{"title":"Dietary impact of Alfalfa on growth performance, biochemical profile, and resistance against Aeromonas hydrophila in fingerlings of common carp","authors":"Basharat Ali, Yogesh Kumar Rawal, Oshin Dhillon, Chhomo Thayes, Sidharth, Gagan Mittal","doi":"10.1007/s12562-024-01757-2","DOIUrl":"https://doi.org/10.1007/s12562-024-01757-2","url":null,"abstract":"<p>The present study investigates the effects of dietary alfalfa, <i>Medicago sativa</i> leaves, on growth performance, carcass composition, enzymatic activity, biochemical indices, intestinal histomorphometry, and disease resistance in fingerlings of common carp, <i>Cyprinus carpio</i> L. A feeding trial of 60 days was carried out in which common carp fingerlings were fed on experimental diets supplemented with alfalfa extract at rates of 0.0% (T<sub>0</sub>) control, 0.25% (T<sub>1</sub>), 0.50% (T<sub>2</sub>), 0.75% (T<sub>3</sub>), and 1.0% (T<sub>4</sub>). At the end of the feeding trial, specific growth rate, protein efficiency ratio, and feed conversion ratio improved significantly (<i>P</i> < 0.05) in groups fed on diet supplemented with alfalfa in a dose-dependent manner. The blood biochemical parameters and the activity of the digestive enzymes were significantly (<i>P</i> < 0.05) elevated in the alfalfa supplemented groups in a dose-dependent manner. Additionally, T<sub>4</sub> had significantly (<i>P</i> < 0.05) more protein in fish carcasses than the control group. Intestinal histomorphometry and the relative percent survival following the challenge trial with <i>Aeromonas hydrophila</i> were also significantly (<i>P</i> < 0.05) enhanced by dietary alfalfa. The study concludes that alfalfa extract possesses antioxidant and immune-enhancing potential, which by improving growth and increasing the capacity to combat bacterial infections in fish proves beneficial for sustainable aquaculture.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"17 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139977862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Early prediction of environmental deterioration in a coastal fish farming area using lactic acid bacteria as an indicator","authors":"Erina Fujiwara-Nagata, Gentoku Nakase, Kyohei Kuroda, Takashi Narihiro, Mitsuru Eguchi","doi":"10.1007/s12562-024-01756-3","DOIUrl":"https://doi.org/10.1007/s12562-024-01756-3","url":null,"abstract":"<p>We hypothesized that lactic acid bacteria (LAB) present in sediments at aquaculture sites can be employed as an indicator for the early prediction of deterioration, as the concentration of organic acids controls hydrogen sulfide production via sulfate-reducing bacteria. We selected two aquaculture sites with different acid volatile sulfide (AVS-S) values, St. OJ (average AVS-S = 0.24 mg S/g dry mud) and St. UM (average AVS-S = 1.16 mg S/g dry mud), which were less and critically deteriorated, respectively, and examined our hypothesis by performing a 3-year-long survey in Tanabe Bay, Wakayama Prefecture, Japan. In St. UM, the bacterial community showed positive correlations with AVS-S values and water contents. With AVS-S accumulation at the site, the abundances of LAB decreased below the detection limit, suggesting that LAB viable counts may be unsuitable for predicting early deterioration at sites with severe AVS-S accumulation. In St. OJ, the LAB viable counts, organic acid content, and AVS-S values increased after the beginning of sea bream aquaculture, and the bacterial community showed high correlations with the LAB counts, succinic and total organic acid concentrations, and the abundance of the class Bacilli. These on-site experiments indicated that LAB counts can be a reasonable indicator for evaluating deterioration in aquaculture sites.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"53 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139757374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fisheries SciencePub Date : 2024-02-12DOI: 10.1007/s12562-024-01749-2
Qinglian Hou, Rong Wan, Cheng Zhou
{"title":"A radar image seabird identification method for analyzing the effects of FADs on seabirds","authors":"Qinglian Hou, Rong Wan, Cheng Zhou","doi":"10.1007/s12562-024-01749-2","DOIUrl":"https://doi.org/10.1007/s12562-024-01749-2","url":null,"abstract":"<p>In the tuna purse seine fishery, seiners spend a considerable amount of time detecting objects such as seabirds, for which radar is a very efficient method. In this study, we present a radar image seabird identification method that can calculate the number of clusters, the area of seabird clusters, and the activity level of seabird clusters. We used a fishing vessel’s radar to collect information on seabird groups within 29,632 km of the vessel and calculated a spatial clustering of the seabird-echoes. Generalized additive mixed models (GAMM) were used to investigate the relationship between drifting fish aggregating devices (FADs) and seabird dynamics in the Republic of Kiribati. The findings indicate that FAD variables affected seabird behavior. The random effects on cluster number, cluster area, and cluster ability were 3.27, 17.41, and −0.17, respectively. Then, we compared the radar image information that was calculated. The bird cluster around drifting FADs was found to be more concentrated and denser than in areas without FADs, with a lower level of activity observed. The longitude of 165°E had the highest number of bird clusters and the greatest area inhabited by birds, but these decreased to the east. However, model 3 showed that the minimum value of seabird cluster activity level occurred around 165°E and increased to the east.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"324 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139757635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Linking genetic lineages of giant freshwater prawn Macrobrachium rosenbergii to their global populations","authors":"Deepak Jose, Harikrishnan Mahadevan, Valiyaparambil Mohanan Bijoy, Madhusoodana Kurup","doi":"10.1007/s12562-024-01750-9","DOIUrl":"https://doi.org/10.1007/s12562-024-01750-9","url":null,"abstract":"<p>Globally, the giant freshwater prawn <i>Macrobrachium rosenbergii</i> is considered as a commercially important aquaculture species. Genetically, this species is differentiated into western, central and eastern populations. Molecular studies have reported population differences in <i>M. rosenbergii</i> inhabiting Indian waters and have suggested possibilities for the existence of a separate genetic stock in Vembanad Lake (Kerala, S. India). This study was carried out to address this question regarding the lineages of <i>M. rosenbergii</i> inhabiting this lake. Since the lake is divided into ‘downstream’ and ‘upstream’ parts, <i>M. rosenbergii</i> samples were collected from both these regions, and <i>COI</i> sequences were developed. Sequence alignment revealed base substitutions for certain samples, indicating possible population differences. Analysis of molecular variance (AMOVA) also provided a significant <i>Fst</i> value (0.874; <i>p</i> value = 0.00000 ± 0.00000), confirming the population difference in individuals inhabiting the lake. Genetic lineages of these populations towards the global <i>M. rosenbergii</i> populations were investigated using developed and acquired <i>COI</i> sequences for this species. A phylogenetic tree based on neighbor-joining (NJ) analysis and population network revealed the presence of western and central populations in Vembanad Lake. This study recommends identification of natural stocks of <i>M. rosenbergii</i> inhabiting different geographical realms through genetic approaches.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"17 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diets comprising hen egg yolk and milk proteins as potential alternatives to shark egg-based diets for larvae of the Japanese eel Anguilla japonica","authors":"Hirofumi Furuita, Tadao Jinbo, Masato Higuchi, Kazuharu Nomura, Ryusuke Sudo, Hiroyuki Matsunari, Koji Murashita, Hiromi Oku, Takeshi Yamamoto, Hideki Tanaka","doi":"10.1007/s12562-024-01752-7","DOIUrl":"https://doi.org/10.1007/s12562-024-01752-7","url":null,"abstract":"<p>The only diet that has been capable of rearing eel larvae to the glass eel stage in captivity is the shark egg (SE)-based diet (SE). This study investigated the potential of alternative dietary components, namely hen egg yolk (HEY), milk proteins, and fish protein hydrolysate (FPH), on the growth and survival of eel larvae. In the first experiment, a diet containing HEY and skimmed milk powder (HS) was compared to SE. There were no significant differences in growth and survival rate between the two diets except in the early part of the experiment period. In the second experiment, HS was modified by the addition of FPH and casein (FC), and larval performance was evaluated for three dietary regimens (SE, HS, and FC). The performance of larvae fed HS and FC was found to be comparable or superior to those fed SE. It was observed that larvae fed the alternative diets to SE were able to progress to glass eels. However, more skeletal abnormalities were observed in HS in experiment 1. The results of this study indicate that a combination of HEY and milk proteins is suitable as a larval eel diet, and that it has the potential to replace SE.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"1 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139581479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fisheries SciencePub Date : 2024-01-27DOI: 10.1007/s12562-024-01753-6
Zhicheng Sun, Linlong Wang, Yefu Kong, Jiachen Sun, Bin Kang
{"title":"Transcriptional regulation and alternative splicing reveal the molecular strategies of Bombay duck Harpadon nehereus to hypoxia","authors":"Zhicheng Sun, Linlong Wang, Yefu Kong, Jiachen Sun, Bin Kang","doi":"10.1007/s12562-024-01753-6","DOIUrl":"https://doi.org/10.1007/s12562-024-01753-6","url":null,"abstract":"<p>Bombay duck <i>Harpodon nehereus</i> has undergone a dramatic shift from a by-catch fish species to the dominant species in the southeast coast of China. This shift has led to economic growth in the fishery and has had a significant impact on community structure, biodiversity, and resource competition in the ecosystem. Strong hypoxia tolerance may be one of the contributing factors for its population growth. This study compared the transcriptional regulation and alternative splicing in <i>H. nehereus</i> from the normoxic and hypoxic zone near the Yangtze Estuary. Compared with normoxia, the number of alternative splicing events increased in the gill and heart but decreased in the muscle after hypoxia, among which exon skipping was the most prevalent type in different tissues. Enrichment analysis showed that differentially expressed genes and genes with differentially alternative exons were mainly enriched in transmembrane transport and glycerophospholipid metabolic process in gill, cell cycle, and FoxO signaling pathway in heart, as well as cell cycle and reduced metabolic rate in muscle. Key candidate genes may be associated with gill remodeling, elevated heart rate, and muscle angiogenesis function. This study provides valuable genetic clues for evaluating molecular regulation strategies related to hypoxia tolerance in marine fishes.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"1 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139581623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fisheries SciencePub Date : 2024-01-24DOI: 10.1007/s12562-024-01748-3
Atsushi Tsuyuki, Tetsuya Umino
{"title":"Horizontal movements and home range of black sea bream Acanthopagrus schlegelii in the natural coast of Hiroshima Bay, Japan","authors":"Atsushi Tsuyuki, Tetsuya Umino","doi":"10.1007/s12562-024-01748-3","DOIUrl":"https://doi.org/10.1007/s12562-024-01748-3","url":null,"abstract":"<p>Knowledge of fish movement ecology contributes to the improvement of fishery resource management actions. We investigated the horizontal movement of the black sea bream <i>Acanthopagrus schlegelii</i> around the natural coast of Nishinoumishima Island in Hiroshima Bay, using active acoustic tracking. Six adult fish equipped with depth transmitters were tracked for a total of 54 days in the bay. Five tagged fish were fully tracked for 9–10 consecutive days after release. Tagged fish were found in the intertidal zone and adjacent subtidal zones, which were shallower than 12 m, and within 170 m off the coastline. The mean daily movement distance and 95% kernel utilized density of tagged fish were 191 ± 272 m and 60,207 ± 99,437 m<sup>2</sup>, respectively. The swimming depth of the tagged fish was 1–4 m above the seafloor. We opine that the littoral area (< 12 m in depth), which includes the intertidal zone and adjacent subtidal zone, is an important habitat for black sea bream.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"39 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139557350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Euryhaline copepod Pseudodiaptomus inopinus changed the prey preference of red sea bream Pagrus major larvae","authors":"Taku Sasaki, Hideaki Matsui, Yusuke Kuwabara, Saichiro Yokoyama, Manabu Ishikawa, Tomonari Kotani","doi":"10.1007/s12562-024-01751-8","DOIUrl":"https://doi.org/10.1007/s12562-024-01751-8","url":null,"abstract":"<p>We evaluated the potential of the euryhaline copepod <i>Pseudodiaptomus inopinus</i> as a prey to enhance the feeding activity of red sea bream <i>Pagrus major</i> larvae. <i>Pseudodiaptomus inopinus</i> was used to evaluate free amino acid composition and dietary effects on the rearing performance of fish larvae, in comparison to rotifers (control prey). Among free amino acids, alanine, arginine, and glycine were markedly higher in <i>P. inopinus</i> than in rotifers. Larvae were reared for 20 days post-hatching under three feeding treatments: rotifers (control), rotifers supplemented with copepods, and copepods only. Larvae fed copepods alone had a higher growth rate than those in the other treatments. However, the survival rates of these larvae were lower than those under control or copepod supplementation. While equivalent stocking densities of rotifers were employed in the rearing water for both larvae, whether supplemented with copepods or not, the supplemented treatment yielded diminished larval survival and failed to enhance growth rates. According to gut content analysis, larvae receiving supplemented treatment preferentially fed on copepods, and the number of ingested rotifers was reduced. As a result, total ingested mass was lower in the supplemented larvae. This study suggests that copepods containing free amino acid species negatively affect prey acceptance of fish larvae.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"4 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139557325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Distribution of tetrodotoxin and its analogs in the toxic flatworm Planocera multitentaculata from Honshu Island, Japan","authors":"Rei Suo, Makoto Tanaka, Masaki Asano, Ryota Nakahigashi, Masaatsu Adachi, Toshio Nishikawa, Shouzo Ogiso, Hajime Matsubara, Nobuo Suzuki, Shiro Itoi","doi":"10.1007/s12562-024-01754-5","DOIUrl":"https://doi.org/10.1007/s12562-024-01754-5","url":null,"abstract":"<p>Tetrodotoxin (TTX), one of the most potent naturally occurring neurotoxins, has been detected in both marine and terrestrial organisms. The marine polyclad flatworm <i>Planocera multitentaculata</i> is known to contain high levels of TTX throughout its life cycle, including in the egg and larval stages. We recently reported that <i>P. multitentaculata</i> from the coastal area of Hayama, Kanagawa, Japan, possesses TTX analogs including 5,6,11-trideoxyTTX, monodeoxyTTXs, dideoxyTTXs, and 11-norTTX-6(<i>S</i>)-ol. It is not known whether all <i>P. multitentaculata</i> occurring in the Japanese archipelago possess major TTX analogs, or whether regional variations in TTX profile exist. In this study, we used high-resolution liquid chromatography–mass spectrometry to investigate the content profile of TTX and its analogs in <i>P. multitentaculata</i> collected from several regions of the Japanese coast. We detected TTX and its major analogs 5,6,11-trideoxyTTX, dideoxyTTXs, monodeoxyTTXs, and 11-norTTX-6(<i>S</i>)-ol in all specimens regardless of the sampling site. In addition, their relative proportions showed a similar pattern. These results suggest that the flatworm may have mechanisms involved in maintaining the proportions of TTX and its analogs in the body. How the toxic flatworms acquire the highly concentrated toxins and maintain the proportions of TTXs is therefore of great interest and further investigation.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"53 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139508738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Extraction, microstructural, and FTIR characterization of elastin from skin and swim bladder of Caspian white fish Rutilus kutum","authors":"Rezvan Mousavi-Nadushan, Naghmeh Roohi-Shalmaee, Milad Mahmoodi-Kelarijani","doi":"10.1007/s12562-023-01733-2","DOIUrl":"https://doi.org/10.1007/s12562-023-01733-2","url":null,"abstract":"<p>The Caspian white fish or Caspian kutum <i>Rutilus kutum</i> is only found on the Iranian coastline of the Caspian Sea. This study investigated the extraction process of soluble/insoluble elastin from skin/swim bladder of <i>Rutilus kutum</i> on the basis of organic acid hydrolysis and hot alkali methods. Fourier-transform infrared (FTIR) spectroscopy analysis exhibited typical peaks at low frequency for amide I centered at ∼ 1633 cm<sup>−1</sup> and amide II at ∼ 1538 cm<sup>−1</sup>. The comparative spectra indicated similar α-helix and β-sheet content of soluble/insoluble elastin in skin and swim bladder. The high content of amide I/II and increased polarity of soluble elastin can improve their reactivity in food matrices/textures or biopolymer design, whereas insoluble elastin powder, containing less amide I/II content and weaker dipoles, may be an alternative source for cell culture and tissue engineering. The purity of the soluble elastin from skin/swim bladder was confirmed through SDS-polyacrylamide gel electrophoresis (SDS-PAGE) analysis with an apparent molecular weight of 40 kDa, and hydrolyzed insoluble elastin generated an individual protein band at the same molecular mass containing some diffused ground proteins in the 35–45 kDa range and no contamination with collagen. Scanning electron microscopy (SEM) images of elastin presented fibrillar bundles with different diameters and peripheral beta sheets, with such constructions being appropriate features for the design of diverse biomimetic scaffolds.</p>","PeriodicalId":12231,"journal":{"name":"Fisheries Science","volume":"189 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139413344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}