Fisheries and conflicts in Guanabara Bay, Rio de Janeiro, Brazil

Despite the magnitude of domestic and industrial pollution, fishery yield registered in several landing points at Guanabara Bay, between April 2001 and March 2002 was slightly over 19,000 tons, corresponding to a value of US$ 4.8 million. When considered only the fish directed to the food market, the total catch amounted to about 6,300 tons and a value of US$ 3.7 million. Only a few fish species reached expressive densities compatible with commercial fisheries. Among small pelagic fish, Atlantic anchoveta and Brazilian sardinella were the dominant species, while in terms of demersal fish, croakers, mullets and catfishes comprised the main part of the catch. The absence of landing data previous to the spilling of 1.3 million liters of oil in January 2000 led to claims by fishermen representative organizations of values corresponding to about 50 years of fish harvest in the bay. Possibly, a data collection network could be established in a participative way with the main fishermen local associations. The relatively stabilized fisheries in the bay suggested that reasonable inferences could be made, without, necessarily having a complete coverage of all landing points.

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Analysis of Income Disparity of Coastal and Non-Coastal Communities in Banten Province, Indonesia

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2021/v13i230260 ◽

2021 ◽

pp. 8-18

Author(s):

Nisfi Setiawati ◽

Achmad Rizal ◽

Isni Nurruhwati ◽

Asep Agus Handaka Suryana

Keyword(s):

Demersal Fish ◽

Pelagic Fish ◽

Coastal Areas ◽

Coastal Communities ◽

Survey Method ◽

Income Disparity ◽

Small Pelagic Fish ◽

West Java ◽

A Value ◽

Fish Group

This study aims to analyze the large income disparity in coastal and non-coastal areas in Banten Province and to analyze whether the fisheries sub-sector has become the economic base in Banten Province in 2015 – 2019. January until May 2021. The method is carried out by survey method then analyzed quantitatively and presented descriptively. The data of this study were sourced from secondary data and primary data. Data were obtained from BPS Banten Province, BPS West Java Province, Marine and Fisheries Service Banten Province, Marine and Fisheries Service West Java Province and through questionnaires from coastal and non-coastal communities. Data analysis includes analysis of Williamson index, Gini coefficient and Location Quotient (LQ). based on the results of research conducted, it can be concluded that the income disparity in the coastal areas of Banten Province is greater than in the non-coastal areas. The Gini ratio analysis shows that the value of the Gini ratio has decreased from year to year, which means that income distribution is more evenly distributed until in 2019 it reaches 0. The fisheries sector in Banten Province is included in the non-base sector because it has a value of 0.5671. Production of catch commodities that get superior commodities: small pelagic fish group (mean LQ=1.81) and demersal fish group (mean LQ=0.84). The fisheries sector in Banten Province is included in the non-base sector because it has a value of 0.5671. Production of catch commodities that get superior commodities: small pelagic fish group (mean LQ=1.81) and demersal fish group (mean LQ=0.84). The fisheries sector in Banten Province is included in the non-base sector because it has a value of 0.5671. Production of catch commodities that get superior commodities: small pelagic fish group (mean LQ=1.81) and demersal fish group (mean LQ=0.84).

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Productivity and Distribution of Fish Aggregation Devices (FADs) in Outer Ambon Bay Waters, Indonesia

Omni-Akuatika ◽

10.20884/1.oa.2021.17.1.777 ◽

2021 ◽

Vol 17 (1) ◽

pp. 19

Author(s):

Delly Dominggas Paulina Matrutty ◽

Jacobus Bunga Paillin ◽

Stany Rachel Siahainenia ◽

Welem Waileruny ◽

K Rutumalessy

Keyword(s):

Field Observation ◽

Dominant Species ◽

Average Distance ◽

Pelagic Fish ◽

Species Number ◽

Catch Per Unit Effort ◽

Small Pelagic Fish ◽

Middle Group ◽

Fish Aggregation ◽

Distribution Of Fish

Distribution of small pelagis fish in FADs, and produktivity of FADs in AmFADs are usually used by fishermen to concentrate fish for an efficient catching activity. However, the number, distance, and distribution in the waters need to be assessed in relation to the productivity of the FADs in order to maintain the sustainability. This study was aimed to map the distribution of FADs; to analyze the distribution of species, number and size of fish associated with FADs; and to calculate FAD productivity based on distribution in the Outer Ambon Bay waters. Data was obtained by observation and interview. Field observation, including: coordinates and number of FADs, species, number and size of fish. The distance and distribution of FADs, was mapped using software (Argis web), while the productivity of FADs was analyzed base on catch per unit effort (CPUE). The result, FAD in Outer Ambon Bay waters was found 25 unit and the average distance of FAD was obtained 0.47 nautical miles, and the placement of the device was irregular. The placement pattern of FADs were generally straight to coastline. Small pelagic fish was found 7 species and the 5 of the dominant species were obtained Decapterus sp, Selar crumenophthalmus, Rastreliger sp, Sardinella sp and Selaroides sp. The species were unevenly spread at each FAD with quite varied sizes. FAD productivity showed that the highest productivity was found in the middle group FAD at Ambon Bay waters.Keywords: Distance, size, small pelagis, productivitybon Bay

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Utilization Of Underwater Submersible Light Led To Fish Swimming Activity On Fixed Liftnet Operated In Mangrove

Agrikan Jurnal Agribisnis Perikanan ◽

10.29239/j.agrikan.13.2.493-499 ◽

2020 ◽

Vol 13 (2) ◽

pp. 493-499

Author(s):

Husni Angreni ◽

Ibnu Malkan Hasbi ◽

Jumrawati Jumrawati

Keyword(s):

Operating Time ◽

Demersal Fish ◽

Pelagic Fish ◽

Assistive Technologies ◽

Swimming Activity ◽

Fishing Gear ◽

Fish Swimming ◽

Small Pelagic Fish ◽

The Subject ◽

Large Groups

Fixed chart fishing focuses on utilization of light aids for attract fish. Underwater submersible light ((Lacuda) LED is one of the assistive technologies that are environmentally friendly, be the subject of study in determining the characteristics of the movement or fish swimming groupings based on the operating time of the fishing gear and can be detected by hydroacoustic devices. The research method used is descriptive exploratory method by participating in fishing operations in the waters of Laikang Bay from April to September 2020. The results of the observations made at 18:00-05:00 Wita every trip shows that fish swimming activity after midnight tends to be higher than before midnight and at midnight. Based on the hydroacoustic detection of fish swimming activity in the form of solitary, medium and large groups at an average depth of 2-6 meters at 03:00-05:00 Wita. The amount of catch in hauling I is 138,4 Kg while hauling II is 157,3 Kg. The type of catch is small pelagic fish and demersal fish.

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Climate Change and Small Pelagic Fish

10.1017/cbo9780511596681 ◽

2001 ◽

Cited By ~ 48

Keyword(s):

Climate Change ◽

Pelagic Fish ◽

Small Pelagic Fish

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The box-balance model: a new tool to assess fish larval survival, applied to field data on two small pelagic fish

Marine Ecology Progress Series ◽

10.3354/meps13369 ◽

2020 ◽

Vol 650 ◽

pp. 289-308 ◽

Cited By ~ 2

Author(s):

V Raya ◽

J Salat ◽

A Sabatés

Keyword(s):

Field Data ◽

Fish Larvae ◽

Larval Growth ◽

Warming Trend ◽

Mortality Rates ◽

Larval Survival ◽

Pelagic Fish ◽

Balance Model ◽

Small Pelagic Fish ◽

Mesoscale Structures

This work develops a new method, the box-balance model (BBM), to assess the role of hydrodynamic structures in the survival of fish larvae. The BBM was applied in the northwest Mediterranean to field data, on 2 small pelagic fish species whose larvae coexist in summer: Engraulis encrasicolus, a dominant species, and Sardinella aurita, which is expanding northwards in relation to sea warming. The BBM allows one to quantify the contribution of circulation, with significant mesoscale activity, to the survival of fish larvae, clearly separating the effect of transport from biological factors. It is based on comparing the larval abundances at age found in local target areas, associated with the mesoscale structures (boxes), to those predicted by the overall mortality rate of the population in the region. The application of the BBM reveals that dispersion/retention by hydrodynamic structures favours the survival of E. encrasicolus larvae. In addition, since larval growth and mortality rates of the species are required parameters for application of the BBM, we present their estimates for S. aurita in the region for the first time. Although growth and mortality rates found for S. aurita are both higher than for E. encrasicolus, their combined effect confers a lower survival to S. aurita larvae. Thus, although the warming trend in the region would contribute to the expansion of the fast-growing species S. aurita, we can confirm that E. encrasicolus is well established, with a better adapted survival strategy.

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Small pelagic fish responses to fine-scale oceanographic conditions: implications for the endangered African penguin

Marine Ecology Progress Series ◽

10.3354/meps12089 ◽

2017 ◽

Vol 569 ◽

pp. 187-203 ◽

Cited By ~ 11

Author(s):

AM McInnes ◽

PG Ryan ◽

M Lacerda ◽

J Deshayes ◽

WS Goschen ◽

...

Keyword(s):

Pelagic Fish ◽

Fine Scale ◽

Small Pelagic Fish ◽

African Penguin ◽

Oceanographic Conditions

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PEMETAAN RANTAI NILAI IKAN PELAGIS KECIL DI KOTA AMBON

PAPALELE (Jurnal Penelitian Sosial Ekonomi Perikanan dan Kelautan) ◽

10.30598/papalele.2018.2.1.15 ◽

2018 ◽

Vol 2 (1) ◽

pp. 15-21

Author(s):

Yolanda MTN Apituley ◽

Dionisius Bawole ◽

Imelda KE Savitri ◽

Friesland Tuapettel

Keyword(s):

Value Chain ◽

Secondary Data ◽

Pelagic Fish ◽

Value Chain Analysis ◽

Small Pelagic Fish ◽

Fresh Fish ◽

Chain Analysis ◽

The Government ◽

Market Distance ◽

Role Of The Government

This research was taken in Ambon (Latuhalat and Laha) and in Central Maluku Regency (Waai) in May – July 2018. It was aimed at mapping the value chain of small pelagic fish in Ambon through: 1) mapping of product, financial and information flows and 2). analysis of percentage distribution of small pelagic fish caught. The data used in this study was primary and secondary data, and analyzed by using value chain analysis. The results show that small pelagic fish marketing chain in Ambon consisted of six models with five actors. Each chain is formed due to the conditions and situation of market, resulted by the influencing of catches of fishermen and traders' capital. The broker plays an important role in marketing small pelagic fish in the market and obtaining 10% of the fishermen's catch that can be distributed, both to retailers and cold storage. Fish caught by the fishermen is still fresh in general when arrives in the consumers, because the fishing area is not too far, the market distance with the production centers is also quite close and in general fishermen and traders have understood the importance of maintaining product quality. Even so, the role of the Government in providing marketing facilities and infrastructure is needed so that modern market conditions can be applied in marketing fresh fish in Ambon.

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A new look on the morphometric characteristics of Congridae leptocephali from the southern Adriatic Sea

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315421000229 ◽

2021 ◽

pp. 1-5

Author(s):

M. Mandić ◽

I. Leonori ◽

A. De Felice ◽

S. Gvozdenović ◽

A. Pešić

Keyword(s):

Fish Species ◽

Adriatic Sea ◽

Pelagic Fish ◽

Morphometric Parameters ◽

Morphological Features ◽

Morphometric Characteristics ◽

Small Pelagic Fish ◽

Acoustic Surveys ◽

Western Side ◽

Conger Conger

Abstract Anguillid leptocephali of three Congridae species (Conger conger, Ariosoma balearicum and Gnathophis mistax) were caught as bycatch of pelagic trawls during acoustic surveys targeting small pelagic fish species in the southern Adriatic Sea, carried out under the framework of the Italian MEDIAS project (western side) and its extension in the ambit of the FAO AdriaMed project (eastern side). Results refer to the findings of Congridae leptocephali during surveys conducted in 2011, 2014, 2015 and 2016. A total of 25 specimens were caught and analysed (morphological features and pigmentation patterns). Leptocephali of Conger conger were found in the range of 8.4–13.1 cm total length (TL) (between 50 and 132 m depth), Ariosoma balearicum from 9.7–12.2 cm TL (between 50 and 128 m depth) and for Gnathophis mystax in the range from 6.4–11.7 cm TL (between 40 and 79 m depth). The results indicate that the southern Adriatic Pit could be the spawning area of these species in the Adriatic Sea. Present data represent a contribution to existing knowledge about the ecology of leptocephali from the Congridae family in the southern Adriatic Sea, and also indicate the existence of differences in morphometric parameters between different areas, that is, the possibility of the existence of new geographic lines within the genus Ariosoma in the Adriatic Sea.

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Impact of the Strong Downwelling (Upwelling) on Small Pelagic Fish Production during the 2016 (2019) Negative (Positive) Indian Ocean Dipole Events in the Eastern Indian Ocean off Java

Climate ◽

10.3390/cli9020029 ◽

2021 ◽

Vol 9 (2) ◽

pp. 29

Author(s):

Jonson Lumban-Gaol ◽

Eko Siswanto ◽

Kedarnath Mahapatra ◽

Nyoman Metta Nyanakumara Natih ◽

I Wayan Nurjaya ◽

...

Keyword(s):

Indian Ocean ◽

Indian Ocean Dipole ◽

Pelagic Fish ◽

Eastern Indian Ocean ◽

Fish Production ◽

Small Pelagic Fish ◽

Field Surveys ◽

Chl A ◽

Positive Indian Ocean Dipole ◽

The Impact

Although researchers have investigated the impact of Indian Ocean Dipole (IOD) phases on human lives, only a few have examined such impacts on fisheries. In this study, we analyzed the influence of negative (positive) IOD phases on chlorophyll a (Chl-a) concentrations as an indicator of phytoplankton biomass and small pelagic fish production in the eastern Indian Ocean (EIO) off Java. We also conducted field surveys in the EIO off Palabuhanratu Bay at the peak (October) and the end (December) of the 2019 positive IOD phase. Our findings show that the Chl-a concentration had a strong and robust association with the 2016 (2019) negative (positive) IOD phases. The negative (positive) anomalous Chl-a concentration in the EIO off Java associated with the negative (positive) IOD phase induced strong downwelling (upwelling), leading to the preponderant decrease (increase) in small pelagic fish production in the EIO off Java.

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