Social isolation impairs feed intake, growth and behavioural patterns of catfish under culture conditions

Ojelade, Oluwaseun C.; Iyasere, Oluwaseun S.; Durosaro, Samuel O.; Abdulraheem, I.; Akinde, A

doi:10.1016/j.animal.2022.100521

Cited by 3 publications

(5 citation statements)

References 30 publications

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“…This result is in line with the findings of Lee et al ( 9 ) and Xu et al ( 67 ) that reported an increase in the feed response and growth rate of zebrafish and rare minnows fish exposed to different forms of environmental enrichment. Moreover, the time of feeding during the day (morning vs. evening) had no significant effect on the feed response of C. gariepinus exposed to the different forms of environmental enrichment during the study ( 54 ). However, Zhang et al ( 12 ) and Gregory and Wood ( 71 ) noted an inverse relationship between the presence of environmental enrichment and the feed response of juvenile Blackrock fish and rainbow trouts.…”

Section: Discussionmentioning

confidence: 98%

“…The similar condition factor reported in C. gariepinus at the different enrichment levels at the beginning and end of the culture period showed that the condition factor of the fish species exposed to enriched and barren tanks was not compromised throughout the experiment. Moreover, the higher k-value in African catfish exposed to the SE form of enrichment suggests that the provided form of enrichment met the requirements of the fish species in their rearing enclosures (18,54).…”

Section: Discussionmentioning

confidence: 99%

“…One hundred and eighty juveniles of Clarias gariepinus of 9-week-old were purchased from a private fish farm and transported in oxygen-filled polythene bags at 0700 h to the study site. The fish were acclimatized for 14 days in a rectangular fiber tank (6 x 4 x 3 m); they were fed twice daily (0900 h and 1,700 h) with Coppens feed (3 mm, Crude Protein = 45% and crude lipid = 12%, 4,300 kcal of digestible energy kg − 1) at 3% body weight ( 16 , 54 ).…”

Section: Methodsmentioning

confidence: 99%

“…Each tank and treatment was observed for 120 min throughout the study period by two observers (with a timekeeper per observer). The sidewalls of the rearing tanks were covered with black polythene materials to prevent human disturbance during behavioral assessment ( 19 , 54 ). The feeding response of the C. gariepinus in each treatment was assessed with a stopwatch.…”

Section: Methodsmentioning

confidence: 99%

“…These behavioral tools include alteration in feed response, shoaling, aggression acts, swimming behavior etc., within the rearing enclosures of the fish ( 6 ). The rate of feed response in cultured fish species indicates the growth and production success of the farmer in the aquaculture sector ( 18 , 54 ). Martins et al ( 55 ) reported the relevance of shoaling behavior as a defensive behavior against predators and a good indicator of positive welfare in farmed fish species.…”

Section: Introductionmentioning

confidence: 99%

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Environmental enrichment improves the growth rate, behavioral and physiological response of juveniles of Clarias gariepinus under laboratory conditions

et al. 2022

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Environmental enrichment (EE) improves the growth rate and welfare of some cultured fishes. However, most cultured fish species are raised in non-enriched housing conditions. Clarias gariepinus is an important commercial fish species, but little is known about the effect of EE on their welfare. This study examined the effect of different EE on the survival rate (SR), growth [mean weight gain (MWG), specific growth rate (SGR) and feed conversion ratio (FCR)], behavioral (feed response, aggressive acts and shoaling time) and physiological responses (blood glucose) of C. gariepinus. One hundred and twenty juveniles of C. gariepinus (31.65 ± 0.69 g) were randomly allocated at 10 fish/tank and subjected to either Plant Enriched (PE), Substratum Enriched (SE), Plant and Substratum Enriched (PSE) and Non-Enriched (NE) tanks in triplicates for 56-days. Behavioral acts were observed for 10 min twice daily, and glucose level in blood samples was evaluated. Data were checked for normality using the Shapiro-Wilk test before being analyzed with the Kruskal-Wallis test. SR and MWG were significantly higher in Clarias gariepinus exposed to SE, with no significant differences among PE, PSE and NE treatments. There was no significant difference between the SGR of PSE and NE. FCR was similar between treatments. The highest condition factor (k) was recorded in SE tanks. Duration of feed response was shorter in SE, but there was no significant difference between the feed response of C. gariepinus exposed to PE and PSE. C. gariepinus exposed to PE, SE and PSE displayed a similar frequency of aggressive acts. African catfish reared in NE (barren) tanks had the least duration of shoaling period. The experiment consistently found the highest and least glucose values in PSE and SE. In conclusion, environmentally enriched housing tanks with SE resulted in the best MWG with a reduced level of aggression in C. gariepinus under laboratory conditions. Thus, EE might be applicable to boost fish productivity on a commercial scale.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental enrichment improves the growth rate, behavioral and physiological response of juveniles of Clarias gariepinus under laboratory conditions

et al. 2022

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Interactions Between Pre-harvest, Post-harvest Handling and Welfare of Fish for Sustainability in the Aquaculture Sector

Ojelade

George

Abdulraheem

et al. 2023

Sustainability Sciences in Asia and Africa

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Chronic social isolation affects feeding behavior of juvenile zebrafish (Danio rerio)

Dissinger,

Rimoldi,

Terova

et al. 2024

PLoS ONE

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Many organisms exhibit social behaviors and are part of some scheme of social structure. Zebrafish are highly social, shoaling fish and therefore, social isolation may have notable impacts on their physiology and behavior. The objective of this study was to evaluate the effects of social isolation on feed intake, monoaminergic system related gene expression, and intestinal health of juvenile zebrafish fed a high-inclusion soybean meal based diet. At 20 days post-fertilization zebrafish were randomly assigned to chronic isolation (1 fish per 1.5 L tank) or social housing (6 fish per 9 L tank) with 18 tanks per treatment group (n = 18). Dividers were placed between all tanks to prevent visual cues between fish. Zebrafish were fed a commercial fishmeal based diet until 35 days post-fertilization and then fed the experimental high-inclusion soybean meal based diet until 50 days post-fertilization. At the end of the experiment (51 days post-fertilization), the mean total length, weight, and weight gain were not significantly different between treatment groups. Feed intake and feed conversion ratio were significantly higher in chronic isolation fish than in social housing fish. Expression of monoaminergic and appetite-related genes were not significantly different between groups. The chronic isolation group showed higher expression of the inflammatory gene il-1b, however, average intestinal villi width was significantly smaller and average length-to-width ratio was significantly higher in chronic isolation fish, suggesting morphological signs of inflammation were not present at the time of sampling. These results indicate that chronic isolation positively affects feed intake of juvenile zebrafish and suggest that isolation may be useful in promoting feed intake of less-palatable diets such as those based on soybean meal.

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Social isolation impairs feed intake, growth and behavioural patterns of catfish under culture conditions

Cited by 3 publications

References 30 publications

Environmental enrichment improves the growth rate, behavioral and physiological response of juveniles of Clarias gariepinus under laboratory conditions

Environmental enrichment improves the growth rate, behavioral and physiological response of juveniles of Clarias gariepinus under laboratory conditions

Interactions Between Pre-harvest, Post-harvest Handling and Welfare of Fish for Sustainability in the Aquaculture Sector

Chronic social isolation affects feeding behavior of juvenile zebrafish (Danio rerio)

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