International Aquatic Research

http://link.springer.com/journal/40071

List of Papers (Total 170)

Effects of polyunsaturated fatty acids (PUFAs) on gonadal maturation and spawning of striped gourami, Colisa fasciatus

The present study was undertaken to determine the effects of polyunsaturated fatty acids (PUFAs) on histomorphological structure of liver, developmental stages of ovary, serum calcium (Ca2+) level, sperm quality and spontaneous spawning performance of striped gourami, Colisa fasciatus. Fishes were collected from the Brahmaputra River, Mymensingh, Bangladesh. Treated group was fed...

Effect of stocking density on the expression of glucose transporter protein 1 and other physiological factors in the Lake Victoria Nile tilapia, Oreochromis niloticus (L.)

Fish farmers have a tendency of employing high stocking density (HSD) as a means of increasing productivity. However, HSD is a chronic stressor that is likely to lower profitability of fish farming if not implemented properly. HSD induces stress which in turn elevates sequentially the levels of plasma cortisol and glucose. The resultant glucose is distributed to various tissues...

Growth performance and thyroid hormones of Caspian kutum, Rutilus frissi, juveniles in response to dietary carbohydrate levels

The aim of this study was to evaluate the effects of a practical diet containing different carbohydrate levels on growth rate, feed utilization, and thyroid hormones (T3 and T4) of Caspian kutum fingerlings. Fish with an initial average weight of 0.8 ± 0.2 g were fed five formulated isonitrogenous and isoenergetic diets with different carbohydrate levels of 15, 20, 25, 30 and 35...

Description of a daily fishing activity from a small-scale fisherman in Central Greece (Korinthiakos Gulf)

High-frequency onboard monitoring of a fully dependent small-scale fisher operating in Korinthiakos Gulf during 2008–2009 (for 262 out of 418 fishing days) was taken place. The average annual daily landings and economic revenue were 4.9 kg (SD = 2.6) and 55.7 € (SD = 33.8), respectively. Multivariate analyses applied on either species landings composition or economic revenue...

Molecular diversity of coral reef-associated zoanthids off Qeshm Island, northern Persian Gulf

The Persian Gulf, a semi-enclosed sea in the subtropical northwest of the Indian Ocean, is noted for its unique biodiversity under its extreme ecological conditions. Despite high biodiversity levels, many groups of marine invertebrates in this area have remained uninvestigated. The order Zoantharia (zoanthids) is one of these taxonomically neglected groups. In this study...

Identification of candidate reference genes for quantitative expression analysis by real-time PCR for hypoxic stress in Indian catfish, Clarias batrachus (Linnaeus, 1758)

The selection of most appropriate reference gene(s) is a crucial step in studies quantifying gene expression by quantitative real-time PCR (qPCR). As a need reference gene(s) should be unaffected at transcription level by experimental conditions and/or tissue types. In this study, 11 candidate reference genes were tested in Clarias batrachus for their expression stability using...

Optimization of gelatinolytic enzyme production by B. amyloliquefaciens sp. H11 through Plackett–Burman design and response surface methodology

Bacillus amyloliquefaciens H11 has been proven as a potential producer of extracellular protease with capacity of hydrolyzing gelatin. Therefore, the cultivation conditions for the enhanced production of gelatinolytic enzyme from a newly isolated B. amyloliquefaciens H11 was investigated using Plackett–Burman design and response surface methodology. Three significant variables...

A comparison of diurnal dynamics of water quality parameters in Nile tilapia (Oreochromis niloticus, Linnaeus, 1758) monoculture and polyculture with African sharp tooth catfish (Clarias gariepinus, Burchell, 1822) in earthen ponds

The overall performance of an aquaculture system is partly determined by its water quality parameters. Poor water quality stresses and adversely affects fish growth causing low production, profit and product quality. Diurnal dynamics of water quality parameters were investigated in Nile tilapia (Oreochromis niloticus) monoculture and polyculture with Clarias gariepinus in earthen...

Protein concentration and enzyme activities of fresh and frozen–thawed Persian sturgeon, Acipenser persicus (Borodin, 1897) semen

The membrane integrity of fish spermatozoa can be compromised after exposure to a freeze–thaw cycle, resulting in leakage of proteins in the seminal fluid. In the present work, the total protein concentration (TP) and enzyme activities of acid phosphatase (AcP), lactate dehydrogenase (LDH), arylsulfatase (AS), β-N-acetylglucosaminidase (β-N-AGase) were measured in seminal plasma...

Use of Seaweed (Sargassum tenerrimum) extract as gel enhancer for lesser sardine (Sardinella brachiosoma) surimi

Surimi is a Japanese word for washed fish mince which can be used as a raw material for the preparation of various analogue products like shrimp, lobster, crab analogue, etc. which have a very good demand in the international market. Most of the lean fishes in tropical environment have good gel-forming ability, compared with fatty fishes but due to overexploitation of lean fishes...

Protective effect of dietary vitamin E against fungicide copperoxychloride stress on Nile tilapia, Oreochromis niloticus (L.) fingerlings

A 2 × 3 factorial experiment was designed to study the effect of sublethal toxicity of technical grade copperoxychloride, dietary vitamin E and their interactions on growth performance, some blood parameters, DNA fragmentation and histopathological lesions of Nile tilapia (Oreochromis niloticus). The 96 h LC50 of copperoxychloride was found to be 129.21 mg/l. Four hundred and...

Oxygen consumption in trilobite larvae of the mangrove horseshoe crab (Carcinoscorpius rotundicauda; Latreille, 1802): effect of temperature, salinity, pH, and light–dark cycle

Carcinoscorpius rotundicauda is one of the four extant species of horseshoe crab, occurring only in Asia: around India, Indonesia, Malaysia, Philippines, Singapore, Thailand and Hong Kong. Virtually nothing is known about the physiology of this Asian species. In the present study, the respiratory physiology in terms of oxygen consumption rate of the trilobite larvae of C...

Evaluation of microalgal and formulated diets for the culture of the New Zealand pipi clam Paphiesaustralis

A set of feeding trials was carried out for different microalgal species and processed diets for the culture of the New Zealand pipi, Paphiesaustralis. Five microalgal species (Isochrysisgalbana clone T-ISO, Pavlovalutheri, Tetraselmissuecica, Chaetocerosmuelleri, and Thalassiosirapseudonana clone 3H) and three formulated diets (baker’s yeast, wheat flour, and corn flour) were...

Antioxidative activity of melanin-free ink from splendid squid (Loligo formosana)

Splendid squid (Loligo formosana) is the species available in Thailand and used for local consumption and export. The squid ink is discarded as by-product which can be used as a source of active compounds. Therefore, the aim of this study was to investigate the antioxidant activity of squid ink after melanin removal. The antioxidative activities of melanin-free ink (MFI) from...

Changes in growth and biochemical status of common carp, Cyprinus carpio L. exposed to water-born zinc toxicity for different periods

The present study was carried out to investigate the effect of sublethal zinc (Zn) concentrations on the growth, biochemical variables, and Zn residues in common carp, Cyprinus carpio L.. Fish (18.1 – 19.1 g) were exposed to 0.0 (control), 5.0 and 10.0 mg Zn/L for 7, 14, 28, and 56 days. At each time interval and each treatment, fish were collected, weighed and sampled to measure...

Isolation and partial characterization of a L-rhamnose-binding lectin from the globiferous pedicellariae of the toxopneustid sea urchin, Toxopneustes pileolus

A novel lectin from the large globiferous pedicellariae of the toxopneustid sea urchin, Toxopneustes pileolus, was isolated by a combination of gel permeation chromatography and affinity chromatography techniques. On an SDS-PAGE gel, single bands were detected with relative molecular weights of 28 and 170 kDa in the presence and absence of 2-mercaptoethanol, respectively...

Characterization of Vibrio parahaemolyticus isolated from farmed sea bass (Dicentrarchus labrax) during disease outbreaks

Vibrio parahaemolyticus was isolated from the internal organs of diseased sea bass (Dicentrarchus labrax) cultured in a marine cage farm and an inshore fish farm in the summer 2010. All strains isolated from diseased sea bass were tested for virulence by intraperitoneal injection. The isolates (n = 6) were pathogenic for sea bass. Only bacterial strains showing haemolytic...

Effect of different salts on dewatering and properties of yellowtail barracuda surimi

Washing is an important process for surimi production, in which undesirable components in fish mince are removed, while myofibrillar proteins are concentrated. However, dewatering is less effective for some fish species. The use of appropriate salt can be a means to increase dewatering and simultaneously improve the gelling property of surimi. The impact of 0.45% NaCl containing...

Oxidative stability of shrimp oil-in-water emulsions as affected by antioxidant incorporation

Shrimp oil is one of the important sources of n-3 fatty acids, which have been known for health benefit. The incorporation of shrimp oil into food emulsion has gained increasing interest. Since shrimp oil is rich in unsaturated fatty acids, it is susceptible to oxidation, leading to development of off-odor and loss in nutritive value. Thus, this study aimed to investigate the...

The presence of microcystins in fish Cyprinus carpio tissues: a histopathological study

The occurrence of heavy cyanobacterial blooms has become a worldwide problem, as a consequence of eutrophication of the aquatic ecosystems; furthermore, 60% to 75% of these blooms have been found to be toxic. Microcystins (MCYSTs), the predominant toxins of cyanobacterial blooms, are associated with mortality and illness in both animals and humans. Laboratory-controlled...

Effects of lead on the plasma electrolytes of a freshwater fish, Heteropneustes fossilis

The freshwater catfish, Heteropneustes fossilis, was subjected to 657.6 mg/L (0.8 of 96 h LC50) and 164.4 mg/L (0.2 of 96 h LC50) of lead nitrate for short-term and long-term experiment, respectively. Blood from fish was collected on 24, 48, 72 and 96 h in short term and after 7, 14, 21, and 28 days in long-term experiment. Plasma calcium and phosphate levels were determined at...

Mycobiota and mycotoxins present in finished fish feeds from farms in the Rio de Janeiro State, Brazil

The aim of the present study was to determine species of the fungal genera Aspergillus, Fusarium, and Penicillium and fumonisin B1 (FB1), aflatoxin B1 (AFB1), and ochratoxin A (OTA) contamination from feed intended for fish farms. A total of 60 samples were sampled from tilapia farms in the Rio de Janeiro State, Brazil. The quantitative enumeration of fungi as colony-forming...

Age-related NADH oxidase (arNOX) activity is significantly reduced in coelomic fluid of long-lived sea urchins

Age-related NADH oxidase (arNOX) is a cell surface protein shed into the circulation and other body fluids, which generates superoxide. The activity increases with age in human tissues and body fluids (serum, saliva, and perspiration) and is a potential source of age-related oxidative damage. We measured arNOX activity in the coelomic fluid of sea urchin species with different...

Effect of pre-cooking times on enzymes, properties, and melanosis of Pacific white shrimp during refrigerated storage

Pre-cooked shrimp have gained interest due to their attractive color and flavor. However, shrimp without sufficient pre-cooking have faced melanosis, particularly during the extended storage. This leads to the rejection by consumers and the market. Therefore, pre-cooking with appropriate time would be a means to tackle such a problem. The objective of this study was to...

Alterations in histopathological features and brain acetylcholinesterase activity in stinging catfish Heteropneustes fossilis exposed to polluted river water

Responses of stinging catfish (Heteropneustes fossilis) to pollution were studied in three freshwater rivers, namely Buriganga, Turag, and Shitalakkhya (Dhaka, Bangladesh), which are potentially affected by anthropogenic pollution originating from industrial and sewage dumping. Partial parameters about water quality (temperature, dissolved oxygen, and pH) and seasonal plankton...