COMPARATIVE ASSESSMENT OF YIELD AND MEAT QUALITY OF THREE GIANT AFRICAN LAND SNAIL SPECIES AT DIFFERENT AGE GROUPS
COMPARATIVE ASSESSMENT OF YIELD AND MEAT QUALITY OF THREE GIANT AFRICAN LAND SNAIL SPECIES AT DIFFERENT AGE GROUPS
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Date
2021-03
Authors
JUMAH, Fatimah Adeitan
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Abstract
This study was conducted to evaluate the effects of species and age on the yield and quality of
edible snail meat. A total of 180 snails were sourced from Merchant Farms, Ibadan, Oyo State.
Thirty (30) snails each from the young and mature of Achatina achatina, Achatina fulica and
Achachatina marginata were used in a 3 x 2 x 4 (specie x age x storage time) factorial
arrangement in a Completely Randomized Design. The live weight, mouth width, shell length
and shell width were taken. Sensory evaluation was carried out on the fried snail meat from each
specie, from the two age groups (young and mature). Samples of the fried snail meat were also
evaluated for microbial count (total aerobic and coliform) for a 21-day storage period (0, 7, 14
and 21) using the standard plate count procedure of serial dilution. The results showed that the
chemical composition of the three species at both ages (young and mature) differ significantly
(P<0.05) different. Crude fiber was not found in all the species and the age groups. Crude protein
and ether extract of A. marginata differed significantly (P<0.05) from the other two species
while A. fulica differed significantly (P<0.05) in ash content. Similarly, age significantly
(P<0.05) influenced ether extract with mature ones having the highest value. Conversely, the
young have more ash content than the mature snails (P<0.05). There were significant (P<0.05)
differences in carcass weight, meat yield, yield of viscera and cooking loss; with A. marginata
recording highest in all the parameters investigated. Specie difference also significantly (P<0.05)
influenced shell weight, shell length, shell width, mouth length and mouth width; with A.
marginata recording the highest values in all the parameters. Results from organoleptic
assessment showed that A. marginata at mature stage were most preferred by the panelists
However age, species and storage days significantly (P<0.05) influencedthe total aerobic count
obtained. It can be concluded that optimum yield can be obtained from A. marginata at both
young and mature stage. A. marginataat mature stage had the highest crude protein andwas
generally accepted by the panelists, while A.fulica had more minerals at both young and mature
stage also the microbial load at all the storage periods were not above the borderline for ready to
eat meat product. However, above day 0 TAPC during the storage period revealed thatday 7 had lower microbial load than day 14, and 21.
Description
A DISSERTATION SUBMITTED TO THE SCHOOL OF POSTGRADUATE
STUDIESAHMADU BELLO UNIVERSITY IN PARTIAL FULFILLMENT OF THE
REQUIREMENTS FOR THE AWARD OF MASTER OF SCIENCE IN ANIMAL SCIENCE
DEPARTMENT OF ANIMAL SCIENCE,
FACULTY OF AGRICULTURE,
AHMADU BELLO UNIVERSITY,
ZARIA, NIGERIA
Keywords
COMPARATIVE ASSESSMENT,, YIELD,, MEAT QUALITY,, THREE GIANT AFRICAN LAND SNAIL SPECIES,, DIFFERENT AGE GROUPS.