Observations on the spawning, development and rearing of the South African abalone<i>Haliotis midae</i>Linn.

Genade, Angie; Hirst, AJ; Smit, C.J.

doi:10.2989/025776188784480465

Cited by 32 publications

(26 citation statements)

References 3 publications

(4 reference statements)

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“…Juvenile shell colour is affected by the food consumed. Similar dietary pigmentation was observed in H. midae by Genade et al (1988). This property can be utilised to produce quality abalone pearls by altering the iridescence of the shell interior.…”

Section: Discussionmentioning

confidence: 54%

“…The results of the present experiment on the seed production of H. varia reveal that the larval production and rearing of this species are more or less similar to and within the time confines of other commercially important Haliotis species (Ebert and Houk, 1984;Genade et al, 1988;Capinpin and Hosoya, 1995). The spat of this species can be produced in a commercial scale, if the necessary requirements are provided.…”

Section: Discussionmentioning

confidence: 72%

“…The fully formed first respiratory pore was observed within 27 days postfertilisation at 27 jC. It was 8 weeks in H. rufescens at 15 jC (Ebert and Houk, 1984) and 43 days in H. midae (Genade et al, 1988). Juveniles fed with crustose red algae had faster growth than those fed with the other two feeds.…”

Section: Discussionmentioning

confidence: 80%

“…The disadvantage of this method is the loss of control over the fertilisation process (Hahn, 1989). Fertilised eggs of H. varia are smaller (180 Am) compared to that of Haliotis iris (230 Am; Harrison and Grant, 1971) and Haliotis midae (222 Am; Genade et al, 1988).…”

Section: Discussionmentioning

confidence: 99%

“…Extensive literature are available on the spawning and larval rearing of the temperate species of abalone in the last two decades (Du and Guo, 1981;Tong, 1982;Baudry, 1982;Nie et al, 1984;Pena, 1984;Ebert and Houk, 1984;Tong et al, 1987;Genade et al, 1988;Iang et al, 1992). Although there is a high demand for cocktail-size tropical abalones in the international market (Chen, 1989), intensive efforts for their propagation have been initiated only recently (Jarayabhand et al, 1995;Capinpin and Hosoya, 1995;Jarayabhand and Paphavasit, 1996).…”

Section: Introductionmentioning

confidence: 99%

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Seed production and juvenile rearing of the tropical abalone Haliotis varia Linnaeus 1758

Najmudeen

Victor

2004

Aquaculture

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Spawning, larval and juvenile rearing of the tropical abalone Haliotis varia L. were studied. Brood stock abalone were induced to spawn by exposure to air for 2 h at 27 jC. Female abalone spawned a mean of 76,530 eggs. Fertilised eggs measured 180 Am in diameter. Seventy percent survival was obtained during larval rearing. Larvae passed trochophore, veliger, gliding and creeping stages and were induced to settle on a mat of diatoms containing Nitszchia sp. and Navicula sp. The larval rearing period of H. varia ranged from 4 to 6 days at 27 jC. The settled spat vigorously fed on the diatom mat until the 50th day of postfertilisation and coralline red algal film, until the 70th day of postfertilisation. First respiratory pore was formed on the 27th day of postfertilisation. Juvenile abalones were reared on three algal diets such as coralline red algae, green filamentous algae and Ulva lactuca from the 71st to 200th day of postfertilisation. Those fed with coralline algae showed best and consistent growth. Shell colour of juveniles was affected by diet. The present study on the production of juveniles in the hatchery is a baseline information to initiate abalone aquaculture in India and to help augment the natural population. D

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Section: Discussionmentioning

confidence: 54%

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seed production and juvenile rearing of the tropical abalone Haliotis varia Linnaeus 1758

Najmudeen

Victor

2004

Aquaculture

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A case study of abalone poaching in South Africa and its impact on fisheries management

Sowman

Sweijd

1999

ICES Journal of Marine Science

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A comparison of various seaweed-based diets and formulated feed on growth rate of abalone in a land-based aquaculture system

Naidoo

Maneveldt

Ruck³

et al.

Eighteenth International Seaweed Symposium

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. A comparison of various seaweed-based diets and formulated feed on growth rate of abalone in a land-based aquaculture system. JOURNAL OF APPLIED PHYCOLOGY, University Key words: abalone, diet, growth, seaweed, Ecklonia, Haliotis midae. AbstractThe effects of different diets on growth in the cultured South African abalone, Haliotis midae (Linnaeus), was investigated. Growth of juvenile Haliotis midae was monitored on a commercial abalone farm over a period of 9-months in an experiment consisting of 9 treatments with 4 replicates (n = 250 individuals per replicate). The treatments were: fresh kelp (Ecklonia maxima) blades (seaweed control); Abfeed® (formulated feed control); kelp + Abfeed®; dried kelp pellets; dried kelp blades; dried kelp stipes; fresh kelp with the epiphyte Carpoblepharis flaccida; a mixed diet (Gracilaria gracilis, Ulva lactuca, and kelp) and a rotational diet (abalone were fed 1 of the 9 treatments for the first week and them kelp for the next 3 weeks). Results show that abalone grow well on all fresh seaweed combinations, but do best on a mixed diet. The likely reason for the success of the mixed diet is that the red and green seaweed was farm grown, with an increased protein content. Dried kelp in any form produced poor growth. Abalone fed on the mixed diet grew at 0.066 mm day‫¹-‬ shell length and 0.074 g day‫¹-‬ body weight; this corresponds to 24.09 mm shell length and 27.01 g body weight increase per annum. Abalone fed on dried kelp grew at only 0.029 mm day‫¹-‬ shell length and of 0.021 g day‫¹-‬ body weight. Abalone grown on Abfeed® grew at 0.049 mm day‫¹-‬ shell length and 0.046 g day‫¹-‬ body weight which corresponds to 17.88 mm and 16.79 g increase per annum; this is better than the dried seaweed feeds, but poorer than the fresh seaweed combinations. This study shows that seaweed diets, particularly if the diets include seaweeds grown in animal aquaculture effluent, are good substitutes for the formulated feeds generally used today.

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Observations on the spawning, development and rearing of the South African abaloneHaliotis midaeLinn.

Cited by 32 publications

References 3 publications

Seed production and juvenile rearing of the tropical abalone Haliotis varia Linnaeus 1758

Seed production and juvenile rearing of the tropical abalone Haliotis varia Linnaeus 1758

A case study of abalone poaching in South Africa and its impact on fisheries management

A comparison of various seaweed-based diets and formulated feed on growth rate of abalone in a land-based aquaculture system

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