Measurement of background‐visual field in flatfishes by CRT display method

Fujimoto, Masaaki; Satoh, Yukari; Morishita, Fumihiro

doi:10.1080/10236249209378815

Cited by 8 publications

(7 citation statements)

References 6 publications

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“…5(b)]. Taken together, flatfishes should generally have a wider binocular view towards their dorsal margin than their ventral margin when looking anteriorly (Fujimoto et al , 1992).…”

Section: Discussionmentioning

confidence: 99%

“…Because both eyes are protrusible and independently moveable, one benefit of this arrangement is a nearly 360°combined field of view (Gibson, 2005). In the few flatfish species that have been studied, however, binocular vision is limited to 40-50°anteriorly and c. 10°posteriorly (Gibson, 2005), although this varies among species (Fujimoto et al, 1992). In addition, unlike most other fishes, FIG. 3.…”

Section: Discussionmentioning

confidence: 99%

“…180° anteriorly (Cobcroft & Pankhurst, 2006), the few visually oriented flatfish species that have been studied have visual fields approaching 360°, with a binocular field of view of c . 40° anteriorly (Fujimoto et al , 1992). Visual acuity may shift between monocular and binocular fields of view, with improved depth perception in the latter.…”

Section: Introductionmentioning

confidence: 99%

“…Mixed flatfish foragers tend to use a combination of visual and olfactory cues to identify prey (de Groot, 1971;Gibson, 2005), and swim on or just above the bottom for short, discontinuous bursts during active searching. Compared to symmetrical teleosts that have primarily monocular visual fields of c. 180°anteriorly (Cobcroft & Pankhurst, 2006), the few visually oriented flatfish species that have been studied have visual fields approaching 360°, with a binocular field of view of c. 40°anteriorly (Fujimoto et al, 1992). Visual acuity may shift between monocular and binocular fields of view, with improved depth perception in the latter.…”

Section: Introductionmentioning

confidence: 99%

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Which way to turn? Effect of direction of body asymmetry on turning and prey strike orientation in starry flounder Platichthys stellatus (Pallas) (Pleuronectidae)

Bergstrom

Palmer

2007

Journal of Fish Biology

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Starry flounder Platichthys stellatus, a rare polymorphic flatfish exhibiting a large-scale geographic cline in the frequency of right-eyed (dextral) and left-eyed (sinistral) morphs, was studied to investigate whether foraging behaviour (turning angle and prey strike orientation) differed between dextral and sinistral laboratory-raised juveniles. Platichthys stellatus foraging on brine shrimp Artemia sp. nauplii tended to strike dorsally at prey ('left' to an observer for dextral flounder and 'right' to an observer for sinistral flounder), although this effect was stronger for sinistral fish. This dorsal tendency also increased with body size. Non-strike behaviours (movements between strikes) were ventrally biased for both morphs. Maximum turn angles were larger for both morphs towards the dorsal side than the ventral side during prey strikes but were the same during non-strike behaviours. The positioning of the eyes of the juvenile starry flounder was skewed towards the dorsal midline rather than being symmetrically placed between dorsal and ventral margins on the eyed side of each fish. The migrating eyes of dextral fish, however, were significantly closer to the dorsal midline than in sinistral fish. This, in addition to the more dorsally oriented prey strikes in sinistral fish, suggests that the morphs are not simple behavioural mirror images of one another and therefore may differ ecologically.

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“…5(b)]. Taken together, flatfishes should generally have a wider binocular view towards their dorsal margin than their ventral margin when looking anteriorly (Fujimoto et al , 1992).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Which way to turn? Effect of direction of body asymmetry on turning and prey strike orientation in starry flounder Platichthys stellatus (Pallas) (Pleuronectidae)

Bergstrom

Palmer

2007

Journal of Fish Biology

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“…There is some evidence that the use of a circular detection area is a good representation of reality. Flatfishes have a visual field of at least 290° excluding a blind spot immediately behind the non‐migrated eye (Fujimoto et al ., 1992). If any prey were present, a capture was recorded and the grid point which contained the prey item closest to the predator's position changed to the prey‐absent state for 1000 predator movements, after which it reverted to the prey‐present state.…”

Section: Methodsmentioning

confidence: 99%

The efficiency of adaptive search tactics for different prey distribution patterns: a simulation model based on the behaviour of juvenile plaice

Hill¹,

Burrows²,

Hughes³

2003

Journal of Fish Biology

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Juvenile plaice Pleuronectes platessa are particularly useful for studying forager search behaviour because their search paths are essentially two dimensional, and punctuated by natural stops. Their prey occur in a range of natural distributions from highly aggregated to overdispersed. Juvenile plaice use area-restricted search near aggregated prey and extensive search, consisting of longer moves and fewer turns, between aggregations and when searching for dispersed prey. They search for less conspicuous prey items mainly in the pauses between movements. This saltatory search behaviour contrasts with the continuous search that is usually assumed in search models. A simulation model of saltatory search behaviour showed that a strategy combining extensive and intensive search allows the efficient exploitation of a range of natural prey distribution patterns, and that it is particularly effective when the search behaviour is controlled by perceived prey density. This allows the predator to respond to the localized aggregations which often occur in nature. The selective use of intensive search was more efficient than the continuous use of extensive search even in prey distribution patterns that were statistically over-dispersed.

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The Behaviour of Flatfishes

Gibson¹

2005

Flatfishes

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Measurement of background‐visual field in flatfishes by CRT display method

Cited by 8 publications

References 6 publications

Which way to turn? Effect of direction of body asymmetry on turning and prey strike orientation in starry flounder Platichthys stellatus (Pallas) (Pleuronectidae)

Which way to turn? Effect of direction of body asymmetry on turning and prey strike orientation in starry flounder Platichthys stellatus (Pallas) (Pleuronectidae)

The efficiency of adaptive search tactics for different prey distribution patterns: a simulation model based on the behaviour of juvenile plaice

The Behaviour of Flatfishes

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