Visual acuity and feeding in larval <i>Premnas biaculeatus</i>

Job, Suresh; Bellwood, David R.

doi:10.1111/j.1095-8649.1996.tb01489.x

Cited by 38 publications

(58 citation statements)

References 22 publications

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“…For coral reef fishes, recent findings have shown that larvae have well-developed sensory abilities and may have the potential to locate reefs and actively search for suitable settlement sites (see recent reviews by Montgomery et al 2001, Kingsford et al 2002, Leis & McCormick 2002. On small scales, both visual (Job & Bellwood 1996 and chemosensory (Arvedlund & Nielsen 1996, Arvedlund et al 1999 cues may be used for active habitat selection by settling larvae. On a larger scale, several in situ experiments have demonstrated that late-stage larvae are capable of responding to the presence of reefs at considerable distance (Leis et al 1996, Leis & Carson-Ewart 1999.…”

Section: Amphiprion Melanopus Amphiprion Percula Pomacentrus Moluccensismentioning

confidence: 99%

Swimming speeds of larval coral reef fishes: impacts on self-recruitment and dispersal

Fisher¹

2005

Mar. Ecol. Prog. Ser.

132

134

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The dispersal of larvae during their time in the pelagic environment is critically important to our understanding of marine populations. Recent publications have highlighted the potential importance of larval behaviour in influencing dispersal patterns of larval reef fishes. However, it has not been clearly established if their abilities are of a magnitude comparable to the potential effects of oceanic processes and whether larval behaviour is sufficient to facilitate self-recruitment. This study presents new data on the swimming speed of late-stage larvae to determine how they can swim relative to oceanic currents. The families examined comprised the Acanthuridae, Siganidae, Lutjanidae, Lethrinidae, Pomacentridae, Chaetodontidae, Nemipteridae, Monacanthidae, Psuedochromidae, Pomacanthidae and Apogonidae. The late-stage larvae of all reef fish families examined were able to swim at speeds greater than the mean transport speeds reported around reefs in most locations. However, even the best-swimming reef fish families could not swim faster than the maximum current speeds reported. Based on new and previously published data it appears that the development of swimming ability can be described adequately (80% of variation explained) as a linear increase from zero at hatching to a species-specific maximum at settlement. Calculations based on this developmental pattern suggest that most reef fish families could substantially influence their dispersal patterns relative to ocean currents for over 50% of their larval phase. For all families examined, swimming behaviour could potentially affect dispersal patterns on a magnitude similar to the dispersing effect of oceanic currents. In addition, the swimming capabilities of several reef fish families have the potential to facilitate active self-recruitment in a range of reef systems.

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Section: Amphiprion Melanopus Amphiprion Percula Pomacentrus Moluccensismentioning

confidence: 99%

Swimming speeds of larval coral reef fishes: impacts on self-recruitment and dispersal

Fisher¹

2005

Mar. Ecol. Prog. Ser.

132

134

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“…Although larvae exhibit some degree of shrinkage (approx. 10%), this varies among ages and parameters (Job & Bellwood 1996). For consistency, all values are based on raw (non-corrected) measurements.…”

Section: Methodsmentioning

confidence: 99%

Development of swimming abilities in reef fish larvae

Fisher¹,

Bellwood²,

Job³

2000

Mar. Ecol. Prog. Ser.

219

189

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Recent studies have revealed that reef fish larvae have excellent sustained swimming capabilities and considerable potential for modifying their dispersal patterns by active swimming. However, these studies concentrate solely on the late pelagic phase. We examined the development of swimming abilities from hatching through to settlement in 3 reef fish species (Pomacentrus amboinensis, Sphaeramia nematoptera, Amphiprion melanopus). Larval rearing provided larvae at all stages of development. Experiments were conducted in flow chambers designed for measuring the critical and sustained swimming capability of young larvae. In all 3 species, critical swimming ability increased steadily with age, size, relative propulsive area and developmental stage of the larvae. In contrast, sustained swimming ability showed a marked inflection during development. Differences among species throughout development appear to reflect variations in the developmental patterns of the 3 species. Propulsive area was highly correlated with swimming ability and may prove useful for estimating swimming capabilities among species. The results suggest that some species have the potential to actively modify their dispersal patterns from an early age.

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“…The temperature and photoperiod are similar to conditions on the Great Barrier Reef lagoon during the summer peak reproductive period. Larvae were reared using a modification of the techniques described in Job et al (1997). Larvae were fed with freshly collected size-sorted wild-caught zooplankton throughout the larval stage to ensure that there was no conditioning to abnormal prey items (e.g., rotifers).…”

Section: Methodsmentioning

confidence: 99%

“…Shrinkage was estimated to be approximately 10% except for the lens diameter, where shrinkage was assumed to be negligible (cf. Job and Bellwood 1996). Measurements were adjusted for shrinkage prior to the analyses.…”

Section: Methodsmentioning

confidence: 99%

Light sensitivity in larval fishes: Implications for vertical zonation in the pelagic zone

Job

Bellwood

2000

Limnology & Oceanography

104

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Larval fishes exhibit marked vertical zonation patterns that are important in planktonic predator-prey interactions. This zonation has been related to both proximate physical (e.g., light intensity) and ultimate biological factors (e.g., predator risk, prey availability). We hypothesize that changes in visual sensitivity and feeding performance in larval fishes provide a constraint on depth distributions and that this constraint may represent the major determinant of vertical distribution patterns. To test the generality of the relationship between larval age and visual sensitivity, larvae were obtained from captive breeding adults of seven species (three Apogonidae and four Pomacentridae). The lowest light intensity at which feeding behavior occurred was measured using infrared video techniques with natural prey items. The visual sensitivity of the larvae, measured as initiation of feeding, increased by about 3 orders-of-magnitude during the larval phase. The abilities of the larvae were broadly similar within families, but there were marked differences between families. Pomacentrids were about an order-of-magnitude less light-sensitive than apogonids. Larval apogonids are potentially capable of feeding at a depth of about 100 m in clear tropical waters at 4 mm standard length (SL) and to 200 m at 12 mm SL. The patterns of ontogenetic and phylogenetic differences in light sensitivity are consistent with field observations on the vertical distributions of larvae in these taxa.

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Visual acuity and feeding in larval Premnas biaculeatus

Cited by 38 publications

References 22 publications

Swimming speeds of larval coral reef fishes: impacts on self-recruitment and dispersal

Swimming speeds of larval coral reef fishes: impacts on self-recruitment and dispersal

Development of swimming abilities in reef fish larvae

Light sensitivity in larval fishes: Implications for vertical zonation in the pelagic zone

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