Indications for substrate preferences in juvenile hatchery-reared great sturgeon, Huso huso

Falahatkar, Bahram; Shakoorian, M.

doi:10.1111/j.1439-0426.2011.01695.x

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…Importantly, some other species do not always prefer structural enrichment. Beluga sturgeon Huso huso (Acipeseridae) juveniles generally prefer smooth bottoms, for example, concrete, over gravel (Falahatkar and Shakoorian ). This may be an effect of an overall preference for plain sandy substrates, a bottom type which was not present in the study, but shown to be strongly preferred by another sturgeon species (Peake ).…”

Section: Preferences: What Do the Fishes Actually Want?mentioning

confidence: 99%

Environmental enrichment for fish in captive environments: effects of physical structures and substrates

2014

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Structural environmental enrichment, that is, a deliberate addition of physical complexity to the rearing environment, is sometimes utilized to reduce the expression of the undesirable traits that fish develop in captivity. Increasing demands and regulations regarding usage of enrichment to promote fish welfare also make investigations on the effects of enrichment important. Here, we sythesize the current state‐of‐the‐art knowledge about the effects of structural environmental enrichment for fish in captive environments. We find that enrichment can affect several aspects of the biology of captive fish, for example, aggression, stress, energy expenditure, injury and disease susceptibility. Importantly, these effects are often varying in direction and magnitude, and it is clear that just addition of structure is not a solution to all problems in fish rearing. Each species and life stage needs special consideration with respect to its natural history and preferences. A multitude of different enrichment types has been investigated and many studies investigate several enrichment components at the same time, making comparisons among studies difficult. To the present date, the majority of efforts have been directed to investigate salmonid fish in stock‐fish hatcheries and cichlids from a basic research perspective. Some contexts are under‐studied with respect to environmental enrichment, for instance effects on results in basic research and welfare effects in display aquaria. There are many research opportunities left within this field. However, future studies could utilize experimental designs which make it possible to discriminate between effects of different environmental manipulations to a higher degree than what has been performed to this date.

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Section: Preferences: What Do the Fishes Actually Want?mentioning

confidence: 99%

Environmental enrichment for fish in captive environments: effects of physical structures and substrates

2014

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“…Nguyen and Crocker (2006) found larvae of white sturgeon distributed among substrates, which included clean gravel and cobble. Falahatkar and Shakoorian (2011) confirmed that juvenile great sturgeon mostly prefer a flat, concrete bottom versus other substrate types in an aquaculture environment. Chai, Huang, Zhu, Yang, and Wu (2019) found that larvae of Schizothorax wangchiachii have different substrate preferences at different growth stages.…”

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confidence: 56%

Investigation and preliminary laboratory study on substrate preference of Schizothorax lantsangensis

Bai

Lin

Huang

et al. 2021

River Research & Apps

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The destruction of fish habitat is one of the most important factors in the decline of fish stocks. Substrate is a major component of fish habitat. We examined the substrate preferences of wild adult Schizothorax lantsangensis using both field investigation and laboratory experiments. Field investigation showed that the substrate of S. lantsangensis habitat in parts of the Lancang River consists mainly of sand, gravel, and pebbles. The substrate was categorized into six types according to the particle size using the modified Wentworth classification: sand and silt (diameter < 2 mm), gravel (diameter 2.1-16 mm), pebble (diameter 16.1-32 mm), cobble (diameter 32.1-64 mm), small boulder (diameter 64-128 mm), and boulder (diameter > 128 mm). The substrate preference of S. lantsangensis was determined in the laboratory, using a single factor test, by comparing the residence times of fish in each of six substrates during different time periods. The results showed that S. lantsangensis preferred pebble and cobble substrates. This study provides a reference for the creation of artificial substrate in habitat restoration in the Lancang River.

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“…In the present study, the endless channel prevented the end effect (Falahatkar & Shakoorian, ) and allowed fish to swim upstream or downstream without encountering a wall and being forced to turn around. Schools of juveniles swam upstream and downstream in the channel, and the benefit of using an endless channel with no “end effect” was most evident when fish schools swam several loops around the channel in one direction.…”

Section: Discussionmentioning

confidence: 98%

Preference by juvenile Chinese sucker Myxocyprinus asiaticus, for substrate colour in zero versus slow velocity regimes suggest a change in habitat preference of wild juveniles after damming the Yangtze river

Shi

Chen

Kynard

et al. 2017

River Research & Apps

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Habitat preference of benthic riverine juvenile Chinese sucker, Myxocyprinus asiaticus, a protected species in China, is poorly understood. This situation makes it difficult to evaluate the potential impacts on juveniles after river alteration. To better understand the impact of damming, we studied preference of cultured juvenile Chinese sucker (7.90-8.55 cm, standard length) for dark versus light substrate colours in 2 velocity regimes: zero velocity (like on a reservoir bottom) and in a slow water current of 0.15-0.19 cm/s (like on the bottom of a slow flowing stream). In the slow current regime, juveniles chose black substrate during the day and night. This likely represents the natural substrate preference by wild suckers in a river. However, in the zero velocity regime, juveniles chose a black substrate during the day, but switched preference to a white substrate at night. The results suggest wild juveniles in the natural Yangtze River have evolved a preference for a black substrate during the day and night. However, after the river was impounded by the Three Gorges Dam and bottom velocity changed to a static regime, juveniles in the reservoir changed substrate colour preference and now prefer a light-coloured substrate colour at night. Thus, damming likely caused a major behavioural change by juveniles.The adaptive significance and effect on fitness of this change in habitat preference is not known but should be investigated as wild Chinese sucker continue to decline in abundance. KEYWORDSdamming effects on fish, fish behaviour, fish life history, habitat preference

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Indications for substrate preferences in juvenile hatchery-reared great sturgeon, Huso huso

Cited by 7 publications

References 13 publications

Environmental enrichment for fish in captive environments: effects of physical structures and substrates

Environmental enrichment for fish in captive environments: effects of physical structures and substrates

Investigation and preliminary laboratory study on substrate preference of Schizothorax lantsangensis

Preference by juvenile Chinese sucker Myxocyprinus asiaticus, for substrate colour in zero versus slow velocity regimes suggest a change in habitat preference of wild juveniles after damming the Yangtze river

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