Animal Science (Zoology)
http://hdl.handle.net/10386/2795
2024-03-29T08:26:32ZEffects of bee pollen inclusion on performance and carcass characteristics of broiler chickens
http://hdl.handle.net/10386/4256
Effects of bee pollen inclusion on performance and carcass characteristics of broiler chickens
Nemauluma, Munyadziwa Felicia Dorcus; Manyelo, Tlou Grace; Ng'ambi, Jones Wilfred; Kolobe, Sekobane Daniel; Malematja, Emmanuel
This study was conducted to determine the effect of bee pollen(BP) inclusion on performance and carcass characteristics in broiler chickens. A total of 240 Ross 308 broiler chicks were allocated to 4 treat-ments (BP inclusion levels of 0,4,8, or 12 g/kg DM feed) in a randomized complete block design with sex as a block having 3 replicates with 10 chickens per repli-cate. After 21 d, the chickens remained in their treat-ment groups and fed standard grower diet. The results of the current study revealed that BP inclusion had posi-tively improved (P<0.05) average weekly feed intake (FI), bodyweight (BW), bodyweightgain (BWG), and feed conversion ratio (FCR) in both sexes. How-ever, the apparent nutrient digestibility, metabolizable energy (ME), and nutrient digestibility were not affected by the dietary BP. Furthermore, carcass yield in both sexes was improved (P<0.05) by BP inclusion levels. Incontrast, meat pH, shearforce, and sensory evaluation in both sexes were not affected (P>0.05). The results suggest that the broiler chicks can utilize bioactive compounds in BP when supplemented in the starter diets and subsequently improve their growth parameters throughout the growing period as well as carcass yield at slaughter age. These positive improve-ments could be due to high quality amino acids, essential oils, vitamins, and minerals of BP. Therefore, it is con-cluded that BP inclusion level of 12g /kg or more in the starter diets could have positive effects on growth per-formance and carcass yield at slaughter age without causing adverse effects on meat physico-chemical prop-erties and sensory evaluation in both male and female broiler chickens.
Journal article published in the Journal of Poultry Science 102:102628
2023-01-01T00:00:00ZNeoalbionella izawai n. sp. from the smallfin gulper shark Centrophorus moluccensis Bleeker and additional host records for N. etmopteri (Yamaguti, 1939) off South Africa
http://hdl.handle.net/10386/4157
Neoalbionella izawai n. sp. from the smallfin gulper shark Centrophorus moluccensis Bleeker and additional host records for N. etmopteri (Yamaguti, 1939) off South Africa
Dippenaar, Susan M.
Neoalbionella O¨ zdikmen, 2008 comprises
10 accepted species, which all infect sharks of
Squaliformes and Carcharhiniformes. Adult females
belonging to species of Neoalbionella, based on the
maxillule palp armed with three setae and the maxilliped subchela claw with only one secondary denticle, were collected from sharks off the coast of South
Africa. Neoalbionella izawai n. sp. collected from the
anterodorsal part of the spiracle opening of Centrophorus moluccensis Bleeker differs from its congeners by having maxillae that are separated except at
the tapering tips where they are fused and that are
longer than the trunk, uropods originating from the
pointed posterior margin of the trunk and that are well
developed, and maxillipeds without an additional
spine at the base of the subchela barb. Neoalbionella
etmopteri (Yamaguti, 1939) is herein reported from
two new hosts (Etmopterus spp.) off South Africa.
Journal article published in the journal of Syst Parasitol (2020) 97:669–673
2020-01-01T00:00:00ZClassification and regression tree analysis to predict calving ease in Sussex heifers using pelvic area dimensions and morphological traits
http://hdl.handle.net/10386/4038
Classification and regression tree analysis to predict calving ease in Sussex heifers using pelvic area dimensions and morphological traits
Bila, Lubabalo; Tyasi, Thobela Louis; Fourie, Pieter; Katikati, Aphiwe
Objectives: The objective of this study was to assess the relationship between pelvic measurements, namely pelvic height (PH), pelvic area (PA), and pelvic width, and linear body measurement traits, such as hindquarters width, rump length (RL), hip height (HH), body weight (BW),
shoulder height, chest depth (CD), body length, and also calve birth weight (CBW) under different
calving ease scores, namely no assistance, gently pull, and hard pull.
Material and Methods: A total of 51 first calf Sussex heifers at 24 months old, weighing approximately 440 ± 40.26 kg, were used for this study. Two-year-old bulls (n = 2), weighing approximately 800 kg, were used for mating the 51 heifers with a bull to cow ratio of 1:30 and 1:21. The
fertility of bulls was assessed by a private veterinarian before the mating season. Calving ease was
scored as follows: 1 = no assistance during parturition (normal), 2 = heifer assistance as gently
pull, 3 = heifer assistance as hard pull, 4 = heifer cannot calf, 5 = heifer calved a dead calf, and 6 =
heifer calf with the abnormal position.
Results: Descriptive statisticsindicated that PH (p < 0.01) and RL (p < 0.05) were positively remarkable and different among calving ease scores. Correlation results of the no assistance Sussex
heifers group revealed that CBW was positively correlated (p < 0.05) with PH. Classification and
regression tree CART results demonstrated that PH, BW, CD, and HH play an important role in
predicting calving ease in Sussex heifers.
Conclusion: The findings suggest that there is an association among PAs and biometric traits. The
present study might help farmers select animals with higher PH, BW, CD, and HH during breeding
to lower dystocia incidents during parturition. However, further studies need to be carried out in
CART modeling to reduce dystocia in a larger sample size of Sussex heifers or other cattle breeds.
Journal article published in the Journal of Advanced Veterinary and Animal Research, 8(1): 164–172, March 2021
2021-01-01T00:00:00ZMolecular taxonomy and subgeneric classification of tapeworms of the genus moniezia blanchard, 1891 (Cestoda, Anoplocephlidae) in nothern cervids (Alces and Rangifer)
http://hdl.handle.net/10386/3543
Molecular taxonomy and subgeneric classification of tapeworms of the genus moniezia blanchard, 1891 (Cestoda, Anoplocephlidae) in nothern cervids (Alces and Rangifer)
Chilton, Neil B.; O’Callaghan, Michael G.; Beveridge, Ian; Andrews, Ross H.
Multilocus enzyme electrophoresis (MEE) was used to genetically compare Moniezia spp. collected from sheep and cattle in southern Australia. Fifteen enzyme loci were established for the genetic characterisation of individual specimens of Moniezia, which represents a significant increase in the number of loci that was previously available
for these cestodes. Another four enzyme loci were also
identified as providing potential genetic markers. There
were no differences in staining activity or banding patterns
of different body regions of individual cestodes. Fixed genetic differences between Moniezia expansa and Moniezia benedeni were detected at 10 (77%) loci. Individuals that
lacked the diagnostic morphological characters (i.e. the arrangement pattern of the interproglottidal glands) could be assigned to either morphospecies based on their MEE
profiles. Genetic differences were also detected among individuals of the two morphospecies. One specimen of M. expansa had fixed genetic differences at 33% of enzyme loci when compared to all other specimens of M. expansa. Fixed genetic differences were also detected between the two groups of M. benedeni at 12 of 13 (92%) enzyme loci. This magnitude of genetic difference was greater than that detected between the two morphospecies. This provides evidence for the existence of cryptic species in the genus Moniezia.
Int
Parasitol Research (2007) 100:1187–1192
DOI 10.1007/s00436-006-0388-4
2007-01-01T00:00:00Z