Morphology and functional ontogeny of the digestive tract of<i>Barbus altianali</i>s larvae

Aruho, Cassius; Walakira, John; Bugenyi, F. W. B.; Rutaisire, J.; Reading, Benjamin J.

doi:10.1080/15627020.2019.1642140

Cited by 5 publications

(2 citation statements)

References 29 publications

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“…Among the main functional organs, the first to be formed in P. brachypomus are the eyes, nostrils, swim bladder and mouth, which appear along the yolk‐sac and pre‐flexion stages. This is associated with the need for the formation of sensory and locomotor structures, which occur simultaneously in the search for adequate exogenous foods (Aruho et al ., 2019; Oliveira et al ., 2020; Silva et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

Early ontogeny of the commercially valuable fish red‐bellied pacu Piaractus brachypomus (Characiformes, Serrasalmidae) from the Amazon, Brazil

Santos

Oliveira

Cajado

et al. 2022

Journal of Fish Biology

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The initial development of the red-bellied pacu Piaractus brachypomus is described using morphological, meristic and morphometric characteristics. A total of 127 individuals were analysed (47 in the yolk-sac, 35 in pre-flexion, five in flexion, 20 in post-flexion and 20 in juvenile) with standard length varying between 2.92 and 48.61 mm. The larvae are born poorly developed and have a discoidal yolk at $6.33 mm standard length. During early ontogeny, the mouth passes from terminal to subterminal and the anal opening reaches the vertical line over the midline region of the body. There are changes in body shape from long and moderate to deep, head length from small to large, and eye diameter from moderate to large. Dendritic chromatophores were present in the ventral, dorsal and upper part of the swim bladder in the early larval stages. Rounded spots are evident all over the body in juveniles. The total number of myomeres ranges from 39 to 41 (20-23 pre-anal, 17-20 post-anal). Through the morphometric relationships, it was evidenced that the greatest changes during the initial ontogeny of P. brachypomus occur in the transition from the post-flexion stage to the juvenile period, indicating changes in behaviour, foraging and physiology.

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Section: Discussionmentioning

confidence: 99%

Early ontogeny of the commercially valuable fish red‐bellied pacu Piaractus brachypomus (Characiformes, Serrasalmidae) from the Amazon, Brazil

Santos

Oliveira

Cajado

et al. 2022

Journal of Fish Biology

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“…To determine the optimal water temperature for the growth of B. altianalis larvae, about 60 hatched larvae (3 ± 1 mg SD) were randomly distributed into each of 50 L glass tanks at temperatures of 24, 27, 30, 31 C with four replicates each. The larvae were fed on a combination diet of Moina and dry feed (57% crude protein) until 54 DAH when they had developed scales covering at least half of the body and presumed to be a Juveniles (Aruho et al, 2019). Feeding was carried out to satiation at 8:30 a.m., 12:00 p.m. and 5:00 p.m. Aeration was provided by an aeration pump and dissolved oxygen was maintained at 7.0 ± 1.2 mg/L and pH of between 7 and 8.…”

Section: Experiments V: Effect Of Temperature On Larval Survival and ...mentioning

confidence: 99%

Optimal factors for egg hatchability and larvae development of Barbus altianalis under captivity

Aruho

Kimera

Ddungu

et al. 2022

J World Aquaculture Soc

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Five experiments were conducted to identify optimal temperature, light, water depth, and hatching facility suitable for the hatchability of Barbus altianalis embryos and larval growth. In experiment I, eggs were incubated at 24, 27, and 30°C with and without aeration. In experiment II, eggs were incubated in conical jars, re‐circulating and glass tanks at 27°C. In experiment III, eggs were incubated at lux values of 54.2 ± 5.5 and 10,701.8 ± 2224.3 SD. In experiment IV, eggs on trays were placed at the bottom of glass tank (60 cm depth) and others at the surface. In experiment V, six old day larvae were treated at 24, 27, 30, and 31°C. Results indicated that optimal embryo hatchability ranged from 92.9 ± 2.0% to 94.1 ± 2.9% (no aeration) at 24°C and 89.3 ± 1.0% to 91.8 ± 0.8% SE at 27°C (aeration) in two trials. Re‐circulating (84.3%) and glass tanks (80.3%) were more suitable for hatching than conical jars (37.2%). Optimal larvae growth and survival were attained at 30°C (207.4 ± 16.3 mg SE; 78.9 ± 2.0% SD). No differences were observed in egg hatchability with light and water depth treatments (p > 0.05). These results will guide farmers to produce sufficient and quality B. altianalis seeds for farming.

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Allometric and ontogenetic larval development of common barbel during rearing under optimal conditions

Nowosad

Kupren

Biegaj

et al. 2021

animal

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Morphology and functional ontogeny of the digestive tract ofBarbus altianalis larvae

Cited by 5 publications

References 29 publications

Early ontogeny of the commercially valuable fish red‐bellied pacu Piaractus brachypomus (Characiformes, Serrasalmidae) from the Amazon, Brazil

Early ontogeny of the commercially valuable fish red‐bellied pacu Piaractus brachypomus (Characiformes, Serrasalmidae) from the Amazon, Brazil

Optimal factors for egg hatchability and larvae development of Barbus altianalis under captivity

Allometric and ontogenetic larval development of common barbel during rearing under optimal conditions

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