Effects of temperature on the moulting and locomotory activity of hatchery-reared juvenile lobsters (<i>Homarus gammarus</i>) at Helgoland (North Sea)

Schmalenbach, Isabel; Búchholz, Friedrich

doi:10.1080/17451000.2012.727433

Cited by 10 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Homarus gammarus in some lobster reserves in Norwegian waters experienced sea temperatures ranging from 2°C during late winter (February to March) to 18°C during late summer (August to September) with seasonal variations in lobster activity levels being correlated to water temperature (Moland et al, 2011). Lobster juvenile moulting and locomotory activity is optimal at temperatures of between 12-14 ºC (Schmalenbach and Buchholz, 2013) and a similar range of temperatures was observed in this study for the Hebrides and Southeast in autumn throughout the studied period. Koeller (1999) argued that at intermediate scales, catches alone do not accurately reflect changes in lobster abundance.…”

Section: Discussionsupporting

confidence: 80%

Scottish lobster fisheries and environmental variability

Lizárraga-Cubedo

Tuck

Bailey

et al. 2015

ICES Journal of Marine Science

View full text Add to dashboard Cite

Variability in the fluctuations of two Scottish lobster populations, the Hebrides and Southeast, was investigated from available long dataseries of fishery and environmental variables. In a multivariate context, relationships between selected environmental variables and the fishery data were studied at different spatial and temporal (annual, spring, and autumn) scales and from individual and overall sampled fleet. Multivariate techniques such as cross-correlation function, principal components analysis, and redundancy analysis confirmed that the capture of lobsters was strongly influenced by sea surface temperature, windspeed, and sea level pressure throughout the year, and this dependence affected the duration of the fishery. There were evident differences in the patterns of environmental variables for both regions. In the Hebrides, the total variation (42%) of the interaction fishery-environmental variables for spring and autumn fisheries could be attributed to the environmental variables in an 89%. For the Southeast, spring fishery was more affected by changes in the environment, with a total variation of 34%, from which 85% could be explained by the environmental variables tested, than autumn fishery where catches and catch rates may be more affected by the way individual vessel and sampled fleet operate. Two elements were identified, Hebrides and Southeast spring and autumn fisheries. The Hebrides lobster population is strongly influenced by density-independence processes at all spatial scales. The Southeast fishery is also driven by environmental processes, with higher correlations for recruits with differences at small and large spatial scales.

show abstract

Section: Discussionsupporting

confidence: 80%

Scottish lobster fisheries and environmental variability

Lizárraga-Cubedo

Tuck

Bailey

et al. 2015

ICES Journal of Marine Science

View full text Add to dashboard Cite

show abstract

“…This may also have influenced larval growth as the species appears to be more active and forage during darkness. H. gammarus larvae hatch overnight and wild zoea perform diel vertical migration (DVM) and become negatively phototactic as they develop (Middlemiss et al., ; Tully & Ó Céidigh, ), whilst in captivity, young PL are more active during darkness (Schmalenbach & Buchholz, ). H. americanus larval and PL rearing experiments have also shown that short light duration improves survival and increases feeding (reviewed by Aiken & Waddy, ; Haché, Mallet and Dumas ().…”

Section: Discussionmentioning

confidence: 99%

Comparative survival and growth performance of European lobster larvae,Homarus gammarus, reared on dry feed and conspecifics

et al. 2017

View full text Add to dashboard Cite

A bottleneck of crustacean larval culture concerns nutrition and associated cannibalism in communal rearing systems, which impact on larval survival, development and growth. For early‐stage European lobster, Homarus gammarus larvae, feeding ecology and body composition are largely unknown. We initiated four progressive feeding experiments (novel feed types, feeding regime and feed size and cannibalism effects) on growth and survival, to inform and update husbandry protocols. Performance of larvae offered a dry commercial feed was not significantly different compared with a conventional wet plankton feed of the same ration and size grade (both within 600–1,000 μm). Further experiments found that the same ration of dry feed offered six times daily improved development and growth, over the conventional regime of three times daily. Small‐grade dry feed (particles: 250–360 μm) improved larval performance compared with a larger feed (360–650 μm). Larvae were also fed different proportions of dry feed and/or conspecifics in both communal and individual rearing systems (the latter preventing cannibalism via segregation). Individually reared larvae, fed only dead conspecifics, displayed the greatest survival (80%) to postlarvae. This underlines the impact of cannibalism on survival and nutrition in H. gammarus larviculture. A final experiment analysed H. gammarus zoea 1 composition, identifying deficiencies in ash and carbohydrate in lobster feeds. This suggests a need for a species‐specific, formulated dry feed for H. gammarus larviculture. Our research represents the first investigation of H. gammarus larval composition and dietary requirements and highlights decreased growth potential associated with providing nutrition solely from generic commercial feed.

show abstract

“…This highlights the potential for SBCC based technology and suggests that other environmental factors are playing a significant role, it also highlights the current technological deficiencies of rearing systems utilised in RAS based operations. Other biological, physical and chemical environmental parameters are likely to be important (Burton, 2003;Hartnoll, 2001;Schmalenbach and Buchholz, 2013;Templeman, 1936), including light levels (Eagles et al, 1986;Templeman, 1936), flow rates (Smith et al, 1998(Smith et al, , 1999 and plankton supply (SAHFOS, Sir Alister Hardy foundation for Ocean Science, 2015).…”

Section: Discussionmentioning

confidence: 99%