The Hydrodynamics of Chemical Cues Among Aquatic Organisms

Webster, D. R.; Weissburg, Marc J.

doi:10.1146/annurev.fluid.010908.165240

Cited by 122 publications

(111 citation statements)

References 84 publications

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“…An upturn in metabolic rate is also the most likely explanation to the twofold increase in embryo development rate when rearing temperature was increased from 7-8 • C to 11-12 • C in this study. The gentle water movement caused by the shaking table likely had none to very marginal effects on the development rate since at this low Reynolds number (<<1, moving with the flow), the effect on the diffusive boundary layer surrounding the embryos should be slight (e.g., Webster and Weissburg, 2009). A faster embryo development rate will in turn shorten the pre-competency period from 3 to 5 weeks and this study) to c. 2 weeks.…”

Section: Effects Of Larval Development Rate and Behavior On Dispersalmentioning

confidence: 72%

Larval Behavior and Longevity in the Cold-Water Coral Lophelia pertusa Indicate Potential for Long Distance Dispersal

Strömberg

Larsson

2017

Front. Mar. Sci.

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The life cycle of many marine benthic species includes a pelagic larval stage that governs the connectivity between populations. Larval transport is a function of hydrodynamic and biological processes. Knowledge of how larval traits affect dispersal will increase the accuracy of biophysical models used to predict connectivity, and is of paramount importance for management and conservation. This study examines the larval traits of the cold-water coral Lophelia pertusa that forms widespread and highly diverse ecosystems in the deep ocean. We monitored development, swimming behavior, and survival under different environmental conditions. We found that the embryonic development rate doubled when the rearing temperature was increased from normal conditions of 7-8 • C to 11-12 • C. Pre-competent planulae migrated vertically upwards at a speed of 0.5-0.7 mm s −1 and crossed salinity gradients with a maximum tested difference of 5 psu with no hesitation. At 3 weeks, planulae had a fully developed mouth and started feeding on animal derivatives, picoplankton, and possibly smaller size microalgae. Presence of food significantly altered the swimming pattern, and feeding was corroborated by direct observation. Planulae survived for up to 10 months in a salinity of 25 psu, which together with the vertical migration pattern and feeding indicates that larvae may spend a period of their pelagic phase in the photic zone. After 50 days, larvae were still in a very good condition as deduced by maintained high swimming speed. Survival rate of developed planulae was on average 60% over a 3-month period, and maximum longevity was a full year, in laboratory cultures.

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Section: Effects Of Larval Development Rate and Behavior On Dispersalmentioning

confidence: 72%

Larval Behavior and Longevity in the Cold-Water Coral Lophelia pertusa Indicate Potential for Long Distance Dispersal

Strömberg

Larsson

2017

Front. Mar. Sci.

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“…These observations have led to the study of turbulence in a more deterministic way and the identification of characteristic coherent flow structures (CFS) in gravel-bed rivers, including eddies of various scales and types that are distributed partly as a function of relative submergence and flow Reynolds number (see Ashworth et al 1996;Roy et al 2004). It is CFS that entrain, transport and mix chemical signals in rivers, resulting in chemical plumes becoming intermittent and concentrated into spatially and temporally discrete volumes that have been called 'parcels' 'streets', 'filaments' or 'vortices' of odour, separated by odourless water (Atema et al 1991;Zimmer and Butman 2000;Webster and Weissburg 2009). These odour vortices create trails that can be tracked by animals to their source on the scale of centimetres to metres.…”

Section: Flow Direction and Turbulencementioning

confidence: 99%

“…Whilst plumes of odour have been identified, quantitative study remains relatively limited, and is dominated by studies in marine settings where water is deep relative to the substrate roughness (see Webster and Weissburg 2009 and references therein). In rivers, relevant work has been undertaken on the dispersion and mixing of chemical plumes for other purposes, such as the dispersion of plumes of effluent (Roberts and Webster 2002).…”

Section: Flow Direction and Turbulencementioning

confidence: 99%

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Animal perception in gravel-bed rivers: scales of sensing and environmental controls on sensory information

Johnson

Rice

2014

Can. J. Fish. Aquat. Sci.

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Animals make decisions based on the sensory information that they obtain from the environment and other organisms within that environment. In a river, this information is transported, transmitted, masked, and filtered by fluvial factors and processes, such as relative roughness and turbulent flow. By interpreting the resultant signals, animals decide on the suitability of habitat and their reaction to other organisms. While a great deal is known about the sensory biology of animals, only limited attention has been paid to the environmental controls on the propagation of sensory information within rivers. Here, the potential transport mechanisms and masking processes of the sensory information used by animals in gravel-bed rivers are assessed by considering how the physical nature of sensory signals are affected by river hydromorphology. In addition, the physical processes that animals have the potential to directly perceive are discussed. Understanding the environmental phenomena that animals directly perceive will substantially improve understanding of what controls animal distributions, shifting emphasis from identifying correlations between biotic and abiotic factors to a better appreciation of causation, with benefits for successful management.

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“…In the vast and dilute marine environment, organisms employ diverse strategies to overcome the challenges of communication between, and recognition of, conspecifics (Hay, 2009;Webster and Weissburg, 2009). Waterborne compounds that are produced, released, and received in the sea may seem to be the most obvious way to establish interactions (Atema, 1995).…”

Section: Introductionmentioning

confidence: 99%

Crepidula Slipper Limpets Alter Sex Change in Response to Physical Contact with Conspecifics

Carrillo-Baltodano

Collin

2015

The Biological Bulletin

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Abstract. Chemical signaling, especially signaling with waterborne cues, is an important mode of communication between conspecifics of aquatic organisms. Although conspecific associations play an important role in sex allocation of sequential hermaphroditic slipper limpets, the mode of signaling is unknown. We tested the hypothesis that the effects of conspecifics on animal size and time of sex change in the tropical slipper limpet Crepidula cf. marginalis are mediated by waterborne cues. In our experiment, pairs of snails (one small and one large) were kept in cups, either together or partitioned off with fine or coarse mesh, or partitioned, but switched from side to side to allow contact with the cup mate's pedal mucus. The larger snails that were allowed contact with the smaller companions grew faster, and generally changed sex sooner, than did the larger snails in the barrier treatments, which allowed no physical contact. The smaller snails that were allowed contact with the larger cup mate delayed sex change compared to those separated from their cup mates. We were, therefore, able to reject the hypothesis that waterborne cues mediate communication between these snails. Our results suggest that the cue that affects size and time to sex change requires some kind of physical interaction that is lost when the snails are separated. Furthermore, contact with another snail's pedal mucus does not compensate for the loss of physical contact. Since males often attach to the shell of larger females, direct contact may mediate this kind of physical interaction via positional information, physical stimulation, or contactbased chemical communication. Whatever the cue, contact with conspecifics influences both partners, resulting in, surprisingly, a higher growth rate in the larger animal and delayed sex change in the smaller animal.

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The Hydrodynamics of Chemical Cues Among Aquatic Organisms

Cited by 122 publications

References 84 publications

Larval Behavior and Longevity in the Cold-Water Coral Lophelia pertusa Indicate Potential for Long Distance Dispersal

Larval Behavior and Longevity in the Cold-Water Coral Lophelia pertusa Indicate Potential for Long Distance Dispersal

Animal perception in gravel-bed rivers: scales of sensing and environmental controls on sensory information

Crepidula Slipper Limpets Alter Sex Change in Response to Physical Contact with Conspecifics

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