International Journal of Innovative Studies in Aquatic Biology and Fisheries最新文献_第4页

Variations in Enzyme Activities in Two Sizes of Tilapia guineensis Exposed to Paraquat Dichloride in the Laboratory 实验室中暴露于二氯百草枯的两种大小的几内亚罗非鱼酶活性的变化

International Journal of Innovative Studies in Aquatic Biology and Fisheries Pub Date : 1900-01-01 DOI: 10.20431/2454-7670.0701005

Ukazu, Chidume

{"title":"Variations in Enzyme Activities in Two Sizes of Tilapia guineensis Exposed to Paraquat Dichloride in the Laboratory","authors":"Ukazu, Chidume","doi":"10.20431/2454-7670.0701005","DOIUrl":"https://doi.org/10.20431/2454-7670.0701005","url":null,"abstract":"Aquatic pollution is one of the major worldwide environmental issues affecting humanity in recent years [1]. Consequent of industrialization and haphazard urbanization that is prevalent in major cities in the country, many rivers are experiencing convoluted challenges of pollution [2,3]. These have resulted in alarming levels of contamination and environmental degradation, particularly of the aquatic environment [4]. Enzymes play an important role in food utilization and metabolism in a living organism [5]. But this system may get altered under the stress and influence of toxicants [6]. This is because cells in organisms contain enzymes which perform different functions [7]. Conversely, when the integrity of the cell is disrupted through external interference by toxicants, enzymes escape into the plasma in the blood stream where their activities can be measured as a useful tool of cell integrity [8]. The response of aquatic organisms to pollution is expressed through several key biochemical activities involving enzymes which are concerned with the biotransformation system and these biomarkers give early warning signs of aquatic pollution [9].","PeriodicalId":212275,"journal":{"name":"International Journal of Innovative Studies in Aquatic Biology and Fisheries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131933495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vertically-Suspended Environmental Enrichment Structures Improve the Growth of Juvenile Landlocked Fall Chinook Salmon 垂直悬浮环境富集结构促进内陆秋季奇努克鲑鱼幼鱼的生长

International Journal of Innovative Studies in Aquatic Biology and Fisheries Pub Date : 1900-01-01 DOI: 10.20431/2454-7670.0501004

Alex J. Rosburg, Brian Fletcher, M. E. Barnes, Cody E. Treft, Blaise R. Bursell

{"title":"Vertically-Suspended Environmental Enrichment Structures Improve the Growth of Juvenile Landlocked Fall Chinook Salmon","authors":"Alex J. Rosburg, Brian Fletcher, M. E. Barnes, Cody E. Treft, Blaise R. Bursell","doi":"10.20431/2454-7670.0501004","DOIUrl":"https://doi.org/10.20431/2454-7670.0501004","url":null,"abstract":"Environmental enrichment is the addition of structures or materials to create a more natural or complex environment in otherwise stimuli-deprived hatchery rearing units. It has been used in an attempt to improve post-stocking survival (Berejikian et al. 1999; Fast et al. 2008), but some forms of enrichment have also shown the potential to improve foraging efficiency, reduce fin damage, and promote greater social dominance in hatchery-produced fish (Bosakowski and Wagner 1995; Berejikian et al. 2001; Rodewald et al. 2011). Structural additives meant to imitate natural environments, including sand and gravel substrates, stones, woody debris, and live prey have been common methods of enriching rearing tanks and raceways (Brown et al. 2003; Brockmark et al. 2007). However, the use of natural substrates and structures can impede circular tank hydraulic selfcleaning, increasing the time required to perform routine culture activities and also creating conditions favorable to pathogenic bacteria (Baynes and Howell 1993; Tuckey and Smith 2001; Krebs et al. 2017).","PeriodicalId":212275,"journal":{"name":"International Journal of Innovative Studies in Aquatic Biology and Fisheries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125033118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Changes in Metabolites of African Catfish (Clarias Gariepinus) Exposed to Different Salinity Levels 非洲鲶鱼(Clarias Gariepinus)在不同盐度下代谢产物的变化

International Journal of Innovative Studies in Aquatic Biology and Fisheries Pub Date : 1900-01-01 DOI: 10.20431/2454-7670.0504001

Alalibo, Gabriel, A. AkinrotimiO.

{"title":"Changes in Metabolites of African Catfish (Clarias Gariepinus) Exposed to Different Salinity Levels","authors":"Alalibo, Gabriel, A. AkinrotimiO.","doi":"10.20431/2454-7670.0504001","DOIUrl":"https://doi.org/10.20431/2454-7670.0504001","url":null,"abstract":"Salinity refers to the degree of saltiness of a water body. It has been described as one of the important factors exerting selective effectson aquatic organisms. Salinity is defined as a measure of the amount of dissolved salts in the water [1]. Salinity is the correct chemical term for the sum concentration of all ionic constituents dissolved in inland waters, both fresh and saline. Habitat salinity represents a major abiotic factor that governs the activity and distribution of fishes and other aquatic animals. Furthermore, aquatic animals can either be stenohaline or euryhaline, which shows the level of osmotic tolerance of the organism. Stenohaline species such as the African catfish, can only withstand little ranges of salinity. While euryhaline species like the sea bass and some tilapias are able to tolerate a wide range of salinity, which enables them to move between freshwater and salt water and it is leading to many diverse adaptation strategies for different species to survive in different osmotic pressure regimes [2]. Because the autonomous osmoregulation in aquatic organisms is an energy demanding process, certain prevailing salinities might help to optimize growth or reproduction by decreasing osmoregulatory energy expenditure [3].The metabolic cost would be expected to be minimized during culture of fish in isotonic conditions, thus it can minimize the cannibalistic behavior of fishes, and indirectly improve the survival and growth performance of the African catfish [4].","PeriodicalId":212275,"journal":{"name":"International Journal of Innovative Studies in Aquatic Biology and Fisheries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115162036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Dietary Probiotics on Growth, Survival and Stress Resistance of Rainbow Trout (Onchorynchus Mykiss Walbaum) 饲料中添加益生菌对虹鳟鱼生长、存活及抗逆性的影响

International Journal of Innovative Studies in Aquatic Biology and Fisheries Pub Date : 1900-01-01 DOI: 10.20431/2454-7670.0502001

P. Pantazis, Georgia Kouneli, M. Kolygas, John Ch. Karamaligas, F. Athanassopoulou

{"title":"The Effect of Dietary Probiotics on Growth, Survival and Stress Resistance of Rainbow Trout (Onchorynchus Mykiss Walbaum)","authors":"P. Pantazis, Georgia Kouneli, M. Kolygas, John Ch. Karamaligas, F. Athanassopoulou","doi":"10.20431/2454-7670.0502001","DOIUrl":"https://doi.org/10.20431/2454-7670.0502001","url":null,"abstract":": Hundred fifty rainbow trout of an average weight of 108  6.79g have been kept for sixty days in 700L tanks and various temperature regimes. They were fed two different diets, the one with probiotics containing Pediococcus acidilactici (CNCM MA 18/5M) and the other one without probiotics. All groups gained weight, however observed growth rate and weight gain have been considerably lower when fish over passed the 200g size class. No significant differences were shown between the two groups kept in lower temperatures in terms of growth rate, weight gain, feed conversion and protein utilization. Trout kept in natural temperature conditions fed either with probiotics or without probiotics, did not differ dramatically in between them in terms of growth rate and weight gain. However the ones fed with probiotics have experienced better feed conversion and protein utilization. Fish which have received dietary probiotics had lower serum cortisol levels and better Na+ and Cl- serum equilibrium than those which have not received probiotics, indicating that probiotics increased the stress resistance of experimental fish, even after the oxygen depletion test. Results of this study confirm that P. acidilactici in rainbow trout enhances its welfare and disease resistance and therefore should be used even at high size classes (100","PeriodicalId":212275,"journal":{"name":"International Journal of Innovative Studies in Aquatic Biology and Fisheries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133311181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0