Food and Feeding Habits of &lt;i&gt;Distichodus&lt;/i&gt; Species (Osteichthyes: Distichodontidae) in Anambra River Basin, Nigeria

Inyang, Nicholas Mathias; Nwani, CD

doi:10.4314/br.v2i2.28551

Cited by 4 publications

(7 citation statements)

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“…The number of guts in which each food item occurred was listed and expressed as a percentage of the total number of guts examined. The proportion of the fish population that fed on a particular food item was estimated according to Odun and Anuta (2001) and Inyang and Nwani (2004). Note: mm = millimeters, g = gram, x TL = mean total length, x BW = mean body weight.…”

Section: Frequency Of Occurrence Methodsmentioning

confidence: 99%

“…The total number of each food item from each gut was summed up for all guts and expressed as a percentage of the total number of all food items as expressed by Odun and Anuta (2001) and Inyang and Nwani (2004).…”

Section: Methodsmentioning

confidence: 99%

“…One hundred points were shared among the food items present in each gut according to their sizes, and expressed in percentage according to Inyang and Nwani (2004).…”

Section: Point Methodsmentioning

confidence: 99%

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Food items and general condition of Hyperopisus bebe occidentalis (Lacepede, 1803) caught in Warri River, Nigeria

Olele¹

2013

Afr. J. Environ. Sci. Technol.

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A total number of 202 specimens, comprising 75 females and 127 male specimens of Hyperopisus bebe occidentalis were caught from Warri River. This gave a 1:1.7 female to male sex ratio. The total length range for male specimens was 189.2 to 355.0 mm and 246.0 to 376.1 mm for females. The body weight range for male specimens was 51.0 to 448.0 g, while that recorded for female specimens was 106.0 to 400.0 g. The correlation coefficient for length-weight relationship revealed significant differences (P<0.05) for male ('r' = 0.77) and female ('r' = 0.51) specimens, respectively. The slope of the regression coefficient 'b' was (2.68) for males and 1.76 for females. Both values were less than 3 implying that the fish increased more in total length than in body weight. The condition index was more favorable for male (4.64) than for female (4.14) specimens based on mean value calculated on fresh and gutted body weights.

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Section: Frequency Of Occurrence Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Food items and general condition of Hyperopisus bebe occidentalis (Lacepede, 1803) caught in Warri River, Nigeria

Olele¹

2013

Afr. J. Environ. Sci. Technol.

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“…The result of this study also shows that D. rostratus is purely herbivorous, feeding mainly on aquatic plants, algae and some dead wood and this is in accordance with the findings of Bakare (1968) from River Niger; Medani (1968) from Jebel-Aulia Reservoir in Sudan; Motwani and Kanwai (1970) and Arawomo (1982) both studies from Kainji Lake. On the contrary, Inyang and Nwani (2004) and Offem et al (2009) reported omnivorous feeding in the species from Anambra River Basin and Cross River respectively. The structural feeding adaptation such as the numerous and fine gill rakers can be used to sieve small food materials such as phytoplankton and algae present in water.…”

Section: Food and Feeding Adaptationsmentioning

confidence: 96%

“…Many studies were carried out on various aspects of the biology of D. rostratus in water bodies from Nigeria (Arawomo (1982); Inyang and Nwani (2004); Nwani and Ude (2005) ;Nwani, (2006); Abowei and Hart (2009) and Abowei, 2010). So far, no work has been reported on the biology of this important fish species in River Rima.…”

Section: Introductionmentioning

confidence: 99%

Some Aspects of the Biology ofDistichodus rostratus (GUNTHER, 1864) in River Rima, North-western Nigeria

Shinkafi¹,

Salim²,

Yusuf³

2013

GJBS

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2013

GJBS

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Study was carried out to determine some aspects of the biology of Distichodus rostratus (GUNTHER, 1864) in River Rima, North-western Nigeria. This is with a view to provide information on the species in River Rima which has not been documented elsewhere. These include morphometric measurements, growth pattern, diet composition, gonad maturation stages, gonadosomatic index (GSI) and fecundity of the species. A total of 66 samples were collected from Kwalkwalawa fish landing site of River Rima between July and December, 2012. Total length of the samples ranged from 18.70±0.99SE to 46.20±0.99SE with a mean value of 31.18±0.99SE while total weight ranged from 104.20±32.65SE to 892.60±32.65SE with a mean value of 473.92±32.65SE. The b values of 2.461, 2.476 and 2.292 for all samples, females and males respectively indicate negative allometry. Mean condition factor was 1.52±0.517SD, indicating that the species are in good condition. Analysis of the stomach contents revealed that the species are herbivorous feeding mainly on leaves and roots of aquatic plants, grasses, algae and deadwood. Observation of the structural feeding adaptations such as the sub-inferior mouth, the fine and numerous gill rakers, the U-shaped stomach and the long intestine further confirms the herbivorous nature of the fish. Four stages of gonad maturation were established in females and three stages in males. Gonadosomatic index values for males ranged from 0.08 to 1.20% with mean value of 0.25±0.0211SE and for females 0.25 to 2.29%, with a mean value of 1.89±0.829SE. Fecundity ranged from 2,980 -21,010 eggs.

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Food and Feeding Habits of <i>Distichodus</i> Species (Osteichthyes: Distichodontidae) in Anambra River Basin, Nigeria

Cited by 4 publications

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Food items and general condition of Hyperopisus bebe occidentalis (Lacepede, 1803) caught in Warri River, Nigeria

Food items and general condition of Hyperopisus bebe occidentalis (Lacepede, 1803) caught in Warri River, Nigeria

Some Aspects of the Biology ofDistichodus rostratus (GUNTHER, 1864) in River Rima, North-western Nigeria

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