Food and Feeding Habits, Growth Pattern and Fecundity of Callinectes amnicola in Lagos Lagoon

M, Ezekiel Onyekachi; Bernard, Edah

doi:10.15406/apar.2014.01.00005

Cited by 3 publications

(4 citation statements)

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“…A study by Chazaro-Olvera et al (2000) on the gut content and feeding of Callinectes similis on the central continental shelf off Veracruz in the Gulf of Mexico revealed several groups of food items in the diet including: plant fragments, remains of fish, polychaetes, crustaceans (Farfantepenaeus aztecus and Portunus gibbesii), micromolluscs (Mulinia lateralis) and detritus. Warner (1977), Lawal-Are (1998) and Ezekiel and Bernard (2014) also observed that the stomach contents of C. amnicola include mollusc shell parts, fish scales and bones and shrimp appendages, but concluded that mollusc shell parts constituted the most important dietary material. An examination of the stomach contents of 809 king crabs Paralithodes camtschatica (Tilesius) from near Kodiak Island, Alaska, also revealed that mollusca (mainly the bivalves Nuculana spp., Nucula tenuis and Macoma spp.)…”

Section: Discussionmentioning

confidence: 99%

“…Hence, he classified blue crabs as dietary opportunist, feeding upon locally and seasonally available prey species with distinct temporal and spatial feeding patterns. A few published works on the food and feeding habit of this crab in Nigeria further illustrates the influence of environment, seasonality and prey availability as blue crabs were observed to be carnivores (Ezekiel andBernard, 2014), predator carnivore (Emmanuel, 2008), scavengers and omnivores (Chindah et al, 2000), opportunistic omnivores (Lawal-Are and Kusemiju, 2000;Arimoro and Idoro, 2007;Lawal-Are, 2009), opportunistic carnivores (Lawal-Are, 2003), among others. This study seeks to evaluate the spatial and potential patterns of trophic segregation, feeding performances, in addition to diet breadth, overlap and comparison (how dispersed or similar they are) of blue crab C. amnicola between two mangrove locations in southeast Nigeria.…”

Section: Introductionmentioning

confidence: 88%

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DIETARY SPECTRUM, DISPERSITY AND OVERLAPS OF BLUE CRAB (Callinectes amnicola, DE ROCHEBURNE) FROM SOUTHEAST NIGERIA

Udoh

Jimmy

2015

CJF

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Blue crabs Callinectes amnicola are primarily described as carnivores (with more than 70% of animal food content in stomachs), but an assessment of the stomach contents of 239 and 245 crabs from the Qua Iboe River (QIRE) and Imo River estuaries (IRE), respectively, from January -December 2008, indicate the species exhibited a generalist and unspecialized carnivore feeding habit with animal food content <70% (61.15% and 56.03% in QIRE and IRE, respectively) during the study period. Eighteen dietaries in seven main food categories were identified and classified into four trophic levels: nekton (fish bones and scales), detritus (sediments), plants (algae and sea grasses) and zoobenthos (molluscs and insects). Fish and sediments were the primary food resources for QIRE crabs. The dendrogram plot, using cluster analysis, indicated four groups. The crabs from IRE exhibited higher diet generalization, wider diet breadth (feeding on sediments, fish, plants and molluscs), higher feeding intensity and condition factor than those of QIRE. Crabs from both locations exhibited similar dietary quality (index of biotal dispersity, IBD>60%) but dissimilar dietary quantity since diet overlap (< 60%) and diet breadth (B < 1) were low. Hence, crab combines its ability to switch from one food category to another with a tendency for carnivoredetritivore in IRE to omnivore-carnivore in QIRE, relative to abundance of food/prey items in its environment.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

DIETARY SPECTRUM, DISPERSITY AND OVERLAPS OF BLUE CRAB (Callinectes amnicola, DE ROCHEBURNE) FROM SOUTHEAST NIGERIA

Udoh

Jimmy

2015

CJF

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“…Specimens smaller than 5 cm in size tend to have a scavenger-type diet, while those whose size is between 5 and 10 cm are carnivorous . In the Lagos lagoon (Nigeria), diet is composed of lobsters, fish, mollusks, and crabs (Onyekachi and Edah, 2014). Maintaining the focus on Nigeria, diet in the Okpoka River is composed of crustaceans, fish, mollusks, annelids, algae, sand particles, and crab parts .…”

Section: Callinectes Amnicola (Rochebrune 1883)mentioning

confidence: 99%

“…The authors have suggested that knowledge be improved relative to the estimation and exploitation of stocks as well as to the biological understanding necessary for a successful breeding of Callinectes amnicola (Rochebrune, 1883) and Cardisoma armatum (Herklots, 1851). Considering the full breadth of diversity in crab species in West African lagoons (Monod, 1956;Manning and Holthius, 1981) and in view of the scientific knowledge produced on this zoological group so far (Akin-Oriola et al, 2005;d'Almeida et al, 2006;Arimoro and Idoro, 2007;d'Almeida et al, 2007;d'Almeida et al, 2009;d'Almeida et al, 2009;d'Almeida et al, 2010;Udoh and Nlewadim, 2011;Omuvwie and Atobatele, 2013;Olakolu and Fakayode, 2014;Sankare et al, 2014 a;Onyekachi and Edah, 2014;d'Almeida et al, 2014), it appears necessary to have a review in order to establish what the current understanding on this group of crustacean is. We review known lagoon crab species in the Gulf of Guinea, their biology, and exploitation in order to identify relevant research prospects for this zoological group.…”

Section: Introductionmentioning

confidence: 99%

Diversity, biology and exploitation of brackish water crabs in West Africa: A review

Dessouassi¹,

Chikou²,

Lederoun³

et al. 2019

Int. J. Bio. Chem. Sci

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Crabs are an important biological component of the West African lagoon fauna and are exploited by fishing communities. This paper presents a synthesis of the current understanding pertaining to the diversity, biology and exploitation of these crabs in order to identify promising research paths for this zoological group. A literature review was done. Thirty-two species belonging to thirteen families and twenty-three genera have been indexed by previous investigators and we plan on making use of this information in defining future research direction. The biology of crabs has been the subject of much research focused on Callinectes amnicola (Rochebrune, 1883) species. C. amnicola is an omnivorous species whose males are known to mature between 63 and 105 mm shell width, while females mature between 83.5 and 116.2 mm shell width. Fertility varies from 0.47 to 4.8 million eggs per female. However, exploitation parameters for this species in various lagoons are not available. A research direction geared towards establishing a new and thorough inventory along with currently nonexistent but relevant exploitation parameters will go a long way in defining sustainable management measures for these crab species.

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Fecundity of Cardisoma Crassum Smith, 1870 in an Estuary of the Mexican Pacific

Vargas-Téllez¹,

Vázquez-López²

2020

BIOCYT

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Fecundity in crustaceans is generally defined as the number of eggs produced by a female during spawning season in particular and often expressed in terms of body size. Among the brachyuran there is considerable variation in fertility. This study aimed to estimate fecundity in Cardisoma crassum Smith, 1870 which is important mangrove ecosystem specie as it helps in the process of degradation of organic matter produced by the mangrove forest. A total of 17 ovigerous females were collected, with an average weight of 122.9 ± 32.54 g. The average carapace width was 60.03 ± 7.64 mm and 46.97 ± 4.6 mm in length. The ovigerous mass presented an average weight of 11.78 ± 2.9 g (fresh weight) and 1.612g ± 0.53 g (dry weight). The average number of eggs was 475457.6 ± 117316.8 and 317598.62 ± 116069.60 in fresh and dry weight, respectively. The number of eggs accounted for C. crassum is in the range of eggs produced by other gecarcinides.

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Food and Feeding Habits, Growth Pattern and Fecundity of Callinectes amnicola in Lagos Lagoon

Cited by 3 publications

References 9 publications

DIETARY SPECTRUM, DISPERSITY AND OVERLAPS OF BLUE CRAB (Callinectes amnicola, DE ROCHEBURNE) FROM SOUTHEAST NIGERIA

DIETARY SPECTRUM, DISPERSITY AND OVERLAPS OF BLUE CRAB (Callinectes amnicola, DE ROCHEBURNE) FROM SOUTHEAST NIGERIA

Diversity, biology and exploitation of brackish water crabs in West Africa: A review

Fecundity of Cardisoma Crassum Smith, 1870 in an Estuary of the Mexican Pacific

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