An overview of domestication potential of Barbus altianalis (Boulenger, 1900) in Uganda

Aruho, Cassius; Walakira, John; Rutaisire, J.

doi:10.1016/j.aqrep.2018.05.001

Cited by 8 publications

(9 citation statements)

References 42 publications

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“…This may be attributed to the geographical location of the rivers and variation in environmental conditions (Rutaisire et al, 2015). Further, males matured earlier than females, a similar finding that was also reported by Aruho et al, (2018). The early maturation of male fish may be regarded as a reproduction strategy which ensures that eggs released by female fish during spawning period are fertilized.…”

Section: Discussionsupporting

confidence: 57%

“…However, in the present study sex ratio did not deviate from the expected 1:1. Skewed sex ratios could suggest migration activity associated with breeding periods, a shorter life span for one sex, distribution range, and environmental variations (Aruho et al, 2018;Trindade-Santos & Freire, 2015). It was also established by Manal et al, (2016) that in some fish species unbalanced sex ratio may be due to vulnerability to fishing.…”

Section: Discussionmentioning

confidence: 93%

“…This could ensure sustainability, since the number of fish that join adult population will increase and are able to breed for future harvests (Gaspare & Bryceson, 2013). Labeobarbus altianalis from Kuja-Migori reached sexual maturity earlier than those from river Kagera and river Sio in Uganda (Aruho et al, 2018). This may be attributed to the geographical location of the rivers and variation in environmental conditions (Rutaisire et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

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Reproductive Biology of Ripon Barbel (Labeobarbus Altianalis) In River Kuja-Migori Basin, Kenya

Kembenya

Getabu

Njiru

et al. 2022

Res. Agric. Livest. Fish.

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The present study aimed to investigate the reproductive biology of Labeobarbus altianalis from River Kuja-Migori basin, Kenya. This fish species is distributed in most water bodies in the Lake Victoria basin and effluent rivers. Labeobarbus altianalis is susceptible to fishing due to aggregation at the river mouths during reproduction seasons. We conducted a study for 18 months with an objective of determining length at 50% sexual maturity, fecundity, gonadosomatic index, egg size, sex ratio and breeding season of L. altianalis. The results showed that breeding of this fish occurred from March to August and September to November coinciding with longer and shorter rain seasons. Fecundity ranged from 1320-2382 eggs (mean 1552 ± 23.3). There was a strong correlation between fecundity and total length (R2 = 0.994). The mean egg diameter was 1.2 ± 0.007 mm. Mean gonado-somatic index was 5.63 ± 0.34 and 2.24 ± 0.21 for females and males respectively. The length at 50% sexual maturity was estimated to be 16.3 cm and 18 cm total length for males and females respectively. There was no significant difference in sex ratio from the hypothetical 1:1 (χ2, p > 0.05). Females had low fecundity and males attain sexual maturity earlier than females. Results from this study provide important information for managing riverine fishery in the Lake Victoria basin. Vol. 9, No. 2, August 2022: 221-228

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Section: Discussionsupporting

confidence: 57%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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Reproductive Biology of Ripon Barbel (Labeobarbus Altianalis) In River Kuja-Migori Basin, Kenya

Kembenya

Getabu

Njiru

et al. 2022

Res. Agric. Livest. Fish.

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“…The evaluation of reproductive performance in other fish species has had beneficial impacts in the development of freshwater aquaculture in Asia. [20][21][22][23][24] In contrast, there are still gaps in knowledge of giant gourami sago strain broodfish regarding size at oocyte maturity, age of sexual maturity, sperm characteristics, egg hatchability, survival after eyed-egg stage, larva weaning, and growth rate. These factors were identified as key challenges for successful giant gourami sago strain hatchery performance in the future.…”

Section: Introductionmentioning

confidence: 99%

Reproductive characteristics of the giant gurami sago strain (Osphronemus goramy Lacepède, 1801): basic knowledge for a future hatchery development strategy

2021

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Background: The giant gourami sago strain (Osphronemus goramy Lacepède) has been approved in 2018 as a candidate for freshwater aquaculture in Indonesia. However, information on the species’ reproduction is minimal. This study analyzed the reproductive characteristics of the gourami sago strain broodfish to provide basic knowledge for a future hatchery development strategy. Methods: A total of 10 female and 10 male mature gourami sago strain broodfish were measured for body weight and length, and were evaluated for their reproductive characteristics. Breeding fish were spawned naturally in a 2×1×0.6 m concrete pond with a male-female sex ratio of 1:1. Egg weight and diameter were measured in 25 eggs per female using, respectively, ACIS AD- 600i scales with 0.01 g accuracy, and a microscope (Labo model L-711) using Canon Digital Camera Software 3 . Semen was collected using plastic syringes in 3 mL aliquots, then placed in an insulated ice-cooled container, and analyzed within two hours of collection. Results: Average weights of female and male broodfish before spawning were 2180±159.78 g and 3060±134.99 g, respectively. The relative fecundity and egg diameter were 1029±36 eggs kg-1 and 2.42±0.05 mm, respectively. The hatching rate and embryo survival to an eyed-egg stage were respectively 76.40±2.27% and 94.76±0.42%. Sperm characteristics showed that volume was 0.60±0.12 ml kg-1 and percentage of motile sperm was 70.04±2.27%. Female broodfish weight after spawning was strongly correlated with the weight before spawned (r2 = 0.999) and absolute fecundity was also strongly correlated with female broodfish weight before spawning (r2= 0.921). Sperm concentration was moderately correlated with sperm motility (r2 = 0.556) and duration of sperm motility (r2 = 0.502). Conclusions: The gourami sago strain broodfish has suitable reproductive characteristics for the development of hatcheries. Successful natural spawning should be followed by larval weaning and feeding technology to increase growth and survival.

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“…This political will has triggered the development of new species production (e.g. DIVERSIFY project [https://www.diversifyfish.eu/], Aruho et al 2018; Mitra et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Unlocking the intraspecific aquaculture potential from the wild biodiversity to facilitate aquaculture development

Toomey

Fontaine

Lecocq

2020

Reviews in Aquaculture

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Domestication of new candidate species remains a long and difficult process often resulting in unfruitful attempts. Early steps in most domestication programmes often consider species as a unity, disregarding a part of the biodiversity: the wild intraspecific geographic differentiation. Yet, this differentiation can shape local specificities, which could lead to different domestication predisposition or socio‐economic attractiveness between populations. Therefore, considering this population‐specific potential could facilitate domestication and subsequent production of new candidate species. Here, we propose a three‐step integrative approach to standardise and facilitate new domestication attempts by taking advantage of wild geographic differentiation. Step 1 consists of classifying the wild biodiversity to identify prospective units (i.e. groups of differentiated allopatric populations). Step 2 allows comparing performances of these units in standardised conditions (i.e. rearing system) through a multifunction and multi‐trait assessment. Finally, step 3 highlights units with higher aquaculture potentials through the calculation of an aquaculture potential score. This approach, here applied to fish culture for human consumption, also aims at being extended to other taxa (e.g. crustaceans, molluscs) and other production goals.

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An overview of domestication potential of Barbus altianalis (Boulenger, 1900) in Uganda

Cited by 8 publications

References 42 publications

Reproductive Biology of Ripon Barbel (Labeobarbus Altianalis) In River Kuja-Migori Basin, Kenya

Reproductive Biology of Ripon Barbel (Labeobarbus Altianalis) In River Kuja-Migori Basin, Kenya

Reproductive characteristics of the giant gurami sago strain (Osphronemus goramy Lacepède, 1801): basic knowledge for a future hatchery development strategy

Unlocking the intraspecific aquaculture potential from the wild biodiversity to facilitate aquaculture development

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