scholarly journals Filling gaps: fishing, genetics, and conservation of groupers, especially the comb grouper (badejo) (Mycteroperca acutirostris), in SE Brazil (2013-2020)

2021 ◽  
Author(s):  
Alpina Begossi ◽  
Svetlana Salyvonchyk ◽  
Branko Glamuzina ◽  
Alessandro Alves-Pereira ◽  
Carlos Batista ◽  
...  
Keyword(s):  
Fish Species ◽  
Genetic Information ◽  
Fish Populations ◽  
Small Scale ◽  
Fishing Gear ◽  
Small Scale Fisheries ◽  
Mycteroperca Bonaci ◽  
Se Brazil ◽  
Apparent Decrease ◽  
Important Fish

There are large gaps in our knowledge of the biology of important fish consumed by people in tropical countries, which makes conservation difficult. Small-scale fisheries are difficult to study and regulate, especially in countries with no systematic species monitoring. It is even more difficult to estimate the influence of these fisheries on vulnerable fish species and to diagnose possible damage to local fish populations. In this study, 490 individuals of badejo, or comb grouper (Mycteropeca acutirostris), were observed at the Posto 6 fishery in Copacabana, Rio de Janeiro, for the periods of 2013-2014 and 2018-2020. A pattern of decreasing catches was observed for comb grouper. Therefore, provided that the fishing gear and the number of fish have remained the same, the apparent decrease in comb grouper needs to be further investigated. The results provide information regarding the reproduction of comb grouper, with major spawning season around spring (September-December) and additional spawning during April in SE Brazil. Samples from 96 groupers along the coast of Brazil were obtained, and genetic analyses were conducted. The genetic information obtained for grouper species enabled us to determine the relative genetic proximity of M. acutirostris and Mycteroperca bonaci and to obtain information that can be useful for aquaculture and conservation.

scholarly journals OVERFISHING AND OVERCAPACITY SMALL SCALE FISHERIES IN SEMARANG CITY

2019 ◽  
Vol 11 (2) ◽  
pp. 427-435
Author(s):  
Jamaludin Malik ◽  
Achmad Fahrudin ◽  
Dietriech Geoffrey Bengen ◽  
Taryono Khodiron
Keyword(s):  
Sustainable Management ◽  
Maximum Sustainable Yield ◽  
Utilization Rate ◽  
Small Scale ◽  
Fishing Gear ◽  
Catch Per Unit Effort ◽  
Small Scale Fisheries ◽  
Surplus Production ◽  
Capacity Level ◽  
The Status

Fisheries in Semarang City are dominated by small-scale fisheries. This is indicated by the use of the largest fishing fleet of 10 gross tons operating near the coast. This study aims to analyze the status of small-scale fisheries in Semarang City for sustainable management. Sustainable management is management that guarantees the availability of natural resources and environmental services for future generations. The study was conducted for three months, namely September-November 2018 in the coastal waters of Semarang City, which was part of the Fisheries Management Region (WPP) 712. The method used in this study is the analysis of time series surplus production, namely data from the catch (ton/year) and the number of fishing gear (unit) within 10 years (2007-2016), to calculate the catch per-unit effort (CPUE), maximum sustainable yield (MSY), optimum effort (fopt), utilization rate (TP) and capacity level (TK). This study was obtained results of a downward trend in CPUE; the existing fishery catch or production in 2016 has exceeded the MSY value is 479 tons/year (Schaefer) and 439.11 tons/year (Fox); utilization rate of more than 100% which is 108-127% (Schaefer) and 118-138% (Fox), so that small-scale fisheries in Semarang City are at the level of over-exploited. Based on the fopt analysis, the number of fishing gear used (fexisting) has exceeded the optimum effort with a fishing capacity exceeding 100%, so that small-scale fisheries in Semarang City have experienced overcapacity.

scholarly journals Assessment of a small-scale fishery: Lane Snapper (Lutjanus synagris) using a length metric method

2020 ◽  
Author(s):  
Liliana Sierra Castillo ◽  
Masami Fujiwara
Keyword(s):  
Small Scale ◽  
Fishing Gear ◽  
Optimal Length ◽  
Limited Availability ◽  
Small Scale Fisheries ◽  
Catch Data ◽  
Gear Selectivity ◽  
Fishing Gear Selectivity ◽  
High Level

ABSTRACTSmall-scale fisheries are hard to assess because of the limited availability of data. Therefore, a method requiring easy-to-obtain catch-data is important for the assessment and management of small-scale fisheries. The objectives of this study were to assess the effect of fishing gear selectivity on a length-based metric method proposed by Froese by estimating three indicators using catch-data from Lane Snapper (Lutjanus synagris) collected in Honduras. These indicators are (1) the percentage of mature individuals in the catch, (2) the percentage of fish within the range of estimated optimal lengths to be captured and (3) the percentage of fish larger than the optimal length. These indicators determine the level of overfishing. The indicators were estimated separately for catchdata corresponding to gillnets, and each indicator was estimated with and without selectivity correction. Selectivity and mesh sizes of the fishing gear had a major impact in the estimation of indicators 1 and 2. As for indicator 3, it consistently showed a high level of exploitation. The three estimated indicators suggested that the Lane Snapper fishery in Honduras, is experiencing overfishing. Overall, the method proposed by Froese appears to be promising for the assessment of small-scale fisheries, but it should be used cautiously.

Length–weight relationships of 12 marine fish species from the Pacific coast of Guatemala associated with small‐scale fisheries

2020 ◽  
Vol 36 (6) ◽  
pp. 863-865
Author(s):  
Juan Carlos Hernández‐Padilla ◽  
Norberto Capetillo‐Piñar ◽  
Fernando Aranceta‐Garza ◽  
Josué Alonso Yee‐Duarte ◽  
Nurenskaya Vélez‐Arellano ◽  
...  
Keyword(s):  
Marine Fish ◽  
Fish Species ◽  
Pacific Coast ◽  
Small Scale ◽  
Marine Fish Species ◽  
Small Scale Fisheries ◽  
The Pacific

scholarly journals Juveniles and undersized fish in small-scale fisheries: gillnets are not less implied than trawling

2021 ◽  
Vol 35 (2) ◽  
Author(s):  
Paulo De Tarso da Cunha Chaves
Keyword(s):  
Fish Species ◽  
Small Scale ◽  
Commercial Fishing ◽  
Southern Brazil ◽  
Size Selectivity ◽  
Study Region ◽  
Small Scale Fisheries ◽  
Fish Catch ◽  
Fishing Resources ◽  
Lower Size

Of particular concern in commercial fishing catch is 'size bycatch', i.e., the death of early stages of resources that would reach a marketable value when they turn into adults. This event is frequently associated with trawling because of the lower size selectivity of this gear as compared to gillnets. However, this is expected when small-scale fisheries (SSF) employ gillnets simultaneously in setnets + driftnets that mix multiple mesh sizes. This work analyzes fishing captures and compares characteristics of fish catch from gillnets and trawlers with respect to size at first maturation, legal size of capture, and expected discards. Data were obtained from 2007-2021 for SSF in Southern Brazil. A total of 112 fish species were represented in the data. Gillnets exploited fewer species than trawlers; however, most of these constitute fishing resources in the study region. Of the 19 species whose maturation size is known, nine occurred in gillnets as juveniles, and of the 14 species for which the legal size of capture is established, seven occurred in gillnets in prohibited sizes. Gillnets and trawlers presented size bycatch and affected different species between them, with four resources that were present in bycatch from both gillnets and trawlers. The broad range of mesh sizes employed by SSF warns of the discarding of undersized captures, and stresses the importance of policies addressing gillnet management.

scholarly journals STRATEGI PENINGKATAN PENDAPATAN NELAYAN SKALA KECIL BERKELANJUTAN MELALUI PEMANFAATAN POTENSI GURITA (Octopussp) DI KABUPATEN SIMEULUE PROPINSI ACEH

2020 ◽  
Vol 7 (1) ◽  
pp. 13
Author(s):  
Teuku Amarullah ◽  
Syarifah Zuaridah ◽  
Mohamad Gazali
Keyword(s):  
Research Method ◽  
Sampling Method ◽  
Swot Analysis ◽  
Small Scale ◽  
Marine Resources ◽  
Fishing Gear ◽  
Internal Factor ◽  
Small Scale Fisheries ◽  
Fisheries Resources ◽  
Descriptive Method

 Simeulue Islands are the farthest area in West Indonesia that have potency in fisheries and marine science sectors. One of the marine resources from Simeulue Island are Octopus. The octopus price in the market were prospective than other fisheries commudity. However, we have no strategy to increase the Octopus sustainability. Thus, the research about the socio-economic were very important. The aim of this research was to determine the increasing strategy of small scale fishermen sustainability through the utilization of Octopus potency at Simeulue Island. The research method by using descriptive method with sampling method that used accidental sampling.  Subsequently, those samples were analysed by using SWOT Analysis. The result showed that the internal factor in our study are togertherness in capture operational system with value as much as 0,58. Moreover, the weakness generated the lack attention from institutional as much as 0,31. In external factors showed the opportunity from fisheries resources abundantly as much as 0,61. However, the threats showed mostly local fishermen catch the fisheries resources by using unfriendly fishing gear. According to the scoring I  grand matrix of small scale fisheries in Simeulue Islands. Thus, this grand strategy in the first kuadran. It means that the small scale fisheries have high opportunity for developing with utilize the strength and grab the opportunity.                                                                                      Keywords :small scale, fisheries, octopus, Simeulue

scholarly journals Assessment of a small-scale fishery: Lane Snapper (Lutjanus synagris) using a length metric method

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0233479
Author(s):  
Liliana Sierra Castillo ◽  
Masami Fujiwara
Keyword(s):  
Small Scale ◽  
Fishing Gear ◽  
Optimal Length ◽  
Gill Nets ◽  
Limited Availability ◽  
Small Scale Fisheries ◽  
Catch Data ◽  
Gear Selectivity ◽  
Fishing Gear Selectivity ◽  
High Level

Small-scale fisheries are hard to assess because of the limited availability of data. Therefore, a method requiring easy-to-obtain catch-data is important for the assessment and management of small-scale fisheries. The objective of this study was to assess the effect of fishing gear selectivity on a length-based metric method proposed by Froese by estimating three indicators using catch-data from Lane Snapper (Lutjanus synagris) collected in Honduras. These indicators are (1) the percentage of mature individuals in the catch, (2) the percentage of fish within the range of estimated optimal lengths to be captured, and (3) the percentage of fish larger than the optimal length. These indicators determine the level of overfishing. The indicators were estimated separately for catch-data corresponding to gill nets, and each indicator was estimated with and without selectivity correction. Selectivity and mesh sizes of the fishing gear had a major impact on the estimation of indicators 1 and 2. As for indicator 3, it consistently showed a high level of exploitation. The three estimated indicators suggested that the Lane Snapper fishery in Honduras is experiencing overfishing. Overall, the method appears to be promising for the assessment of small-scale fisheries, but it should be used cautiously.

scholarly journals Occurrence of larvae of trypanorhynch cestodes in snappers (Lutjanidae) from northeast Brazil

2018 ◽  
Author(s):  
André Mota Alves ◽  
Geza Thais Rangel e Souza ◽  
Ricardo Massato Takemoto ◽  
Luiz Eduardo Roland Tavares ◽  
Cláudia Moura de Melo ◽  
...  
Keyword(s):  
Fish Species ◽  
Food Product ◽  
Small Scale ◽  
Zoonotic Potential ◽  
Northeast Brazil ◽  
Small Scale Fisheries ◽  
Body Of Knowledge ◽  
New Findings ◽  
Heavy Loads ◽  
Northeast Coast

Abstract Three species of snappers from artisanal, small-scale fisheries were examined for the presence of parasites. A total of 139 lutjanid fish were collected: 69 specimens of Lutjanus analis, 47 specimens of Lutjanus vivanus, and 23 specimens of Lutjanus synagris. Encysted plerocercoid of trypanorhynch cestodes found at necropsy in the viscera of snappers were sampled for parasitological analysis. These plerocercoid larvae belong to the genera Floriceps, Pseudogrillotia , and Oncomegas. Although these parasites do not have any zoonotic potential, fish with heavy loads of plerocercoids are rejected during inspection as they compromise meat hygiene. Our findings suggest that light larval cestode infections in lutjanids would not lead to consumer rejection of the food product. The occurrence of Floriceps sp. in L. analis and in L. synagris, of Pseudogrillotia sp. in L. vivanus and in L. synagris , and of Oncomegas sp. in L. synagris are new findings in these fish species. These parasites are new to these fish species and have not been reported in snappers from the northeast coast of Brazil. The results contribute to the existing body of knowledge about the parasitic fauna of fish and its distribution along the coastline of Brazil.

scholarly journals THE PROVISION ON SEAGRASS ECOSYSTEM SERVICES TO SMALL-SCALE FISHERIES ACTIVITY IN EASTERN COASTAL OF BINTAN ISLAND, RIAU ISLANDS

2018 ◽  
Vol 2 (1) ◽  
pp. 29-40
Author(s):  
M. Nur Arkham
Keyword(s):  
Ecosystem Services ◽  
Fish Species ◽  
Stable Condition ◽  
Small Scale ◽  
Fish Community Structure ◽  
Small Scale Fisheries ◽  
Seagrass Ecosystem ◽  
Catchment Areas ◽  
Study Sites ◽  
Index Value

The seagrass ecosystem has the same role as other ecosystem in improving coastal community fishery business. The purpose of this study is to assess the provision of seagrass ecosystem services to small fishing activities in the study sites. The research was conducted in Malang Village Meeting and Berakit from September to November 2014. Spatial distribution of fish species resources and small fishing catchment areas at study sites were located near the coast in each study village. The activity of catching small fishermen by utilizing the existence of seagrass ecosystem is reflected from the resources of fish species that are obtained and marketed to meet their needs. Fish community structure associated with seagrass from small fisherman catch in Malang Village Meeting based on index value of diversity (H ') and uniformity (E) of 2.58 and 0.93 higher than that of Desa Berakit that is 1.77 and 0.65. This value indicates that the keaganagaman in Malang Village is Medium and the community is in stable condition. While in the village of Berakit shows low diversity and community in unstable conditions. While the value of dominance index (C) of each village is low with the value of each village of 0.09 and 0.31. Keywords: seagrass ecosystem services, small-scale fisheries, and Eastern Coastal of Bintan

scholarly journals A Review on Ray Capture According to Fishing Gear Worldwide

2021 ◽  
Vol 13 (1) ◽  
pp. 68
Author(s):  
Nur Arina Hayati Mohidin ◽  
Sukree Hajisamae ◽  
Mazlan Hashim ◽  
Nik Aziz Nik Ali ◽  
Mohd Fazrul Hisam Abd Aziz
Keyword(s):  
Coral Reef ◽  
Large Scale ◽  
Bottom Trawl ◽  
Purse Seine ◽  
Small Scale ◽  
Fishing Gear ◽  
Artisanal Fishery ◽  
Gill Nets ◽  
Small Scale Fisheries

HighlightRay capture worldwide using variety fishing gear.Efficiency of fishing gear used in capture ray species among countries.The maturation size for female and male ray according to species present.Bycatch issues of elasmobranch in small and large scale fisheries.Suitable fishing gear to capture ray species at particular country.AbstractA coral reef is one of the important ecosystems. However coral Gillnets are usually used as a fishing gear by an artisanal fishery in Malaysia. This gear is commonly used by most countries. This paper discussed the rays capture worldwide by using a variety of fishing gear and also bycatch issues that commonly happen. The efficiency of the fishing gear used in capture ray species is compared and discussed among the countries. This paper distinguishes the maturation size for the female and male ray according to the species presence. The bycatch scenario is also discussed as the majority of this elasmobranch (shark and ray) which is caught as bycatch in both small scale fisheries (gill nets, long lines and hooks) and large scale fisheries (bottom trawl and purse seine). This paper explains the suitable type of fishing gear to use to capture ray species in a particular country.

scholarly journals PERIKANAN PUKAT CINCIN TUNA SKALA KECILYANG BERBASIS DI PELABUHAN PERIKANAN PANTAI (PPP) TAMPERAN (Small Scale Tuna Purseseine Fisheries Based in Tamperan Fishing Port)

2016 ◽  
Vol 3 (2) ◽  
pp. 161
Author(s):  
Hety Hartaty ◽  
Budi Nugraha ◽  
Bram Styadji
Keyword(s):  
Direct Observation ◽  
Measurement Methods ◽  
Purse Seine ◽  
Fishing Ground ◽  
Small Scale ◽  
Fishing Gear ◽  
Vessel Size ◽  
Small Scale Fisheries ◽  
Tuna Fisheries ◽  
Purse Seine Fishery

<p>ABSTRACT<br />In general, fisheries in Indonesia is still dominated by small-scale fisheries, one of themis the purse seine fishery based in Tamperan Fishing Port. This study aims to determine aspects of purse seine fishery based on Tamperan Fishing Port such as vessel size and fishing gear, FADs , fishing ground and catches. The study was conducted in 2012 in Tamperan Fishing Port with measurement methods and direct observation and interviews with owners, skippers and crew. The results showed that the vessel of small-scale tuna purse seine fishing based in Tamperan Fishing Port have tonnage between 28-45 GT and made of wood with length 17.21-28 m, width 6-7 m, and depth 2-3 m. Nets is used have length between 250-300 m and width 8-10 m. Fishing ground is FADs at coordinates 10º-12º S and 100º-110º E, 60-100 miles from the Pacitan Bay with distance to the location of FADs about one day. The catch is dominated by skipjack about 57.27%, followed by scad26.31% and juvenile yellowfin 10.05%.</p><p><br />Keywords: Purse seine, small scale tuna fisheries, Tamperan</p><p>-------</p><p>ABSTRAK</p><p>Secara umum, perikanan tangkap di Indonesia masih didominasi oleh usaha perikanan skala kecil, salah satunya adalah nelayan pukat cincin yang berbasis di PPP Tamperan. Penelitian ini bertujuan untuk mengetahui aspek penangkapan perikanan pukat cincin yang berbasis di PPP Tamperan berupa ukuran kapal dan alat tangkap, rumpon, daerah penangkapan dan hasil tangkapan. Penelitian dilakukan pada tahun 2011 di PPP Tamperan Pacitan dengan metode pengukuran dan pengamatan langsung di lapangan serta wawancara dengan nelayan pemilik, nakhoda dan awak kapal. Hasil penelitian menunjukkan bahwa armada pukat cincin perikanan tuna skala kecil yang berbasis di PPP Tamperan memiliki ukuran tonase antara 28-45 GT dan terbuat dari kayu dengan ukuran panjang antara 17,21-28 m, lebar 6-7 m, dan dalam 2-3 m. Jaring yang digunakan memiliki panjang antara 250-300 m dan lebar 8-10 m dengan menggunakan rumpon. Daerah penangkapan berada pada koordinat 10º-12º LS dan 100º-110º BT dan berjarak sekitar 60-100 mil dari Teluk Pacitan dengan lama perjalanan menuju lokasi rumpon sekitar 1 hari. Hasil tangkapan didominasi oleh cakalang sebesar 57,27%, diikuti oleh layang 26,31% dan yuwana madidihang 10,05%.</p><p><br />Kata kunci: Pukat cincin, perikanan tuna skala kecil, Tamperan</p>

Sign in / Sign up

Export Citation Format

Share Document