Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast

Queiroga, Henrique; Almeida, Miguel; Alpuim, Teresa; Flores, Augusto A. V.; Francisco, Sara Martins; González-Gordillo, I.; Miranda, Ana Isabel; Silva, Inês C.; Paula, José

doi:10.3354/meps307021

Cited by 80 publications

(95 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Megalopae were collected with the use of two passive plankton nets described by Queiroga et al (2006). The nets were deployed at a station inside the Ria de Aveiro facing the inlet, one below the surface and one above the bottom, within one tidal excursion from the inlet.…”

Section: Sample Collectionmentioning

confidence: 99%

“…FSTAT version 2.9.3.2 (Goudet, 2001) was employed for calculating Wright's F IS and F ST (Weir and Cockerham, 1984), number of alleles (N A ), allelic richness (A) and for As the Portuguese west coast has an approximate north-south orientation and according to the upwelling theory we computed the along-shore component of wind stress (for details see Queiroga et al, 2006). Wind stress with a negative component indicates northerly winds, which favour upwelling; wind stress with a positive component indicates southerly winds, which favour downwelling.…”

Section: Genetic Analysismentioning

confidence: 99%

“…The current understanding of the oceanographic mechanisms coupled with larval behaviour shows that diel vertical migration (dos Santos et al, 2008) promotes retention of crab larvae in the inner shelf during spring and early summer, through interaction with the two-layered flow typical of upwelling circulation (Marta- . Relaxation of upwelling causes translocation of the larvae to the near-shore environment; supply into estuaries then occurs by selective tidal stream transport (for example, Queiroga et al, 2006). Available laboratory and field studies indicate that pulses of decapod larvae of the same age react coherently to environmental stimuli (Queiroga and Blanton, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…After the spring transition, which is marked by a change on the general direction of the wind from poleward to equatorward, upwelling events increase in frequency, intensity and length and continue throughout the summer. Spatial and temporal heterogeneity in oceanographic conditions affect larvae during development and promote episodic and variable supply back to adult populations (Almeida and Queiroga, 2003;Queiroga et al, 2006), thereby influencing which larvae actually recruit to the next generation. The current understanding of the oceanographic mechanisms coupled with larval behaviour shows that diel vertical migration (dos Santos et al, 2008) promotes retention of crab larvae in the inner shelf during spring and early summer, through interaction with the two-layered flow typical of upwelling circulation (Marta- .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Temporal genetic homogeneity among shore crab (Carcinus maenas) larval events supplied to an estuarine system on the Portuguese northwest coast

et al. 2010

Self Cite

View full text Add to dashboard Cite

Despite the importance of larval biology in the life histories of many marine animals, relatively little information exists on the dynamics and genetic composition of larval cohorts. The supply of megalopae larvae of the shore crab, Carcinus maenas, was measured on a daily basis during 8 months spread along two larval periods (2006 and 2007) at the Ria de Aveiro estuary, on the Portuguese northwest coast. A total of 10 microsatellite DNA loci were employed to explore the genetic structure, variability and relatedness of temporally distinct megalopal events, selected from the major pulses of supply. Larval variation was also compared genetically with that of a previously studied adult crabs sample, at the same loci, collected in 2006 and 2007 along the Iberian Peninsula. Results revealed a lack of genetic differentiation and identical diversity levels among larval events over time. No evidence of reduced genetic diversity between megalopae relative to the diversity assessed from the pooled sample of adults was found. Moreover, there was no evidence of any family relatedness among larvae from temporal events. The results obtained for C. maenas contradict predictions made by the sweepstakes reproduction hypothesis, in which large variance in reproductive success is expected, which is presumably detectable as sharp genetic discontinuities among separate larval events. Data here indicate conversely a high degree of temporal genetic stability among larval supply to a given estuary under variable oceanographic conditions, consistent with the hypothesis that sampled larvae were drawn from a large number of adults that do not differ in reproductive success.

show abstract

Section: Sample Collectionmentioning

confidence: 99%

Section: Genetic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temporal genetic homogeneity among shore crab (Carcinus maenas) larval events supplied to an estuarine system on the Portuguese northwest coast

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…The effect of such currents on the larval supply to the reef depends on the location of the larvae in the water column (Shanks 1998;Garland et al 2002;Shanks and Brink 2005), and the local topography (McCulloch and Shanks 2003;Queiroga et al 2006). Upwelling and downwelling are characterized by flow to different (mostly opposite) directions near the bottom and at the surface.…”

mentioning

confidence: 99%

Possible effects of downwelling on the recruitment of coral reef fishes to the Eilat (Red Sea) coral reefs

Kiflawi

Gildor

Abelson

2007

Limnology & Oceanography

View full text Add to dashboard Cite

We compared water current measurements with data on the recruitment of reef fishes to a coral reef in Eilat, Red Sea for two consecutive recruitment seasons. There was a clear correlation between the daily number of recruits and the magnitude of the downwelling flow, suggesting that an increase in offshore (near bottom) flow induces higher recruitment. The higher recruitment may be the result of larval swimming against the flow. Although the exact mechanism explaining this correlation is unclear, it may involve odor transport from the reef by the downwelling currents, which reaches competent larvae in deeper water and directs them to potential settlement sites.

show abstract

Semilunar postlarval settlement periodicity ensuing from semilunar larval release cycle in the Nihonotrypaea harmandi (Crustacea, Decapoda, Axiidea, Callianassidae) population on an intertidal sandflat in an open marine coastal embayment

et al. 2020

View full text Add to dashboard Cite

Many decapod crustaceans in marine intertidal habitats release larvae toward coastal oceans, from which postlarvae (decapodids: settling‐stage larvae) return home. Decapodid settlement processes are poorly understood. Previous studies showed that in Kyushu, Japan, the callianassid shrimp population on an intertidal sandflat of an open bay joining the coastal ocean near a large estuary released eight batches of larvae basically in a semilunar cycle from June through October and that decapodids performed diel vertical migration, occurring in the water column nocturnally. We conducted (a) frequent sampling for population density and size‐composition on the sandflat through one reproductive season, (b) planktonic and benthic sampling for decapodids around the bay mouth, and (c) current meter deployment at three points across the bay mouth for tidal harmonic analysis. On the sandflat, six batches of newly‐settled decapodids (settlers) occurred in a semilunar periodicity until October, with peaks occurring 0–3 days before syzygy dates except for the first one. For larval Batches 1–4, buoyancy‐driven shoreward subsurface currents during July to mid‐October would transport some pre‐decapodid‐stage larvae (zoeae) toward the bay. The absence of expected settler Batches 7–8 would be due to the converse subsurface currents caused by water‐column mixing and seasonal winds after mid‐October, carrying zoeae offshore. Once in the bay, phasing of night and nighttime‐averaged shoreward tidal current explained the settlement pattern for Batches 1–4. For Batches 5–6 occurring in mid‐September to mid‐October, water currents generated by seasonal wind and tidal forcings may have caused peak settlement after the time expected from tidally‐driven decapodid transport.

show abstract

Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast

Cited by 80 publications

References 68 publications

Temporal genetic homogeneity among shore crab (Carcinus maenas) larval events supplied to an estuarine system on the Portuguese northwest coast

Temporal genetic homogeneity among shore crab (Carcinus maenas) larval events supplied to an estuarine system on the Portuguese northwest coast

Possible effects of downwelling on the recruitment of coral reef fishes to the Eilat (Red Sea) coral reefs

Semilunar postlarval settlement periodicity ensuing from semilunar larval release cycle in the Nihonotrypaea harmandi (Crustacea, Decapoda, Axiidea, Callianassidae) population on an intertidal sandflat in an open marine coastal embayment

Contact Info

Product

Resources

About