Effect of brine-shrimp numbers on growth and survival of early-stage phyllosoma larvae of the rock lobster Jasus edwardsii

1997 ◽  
Vol 48 (8) ◽  
pp. 935 ◽  
Author(s):  
Lennard J. Tong ◽  
Graeme A. Moss ◽  
Megan M. Paewai ◽  
Timothy D. Pickering
Keyword(s):  
Large Scale ◽  
Early Stage ◽  
Artemia Salina ◽  
Fixed Number ◽  
Rock Lobster ◽  
Growth And Survival ◽  
Brine Shrimps ◽  
Jasus Edwardsii ◽  
Large Scale Culture ◽  
Phyllosoma Larvae

Stages I to VI phyllosoma larvae of the rock lobster Jasus edwardsii were fed daily with a fixed number (1, 2, 4, 8, 12 or 16) of 2–3 mm brine shrimps (Artemia salina) to determine the optimum requirement for growth and survival. For stages I and II the threshold below which food became limiting, measured as a significant delay in moulting, was <2 brine shrimps per day. For stage III the threshold was 4 brine shrimps per day, for stages IV and V it was 8 brine shrimps per day and for stage VI, 12 brine shrimps per day. Growth at the moult was reduced when food was limiting. The feeding rate reduced immediately before the moult and this was most evident for stages V and VI. The results are discussed in relation to large scale culture of phyllosoma larvae.

Effects of light intensity and food density on the growth and survival of early-stage phyllosoma larvae of the rock lobster Jasus edwardsii

1999 ◽  
Vol 50 (2) ◽  
pp. 129 ◽  
Author(s):  
Graeme A. Moss ◽  
Lennard J. Tong ◽  
John Illingworth
Keyword(s):  
Light Intensity ◽  
Prey Density ◽  
Stage I ◽  
Food Density ◽  
Rock Lobster ◽  
Individual Stage ◽  
Growth And Survival ◽  
Brine Shrimps ◽  
Jasus Edwardsii ◽  
Phyllosoma Larvae

Individual Stage I, III and V phyllosomas of the rock lobster Jasus edwardsii were fed daily with a fixed number (2, 4, 8, 12 or 16) of brine shrimps (Artemia salina, 2–3 mm long) under four different continuous light intensities (10, 0.1, 0.001 and ≤0.0002 µmol s-1 m-2) to determine the optimum requirement for growth and survival. Phyllosomas of each stage fed higher rations of brine shrimps had a significantly shorter intermoult period and larger post-moult size. Light intensity had a significant effect on the post-moult size of Stage I phyllosomas but had no effect on the intermoult period. Individual Stage I, III and V phyllosomas were also fed daily with fixed numbers (2, 4 and 8 respectively) of brine shrimps in containers with different volumes (10, 20, 40, 60, 80, 120 and 240 mL) to alter the prey density while maintaining prey numbers. Prey density had no significant effect on intermoult period or post-moult size but did affect consumption rates. The results are discussed in relation to large-scale culture of phyllosoma larvae.

Residency and movement dynamics of southern rock lobster (Jasus edwardsii) after a translocation event

2015 ◽  
Vol 66 (7) ◽  
pp. 623 ◽  
Author(s):  
Adrian Linnane ◽  
Shane Penny ◽  
Peter Hawthorne ◽  
Matthew Hoare
Keyword(s):  
Large Scale ◽  
South Australia ◽  
Rock Lobster ◽  
Directed Movement ◽  
Translocation Event ◽  
South West ◽  
Movement Dynamics ◽  
Close Proximity ◽  
Jasus Edwardsii ◽  
Almost All

Previous movement studies on the southern rock lobster (Jasus edwardsii) have all involved releasing tagged animals at the point of capture. In 2007, 5298 lobsters, in total, were tagged and translocated from an offshore site (>100-m depth) to two inshore sites (<20-m depth) in South Australia. After a period of 735 days, 510 (9.6%) had been recaptured. The majority of translocated lobsters were located within close proximity to the release points, with 306 (60%) having moved <5km. Of the remainder, 133 (26%) were recaptured within 5–10km, with a further 71 (14%) individuals having moved >10km. Movement patterns were highly directional in nature, with individuals consistently travelling in a south-west bearing, regardless of distance moved. In almost all cases, movement was from inshore to offshore sites, with female lobsters travelling significantly further (mean 5.66km ±6.41s.d.) than males (mean 5.02km ±9.66s.d.). The results are consistent with previous large-scale tagging studies of J. edwardsii, which indicated high residency levels but with occasional directed movement by some individuals.

Feeding activity and the morphology of the digestive tract in stage-I phyllosoma larvae of the rock lobster Jasus edwardsii

1997 ◽  
Vol 48 (1) ◽  
pp. 19 ◽  
Author(s):  
David L. Macmillan ◽  
Shaun L. Sandow ◽  
David M. Wikeley ◽  
Stewart Frusher
Keyword(s):  
Digestive Tract ◽  
Electron Micrographs ◽  
Sea Water ◽  
Feeding Activity ◽  
Petri Dish ◽  
Scanning Electron Micrographs ◽  
Rock Lobster ◽  
Jasus Edwardsii ◽  
Phyllosoma Larvae ◽  
Latris Lineata

First-stage phyllosoma larvae of the rock lobster Jasus edwardsii attached to and fed on larvae of the Tasmanian trumpeter fish, Latris lineata, when the two were placed together in an aerated, through-circulating, sea-water aquarium. Scanning electron micrographs of the mouthparts showed adaptations suitable for scraping and cutting soft substrata. Phyllosomas removed from the fish while feeding had pigment particles from the fish integument throughout their digestive tracts. The behaviour of these phyllosomas, swimming in a Petri dish, was recorded with a microscope and video system. The presence of the pigment particles made it possible to see the lumen of the gut diverticulae and parts of them undergoing regular contractions. Transmission electron micrographs of the gut showed that the parts of the gut that contracted in the video records have well developed muscle bands associated with them. The ultrastructure of the digestive tract is relatively uniform throughout and is lined by cells resembling the undifferentiated (E) cells of other scyllarid and palinurid larvae. Extensive folding of the wall, together with a brush border on the digestive cells, results in a large surface area for absorption. There is no grinding or filtering apparatus in the digestive tract. The behaviour of the phyllosoma, structure of the mouthparts, and ultrastructure of the digestive tract, suggest that the first-stage phyllosoma of J. edwardsii is adapted for removing soft tissue from gelatinous organisms and pumping it around the digestive tract.

Mouthpart and foregut ontogeny in phyllosoma larvae of the spiny lobster Jasus edwardsii (Decapoda: Palinuridae)

2001 ◽  
Vol 52 (8) ◽  
pp. 1375 ◽  
Author(s):  
Danielle J. Johnston ◽  
Arthur Ritar
Keyword(s):  
Larval Development ◽  
Early Stage ◽  
Structural Characteristics ◽  
Spiny Lobster ◽  
Filter Press ◽  
Primary Role ◽  
Formulated Diets ◽  
Jasus Edwardsii ◽  
Phyllosoma Larvae

Mouthpart and foregut structure indicates that Jasus edwardsii phyllosomas ingest soft fleshy foods such as gelatinous zooplankton. Mouthpart morphology changes little during larval development, indicating that ingestive capabilities and external mastication are well developed from an early age. However, the density and complexity of setation and robustness of individual mouthparts increases with age, suggesting a greater capacity to ingest larger prey during development. The foregut consists of a single chamber with a number of well-developed grooves, ridges, and setae but lacking a gastric mill. The primary role of the foregut is mixing, sorting, and filtering particles, preground by the mouthparts. Phyllosomas have been divided into early (stage I–III), mid (IV–V), and late (VI–X) stages based on the development of the filter press and main brushes. Increasing robustness of setation and complexity of the foregut suggest that the texture of prey becomes more muscular (fibrous) with larval development. The results presented here suggest that early-stage phyllosoma would benefit from a diet comprising soft gelatinous items, whereas late-stage phyllosomas are better prepared to deal with larger, fleshy prey. The changes in structural characteristics with age should also serve as a guide in the development of formulated diets.

scholarly journals Lipids and nutrition of the southern rock lobster, Jasus edwardsii, from hatch to puerulus

2001 ◽  
Vol 52 (8) ◽  
pp. 1475 ◽  
Author(s):  
Charles F. Phleger ◽  
Matthew M. Nelson ◽  
Ben D. Mooney ◽  
Peter D. Nichols ◽  
Arthur J. Ritar ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Lipid Class ◽  
Compositional Data ◽  
Dietary Manipulation ◽  
Omega 3 ◽  
Rock Lobster ◽  
Omega 3 Fatty Acid ◽  
Jasus Edwardsii ◽  
Omega 6 ◽  
Phyllosoma Larvae

We examined the lipid class and fatty-acid composition of the southern rock lobster, Jasus edwardsii, phyllosoma larvae and puerulus stage to improve understanding of their nutrition in relation to aquaculture. Lipid is critical in the nutrition of larval crustaceans, including lobsters. Specimens were from Tasmanian waters, Australia, and North Island, New Zealand, waters. Analyses were by TLC-FID and capillary GC and GC-MS. Phyllosoma larvae and nektonic pueruli were low in storage lipid (triacylglycerol), and phospholipid was the major lipid class. Sterol, mainly cholesterol, was the next most abundant class. The ratio of the essential omega-3 fatty acid eicosapentaenoic acid (EPA) to the omega-6 fatty acid arachidonic acid (AA) was lower in newly hatched phyllosomas (1.2–1.3) than in other phyllosomas (stages III–XI; 2.8–6.7) and pueruli (3.8). Ratios of the omega-3 fatty acid DHA (docosahexaenoic acid) to EPA were also lower in newly hatched phyllosomas (0.5) than in laterstage phyllosomas (1.5–2.1) and pueruli (1.2). We have followed up these compositional data by successfully enriching the live diet (Artemia) of early phyllosomas with AA, EPA and DHA. This dietary manipulation has achieved ratios of these key polyunsaturated fatty acids similar to those of wild phyllosomas. These findings will be of significance to the future of rock-lobster aquaculture.

Evidence of large-scale spatial declines in recruitment patterns of southern rock lobster Jasus edwardsii, across south-eastern Australia

2010 ◽  
Vol 105 (3) ◽  
pp. 163-171 ◽  
Author(s):  
Adrian Linnane ◽  
Caleb Gardner ◽  
David Hobday ◽  
André Punt ◽  
Richard McGarvey ◽  
...  
Keyword(s):  
Large Scale ◽  
Rock Lobster ◽  
South Eastern ◽  
Eastern Australia ◽  
Jasus Edwardsii ◽  
Recruitment Patterns ◽  
South Eastern Australia

scholarly journals Feeding Artemia and shellfish to phyllosoma larvae of southern rock lobster (Jasus edwardsii)

Aquaculture ◽  
2002 ◽  
Vol 212 (1-4) ◽  
pp. 179-190 ◽  
Author(s):  
Arthur J Ritar ◽  
Craig W Thomas ◽  
Adrian R Beech
Keyword(s):  
Rock Lobster ◽  
Jasus Edwardsii ◽  
Phyllosoma Larvae
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