On the attraction of larval fishes to reef sounds

Mann, David A.; Casper, Brandon M.; Boyle, Kelly S.; Tricas, Timothy C.

doi:10.3354/meps338307

Cited by 76 publications

(73 citation statements)

References 29 publications

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“…In addition, reef sounds (14, 16) might help direct larvae once in the reef's close proximity. Daily tidal currents in our study area are at a 10-km scale; reef sounds have been estimated to be detectable within 1 km (25).…”

Section: Discussionmentioning

confidence: 99%

“…Otoliths are present and can provide useful directional signals in conditions where waves, both surface and internal, are predictably shore-directed (41). Reef sounds show promise for reef orientation (14,16,42,43), but we still need to know how far the acoustic reef signal extends above the noise or how it relates to the hearing frequency range of these fishes (44); it may be limited to relatively short distances (Ϸ1 km) (25). Superficial lateral line is useful for rheotactic responses (45,46), particularly in shear layers near solid surfaces and among water masses.…”

Section: Discussionmentioning

confidence: 99%

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Smelling home can prevent dispersal of reef fish larvae

Gerlach

Atema

Kingsford

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

400

371

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Many marine fish and invertebrates show a dual life history where settled adults produce dispersing larvae. The planktonic nature of the early larval stages suggests a passive dispersal model where ocean currents would quickly cause panmixis over large spatial scales and prevent isolation of populations, a prerequisite for speciation. However, high biodiversity and species abundance in coral reefs contradict this panmixis hypothesis. Although ocean currents are a major force in larval dispersal, recent studies show far greater retention than predicted by advection models. We investigated the role of animal behavior in retention and homing of coral reef fish larvae resulting in two important discoveries: (i) Settling larvae are capable of olfactory discrimination and prefer the odor of their home reef, thereby demonstrating to us that nearby reefs smell different. (ii) Whereas one species showed panmixis as predicted from our advection model, another species showed significant genetic population substructure suggestive of strong homing. Thus, the smell of reefs could allow larvae to choose currents that return them to reefs in general and natal reefs in particular. As a consequence, reef populations can develop genetic differences that might lead to reproductive isolation.coral reef ͉ olfaction ͉ population genetics

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Smelling home can prevent dispersal of reef fish larvae

Gerlach

Atema

Kingsford

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

400

371

View full text Add to dashboard Cite

show abstract

“…It was assumed that the potential settlers would be able to hear the ambient noise from OTI if they were within 1 km of the reef (Mann et al, 2007). The number of potential settlers were therefore counted within a rectangular capture box, with bounds located 1 km to the north, south and east of OTI.…”

Section: Quantifying the Modeling Resultsmentioning

confidence: 99%

“…The larvae of many fish species can maintain swim speeds that exceed local mean current speeds for extended periods of time, they can, therefore, influence their dispersal trajectories (Fisher, 2005;Leis, 2006). They can also orient to reefs using a variety of senses including a sun compass (e.g., Leis and Carson-Ewart, 2003;Mouritsen et al, 2013) and a magnetic compass (e.g., Bottesch et al, 2016) for long distance orientation, and hearing (e.g., Mann et al, 2007;Wright et al, 2010) and chemotaxis (e.g., Gerlach et al, 2007;Dixson et al, 2008;Paris et al, 2013) when they are closer to reefs. The exceptional swimming and orientation abilities of reef fish larvae, in combination with hydrodynamic retention mechanisms near reefs, may prevent the expatriation of some larvae away from natal reefs (Almany et al, 2007;Andutta et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Wind Conditions on the Great Barrier Reef Influenced the Recruitment of Snapper (Lutjanus carponotatus)

et al. 2018

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Most coral reef fishes have a pelagic larval stage before recruiting to reefs. The survival of larvae and their subsequent recruitment can drive the dynamics of reef populations. Here we show that the recruitment of the snapper Lutjanus carponotatus to One Tree Island in the Capricorn Bunker Group, in the southern Great Barrier Reef, was highly variable over 23 years. We predicted that the currents in the Capricorn Bunker Group, including their wind driven components and the Capricorn Eddy (a nearby transient oceanic eddy), would affect patterns of recruitment. A biophysical model was used to investigate this prediction. L. carponotatus were collected from One Tree Island and the dates when they were in the plankton as larvae were determined from their otoliths. The winds present during the pelagic phases of the fish were examined; they were found to have survived either longshore (SSE) winds that induced little cross shelf movement in the larval plume or cross shelf (ENE) winds that induced little longshore movement. The unidirectional transportation of the larval plume in these conditions was favorable for recruitment as it kept the plume concentrated in the Capricorn Bunker Group. These winds were more prevalent in the periods of peak L. carponotatus production that preceded high recruitment. Dispersal under average winds (6.2 m s −1 from the prevailing ESE) and strong winds (velocity 1.5 times average), with and without the Capricorn Eddy, was also modeled. Each of these combinations were less favorable for recruitment than the longshore and cross shelf winds larval L. carponotatus survived before reaching OTI. The larval plume was comparatively less concentrated in the Capricorn Bunker Group under average winds. Strong winds transported the larval plume far longshore, to the NW, away from the Capricorn Bunker Group, while the Capricorn Eddy transported larvae seaward into oceanic waters. Larval swimming could counteract these dispersive forces; however, significant dispersion had occurred before larvae developed strong swimming and orientation abilities. This study provides a physical proxy for the recruitment of snapper. Further, we have demonstrated that great insights into recruitment variability can be gained through determining the specific conditions experienced by survivors.

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“…Loud choruses of reef sounds may be detectable from hundreds to thousands of meters from the reef (Radford et al, 2011b;Mann et al, 2007;Cato, 1980). A study by Egner and Mann (2005) proposed that sergeant major damselfish (Abudefduf saxatilis) would likely be able to use coral reef sounds as a significant navigation cue up to 500 m away.…”

Section: Introductionmentioning

confidence: 99%

Coral reef soundscapes : spatiotemporal variability and links to species assemblages

Kaplan¹

2017

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Coral reefs are biodiverse ecosystems that are at risk of degradation as a result of environmental changes. Reefs are constantly in a state of flux: the resident species assemblages vary considerably in space and time. However, the drivers of this variability are poorly understood. Tracking these changes and studying how coral reefs respond to natural and anthropogenic disturbance can be challenging and costly, particularly for reefs that are located in remote areas. Because many reef animals produce and use sound, recording the ambient soundscape of a reef might be one way to efficiently study these habitats from afar. In this thesis, I develop and apply a suite of acoustics-based tools to characterize the biological and anthropogenic acoustic activity that largely comprises marine soundscapes. First, I investigate links between reef fauna and reef-specific acoustic signatures on coral reefs located in the U.S. Virgin Islands. Second, I compare those findings to a more expansive study that I conducted in Maui, Hawaii, in which the drivers of bioacoustic differences among reefs are explored. Third, I investigate the distances over which sounds of biological origin may travel away from the reef and consider the range within which these acoustic cues might be usable by pelagic larvae in search of a suitable adult habitat. Fourth, I assess the extent to which the presence of vessel noise in shallow-water habitats changes the ambient soundscape. Finally, I present the results of a modeling exercise that questions how ocean noise levels might change over the next two decades as a result of major projected increases in the number and size of and distance traveled by commercial ships. The acoustics-based tools presented here help provide insight into ecosystem function and the extent of human activity in a given habitat. Additionally, these tools can be used to inform an effective regulatory regime to improve coral reef ecosystem management.

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On the attraction of larval fishes to reef sounds

Cited by 76 publications

References 29 publications

Smelling home can prevent dispersal of reef fish larvae

Smelling home can prevent dispersal of reef fish larvae

Wind Conditions on the Great Barrier Reef Influenced the Recruitment of Snapper (Lutjanus carponotatus)

Coral reef soundscapes : spatiotemporal variability and links to species assemblages

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