Horizontal and vertical distribution of cirripede cyprid larvae in an upwelling system off the Portuguese coast

Santos, Antonina Dos; Santos, A dos; Conway, David Vp

doi:10.3354/meps329145

Cited by 35 publications

(10 citation statements)

References 31 publications

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“…A further point of interest regards the abundances of Chthamalus spp. cyprids recorded during the fixed station study (dos Santos et al, 2007). This study found that C. stellatus larvae were considerably more abundant than those of C. montagui.…”

Section: Larval Pool Assumptionsmentioning

confidence: 59%

Oceanographic and behavioural processes affecting invertebrate larval dispersal and supply in the western Iberia upwelling ecosystem

Queiroga

Cruz

Santos

et al. 2007

Progress in Oceanography

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The present review addresses recent findings made in the western Iberia ecosystem on the behavioural and physical interactions that regulate dispersal, supply to coastal habitats and settlement of invertebrate larvae. These studies used the barnacle Chthamalus spp. and the crab Carcinus maenas as model organisms. The observations made on the Iberian shelf showed extensive diel vertical migrations along the water column by representatives of both groups that have never been reported before. The interaction of the diel vertical migration with the two-layer flow structure of upwelling/downwelling circulation suggests a mechanism that may help to retain larvae in shelf waters during upwelling conditions. Measurements of daily supply of C. maenas megalopae to estuaries separated by 500 km disclosed a semilunar pattern, with highest supply around highest amplitude tides, indicating that supply of megalopae to estuaries is accomplished by selective tidal stream transport. Relaxation of equatorward winds also played a role in supply, by enhancing translocation of megalopae to the nearshore. Concerning Chthamalus larvae, the observations on daily settlement made at rocky shores also separated by 500 km showed unclear patterns between locations and years. The relationship of settlement with water temperature, tidal range and upwelling indices indicated that supply of barnacle cyprids may be controlled by multiple mechanisms, viz. upwelling/downwelling circulation, internal tidal bores and sea breezes.

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Section: Larval Pool Assumptionsmentioning

confidence: 59%

Oceanographic and behavioural processes affecting invertebrate larval dispersal and supply in the western Iberia upwelling ecosystem

Queiroga

Cruz

Santos

et al. 2007

Progress in Oceanography

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“…These results support the hypothesis that the more thermal stratification there is, the more behavioral control can be exerted by cyprids to accumulate closer to shore, and that stratification is an important determinant of the successful larval transport of cyprid larvae. Nearshore accumulation of cyprid larvae has been previously observed (dos Santos et al 2007, Tapia & Pineda 2007, Shanks & Shearman 2009). We hypothesize that thermal stratification mediates constrained larval distributions in nearshore waters.…”

Section: Discussionmentioning

confidence: 85%

Constrained nearshore larval distributions and thermal stratification

Hagerty¹,

Reyns²,

Pineda³

2018

Mar. Ecol. Prog. Ser.

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Vertical and cross-shore distributions and abundances of shallow-water barnacle larvae were characterized in La Jolla, southern California (USA), during a 2 yr period. Five stations located within 1 km of shore and ranging from 4−12 m water depths were sampled intensively in 2 m depth intervals during 27 cruises throughout spring−summer (April−July) and fall−winter (October−December) of 2014 and 2015. Larval abundances significantly decreased from 2014 to 2015, which could be related to the arrival of a warm-water anomaly (the so-called 'Blob') in 2014 and El Niño conditions in 2015. Despite the presence of these large-scale regional disturbances, vertical and cross-shore larval distributions were consistent throughout the 2 yr study period. Early-stage nauplii and Chthamalus fissus cyprids tracked bottom depth, and cyprids were on average deeper than nauplii. Vertical distributions were not related to the mid-depth of the thermocline or thermal stratification. Early-stage nauplii had a broader cross-shore distribution than cyprids, which were concentrated at inshore stations. Nearshore cyprid concentration had a positive relationship with thermal stratification, and the center of distribution of cyprids was farther offshore during fall−winter when stratification decreased. These results suggest that thermal stratification elicits enhanced behavioral control of cyprids to remain close to shore and reach the adult habitat.

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“…While we do not know the vertical migration patterns or preferred depth of larvae of M. coccopoma , larvae were positively phototactic at all instars; likewise, cyprids of other barnacle species are most abundant in surface waters (Pineda ; dos Santos et al. ). Inhabiting deeper waters in the Gulf Stream system would be likely to promote local retention (Hare & Govoni ).…”

Section: Methodsmentioning

confidence: 85%

Lower thermal limits to larval development do not predict poleward range limits of the introduced tropical barnacleMegabalanus coccopoma

Crickenberger

Walther

Moran

2017

Invertebrate Biology

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As the earth's climate has warmed, many tropical species have expanded their ranges poleward and encountered high‐latitude seasonal temperature regimes, in which further permanent expansion is limited by physiological vulnerability to cold temperatures. The barnacle Megabalanus coccopoma is native to shorelines from Baja California to Peru and has been introduced to many locations worldwide, including the southeastern USA. The ability of larvae to develop successfully at local temperatures can be an important factor limiting the spread of invasive species. To determine if cold temperatures limited larval success near the northern range limit of M. coccopoma along the Atlantic southeastern USA coast, we measured lower temperature limits to larval development, examined the effects of temperature on larval growth and energy accumulation, and calculated a larval energy budget to estimate the extent of potential larval dispersal in this region. Larvae were able to develop through metamorphosis at 16°C, which is much colder than sea surface temperatures during the spawning season in their invasive range, making it unlikely northern range limits are set by a lower temperature limit to larval development. Energy budgets suggest that for larvae produced at the northern end of the invasive range, long distance dispersal to sites far poleward of the current range limit is possible. Similar to the findings of the handful of other studies on cold tolerances of tropical marine invertebrate larvae, larvae should be successful far poleward of current adult distributions.

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Horizontal and vertical distribution of cirripede cyprid larvae in an upwelling system off the Portuguese coast

Cited by 35 publications

References 31 publications

Oceanographic and behavioural processes affecting invertebrate larval dispersal and supply in the western Iberia upwelling ecosystem

Oceanographic and behavioural processes affecting invertebrate larval dispersal and supply in the western Iberia upwelling ecosystem

Constrained nearshore larval distributions and thermal stratification

Lower thermal limits to larval development do not predict poleward range limits of the introduced tropical barnacleMegabalanus coccopoma

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