Methoden zur Zucht larvaler decapoder Crustaceen

Rice, A.L.; Williamson, Donald I.

doi:10.1007/bf01609918

Cited by 35 publications

(13 citation statements)

References 25 publications

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“…Water in each flask was aerated by means of an airstone (Rice & Williamson 1970). Flasks for larval culture were reared in the same thermostatic chamber, on the same surface where adult individuals were reared, at 18°C and were protected by gauze plugs.…”

Section: Methodsmentioning

confidence: 99%

Effect of microalgal food on the sex reversal of Hippolyte inermis (Crustacea: Decapoda)

Zupo¹

2000

Mar. Ecol. Prog. Ser.

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The effect of diatoms of the genus Cocconeis on the sex reversal of the shrimp Hippolyte inermis Leach was examined in the laboratory. Randomised experiments were carried out to investigate the functional response of shrimps to various diets. The benthic diatom Cocconeis neothumensis was offered, alternatively, during the larval phase and during the postlarval phase, and the results obtained with shrimps produced by individual females were compared. Results demonstrated that diets based on green alga Enteromorpha sp. or dry commercial food did not influence the normal protandric development, as most shrimps at sexual maturation were males. Conversely, diets containing C. neothumensis did influence the protandric development, as most shrimps at sexual maturation were females and the sex ratio was significantly different from that obtained with diets not containing C. neothumensis. These results provide an explanation of the patterns observed in the field, and are in accordance with the seasonal abundances of diatoms in the leaf stratum of Posidonia oceanica.

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Section: Methodsmentioning

confidence: 99%

Effect of microalgal food on the sex reversal of Hippolyte inermis (Crustacea: Decapoda)

Zupo¹

2000

Mar. Ecol. Prog. Ser.

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“…An animal with a benthic adult and planktonic larvae may sometimes have a selective advantage over one with no planktonic phase, but the Sergestidae are planktonic throughout life. Laboratory rearing shows that many crustaceans die at metamorphosis (Rice & Williamson, 1970), and repeated metamorphoses potentially pose a multiplied threat to survival. It has been suggested that the life-history of a modern sergestid reflects ancestral hybridizations with a naupliomorph, a plenocarid, a mysidacean and an unknown 'mastigopoid' crustacean.…”

Section: Multiple Larvaementioning

confidence: 99%

Larval transfer and the origins of larvae

Williamson

2001

Zoological Journal of the Linnean Society

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Larval transfer is presented as an alternative to the widely held assumption that larvae and corresponding adults have always evolved together, within the same lineage. I submit (1) that genes specifying the basic forms of all embryos and larvae originated as the genomes of animals that matured without metamorphosis, (2) that such genomes have been transferred by hybridization, and (3) that fertile hybrids have been produced at infrequent and irregular intervals between animals at all levels of relationship during the course of evolution. The origins of blastulas, hydromedusae, protostome and deuterostome ciliated larvae, arthropodan larvae and urochordate tadpoles are discussed as examples of my hypothesis. I believe that practically all metazoans have at least one inter-group hybrid in their ancestry. Larval transfer is briefly considered in relation to other theories on ontogeny and phylogeny. Methods of verification are suggested.

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“…For Stage V J. edwardsii phyllosomas the prey density also had a significant effect on the food capture rate, with numbers captured decreasing as density decreased. If phyllosomas capture insufficient food, the intermoult period may lengthen and the post-moult size reduce , or the number of instars in a stage may increase (Rice and Williamson 1970;Vijayakumaran and Radhakrishnan 1986;Kittaka 1994b;Radhakrishnan and Vijayakumaran 1995).…”

Section: Implications For Culturementioning

confidence: 99%

Effects of light intensity and food density on the growth and survival of early-stage phyllosoma larvae of the rock lobster Jasus edwardsii

Moss¹,

Tong²,

Illingworth³

1999

Mar. Freshwater Res.

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Individual Stage I, III and V phyllosomas of the rock lobster Jasus edwardsii were fed daily with a fixed number (2, 4, 8, 12 or 16) of brine shrimps (Artemia salina, 2–3 mm long) under four different continuous light intensities (10, 0.1, 0.001 and ≤0.0002 µmol s-1 m-2) to determine the optimum requirement for growth and survival. Phyllosomas of each stage fed higher rations of brine shrimps had a significantly shorter intermoult period and larger post-moult size. Light intensity had a significant effect on the post-moult size of Stage I phyllosomas but had no effect on the intermoult period. Individual Stage I, III and V phyllosomas were also fed daily with fixed numbers (2, 4 and 8 respectively) of brine shrimps in containers with different volumes (10, 20, 40, 60, 80, 120 and 240 mL) to alter the prey density while maintaining prey numbers. Prey density had no significant effect on intermoult period or post-moult size but did affect consumption rates. The results are discussed in relation to large-scale culture of phyllosoma larvae.

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Methoden zur Zucht larvaler decapoder Crustaceen

Cited by 35 publications

References 25 publications

Effect of microalgal food on the sex reversal of Hippolyte inermis (Crustacea: Decapoda)

Effect of microalgal food on the sex reversal of Hippolyte inermis (Crustacea: Decapoda)

Larval transfer and the origins of larvae

Effects of light intensity and food density on the growth and survival of early-stage phyllosoma larvae of the rock lobster Jasus edwardsii

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