Marine community ecology: importance of trait-mediated effects propagating through complex life cycles

Giménez, Luis

doi:10.3354/meps283303

Cited by 42 publications

(34 citation statements)

References 69 publications

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“…In addition, they have an important influence in the generation of phenotypes throughout development, which are themselves under selection (Kaplan and Phillips 2006). Such effects on early developmental stages may affect the individual performance in other phases of the life history through carry-over effects (Giménez, 2004).…”

Section: Discussionmentioning

confidence: 99%

Variation in early developmental stages in two populations of an intertidal crab, Neohelice (Chasmagnathus) granulata

2008

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Duration of embryonic development, egg size, larval size at hatching, and starvation tolerance of the first zoeal stage were studied in an intertidal crab from the southwestern Atlantic, Neohelice (formerly Chasmagnathus) granulata. These reproductive traits were quantified comparing (a) two populations living in ecologically contrasting coastal habitats in Argentina, a brackish lagoon, Mar Chiquita, MC vs. an open marine habitat near San Antonio, Patagonia, SA, (b) beginning vs. end of the reproductive season, and (c) two temperatures during egg development (18 vs. 27°C). Eggs in an early stage of embryonic development were in both populations larger at the beginning than at the end of the season, and were consistently larger in the SA population. These size differences persisted through larval hatching, independent of the temperature during embryogenesis. At 18°C, eggs produced at the beginning of the season developed in both populations more rapidly than those from the end of the reproductive season, while the opposite trend was observed at 27°C. The stage duration of the zoea I was in both populations shorter at the beginning as compared to the end of the season. The nutritional flexibility of the zoea I stage was compared using as indices the point-of-reserve-saturation (PRS 50 ) and the point-of-no-return (PNR 50 ). The PRS 50 was consistently lower in larvae from SA than in those from MC. In the MC population, this index was lower at the beginning than at the end of the season, while no significant seasonal difference was observed in larvae from SA. The PNR 50 varied between temperatures of embryonic development and populations, showing also significant interactions between all three factors. The PRS 50 was on average lower, and the PNR 50 was higher, than values previously reported for N. granulata, suggesting a stronger nutritional flexibility in the larvae used in the present study. Our results indicate significant intraspecific variability among separate populations, seasonal variation, and carryover effects of environmental conditions prevailing during the embryonic phase, all of which may affect the performance of the larval phase.

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Section: Discussionmentioning

confidence: 99%

Variation in early developmental stages in two populations of an intertidal crab, Neohelice (Chasmagnathus) granulata

2008

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“…Pre-settlement resistance and vulnerability to predators, is regulated by behavior (Leis 3 and Carson-Ewart, 2001;Doherty et al, 2004), larval morphology (Morgan and Christy, 1996), 4 larval quality traits (Giménez, 2004) and chemical defense of early life stages (Johnson and 5 Strathmann, 1989;Lindquist, 2002, for a review), with consequences for success of settlement. 6…”

Section: Larval Predationmentioning

confidence: 99%

“…Larval settlement 8 behavior is particularly interesting because behavioral interventions at this stage have the 9 greatest potential to carry over to juvenile and adult stages of the life cycle (Giménez, 2004;10 Blythe and Pineda, 2009). However, the spatial scales of influence of conspecific cues may be 11 quite limited.…”

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confidence: 99%

Causes of decoupling between larval supply and settlement and consequences for understanding recruitment and population connectivity

Pineda

Porri

Starczak

et al. 2010

Journal of Experimental Marine Biology and Ecology

185

100

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Marine broadcast spawners have two-phase life cycles, with pelagic larvae and benthic adults. 2 Larval supply and settlement link these two phases and are crucial for the persistence of marine 3 populations. Mainly due to the complexity in sampling larval supply accurately, many 4 researchers use settlement as a proxy for larval supply. Larval supply is a constraining variable 5 for settlement because, without larval supply, there is no settlement. Larval supply and 6 settlement may not be well correlated, however, and settlement may not consistently estimate 7 larval supply. 8This paper explores the argument that larval supply (i.e., larval abundance near settlement sites) 9 may not relate linearly to settlement. We review the relationship between larval supply and 10 settlement, from estimates and biases in larval supply sampling, to non-behavioral and 11 behavioral components, including small-scale hydrodynamics, competency, gregarious behavior, 12 intensification of settlement, lunar periodicity, predation and cannibalism. Physical and structural 13 processes coupled with behavior, such as small-scale hydrodynamics and intensification of 14 settlement, sometimes result in under-or overestimation of larval supply, where it is predicted 15 from a linear relationship with settlement. Although settlement is a function of larval supply, 16 spatial and temporal processes interact with larval behavior to distort the relationship between 17 larval supply and settlement, and when these distortions act consistently in time and space, they 18 cause biased estimates of larval supply from settlement data. 19Most of the examples discussed here suggest that behavior is the main source of the decoupling 20 between larval supply and settlement because larval behavior affects the vertical distribution of 21 3 larvae, the response of larvae to hydrodynamics, intensification of settlement, gregariousness, 1 predation and cannibalism. Thus, larval behavior seems to limit broad generalizations on the 2 regulation of settlement by larval supply. Knowledge of the relationship is further hindered by 3 the lack of a well founded theoretical relationship between the two variables. 4The larval supply-settlement transition may have strong general consequences for population 5 connectivity, since larval supply is a result of larval transport, and settlement constrains 6 recruitment. Thus, measuring larval supply and settlement effectively allows more accurate 7 quantification and understanding of larval transport, recruitment and population connectivity. 8 9 4

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“…This shows carry-over effects of variation in larval fitness persisting from one phase of the life cycle to the next (for a recent discussion of such "trait-mediated effects", see Giménez, 2004Giménez, , 2010. Although being statistically significant, however, the negative effects of slightly suboptimal rearing conditions (low salinity and/or use of artificial salt) on larval growth and early juvenile size were generally weak.…”

Section: Discussionmentioning

confidence: 98%

Growth, elemental and proximate biochemical composition of larval Amazon River prawn, Macrobrachium amazonicum, reared under different salinity conditions

Hayd

Anger

Urzúa

2017

lajar

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ABSTRACT. In the aquaculture of prawns in inland facilities, the supply with natural seawater is technically difficult and expensive, while the use of artificial salt may be suboptimal due to unfavorable ionic composition. In the present study, Amazon River prawn, Macrobrachium amazonicum, were reared from hatching through nine larval stages to the first juvenile instar, comparing four experimental conditions with two salinities (5, 10) and two different types of salt (artificial, natural). Larval biomass growth was measured in terms of changes in dry weight (W), contents of carbon and nitrogen (C, N), and proximate biochemical composition (lipid, protein); moreover, body size (carapace length, CL) was measured in first-stage juveniles. After passing through the nonfeeding first larval stage, later stages showed an exponential increase in values of biomass per individual. Rates of increase differed significantly among treatments, showing generally lower growth in experiments with artificial vs. natural salt, and at 5 vs. 10. The same response pattern was found also in CL of early juvenile shrimps. Similar but mostly weaker effects were observed in the percentage C, N, lipid, and protein values (in % of W), and in the C: N mass ratio. Our data indicate that larval rearing of M. amazonicum is feasible with artificial salts and at lower than commonly used standard salinity (10). This makes the cultivation of this species feasible also in aquaculture facilities located at large distance from the coast, where a reduction of costs and logistic investments may compensate for reduced larval growth and production of smaller juveniles. However, these salinity effects on offspring production have to be taken into account in comparisons of growth data from different laboratories and locations.

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Marine community ecology: importance of trait-mediated effects propagating through complex life cycles

Cited by 42 publications

References 69 publications

Variation in early developmental stages in two populations of an intertidal crab, Neohelice (Chasmagnathus) granulata

Variation in early developmental stages in two populations of an intertidal crab, Neohelice (Chasmagnathus) granulata

Causes of decoupling between larval supply and settlement and consequences for understanding recruitment and population connectivity

Growth, elemental and proximate biochemical composition of larval Amazon River prawn, Macrobrachium amazonicum, reared under different salinity conditions

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