Open Access Original Research Article

Size Frequency Distribution, Length-length and Weight-length Relationships and Condition Factor of Eight Fish Species of Nkam River, Coastal Cameroon

Claudine Tekounegning Tiogué, Evrard Kouopestchop Medjo, Franklin David Ndilock Makongo

Asian Journal of Research in Zoology, Page 1-12
DOI: 10.9734/ajriz/2020/v3i130079

Aims: To assess the aquaculture potential of endogenous species in their habitat for domestication and preservation.

Study Design: Growth performances of fish caught was analyzed by family, species, sex and month.

Place and Duration: This study was conducted from April 12 to June 28, 2016 at CREVS (Cameroon Reptiles and Ecosystems Valorization Society) located in the District of Yabassi, Department of Nkam, Coastal Region of Cameroon.

Methodology: A total of 160 fishes were collected by quantitative sampling for 3 months in the Nkam River.

Results: It appears that two families of fish were recorded: the Cyprinidae (Labeo sanagaensis) and the Cichlidae (Tilapia cameronensis, Sarotherodon galilaeus sanagaensis, Sarotherodon nigripinnis dolloi, Tylochromis sudanensis, Hemichromis elongatus, Tylochromis trewavasae and Chromidotilapia gutheri gutheri). L. sanagaensis recorded the highest relative abundance (30%) against 3.13% (C. gutheri gutheri). Large fish were recorded in the majority of species in males, except in T. trewavasae and H. elongatus. The average total length was 23.71 ± 8.31 cm and the average total weight was 266.11 ± 200.96 g. Size frequency distribution of fish was bimodal with a large mode at size 20 cm and a small at size 36 cm. Small fish were abundant in catches especially in S. nigripinnis dolloi and C. gutheri gutheri. The allometric coefficient b of the weight-length relationship averaged 3.01 ± 0.87. The fish presented three types of growth: isometric, positive and negative allometric, and the condition factor K was greater than 1.

Conclusion: It was concluded that these fish species could in general be potential candidates for domestication.

Open Access Original Research Article

The Activity Budget of Adult Chimpanzees (Pan troglodytes troglodytes) and Environmental Conditions in Mefou Primate Sanctuary, Centre Region, Cameroon

Melle Ekane Maurice, Olle Ambe Flaubert Gildas, Bekarikoh Najembe Ekale, Jeta James Fawoh

Asian Journal of Research in Zoology, Page 13-25
DOI: 10.9734/ajriz/2020/v3i130080

Time is a limited parameter of various activities for most wild animals. The study of time budget allotment among various diurnal activities such as feeding, resting, grooming, travelling is essential for the characterization of living and working manner of a primate species, which lay the foundation for interrelating ecology and the behaviour of the species. The survey was focused on determining the activity budget of chimpanzees and their environmental needs in Mefou primate sanctuary. The research data collection was initiated after a brief pilot study of the study area and the animal group. A 4-month-data collection from April – July was carried out and was done the first 10 days of each month, from 8:00am – 6:00pm. The activities of the focal animal observed were recorded alongside the scan data obtained in a 15-minute-interval period. Additionally, observations were recorded on environmental changes. The research data was analyzed by the use of chi-square statistical model. The focal animal revealed a significant relationship on activity budget, X2 = 23.818 df=6, p=0.001. Resting (30%), movement (28%) and feeding (22%) dominated the activity budget profile, while grooming (9%), aggression (6%), play (3%) and climbing (2%) were the least activities observed. The Adult chimpanzees’ behavior showed an association on weather type, X2 = 15.801 df=3, p=0.001 and X2 = 28.975 df=18, p=0.049, respectively. Seasonality witnessed a weak association on the adult animals, X2 = 2.492 df=6, p<0.05. Also, a weak significance was recorded on social activity and seasonality, X2 = 1.379 df=6, p<0.05. This survey discovered that the activities of the adult chimpanzees witnessed alterations due to the changes of environmental conditions.

Open Access Original Research Article

Influence of Season and Day Length on Production and Reproductive Traits and Egg Characteristics of the Guinea Fowl (Numida meleagris)

Korankye Okyere, James Kwame Kagya-Agyemang, Serekye Yaw Annor, Akwasi Asabere-Ameyaw, Clement Gyeabour Kyere

Asian Journal of Research in Zoology, Page 26-34
DOI: 10.9734/ajriz/2020/v3i130081

Aims: This study was conducted to determine the influence of season and day length on production traits, egg characteristics, fertility and hatchability of laying Guinea fowls (Numida meleagris).

Study Design: Factorial design was used for the study.

Place and Duration of Study: The study was conducted at the Poultry Unit of the Department of Animal Science Education, University of Education, Winneba, Ghana, Mampong campus from September, 2015 to December, 2016.

Methodology: Four (4) hens and one (1) male per replicate and fifteen (15) per treatment were each subjected to 12 hours of artificial light and 12 hours of darkness (12L:12D), 14hours of artificial light and 10 hours of darkness (14L:10D), 16hours of artificial light and 8 hours of darkness (16L:8D) and 18hours of artificial light and 6 hours of darkness (18L:6D). Each group was replicated three times and reared in three seasons (Dry-December-March, Major rains-April-July and Minor rains-August-November) in a 3x4 factorial experiment. Data were analyzed using General Linear Model procedure of SAS.

Results: Results showed that egg weight, hen-day egg production and egg mass increased (P= .05) with increasing day length. Similar results were observed for yolk height, yolk weight and albumin height. Most production traits, egg characteristics, fertility and hatchability attained the highest (P= .05) value in the major rainy season.

Conclusion: It was concluded that day length of 14-16 hours is sufficient for improved laying performance and that breeding cycles should be planned to coincide with the major rainy season.

Open Access Original Research Article

Nutritional and Serum Biochemistry of the Edible Frog Hoplobatrachus occipitalis in Rivers State, Nigeria

S. O. Oyibo, G. C. Akani, C. C. Amuzie

Asian Journal of Research in Zoology, Page 35-41
DOI: 10.9734/ajriz/2020/v3i130082

This paper investigated the proximate, minerals and serum biochemistry in Hoplobatrachus occipitalis. The proximate and selected minerals of edible frog Hoplobatrachus occipitalis were determined using standard analytical methods. The result showed that crude protein was 16.91% carbohydrate was 1.76%, crude fibre 2.85%, The fat was 4.96% ash content was 1.84% and moisture was 71.67%. The selected mineral constituent recorded showed that sodium> iron> calcium > potassium > manganese. The nutritive serum biochemistry was determined in male and female species, the results revealed that both sexes have high nutritional profile suitable for human consumption; nevertheless, the female species have higher nutritional values than the males.

Open Access Original Research Article

Growth and Mortality of Sillago sihama (Forsskål) from Karachi Coast, Pakistan

Abdul Baset, Qun Liu, Baochao Liao, Abdul Waris, Han Yanan, Zhang Qingqing, Imtiaz Ahmad

Asian Journal of Research in Zoology, Page 42-52
DOI: 10.9734/ajriz/2020/v3i130083

Length frequency data of silver sillago, Sillago sihama (Forsskål) were collected and measured from the fisherman catches using beach seines and handlines, at random, during 2012 from the Karachi coast of Pakistan. In this study, 1846 fish individuals (male and female combined) were collected ranging from 10 to 24 cm with dominant individuals ranged 12 to 16 cm (total length). Weight ranging was measured from 9 to 110 g. The above length-frequency data were analysed for the estimation of growth and mortality parameters. The power coefficient b of length-weight, the relationship was estimated at 2.9177. The estimated von Bertalanffy growth, function parameters of 25.20 cm (L) and 1.00 year-1 (K) were calculated by ELEFAN method equipped on FiSAT computer package. With length-converted catch curve analysis, the total mortality rate (Z) and its 95% confidence interval were 2.42 (2.174-2.669) year-1. The natural mortality rate (M) was 1.84 year-1 calculated with Pauly’s equation (the annual average seawater temperature was 27°C). Therefore, the fishing mortality rate was Z-M= 0.5787year-1. The exploitation ratio (E) estimated as F/Z=0.239 which is less than biological reference point (0.5), therefore it indicates that the stock of S. sihama was exploited at managed.