Development and growth of larvae of the dog conch, strombus canarium (Mollusca

Gastropoda), in the laboratory

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Zaidi Che Cob, Aziz Arshad, Mazlan Abd. Ghaffar, Japar Sidik Bujang, and Wan Lotfi Wan Muda (2009) Development and growth of larvae of the dog conch, Strombus canarium (Mollusca: Gastropoda), in the laboratory. Zoological Studies 48(1): 1-11. Strombus canarium egg masses used in this study were collected while still underneath spawning females, and embryonic and post-hatching larval development was observed in the laboratory. Strombus canarium larvae were reared at 200 larvae/L in 2-L containers with 0.22 μm filtered seawater medium at a salinity of 30 ± 1 PSU, and fed a single algal species, Isochrysis galbana, at 1000 cells/ml. Fecundity was estimated at 48,745 ± 877 to 93,643 ± 1685 (n = 10) eggs/egg mass. The incubation time was between 110.4 and 134.4 h (mean 122.43 ± 3.07 h, n = 7) at 29 ± 1°C, with a high hatching rate (mean 93.34% ± 1.68% hatched, n = 3). The larvae have 2 velar lobes and 1.5 shell whorls at the time of hatching, with an average shell length of 216.77 ± 5.72 μm (n = 10). Based on prominent larval characters and visible morphological features, S. canarium larvae can be assigned to 4 different development stages, i.e. stages I, II, III, and IV, which are described in this paper. The larvae reached metamorphic competence at 17-23 d posthatching, and only metamorphosed when settlement cues (sediments from its natural habitat and 15 mM KCl) were introduced. They showed a short period of metamorphic competence, and no spontaneous metamorphosis was observed. Morphological changes and larval behaviors at the onset and during metamorphosis are also described. http://zoolstud.sinica.edu.tw/Journals/48.1/1. pdf.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalZoological Studies
Volume48
Issue number1
Publication statusPublished - Jan 2009

Fingerprint

Canarium
Mollusca
Gastropoda
growth and development
dogs
larvae
shell (molluscs)
hatching
egg masses
metamorphosis
Isochrysis galbana
larval development
containers
Strombus
fecundity
seawater
spawning
salinity
sediments
habitats

Keywords

  • Development
  • Malaysia
  • Metamorphosis
  • Veliger

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Development and growth of larvae of the dog conch, strombus canarium (Mollusca : Gastropoda), in the laboratory. / Che Cob, Zaidi; Arshad, Aziz; Abd. Ghaffar, Mazlan; Bujang, Japar Sidik; Wan Muda, Wan Mohd. Lotfi.

In: Zoological Studies, Vol. 48, No. 1, 01.2009, p. 1-11.

Research output: Contribution to journalArticle

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abstract = "Zaidi Che Cob, Aziz Arshad, Mazlan Abd. Ghaffar, Japar Sidik Bujang, and Wan Lotfi Wan Muda (2009) Development and growth of larvae of the dog conch, Strombus canarium (Mollusca: Gastropoda), in the laboratory. Zoological Studies 48(1): 1-11. Strombus canarium egg masses used in this study were collected while still underneath spawning females, and embryonic and post-hatching larval development was observed in the laboratory. Strombus canarium larvae were reared at 200 larvae/L in 2-L containers with 0.22 μm filtered seawater medium at a salinity of 30 ± 1 PSU, and fed a single algal species, Isochrysis galbana, at 1000 cells/ml. Fecundity was estimated at 48,745 ± 877 to 93,643 ± 1685 (n = 10) eggs/egg mass. The incubation time was between 110.4 and 134.4 h (mean 122.43 ± 3.07 h, n = 7) at 29 ± 1°C, with a high hatching rate (mean 93.34{\%} ± 1.68{\%} hatched, n = 3). The larvae have 2 velar lobes and 1.5 shell whorls at the time of hatching, with an average shell length of 216.77 ± 5.72 μm (n = 10). Based on prominent larval characters and visible morphological features, S. canarium larvae can be assigned to 4 different development stages, i.e. stages I, II, III, and IV, which are described in this paper. The larvae reached metamorphic competence at 17-23 d posthatching, and only metamorphosed when settlement cues (sediments from its natural habitat and 15 mM KCl) were introduced. They showed a short period of metamorphic competence, and no spontaneous metamorphosis was observed. Morphological changes and larval behaviors at the onset and during metamorphosis are also described. http://zoolstud.sinica.edu.tw/Journals/48.1/1. pdf.",
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