Relationships among Phenotypic Traits of Giant African Land Snails in Western region of Nigeria (original) (raw)
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Journal of Agricultural Science, 2012
Four hundred (400) adult black-skinned snails, two hundred (200) each of Archachatina marginata and Achatina fulica with weight ranging from 50.42 g to 198.84 g and from 100.10 g to 184.00 g for A. marginata and A. fulica respectively selected based on active appearance, number of whorls and no injury on the foot and/or shell of a base population from a population gathered in the wild within the Niger Delta region were used for the study. Data collected on the selected snails were used to evaluate phenotypic correlations and multiple regression functions which were used for predicting body weights from quantitative traits. Results obtained from the study showed that A. fulica snails with 4 whorls are genetically heavier than A. marginata snails with 4 whorls. This is because there was large and significantly different (P<0.001) disparity in values of measured quantitative traits (mean body weights) among the two breeds. The results of phenotypic correlations among quantitative traits of the two breeds indicated positive, strong and very high significant (P<0.001) correlation coefficients (r p) between body weight and all body components studied. Whereas for A. fulica snails, there were positive but lower significant (P<0.05) phenotypic correlation coefficients (r p) between body weight and some body components studied. In fact, there were no significant (P>0.05) phenotypic correlation coefficients (r p) between shell length and shell 'mouth' width (r = 0.250) and between shell 'mouth' length and shell 'mouth' width (r = 0.187) for A. fulica snails. The prediction equations evolved for body weights of growing snails with 4 whorls using quantitative traits from A. marginata and A. fulica indicated that these quantitative traits, namely; shell length, shell width, shell 'mouth' length and shell 'mouth' width best predicted body weight for A. marginata and A. fulica snails with 4 whorls. The quantitative or phenotypic traits of the two breeds of snail studied could be chosen to differentiate as well as characterize growing snails in the Niger Delta region of Nigeria.
Nigerian Journal of Animal Production, 2020
1 Influence of breeds and number of whorls on phenotypic traits and correlations among giant African land snails in Nigeria * Okon, B., Ibom, L. A, Dauda, A., Bassey, A. E., Idiong, N. B. and Onwuka, P. O *Correspondence: profbasseyokon@gmail.com, GSM +234(0)803 418 3263 1 1 1 1 2 1
Asian Research Journal of Agriculture, 2017
Background: Giant African land snail (Archachatina marginata) is a micro livestock with potentials as a protein source especially among impoverished individuals. As such, it requires much research attention to fully unveil it genetic nature for possible improvements. Materials and Methods: Two hundred (200) snails consisting of one hundred (100) each of blackskinned ectotype and white-skinned ectotype were selected based on number of whorls from a population gathered in the wild within Cross River State for the study. Data collected on number of whorls from the two ectotypes of snails were used for predicting body weights from phenotypic traits. Results: The black-skinned ectotype body weight ranged from 0.70 g to 153.90 g, while the whiteskinned ectotype body weight ranged from 0.60 g to 72.10 g. The results obtained from the study showed positive, strong and very high significant correlation coefficients (p<0.001) between body weights and all body components measured based on 2 and 3 whorls for the two ectotypes of Original Research Article
Ethiopian Journal of Environmental Studies and Management
Data on hatchling body weights and morphometric traits (hatchling body shell length and hatchling body shell width) pertaining to two breeds of snails (A. marginata and A. achatina) from hatch to fourth (4 th) week of age were analyzed. This was used to obtain correlation coefficient of morphometric traits and to generate prediction equations for live body weight of the animals. Strong, positive and significant correlations between hatchling body weight and body shell width (r=0.82) and between hatchling body weight and body shell length (r=0.80) for A. marginata as well as between hatchling body weight and body shell length (r=0.81) and between hatchling body weight and body shell width (r=0.86) for A. achatina were obtained. Low coefficients of determination (R 2) were obtained with the range from 4.73% to 41.30% and from 2.12% to 50.20% for A. marginata and A. achatina respectively. Morphometric traits (Hatchling body shell length and body shell width) best predicted hatchling body weights of A. achatina and not of A. marginata snails. Strong, positive and significant correlations imply that selection for these morphometric traits will lead to improvement of hatchling body weights.
Asian Science Bulletin, 2024
Background and Objective: Prevailing climatic conditions of a given region affect the physiological and biochemical adjustment in snails. Numerous researches have been published on physiological parameters of commonly eaten Achatina achatina from different ecological zones in Northcentral and Western Nigeria. There is a paucity of updated information on the physiological indices of giant African land snails in Niger Delta regions of Nigeria. This research was aimed at evaluating the physiological indices of a commonly eaten giant African land snail (Achatina achatina) from 5 different ecological zones in Niger Delta regions of Nigeria. Materials and Methods: The 25 matured snails were purchased from farmers returning from the forests in Akwa Ibom, Abia, Bayelsa, Rivers and Cross River States, respectively for this study. The snails were transferred to the biochemistry laboratory for physiological analyses. Data obtained were subjected to analysis of variance using SPSS version 16.0 and least significant difference test was used to separate the means. Significance level was set at 5%. Results: Snails from Rivers State had higher significant (p<0.05) concentrations of protein (52.13±0.03), glucose (33.01±0.20) and lipid (20.80±0.04), respectively in their hemolymph than those recorded for other locations. The concentration of protein was higher than other metabolites in both hemolymph and the flesh of Achatina achatina across the 5 States. Achatina achatina snails obtained from Akwa Ibom state recorded higher and significant (p<0.05) values of dry matter (24.05±0.03), ash (1.84±0.02), crude fibre (1.02±0.01), fat (2.02±0.01), carbohydrate (1.09±0.02) and crude protein (22.20±0.04), respectively than those from other States of Niger Delta Region in Nigeria. No significant (p>0.05) difference was observed in Mg 2+ , PO 4 2+ and ClG across the 5 states. Conclusion: Locations that have effects on chemical composition of the hemolymph have been observed, but no substantial differences were recorded in the nutritional composition of Achatina achatina snails across the 5 Niger Delta States in Nigeria.
Growth and phenotypic traits of juvenile Achatina fulica snails in Mkpatak, Nigeria
Journal of Animal Science and Veterinary Medicine, 2024
Juveniles of Achatina fulica snails were selected from a population produced by three (3) mating groups (Black-Skinned X Black-Skinned [BS X BS], White-Skinned X White-Skinned [WS X WS], and Black-Skinned X WhiteSkinned [BS X WS]). One hundred and fifty (150) snails, with each mating group consisting of fifty (50) juvenile snails were used in this study to evaluate growth progress and phenotypic traits of juvenile Achatina fulica snails. The snails were grouped into three (3) treatments based on the mating groups and monitored for six (6) weeks using growth and phenotypic traits. Results obtained from this study indicated that there were highly significant differences (p<0.01) between the juveniles of the three (3) treatments and within the age groups for both growth and phenotypic traits. The results also showed that White-Skinned juveniles performed best for the growth traits, whereas all the snail groups performed well in terms of phenotypic traits. The results obtained in this study will be used as baseline information for farmers, researchers and snail breeders in the management and development of breeding stocks, thus leading to greater management and productivity for effective snail meat and protein availability in Nigeria. Keywords: Increment, juvenile, morphometric, snail, traits, young.
Asian Journal of Applied Sciences, 2016
Phenotypic qualities of two snail species commonly found in Calabar, Cross River State were studied. The snail species studied for comparing the differences and relationships between their phenotypic traits were Achachatina marginata(S) and Achatina fulica(L). A total of 100 snails were obtained and selected based on the presence of four whorls shells and used for the study. Parameters studied included body weight, body length, body width, shell mouth length and shell mouth width. Data collected were analyzed to obtain simple statistical values and phenotypic correlations between the two species. Data were also subjected to regression model for body weight predictions. Mean(X) body weights recorded were 135.250g and 137.554g for A. marginata and A. fulica, respectively. Only T-test results for body weight and shell mouth width were significantly(P<0.05) different; high, medium and low positive phenotypic correlations were observed between parameters measured. The highest positive...
Correlation, regression estimates and heterosis of Archachatina marginata snails in Calabar, Nigeria
Nigerian Journal of Animal Production, 2020
Eighty sexually mature Archachatina marginata snails, forty each of the black skinned and white skinned ectotypes were used in a study to estimate heterosis, correlation and regression. Data collected on the snails and their eggs included body weight (BWT), shell length (SLH), shell width (SWH), “mouth” length (MLH) and “mouth” width (MWH); and egg weight (EWT), egg length (ELH) and egg width (EWH), respectively. These data were used to estimate correlations between pairs of traits, heterosis and to predict weight from other morphometric traits among three mating groups [black skinned x black skinned (BAM X BAM), white skinned x white skinned (WAM X WAM) and their cross BAM X WAM)]. Results obtained from the study showed that evaluated traits expressed strong, positive and highly significant (P<0.01) correlation values that ranged from rp = 0.86 to rp = 0.99 among the snails mating groups. The correlation values of traits evaluated on eggs laid by these snails ranged from mild...
Asian Journal of Animal Sciences, 2016
Two hundred snails of various sizes consisting of hundred each of the black-skinned ectotype and white-skinned ectotype were used for this study. Body components measured were body weight, body shell length, body shell width, mouth shell length and mouth shell width for the two ectotypes. The number of whorls on snail shell considered for the study were 2, 3, 4 and 5. Data were analyzed using t-test and the results showed that all the body components between the two ectotypes were significantly different (p<0.05) based on the number of whorls. The white-skinned ectotype recorded higher percent body component increment for snails between 2 and 3 whorls, whereas the black-skinned snails recorded higher percent body component increment for snails with 3 and 4 whorls. This means that the two ectotypes besides their differences in foot colouration varied in terms of growth of body components. It is therefore suggested that both ectotypes of Archachatina marginata S.) should be tested for differentiation in growth of body components with higher number of whorls, as this will be very beneficial to breeders for genetic improvement of the snail
Genetics and biodiversity journal, 2021
Between February and May 2019, in the equatorial forest urbanized area of Cameroon (Mfoundi), a study was conducted and aimed to contribute on a better understanding of the biodiversity of edible snails for their genetic improvement and conservation. A total of 693 adult snails of two species: Archachatina marginata and Achatina fulica were collected in the various localities (Odza, Mbankolo, Biyem-assi, Nyom, Nkolbisson and Simbok). Information about biometric morpho characters was collected using a survey sheet, an electronic scale of 7000g capacity with accuracy of plus or minus 1g, a sliding foot with an accuracy of plus or minus 0.01 millimeter. A digital camera will be used for the subsequent morphological assessment of the animals. Results revealed significant influence of locality on all the morphobiometric characteristics. The shell color of A. marginata was black with yellowish stripes and the red tip was the most frequent (62.85%); while for the species A. fulica it was brown with white stripes and white tip (76.09%). The most common color of the foot in A. marginata was brown with white traces (41.70%) and in A. fulica, it was black (82.50%). The number of shell turns in A. marginata was higher in the localities of Mbankolo (5.36±0.12) and Odza (5.38±0.05) while in A. fulica it was higher in the locality of Simbok (7.41±0.49). Concerning body measurements (in mm), the total body length of A. marginata was higher in Nkolbisson (88.10±1.30) and that of A. fulica was greater in Simbok (112.25±12.16). The live weight (g) of A. marginata was higher in Mbankolo (70±0.00) on the other hand, that of A. fulica was higher in Simbok (80±0.02) and Nyom (80±0.12). The diversity observed suggests that edible snails constitutes rich natural genetic resources enough variability to envisage genetic improvement and develop preservation schemes for these snails mostly collected from wild.