Open Access Original Research Article

Dietary Effects of Almond (Prunus amygdalus dulcis) Seed Powder on the Reproductive Indices in Male African Catfish (Clarias gariepinus) Broodstock

Dada Adekunle Ayokanmi, Elemuo Chioma Cynthia, Oke Israel Opeyemi

Asian Journal of Fisheries and Aquatic Research, Page 1-11
DOI: 10.9734/ajfar/2019/v5i230069

Aims: To examine the dietary effects of Prunus amygdalus dulcis seed meal on the sperm quality of male African Catfish (Clarias gariepinus).

Place and Duration of Study: The experiment was carried out at the Department of Fisheries and Aquaculture Technology Teaching and Research Farm, The Federal University of Technology, Akure for a period of 70 days.

Methodology: Five diets with crude protein of 40% were formulated with different inclusion levels of P. amygdalus dulcis seed powder. D1 (control) has 0 g of the powder, while D2, D3, D4 and D5 has 5, 10, 15 and 20 g of the P. amygdalus dulcis seed powder in 100 g of feed respectively. A total of 45 C. gariepinus were randomly distributed into 15 concrete tanks (2×2×1.5 m) at stocking density of 3 fish per tank and constant water level of 1 m was maintained in the experimental tanks. The fish were fed at 3% of body weight twice a day between 08.00-09.00 and 16.00-17.00 hours for a period of 70 days. At the end of the 70-day experiment, gonadosomatic index and reproductive indices such as milt volume, motility duration, spermatozoa count, percentage motility, percentage fertilization, percentage hatchability and percentage survival of fry were determined. The qualities of the milt were assessed by aid of microscope and by fertility tests. Histological examination of the testes of fish fed each of the diets was also carried out.

Results: Fish fed experimental diets showed significantly improved gonado-somatic index and reproductive indices over the control treatment. Higher gonado-somatic index and reproductive indices were recorded for the fish fed diet of 20 g/kg P. amygdalus dulcis seed powder compared to other experimental diets.

Conclusion: The results indicated that supplementing diets with P. amygdalus dulcis seed powder enhanced growth and improved gonadosomatic index, and reproductive indices of male C. gariepinus broodstocks which can be exploited in fish seeds production.

Open Access Original Research Article

Plankton Composition in Relation to Water Quality in the Coastal Waters of Nigeria

A. O. Ajibare, P. O. Ayeku, J. O. Akinola, A. H. Adewale

Asian Journal of Fisheries and Aquatic Research, Page 1-9
DOI: 10.9734/ajfar/2019/v5i230070

Coastal waters of Ondo State, Nigeria have diverse assemblage of fish, yet there is dearth of information on its plankton composition. This study investigates plankton components in relation to physicochemical characteristics of the coastal waters bordering Olotu, Ayetoro and Bijimi in providing baseline information that can be used for planning and implementation of policies for monitoring, impacts assessment and conservation. Surface water samples were collected on monthly basis from March to June 2015 to analyze physicochemical parameters while plankton net of 55μm mesh size was used for collection of plankton using standard methods prescribed by APHA. The light and dark bottle method was used to determine primary productivity. Shannon-wiener, Margalef and Equitability Indices were used for diversity. Values of the physicochemical parameters observed ranged as follows: temperature, 27.47±2.06-29.27±0.31ºC; turbidity, 43.43±0.91-65.33±2.52NTU; pH, 5.54±0.31-6.12±0.30; BOD, 2.20±0.29-5.43±0.54 mg/l; COD, 6.08±2.71-6.66±1.52 mg/l; dissolved oxygen, 6.39±0.39-7.78±0.19 mg/l and salinity, 2.03±0.06-3.77±0.04 mg/l. Fifteen species of phytoplankton and three developmental stages of zooplankton were recorded. Phytoplankton accounted for 83.3% as against 16.7% zooplankton. Diatoms (93.3%) and dinoflagellates (6.7%) represented phytoplankton whereas 66.7% of zooplankton belonged to the phylum Arthropoda. Primary productivity ranged between 132.194±13.48m-3hr-1 and 134.48±15.27m-3hr-1. Some dominant species recorded were Coscinodiscus, Biddulphia, Copepod, Skeletonema and Ditylum. pH and Temperature were major determinant of the composition, diversity and abundance of plankton. The observed plankton group indicates the suitability of the creeks as habitat and breeding ground for diverse aquatic species. The water quality falls within acceptable range hence the environment can be classified as healthy ecosystem.

Open Access Original Research Article

Growth of Juvenile Striped Catfish (Pangasius hypophthalmus) and Water Quality in Aquaponics System

Yuli Andriani, Zahidah ., Yayat Dhahiyat, Herman Hamdani, Ujang Subhan

Asian Journal of Fisheries and Aquatic Research, Page 1-7
DOI: 10.9734/ajfar/2019/v5i230071

This study aims to determine the growth of striped catfish (Pangasius hypophthalmus) in aquaponic systems in different plants. The study was conducted at the Laboratory of Aquaculture, Ciparanje, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran from June to July 2017. The method used in this study was the experimental method using Completely Randomized Design (CRD) with 3 treatments and 4 times replication. Treatment A: Biofilter by treatment of water spinach plants, Treatment B: Biofilter by treatment of lettuce plants, Treatment C: Biofilter by treatment of scallions plants, and Treatment D: Control (unfiltered). The measured parameters in this study were fish growth and water quality which includes level of nitrate, ammonia and phosphate in the water. The results showed that the highest fish specific growth rate in treatment A 0.0395±0.0039% with a survival rate of 93.125±13.75% followed by treatments B and C, while the water quality parameters including nitrate, ammonia and phosphate concentrations ranged from 0.042 -1,806 mg / l; 0.003-0.084 mg / l; 0.036-2,342 mg / l.

Open Access Original Research Article

Spatial Distribution of Plankton in Cikeruh River, Jatinangor District, West Java Province, Indonesia

Fillia Utami, Zahidah Hasan, Achmad Rizal, Heti Herawati

Asian Journal of Fisheries and Aquatic Research, Page 1-9
DOI: 10.9734/ajfar/2019/v5i230072

Cikeruh River is a Citarum tributary that has received a lot of waste inputs, so that will affect the quality of river water and cause differences in aquatic fertility. Aquatic fertility can be determined by calculating plankton abundance and distribution. The purpose of this study was to map the spatial distribution of plankton along the Cikeruh River. The study was conducted in June 2019 to August 2019  at five stations with the purposive sampling method. The parameters observed were physical and chemical parameters of waters, plankton abundance, diversity index, dominance index, species deficit, and Morisita index. The results showed that plankton was identified as many as 33 phytoplankton genera and six zooplankton genera, the spatial distribution of plankton in the Cikeruh River was different at each station, at station 1 consisted of 14 phytoplankton genera, station 2 27 phytoplankton genera, station 3  24 phytoplankton genera, station 4 25 phytoplankton genera, and at station 5 was  found 22 phytoplankton  genera. The abundance of plankton obtained ranges from 1823-5972 ind/L. Phytoplankton diversity index obtained from ranges 0.71-0.84, while the zooplankton ranges 0.17-0.32 with  phytoplankton dominance index 0.16-0.35 and zooplankton 0.68-0.83. Phytoplankton morisita index obtained from ranges 1.37-2.17, while the zooplankton ranges 1.03-2.31. Physical-chemical parameters observed as follows: Temperature 18.58ºC – 27.77ºC, light transparency 16,68 cm -31.92 cm, current 0.17 m/s -0.35 m/s, DO 3.35-8.05 mg/L, CO2 8.36 -37.05 mg/L, pH 7.53 – 8.66, BOD5 10.83 - 25.42 mg/L, Nitrate 0.18-0.26 mg/L,  phosphate 0.18-0.26. The physical and chemical parameters qualify for Indonesian  Government  Regulation  No. 82  of  2001  class II and III.

Open Access Original Research Article

Characterization of Beach Seine Operations in Pangandaran Beach, Indonesia

M. Firman Alfauzi, Herman Hamdani, Lantun Paraditha Dewanti, Izza Mahdiana

Asian Journal of Fisheries and Aquatic Research, Page 1-7
DOI: 10.9734/ajfar/2019/v5i230073

The coastal area in Pangandaran Regency, in general, has been developed as an area for tourism conservation and fisheries activities. Pangandaran beach which facing the oceans has potential in the fisheries sector which is quite potential so that Pangandaran regency is one of the regions in Indonesia that has potential in capture fisheries. There are various types of fishing gear used in fishing activities in Pangandaran, one of them is beach seine. Beach seine is local wisdom that is still maintained in Pangandaran so that this fishing gear is still operated. The purpose of this research is to investigate the operation of beach seine in Pangandaran water. The research was carried out in August 2018 on the East Coast of Pangandaran. The method used in this research is a survey method and analyzed descriptively. The beach seine operation phase is divided into three stages, preparation, stocking nets, and catching catches. The main catches of beach seine in Pangandaran consist of hairtail fish (Trichiurus spp) with an average of 172 fish and white pomfret (Pampus argentus) with an average of 99 fish. The bycatch is 7 species of fish with a total average of 1990 fish. The beach seine in Pangandaran has an average catch rate of 31.05 km/hour.