Successful seeding of hatchery-produced juvenile greenlip abalone to restore wild stocks

Dixon, Cameron; Day, Robert W.; Huchette, Sylvain; Shepherd, S.A.

doi:10.1016/j.fishres.2005.11.023

Cited by 41 publications

(44 citation statements)

References 17 publications

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“…A zero survival after 130 days from the date of release was reported by Isa et al (1997) for juveniles measuring 8-16 mm. Dixon et al (2006) reported lower survival probabilities (0-0.57) for 18 mm hatchery-produced green lip abalone Haliotis laevigata nine months after the release. The mean survival probabilities (0.81 and 0.92) of large trochus from Sites 1-3 corroborate with the annual survival probabilities (0.925) obtained from recovery of dead shells in tagging experiments (see Nash, 1993).…”

Section: Reviews In Fisheriesmentioning

confidence: 94%

Translocation of WildTrochus niloticus: Prospects for Enhancing Depleted Philippine Reefs

Dolorosa¹,

Grant²,

Gill³

2013

Reviews in Fisheries Science

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Intentional release of wild-caught individuals has been widely used to establish new populations of the commercially valuable but threatened reef gastropod Trochus niloticus in oceanic islands. Is this also a viable strategy to enhance depleted populations of this species and other marine invertebrates? We monitored growth and survival of 765 translocated individuals and 486 in their original habitat for 5-9 months. Individuals translocated to a severely overexploited reef (mainland Palawan) grew 2-3 times faster than those at Tubbataha Reefs Natural Park, Phillipines. Despite variations in growth between the three sites, survival probabilities were consistently high, ranging between 0.77 and 0.92. So translocation is feasible, and sites at which a species has previously been found are likely to be suitable for their growth and survival. If site management can control over-fishing, this approach is likely to be a valuable tool for enhancing field populations of a large invertebrates like Trochus that have a short lived planktonic larva.

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Section: Reviews In Fisheriesmentioning

confidence: 94%

Translocation of WildTrochus niloticus: Prospects for Enhancing Depleted Philippine Reefs

Dolorosa¹,

Grant²,

Gill³

2013

Reviews in Fisheries Science

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“…Analysis of growth and survival of hatcheryreared animals have been the most common objectives [21,23,24] with particular emphasis on development of techniques for breeding and marking of hatchery reared animals [25]. Genetic evaluations have been undertaken [26,27] and investigations into habitat and ecological effects are well represented [28][29][30][31].…”

Section: Enhancement Of Commercial Invertebrate Fisheries In Australiamentioning

confidence: 99%

“…First, the work of Tasmanian researchers on southern rock lobster [23,33,38,40] led to an annual commercial scale translocation of lobsters from slow to fast-growing areas, funded by individual transferable quota (ITQ) holders, which resulted in an additional 50 t catch per annum [20]. Second, the work of abalone researchers [24,34,53] led to a significant attempt at commercialisation in Western Australia on greenlip abalone (Haliotis laevigata) in 2011/12. This attempt eventually failed due to the negative interaction between the aquaculture and wild fisheries sectors, particularly in the area of disease risk.…”

Section: Enhancement Of Commercial Invertebrate Fisheries In Australiamentioning

confidence: 99%

“…Evidence for a likely change in population productivity of H. laevigata under commercial scale enhancement is available from comparisons of natural recruitment versus assisted recruitment from long-term enhancement experiments [24,29,34,53,68]. These studies showed that it was possible to increase recruitment in a controlled manner across multiple replicated experiments (n 450).…”

Section: Bridging the Inequality (2): The Haliotis Laevigata Abalone mentioning

confidence: 99%

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Commercial scale invertebrate fisheries enhancement in Australia: Experiences, challenges and opportunities

Hart

2015

Marine Policy

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“…Several species of abalone (Haliotis spp.) have been the subject of previous experimental outplanting for both economic and conservation purposes (Dixon et al 2006;Roberts 2003;Hamasaki and Kitada 2008). These studies have shown that hatchery-reared juveniles may experience high levels of predation once they are outplanted due to a number of factors including a lack of camouflage, behavioural and genetic differences, densitydependent mortality and a functional response of predators to high densities of prey (Schiel and Welden 1987;Gaffney et al1996;Shepherd et al 2000;Tegner 2000).…”

Section: Introductionmentioning

confidence: 99%

Using molecular pedigree reconstruction to evaluate the long-term survival of outplanted hatchery-reared larval and juvenile northern abalone (Haliotis kamtschatkana)

et al. 2012

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The restoration of abalone (Haliotis spp.) populations through supplementation with the offspring of hatchery-spawned wild parents has been attempted in several species, with variable results. Between 2002 and 2005, the Bamfield Huu-ay-aht Community Abalone Project released 4.5 million larvae and 152,000 juveniles of the northern abalone (Haliotis kamtschatkana) into Barkley Sound, BC. The purpose of this study was to estimate the long-term survival of outplanted abalone 3-7 years after their release and thus determine their contribution to local population densities at three different outplanting sites. We identified outplanted abalone by genotyping epipodal tentacles sampled from wild-caught abalone for seven microsatellite loci. We then used three different pedigree reconstruction programs: one that used genotypes from hatchery-reared siblings (PEDIGREE 2.2), one that used the wild parent genotypes that were available (CERVUS 3.0), and one that used both sources of information (COLONY 2.0). Each program identified different but partially overlapping subsets of hatchery-outplanted offspring. From this we inferred that up to 26% of the individuals sampled at the main outplanting site were from hatchery spawnings. Despite this large contribution of hatchery-reared stock, the density of mature abalone at each site was below the level required for successful fertilization. More intensive outplanting efforts might increase population densities of this broadcast spawner above this minimum sustainable level. However, for supplementation to be successful, other factors that could reduce outplanted juvenile survival, including the low genetic diversity of hatchery-produced offspring and the low habitat quality of some outplanting sites, need to be monitored.

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Successful seeding of hatchery-produced juvenile greenlip abalone to restore wild stocks

Cited by 41 publications

References 17 publications

Translocation of WildTrochus niloticus: Prospects for Enhancing Depleted Philippine Reefs

Translocation of WildTrochus niloticus: Prospects for Enhancing Depleted Philippine Reefs

Commercial scale invertebrate fisheries enhancement in Australia: Experiences, challenges and opportunities

Using molecular pedigree reconstruction to evaluate the long-term survival of outplanted hatchery-reared larval and juvenile northern abalone (Haliotis kamtschatkana)

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