Rotifers enriched with taurine by microparticulate and dissolved enrichment methods influence the growth and metamorphic development of northern rock sole (Lepidopsetta polyxystra) larvae

“…Larval development was scored by the degree of observed tail flexion using the criteria established by Hawkyard et al . (): Stage 0 – straight notochord (no flexion); Stage 1 – straight notochord with the appearance of a caudal peduncle ‘node’ near the posterior end; Stage 2 – bent notochord with caudal peduncle formation near the posterior end; Stage 3 – bent notochord and initial envelopment of the notochord by the caudal peduncle i.e., the notochord did not protrude beyond the caudal peduncle; and Stage 4 – full envelopment of the notochord by the caudal peduncle with only a remnant of the bent notochord still visible.…”

Section: Methodsmentioning

confidence: 99%

The effects of temperature on growth, development and settlement of northern rock sole larvae (Lepidopsetta polyxystra)

Laurel

Danley²,

Haines

2014

Fisheries Oceanography

View full text Add to dashboard Cite

Northern rock sole (Lepidopsetta polyxystra) is a commercially important fish in the North Pacific and a focal species in understanding larval transport to nursery grounds in the Bering Sea. However, the temperature‐dependent vital rates and settlement dynamics for this species have not been described in detail. We reared northern rock sole larvae in the laboratory to measure growth, condition, development and settlement parameters across four temperatures (2, 4, 7 and 10°C). Both length and mass‐measured growth rates increased with temperature and were best described by non‐linear regression. Residuals of the length–mass relationships were positively related to temperature, indicating larval condition also increased with temperature. Larval development and settlement were largely size dependent, resulting in reduced larval stage duration and earlier settlement at higher temperatures owing to more rapid growth at elevated temperatures. However, larvae at colder temperatures were less developed at a given size, but more likely to settle at smaller sizes than larvae reared in warmer conditions. These temperature–response parameters can be used to refine current and future transport models for northern rock sole larvae under changing environmental conditions in the North Pacific.

show abstract

“…Efficiency of delivery can be markedly improved by encapsulating the nutrient in hydrophobic carriers such as wax spray beads before being added to the enrichment of live prey such as rotifers and Artemia (Hawkyard et al, 2011;Langdon et al, 2008). Doing so allowed Hawkyard et al (2014) to reduce by 80-times the amount of taurine required to achieve the same level of live prey enrichment compared to a traditional enrichment bath method, while maintaining larval growth and…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Taurine: a critical nutrient for future fish feeds

2015

View full text Add to dashboard Cite

Taurine is a sulfonic acid found in high concentrations in animal tissues. In recent years, a number of studies have demonstrated the essentiality of dietary taurine for many commercially relevant species, especially marine teleosts. Consequently, the removal of taurine-rich dietary ingredients such as fishmeal may create a deficiency, of which symptoms include reduced growth and survival, increased susceptibility to diseases, and impaired larval development. These symptoms emphasize the systemic role of taurine in the animal's physiology and provide few clues as to the underlying mechanisms of taurine function. In fact, a myriad of roles have been attributed to taurine in mammals, ranging from bile salt conjugation to membrane stabilization, osmoregulation, anti-oxidation, immunomodulation, calcium-signaling, and neuroprotection. This review describes the current knowledge of taurine physiology and metabolism in fish and requirement levels in relevant species, and highlights possible parallels with mammalian taurine metabolism. In addition, the effects of ingredient processing and feed manufacturing on taurine bioavailability are discussed. Finally, regulatory aspects are brought to the forefront: although the supplementation of taurine will be necessary to further reduce the use of ingredients such as fishmeal, taurine is not currently approved by the FDA in the USA for fish feeds.Obtaining approval in the United States to utilize taurine in fish feeds can improve the environmental and economic sustainability of fish feeds nation-wide.

show abstract

Rotifers enriched with taurine by microparticulate and dissolved enrichment methods influence the growth and metamorphic development of northern rock sole (Lepidopsetta polyxystra) larvae

Cited by 30 publications

References 25 publications

High-glucose feeding of gilthead seabream (Sparus aurata) larvae: Effects on molecular and metabolic pathways

High-glucose feeding of gilthead seabream (Sparus aurata) larvae: Effects on molecular and metabolic pathways

The effects of temperature on growth, development and settlement of northern rock sole larvae (Lepidopsetta polyxystra)

Taurine: a critical nutrient for future fish feeds

Contact Info

Product

Resources

About