{"title":"Aquaculture in Peru: Situation, Challenges and Prospects","authors":"Euler Dolores-Salinas, Lluís Miret-Pastor","doi":"10.1002/aff2.70082","DOIUrl":"https://doi.org/10.1002/aff2.70082","url":null,"abstract":"<p>Aquaculture in Peru is a sector with significant growth and development in recent years. However, it faces multiple challenges to ensure its sustainability. This study aims to characterize the Peruvian aquaculture system by analysing the public, private and educational stakeholders involved, as well as the productive, commercial and environmental challenges it encounters. A descriptive methodology was employed, utilizing quantitative data from secondary sources provided by public and private entities. The data reveal a substantial increase in the production and export of aquaculture products since the 1990s, peaking in 2019. However, since then, a decline in production and notable changes in export markets have been observed. This study identifies the key challenges facing Peruvian aquaculture and proposes a series of measures to ensure its sustainability.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Post-Stocking Annual Survival of Fingerling- and Catchable-Sized MYY Brook Trout Salvelinus fontinalis in a Small Stream","authors":"Jennifer L. Vincent, Kevin A. Meyer","doi":"10.1002/aff2.70077","DOIUrl":"https://doi.org/10.1002/aff2.70077","url":null,"abstract":"<p>The use of hatchery male fish with two Y chromosomes (M<sub>YY</sub>) to progressively shift sex ratios of wild populations to 100% male is a novel approach for eradication of undesirable nonnative fish populations, but M<sub>YY</sub> fish must survive post-release to successfully reproduce. Post-release apparent survival of 250 mm M<sub>YY</sub> brook trout <i>Salvelinus fontinalis</i> stocked in a small stream averaged % annually over the first five years of stocking but increased to 17% once stocking size was reduced to 130 mm. Results suggest that successful M<sub>YY</sub> eradication programmes may be contingent in part on M<sub>YY</sub> stocking size.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70077","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Benard Omboga Maranga, Kevin Mbogo Omolo, Robert Nesta Kagali, Paul sagwe Orina, Domitila Ndinda Kyule
{"title":"Fatty Acid Composition of African Catfish (Clarias gariepinus) Fed on Black Soldier Fly Larvae (Hermitia illucens) Formulated Diets","authors":"Benard Omboga Maranga, Kevin Mbogo Omolo, Robert Nesta Kagali, Paul sagwe Orina, Domitila Ndinda Kyule","doi":"10.1002/aff2.70078","DOIUrl":"https://doi.org/10.1002/aff2.70078","url":null,"abstract":"<p>A four-months feeding experiment was conducted to evaluate the effects of fishmeal (FM) replacement using black soldier fly larvae (BSFL) on the fatty acid composition of catfish. Diets containing 35% crude protein content (CP) were formulated with BSFL replacing FM at D<sub>1</sub> (50:50), D<sub>2</sub> (25:75), and D<sub>3</sub> (75:25) and tested using commercial diet D<sub>4</sub>. Fifty catfish fingerlings, each weighing (5.6±0.5)g, were stocked per tank in 12, 1000L capacity tanks and subjected to the dietary treatment. Whole body, liver and muscle tissues were obtained from experimental fish and analysed for fatty acid composition using gas chromatography in the laboratory. Results showed significant variation (p< 0.05) in fatty acid composition between dietary treatments and fish tissues analysed. The BSFL inclusion rates in diets had an impact on the fatty acid composition of fish tissues. Values obtained for saturated fatty acid (SFA) and monounsaturated fatty acids (MUFA) for fish tissues analysed were higher compared to values obtained for SFA and MUFA in diets. Values obtained for polyunsaturated fatty acid (PUFA) for fish tissues were lower compared to values obtained for PUFA in diets. Muscle tissues of fish fed on D<sub>2</sub> and D<sub>3</sub> obtained the highest levels of SFA and MUFA, respectively, while whole body tissue of fish fed on D<sub>1</sub> obtained the highest value for PUFA. Liver tissue for fish fed on D<sub>3</sub> and D<sub>1</sub> obtain substantially high levels of MUFA and PUFA. The highest concentration of PUFA in fish tissues was obtained for D<sub>1</sub> with 50% BSFL replacement; thus, D<sub>1</sub> is recommended for catfish diet formulation.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adaptive Reproductive Strategies in Schizothoracine Fishes: Dual Spawning Phases and Environmental Synchronization in Himalayan Ecosystems","authors":"Syed Talia Mushtaq","doi":"10.1002/aff2.70081","DOIUrl":"https://doi.org/10.1002/aff2.70081","url":null,"abstract":"<p>Schizothoracine fishes, endemic to the Himalayan region, exhibit remarkable adaptive reproductive strategies in response to their challenging high-altitude aquatic environments. This review synthesizes current knowledge on the dual spawning phases and environmental synchronization observed in these species, with a focus on the genus <i>Schizothorax</i>. These fishes demonstrate a unique ability to spawn twice annually, with distinct breeding periods in summer (June–October) and winter (January–March). Dual spawning phases allow Schizothoracine fishes to optimize reproductive output by synchronizing hatching and larval emergence with periods of high food availability and favourable temperatures, thereby increasing offspring survival (Bromage et al. 1993; Tao et al. 2018). This reproductive plasticity is closely synchronized with environmental cues such as water temperature, discharge, and photoperiod, allowing for optimized breeding cycles in dynamic ecosystems. Notably, spawning periods may vary among populations of the same species based on local ecological conditions and elevational gradients. The review explores the adaptive significance of these strategies, including increased reproductive success and enhanced population resilience. In addition, it examines the implications of these adaptations for conservation efforts in the face of climate change and anthropogenic pressures in the Himalayan region.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Petra Camilla Lindholm-Lehto, Kalle Sinisalo, Jani Tapio Pulkkinen, Tapio Kiuru
{"title":"Monitoring of Water Quality for Reduced Water Use in a Partial Recirculating Aquaculture System","authors":"Petra Camilla Lindholm-Lehto, Kalle Sinisalo, Jani Tapio Pulkkinen, Tapio Kiuru","doi":"10.1002/aff2.70080","DOIUrl":"https://doi.org/10.1002/aff2.70080","url":null,"abstract":"<p>Partial recirculating aquaculture systems (PRASs) aim for combining the benefits of flow-through systems (water use of approximately 50,000 L kg<sup>−1</sup> feed) and recirculating aquaculture systems (RASs, 500–1000 L kg<sup>−1</sup> feed). While water quality is usually excellent in flow-through systems, large volumes of water of good quality are required. In RAS, investment and production costs can be high, and due to the microbial actions typically occurring in RAS, off-flavours can occur and accumulate in fish flesh. Here, an evaluation between three water renewal rates (4000, 2000 and 1000 L kg<sup>−1</sup> feed) of a PRAS was performed. In the experiment, rainbow trout <i>Oncorhynchus mykiss</i> was reared in similar PRASs. Fish growth and a variety of water quality parameters were monitored, including 14 off-flavour compounds in the recirculating water, in the inlet water and in fish flesh. The results did not show statistical differences in feed conversion ratio (FCR), specific growth rate (SGR), and mortality between water renewal of 2000 and 4000 L kg<sup>−1</sup> feed, while reduced growth was observed at 1000 L kg<sup>−1</sup> feed. Additionally, total ammonia nitrogen (TAN) and nitrite–nitrogen (NO<sub>2</sub>─N) increased at reduced water renewal rates of 1000 and 2000 L kg<sup>−1</sup> feed (<i>p</i> < 0.005). Concentrations of off-flavours remained low in the circulating water, but in the circulating water and in fish flesh, they were above the known sensory thresholds at 1000 L kg<sup>−1</sup>. Overall, the results suggest that 2000 L kg<sup>−1</sup> feed offers good fish growth, feed use and low mortality without the unwanted off-flavour accumulation.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ousmane Sarr, Richard Kindong, Fambaye Ngom Sow, Rim E. L. Amouri, Nfally Sadia Petit Sadio, Siquan Tian
{"title":"Key Biological Information on Atlantic Bonito From Small-Scale Fishery in the Senegal Exclusive Economic Zone","authors":"Ousmane Sarr, Richard Kindong, Fambaye Ngom Sow, Rim E. L. Amouri, Nfally Sadia Petit Sadio, Siquan Tian","doi":"10.1002/aff2.70017","DOIUrl":"https://doi.org/10.1002/aff2.70017","url":null,"abstract":"<p>Biological parameters are critical for the sustainable management of fisheries globally, providing critical insights into population dynamics, ecological interactions, and fish stock resilience. In the Senegalese Exclusive Economic Zone (SEEZ), valuable biological information required for Atlantic bonito stock assessment and implementing effective management measures is either limited or nonexistent. This study aims to address this gap by examining some important biological parameters of Atlantic bonito, one of the most targeted species of small tuna by small-scale fisheries in the Senegal fishing area. The results reveal important biological aspects, such as the length–weight relationship coefficient (a) of 0.0062 and the rate of weight change with length (b) of 3.2346, which is significantly greater than 3.0. These findings suggest that most fish species exhibit moderately positive allometric growth and an increase in relative body size or weight. The Fulton's condition factor (<i>K</i>) of the combined data ranged 1.18–1.48 (1.34 ± 0.14), suggesting that the fish are well-nourished in relation to their size. Furthermore, the age of Atlantic bonito in Senegalese waters is approximately 4.6–5 years. The final main growth parameters obtained were <i>L</i><sub>inf</sub> = 73.01 cm fork length, with estimated sizes at first maturity (<i>L</i><sub>m50</sub>) for males and females being 42.09 and 38.56 cm, respectively, and 40.75 cm for combined sexes. The results provide important biological aspects for assessing the Atlantic bonito stock, establishing robust harvest control rules (HCRs) for fisheries management, and supporting sustainable fishing for this small tuna for the benefit of coastal communities in the Northeastern Atlantic Ocean.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seth Adusei, Emmanuel Kwesi Arthur, Emmanuel Gikunoo, William Amponsah, Frank Ofori Agyemang, Godfred Ohemeng-Boahen
{"title":"Heavy Metal Pollution From Illegal Mining ‘Galamsey’ Activities on the Viability of Clarias gariepinus in the Oda River, Ghana","authors":"Seth Adusei, Emmanuel Kwesi Arthur, Emmanuel Gikunoo, William Amponsah, Frank Ofori Agyemang, Godfred Ohemeng-Boahen","doi":"10.1002/aff2.70076","DOIUrl":"https://doi.org/10.1002/aff2.70076","url":null,"abstract":"<p>Activities associated with illegal mining, ‘galamsey’, often result in significant environmental degradation, particularly to water bodies. In the case of River Oda, like all other affected areas in Ghana, galamsey operations contribute to the pollution of the water body with some heavy metals such as mercury (Hg), cadmium (Cd) and arsenic (As). These heavy metals have posed a significant threat to the aquatic environment (fish population) and human health. In this study, the effect of the concentration of Hg, Cd and As at varying concentrations (2, 4 and 6 ppm) and its interactions on the growth and survival of <i>Clarias gariepinus</i> fingerlings was investigated. A total of 154 <i>C. gariepinus</i> fingerlings were exposed to varying concentrations of the heavy metals for 42 days. The results revealed that Hg exhibited a negative effect on fish survival, whereas Cd showed a positive impact, with varying patterns of growth and mortality rates within the three concentrations. As, however, showed no significant effect on the growth and survival of fingerlings. Combinations of Hg, Cd and As concentrations resulted in a significant negative effect on fish growth and survival. Furthermore, the interactions between Hg and Cd, as well as Hg and As, had negative significant impacts on the fingerlings, with higher concentrations resulting in lower growth and survival rates. Cd and As had a positive effect on the fingerlings. The study concluded that a higher concentration of Hg, with or without the presence of other heavy metals, may result in the high reduction of growth and survival of fish. This research highlights the environmental risks of continuous Hg, Cd and As release into the River Oda, emphasizing the need for monitoring and control to protect ecosystems, human well-being and local economies as called for in Sustainable Development Goal 6.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Impact of Lupin and Grass Pea Mixture Meal as Dietary Inclusion on Body Composition and Haematological Parameters of Nile Tilapia Fingerlings in a Recirculation Aquaculture System","authors":"Tsegay Fisseha, Akewake Geremew, Tadesse Fetahi, Kasim Abass","doi":"10.1002/aff2.70073","DOIUrl":"https://doi.org/10.1002/aff2.70073","url":null,"abstract":"<p>The study investigated the effects of fishmeal replacement with a mixture of lupin and grass pea meal (LGM) at inclusion levels of 0%, 25%, 50% and 75% as potential plant protein sources in the diets of Nile tilapia fingerlings on body composition and haematological parameters. Experimental diets were formulated to be iso-nitrogenous (36 g 100 g<sup>−1</sup>), iso-lipidic (10 g 100 g<sup>−1</sup>) and iso-energetic (18 kJ g<sup>−1</sup>), fed at 6%–10% of their body weight per day. A total of 276 fingerlings with an average initial body weight of 1.37 ± 0.06 were stocked into four treatments, each in triplicate, using a completely randomized design for 12 weeks. Results showed no significant differences (<i>p</i> < 0.05) in Hct, RBCs, WBCs and MCV across all LGM diet levels. However, an increasing trend of Hb, MCH and MCHC has been shown by fishes fed with LGM75. MCH and MCHC values decreased in groups fed LGM25 and LGM50 compared to the control and LGM75. MCV did not show significant differences with higher LGM protein levels. The differential WBC count of Nile tilapia fingerlings was dominated by lymphocytes (% mm<sup>−3</sup>), and lymphocytes, monocytes, neutrophils and eosinophils were identified, but basophils were not counted. Monocyte and eosinophil counts were not significantly different (<i>p</i> < 0.05) from the control diet. Fish fed LGM75 and LGM50 had higher HSI than those on the control and LGM25, with an increasing trend observed at higher LGM protein levels. LGM proteins have positively influenced carcass composition, haematological parameters and growth, suggesting improved overall health, vitality and a cost-effective fishmeal alternative. Furthermore, successful uses of LGM proteins lead to healthier fish populations, improved resilience against diseases, survival rates and a more sustainable aquaculture. These feed ingredients can support fish farmers and contribute to affordable and accessible feed alternatives supporting a sustainable aquaculture industry. Overall, there are promising nutritional and haematological justifications for replacing fish meal with LGM protein sources in Nile tilapia diets.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kinsey Frick, Mary L. Moser, Theresa Liedtke, Lisa Weiland, Alexa N. Maine, Aaron D. Jackson
{"title":"Performance Comparisons for Artificially Propagated and Wild Pacific Lamprey Juveniles and Larvae","authors":"Kinsey Frick, Mary L. Moser, Theresa Liedtke, Lisa Weiland, Alexa N. Maine, Aaron D. Jackson","doi":"10.1002/aff2.70070","DOIUrl":"https://doi.org/10.1002/aff2.70070","url":null,"abstract":"<p>Artificially propagated Pacific lamprey (<i>Entosphenus tridentatus</i>) are produced for restoration and for use in dam passage studies to reduce the demand for wild fish. Such uses require that animals are representative of their wild counterparts. Previous work indicated that this is true for Pacific lamprey larvae and juveniles reared in the hatchery with respect to the length of sustained swimming. However, more subtle differences in behaviour and performance that lamprey need to survive have not been assessed. In this study, artificially propagated and wild fish were compared in laboratory tests under no-flow conditions to examine light avoidance, burrowing speed, burst swim speed, volitional routine swim speed and time to come to rest. Most larvae burrowed in less than a minute, and we found highly significant differences (<i>p</i> < 0.001) between artificially propagated and wild larvae burrowing times, a critical escape behaviour. This could have implications for studies of larval entrainment at irrigation diversion canals or in turbine boils at dams. Interestingly, all of the wild juveniles tested came to rest quickly after introduction to the chamber (1.5 min), while artificially propagated lamprey swam robotically near the surface and 48% did not come to rest in the first 10 min (median time to rest = 9.5 min). In contrast, wild juveniles quickly (median = 1.47 min) sought areas near the tank bottom and attached strongly with their oral disc. Such behavioural differences could have important survival consequences for artificially propagated lamprey as they approach turbine intakes, bypass screens and irrigation diversion headgates. This study highlights the need to conduct behavioural assays that examine subtleties of fish behaviour that can be missed with traditional swim tunnel comparisons.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144085198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cyclical short-term fasting and refeeding effects on immunological alteration of the disk abalone, Haliotis discus discus","authors":"Dien Arista Anggorowati, Liqing Zang, Yutaka Tamaru, Takahiko Aoki, Fumiyoshi Okazaki","doi":"10.1002/aff2.70061","DOIUrl":"https://doi.org/10.1002/aff2.70061","url":null,"abstract":"<p>Starvation is a frequent challenge for many animals in their natural habitats. In aquatic ecosystems, certain fish and shellfish experience prolonged and short-term starvation stress, particularly during periods of extreme weather in the wild and inadequate feeding practices in aquaculture systems. Nutritional deficiencies caused by either short-term or prolonged starvation can lead to stress-induced health issues in fish and shellfish. Our study aimed to assess the impact of repeated short-term fasting and refeeding on immunological parameters and growth performance in the disk abalone, <i>Haliotis discus discus</i>. Abalones were randomly assigned to three distinct feeding patterns, with three replicates per group: Group I underwent continuous feeding for 35 days (CF), Group II experienced a repetitive cycle of 3-day fasting and 4-day refeeding for 35 days (PF) and Group III underwent no feeding for a 35-day period (NF). We measured survival and growth rate as well as analysed immunological parameters, such as total haemocyte count, phenoloxidase activity, respiratory burst activity, lysozyme activity and protein content across the groups. The results indicated that different feeding treatments impacted these immune responses differently across groups. Specifically, the group exposed to NF experienced a significant reduction in total haemocyte count (THC), respiratory burst activity and protein concentration, whereas phenoloxidase activity and lysozyme activity were highest in this group. The CF group showed no significant changes in respiratory burst activity, protein content, phenoloxidase activity and lysozyme activity. In contrast, the cycling short-term fasting and refeeding (PF) group exhibited higher lysozyme and phenoloxidase activities but had a lower THC. No differences were observed for respiratory burst activity and protein content in this group. This study demonstrated that the functionality of the innate immune system in abalone could be affected by nutritional status under starvation and refeeding.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70061","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}