Physical oceanography of the North Carolina continental shelf during the fall and winter seasons: implications for the transport of larval menhaden

Werner, V.; Blanton,; Quinlan,; Luettich,

doi:10.1046/j.1365-2419.1999.00016.x

Cited by 58 publications

(85 citation statements)

References 46 publications

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“…More recently, an understanding of the physical dynamics of larval transport (e.g. Werner et al 1999) has outpaced advances in the understanding of behavioural processes, notwithstanding recent advances in evaluation of larval swimming capacity. The implications of this dichotomy are far-reaching because underestimating larval ability and its consequences for dispersal and recruitment could be directly linked to our inability to predict the connectivity between habitats and to effectively manage marine fish populations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Passive and active behavioural contributions to patchiness and spatial pattern during the early life history of marine fishes

Bradbury

Snelgrove²,

Pepin³

2003

Mar. Ecol. Prog. Ser.

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Multiple ichthyoplankton surveys of Placentia Bay, Newfoundland during the spring and summers of 1997 and 1998 indicated that both passive and active processes contribute to spatial pattern in pelagic eggs and larval fish. Distribution patterns of pelagic eggs and early larvae in coastal Newfoundland waters were consistent with passive drift during development, but older larvae were associated with areas of high production. Recently hatched larvae from pelagic spawners decreased in size throughout the spawning season, reflecting seasonal decreases in egg diameter. Larvae from demersal eggs increased in size over the same time period, possibly reflecting retention and growth. Lloyd's index of patchiness calculated for pelagic eggs generally increased during development, suggesting passive retention. Patchiness decreased after hatch, then increased at approximately 10 mm. We hypothesize that the observed spatial patterns in older larvae, seasonal size increases in larvae from demersal eggs, and ontogenetic changes in patchiness reflect active processes. Predator patchiness, ontogenetic changes in spatial patterns, and published larval consumption rates support the hypothesis that mortality did not generate this pattern. Furthermore, mean crowding of capelin larvae by potential prey increased with development. Increases in patchiness during late larval development coincided with the size at which swimming ability was predicted to exceed ambient flow. This pattern suggests that larger larvae may actively contribute to their spatial distribution. We conclude that swimming ability and behaviour become increasingly important in determining spatial distribution patterns as pelagic larvae develop.

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Section: Introductionmentioning

confidence: 99%

Passive and active behavioural contributions to patchiness and spatial pattern during the early life history of marine fishes

Bradbury

Snelgrove²,

Pepin³

2003

Mar. Ecol. Prog. Ser.

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“…Many estuary-dependent fishes rely on currents to transport eggs and larvae from a marine spawning site to an estuarine nursery (Able & Fahay 1998, Werner et al 1999. Advection by currents is largely responsible for transport of the eggs and early larvae (Power 1984).…”

Section: Introductionmentioning

confidence: 99%

Behaviour of settlement-stage larvae of fishes with an estuarine juvenile phase: in situ observations in a warm-temperate estuary

Trnski¹

2002

Mar. Ecol. Prog. Ser.

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Observations of behaviour were made on a total of 103 settlement-stage larvae (9 to 15 mm standard length [SL]) of 4 species of estuary-dependent fishes in Lake Macquarie, a barrier estuary on the central coast of New South Wales, Australia. Larvae were released at mid-depth over deep water or within sight of settlement habitat, and their behaviour was observed by SCUBA divers. ) for Pagrus auratus (all family Sparidae) and 12.5 cm s -1 (11.2 BL s -1 ) for Girella tricuspidata (Girellidae). These speeds were faster than previously recorded for temperate fish larvae. It is hypothesised that body morphology determines swimming ability. At these speeds, the larvae are faster than ambient currents. The majority of larvae of all species swam in a directional (non-random) manner, but there was no evidence that the larvae were orienting to the shoreline or the sun. There were species-specific differences in depth profile: the 3 species that settle in seagrass beds preferentially swam near the surface; P. auratus, which settles over soft bottoms, preferentially swam to the bottom. Swimming near the surface in Lake Macquarie brings larvae into strong wind-driven surface currents that carry them to a shoreline and settlement habitat. Larvae of only G. tricuspidata (1 of 3 species that settle in seagrass) were rarely observed to settle when they were released within sight of a seagrass margin.

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“…Under October NNE winds, onshore flow was greater near‐surface and offshore flow was greater at depth (see Fig. 12 in Werner et al ., 1999 ). As a result, more release locations resulted in arrival of menhaden ‘larvae’ to inlets, whereas more release locations resulted in the export of spot ‘larvae’ from the shelf.…”

Section: Model Resultsmentioning

confidence: 99%

“…2). The seasonal and event‐scale patterns in wind during the winter of 1994/95 are typical of fall/winter in the SABRE study region ( Blanton et al ., 1985 , 1989; Werner et al ., 1999 ).…”

Section: Modellingmentioning

confidence: 99%

Larval transport during winter in the SABRE study area: results of a coupled vertical larval behaviour–three‐dimensional circulation model

Hare

Quinlan

Werner

et al. 1999

Fisheries Oceanography

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A three‐dimensional circulation model was used in conjunction with larval fish vertical behaviour models to study the interaction between larval vertical distribution, advection and the outcome of larval transport along the central portion of the east coast of the United States. The circulation model was forced by tides, a northern boundary inflow, and winds. Vertical behaviour models were developed for Atlantic menhaden (Brevoortia tyrannus) and spot (Leiostomus xanthurus). The purpose of this modelling effort was to investigate the transport pathways of Atlantic menhaden and spot larvae from offshore spawning grounds to estuarine nursery habitats. The coupled circulation and behavioural model demonstrated the importance of along‐shelf transport in what is generally thought to be a ‘cross‐shelf’ problem. Cross‐shelf transport was associated with bathymetric features, such as shoals. Both physical (e.g. wind) and biological (e.g. changes in larval behaviour) events were responsible for many of the observed patterns in larval transport. Overall, larval transport was determined by circulation but was modified by larval vertical distributions.

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Physical oceanography of the North Carolina continental shelf during the fall and winter seasons: implications for the transport of larval menhaden

Cited by 58 publications

References 46 publications

Passive and active behavioural contributions to patchiness and spatial pattern during the early life history of marine fishes

Passive and active behavioural contributions to patchiness and spatial pattern during the early life history of marine fishes

Behaviour of settlement-stage larvae of fishes with an estuarine juvenile phase: in situ observations in a warm-temperate estuary

Larval transport during winter in the SABRE study area: results of a coupled vertical larval behaviour–three‐dimensional circulation model

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