Research Article
Seasonal and Sex Variations in Live Weights of Captive African Giant Rats Cricetomys gambianus, Waterhouse) in the Northern Guinea Savannah Zone of Nigeria

T. Dzenda, J.O. Ayo, C.A.M. Lakpini and A.B. Adelaiye

International Journal of Zoological Research, 2011, 7(1), 49-58.

Abstract

Adult African giant rats (Cricetomys gambianus, Waterhouse) were live-trapped in Zaria, Nigeria over a period of three years, cutting across all the seasons of each year. They were sexed and weighed immediately after capture, with the aim of determining changes in their live weights with seasons and sex. The overall live weight (Mean±SEM) of the African giant rats was 1.21±0.01 kg (n = 363). The live weight of African giant rats captured during the rainy season (1.17±0.02 kg) was significantly lower than that during the harmattan (1.25±0.02 kg; p<0.01) and hot-dry (1.23±0.02 kg, p<0.05) seasons. The male live weight of 1.28±0.01 kg was significantly higher (p<0.0001) than that of the female (1.14±0.01 kg). Male-biased sexual size dimorphism was observed during all the seasons, but was highest during the hot-dry season. The seasonal variation in live weight may be because food was more available in the wild during the harvest (dry) seasons (harmattan and hot-dry seasons) than the planting (rainy) season. The relatively low ambient temperature and relative humidity of the harmattan season was more favourable to growth, which may account for the higher live weight recorded during the season. The sex variation in live weight may be as a result of differential growth rate/time between the sexes. In conclusion, the African giant rats are lightest during the rainy season and the live weight of the male is higher than that of the female regardless of the season.

ASCI-ID: 46-158

Cited References Fulltext

Similar Articles


Effects of Bacterial Endotoxin (LPS) on Cardiac and Synaptic Function in Various Animal Models: Larval Drosophila, Crayfish, Crab and Rodent

International Journal of Zoological Research, 2020, 16(1), 33-62.

An Early Evaluation of Coral Disease Prevalence on Panjang Island, Java Sea, Indonesia

International Journal of Zoological Research, 2014, 10(2), 20-29.

Cited By


Diurnal, seasonal and sex variations in rectal temperature of African giant rats (Cricetomys gambianus, Waterhouse)

Journal of Thermal Biology, 2011, (), . DOI: 10.1016/j.jtherbio.2011.03.010

Seasonal, sex and live weight variations in feed and water consumptions of adult captive African Giant rats (Cricetomys gambianus, Waterhouse - 1840) kept individually in cages : Feed and water consumptions of African Giant rats

Journal of Animal Physiology and Animal Nutrition, 2012, (), no. DOI: 10.1111/j.1439-0396.2012.01287.x

Short communication: effect of saccharomyces cerevisiae supplementation on some biomarkers of oxidative stress in weaned rabbits during the hot-dry season

World Rabbit Science, 2016, 24(1), 67. DOI: 10.4995/wrs.2016.1656

Diurnal, seasonal, and sex patterns of heart rate in grip-restrained African giant rats (Cricetomys gambianus , Waterhouse)

Physiological Reports, 2015, 3(10), e12581. DOI: 10.14814/phy2.12581

Pycnogenol® supplementation improved the erythrocyte stability of packed donkeys during the late hot-dry season in Zaria, Nigeria

Comparative Clinical Pathology, 2018, (), . DOI: 10.1007/s00580-018-2826-y

Daily rhythms of rectal and body surface temperatures in donkeys during the cold-dry (harmattan) and hot-dry seasons in a tropical savannah

International Journal of Biometeorology, 2018, (), . DOI: 10.1007/s00484-018-1626-z

Ergonomic study of donkeys administered with Pycnogenol® and subjected to packing during the hot-dry season in Northern Nigeria

Tropical Animal Health and Production, 2018, (), . DOI: 10.1007/s11250-018-1702-8

Changes in feed consumption and water intake among broiler chickens subjected to melatonin treatment during the hot-dry season

Tropical Animal Health and Production, 2019, (), . DOI: 10.1007/s11250-019-02061-3

Ascorbic acid influenced respiratory and drinking responses in pack donkeys during harmattan

Savannah Veterinary Journal, 2018, (), 41. DOI: 10.36759/svj.2017.010

How does Spix's yellow-toothed cavy (Galea spixii Wagler, 1831) face the thermal challenges of the Brazilian tropical dry forest?

Journal of Thermal Biology, 2020, 88(), 102525. DOI: 10.1016/j.jtherbio.2020.102525

Morphology of the spinal nerves from the cervical segments of the spinal cord of the African giant rat (Cricetomys Gambianus)

Anatomia, Histologia, Embryologia, 2021, 50(2), 300. DOI: 10.1111/ahe.12630

Daytime Evaluation of Oxidative Stress and Behavioural Parameters of Donkeys (Equus asinus) During The Hot-Dry and Cold-Dry (Harmattan) Season in a Tropical Savannah

Journal of Applied Animal Welfare Science, 2021, (), 1. DOI: 10.1080/10888705.2021.1894146

Modulatory effects of lycopene and vitamin E on cloacal temperature, thyroid hormonal and reproductive performance responses in laying hens during the hot-dry season

Journal of Thermal Biology, 2021, (), 103105. DOI: 10.1016/j.jtherbio.2021.103105