Investigating the Translocation and Seeding of Wild<i>Haliotis mariae</i>Wood, 1828, in the Sultanate of Oman

Waal, S. De; Balkhair, Mohammed; Al-Mashikhi, Ali; Khoom, Salem

doi:10.2983/035.032.0210

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Newly released juveniles can have poor behavioural responses towards predators since culture conditions lack the stimuli and environmental cues required to develop instinctive survival patterns that are essential for survival in the wild (Bell, ; Bell et al., ; Daniels & Watanabe, ; Poh et al., ). High mortality of transplanted or cultured juveniles presents a significant challenge and has the potential to impede the economic viability of ABE projects (Hart et al., ; McCormick, Herbinson, Mill & Altick, ; Waal et al., ). Laboratory experiments on cultured and wild red abalone, Haliotis rufescens, Swainson , on artificial reefs in California, USA, showed that wild individuals moved swiftly into concealed positions and suffered significantly lower predation rates by crustaceans and echinoderms than cultured individuals, who did not recognise the predatory threat and remained motionless in the same position (Schiel & Welden, ).…”

Section: Introductionmentioning

confidence: 99%

“…For example, artificial reefs in China combined with ABE have increased the production of the abalone Haliotis discus hannai, Ino (Wu et al, 2016). In addition, the translocation of wild abalone to restore severely depleted stocks following a heat shock event (Strain, Brown & Hart, in press), and abalone restocking have been used in various locations of the world, including Australia, the United States and Japan (Hamasaki & Kitada, 2008;Taylor et al, 2017;Waal, Balkhair, Al-Mashikhi & Khoom, 2013).…”

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Octopus as predators of abalone on a sea ranch

Greenwell

Loneragan

Admiraal

et al. 2019

Fisheries Management Eco

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This study examined the occurrence of octopus across an abalone, Haliotis laevigata, Donovan, sea ranch in south‐western Australia, to understand how octopus may be impacting abalone production. Commercial divers removed 654 octopus and 17,666 empty abalone shells during regular, 2 to 4‐weekly surveys over 27 months. A negative binomial generalised linear model estimated a 78% increase in empty shells per artificial abalone habitat per day, when octopuses were present, after adjusting for location and season. Of the 408 shells examined for evidence of predation, 19% had a small, slightly ovoid hole consistent with those made by octopus. The mean (± 1 SE) length of shells with boreholes (70.3 ± 2.2 mm) was significantly longer than those without (59.8 ± 0.5 mm), and boreholes were concentrated over the adductor, respiratory organs and heart. This study provides important insights into the adaptable feeding regimes of octopus and their potential to impose strong top‐down controls on sea ranching operations.

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Section: Introductionmentioning

confidence: 99%

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Octopus as predators of abalone on a sea ranch

Greenwell

Loneragan

Admiraal

et al. 2019

Fisheries Management Eco

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“…First, the fitness of cultured versus wild individuals might differ because of unintentional domestication (Araki and Schmid, 2010) or poor adaptation to local environmental conditions (for example, Waal et al, 2013). Second, the effective population size (Ne) of cultured stocks is commonly much lower than wild stocks, potentially leading to a depletion of the local genetic variability due to strong genetic drift.…”

Section: Introductionmentioning

confidence: 99%

Stock enhancement or sea ranching? Insights from monitoring the genetic diversity, relatedness and effective population size in a seeded great scallop population (Pecten maximus)

et al. 2016

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The mass release of hatchery-propagated stocks raises numerous questions concerning its efficiency in terms of local recruitment and effect on the genetic diversity of wild populations. A seeding program, consisting of mass release of hatchery-produced juveniles in the local naturally occurring population of great scallops (Pecten maximus L.), was initiated in the early 1980s in the Bay of Brest (France). The present study aims at evaluating whether this seeding program leads to actual population enhancement, with detectable effects on genetic diversity and effective population size, or consists of sea ranching with limited genetic consequences on the wild stock. To address this question, microsatellite-based genetic monitoring of three hatchery-born and naturally recruited populations was conducted over a 5-year period. Results showed a limited reduction in allelic richness but a strong alteration of allelic frequencies in hatchery populations, while genetic diversity appeared very stable over time in the wild populations. A temporal increase in relatedness was observed in both cultured stock and wild populations. Effective population size (Ne) estimates were low and variable in the wild population. Moreover, the application of the Ryman-Laikre model suggested a high contribution of hatchery-born scallops to the reproductive output of the wild population. Overall, the data suggest that the main objective of the seeding program, which is stock enhancement, is fulfilled. Moreover, gene flow from surrounding populations and/or the reproductive input of undetected sub-populations within the bay may buffer the Ryman-Laikre effect and ensure the retention of the local genetic variability.

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“…Although there is clear evidence that these biogeographic breaks may apply to taxonomic groups other than fish, such as habitatforming corals (Claereboudt, 2019;Salm, 1993), macroalgae (Schils & Wilson, 2006), and a suite of other marine invertebrates (e.g., Omani abalone, Haliotis mariae; Waal et al, 2013), these regional differences have yet to be formally tested across multiple trophic levels due to the challenges of comprehensively surveying marine communities across this coastline.…”

Section: Introductionmentioning

confidence: 99%