Effect of pelagic larval growth and size-at-hatching on post-settlement survivorship in two temperate labrid fish of the genus Symphodus

Raventós, Núria; Macpherson, Enrique

doi:10.3354/meps285205

Cited by 57 publications

(60 citation statements)

References 47 publications

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“…Similar effects have been observed in temperate reef fishes (e.g., Shima andFindlay 2002, Raventos andMacpherson 2005). However, it remains unclear if size-selective mortality during larval dispersal and recruitment is a consistent feature affecting most cohorts within a fish population.…”

Section: Introductionsupporting

confidence: 68%

Genetic Identity Determines Risk of Post-Settlement Mortality of a Marine Fish

Vigliola

Doherty

Meekan

et al. 2007

Ecology

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Abstract. Longitudinal sampling of four cohorts of Neopomacentrus filamentosus, a common tropical damselfish from Dampier Archipelago, Western Australia, revealed the evolution of size structure after settlement. Light traps collected premetamorphic individuals from the water column (''settlers'') to establish a baseline for each cohort. Subsequently, divers collected benthic juveniles (''recruits'') at 1-3-month intervals to determine the relative impacts of post-settlement mortality during the first three months. Growth trajectories for individual fish were back-calculated from otolith records and compared with nonlinear mixed-effects models. Size-selective mortality was detected in all cohorts with the loss of smaller, slower growing individuals. Three months after settlement, recruits showed significantly faster growth as juveniles, faster growth as larvae, and larger sizes as hatchlings. The timing and intensity of post-settlement selection differed among cohorts and was correlated with density at settlement. The cohort with the greatest initial abundance experienced the strongest selective mortality, with most of this mortality occurring between one and two months after settlement when juveniles began foraging at higher positions in the water column. Significant genetic structure was found between settlers and three-month-old recruits in this cohort as a result of natural selection that changed the frequency of mtDNA haplotypes measured at the control region. The extent of this genetic difference was enlarged or reduced by artificially manipulating the intensity of size-based selection, thus establishing a link between phenotype and haplotype. Sequence variation in the control region of the mitochondrial genome has been linked to mitochondrial efficiency and weight gain in other studies, which provides a plausible explanation for the patterns observed here.

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Section: Introductionsupporting

confidence: 68%

Genetic Identity Determines Risk of Post-Settlement Mortality of a Marine Fish

Vigliola

Doherty

Meekan

et al. 2007

Ecology

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“…Some studies highlighted a negative correlation between PLD, size-at-hatching, and size-at-settlement (Raventos and Macpherson 2005). This would imply, in our case, that both smallest and largest settlers, in terms of size at settlement, have higher survival than those displaying an intermediate size.…”

Section: Discussionsupporting

confidence: 49%

“…As far as Mediterranean fi shes are concerned, patterns are variable. The available results for Symphodus roissali (Risso, 1810) did not show any relation between mortality and PLD, while results for Symphodus ocellatus (Linnaeus, 1758) showed just an opposite pattern (Raventos and MacPherson 2005).…”

Section: Discussionmentioning

confidence: 88%

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Mismatch in early life traits between settlers and recruits in a Mediterranean fish: Clue of the relevance of the settlement tail?

Franco¹

2015

Acta Ichthyol. Piscat.

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Di Franco A., Gianni F., Guidetti P. 2015. Mismatch in early life traits between settlers and recruits in a Mediterranean fi sh: Clue of the relevance of the settlement tail? Acta Ichthyol. Piscat. 45 (2): 153-159.Background. Life stage transitions (e.g., settlement and recruitment), characterized by high mortality rates, act as selective bottlenecks for fi shes with a bipartite life cycle. Mortality at these stages is usually selective and potentially affected by larval history. This process is refl ected in an inconsistency in larval traits' distribution between subsequent life stages (e.g., settlers and recruits) originating from the same reproductive season. Despite the importance of this issue only very scarce information is available about this aspect of Mediterranean fi shes life histories. Material and methods. Here we described settlement and investigated the match/mismatch of larval traits between settlers and recruits coming from the same reproductive season, using the white seabream, Diplodus sargus sargus (Linnaeus, 1758), as a model species along ~ 200 km of the Apulian Adriatic coast (south-western Adriatic Sea, Italy). Both microstructure and chemistry analyses were carried out on otoliths of settlers (n = 140) and recruits (n = 113).Results. We highlighted a mismatch in two life traits, i.e., PLD (pelagic larval duration) and natal origin, between settlers and recruits. Recruits showed PLD longer than the maximum recorded for settlers, and a higher number of natal sources compared to settlers. Mismatch in PLD could suggest selective juvenile mortality related to PLD, and recruits with higher PLD potentially originated from the settlement tail (i.e., settled after the settlement peak). Conclusion. Our fi ndings can support hypotheses suggesting that 1) a fraction of juveniles are selectively eliminated; 2) settlement tail could play a relevant role in replenishing local populations of white seabream.

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“…Size at hatching and growth rate strongly influence survival before and after settlement (Meekan & Fortier 1996), with higher survival in juveniles from large larvae (Houde 1994, Bergenius et al 2002, Shima & Findlay 2002, Tomkiewicz et al 2003, Raventos & Macpherson 2005. Moreover, predation and starvation are major factors at the larval stage (Houde 1987), and changes in morphological traits can strongly influence larval survival.…”

Section: Introductionmentioning

confidence: 99%

Maternal size effects on early life traits of the temperate fish Symphodus roissali

Raventós¹,

Planes²

2008

Aquat. Biol.

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The relative importance of maternal influences and time of reproduction on early lifehistory traits in the temperate five-spotted wrasse Symphodus roissali was examined. On 5 occasions during the reproductive period, groups of 4 small and 4 large females were collected and their eggs were fertilized with milt from 1 male. This multiple female fertilization experiment allowed the evaluation and comparison of potential contribution of maternal size on the following early life traits of progeny: egg properties (diameter and dry weight) and larval properties (larval length and dry weight). Large females (> 9 cm) produced larger eggs and larvae than did small females (< 9 cm). The differences in progeny properties between both size groups of females were maintained throughout the reproductive period, with increasing variations in larval length at the end. As juvenile survival of S. roissali is affected by larval size at hatching and this is, in turn, affected by maternal size and time of spawning, it can be concluded that the size of females plays a major role in reproductive success, with larger females maximizing the survival of the young.

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Effect of pelagic larval growth and size-at-hatching on post-settlement survivorship in two temperate labrid fish of the genus Symphodus

Cited by 57 publications

References 47 publications

Genetic Identity Determines Risk of Post-Settlement Mortality of a Marine Fish

Genetic Identity Determines Risk of Post-Settlement Mortality of a Marine Fish

Mismatch in early life traits between settlers and recruits in a Mediterranean fish: Clue of the relevance of the settlement tail?

Maternal size effects on early life traits of the temperate fish Symphodus roissali

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