HATASO Journal Management System

Volume 12,Issue 2021, 2021

May-12-2021

Volume 12, Year 2021

Population Dynamics of Ilisha africana in Coastal Waters of Ghana

Phenotypic Variability of Sampled Clarias gariepinus (Burchell, 1822) Population from Selected Sources of Benue and Donga River, Nigeria

Phenotypic variability of sampled Clarias gariepinus (Burchell, 1822) population from Benue and Donga River, Nigeria, was assessed. Thirty matured samples of Clarias gariepinus of different sizes were bought from artisanal fisherfolk, and morphometric and meristic attributes were characterized. Phenotypic heterogeneity (coefficient of variability, CV, > 10%) and multiple modes in meristic and morphometric values were assessed to imply plasticity and taxonomic complications, respectively. Twenty morphometric and nine meristic attributes were measured in all the collected individuals to the nearest 0.01 cm, using Vernier calipers. Coefficient of variability of the Benue population varied from 8.36 in dorsal fin rays counts (DFR) to 46.33 in possession of anteriorly serrated spine on the right side (PESES-R), while that of the Donga populations varied from 6.77 in caudal fin rays count (CFR) to 61.76 in possession of anteriorly serrated spine on the left side (PESES-L). A total of 88.8% of meristic attributes of the Benue strains were heterogeneous (CV > 10%), while 29.6% of Donga strains were heterogeneous (CV > 10%). A total of 94.1% and 58.8% of morphometric attributes of Benue and Donga populations, respectively, were heterogeneous (CV > 10%). Multiple modes were recorded in both Benue and Donga populations at 58.8% and 52.9% of the attributes, respectively. Pectoral fin length of left side fin (PECFL-L) and maximum body depth (BD-MAX) were the most varied morphometric attributes in the Benue population, while caudal fin width (CFW) and pectoral spine length of left side fin (PECSL-L) were most varied in the Donga population. The Benue population had significantly higher values at head length (HL), BD-MAX, dorsal fin length (DFL), anal fin length (AFL), pre-pectoral (PPEL), and pre-pelvic (PPL), when compared with Donga population, while Donga population had significantly higher values at CFW, pre-dorsal (PDL), and pre-anal (PAL) when compared with Benue population. The studied C. gariepinus population was characterized by heterogeneity of phenotypic values, and the population can be taxonomically discriminated by meristic and morpho types.

9th International Conference on Aquaculture & Fisheries schedule on October 07-08, 2021 at Vienna, Austria

A C-Type Lectin with Antibacterial Activity in Weather Loach

Award of Aquaculture

Determinants of Climate Change Risk Management Strategies Among the Aquaculture Fish Farmers in Nigeria using Multinomial Logit Model

Fishery Resources, Conservation Challenges and Management Strategies in Ethiopia

Indigenous Fish Feed Resources in Nigeria

Litopenaeus Vannamei Feeding Activity and Development on Soybean Based Diets with Added Feeding Effectors

Macrophyte Diversity Alters Invertebrate Community and Fish Diet

Market Analysis for Fisheries in Europe 2020

Maximum Likelihood Estimation of Kokanee and Sockeye Salmon Spawners in a Stream Using Visual Survey Data, 2003-2017

Present Status and Future Direction of Bangladeshi Shrimp Resources

Probiotic Effect on Feeding Technology and their Use in Aquaculture

Save the date Aquaculture 2021 will be arriving!

Fishing Technology and Methods

Ichthyofaunal Diversity in the Varapuzha Wetlands of Vembanad Lake, Kerala, India: Comprehensive Study on the Living Status, Biodiversity Assessment and Fishing Methods

Differences in Phenotypic Characters of Nile Tilapia (Oreochromis niloticus L) in Three Ethiopian Rift Valley lakes; Screening Strains for Aquaculture

Marine Protected Areas Help Fisheries and Ocean Ecosystems

Organic Aquaculture

South Sudan Fish Processing and Value Chain Analysis of Juba City

A 6-weeks study was conducted in the domestic fish markets and at the River Nile landing sites of Juba city to determine the demand of fish products. A total of 45 fish traders and 3 focus groups (8 individuals per group) discussions were selected by means of sampling techniques. 6 other government officials from different levels of institutions and academia were interviewed using a well-structured questionnaire. Focus group discussions were provided with a well- structured guide together with the key informant interviews. Results of the study showed that, fish traders have got very low savings while running the fish businesses in Juba, Kator and Munuki Payams of Juba city. Respondents in the study area mentioned poor transport networks and marketing structures, multiple levies and taxes imposed on the fish traders, high transport cost, high rental fees for the business premises in the fish markets, limited and poor storage facilities and the lack of credits from the financial institutions to the fish traders’ associations and individuals were the major challenges confronting the domestic fish marketing in Juba city. The experiences of the fish traders in fisheries business ranged from 2-5 years old and the motivations of the fish traders in joining fisheries business was the source of income generation activities and employment. Fish traders’ income generated from fisheries business not sufficient enough to cover their monthly expenses. Boats, small- sized trucks and motorbikes were the main transportation system for fish products from the production areas to Juba city. Fish traders used ice, sisal sacks, wooden boxes, woven baskets, plastic buckets on boats, defreezers, wooden tables, carpets and concrete slaps to handle their fish products during the transportation and selling processes at the fish markets. Marketing structures observed to be dominated by traditionally made systems causing high fish spoilage and loses. Majority of the fish traders were not members to any business associations or cooperatives. Few fish traders mostly women were members to Konyokonyo Women SACCO and the fish traders from Uganda were members in their country of origin. There is no fisheries policy framework to regulate domestic fish marketing in Juba city. Central Equatoria State Ministry of Animal Resources and Fisheries has a Fishery draft bill laying before Central Equatoria Revitalarised Legislative Assembly for readings and amendment. Long term planning by the government and partners for the development of fisheries sector with a focus on fish marketing structures and the landing sites to strengthened fish value chain in Juba city is required.

Microsatellite Techniques in Guam’s Specific-Pathogen-Free Penaeus vannamei Stock: Genetic Variance and Parentage Identification

Design Characteristics and Specifications of Cast Net Operated Along the Lower Stretches of Vembanad Wetlands

Tropical Aquaculture

Insights of Recreational (Sport) Fishing

A Note on Catfish Farming

Advances in Marine Farming: A Commentary

Effect of Season on the Concentration of Nutrients in the Three Highland Lakes of Ethiopia

Water resource contamination is still a major concern in several regions of developing countries especially in sub-Saharan countries in which polluted waters pose serious risks to human health and the environment. The research was aimed to evaluate the current water quality status of highland Lakes (Ardibo, Logo and Tana) of Ethiopia in different season and to identify potential pollution sources sites. Physico-chemical water quality parameters have been determined by taking duplicate samples from three sampling sites of each lake and the results were compared with WHO and FAO standards. The result of the study indicates nutrients concentration to be Alkalinity (428, 269.945, 109.935 mg/L), calcium (31.542, 46.873, 77.12 mg/L), chloride (89.165, 77.5, 40.125 mg/L), magnesium (94. 755, 93.165, 39.396 mg/L), NH3 (0.418, 0.184, 0.6493 mg/L), NH4 (0.433,0.145, 0.753 mg/L), potassium (1.299,19.325, 6.547 mg/L), sodium (22.489,39.5, 10.671 mg/L) and sulphate (2, 2.075, 1.479 mg/L) in Lake Logo, Ardibo and Tana, respectively. The concentration of Calcium and NH4 were significantly more abundant in rainy season than dry season (p<0.01) and the concentration of Chloride, magnesium, Potassium, Sodium and Sulphate were significantly more abundant in dry season than rainy season in lake Ardibo (p<0.01). The concentration of NH4 were significantly more abundant in rainy season than dry season and the concentration of magnesium were significantly more abundant in dry season than rainy season in lake Tana (p<0.01) and also the concentration of alkalinity, magnesium, and sulphate were significantly more abundant in dry season than rainy season in Lake Logo and the concentration of NH3 and Potassium were significantly more abundant in rainy season than dry season (p<0.01). The concentration of NH3 and NH4 were 0.6088 mg/l, 0.679 mg/l in rainy season and 0.6897 mg/l, 0.8083 mg/l in dry season respectively in Lake Tana. As the result shown that the concentration is higher in rainy season and the main reason for these results were the storm water and sediment load from different catchment of the lake released in the form of run off and soil erosion. The farmers use fertilizer to increase their crop production since NH4 and NH3 are directly released in to the lake in the form of runoff hence the concentration of these nutrients increase in rainy season.

In-season Forecast of Chum Salmon Return Using Smoothing Spline

Market Influences and Apparatus to Examine Fisheries

Major Constraints in Coastal Mariculture

Population Genetics in Conservation and Aquaculture

Transportation of Live Fish Seed

A Commentary on Population Genetics of Hatchery and Wild Fish

Freshwater Angelfish Pterophyllum scalare (Lichtenstein; Pisces: Cichlidae) Phenotypic Plasticity during Fasting Periods

The Impact of Acclimation on the Swimming Behavior of Salmonids (Oncorhynchus mykiss and Salmo salar)

Marine Ecology and Production Process

A Commentary on Ponds Harvesting Techniques

An Editorial Note on Aquatic Ecosystem

Outlining the Offshore Marine Environment and Mammal Habitation with the Changing Climate in the Gulf of Guinea: The Case of Ghana’s Waters

A Commentary on Tuna Fish Farming

Role of Bio Toxins in Marine Life

A Note on Fish Disease and Parasites

A Note on Marine Biology

Dietary shifts in Juvenile and Adult Nile Tilapia, Oreochromis Niloticus (L.) (Pisces: Cichlidae) in Lake Ziway, Ethiopia