Abstract
One hundred sexually matured snails, fifty each of the black skinned and white skinned ectotypes were used in the evaluation of reproductive performance and egg quality traits in a study that lasted for eighty-four days. The reproductive performance traits measured included clutch size (number of eggs laid per clutch), incubation period (days) of eggs, percent hatchability, and percent mortality and survivability, while the egg quality traits evaluated included egg weight and length. Results obtained showed significant differences at different levels among parameters measured in the two ectotypes of snails studied. The results of reproductive traits showed that mean clutch sizes were 5 and 4 for black skinned and white skinned ectotypes respectively. Mean incubation periods were 25.8 days for the black skinned ectotype and 22 days for the white skinned ectotype. The values for mean percent hatchability were 26.8 % and 22.8 % for the black skinned and white skinned ectotypes respectively. Mean survivability values were 22.8 % for black skinned ectotype and 20 % for the white skinned ecotype. The mean egg quality parameters were 2.7 g and 2.4 g, weight for black skinned and white skinned ectotypes respectively. The mean egg lengths were 4.6 mm and 4.2 mm for black skinned and white skinned ectotypes respectively. Among the measured parameters, clutch size and egg length had very high significant difference (P
Highlights
Protein intake is one of the essential elements 1980, Adeyeye, 1996, Akinnusi, 2002 and Ejidike, of nutrition for growth and normal functioning of the 2002). Adeyeye (1996) further stated that the African body
Results of the reproductive performance traits for the two ectotypes are presented in Table 1, with mean clutch sizes of 5 and 4 for black skinned and white skinned ectotypes respectively
The significant values showed that the black skinned ectotype had larger clutch size and is more prolific than the white skinned ectotype
Summary
Protein intake is one of the essential elements 1980, Adeyeye, 1996, Akinnusi, 2002 and Ejidike, of nutrition for growth and normal functioning of the 2002). Adeyeye (1996) further stated that the African body. Results of the reproductive performance traits for the two ectotypes are presented, with mean clutch sizes of 5 (range 4 – 6) and 4 (range 3 – 5) for black skinned and white skinned ectotypes respectively. The clutch size values obtained in this study were lower than the 7.80 and 5.23 reported by Ibom et al (2008) for black skinned and white skinned ecotypes respectively.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
