Microbial management for bacterial pathogen control in invertebrate aquaculture hatcheries

Goulden, Evan F.; Høj, Lone; Hall, Michael R.

doi:10.1533/9780857097460.1.246

Cited by 11 publications

(12 citation statements)

References 195 publications

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“…The primary research issues for the development of a suitable hatchery technology for palinurid lobsters have recently been highlighted and discussed in major reviews (Goulden et al . ; Hall et al . ).…”

Section: Lobster Aquaculture: An Overviewmentioning

confidence: 98%

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

Francis

Salmon

Kenway

et al. 2013

Reviews in Aquaculture

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The closed-cycle rearing of palinurid lobsters in commercially relevant quantities currently represents one of the most difficult challenges facing modern-day aquaculture. The length and complexity of the larval life cycle exacerbate the problem, comprising the major bottleneck to their successful aquaculture. The general consensus is that developments in the key research area of nutrition will provide the necessary breakthroughs to make the closed-cycle rearing of lobster a reality. Due to the cryptic nature of feeding preferences and complex larval morphology, a commercially formulated feed for their culture does currently not exist. Nevertheless, there has been a wealth of research conducted to elucidate many of the unknowns concerning larval nutritional requirements. This review presents a synthesis of this information, ranging from investigations of larval morphology and feeding behaviour, hatchery nutrition practices, the elucidation of wild prey items and the nutritional content of wild-caught larval species. Based on the information available, this review culminates with a 'best guess' formulation for a larval spiny lobster diet, taking aspects concerning both the physical and chemical attributes of formulation into consideration. It is concluded that larval spiny lobsters are likely comparatively low in relation to other larval species with respect to their quantitative dietary requirements. Ultimately, the overall success of the larval cycle appears to be dictated by the stockpiling of lipids to fuel an energydemanding metamorphosis and a subsequent nonfeeding puerulus phase. These insights provide valuable direction for the formulation of nutritionally complete feeds to permit the closed-loop culture of spiny lobster species.

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Section: Lobster Aquaculture: An Overviewmentioning

confidence: 98%

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

Francis

Salmon

Kenway

et al. 2013

Reviews in Aquaculture

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“…In tilapia, L. garvieae infections are a cause of an emerging disease that became of major importance during the last decade [13,14]. Infections are most severe when water temperatures are above 20˚C [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Infections are most severe when water temperatures are above 20˚C [14,15]. Economic losses occur as a result of mortalities (high or low), downgrading of carcasses due to unsightly skin lesions and reduced growth rate [8,13,14]. No protective commercial vaccines for tilapia are available on the market at the moment.…”

Section: Introductionmentioning

confidence: 99%

A whole-cell Lactococcus garvieae autovaccine protects Nile tilapia against infection

et al. 2020

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The autovaccine was produced in-house using a bacterial isolate from a diseased fish from the target farm. Three groups of 150 fish each were injected with either 1) an oil-adjuvanted, inactivated whole cell autovaccine, 2) adjuvant only or 3) PBS (negative control). Approximately 660 degree days post vaccination, the fish were challenged with 9x10 5 cfu bacteria/ fish by intraperitoneal injection and monitored for a further 28 days. Protection against infections was measured by lack of/reduced bacterial loads both by bacterial re-isolation and immunohistochemistry as well as absence of clinical signs/pathology. Significantly less L. garvieae (p<0.03) was re-isolated from either the adjuvant only or control groups compared to the vaccinated group. Furthermore, a significantly high amount (p<0.001) of anti-L. garvieae specific antibodies were observed in the vaccinated group compared to the adjuvant only or control groups at time of challenge. This coincided with protection against infection measured by absence/reduced L. garvieae re-isolation from internal organs, reduced clinical signs and lack of pathology in this group. In the adjuvant only and control groups, bacteria were re-isolated from the kidney, liver, spleen, brain and eyes during the first 14 days. The findings suggest that oil-based vaccines can protect tilapia against L. garvieae infection through an antibody mediated response.

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“…found in gilthead seabream Sparus aurata L. to ampicillin, gentamicin, kanamycin and trimethoprim (Scarano et al., ). The bodies of larvae are environments that support bacterial attachment and growth (Goulden, Høj & Hall, ), and there is a strong possibility the gut of the larvae was also colonized with bacteria from the hatchery. European seabass larvae open their mouths around DAH 3, and after exposure to V. anguillarum on DAH 4 their swim bladder and gut are colonized 2 and 48 hr post exposure respectively (Rekecki et al., ).…”

Section: Discussionmentioning

confidence: 99%

Effects of antibiotic-induced differences in bacterial load on growth and shape of early larval European seabass (Dicentrarchus labraxL.)

et al. 2017

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The aim of the present study was to quantify the effects of antibiotic-induced differences in bacterial load on the size and shape of fish larvae, using Dicentrarchus labrax of day after hatching (DAH) 3 as a case study. They were split in two treatment groups and reared in 50 ml vials until DAH 14, with the control treatment ("NA") including larvae reared in filtered autoclaved seawater without antibiotics, while the second ("A") included larvae reared in filtered autoclaved seawater with rifampicin, ampicillin, kanamycin, trimethoprim and gentamicin, with a concentration of 10 mg/L each. They were sampled for bacterial presence on DAH 4, 7 and 14, and had their mortalities recorded, their total lengths, gut lengths, anal body depths, eye diameters, head depths, yolk sac lengths and yolk sac depths measured, and their outlines analysed on DAH 7 and 14. Treatment NA exhibited the highest mortalities on DAH 14. The antibiotics had a significant size effect, yielding larvae with larger total length on DAH 7 and 14, larger bodies on DAH 7, and on DAH 14 larger anal body depth and greater variance in body size. Their effect on outline shape was also significant in both age classes, with increasing differences from DAH 7 to DAH 14. On DAH 7, "A" specimens were more uniform in their dorso-ventral development, and on DAH 14 "NA" had more slender shapes. The beneficial total length and size effects and the witnessed shape effects might be associated with the low bacterial presence.

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Microbial management for bacterial pathogen control in invertebrate aquaculture hatcheries

Cited by 11 publications

References 195 publications

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

A whole-cell Lactococcus garvieae autovaccine protects Nile tilapia against infection

Effects of antibiotic-induced differences in bacterial load on growth and shape of early larval European seabass (Dicentrarchus labraxL.)

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