guyanensis. Individuals were collected monthly for one year, including four complete lunar phases. The gonad index (GI) was calculated to determine annual and monthly reproductive peaks. Gametogenesis stages were also determined. Sex ratio was 1:1.33 (M:F). Gonadosomatic index, body weight, central disc width and arm length were similar for both sexes. Gonads were present in all animals with arm length greater than 36.2 mm. Lunar phase was not associated with E. (O.) guyanensis reproduction. GI and gametogenesis patterns suggest that starfish have an annual reproductive peak with spawning during autumn months (March to May)

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“…The animals from Tasmania are known to be the offspring of those that invaded from Tokyo Bay [19], and no significant differences were found between the Japanese and Tasmanian animals. The mature eggs were collected in artificial seawater (ASW) by treating the ovaries with 10 μM 1-methyladenine.…”

Section: Gametes and Modified Seawatersmentioning

confidence: 98%

Cyclic AMP-dependent PKA phosphorylates starfish sperm proteins during acrosome reaction

2007

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Abstract:The induction of acrosome reaction (AR) happens when starfish spermatozoa encounter the egg jelly (EJ). This complex process involves different signal transduction pathways, such as elevation of cAMP and the activation of protein kinase A (PKA). The specific inhibitors of PKA (H89 and KT5720) have been shown to inhibit the EJ-induced Ca 2+ elevation and AR. By using a Phospho-Ser/Thr PKA substrate antibody, we have detected an increased phosphorylation of 150, 200 and 220-kDa protein bands when starfish spermatozoa treated with EJ. The specific PKA inhibitors effectively inhibit phosphorylation of these proteins, suggesting an involvement of PKA on EJ-induced AR.

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Introduction of the northern Pacific asteroid Asterias amurensis to Tasmania: reproduction and current distribution

Cited by 89 publications

References 22 publications

Latitudinal differentiation in the reproduction patterns of the crown-of-thorns starfish Acanthaster planci through the Ryukyu Island Archipelago

Latitudinal differentiation in the reproduction patterns of the crown-of-thorns starfish Acanthaster planci through the Ryukyu Island Archipelago

Reproductive biology in the starfish Echinaster (Othilia) guyanensis (Echinodermata: Asteroidea) in southeastern Brazil

Cyclic AMP-dependent PKA phosphorylates starfish sperm proteins during acrosome reaction

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