scholarly journals Effect of CO<sub>2</sub>-related acidification on aspects of the larval development of the European lobster, <i>Homarus gammarus</i> (L.)

2009 ◽  
Vol 6 (2) ◽  
pp. 3087-3107 ◽  
Author(s):  
K. E. Arnold ◽  
H. S. Findlay ◽  
J. I. Spicer ◽  
C. L. Daniels ◽  
D. Boothroyd
Keyword(s):  
Larval Development ◽  
Carapace Length ◽  
Sea Water ◽  
Marine Ecosystem ◽  
Early Life History ◽  
Magnesium Content ◽  
Marine Animals ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Larval Stages

Abstract. Oceanic uptake of anthropogenic CO2 results in a reduction in pH termed "Ocean Acidification" (OA). Comparatively little attention has been given to the effect of OA on the early life history stages of marine animals. Consequently, we investigated the effect of culture in CO2-acidified sea water (approx. 1200 ppm, i.e. average values predicted using IPCC 2007 A1F1 emissions scenarios for year 2100) on early larval stages of an economically important crustacean, the European lobster Homarus gammarus. Culture in CO2-acidified sea water did not significantly affect carapace length or development of H. gammarus. However, there was a reduction in carapace mass during the final stage of larval development in CO2-acidified sea water. This co-occurred with a reduction in exoskeletal mineral (calcium and magnesium) content of the carapace. As the control and high CO2 treatments were not undersaturated with respect to any of the calcium carbonate polymorphs measured, the physiological alterations we record are most likely the result of acidosis or hypercapnia interfering with normal homeostatic function, and not a direct impact on the carbonate supply-side of calcification per se. Thus despite there being no observed effect on survival, carapace length, or zoeal progression, OA related (indirect) disruption of calcification and carapace mass might still adversely affect the competitive fitness and recruitment success of larval lobsters with serious consequences for population dynamics and marine ecosystem function.

scholarly journals Effect of CO<sub>2</sub>-related acidification on aspects of the larval development of the European lobster, <i>Homarus gammarus</i> (L.)

2009 ◽  
Vol 6 (8) ◽  
pp. 1747-1754 ◽  
Author(s):  
K. E. Arnold ◽  
H. S. Findlay ◽  
J. I. Spicer ◽  
C. L. Daniels ◽  
D. Boothroyd
Keyword(s):  
Larval Development ◽  
Carapace Length ◽  
Sea Water ◽  
Marine Ecosystem ◽  
Early Life History ◽  
Magnesium Content ◽  
Marine Animals ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Larval Stages

Abstract. Oceanic uptake of anthropogenic CO2 results in a reduction in pH termed "Ocean Acidification" (OA). Comparatively little attention has been given to the effect of OA on the early life history stages of marine animals. Consequently, we investigated the effect of culture in CO2-acidified sea water (approx. 1200 ppm, i.e. average values predicted using IPCC 2007 A1F1 emissions scenarios for year 2100) on early larval stages of an economically important crustacean, the European lobster Homarus gammarus. Culture in CO2-acidified sea water did not significantly affect carapace length of H. gammarus. However, there was a reduction in carapace mass during the final stage of larval development in CO2-acidified sea water. This co-occurred with a reduction in exoskeletal mineral (calcium and magnesium) content of the carapace. As the control and high CO2 treatments were not undersaturated with respect to any of the calcium carbonate polymorphs measured, the physiological alterations we record are most likely the result of acidosis or hypercapnia interfering with normal homeostatic function, and not a direct impact on the carbonate supply-side of calcification per se. Thus despite there being no observed effect on survival, carapace length, or zoeal progression, OA related (indirect) disruption of calcification and carapace mass might still adversely affect the competitive fitness and recruitment success of larval lobsters with serious consequences for population dynamics and marine ecosystem function.

scholarly journals Immunolocalization of NA+,K+-ATPase in the Branchial Cavity During the Early Development of the European Lobster Homarus Gammarus (Crustacea, Decapoda)

2001 ◽  
Vol 49 (8) ◽  
pp. 1013-1023 ◽  
Author(s):  
Jean-Hervé Lignot ◽  
Guy Charmantier
Keyword(s):  
Electron Microscopy ◽  
Immunogold Electron Microscopy ◽  
Α Subunit ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Larval Stages ◽  
Transmission Electron ◽  
Branchial Cavity ◽  
Enzyme Location ◽  
Ion Pumping

We examined the ontogeny of the osmoregulatory sites of the branchial cavity in embryonic and early postembryonic stages of the European lobster Homarus gammarus through transmission electron microscopy, immunofluorescence microscopy, and immunogold electron microscopy using a monoclonal antibody IgGα5 raised against the avian α-subunit of the Na+,K+-ATPase. In mid-late embryos, Na+,K+-ATPase was located along the pleurites and within the epipodite buds. In late embryos just before hatching, the enzyme was confined to the epipodite epithelia. After hatching, slight differentiations of ionocytes occured in the epipodites of larval stages. Na+,K+-ATPase was also located in the ionocytes of the epipodites of larvae exposed to seawater (35.0‰) and to dilute seawater (22.1 ‰). After metamorphosis, the inner-side branchiostegite epithelium appeared as an additional site of enzyme location in postlarvae held in dilute seawater. Within the ionocytes, Na+,K+-ATP-ase was mostly located along the basolateral infoldings. These observations are discussed in relation to the physiological shift from osmoconforming larvae to slightly hyper-regulating (in dilute seawater) postmetamorphic stages. The acquisition of the ability to hyper-osmo-regulate probably originates from the differentiation, on the epipodites and mainly along the branchiostegites, of ionocytes that are the site of ion pumping as evidenced by the location of Na+,K+-ATPase. (J Histochem Cytochem 49:1013–1023, 2001)

Corrigendum to: Video-surveillance system for remote long-term in situ observations: recording diel cavity use and behaviour of wild European lobsters (Homarus gammarus)

2015 ◽  
Vol 66 (4) ◽  
pp. 385
Author(s):  
Ronny Steen ◽  
Sondre Ski
Keyword(s):  
Video Surveillance ◽  
Surveillance System ◽  
Video Recording ◽  
Published Data ◽  
Video Surveillance System ◽  
Marine Animals ◽  
European Lobster ◽  
Homarus Gammarus ◽  
In The Wild

Long-term studies of subtidal marine animals in the wild are a demanding enterprise. Traditionally, data collection has been limited to direct observations during SCUBA diving. In the past decade, video technology has improved rapidly and behavioural monitoring of marine organisms has successfully been conducted by using modern video-recording equipment. Here, we describe a video-monitoring system that employs video motion detection (VMD) and describe its use with the European lobster (Homarus gammarus). There is a shortage of detailed information on lobster behaviour in the wild, with virtually no published data on the fine-scale behaviour of the European lobster under natural conditions. This dearth of information reflects the difficulties in observing behaviour in nocturnal marine animals. Here, we explore whether a remote video-surveillance system is suitable for long-term monitoring of European lobsters inhabiting an artificial cavity in a natural habitat. From the video recordings, we were able to register diel cavity use and categorise behavioural elements such as resting, feeding, burrowing and substrate moving, self-cleaning, burrow occupancy and interactions among individuals. We propose that this novel system will contribute to more efficient data sampling of lobsters and facilitate non-invasive, long-term behavioural studies of other marine and freshwater animals.

scholarly journals Modelling seasonal and annual variation in size at functional maturity in the European lobster (Homarus gammarus) from self-sampling data

2009 ◽  
Vol 66 (9) ◽  
pp. 1892-1898 ◽  
Author(s):  
Martial Laurans ◽  
Spyros Fifas ◽  
Sébastien Demaneche ◽  
Stéphane Brérette ◽  
Olivier Debec
Keyword(s):  
Body Size ◽  
Sex Ratio ◽  
Carapace Length ◽  
Annual Variation ◽  
Logistic Function ◽  
Sampled Data ◽  
Functional Maturity ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Northern European

Abstract Laurans, M., Fifas, S., Demaneche, S., Brérette, S., and Debec, O. 2009. Modelling seasonal and annual variation in size at functional maturity in the European lobster (Homarus gammarus) from self-sampling data. – ICES Journal of Marine Science, 66: 1892–1898. Fishers from Le Croisic (France) measure all the lobsters (Homarus gammarus) they capture, indicating their sex and whether the females are ovigerous or non-ovigerous. Between 2003 and 2006 and mainly between April and September, 16 884 lobsters were measured in this manner. These self-sampled data were used to study catchability and functional maturity of lobsters. The sex ratio was 50%, and catchability did not change if a female was ovigerous or non-ovigerous. With the help of a logistic function, a relationship was established between body size and the proportion of ovigerous females. For the study area, 100% of the females were mature upon reaching a carapace length (CL) of 115 mm, and the proportion of ovigerous females reached 70% each year. The L50 value evolved over a CL of 103–106 mm. From the size when 100% of the females matured (115 mm), there was a larger proportion of ovigerous females than in other studies carried out in more northern European areas.

On the occurrence of juvenile lobster Homarus gammarus in intertidal habitat

2000 ◽  
Vol 80 (2) ◽  
pp. 375-376 ◽  
Author(s):  
Adrian Linnane ◽  
Brendan Ball ◽  
Brian Munday ◽  
John P. Mercer
Keyword(s):  
Carapace Length ◽  
Intertidal Habitat ◽  
Red Sandstone ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Lobster Fishery

The early benthic phase (EBP) European lobster Homarus gammarus, and the habitat to which it recruits, remains largely undiscovered. Following reports that juvenile lobsters were being located within an intertidal lobster fishery in Johnshaven, Scotland, a three day census was undertaken. The shore consisted of a wave cut platform with a red sandstone/cobble conglomerate substratum. Three juvenile lobsters of 28, 32 and 45 mm carapace length (CL) were located in a crevice type habitat. It is hypothesized that in some areas of coastline, intertidal crevices act as a peripheral habitat for juvenile lobsters.

scholarly journals Deformities in larvae and juvenile European lobster (<i>Homarus gammarus</i>) exposed to lower pH at two different temperatures

2013 ◽  
Vol 10 (5) ◽  
pp. 7579-7615 ◽  
Author(s):  
A.-L. Agnalt ◽  
E. S. Grefsrud ◽  
E. Farestveit ◽  
M. Larsen ◽  
F. Keulder
Keyword(s):  
Ocean Acidification ◽  
Synergistic Effects ◽  
Dry Weight ◽  
High Pco2 ◽  
Ambient Water ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Larval Stages ◽  
Stage 1

Abstract. Trends of increasing temperatures and ocean acidification are expected to influence benthic marine resources, especially calcifying organisms. The European lobster (Homarus gammarus) is among those species at risk. A project was initiated in 2011 aiming to investigate long-term synergistic effects of temperature and projected increases in ocean acidification on the life cycle of lobster. Larvae were exposed to pCO2 levels of ambient water (water intake at 90 m depth, tentatively of 380 μatm pCO2), 727 and 1217 μatm pCO2, at temperatures 10 and 18 °C. Long-term exposure lasted until 5 months of age. Thereafter the surviving juveniles were transferred to ambient water at 14 °C. At 18 °C the development from Stage 1 to 4 lasted from 14 to 16 days, as predicted under normal pH values. Growth was very slow at 10 °C and resulted in only two larvae reaching Stage 4 in the ambient treatment. There were no significant differences in carapace length at the various larval stages between the different treatments, but there were differences in total length and dry weight at Stage 1 at 10 °C, Stage 2 at both temperatures, producing larvae slightly larger in size and lighter by dry weight in the exposed treatments. Stage 3 larvae raised in 18 °C and 1217 μatm pCO2 were also larger in size and heavier by dry weight compared with 727 μatm. Unfortunate circumstances precluded a full comparison across stages and treatment. Deformities were however observed in both larvae and juveniles. At 10 °C, about 20% of the larvae exposed to elevated pCO2were deformed, compared with 0% in larvae raised in pH above 8.0. At 18 °C and in high pCO2 treatment, 31.5% of the larvae were deformed. Occurrence of deformities after 5 months of exposure was 33 and 44% in juveniles raised in ambient and low pCO2, respectively, and 20% in juveniles exposed to high pCO2. Some of the deformities will possibly affect the ability to find food, sexual partner (walking legs, claw and antenna), respiration (carapace), and ability to swim (tail-fan damages).

Video-surveillance system for remote long-term in situ observations: recording diel cavity use and behaviour of wild European lobsters (Homarus gammarus)

2014 ◽  
Vol 65 (12) ◽  
pp. 1094 ◽  
Author(s):  
Ronny Steen ◽  
Sondre Ski
Keyword(s):  
Video Surveillance ◽  
Surveillance System ◽  
Video Recording ◽  
Published Data ◽  
Video Surveillance System ◽  
Marine Animals ◽  
European Lobster ◽  
Homarus Gammarus ◽  
In The Wild

Long-term studies of subtidal marine animals in the wild are a demanding enterprise. Traditionally, data collection has been limited to direct observations during SCUBA diving. In the past decade, video technology has improved rapidly and behavioural monitoring of marine organisms has successfully been conducted by using modern video-recording equipment. Here, we describe a video-monitoring system that employs video motion detection (VMD) and describe its use with the European lobster (Homarus gammarus). There is a shortage of detailed information on lobster behaviour in the wild, with virtually no published data on the fine-scale behaviour of the European lobster under natural conditions. This dearth of information reflects the difficulties in observing behaviour in nocturnal marine animals. Here, we explore whether a remote video-surveillance system is suitable for long-term monitoring of European lobsters inhabiting an artificial cavity in a natural habitat. From the video recordings, we were able to register diel cavity use and categorise behavioural elements such as resting, feeding, burrowing and substrate moving, self-cleaning, burrow occupancy and interactions among individuals. We propose that this novel system will contribute to more efficient data sampling of lobsters and facilitate non-invasive, long-term behavioural studies of other marine and freshwater animals.

scholarly journals The Carotenoproteins During Embryogenesis and Larval Development of the European Lobster Homarus Gammarus

2004 ◽  
Vol 24 (4) ◽  
pp. 592-602 ◽  
Author(s):  
Desy M. H. Mantiri ◽  
Geneviève Nègre-Sadargues ◽  
René Castillo ◽  
Jose-Carlos G. Milicua
Keyword(s):  
Larval Development ◽  
European Lobster ◽  
Homarus Gammarus
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