Larval Ecology

Phillips, Bruce F.; Sastry, A. N.

doi:10.1016/b978-0-08-091734-4.50008-1

Cited by 94 publications

(72 citation statements)

References 82 publications

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“…If environmental factors and not the size of the spawning stock determine the level of recruitment to the population, then management measures that aim to increase the size of the population by increasing levels of spawner abundance, may be ineffective. The long duration of the larval phase of spiny lobsters (Phillips & Sastry 1980) increases the probability that any relationship between abundance of spawners and recruits will be obscured by variability caused by the effects of environmental factors upon the survival of larvae (e.g., Caputi & Brown 1993;Caputi et al 1995).…”

Section: Introductionmentioning

confidence: 99%

“…Sampling is usually done at the earliest stage of the species' life-cycle after hatching, when it is practical to catch the organisms. In spiny lobsters, this is commonly the post-larval stage known as the puerulus, a transparent, free-swimming animal that in shallow water species moves from offshore waters towards shore and settles in shallow habitat (Phillips & Sastry 1980).…”

Section: Introductionmentioning

confidence: 99%

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Distribution and abundance of recruits of the eastern rock lobster (Jasus verreauxi) along the coast of New South Wales, Australia

Montgomery

Craig²

2005

New Zealand Journal of Marine and Freshwater Research

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In the mid 1990s, the New South Wales government introduced management measures to increase the size of the population of the eastern rock (spiny) lobster, Jasus verreauxi. A fully orthogonal sampling design was begun in July 1995 to test, amongst others, the hypothesis that the relative abundance of recruits (stages of peuruli to early juveniles combined) to the eastern rock lobster population will change over space and time. In the design for the full sampling strategy were the factors of Year (eight levels) and Location (four levels). Three replicate collectors at each of three sites at each location were sampled during the first quarter of each lunar month between August and January between 1995-96 and 2002-03 (inclusive). Recruits occurred on collectors between September and January each year. Results of the two-factor ANOVA showed a significant interaction between Year and Location, meaning that differences in mean relative abundance of recruits between years will depend upon the location. Comparison of means (SNK test) show that in each year the relative abundance of recruits was greatest at the southern locations, but no pattern in mean relative abundance between years for each location was apparent. Management measures introduced in the mid 1990s to increase population size have not to date resulted in increasing levels of recruitment. Considering this, levels of recruitment to the population appear to be influenced most by variation in environmental factors rather than levels of egg production from the stock.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution and abundance of recruits of the eastern rock lobster (Jasus verreauxi) along the coast of New South Wales, Australia

Montgomery

Craig²

2005

New Zealand Journal of Marine and Freshwater Research

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“…Tolerance to high temperatures changes throughout larval development, but the second stage larvae possess a much lower temperature tolerance than any other stage, even in oxygen saturated water. Survival rates from one stage to the next of lab-reared animals remain constant from one stage to the next when animals are individually held (Phillips and Sastry, 1980). The documented morphological and physiological changes during development in Homarus americanus make this an excellent species for the study proposed here.…”

Section: Larval Morphology and Developmentmentioning

confidence: 88%

“…The duration of the fourth stage is significantly longer than any of the first three at all temperatures (Phillips and Sastry, 1980). Stage I -III larvae utilize lipid reserves rapidly, but stage IV animals store lipids and utilize more protein.…”

Section: Larval Morphology and Developmentmentioning

confidence: 91%

Developmental changes in the structure and function of lobster hemocyanin

Olson¹

1991

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“…The mid stages are stronger vertical swimmers and are carried by the prevailing currents into the offshore oceanic waters. The late stages are more abundant closer to the coast and accumulate near the shelf break (Phillips & Sastry 1980). After metamorphosis, the fastswimming pueruli cross the shelf (Phillips & Mc William 1986) to settle in their particular habitat which is shallower than that of the adult.…”

Section: Life Cycle Of Stridentesmentioning

confidence: 99%

Review

George

2005

New Zealand Journal of Marine and Freshwater Research

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A comparison of the documented ecology and behaviour of the separate phases in the life cycles is presented. Data gathered during the review show that during the evolution of the family from deeper-water habitats to the more rapidly fluctuating shallower waters, there have been many biological adjustments at each phase in their life cycles. In the more ancient Stridentes genera, like Puerulus, the larvae are found well below the surface waters and the pueruli often settle at greater depths than those of the adults. Long incubation times, few larval instars, and year-round spawning are probably their life cycle characteristics. As an "intermediateevolved" genus of Stridentes, Palinurus lives along the outer shelf, grows slowly, matures late, and breeds seasonally once a year. Incubation time is long, the larvae live at depth, the number of larval instars is limited, and the puerulus is a weak swimmer. Settlement is often downstream of the breeding stock. Incubation times are short for the more recently evolved Stridentes Panulirus, the larvae pass through many instars in the surface waters to c. 200 m. Some pueruli settle in special coastal habitats, others settle in the same habitat as the adult. Breeding in the cooler water First Major Lineage species is seasonal, one or two broods being pro- changes from deep to shallower water is comparable with that of Stridentes. Incubation is probably long in the more ancient Projasus, the larvae are rare in surface waters and the pueruli settle at depths similar to those of the adults. Sagmariasus and Jasus breed once during a defined season, incubation time is moderate, and the larvae pass through many instars. The pueruli of Sagmariasus settle downstream and exhibit contranatant migration whereas the pueruli of Jasus swim strongly to their shallow habitats. In each life cycle phase, migration methods range from vertical paddling in phyllosomata, horizontal swimming in pueruli, and horizontal walking when juveniles move to adult habitats. Adult movements are associated with foraging, searching for shelter, avoiding adverse seasonal conditions, or walking to preferred offshore locations for moulting and reproduction.

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Larval Ecology

Cited by 94 publications

References 82 publications

Distribution and abundance of recruits of the eastern rock lobster (Jasus verreauxi) along the coast of New South Wales, Australia

Distribution and abundance of recruits of the eastern rock lobster (Jasus verreauxi) along the coast of New South Wales, Australia

Developmental changes in the structure and function of lobster hemocyanin

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