FOOD AND FEEDING HABITS OF BAY AD FISH BAGRUS BAJAD (FORSSKAL, 1775) IN El-NOZHA HYDRODROME, ALEXANDRIA, EGYPT

Bakhoum, Shnoudy A.; Faltas, Samir N.

doi:10.21608/ejabf.2003.1774

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…Moreover, information on diet composition, relative gut length (RGL), fullness index (FI) and foraging intensity are helpful for fish farming [3,4,13,19], that are used to evaluate the variation of environmental factors [7]. The intraspecific variation of fish feeding habit is determined based on the change of RGL values [2,21], and the FI is used as a biological indicator to examine the foraging intensity of fish [8].…”

Section: Introductionmentioning

confidence: 99%

Preliminary study on dietary composition, feeding activity and fullness index of Boleophthalmus boddarti in Mekong delta, Vietnam

Dinh¹

2015

V J Bio

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The mudskipper Boleophthalmus boddarti (Pallas, 1770) is an important commercial fish, but information on its dietary composition has been limited. This study was carried out from March 2013 to February 2014, in Tran De, Soc Trang, Mekong Delta, Vietnam to understand its food, foraging intensity and fullness index. A total of 120 fish specimens including 63 females (8-15 cm in TL) and 57 males (9.5-15.1 cm in TL) were collected and analysed. The results showed that the sex ratio of B. boddarti was close to 1:1 and this mudskipper would be a herbivorous fish due to high relative gut length value (RGL>1) based on 120 gastrointestinal tract length analysis. Among them, 75 fish stomachs were used for food item determination. The B. boddarti fed mainly on Bacillariophyta (82.97%), and detritus was also composed in its stomach contents (13.26%). The mudskipper showed high in foraging intensity due to high fullness index value. The variation of food composition of this fish depended on season, but not in gender and fish size. The results provided useful information on diet composition of B. boddarti and contributed to our knowledge for other gobies living in the monsoonal regions.

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Section: Introductionmentioning

confidence: 99%

Preliminary study on dietary composition, feeding activity and fullness index of Boleophthalmus boddarti in Mekong delta, Vietnam

Dinh¹

2015

V J Bio

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“…The irrigation was a Federal Government of Nigeriaprogram (Hadejia Valley Irrigation Project) coordinated by the Hadejia-Jama'are River Basin Development Authority (H.J.R.B.D.A). The dam covers an estimated area of 3800sqkm 2 Matthes [12]. This has brought an increased fishing activity especially in those villages surrounding the dam site.…”

Section: Study Areamentioning

confidence: 99%

Gonad Somatic Index and Feeding Habit of Selected Fish Species of Lake Kalgwaiin Jigawa State, Nigeria

O¹

2017

OFOAJ

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This study investigates gonado somatic index, food and feeding habit of selected fish species of Lake Kalgwai Jigawa State, Nigeria. Samples of fish were collected every fortnight (July 2012-June 2013) at three major landing sites of the lake. The weight of each fish was recorded, gonads were removed, weighed and the gonadosomatic index (GSI) calculated. Stomach was also removed and the content analyzed using frequency of occurrence and point method. Result obtained reveals GSI to range from 2.39±0.08% in Nile perch Latesniloticus [1] to 5.92±0.29% in Nile tilapia Oreochromisniloticus [1]. The stomach content analysis in this study distinguished the fish species into two major groups; Latesniloticus, Mormyrusmacrophthalmus Günther, 1866 and Bayad bagrus bayad Forsskål [2] were observed to exhibit carnivorous feeding habits and feed predominantly on crustacean, fish, fish parts, mollusks, insects and insect larvae, Oreochromisniloticus, African bony tongue Heterotisniloticus [3], Electric catfish Malapteruruselectricus, Synodotisnigrita and North African catfish Clarias gariepinus on the other hand were observed to have an omnivorous feeding pattern with plant parts, insect parts, detritus, crustaceans, snails, worms, fish parts, insects larvae, sand/mud, and algae dominating their diet. Many of the omnivores encountered in this study have good potential as future aquaculture candidate hence the need to further study their biology and their performance under captivity.

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“…In C.gariepinus, it also takes origin from the fourth infraorbital bone. Dilator operculi (Figure 2.3) and the levator opercula Concerning feeding habits of the Nile catfishes M. electricus and B. bajad are piscivores (SAGUA, 1979;BAKHOUM and FATAS, 2003). C. gariepinus was omnivores, while S. schall feeding mainly on mollusks (BURGESS, 1989).…”

Section: Feeding Mechanisms Of the Nile Catfishmentioning

confidence: 99%

Comparative osteology and three dimensional computed tomography of Nile catfishes, in relation to feeding mechanisms

Eshra

Asely

2014

J Morphol Sci

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Introduction:For the first time three-dimensional Computed Tomography was used in a study concerning Nile catfishes heads. Methods: The present study is carried out on 40 heads of four examplar species of catfish families, Bagridae (B. bajad); Clariidae (C. garpineus); Malapteruridae (M. electricus) and Mochokidae (S. schall). Specimens are double-stained for cartilage and bone, as done by Taylor and Van Dyke (1985). Results: the skull of M. electricus was consisted of both bones and cartilage, as the frontal, parietal, supraoccipital, postparietal, sphenotic and pterootic were remained cartilages in mature fish. In order to ease the studying process the bones of catfish skulls were arranged in clear twelve series. This arrangement may facilitate the diagnosis of the malformations and other related diseases. Despite the similarity of the feeding apparatus in the Nile-catfish, they have different feeding mechanisms. B. bajad able to feed on large sized preys because of the free branchiostegeal membrane, the large dimensions of the oral and pharyngeal gap limits. M. electricus has another method as we suggest that the liable cartilages which form the skull roof are easily squeezed by voluminous muscles, raise the roof of the mouth and expand the oropharynx. In S. schall the narrow oropharyngeal limits and the subterminal mouth are suitable for sucking small mollusks, a process aided by the hard pad of the upper lip and the brush like mandibular teeth. Conclusions: This work provides an anatomical description of the fish heads using 3D CT which may facilitate the diagnosis of malformations and other related diseases. It also discussed the different feeding habits of the Nile Catfish.

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FOOD AND FEEDING HABITS OF BAY AD FISH BAGRUS BAJAD (FORSSKAL, 1775) IN El-NOZHA HYDRODROME, ALEXANDRIA, EGYPT

Cited by 6 publications

References 10 publications

Preliminary study on dietary composition, feeding activity and fullness index of Boleophthalmus boddarti in Mekong delta, Vietnam

Preliminary study on dietary composition, feeding activity and fullness index of Boleophthalmus boddarti in Mekong delta, Vietnam

Gonad Somatic Index and Feeding Habit of Selected Fish Species of Lake Kalgwaiin Jigawa State, Nigeria

Comparative osteology and three dimensional computed tomography of Nile catfishes, in relation to feeding mechanisms

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