Natural mortality of marine invertebrate larvae

Rumrill, Steven S.

doi:10.1080/00785236.1990.10422030

Cited by 443 publications

(343 citation statements)

References 155 publications

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“…Moreover, our simulations did not include any sources of mortality during dispersal or other biotic or abiotic processes that can negatively affect larval transport and recruitment [4]. Larval survival in the plankton has not been measured for most benthic invertebrates, but it is expected to be low (<10%) [27]. Lenihan et al [28] showed that dense patches of the mussel B. thermophilus significantly reduced the number of settlers or surviving recruits through inter-or intra-specific competition and predation.…”

Section: Discussionmentioning

confidence: 99%

Biophysical and Population Genetic Models Predict the Presence of “Phantom” Stepping Stones Connecting Mid-Atlantic Ridge Vent Ecosystems

et al. 2016

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Section: Discussionmentioning

confidence: 99%

Biophysical and Population Genetic Models Predict the Presence of “Phantom” Stepping Stones Connecting Mid-Atlantic Ridge Vent Ecosystems

et al. 2016

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“…The internal production of TH could dampen the plastic effects of temporary food fluctuations in the environment, as well as those that we see in the laboratory. Furthermore, planktotrophic echinoderm larvae developing from relatively large eggs could undergo metamorphosis more quickly, thereby escaping the dangerous planktonic environment (Rumrill 1990;see Morgan 1995) only if they do not depend upon feeding in the plankton to obtain all of the required TH. These hypotheses make a testable prediction: the ability to synthesize TH endogenously is inversely proportional to the scope of plasticity, and directly proportional to egg size in a given taxon.…”

Section: Thyroid Hormones and Life-history Evolution In Echinodermsmentioning

confidence: 99%

“…Due to high mortality in plankton, reduction of the planktonic period should generally be advantageous (Rumrill 1990; for review see Morgan 1995). However, a reduced larval period could lead to a reduced juvenile size (or a reduction in stored energy, as discussed above), which might have negative fitness consequences.…”

Section: Thyroid Hormones As An Indicator Of Larval Nutrition: Implicmentioning

confidence: 99%

Heterochronic Developmental Shift Caused by Thyroid Hormone in Larval Sand Dollars and Its Implications for Phenotypic Plasticity and the Evolution of Nonfeeding Development

Heyland

Hodin

2004

Evolution

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Abstract. Recent work on a diverse array of echinoderm species has demonstrated, as is true in amphibians, that thyroid hormone (TH) accelerates development to metamorphosis. Interestingly, the feeding larvae of several species of sea urchins seem to obtain TH through their diet of planktonic algae (exogenous source), whereas nonfeeding larvae of the sand dollar Peronella japonica produce TH themselves (endogenous source). Here we examine the effects of TH (thyroxine) and a TH synthesis inhibitor (thiourea) on the development of Dendraster excentricus, a sand dollar with a feeding larva. We report reduced larval skeleton lengths and more rapid development of the juvenile rudiment in the exogenous TH treatments when compared to controls. Also, larvae treated with exogenous TH reached metamorphic competence faster at a significantly reduced juvenile size, representing the greatest reduction in juvenile size ever reported for an echinoid species with feeding larvae. These effects of TH on D. excentricus larval development are strikingly similar to the phenotypically plastic response of D. excentricus larvae reared under high food conditions. We hypothesize that exogenous (algae-derived) TH is the plasticity cue in echinoid larvae, and that the larvae use ingested TH levels as an indicator for larval nutrition, ultimately signaling the attainment of metamorphic competence. Furthermore, our experiments with the TH synthesis inhibitor thiourea indicate that D. excentricus larvae can produce some TH endogenously. Endogenous TH production might, therefore, be a shared feature among sand dollars, facilitating the evolution of nonfeeding larval development in that group. Mounting evidence on the effects of thyroid hormones in echinoderm development suggests life-history models need to incorporate metamorphic hormone effects and the evolution of metamorphic hormone production.

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“…Throughout larval development they are exposed to a combination of factors that affect their survival. Estimates of larval mortality in the field for decapod larvae are equivalent to an average instantaneous mortality rate of 7% per day (Rumrill, 1990).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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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.

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Natural mortality of marine invertebrate larvae

Cited by 443 publications

References 155 publications

Biophysical and Population Genetic Models Predict the Presence of “Phantom” Stepping Stones Connecting Mid-Atlantic Ridge Vent Ecosystems

Biophysical and Population Genetic Models Predict the Presence of “Phantom” Stepping Stones Connecting Mid-Atlantic Ridge Vent Ecosystems

Heterochronic Developmental Shift Caused by Thyroid Hormone in Larval Sand Dollars and Its Implications for Phenotypic Plasticity and the Evolution of Nonfeeding Development

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

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