Potential for Asexual Propagation of Several Commercially Important Species of Tropical Sea Cucumber (Echinodermata)

Reichenbach, Norman; Holloway, Steve

doi:10.1111/j.1749-7345.1995.tb00255.x

Cited by 23 publications

(19 citation statements)

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“…Asexual reproduction in holothurians has been particularly studied in S. chloronotus , the greenfish sea cucumber (Conand et al., ; Reichenbach & Holloway, ; Uthicke, Benzie, & Ballment, ; Uthicke & Conand, ; Uthicke, Conand, & Benzie, ). This species is found in the Indian and Pacific Oceans, inhabiting reef flats and back‐reef areas that are less than 20 m deep (Franklin, ).…”

Section: Introductionmentioning

confidence: 99%

Clonal structure through space and time: High stability in the holothurianStichopus chloronotus(Echinodermata)

Pirog

Gélin

Bédier

et al. 2017

Ecology and Evolution

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Sea cucumbers are increasingly exploited for human consumption and for their curative properties, and many wild populations are now depleted or in danger of extinction. While aquaculture is seen as an alternative to fisheries and as a mean to restore wild populations, more knowledge is needed on their reproductive strategies to render this practice efficient, notably for fissiparous holothurians, which are some of the mobile animals able of asexual reproduction by transverse fission. Little information is available on their population genetic diversity and structure. Here, the clonal structure of populations of the fissiparous sea cucumber Stichopus chloronotus has been investigated using nine microsatellite loci and a random sampling, at different spatial (intra‐reef and inter‐reef) and temporal (inter‐season and inter‐year) scales. Our findings highlight the importance of asexual reproduction in maintaining these populations, and the prevalence of the “initial seedling recruitment” strategy (ISR), leading to a high stability of clonal composition over seasons and years. It also seemed that clonal propagation was limited to the reef scale (<10 km) while reefs were connected by sexual dispersal. This is the first time that clonal structure in sea cucumbers has been studied at such a fine scale, with a specific sampling strategy. It provides key findings on the genetic diversity and structure of fissiparous sea cucumbers, which will be useful for the management of wild populations and aquaculture.

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Section: Introductionmentioning

confidence: 99%

Clonal structure through space and time: High stability in the holothurianStichopus chloronotus(Echinodermata)

Pirog

Gélin

Bédier

et al. 2017

Ecology and Evolution

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“…Where, D=number of divided samples N=total number of samples Survival rate was calculated as reported by Reichenbach and Holloway (1995) as follow:…”

Section: Induction Of Asexual Reproduction In Eviscerated (Ev) and Nomentioning

confidence: 99%

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Moussa¹,

Nasef²,

Abdel-Latif³

2019

Turk. J. Fish. Aquat. Sci.

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The current study describes a new method for asexual reproduction induction by fission. It results in higher rates of growth, survival and gut regeneration as compared to the conventional technique. Prior to asexual reproduction induction, samples were exposed to chemical evisceration induction through injection of 0.5 ml of 0.45M KCI into perivisceral coelomic cavity. Fission was induced in eviscerated group and normal (non-eviscerated) group through tightening the rubber bands around animal's body at the middle. We compared the modes of fission and the rates of growth, survival and gut regeneration over five months between two groups. We propose a new asexual reproduction induction method in which sea cucumber chemically induced to eviscerate prior to fission induction.

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“…Where, N = number of divided specimens T = total number of specimens Survival rate was calculated as reported by Reichenbach and Hollway [17] as follow:…”

Section: Fission Rate = N / T X 100mentioning

confidence: 99%

Factors Influencing the Prospect of Asexual Reproduction in Holothuria Arenicola (Semper, 1868)

Rm¹

2018

IJOAC

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Asexual reproduction by transverse fission was studied in populations of Holothuria arenicola through investigation of different factors affecting the fission and survival rates. Size, fission position, and temperature impacts were experimentally assessed. It was observed that higher fission rate was recorded in small specimens as compared to large ones. The fission position at 30% yielded higher fission rate (90%) as compared to that obtained in 45% fission (70%). Temperature showed a considerable effect on either fission or survival rate with a direct proportional relationship between temperature and both rates. At 20°C, fission started in the 2 nd day to be at rate of 20% which was gradually increased until reaching 100% by the 8 th day; sharp decline of survival rate was occurred reaching 35% by the 9 th day. At 25°C, fission reached 70% by the 8 th day; the survival rate became constant at 50% from the 17 th day onward. At 30°C, the highest fission rate was attained in the 4 th day but the survival rate was zero in the 5 th day. It was noted that the woundhealing period took longer time at 30°C than at 20°C and 25°C. Additionally, changes of anterior parts (A) and posterior parts (P) internal organs were followed weekly over two months after fission induction to detect both of the dissolved structure and regenerated one.

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Potential for Asexual Propagation of Several Commercially Important Species of Tropical Sea Cucumber (Echinodermata)

Cited by 23 publications

References 1 publication

Clonal structure through space and time: High stability in the holothurianStichopus chloronotus(Echinodermata)

Clonal structure through space and time: High stability in the holothurianStichopus chloronotus(Echinodermata)

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Factors Influencing the Prospect of Asexual Reproduction in Holothuria Arenicola (Semper, 1868)

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