Synchronous and vertically undulating swimming behaviour of Atlantic cod Gadus morhua

Björnsson, Björn Th.; Reynisson, Páll

doi:10.3354/ab00516

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…Another potential advantage of being positioned vertically in comparison to a horizontal position may be that only movement of the tail is needed to maintain the preferred depth (Miller et al ., 2014). Vertically swimming through the water column may also be an effective way to detect the layers with most dense prey, as has been suggested for vertically undulating cod (Bjornsson & Reynisson, 2013).…”

Section: Observation No Date Latitude Longitude Depth (M) Bottom Dept...mentioning

confidence: 89%

Pelagic observations of the midwater scorpionfish Ectreposebastes imus (Setarchidae) suggests a role in trophic coupling between deep‐sea habitats

Hoving

Freitas²

2021

Journal of Fish Biology

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During pelagic video transects off Santo Antão, Cabo Verde, we encountered the midwater scorpionfish Ectreposebastes imus in midwater between 300 and 800 m over a bottom depth of about 1000 m. The fish were typically positioned vertically with their heads pointing upwards. These first midwater observations of E. imus suggest migratory (potentially feeding) behaviour into the pelagic realm and hence a possible role of this species in the trophic coupling between the pelagic and benthic habitats in the deep seas of Cabo Verde and elsewhere in its global distribution.

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Section: Observation No Date Latitude Longitude Depth (M) Bottom Dept...mentioning

confidence: 89%

Pelagic observations of the midwater scorpionfish Ectreposebastes imus (Setarchidae) suggests a role in trophic coupling between deep‐sea habitats

Hoving

Freitas²

2021

Journal of Fish Biology

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“…Adult G. morhua in nature use various strategies to increase their searching efficiency, e.g. by keeping visual contact among fish in the school (Rose, 1993) and by synchronous swimming along a vertically undulating path to systematically sweep the water column (Björnsson & Reynisson, 2013). Gadus morhua, a major predator in the North Atlantic Ocean coastal and shelf areas, is well adapted to feed on pelagic fish such as capelin Mallotus villosus (Müller 1776) which form large feeding and migratory schools with a much larger horizontal than vertical distribution (Davoren et al, 2006;Olafsdottir & Rose, 2012;Vilhjálmsson, 1994).…”

Section: Schooling Behaviourmentioning

confidence: 99%

Food searching behaviour in adult Atlantic codGadus morhuaduring acoustic training: social learning and leadership within a school

Björnsson

Karlsson

Macrander

2018

Journal of Fish Biology

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Food searching behaviour in a group of individually tagged 1-5 kg Atlantic cod Gadus morhua was studied in a set of three experiments in a sea cage with two underwater platforms, where restricted amounts of food was delivered several times per day during an acoustic training period. It took c. 1 week to train 20 naïve cod to associate low frequency (250 Hz) sound with food, whereas the training time was reduced to less than 2 days when 19 naïve G. morhua were accompanied with one trained fish. The fish formed a school that cruised between the platforms in search of food. Usually, there was one leader in the school, a fish that swam faster, arrived first at the platforms and visited the platforms more frequently than other members of the school. The leader spent more energy on swimming but also received more food and grew faster than the rest of the fish. At the start of the experiments, the leaders were not larger than the average fish but always among the leanest ones in the group. The study reveals how social learning can facilitate the acoustic training in adult G. morhua, information that may be useful in finding ways to aggregate valuable fish species for environmentally friendly fishing and ranching.

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The behavioural diversity of Atlantic cod: insights into variability within and between individuals

Meager¹,

Fernö

Skjæraasen

2017

Rev Fish Biol Fisheries

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Synchronous and vertically undulating swimming behaviour of Atlantic cod Gadus morhua

Cited by 6 publications

References 39 publications

Pelagic observations of the midwater scorpionfish Ectreposebastes imus (Setarchidae) suggests a role in trophic coupling between deep‐sea habitats

Pelagic observations of the midwater scorpionfish Ectreposebastes imus (Setarchidae) suggests a role in trophic coupling between deep‐sea habitats

Food searching behaviour in adult Atlantic codGadus morhuaduring acoustic training: social learning and leadership within a school

The behavioural diversity of Atlantic cod: insights into variability within and between individuals

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