Moulting and reproduction of the spiny lobster Jasus edwardsii (Decapoda: Palinuridae) in northern New Zealand

1989 ◽  
Vol 103 (3) ◽  
pp. 303-310 ◽  
Author(s):  
A. B. MacDiarmid
Keyword(s):  
New Zealand ◽  
Spiny Lobster ◽  
Jasus Edwardsii

Sea-cage culture of the spiny lobster Jasus edwardsii in New Zealand

2001 ◽  
Vol 52 (8) ◽  
pp. 1419 ◽  
Author(s):  
Andrew G. Jeffs ◽  
Phil James
Keyword(s):  
New Zealand ◽  
Spiny Lobster ◽  
Careful Selection ◽  
Cage Culture ◽  
Culture Experiment ◽  
Northern Site ◽  
Jasus Edwardsii ◽  
Wet Weight ◽  
Sea Cage ◽  
Selection Of

The potential for using suspended sea cages for the aquaculture of juvenile spiny lobsters was assessed for Jasus edwardsii in New Zealand. Lobsters were grown for a year in sea cages at three sites starting from pueruli and regularly fed on opened mussels. Larger juvenile lobsters of two size classes were also held in sea cages with small live mussels for food. Pueruli grew at rates that were close to or greater than those previously recorded from tank experiments. At the most northern site, lobsters grew most quickly to an average of 42.1 mm CL 0.4 s.e. and 36.9 g wet weight 1.0 s.e. in a year. The mortality of lobsters differed with site, but at one site was lower (14%) than was recorded in a previous tank-culture experiment (25%). The differences in growth and mortality among sites appear to be related to differences in ambient water temperatures. Larger juvenile lobsters were found to be unable to feed on the small live mussels. These results indicate that suspended sea-cage culture has considerable potential for the aquaculture of spiny lobster juveniles but will require the careful selection of sites and the development of effective feeding arrangements.

Swimming energetics of the postlarvae of the spiny lobster Jasus edwardsii in New Zealand

2018 ◽  
Vol 94 (3) ◽  
pp. 821-833 ◽  
Author(s):  
Luvia Lorei García-Echauri ◽  
Andrew Jeffs
Keyword(s):  
New Zealand ◽  
Spiny Lobster ◽  
Jasus Edwardsii

Distribution and condition of pueruli of the spiny lobster Jasus edwardsii offshore from north-east New Zealand

2001 ◽  
Vol 52 (8) ◽  
pp. 1211 ◽  
Author(s):  
Andrew G. Jeffs ◽  
Stephen M. Chiswell ◽  
John D. Booth
Keyword(s):  
New Zealand ◽  
Developmental Process ◽  
Spiny Lobster ◽  
Total Lipid Content ◽  
Offshore Water ◽  
North East ◽  
The North ◽  
Jasus Edwardsii ◽  
Phyllosoma Larvae ◽  
Exogenous Trigger

Pelagic spiny lobster, Jasus edwardsii, pueruli and phyllosomas were sampled on offshore transects from the south-east coast of the North Island of New Zealand in February 1998. Carapace length, weight, and total lipid content of pueruli (n = 360) were assessed; 33 pueruli had soft carapaces, indicative of recent metamorphosis from final-stage (stage 11) phyllosoma larvae. The recently metamorphosed pueruli occurred 24–216 km offshore, much farther offshore than has been previously suggested for the location of metamorphosis. Their distribution was compared to information on their size and condition, as well as their distance offshore, water depth, temperature and salinity, and estimates of phytoplankton biomass. The results indicate that a threshold of larval energy reserve is unlikely to trigger metamorphosis, but rather some exogenous trigger may be involved, or metamorphosis may be part of a programmed developmental process. The distribution and condition of the new pueruli suggest that about 84% had the energetic capacity to swim inshore to settle. This result may have important implications for patterns of puerulus settlement and subsequent recruitment of lobsters to coastal populations and their important associated fisheries. It may influence both the seasonal and interannual variability in settlement observed in this species.

Trajectories of spiny lobster Jasus edwardsii recovery in New Zealand marine reserves: is settlement a driver?

2012 ◽  
Vol 39 (3) ◽  
pp. 295-304 ◽  
Author(s):  
DEBBIE J. FREEMAN ◽  
ALISON B. MACDIARMID ◽  
RICHARD B. TAYLOR ◽  
ROBERT J. DAVIDSON ◽  
ROGER V. GRACE ◽  
...  
Keyword(s):  
New Zealand ◽  
Protected Areas ◽  
Marine Reserves ◽  
Spiny Lobster ◽  
Reserve Design ◽  
Sudden Increase ◽  
Species Response ◽  
Jasus Edwardsii ◽  
Key Driver ◽  
Initial Recovery

SUMMARYMonitoring species’ response in marine protected areas is important for informing both the management of those areas and the establishment of additional protected areas. Populations of spiny lobsters Jasus edwardsii were monitored in eight New Zealand marine reserves for up to 34 years. The populations displayed highly variable responses to protection. While a few showed rapid (within 1–2 years of protection) increases in abundance, others showed little response even after a decade of protection. Some reserves displayed little initial recovery, then a sudden increase following several years of protection, while others displayed significant declines in abundance following initial recovery. Marine reserves located in areas with initially high densities of juveniles tended to have rapid recovery, but aspects of reserve design had no significant influence on the recovery rate. Variability among recovery trajectories also suggests that supply-side dynamics may be a key driver of lobster recovery. Densities of legal-sized lobsters were positively correlated with reserve age, but the abundance of juvenile lobsters increased in all but one reserve, indicating enhanced recruitment, survival and/or movement of juvenile lobsters into reserves. It is important to consider the placement of reserves, with respect to potential levels of larval supply, when establishing marine reserves for either conservation or fisheries management purposes and for evaluating their effectiveness.

Growth of captive Jasus edwardsii (Hutton) (Crustacea:Palinuridae) in north-eastern New Zealand

1997 ◽  
Vol 48 (8) ◽  
pp. 903 ◽  
Author(s):  
Simon H. Hooker ◽  
Andrew G. Jeffs ◽  
Robert G. Creese ◽  
Kala Sivaguru
Keyword(s):  
New Zealand ◽  
Sea Water ◽  
Spiny Lobster ◽  
Total Mortality ◽  
Mortality Rates ◽  
Size Class ◽  
North Eastern ◽  
Jasus Edwardsii ◽  
In Captivity ◽  
One Year

The relations between growth and mortality rates and water temperature are important in determining the economic success of spiny lobster aquaculture. Captive juvenile lobsters (Jasus edwardsii) were grown at a site in north-eastern New Zealand where ambient sea-water temperatures in the culture tanks ranged from 23.3°C in summer to 13.4°C in winter, with an annual mean of 17.2°C (s.d. = 2.8). The growth and mortality rates of three size classes of juvenile lobsters were examined over one year in captivity. All lobsters were fed cultured mussels. Lobsters in the smallest size class grew to an average of 39 mm carapace length (31 g) in their first year from settlement. Growth to 200 g was estimated to take three years. Total mortality of lobsters was 12.8% and was greatest in the 0+ size class, for which most mortality occurred in a single tank. Of the total mortality, 64% occurred during two summer months (January and February). The growth and mortality of J. edwardsii are compared with previously unpublished information.

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