A dual attention network based on efficientNet-B2 for short-term fish school feeding behavior analysis in aquaculture

The territorial, gill-flaring, and feeding behavior of juvenile coho salmon (Oncorhynchus kisutch) in a laboratory stream was disrupted by short-term exposure to suspended sediment pulses. At the higher turbidities tested (30 and 60 nephelometric turbidity units (NTU)), dominance hierarchies broke down, territories were not defended, and gill flaring occurred more frequently. Only after return to lower turbidities (0–20 NTU) was social organization reestablished. The reaction distance of the fish to adult brine shrimp decreased significantly in turbid water (30 and 60 NTU) as did capture success per strike and the percentage of prey ingested. Implications of these behavioral modifications suggest that the fitness of salmonid populations exposed to short-term pulses of suspended sediment may be impaired.

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Does ingested fat produce satiety?

AJP Regulatory Integrative and Comparative Physiology ◽

10.1152/ajpregu.1996.270.4.r761 ◽

1996 ◽

Vol 270 (4) ◽

pp. R761-R765 ◽

Cited By ~ 2

Author(s):

C. C. Horn ◽

M. G. Tordoff ◽

M. I. Friedman

Keyword(s):

Gastrointestinal Tract ◽

Food Intake ◽

Feeding Behavior ◽

Corn Oil ◽

Substantial Reduction ◽

Liquid Diet ◽

Short Term ◽

Diet Intake ◽

Marked Suppression ◽

Fat Meal

Administration of fat directly into the gastrointestinal tract of rats produces a rapid and often substantial reduction of feeding behavior. This contrasts with the normal consumption of a fat meal, which produces little change in subsequent food intake. To determine whether procedural differences account for this discrepancy, we examined the satiating effect of ingested fat on food intake of rats maintained under feeding conditions similar to those employed in studies involving gastrointestinal delivery of fat (i.e., food deprivation, liquid diet). Ingestion of approximately 1.5 ml corn oil had no effect on subsequent liquid diet intake until 90 min after oil ingestion. When rats ingested oil 4 h before access to the liquid diet, to allow time for additional gastrointestinal clearance, liquid diet intake was reduced by 13% in the first 30 min of access. These findings indicate that ingested fat decreases short-term intake slightly, but only if time is allowed for postabsorptive delivery. The results question the physiological significance of the marked suppression of food intake observed in response to administration of fat directly into the gastrointestinal tract.

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The short-term feeding behavior of growing pigs fed foods differing in bulk content

Physiology & Behavior ◽

10.1016/s0031-9384(02)00686-8 ◽

2002 ◽

Vol 76 (1) ◽

pp. 131-141 ◽

Cited By ~ 16

Author(s):

Emma C. Whittemore ◽

Ilias Kyriazakis ◽

Bert J. Tolkamp ◽

Gerry C. Emmans

Keyword(s):

Feeding Behavior ◽

Growing Pigs ◽

Short Term ◽

Bulk Content

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Olfaction and Vision in Fish Schooling

Journal of Experimental Biology ◽

10.1242/jeb.45.3.449 ◽

1966 ◽

Vol 45 (3) ◽

pp. 449-464

Author(s):

C. C. HEMMINGS

Keyword(s):

Visual Images ◽

School Structure ◽

Visual Response ◽

Short Term ◽

Linear Gradient ◽

Fish School ◽

Schooling Behaviour ◽

Clear Plastic ◽

Repulsive Forces

1. The behaviour of individual roach was observed in a horizontal linear gradient of species odour. No attempt was made to analyse the odour involved. 2. The behaviour of roach, grey mullet and Chromis was studied in the presence of (a) a mirror, or (b) a second fish behind a clear plastic sheet. 3. Roach showed nearly as strong a response to attractant species odour as to the repellent ‘Schreckstoff’. The relative strengths of responses to directional visual images and non-directional odour gradients were compared. 4. Short-term and long-term declines in the strength of the response to odour occurred. 5. Observation of a ‘two-fish school’ suggested that a system of exploratory, returning and following tendencies co-ordinated schooling behaviour. 6. Isolation of roach for a period of 20-25 weeks caused enhancement of the olfactory reaction but completely disrupted the visual response. 7. It is suggested that school structure is maintained by balanced attractive and repulsive ‘forces’; the attraction modalities involved are vision by day and olfaction by night, and the repulsion modality is the lateral line sense.

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