Asian Journal of Fisheries and Aquatic Research

Correlation of Water Quality Parameters on Growth Performance of Seaweed (Kappaphycus alvarezii Doty, 1986) Cultivated with Diagonal Method

2024-04-04T12:34:39+00:00

Kappaphycus alvarezii seaweed is an exported commodity that has economic value and is a leading commodity in aquaculture. The present study aims to analyze the correlation between water quality parameters and the growth of Kappaphycus alvarezii seaweed using the diagonal method. A completely randomized design using three treatments and four replications was applied for the experimental design. The research was carried out from May to June 2023 in the waters of Angkue Village, Bone Regency, Indonesia. Treatment in this diagonal model was based on the length of the diagonal rope, namely 2.5 m (treatment 1), 3.5 m (treatment 2), and 4.5 m (treatment 3) of the water depth and seaweed maintained for 42 days at a water depth of five meters. The results showed that the absolute growth of seaweed was 17,537.0 g during the study, with an average of 5845.67 ± 359.34 g. In treatment 1, the absolute growth was 1368.55 ± 5.29 g; in treatment 2, it was 1467.83 ± 4.58 g; and in treatment 3, it was 1547.88 ± 1.24 g, with the highest growth rate and the lowest growth rate in the first week. Water quality parameters all contribute positively to seaweed growth, but those that contribute most strongly to seaweed growth are brightness, phosphate, nitrate, and salinity.

Dietary Supplementation of Chromium Picolinate does not affect Growth Performance and Feed Conversion Ratio of Rainbow Trout (Oncorhynchus mykiss)

2024-04-06T13:00:05+00:00

Aims: A growth experiment was conducted to explore the impact of dietary chromium on the growth performance and feed conversion ratio of rainbow trout (Oncorhynchus mykiss).

Study Design: Original Research Article

Place and Duration of Study: Fisheries Research Station (FRS), Trishuli Nepal, between November 1 to January 29, 2023.

Methodology: A total of 270 healthy and equal sized- O. mykiss (initial weight: 27g) were fed on a non-supplemented basal diet (Cr-Pic0), or a basal diet supplemented with 0.4g/kg Cr-Pic (Cr-Pic0.4), or a basal diet supplemented with 1.2g/kg Cr-Pic (Cr-Pic1.2) for 90 days. Each diet was randomly assigned to three replicate groups of 30 fish per flowthrough raceway tanks for 90 days and fed to apparent satiation twice daily.

Results: Upon conclusion of the feeding trial, the results showed no significant differences in final weight, weight gain, specific growth rate, or condition factor among treatments (P>0.05). There were also no significant differences in the survival rate and feed conversion ratio of the rainbow trout fed various experimental diets (P>0.05).

Conclusion: The results suggest that growth performance, food conversion, and survival of rainbow trout fingerlings are not affected by 0.4 or 1.2 mg/kg supplementation of Cr-Pic in diet.

Evaluation of the Impact of Feed Types on Reproductive Performance and Growth of Clarias gariepinus under different Culture Systems

2024-04-12T12:56:03+00:00

The study evaluated the impact of farm-made and commercial feed types on reproductive performance and growth of Clarias gariepinus under different culture systems (tarpaulin, concrete, metal and earthen pond). The research was conducted for 56 weeks in a newly constructed 1m³ (4ft by 4ft by 4ft) stocked with 20 juveniles each and it was established that fecundity was significantly different (P<0.05), with the highest value (320,366.67 ± 14359.01eggs) obtained in fish fed Commercial feed C in Concrete tank C and the lowest value in the Earthen pond fed farm-made feed (153,533.33 ± 6053.1900 eggs). The results obtained in this study showed fertilisation was significantly different, with the highest value in Metal tank B fed Commercial feed B (83.52 ± 0.76 %), whereas earthen pond A fed farm-made feed recorded the lowest value (63.73 ± 2.27 %). The growth rate showed that the Highest mean weight gain of 3824.23±373.69 was recorded in Con B and the lowest of 2035.57±252.04 in Tarp A. The highest specific growth rate of 2.85±0.19 was in fish fed commercial feed C in Meta tank C and the lowest of 2.45±0.11 in fish fed farm-made feed in Tarp A. Growth parameters including length gain (cm), weight gain (g), specific growth rate (%/day), and percentage weight gain (%), were significantly better (P<0.05) in fish fed commercial feed B in the concrete tank although fish fed farm made feed and commercial feed A in other tanks showed some impressive competition. Therefore, feeding fish with commercial feed C in concrete pond C and metal tank B with Commercial feed B is recommended for better reproductive performance while the use of commercial feed B in Concrete pond is recommended for fish growth although fish fed farm-made feed and commercial feed A in other tanks showed some impressive competition.

Studies on Seasonal Variation of Zooplankton Population in Elanthakulam, Palayamkottai, Tirunelveli District, India

2024-04-15T08:09:08+00:00

A study of the zooplankton population in Elanthakulam pond, Tirunelveli District, and the plankton samples were collected during the winter season (August 2017–October 2017). Seasonal changes in the pattern of the zooplankton population have been driven by a combination of abiotic and biotic factors. Hence, the present study was undertaken to assess the zooplankton population in the Elanthakulam pond. The results indicate that 10 species belonging to four genera were recorded during the period of study. Out of 10 species, 4 belonged to rotifers, 3 belonged to caldoserans, 2 belonged to copepods, and one species belonged to Ostracoda. The present study concludes that zooplankton were not at their maximum in the monsoon season because of unfavourable environmental conditions, and they also slightly declined in August and September and increased again in October.

Comparative Study on Current Fishing Status of Paalameenmadu and Kallar Barmouths in Batticaloa District, Sri Lanka

2024-04-16T07:18:32+00:00

Batticaloa lagoon is one of the productive estuaries on the East coast of Sri Lanka and is connected to the sea at two points, Paalameenmadu and Kallar barmouths. The entire dynamics of the lagoon is based on the seasonal opening and closing of the above barmouths which influences the fish catch composition in nearby fishing areas. This study collects information on current fishing practices, species composition of the catch, and seasonal catch species composition, the level of awareness on fishing regulation and sustainable fishery using semi-structured questionnaire. Fisheries data were collected from 10 major barmouth fishery landing sites from January to April 2021. 210 respondents were selected using a stratified random sampling technique. A semi-structured questionnaire was used to collect responses after a pre-test and analysed with descriptive statistics method using SPSS. The study revealed that Paalameenmadu barmouth was opened annually and Kallar barmouth has been closed for the last five years. The most practiced crafts in Paalameenmadu are outboard Fiber Reinforced Plastic boats (OFRP) by 35.26% of fishers and small lagoon canoes by 87.04% fishers in Kallar. A total of seven types of fishing gears are used, among them hook and line, cast net, and dragnet were identified as major fishing gears operated. 30 aquatic species have been recorded in the catch, representing 17 families. Among them, dominant fish families are Scombridae 17.11% and Penaeidae 14.81% in Paalameenmadu. In the Kallar, family Penaeidae 18.75% and Gerreidae 16.32% have been recorded. Barmouth opening is favourable for fishing and 38.57% Penaeidae species were caught during barmouth opening period. Community response that Irregular and early barmouth opening have caused a reduction in fish production which impacts on economic activities. Fishermen have good awareness on importance of fishery resources sustainability and these resources need to be preserved for future generations through proper management practices.

Effects of Tiny Moss Bryum capillare Meal on Growth Parameter, Haematology, Histology and Carcass Quality of Clarias gariepinus (Burchell) Juveniles

2024-04-19T06:54:03+00:00

This research determines the effects of Tiny Moss Bryum capillare meal, on growth parameter, Haematology, Histology and Carcass Quality of Clarias gariepinus (Burchell) Juveniles. The study was conducted for fifty six (n=56) days, under a completely randomized design. Tiny Moss Bryum capillare was included in to the experiment at level of 0, 2, 3, 4, 5% The final body weight and the daily weight gain increase as the Tiny Moss (Bryum capillare) inclusion increased among the individual treatment. The results of the feed conversion ratio were significantly (p <0.05) different among the groups, such that T1 and T2 had the best FCR followed by T5 and T6 which had similar values but the T4 had the least value. The amino acid profile showed that the Glutamic Acid, Aspartic Acid,Valine, Threonine, Serine, Phenylalanine, Proline and Methionine increased in value while Lysine, Leucine, Arginine, Alanine, Isoleucine , Glycine, Histidine and Tryptophan reduced in value and there was no significant change in cysteine (%) all were significantly at (P<0.05). The haematological parameters of the catfish (Clarias gariepinus) juveniles fed graded levels of diets containing Tiny Moss (Bryum capillare) were not significantly different (P>0.05). The histological analysis of tiny Moss (Bryum capillare) feed shows normal skin architecture with well outlined epithelia cell (EC) moderate effect on the skin layer with moderate necrosis (N) of the muscular region with the epithelia lining and superficial spreading of melanoma (M) restricted to the epidermis. The heart shows normal cardiac tissue with cardiac cell (CC), cardiac fiber (CF) cardiac muscles (CM) shows moderate aggregate of myocardiac inflammation (AMI). The gill showed section of gill with ghost (G) appearance with severe aggregate of inflammatory cell (AIC). The liver cells revealed severe effect on the hepatic tissue with severe intra hepatic inflammation (IHI) and intra hepatic hemorrhage (IHIH). The damage done to these organs as the result of the feeds correlates with the concentrations of the feeds in each experimental tank.

Phytoremediation Potential of Selected Plants & Growth of Oreochromis niloticus (Linnaeus, 1758) in Aquaponic Systems

2024-04-20T10:30:49+00:00

Aquaponic systems use plants` natural ability to absorb nutrients from aquaculture wastewater. This improves water quality for fish and promotes plant growth, resulting in a sustainable and efficient food production method. However, the nutrient removal capacity of many plant species within aquaponics remains underexplored. This study investigated the potential of three plant species: sweet wormwood (Artemisia annua), pumpkin (Cucurbita pepo) and amaranth (Amaranthus dubius) for biofiltration within a media-based aquaponic system. In addition, the growth performance of plants and Nile tilapia (Oreochromis niloticus) within the system was evaluated. Artemisia annua recorded significantly higher removal rates for ammonia (52.5 ± 19.9%), nitrate (61.6 ± 9.02%), and nitrite (41.9 ± 8.7%) compared to other plant species. In contrast, C. pepo exhibited the lowest nutrient removal efficiency. Most water quality parameters, except for ammonia and dissolved oxygen, remained within the optimal range for O. niloticus growth during the experiment. Significantly higher (P˂0.05) fish growth rates (0.33 ± 0.006 g/day) were observed in A. annua than other treatments. Similarly, A. annua produced the highest plant yield (0.49 ± 0.02 kg/m²), while C. pepo yielded the least (0.29 ± 0.00 kg/m²). All the studied plants reduced aquaponic system waste, with A. annua exhibiting significantly higher biofiltration efficiency, promoting increased fish growth and plant yield. This demonstrates their potential for sustainable aquaculture through wastewater treatment and healthy fish production in media-based systems.

Analysis of Factors Influencing Fresh Fish Consumer Satisfaction at Supermarket X, Bandung Regency

2024-04-24T08:32:22+00:00

This research is entitled Analysis of Factors Influencing Fresh Fish Consumer Satisfaction in Supermarket X, Bandung Regency. The purpose of this research was to determine what factors influence consumer satisfaction with fresh fish at Supermarket X in Bandung Regency. Supermarket X is one of the largest supermarkets in Bandung Regency, which provides basic needs products such as food ingredients for cooking including the availability of fresh fish. Data was obtained through a questionnaire distributed to 104 Supermarket X customers for 1 month, from mid-April to mid-May. The type of research used is descriptive research using a quantitative approach. To determine the value of each attribute using IPA analysis (Importance Performance Analysis), The results of this research show, in calculations using IPA (Importance Performance Analysis) the consumer satisfaction factor is divided into two, namely satisfied and disssatisfied. Satisfactory attributes are product performance, reliability, durability, conformance, price affordability, price compatibility with quality, price compatibility with benefits, tangible services, reliability, responsiveness, assurance and certainty, empathy, additional costs incurred and strategic location. While the unsatisfactory attributes, namely, the affordability of prices and the superior quality of fresh fish, are still inferior to other supermarkets.

Type Abundance and Relative Abundance of Macrozoobentos in the Intertidal Zone of Marabatuan Island, Kotabaru, Indonesia

2024-04-25T09:34:43+00:00

The structure of macrozoobenthos communities plays a crucial role in aquatic ecosystems because most of them are in the second or third trophic level. Components of macrozoobenthos community structure include species and abundance, species diversity index, species uniformity index, dominance index. The research aims to analyze species abundance and relative abundance of macrozoobenthos in the intertidal zone of Marabatuan Island, Kotabaru, Indonesia. The research location is on Marabatuan Island, Pulau Sembilan District, Kotabaru Regency, South Kalimantan Province. The highest relative abundance (KR) was at station 3, namely the species Ophiocoma erinaceus, from the Asteroidea class, the second highest value was at station 2 with the species Holothuria atra and at station 1 of the same species, namely Holothuria atra from the Asteroidea. The lowest relative abundance was at station 1 of the Linckia laevigata species. The Diversity Index (H') of macrozoobenthos at all stations is in the medium criteria.