Studies on southern Australian abalone (genus Haliotis). VI. Habitat preference, abundance and predators of juveniles

Shepherd, S.A.; Turner, Joseph A.

doi:10.1016/0022-0981(85)90245-x

Cited by 110 publications

(58 citation statements)

References 20 publications

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“…In their natural environment, abalone larvae settle exclusively on crustose red algae Shepherd and Tumer, 1985). Spats of H. varia are seen on the rocks or coral pieces with coralline red algae.…”

Section: Discussionmentioning

confidence: 99%

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: 99%

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

Najmudeen

Victor

2004

Aquaculture

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“…data). In contrast, presumably owing to the greater mobility of boulders in shallow water, juvenile habitat in the shallows was relatively free of encrusting biota except for crustose coralline algae, the preferred settlement surface for larval abalone (Shepherd & Turner 1985;Shepherd & Daume 1996). The apparent preference of juvenile H. iris for shallow habitat may result from the availability of suitable cryptic habitat rather than differences in settlement rates.…”

Section: Discussionmentioning

confidence: 99%

Variation in spawning and recruitment ofHaliotis iris(Mollusca: Gastropoda)

McShane

Innzna

1996

New Zealand Journal of Marine and Freshwater Research

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Variations in the gonad index, gamete production, the density of post-settlement individuals (recruits), and the density of juveniles were measured for a population of the New Zealand abalone Haliotis iris during a 4-year study. Seasonal variation in a macroscopic gonad index was consistent with annual spawning and the appearance of recruits, but there was interannual variation in the frequency and magnitude of spawning, and the timing of recruitment. Rates of recruitment of H. iris measured by three different methods (suction, examination of substrata, and artificial collectors) were recorded as low (< 1 m -2 ) in deep (6-8 m) and shallow (1-2 m) habitats. After spawning, there was spatial variation in the density of recruits and the frequency of individuals on artificial collectors. However, densities of recruits were similar between shallow and deep habitats, although juveniles were more common in shallow habitat. In the shallow habitat, the low density of recruits measured in 1 year was reflected in a low density of juveniles censused a year later, but 1-year-olds were comparatively rare in deep habitat. Habitatrelated factors may affect recruitment in H. iris and may explain why levels of recruitment are lower than for other species of abalone whose recruitment has been examined. M95059

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“…Por el contrario, en el intermareal dominan los juveniles de H. fulgens y la fauna vágil, cuya tolerancia a las altas temperaturas y a la desecación es superior a la de la fauna sésil (Jackson, 1977). relationship, in which the juveniles benefit by blending with the pink colour of the crustose algae, and they, in turn, have greater access to light as a result of the abalone's herbivorous action (Shepherd and Turner, 1985;Shepherd and Daume, 1996). On the other hand, the concealment of juveniles smaller than 3 mm in the depressions and cavities of the rock and crusts themselves was frequently observed during the study period and coincides with that found by McShane and Naylor (1995) for Haliotis iris Gmelin, 1791.…”

Section: Discussionmentioning

confidence: 99%

“…Abalone juveniles have been reported to have cryptic habits (Cox, 1962), generally living under rocks (Edwards, 1913, in Cox, 1962Kangas and Shepherd, 1984;Shepherd and Turner, 1985;McShane, 1994). The type of substrate, depth, presence of macroalgal beds and, to a great extent, places of refuge and of low wave exposure are factors that determine a high density of juveniles (Tegner and Butler, 1985;Searcy, 1986;McShane, 1994;McShane and Naylor, 1995;Shepherd and Partington, 1995).…”

Section: Introductionmentioning

confidence: 99%

Microhabitat and associated biota of abalone juveniles, Haliotis fulgens and H. corrugata, in Bahía Tortugas, Baja California Sur, Mexico

et al. 2003

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Abalone is an important economical resource on the west coast of Baja California. The most important species in this fishery are green and pink abalone (Haliotis fulgens and H. corrugata, respectively). Overfishing has been implicated in the decline of the Mexican abalone fishery. Among the population parameters, recruitment is a highly variable event. To obtain a better understanding of the ecology of abalone juvenile recruitment, the physical and biological characteristics of the microhabitat of juveniles of green and pink abalone were studied at Bahía Tortugas, Baja California Sur (Mexico), during autumn and spring from 1996 to 1998. Two abalone reefs with different depth, relief and wave exposure were surveyed: Clam Bay, with depths of 0.5 to 5 m, and Morro de Adentro, with depths of 6 to 12 m. Four different bottom types were recognized: (a) sheltered and low relief bottom, (b) semiexposed and moderate relief bottom, (c) exposed and high relief bottom, and (d) exposed and moderate relief bottom. Juveniles of green and pink abalone from 3 to 13 mm shell length were observed under small rocks, pebbles and flat stones no longer than 15|00E2|??20 cm, always covered with crusts of coralline algae. Several tiny juveniles of Fisurella, Stenoplax, and Crepipatella of similar sizes (5–10 mm) shared the microhabitat. Juveniles between 15 and 90 mm shell length were found under flat, rhombic or irregular-shaped rocks (20–110 mm length), most of them deployed in imbricate arrangement. Abalone juveniles shared this microhabitat with bryozoans, sponges, ascidians, chitons, and annelids. Bottoms with imbricate arrangement, low wave exposure, and the low depth of Clam Bay were favorable for the high occurrence of juveniles of H. fulgens. Juveniles of H. corrugata showed a high occurrence in exposed and deeper zones of Morro de Adentro.

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Studies on southern Australian abalone (genus Haliotis). VI. Habitat preference, abundance and predators of juveniles

Cited by 110 publications

References 20 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

Variation in spawning and recruitment ofHaliotis iris(Mollusca: Gastropoda)

Microhabitat and associated biota of abalone juveniles, Haliotis fulgens and H. corrugata, in Bahía Tortugas, Baja California Sur, Mexico

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