Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822)

Haque, Md. Ayenuddin; Paul, Shitangsu Kumar; Jewel, Md. Abu Sayed; Atique, Usman; Paul, Anu; Iqbal, Sonia; Mahboob, Shahid; Al‐Ghanim, Khalid A.; Al‐Misned, Fahad A.; Ahmed, Zubair

doi:10.1590/1519-6984.237040

Cited by 4 publications

(3 citation statements)

References 41 publications

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“…The summation of all the metrics scores obtained guided to materializing the outcome as the final IBI score that later represented the biological integrity classes. The biotic integrity classes and their ranges based on IBI scores are: excellent (36)(37)(38)(39)(40), good (28)(29)(30)(31)(32)(33)(34), fair (20)(21)(22)(23)(24)(25)(26), poor (14)(15)(16)(17)(18) and very poor (8-13).…”

Section: Ecological Health Assessmentmentioning

confidence: 99%

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Key Drivers Influencing the Presence and Absence of Micropterus salmoides and Their Effect on Native Fish Communities and Biotic Integrity

Kim

Atique

2021

Water

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Invasive alien fish species (IAFS) influence recipient ecosystems in multiple ways, from altered native fish communities to poor ecological health and higher economic losses to control and eradication. We tested key drivers and connections between an IAFS (Micropterus salmoides) presence, absence, geomorphological, hydro-chemical, physical habitat, native fish assemblages, and large river basins biotic integrity during 2016–2019. A total number of 62,121 individuals (TNI) representing 74 fish species were observed, out of which 68 species (45,677 TNI) belonged to the Geum River (GR) basin, while 63 species (16,444 TNI) were from the Mankyong/Dongjin River (MDR) basin. The results illustrated a significant contrast based on stream order, catchment area, altitude, stream gradient, and width among the sites with and without largemouth bass. However, fluctuations in nutrients (nitrogen and phosphorus) were not affected by variations in pH, dissolved oxygen, conductivity, suspended solids, and river flow. The largemouth bass has emerged as the 8th largest fish population in the GR and swiftly occupies the MDR basin with a constancy value of 45.5. Native sensitive (r = −0.38), insectivore (r = −0.252), carnivores (r = −0.085), and TNI (r = −0.512) displayed a negative correlation with increasing largemouth bass abundance. Largemouth bass induced significant regime transformation in the carnivore species. A significant difference (p < 0.01) of biotic integrity was illustrated among the largemouth bass population sites. A conspicuous interplay between ‘poor’ ecological health (r = 0.33, p = 0.038, n = 41) sites and ‘fair–excellent’ (r = −0.38, p < 0.001, n = 622) sites as compared to the overall ecological health linked with largemouth bass abundance (r = −0.397, p < 0.001, n = 663) alluded to stronger impact of the IAFS. In conclusion, the largemouth bass has potentially altered the native fish assemblage and ecological health. Further, we conclude that rapidly shifting flow patterns supported by the expanding anthropogenic interventions (weirs and dam) are the most approving factors of impending fish invasions.

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Section: Ecological Health Assessmentmentioning

confidence: 99%

“…Apart from a globally shared concern, the other reasons for increasing investigations into alien species include the multiple impacts on species to ecosystem ecology, economic losses, and biodiversity conservation [13]. Anthropogenic disruptions are critical to limiting the native fish species and favoring the invasive species [12,14,15].…”

Section: Introductionmentioning

confidence: 99%

Key Drivers Influencing the Presence and Absence of Micropterus salmoides and Their Effect on Native Fish Communities and Biotic Integrity

Kim

Atique

2021

Water

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“…Several studies have been carried out on the diet compositions of different fish species [14][15][16][17]. Also, previous studies have been conducted to explore the different parasites infecting various fish species [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Morphometric Indices and Parasitic Incidence of Synodontis nigrita from Lower River Benue, Makurdi, Nigeria

Omeji,

Jackson,

Surma

2023

AJFAR

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The study was carried out to determine the morphometric indices and parasitic incidence of 160 fresh samples of Synodontis nigrita comprising of 80 samples each of female and male sexes. Fish samples were obtained from the catches of local fishermen along Lower River Benue at Wadata fish landing site of Benue State. Length–weight relationship was analyzed using the equation W=aLb. The condition factor of the fish samples was determined using the equation, K=100W/L3. Samples of Synodontis nigrita were later subjected to parasitological examination using standard parasitological method. The mean total length, body weight, condition factor, regression and correlation coefficients were higher for un-infested female samples of Synodontis nigrita than the infested female. Similarly, the mean total length body weight, condition factor, regression and correlation coefficients of un-infested male samples of Synodontis nigrita were higher than the infested males. A total of three hundred and fifty seven (357) parasites were recovered from 76(47.50%) infested samples. Out of the 357 parasites, 251 were recovered from 49(61.3%) infested female samples, 106 parasites were recovered from 27(33.8%) infested male samples. Among the infested parts of the female samples, the intestine accounted for the highest number/percentage (116/46.4%) parasite load, the least 2(0.8%) was recorded for the skin. Between the external parts (gill and skin) of the female fish samples, while the gill recorded the higher number of parasite load 28(12.8%), skin recorded 2(0.8%). Similarly, among the infested parts of the male samples, the intestine accounted for the highest number/percentage (65/61.3%) parasite load, the least 9(8.5%) was recorded for the gill. Between the external parts (gill and skin), the gill recorded 9(8.5%) number/percentage parasite load, no parasite was recovered from the skin. Prevalence (61.25), number of parasites (251) and intensity (5.10) of parasite infection were higher for female samples compared to the male with the prevalence, and intensity of parasite infection of 33.80, 106 and 3.90, respectively. However, the chi square value showed that there was no significant difference (p>0.05) in the prevalence, number of parasites and intensity of parasite infection between the sexes of Synodontis nigrita. Variation in the prevalence and intensity of parasite infection of female and male Synodontis nigrita based on size groups existed. However, it was generally observed that longer and heavier sized fish of both sexes were more infested with higher number of parasites than the smaller sized samples of both sexes.

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Consumption of periphyton and bioseston by Mozambique tilapia in aqua dams with three different substrates

Hlongwane,

Moyo,

Rapatsa-Malatji

2024

Aquacult. Environ. Interact.

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Periphyton-based aquaculture can reduce feed input costs. Here we characterised the periphyton and bioseston formation in aqua dams stocked with net, plastic, and stone substrates. The consumption of periphyton and bioseston from the net substrate by Mozambique tilapia Oreochromis mossambicus fingerlings was evaluated. Three experiments were conducted. In the first experiment, net, stone, and plastic were deployed in triplicates in aqua dams. The net substrate registered the highest (7.74 ± 1.45 g m-2, ±SE) periphyton biomass. Network analysis showed connectedness between the substrates. The degree centrality showed that the net substrate had the highest score, indicating that there were more groups of species with similar functions growing on the net substrate. The net substrate was subsequently used in the second experiment to determine the consumption of periphyton and bioseston by tilapia fingerlings in aqua dams. Three treatments were assigned: N100 (fish fed 100% commercial diet); N50 (fish fed 50% commercial diet); and N33 (fish fed 33% commercial diet). Growth performance did not differ significantly among the treatments, although N50 showed a trend for a higher growth. This suggests that periphyton may be capable of nutritionally compensating for the partial withdrawal of commercial feed. A third experiment was conducted in fibreglass tanks to determine the preference of tilapia between periphyton and bioseston. The prominent values showed that tilapia preferred to feed on bioseston. The best growth performance was achieved in a periphyton-based aquaculture system, and deployment of the net substrate is recommended in tilapia ponds.

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Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822)

Cited by 4 publications

References 41 publications

Key Drivers Influencing the Presence and Absence of Micropterus salmoides and Their Effect on Native Fish Communities and Biotic Integrity

Key Drivers Influencing the Presence and Absence of Micropterus salmoides and Their Effect on Native Fish Communities and Biotic Integrity

Morphometric Indices and Parasitic Incidence of Synodontis nigrita from Lower River Benue, Makurdi, Nigeria

Consumption of periphyton and bioseston by Mozambique tilapia in aqua dams with three different substrates

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