Local Fish Research Articles (Page 1)

The study examines the effects of culinary techniques on the organoleptic, nutritional, biochemical, microbiological, and heavy metal content of three commonly consumed fish species: Tenualosa ilisha (Ilish), Putius chola (Puti), and Labeo rohita (Rui). The curry samples of each fish exhibited excellent organoleptic quality, whereas the fresh samples had a lower moisture content (p < 0.05). Fried pieces had higher ash, protein, lipids, and carbohydrates (p<0.05). The culinary technique negatively affected the fried samples, leading to higher nutrient loss (p < 0.05), a higher per-oxide value (POV) (p < 0.05), and a higher total volatile base of nitrogen (TVBN) compared to raw and curry fish, as well as higher heavy metal retention (p < 0.05). As the Ni content of each fish item exceeds the permitted limit and the Cr content exceeds the limit in only Rui fish items, according to the WHO/FAO recommended maximum permissible limit, this creates concern for public health. In microbiological analysis, there is no significant difference between curry and fried items. In conclusion, the study demonstrated that curry fish was the most effective item in terms of culinary technique for retaining higher nutrients, nutritious compounds, and lower POV and TVBN values compared to other fish items.

The impact of colonial food paradigms on Indonesia’s nutrition policies and explore strategies for decolonizing perceptions of healthy food in East Nusa Tenggara (NTT) and Papua. Employing a comparative qualitative case study design, the research examines Indonesia alongside Vietnam and Peru, which have successfully integrated local foods into nutrition programs. Data collection involved secondary sources such as government reports, scientific articles, and policy documents, verified through data triangulation. The analysis utilized NVivo 12 Plus for thematic coding, focusing on actual conditions, challenges, and government responses related to food and nutrition governance. Results reveal that Indonesia’s persistent reliance on imported and industrialized foods, coupled with a diminished appreciation for indigenous foods like tubers, forest products, and local fish, hampers efforts to address malnutrition. Colonial legacies continue to influence public perception, overshadowing traditional foods' nutritional value. Conversely, Vietnam and Peru have demonstrated that embracing local food systems can significantly reduce stunting prevalence. The study concludes that adopting a decolonized, culturally sensitive approach to nutrition policies, which reintegrates local foods, is essential for improving nutritional outcomes and fostering food sovereignty in Indonesia. Such strategies can help reshape perceptions and enhance the resilience of local food systems against malnutrition.

Introduction: Loricariid species have been introduced in many countries in the world, causing negative ecosystem effects wherever they invade. Species from this family, also known as Pleco, have been recorded from Lake Nicaragua for several years. Objective: investigate basic aspects of the biology of Pleco in Lake Nicaragua, as an initial step to generating information to contribute to establishing management strategies for this species. Methods: We assessed relative abundance and relative weight, Gonadosomatic index (GSI), Capture optimization Index, Catch composition by Net type, and environmental variables. Results: 23 different species were captured, with the Pleco being the species represented in the greatest number of individuals and weight. Mature ovaries were observed throughout the year, except in July, GSI values were always high between September and June. High number of females were capture in September and October, as well as the period between March and May. The highest values of the capture optimization index were obtained in September and October. Additionally, the loricariids tended to prefer sites and times where water levels were deepest, potentially as a response to increased Río Frio’s flow. This aligns with the strategy of conserving energy by seeking areas of reduced water current. Conclusions: In the southeast of Lake Nicaragua, increases in Pleco (Hypostomus sp.) populations have been matched corresponding declines in the capture of species of commercial interest. As a result, switching to target the Pleco in the area could provide an opportunity for local fishers to extract an abundant resource and avoid the extraction of local species, as long as viable markets are developed for Pleco.

ABSTRACT No confirmed distribution of seahorses ( Hippocampus spp.) is recognized in Bangladesh, apart from a questionable record of Hippocampus kuda (Bleeker 1852). This study documents the occurrence of two newly recorded species, H. spinosissimus (Weber 1913) and H. trimaculatus (Leach 1814), alongside H. kuda , based on specimens collected from the coasts of Chattogram and Cox's Bazar. It provides a detailed account of their key characteristics, including morphometric measurements, meristic counts and photographic evidence. Seahorses in this region are caught as bycatch and are often discarded; however, a portion is channeled into niche markets by local fishers for small‐scale trade. The IUCN Red List designated H. kuda , H. spinosissimus and H. trimaculatus as vulnerable species. Major threats to these species include bycatch in artisanal fishing and habitat degradation, highlighting the need for better conservation measures. Accurate species identification is, therefore, a crucial first step in protecting these data‐deficient, flagship marine species.

This study evaluated the sensory acceptability of pizza topped with short mackerel (hasa-hasa) lamayo as the main ingredient. Using a quantitative experimental design, fifty (50) respondents composed of students, faculty, and residents assessed the product in terms of appearance, aroma, taste, and texture through a 9-point hedonic scale. Results showed that the pizza was generally rated as acceptable to highly acceptable across all sensory attributes. Taste emerged as the most favorable attribute, while aroma received more varied responses. Overall, the findings demonstrate that short mackerel (hasa-hasa) lamayo can be successfully adapted as a pizza topping, offering both an innovation and culturally rooted food product with potential for consumer acceptance. Based on the findings, it is recommended that local food businesses and pizzerias consider incorporating short mackerel lamayo as a topping to diversify menu options and promote sustainable use of local fish. Further, future studies may explore variations in preparation techniques to improve aroma acceptability. Keywords: Lamayo Pizza, Sensory Acceptability, Appearance, Aroma, Taste, Texture, Hasa-Hasa, Hedonic Scale, Experimental Research.

Indigenous communities that rely on the consumption of local fish and shellfish may have elevated exposures to environmental contaminants, such as PFAS (perfluoroalkyl and polyfluoroalkyl substances). Conventional public health communication that focuses on reducing consumption can conflict with cultural identities tied to harvesting local fish. Through a series of focus groups and interviews ( n = 25) and a community-wide survey ( n = 155) among members of the Mashpee Wampanoag Tribe (Cape Cod, Massachusetts, USA), we document the connection between local fish/shellfish consumption and Tribal cultural identity, how PFAS contamination may threaten this identity, and explore how to more effectively communicate health risks to Tribal communities.

Climate change induced environmental conditions and disasters especially cyclone continuously create hostile effects on the livelihood of coastal people of Bangladesh. Fisherfolks are front line witnesses of climate changes on the coastal area. In coastal region, Dacope upazila is one of the most disaster-prone areas so this study aimed at to understand the climate change and post-cyclone induced occupational vulnerabilities of fisherfolks. Using a qualitative approach, qualitative research methods such as in-depth interviews, focus group discussions, and key informant interviews were used to collect data through face-to-face interviews from local fishers and community experts in Dacope of Khulna in Bangladesh. Respondents were selected through purposive sampling and the total sample size was 13 The results reveal that fisherfolks are struggling with numerous and prolonged occupational vulnerabilities. Climate change induced cyclones have led to the loss of fishing boats and equipment and forcing fishers to rent boats at high prices. Additionally, many have incurred significant debt to recover from the damages caused by these cyclones. Then, due to climate change effects like decreased fishing productivity, fisherfolk are catching fewer fish and experiencing a decline in fish variety than earlier. Increased salinity in the rivers, their fishing boats and equipment frequently get damaged and leading to high repair costs. Consequently, they are not earning enough by fishing, and they are being compelled to engage in secondary occupation, change occupation, and migrating to the urban areas. So, this study concludes at, to reduce vulnerabilities, government, Non-Government Organizations and associated authorities should work according to the needs, create social securities, and long-term disaster management activities are also needed.

The Brazilian Amazon contains the world's most diverse fish assemblages. These assemblages can be affected by freshwater fisheries, which provide food and income for riverine people, and by accelerating environmental change. We collaborated with local fishers to provide a comprehensive assessment of the spatial patterns of fish use in 3 clear-water rivers in the Brazilian Amazon: the Tapajos, Trombetas, and Tocantins. We interviewed 638 fishers in 39 communities about fish use for domestic consumption or sale, daily catches per fisher, and catch per unit effort (CPUE). We then assessed the influence of river identity, protected areas (PAs), forest cover, and landscape complexity (independent variables) on catches and CPUE estimated from interviews (response variables) through linear models. We also analyzed data from participatory catch monitoring in 21 communities along the Tapajos River (5668 fish landings). Twenty-one fish species were the most harvested and cited by interview respondents, 16 of which were migratory fishes, accounting for 82% of catches in the Tapajos River. According to fishers, daily fish catches per fisher were higher outside PAs (effect size 0.33) than inside, whereas CPUE was higher inside PAs than outside (-0.27). Catches were negatively associated with forest cover (-0.20), whereas river landscape complexity was positively associated with fish catch (0.96) and CPUE (0.66). These results can support management strategies, from regional to large scales, by reinforcing the relevance of PAs in clear-water rivers and showing the influence of landscape on fish catches. Our collaboration with fishers provided robust baseline data that can be used to inform inclusive, precautionary, and adaptive policies for conservation of threatened rivers.

The coastal area of Padang City, particularly Ulak Karang Selatan, possesses abundant fisheries resources. However, local fishing communities still face challenges such as limited product innovation, weak branding, inadequate financial management skills, and minimal use of digital marketing. This community service program aimed to empower the Kelompok Pengolah dan Pemasar (POKLAHSAR) through training in fisheries product innovation, particularly the processing of fish into value-added products such as dim sum and batagor. The program was complemented by capacity-building activities in digital marketing, business financial management, and the design of product logos and packaging. The activities were conducted using a participatory approach through counseling, demonstrations, hands-on practice, and evaluation. The results indicated a significant improvement in participants’ skills, particularly in production, financial recording, and digital marketing strategies. Furthermore, participant evaluation revealed a high level of satisfaction, with an average achievement of over 90% across all indicators. This program not only enhanced the economic capacity of fishing households but also contributed to the achievement of the Sustainable Development Goals (SDGs).

Fisheries using bottom-towed fishing gears are a localised pressure that causes physical disturbance to the seabed habitats. To meet the requirements of ecosystem-based fisheries management, it is essential to have high-resolution remote electronic monitoring fisheries data with appropriate spatial resolution to evaluate the direct impact of fishing activities. The resolution of the fishery data must align with both the spatial operational characteristics of the fishery and the conservation objectives under review, such as habitat and species distribution. Here we show how Black Box (BB) data logging actual fishing activity locations can be used to assess the direct footprint of bivalve fishing on eelgrass meadows. Our findings demonstrated that i) Actual logged fishing tracks (BB data) can document no overlap with known observations of eelgrass meadows, while low-resolution fisheries data (VMS data) showed an overlap with eelgrass meadows. Furthermore, the VMS data from a few vessels showed 2.5 greater overlap with areas assessed as suitable for eelgrass compared to actual tracks logged by the BB from the entire fleet. These findings emphasise the importance of equipping fishing vessels with electronic monitoring systems that capture actual fishing activity locations. This enables us to accurately track the areas impacted by fisheries, and when combined with high-resolution habitat monitoring, it facilitates ecosystem-based fishery management and ensures the achievement of nature conservation goals.

This study investigates the translation of denotative and metonymic Abu- and Umm-animal and plant folk names by Copilot (MC) and DeepSeek (DS) using three prompts (no-domain, with domain and metonymic), the strategies they use, causes of errors, and whether students and specialists can depend on AI in translating Abu-names. Results showed that in the denotative Abu-names, DS gave higher correct equivalents in response to the no-domain prompt (51% by DS vs 46% by MC) and the domain prompt (51% by DS vs 44% by MC). The equivalent animal’s name was directly given without any translation, transliteration or annotation (أبو مَركوب Shoebill). Both gave identical responses to 40% of the denotative items. In the metonymic name list, both MC and DS failed to identify the exact animal or plant type to which each Abu-metonyms in response to all 3 prompts. Both gave fewer than 3% correct responses to all 3 prompts. Similar equivalents were given to each Umm-name in response to the three prompts, of which MC gave 30% correct and 70% faulty equivalents with different wording. By contrast DS failed to give correct responses to all items in the no-domain prompt, 97%-99% faulty responses to the domain prompt & metonymic prompt, respectively. Regarding faulty strategies, MC translated Abu to “father” (46%); translated Abu + Noun semantically without “father” (أبو الشّبت *Dill beetle) (32%); made faulty guesses (أبو حُدَيج Possibly a local fish or bird name) (17%), transliterating the noun following Abu in 57% (البحتري أبو Father of Al Buhturi) and translating it (43%) (إبن جلي Son of Clarity). Both MC and DS considered metonymic names as personal names (55% by MC and 95% by DS). DS translated أبو Abu to “father” in 27%. In the annotation, DS gave the genus, not the specific animal implied (أبو الشّبت *Dill Father (a type of beetle). DS rendered “lizard” as the referent animal/plant in all items in response to the metonymic prompt. The study gives causes of the AI errors and recommendations for improving AI performance in translating Abu- and Umm-animal and plant names to English.

This study presents the age structure and growth patterns, spatial and seasonal distribution, and anthropic interactions of franciscana dolphin Pontoporia blainvillei, using data from stranded individuals through a nine-year effort of daily monitoring on the northern coast of São Paulo, an important area within the Franciscana Management Area (FMA IIa). The main results are compatible with the literature for the region, i.e., asymptotic growth, sexual maturity, and seasonality of stranding events, except with a higher frequency of calves and adults on the north coast of São Paulo than observed in other areas. Our results strengthen the relevance of this FMA as a region with a high occurrence of franciscana strandings, in addition to highlighting the high occurrence of the species’ interaction with gillnet fishing. Approximately 60% of registered individuals presented evidence of fishing interactions. Ubatuba was the area with the highest concentration of events, underlining the need for studies on carcass drift dynamics, population structure, and local fishing, to determine the mortality cause of this species and the significant fishing threat locations.

This study investigates the reproductive biology of Twait Shad (Alosa fallax) in the coastal waters of Latakia Governorate, Syria. Fish samples (1,200 specimens) were collected using local fishing methods (Gillnets and Purse nets) from October 20, 2021, to September 14, 2023. The total length of the sampled fish ranged from 10.4 to 21 cm, with an average of 14.27 cm ± 3. The studied population consisted of males, who outnumbered females, comprising 59.4% and 40.6%, respectively. The reproductive study showed that A. fallax spawns in Syrian marine waters from April to September, with a single peak in May for both sexes. The highest gonad somatic index (GSI%) values were recorded in May. The length at first sexual maturity was 17.1 cm for males and 19.1 cm for females. The hepatosomatic index (HSI%) reached its highest values during the first year of the study, in October 2022 (1.91 ± 1.01), and in September 2023 (3.92 ± 3.05).

The community service program in Boyolali Regency aims to increase the productivity of the fisheries sector through assistance with laserpuncture technology, the application of microdiet and natural feed, and the production of synbiotics. The methods used include counseling and direct practice involving more than 40 local fish farmers. The results of the program show that the application of laserpuncture and nutritional engineeringthrough microdiet and synbiotics tecknology are increase fish growth. Participation and positive responses from the community show high enthusiasm for new technology which has a direct impact on productivity and the local economy. It is hoped that this program can be implemented independently in sustainable fisheries businesses

ABSTRACT Anaesthetic agents play a crucial role in minimizing stress in fish and other animals while also enhancing animal welfare and ensuring proper care during routine handling procedures. The present study investigated the anaesthetic efficacy of clove stem powder (Syzygium aromaticum) on Redbreast tilapia (Coptodon rendalli) juveniles sourced from a local fish farm. The juveniles with an average weight of 39.68 ± 3.78 g, were exposed to varying concentrations (1, 3, 5, 7, 10 and 12 g/L) of clove stem powder in triplicate tanks under similar water conditions. The temperature was maintained at 21 ± 0.5°C, pH at 6.5 ± 0.2, and dissolved oxygen at 7.4 ± 0.1 mg/L. the induction and recovery times were carefully recorded using digital stopwatches. Results indicated a concentration-dependent effect. Higher clove stem powder concentrations resulted in significantly shorter induction times (P < 0.05). Conversely, recovery time exhibited a polynomial correlation with increasing concentration. The induction times varied from 10.46 ± 0.67 to 2.44 ± 0.49 min, while the recovery times ranged from 3.77 ± 0.69 to 19.76 ± 1.40 min, corresponding to the lowest and highest concentrations, respectively. Importantly, all fish displayed normal behaviour after the experiment and there was no observed mortality.

The decline in fish stocks, resulting from habitat degradation and overfishing, has become a significant threat to the sustainability of fisheries in Indonesia. One of the efforts to support ecosystem recovery and improve fishermen’s catches is the application of artificial fish apartments. This study aims to analyse the implementation process and effectiveness of artificial fish apartments in the waters around the Tanjung Jati B Power Plant in Jepara. The programs were carried out through a participatory approach with local fishing communities, including socialization, scuba diving training, concrete module construction, installation, and evaluation. A total of five artificial fish apartment units were installed at two sites, namely Karang Pringitan (3 units) and Karang Ketapang (2 units). Evaluation three months after installation showed an increase in fish communities, with 16 species recorded at Karang Pringitan and 9 species at Karang Ketapang. These results confirm that artificial fish apartments can serve as new habitats for pelagic and target fish species and have the potential to support the sustainability of local fisheries.

The decline in fish stocks, resulting from habitat degradation and overfishing, has become a significant threat to the sustainability of fisheries in Indonesia. One of the efforts to support ecosystem recovery and improve fishermen’s catches is the application of artificial fish apartments. This study aims to analyse the implementation process and effectiveness of artificial fish apartments in the waters around the Tanjung Jati B Power Plant in Jepara. The programs were carried out through a participatory approach with local fishing communities, including socialization, scuba diving training, concrete module construction, installation, and evaluation. A total of five artificial fish apartment units were installed at two sites, namely Karang Pringitan (3 units) and Karang Ketapang (2 units). Evaluation three months after installation showed an increase in fish communities, with 16 species recorded at Karang Pringitan and 9 species at Karang Ketapang. These results confirm that artificial fish apartments can serve as new habitats for pelagic and target fish species and have the potential to support the sustainability of local fisheries.

This study aims to examine the construction and design of dragon traps used by fishermen in Insit Village, Tebing Tinggi Barat Sub-district, Meranti Islands Regency, Riau Province. Dragon traps are passive and environmentally friendly fishing gear that have only been used since 2022, primarily targeting shrimp, with bycatch including fish and crabs. The research was conducted over two weeks from August 26 to September 9, 2024, using survey and field observation methods. Data were collected through direct measurements of the fishing gear, interviews with fishermen, and visual documentation. The results showed that the dragon traps have a total length of 15 meters, with the main structure consisting of 36 galvanized iron frames. The trap body is made of polyethene (PE) netting with a mesh size of 0.5 inches, measuring 40 cm in length, 45 cm in width, and 30 cm in height. It has 32 entry holes (ijep) arranged alternately. Other components include two catch-holding chambers measuring 50 cm in length, 38 cm in width, and 25 cm in height, PE binding ropes, and 5-meter-long stakes. The fishing location is in shallow, muddy waters with a depth of 2–3 meters and approximately 150 meters from the shoreline. During the study, the dragon traps caught 120 kg of white shrimp (Penaeus merguiensis) out of a total catch of 149 kg. This indicates that the bubu naga is quite effective in capturing shrimp as its main target species.

ABSTRACTOnce common in Eastern Atlantic and Mediterranean coastal waters, the angelshark (Squatina squatina) has disappeared from 90% of its historical geographic range over the last century. Populations have drastically declined, likely due to the combined effects of overfishing, coastal habitat destruction, and the species' slow life history traits. The island of Corsica remains one of the last Mediterranean refuges for this IUCN Critically Endangered species, underscoring the need for conservation action. Given the difficulty of observing this benthic shark, we employed genomic methods to investigate the fine‐scale spatial genetic structure, genetic diversity, and effective population size. Skin samples were opportunistically collected from accidental bycatch of angelsharks by local fishers in eastern Corsica and genotyped for 9699 Single Nucleotide Polymorphisms. We show that these individuals belong to a single population and exhibit high site fidelity, particularly among females, supporting male‐biased dispersal. Genetic relatedness analyses identified 35 close family relationships, with 42% of sampled individuals showing a close relative. Additionally, we revealed multiple paternity within a single litter, suggesting a polyandrous mating system not previously documented in Squatinidae. The estimated effective population size of 290 individuals (95% CI: 209–453) is concerning given the persistent bycatch of hundreds of angelsharks by local artisanal fisheries during the annual spring reproductive aggregation of Spicara smaris. Protecting these ephemeral breeding colonies would not only benefit angelsharks but also help sustain numerous other threatened elasmobranchs and commercially important fish species (i.e., Zeus faber). Our findings highlight the value of integrating genomic tools into the conservation of elusive marine species. Conservation efforts should focus on reducing bycatch through gear modifications, seasonal fishing restrictions, and preserving estuaries. Studying and protecting this Corsican refuge is of paramount importance, as it could serve as a source population for restoring angelshark populations in formerly abundant areas.

Background: Nutritional problems among adolescents are often attributed to inadequate intake, poor dietary quality, and low levels of physical activity. Adolescents require complete and balanced nutrition to support optimal growth, development, and physical performance. Objective: This study aimed to examine the effect of a snack intervention made from mackerel scads (Decapterus sp) enriched with tuna liver on body composition, hemoglobin levels, and VO₂max among youth football school students. Methods: A one-group pretest-posttest design was used. The study involved 32 football school students aged 13–15 years in Ternate City, selected through purposive sampling. The nutritional content of the 90-gram snack included 14.81 g carbohydrates, 6.21 g total fat, 194.99 kcal energy, 15.09 g protein, 3.09 mg iron, and essential amino acids (0.54 g isoleucine, 0.96 g lysine, and 0.90 g valine). The snack was administered three times per week for 10 weeks. Data collected included dietary intake, body composition, hemoglobin levels, and VO₂max. Data analysis was conducted using Microsoft Excel and IBM SPSS version 25. Results: Muscle mass increased from 14.32% ± 2.38% to 16.86% ± 2.41%, hemoglobin levels rose from 11.37 ± 0.39 g/dL to 11.93 ± 0.54 g/dL, and VO₂max improved from 36.93 ± 4.61 mL/kg/min to 41.84 ± 4.67 mL/kg/min. A slight increase in fat mass was also observed (14.86% ± 2.38% to 15.75% ± 1.94%). These improvements were attributed to the snack’s high content of protein, iron, and essential nutrients, which supported muscle development, hemoglobin synthesis, and aerobic capacity. Conclusion: The local fish-based snack intervention significantly impacted body composition, hemoglobin levels, and VO₂max of adolescent football players.