Modelling the advection of vertically migrating shrimp larvae

Rothlisberg, Peter C.; Church, John A.; Forbes, A. M. G.

doi:10.1357/002224083788519759

Cited by 102 publications

(45 citation statements)

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“…This result is consistent with the results of Rothlisberg et al (1983) who showed that the introduction of wind into their larval advection model had little effect on either the distance or direction of larval movement. The model also predicts that the potential for advection of larvae towards the Norman River is higher during the winter-spring months from May to November than during the summer-autumn months from December to April.…”

Section: Discussionsupporting

confidence: 92%

“…More recently, seasonal changes in the advection of larvae from spawning areas to inshore nursery areas have been described. Rothlisberg et al (1983) have demonstrated that seasonal changes in the timing of tidal currents relative to the timing of vertical migratory behaviour of penaeid larvae results in a different seasonal pattern of postlarval immigration in different areas of the Gulf of Carpentaria.…”

Section: Introductionmentioning

confidence: 99%

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Short-term and long-term influences of the immigration of postlarval banana prawns Penaeus merguiensis, into a mangrove estuary of the Gulf of Carpentaria, Australia

Staples¹,

Vance²

1985

Mar. Ecol. Prog. Ser.

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Postlarval Penaeus merguiensis de Man were sampled regularly at the mouth of the Norman River estuary in the south-eastern Gulf of Carpentaria, Australia. from 1975 to 1979. A grid of stations up to 10 km offshore from the estuary mouth was also occupied over a 24 h period during November 1978. In these offshore stations, postlarvae migrated vertically in the water column in response to changes in tidal height, rising to near the surface just before low tide. Postlarvae entered the estuary throughout the flood tide with a peak in abundance occurring at the time of maximum current, regardless of time of day or night. During the monsoonal wet season (Dec-Mar), when estuary salinities were lower, postlarvae occurred deeper in the water column. Over the 4 yr of sampling, immigration on a day-to-day basis was extremely variable but a consistent spring-neap tidal cycle could be demonstrated. More postlarvae immigrated during the spring-tide period than during the neaps, although the pattern was complicated by a larger peak associated with every second spring tide (27.32 d). Although difficult to separate from tidal phase changes, lunar changes per seappeared to be less important than the relation between tidal phase changes and timing of moonset and moonrise. Immigration was restricted to the warmer months between October and April each year, with a large pulse of recruits occurring usually in spring (Oct-Nov) and a less consistent pulse occurring in autumn (Mar-May). Inter-annual variations were also large and it was suggested that these year-to-year differences were related to the amount of rainfall recorded during the previous wet season (9 mo earlier) and the associated changes in salinity, temperature, nutrients and abundance of adult prawns. Over larger time scales, both size and developmental stage (number rostra1 spines) were directly related to postlarval abundance. Thus, postlarvae tended to be larger and more well developed during spring and autumn of each year, and were also larger during years of higher immigration rates. Increased growth as well as survival in years following good rainfall and enrichment is suggested.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Short-term and long-term influences of the immigration of postlarval banana prawns Penaeus merguiensis, into a mangrove estuary of the Gulf of Carpentaria, Australia

Staples¹,

Vance²

1985

Mar. Ecol. Prog. Ser.

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“…The effects of density stratification, which cause vertical variations in eddy viscosity, are not therefore included and the model should be used with great caution in such circumstances. Rothlisberg et al (1983) have used a model similar to that described above in a study of shrimp larvae migration in wind-driven and tidal currents in the Gulf of Carpentaria, northern Australia. Vertical current structure was derived from a model by Jordan & Baker (1980), of which the Prandle model may be regarded as a special case.…”

Section: Non-linear Velocity Shearmentioning

confidence: 99%

Vertical migration in tidal currents

Hill¹

1991

Mar. Ecol. Prog. Ser.

101

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The principles which govern horizontal motion induced by vertical migration in oscillatory, sheared (tidal) currents are discussed. A simple model which employs linear velocity shear in the vertical, and sinusoidal vertical migration, is used to establish the fundamental ideas. For linear shear. only when tidal and migration periods exactly match is long-term unidirectional transport possible. For non-linear forms of velocity shear, unidirectional transport is also possible for migration periods which are exact multiples of the tidal period. This may be regarded as a resonant interaction between tide and migration. For migration at non-tidal periods the horizontal displacement remains bounded but the amplitude of displacements increases as tidal and migration periods become close. The time between peak horizontal displacements is usually given by the beat period between tidal and migration periods.Die1 migration in M2 semi-diurnal tidal currents induces maximum horizontal excursions of no more than a few tens of kilometers and, over a duration of 15 d, there is no net displacement. In contrast diel migration in diurnal tidal currents of the K1 constituent (23.93 h) can lead to displacements of hundreds of kilometers and the duration of effective unidirectional transport is 171 d. A model due to Prandle (1982) which incorporates rotary tidal motion and more realistic velocity shear is presented as a tool for estimating migration-induced motion in tidal currents.

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“…Nevertheless, selective tidal transport has been proposed as a mechanism capable of producing net horizontal movement (Cronin and Forward 1982;Hill1991a, 1991bHill1991a, and 1994Rothlisberg et al 1983;Thi€bault et al 1992), though no conclusive evidence supporting this mechanism has been collected for inner-shelf larval species. Pressure can serve as a synchronizing cue for larval response to a semidiurnal tide (M 2 , 12.4 hr;Knight-Jones 1966;Marsden 1994); however, a synchronizing cue for larval response to the diurnal tide (in the presence of a stronger semidiurnal tide) is less clear.…”

Section: Biological and Physical Processes Influencing Vertical Distrmentioning

confidence: 99%

Temporal variability and vertical structure in larval abundance : the potential roles of biological and physical processes

Garland¹

2000

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Recruitment variability in benthic invertebrate populations results from variability in planktonic larval supply and from processes occurring during and after larval settlement onto the seafloor. The focus of this thesis is on the temporal and spatial variability in larval supply, the extent to which planktonic larval distributions are determined by larval behaviors and physical processes, and how differentially distributed larvae are advected to potential adult habitats by inner-shelf circulation such as wind-driven upwelling and downwelling. This research capitalized on two sets of larval concentration time series, collected by moored zooplankton pumps, and complemented by synoptic hydrographic time-series data.High variability was observed in larval concentration time series, yet the variations were nonrandom. Within the context of the sampling regime, two dominant modes of variability existed. One source of variation was associated with the synoptic meteorological time scale, and the other with the diurnal time scale. Over relatively long time scales, larvae were associated with particular water masses, defined by temperature-salinity characteristics. Within a particular water mass, group-specific vertical patterns were observed over both long and short time scales. "Lowfrequency" temporal variatious resulted primarily from wind-driven cross-shelf transport of water masses in which larvae were differentially distributed relative to the thermocline. "Higherfrequency" variations were attributed to diel vertical migrations. These findings suggest that larvae were passive to the degree that they were horizontally advected with certain water masses, but active to the degree that they could alter their vertical position in the water column.Local hydrodynamics, larval associations with specific water masses, and the vertical structure of larvae resulted in differential larval transport to potential adult habitats. Larval data indicate the times and places of possible coupling between water-column organisms and the benthos, leading to certain predictions regarding when and where larval settlement should be greatest.Time-series measurements of larval concentration yield a new perspective on the temporal and spatial variability in larval distributions at an inner-shelf site. Determining how processes operating at the synoptic and diurnal time scales are coupled, and to what extent they influence recruitment variability, represents a challenging extension of this work.

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Modelling the advection of vertically migrating shrimp larvae

Cited by 102 publications

References 0 publications

Short-term and long-term influences of the immigration of postlarval banana prawns Penaeus merguiensis, into a mangrove estuary of the Gulf of Carpentaria, Australia

Short-term and long-term influences of the immigration of postlarval banana prawns Penaeus merguiensis, into a mangrove estuary of the Gulf of Carpentaria, Australia

Vertical migration in tidal currents

Temporal variability and vertical structure in larval abundance : the potential roles of biological and physical processes

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