Length-weight relationship and stomach content of Portunid crab &lt;i&gt;Callineces pallidus&lt;/i&gt; (de Rouchebrune 1883) from the Gulf of Guinea

Bello-Olusoji, OA; Oyekanmi, M; Afunmiso, OM; Ozorewor, MO

doi:10.4314/bja.v3i1.41907

Cited by 2 publications

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“…The length-weight relationship study carried out by Atar & Seçer (2003) indicated that blue crabs, Callinectes sapidus, mostly reach legal size of between 11 and 15 cm in carapace length. Bello-Olusoji et al (2006)'s work on LWR of portunid crabs, Callinectes pallidus, reported that size ranged between 15.50 and 22.57 cm. Thus, an indication that blue crabs and portunid crabs reach maturity at greater sizes than S. africanus, which mature at early sizes.…”

Section: Discussionmentioning

confidence: 99%

“…According to Bello-Olusoji et al (2006), the weight of adult portunid crabs, C. pallidus, ranged from 236 to 324 g, which was greater than that of S. africanus. This indicates that dimensions change with Bagenal (1978), who explained that when co-efficient of regression is greater and or less than 3, then growth is allometric but when equal to 3, then the growth is isometric.…”

Section: Discussionmentioning

confidence: 99%

“…Crab culture is yet to be developed in Nigeria, with the vast number of crabs present in both marine and freshwater bodies (Bello-Olusoji et al, 2006). Crabs are commonly harvested with crab pots, gill/set nets, and traps by local fishermen from streams, ponds, reservoirs and rivers.…”

Section: Introductionmentioning

confidence: 99%

“…In Nigeria, the only major crab fishery operation is the fishing and exportation of the marine portunid crabs (Bello-Olusoji et al, 2006). FAO (2002) estimated the exportation to worth at least $10 million.…”

Section: Introductionmentioning

confidence: 99%

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Length-Weight Relationships, Condition Factor and Fecundity of the West Africa Freshwater Crab, <i>Sudanonautes africanus</i> (Milne-Edwards 1883), in Western Nigeria

Olusoji¹,

Anifowose²,

Sodamola³

2010

West African Journal of Applied Ecology

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The length-weight relationships, condition factor and fecundity of the West-African freshwater crab, Sudanonautes africanus, was studied from different freshwater bodies within southwestern Nigeria. The crabs were separated into males (151) and females (112). The length-weight relationship, condition factors, and fecundity of the crabs were determined. Growth parameters a and b of the length-weight relationship, (LWR) w = aL b , for S. africanus was 0.889, 5.029 and 0.713 for males, females and entire population, respectively. The values of b estimated were 2.475, 3.185 and 2.567 for males, females and whole population, respectively. The regression equation for the LWR are W=-0.046 + 2.475L for males, W= 0.717+3.185L for females and W=-0. 147 + 2.567L for the total crab population. The coefficient of determination of males, females and entire population were 0.716, 1.049 and 0.699, respectively, showing a strong correlation between the variables. There was a strong relationship (r 2 = 0.81) between length and weight of males and females and the entire crab population. The LWR was allometric for all crabs. Results also show that there is a weak correlation (r 2 = 0.36) between fecundity and total body weight (BW)/carapace length (CL) of the crabs. The length-weight distribution pattern did not show remarkable differences between species, sexes, and populations. Length-weight relationships have no influence on the fecundity. Mean (± SE) fecundity (292.8 ± 76.07 eggs) was positively related (r 2 = 0.75) to CL. Fecundity ranged between 120 and 449 eggs with a mean diameter of 1.66 mm ± 0.068 mm. No relationship between egg size and carapace length was found. There was no significant difference (P > 0.01) in condition factors between the sexes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Length-Weight Relationships, Condition Factor and Fecundity of the West Africa Freshwater Crab, <i>Sudanonautes africanus</i> (Milne-Edwards 1883), in Western Nigeria

Olusoji¹,

Anifowose²,

Sodamola³

2010

West African Journal of Applied Ecology

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“…The values of b ranged from 2.04 to 3.24 for Callinectes sapidus (Stickney, 1972). Growth was isometric (3.04) value in the length-weight relationship study of portunid crab, Callinectes pallidus (Bello- Olusoji et al, 2006). Change of 'b' values depends primarily on the shape and fatness of the species.…”

Section: Resultsmentioning

confidence: 99%

Carapace Width -Weight Relationship Of Mud Crab Scylla Serrata (Forskal, 1775) Collected From Pulicat Lake, Tamilnadu, India

Gayathre

Felix

Durairaja

2016

IRA-JAS

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Length-weight relationship and stomach content of Portunid crab <i>Callineces pallidus</i> (de Rouchebrune 1883) from the Gulf of Guinea

Cited by 2 publications

References 0 publications

Length-Weight Relationships, Condition Factor and Fecundity of the West Africa Freshwater Crab, <i>Sudanonautes africanus</i> (Milne-Edwards 1883), in Western Nigeria

Length-Weight Relationships, Condition Factor and Fecundity of the West Africa Freshwater Crab, <i>Sudanonautes africanus</i> (Milne-Edwards 1883), in Western Nigeria

Carapace Width -Weight Relationship Of Mud Crab Scylla Serrata (Forskal, 1775) Collected From Pulicat Lake, Tamilnadu, India

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