Journal of Applied Ichthyology最新文献

{"title":"Bangana devdevi, a Native Carp of the Himalayan Biodiversity Hotspot: Reproductive Biology and Hormonal Breeding Efforts for Conservation and Aquaculture Promotion","authors":"Yumnam Bedajit,&nbsp;Surajkumar Irungbam,&nbsp;Soibam Ngasotter,&nbsp;David Waikhom,&nbsp;Maibam Malemngamba Meitei,&nbsp;Sanjenbam Bidyasagar Singh,&nbsp;Wangkheimayum Malemnganbi Devi,&nbsp;Soibam Khogen Singh,&nbsp;Pronob Das,&nbsp;Soibam Basanta Singh","doi":"10.1155/2024/5556553","DOIUrl":"https://doi.org/10.1155/2024/5556553","url":null,"abstract":"<div>\u0000 <p>Efficient conservation efforts for valued fish species such as <i>Bangana devdevi</i>, a medium-sized minor carp prevalent in Southeast Asian countries, can be facilitated through well-established artificial breeding techniques. This study aimed to investigate the reproductive biology of <i>B. devdevi</i> and focused on optimizing hormone dosages for breeding purposes for the first time. The research findings indicated that the highest gonadosomatic index (GSI) for males (1.17) was observed in August, while for females, it peaked in July (2.24). Female fish exhibited absolute fecundity ranging from 2089 to 26287 eggs, corresponding to body weights ranging between 10.46 and 153.73 g. The relative fecundity ranged from 170 to 298 eggs g⁻¹ of body weight. To induce breeding, female brooders were administered Gonopro-FH hormone through three experimental groups: G-FH_0.4, G-FH_0.5, and G-FH_0.6, with doses of 0.4 mL, 0.5 mL, and 0.6 mL·kg⁻¹ of body weight, respectively. Spawning occurred within 6–10 h after hormone administration. Among these groups, G-FH_0.5 exhibited the highest fertilization rate (94.25%) and hatching rate (89.03%), significantly surpassing the rates observed in G-FH_0.4 and G-FH_0.6 (<i>p</i> &lt; 0.05). This study provided valuable insights into the reproductive biology of <i>B. devdevi</i> and emphasized its potential application in developing management and conservation strategies for this species in rivers and tributaries. Furthermore, the knowledge gained from induced breeding holds promise for future large-scale seed production initiatives.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5556553","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141624535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effects of Desiccation on the Antioxidant Defense, Immune Responses, and Nitrogen Metabolism of Red Swamp Crayfish Procambarus clarkii","authors":"Shuquan Ding,&nbsp;Haomiao Chi,&nbsp;Kun You,&nbsp;Mei Huang,&nbsp;Mengxiao Wu,&nbsp;Linjiang Zhang,&nbsp;Xingyan Cui,&nbsp;Ran Xu,&nbsp;Yunlong Zhang","doi":"10.1155/2024/5767457","DOIUrl":"https://doi.org/10.1155/2024/5767457","url":null,"abstract":"<div>\u0000 <p>Desiccation due to air exposure is a common environmental stress that harms the health of crustaceans. How crustaceans respond to air exposure remains largely unclear. In this research, we explored the physiological responses and gene regulation under air exposure of an invasive species <i>Procambarus clarkii</i>, which is the most commonly cultured freshwater crustacean in China. Toll3 belonging to the Toll-like receptor family and proPO in the prophenoloxidase-activating system were two important immune responses to air exposure. In addition, air exposure can also influence ammonia metabolism via regulating the expression of the key genes. <i>Prx6</i> and proPO showed quick responses and high sensitivity to air exposure, suggesting the potential to be the biomarker for desiccation stress assessment in crayfish. The results of this research can provide useful information for monitoring desiccation stress, as well as transport and sale management in red swamp crayfish.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5767457","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141624536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population Genetic Structure of Petroleuciscus borysthenicus (Kessler 1859) in Northwestern Türkiye Using Mitochondrial COX1 Gene","authors":"Sevan Ağdamar,&nbsp;Gülşah Saç,&nbsp;Ümit Acar,&nbsp;Özcan Gaygusuz,&nbsp;Ersin Doğaç,&nbsp;Müfit Özuluğ","doi":"10.1155/2024/6851143","DOIUrl":"https://doi.org/10.1155/2024/6851143","url":null,"abstract":"<div>\u0000 <p><i>Petroleuciscus borysthenicus</i> is a species with a wide distribution from the eastern, western, and northern Black Sea and Azov Sea basins, the Aegean Sea basin, and Northwestern Türkiye. However, there has been relatively little attention on the genetic variability of this species in their native distribution range, and nearly no study has been conducted in Türkiye despite its importance in biodiversity. The aim of this study was to elucidate the genetic variability and population structure of <i>P. borysthenicus</i> from Northwestern Türkiye using an integrated molecular method. A total of 72 specimens were collected from 13 localities in the Northwestern part of Türkiye. A total of six haplotypes were identified in all specimens. A relatively low level of genetic variability was found for <i>P. borysthenicus</i> throughout the study region based on the indices of genetic diversity including haplotype diversity and nucleotide diversity for the cytochrome oxidase subunit I (<i>h</i> = 0.507, <i>π</i> = 0.0027). The pairwise <i>F</i>_{<i>S</i><i>T</i>} values between the samples ranged from −0.123 to 1.000. Furthermore, our results revealed no provable recent demographic expansion for <i>P. borysthenicus</i> from Northwestern Türkiye. However, more studies using additional geographic sampling and molecular analysis are needed to enhance our knowledge of the diversity and distribution of this species.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/6851143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141489018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population Dynamics of the Sebastes schlegelii Stock in Zhangzi Island’s Waters, China: Implications for Management and Conservation","authors":"Keru Niu,&nbsp;Zengqiang Yin,&nbsp;Guojin Xue,&nbsp;Qian Cheng,&nbsp;Chaozhong Xin,&nbsp;Lijuan Han,&nbsp;Yonghu Liu","doi":"10.1155/2024/8547916","DOIUrl":"https://doi.org/10.1155/2024/8547916","url":null,"abstract":"<div>\u0000 <p><i>Sebastes schlegelii</i> is a species of great economic significance in Zhangzi Island’s waters in the Northern Yellow Sea. Since the beginning of the 21^st century, there has been a significant decline in the fishery resources of <i>Sebastes schlegelii</i>, and the reduction in size has become increasingly apparent. Therefore, it is imperative to understand the characteristics of <i>Sebastes schlegelii</i> and develop management tactics. Based on biological data from <i>Sebastes schlegelii</i> collected in Zhangzi Island’s waters, an analysis was conducted on the relationship between body length and weight, growth equations were formulated, and an assessment was made of the resources’ status. The study simulated and evaluated the effects of various closed season management strategies on egg production per recruit (EPR) and spawning biomass per recruit (SBR). The results showed the following. (1) The length-weight relationship was <i>W</i> = 5 × 10⁻⁵<i>L</i>^2.882. (2) Von Bertalanffy’s growth equation was <i>L</i>_<i>t</i> = 450[1 − <i>e</i>^{−0.31(<i>t</i>+0.42)}] and <i>W</i>_<i>t</i> = 2215.8[1 − <i>e</i>^{−0.31(<i>t</i>+0.42)}]^2.882. (3) The resource is in an overfished state with an exploitation rate (<i>E</i>) of 0.737, a steady-state biomass of 1471 t, and a maximum sustainable yield of 466 t. (4) The closed season for <i>Sebastes schlegelii</i> in Zhangzi Island’s waters is suggested to be from November to February, coinciding with the recovery of the EPR value to 68.33% and the SBR value to 29.53%.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8547916","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fresh vs. Preserved Specimens: Length-Weight Relationships of Fishes from the Western Amazon (Napo Basin, Ecuador)","authors":"Karla S. Barragán,&nbsp;Junior Chuctaya,&nbsp;Daniel Escobar-Camacho,&nbsp;José Vieira,&nbsp;Andrea C. Encalada","doi":"10.1155/2024/2430326","DOIUrl":"https://doi.org/10.1155/2024/2430326","url":null,"abstract":"<div>\u0000 <p>Length-weight relationship (LWR) studies are important for fish taxonomical analysis, ecological assessments, management, and conservation practices. Although LWR studies can use measurements of either fresh or preserved specimens, few studies have directly compared these methods. This study analyzed the effect of preservation on LWR of ten small-sized freshwater fish species from the Curaray River basin (Napo Basin), eastern Ecuador. 255 wild specimens were measured, weighed, fixed in formalin, and finally preserved in 70% ethanol. 287 specimens from the same species batch were measured again after preservation. We estimated LWR curves with linear regressions and compared slopes and intercepts between fresh and preserved specimens. The preservation process altered weight significantly for all ten species and altered both weight and length for two species. The magnitude of change varied according to the morphology and maximum size of each species. Smaller individuals exhibited greater proportional weight losses. LWR estimates for eight of the species are new to science. These results present new evidence of the preservation effects in LWR studies as well as a compilation of the varying results reported in the literature. We conclude that measurements on fresh specimens should be encouraged for LWR studies. However, recognizing that this is not always feasible, studies using preserved specimens should consider the effects of preservation on body length and weight.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/2430326","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Length-Weight and Length-Length Relations of 14 Freshwater Fish Species from the Qiantang River, China","authors":"Yangxin Dai,&nbsp;Nan Xie,&nbsp;Yulai Dai,&nbsp;Wei Guo,&nbsp;Jinyu Tang,&nbsp;Yuxi Wang","doi":"10.1155/2024/4101501","DOIUrl":"https://doi.org/10.1155/2024/4101501","url":null,"abstract":"<div>\u0000 <p>The Qiantang River, located in Zhejiang Province, China, is a crucial water resource with significant ecological and economic importance. This study aimed to evaluate fishery resources in the Qiantang River Basin by analyzing the length-weight relationships (LWRs) and length-length relationships (LLRs) of 14 fish species. Fish samples were collected between July 2021 and November 2023 using multipanel nylon gillnets and cage nets. Each specimen was measured for total length (TL) and standard length (SL), as well as weighed. Linear regression models were employed to estimate LWRs and LLRs, with statistical tests revealing significant relationships (<i>P</i> &lt; 0.05) and high <i>R</i>² values above 0.91. The study contributed new LWRs for two species and LLRs for three, deepening our understanding of their biology. These findings enriched FishBase and offered valuable data for fish stock assessments and management strategies in the Qiantang River Basin. Future research can utilize this foundation to explore population dynamics and promote sustainable management practices.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/4101501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evidences of Gonadal Impairment and Growth Acceleration in Barbonymus gonionotus Fed Papaw Seed: Sustainable Green Alternatives for Energy Portioning","authors":"Upendra Suman,&nbsp;Gusheinzed Waikhom,&nbsp;Soibam Khogen Singh,&nbsp;Yumnam Abungcha Mangang,&nbsp;Reshmi Debbarma,&nbsp;Pradyut Biswas,&nbsp;Pronob Das,&nbsp;Soibam Basanta Singh","doi":"10.1155/2024/5663091","DOIUrl":"https://doi.org/10.1155/2024/5663091","url":null,"abstract":"<div>\u0000 <p>Growth stagnation in early-maturing fish is a concern for higher fish productivity and may be regulated with reproductive arrest using phytochemicals. In this line, the study attempts to improve the growth of silver barb, <i>Barbonymus gonionotus</i>, through dietary pawpaw (<i>Carica papaya</i>) seed (PS) supplemented diets during a 60-day trial (30-days of feeding PS, followed by a 30-day recovery period). Four levels of PS at 0, 2, 4, and 6 g kg⁻¹ diet were added to a commercial feed (32% crude protein) and fed to advanced fingerlings (19.08 ± 0.02 g) at 3% body weight, which forms the experimental groups, designated as control, T1, T2, and T3. Subsequent alterations in growth (% weight gain and specific growth rate), reproduction (gonadosomatic index (GSI) and gonadal histology), and physiological function (haematology and stress biomarkers, viz., cortisol and glucose) were examined at the end of the experiment. Observations noted at the end of the trial showed significantly (<i>P</i> &lt; 0.05) enhanced growth in groups fed 2 g kg⁻¹, but not significantly with control. GSI showed an extreme reduction in all groups as the level of supplementation increased with the lowest being noted in T3. Sex change was observed in T2 and T3, wherein only male populations were noticed. Gonadal histology demonstrates tissue-level generation in T1, compared with control. Tissue alteration (atrophy and necrosis) was noticed in the T2 and T3. The haematological profile indicates a gradual decrease in erythrocyte and leucocyte counts, packed cell volume, and haemoglobin in the T2 and T3 groups, compared with the T1 and control groups (<i>P</i> &lt; 0.05). Serum biochemistry followed a similar trend. The levels of blood glucose and cortisol were higher in T2 and T3 (<i>P</i> &lt; 0.05) than in the control and T1. The overall findings from this study reveal that dietary PS supplementation at 2 g kg⁻¹ can enhance the growth of silver barb; however, higher doses suppress both growth and reproductive function, resulting in subsequent disturbances in physiology. Further studies regarding the molecular mechanism of such an outcome warrant immediate investigation.</p>\u0000 </div>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5663091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141441364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Black Carp Mylopharyngodon piceus (Richardson, 1846) Mouth Gape and Size Preference of a Bivalve Prey","authors":"Patrick T. Kroboth,&nbsp;Benjamin H. Stahlschmidt,&nbsp;Duane C. Chapman","doi":"10.1155/2024/5551187","DOIUrl":"https://doi.org/10.1155/2024/5551187","url":null,"abstract":"<p>Black carp <i>Mylopharyngodon piceus</i> (Richardson, 1846) have been widely used as biological control of snails in aquaculture and were imported to the United States in the 1970s and 1980s for this purpose. Prior research emphasizes the species’ propensity to control gastropods, but since subsequent escape and establishment of black carp in portions of the Mississippi River Basin, concerns now focus on the numerous endangered and endemic bivalve species upon which black carp may predate. Black carp mouth gape may limit predation on larger bivalves, but bite force is also a factor. We used regression of fish length to mouth gape of wild-caught black carp and compared these results to tank forage size preference trials with bivalve prey <i>Corbicula fluminea</i> clams. Wild-caught black carp ranged from 429 to 1580 mm total length, a size range larger than measured in previous studies. Regression of fish length and mouth gape indicated greater variability among sizes, as expected from wild versus cultured populations. Clam consumption was size-dependent. Black carp commonly engulfed but did not consume the largest clams in tank feeding trials. Shell width was a better predictor of successful consumption than length or height. Predation was restricted at sizes less than the mouth gape of test black carp as observed by individuals engulfing but failing to consume prey. This result indicates that either bite force or the pharyngeal apparatus gape (i.e., the distance between the pharyngeal teeth and keratinous pad) limited successful crushing of engulfed shells. Bivalve predation by black carp is limited by both a fish’s ability to engulf prey and the ability to fracture the shell of larger prey items that cannot be broken or swallowed whole. The results of this research may be used to assess potential prey sizes of wild black carp and anticipated effects of predation on bivalve communities.</p>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165003","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":"Evaluating Exploitation of White Crappie and Black Crappie in Three Southeast Kansas Reservoirs","authors":"Danci L. Guiot,&nbsp;Seth A. Lundgren,&nbsp;Quinton Phelps,&nbsp;Hae Kim,&nbsp;Sean Lynott","doi":"10.1155/2024/7632622","DOIUrl":"10.1155/2024/7632622","url":null,"abstract":"<p>White Crappie (<i>Pomoxis annularis</i>) and Black Crappie (<i>P. nigromaculatus</i>) were studied in three southeast Kansas reservoirs to assess exploitation and determine if current regulations were conducive for sustainable populations. Trap nets were used to sample crappie in Elk City Reservoir, Big Hill Reservoir, and Parsons City Lake. Crappie measuring 210 mm and greater received Floy FD-94 tags that served as entries for rewards to encourage tag reporting. Harvest and angler demographic information were collected when tags were reported. Postcard surveys and motion-sensed cameras were used in conjunction to estimate angler effort and reporting rate on Parsons City Lake. Annual exploitation rates (i.e., percent of fish harvested) determined by tag returns and corrected for nonreporting and tag loss were 28.3%, 21.8%, and 3.9% on Elk City Reservoir, Big Hill Reservoir, and Parsons City Lake, respectively. Overfishing was not occurring, so current statewide regulations were likely appropriate, and no changes may be necessary.</p>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666480","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":"Length-Based Spawning Potential Ratio (LB-SPR) for Red Grouper (Epinephelus morio) and Associated Species in the Commercial Fishery of the Yucatan Peninsula, Mexico","authors":"Luis Alberto Rincón‒Sandoval,&nbsp;Jorge Alberto López‒Rocha","doi":"10.1155/2024/9960996","DOIUrl":"10.1155/2024/9960996","url":null,"abstract":"<p>The study calculated the Length-Based Spawning Potential Ratio (LB-SPR) for several species, including red grouper (<i>Epinephelus morio</i>), black grouper (<i>Mycteroperca bonaci</i>), gag grouper (<i>M. microlepis</i>), yellowtail snapper (<i>Ocyurus chrysurus</i>), lane snapper (<i>Lutjanus synagris</i>), hogfish (<i>Lachnolaimus maximus</i>), and white grunt (<i>Haemulon plumierii</i>). Data were obtained from the small-scale commercial fleet operating in the red grouper fishery on the Campeche Bank within the Yucatan Peninsula. Monthly records of total length (cm) from April 2017 to May 2018, totaling 10,182 fish, were collected from five fishing ports along the Yucatan Peninsula coast. Biological data, such as growth and reproductive patterns and exploitation parameters were gathered from scientific literature. The LB-SPR package on the R Core Team platform was utilized for analysis. Despite being the largest, groupers exhibited immaturity (SL₅₀ &lt; <i>L</i>₅₀) and low Spawning Potential Ratio (SPR). Red and black groupers showed particularly low SPR values (0.10 and 0.05, respectively), indicating a looming risk of local extinction. The gag grouper achieved the highest SPR value (0.26) among groupers, although it was very close to the minimum critical value (i.e., 0.20). Snappers, hogfish, and white grunt were generally captured in the adult state (SL₅₀ &gt; <i>L</i>₅₀). Yellowtail, hogfish, and white grunt displayed high SPR values (0.44, 0.72, and 0.98, respectively). Lane snapper had a low SPR (0.28) but fell within the range for maintaining satisfactory stock productivity, albeit with reduced yields. The findings emphasize the urgent need to adjust the current management framework for the red grouper fishery, focusing on improving fishing gear selectivity to address heightened pressure on both juvenile groupers and adult lane snapper. Implementing these measures is crucial to mitigate the risks of local extinction and population decline for each species.</p>","PeriodicalId":14894,"journal":{"name":"Journal of Applied Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140746668","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}