scholarly journals REPRODUCTIVE BIOLOGY IN GREEN SPINY LOBSTER, PANULIRUS REGIUS (DE BRITO CAPELLO 1864), FROM THE PETITE COTE OF SENEGAL, WEST AFRICA

2020 ◽  
Vol 8 (10) ◽  
pp. 182-195
Author(s):  
Yacinthe Pierre Waly Faye ◽  
◽  
Justin Kantoussan ◽  
Fulgence Diedhiou ◽  
Alpha Oumar Ba ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Spiny Lobster ◽  
The Body ◽  
Small Scale ◽  
Small Scale Fisheries ◽  
Fisheries Resources ◽  
Management Measures ◽  
Cephalothorax Length ◽  
Fisheries Law ◽  
Individual Fecundity

Green spiny lobster is one of the highest economically valued fisheries resources in Senegal. However, knowledge on this species are relatively old and insufficient. To realize this study on reproductive biology of Panulirusregius, sampling has been carried out between April and September 2017 from small-scale fisheries landed catches at the Petite Cote, Senegal. The length at first sexual maturity computed from the body allometric relationship according to the cephalothorax length (CL) was 67.95 mm in females and 67.51 mm in males. The CL at which 50% of the females were mature during the breeding season (CL50) was 94.50 mm. Individual fecundity was between 229,860 and 638,775 eggs depending on CL of individuals. In the catches surveyed, 64% of landed individuals had a total length (TL) less than 200 mm, which is the minimum landing length in accordance with the Senegalese fisheries law. This result indicates the difficulties to apply management measures relative to this fishery, which could compromise its sustainability in Senegalese Petite Cote.

scholarly journals Strategies of the small-scale fisheries on the Central Amazon floodplain

2002 ◽  
Vol 32 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Carlos Edwar de Carvalho FREITAS ◽  
Vandick da Silva BATISTA ◽  
Antonio José INHAMUNS
Keyword(s):  
Hydrological Cycle ◽  
Small Scale ◽  
Good Tool ◽  
Central Amazon ◽  
Small Scale Fisheries ◽  
Fisheries Resources ◽  
Patterns Of Use ◽  
Target Fish ◽  
Catch Composition ◽  
High Level

A multivariate approach was applied to data of small-scale fisheries developed in Central Amazon, using information about catch composition, environment, fishing gear and season of the hydrological cycle. The correspondence analysis demonstrated to be a good tool for the analysis related multispecies fisheries. The analysis identified patterns of use of fisheries resources by the riverine communities, showing the correlation between the environmental factors and the fishing strategy for the capture of target fish species, indicating the high level of empiric knowledge about the environment and fisheries.

An Analysis of Small-Scale Fisheries Management Status by Focusing on Degrading Fisheries Resources in the Sundarbans

2021 ◽  
pp. 189-213
Author(s):  
Indrajit Pal ◽  
Afshana Parven ◽  
Md. Ashik-Ur-Rahman ◽  
Mohammad Sofi Ullah ◽  
Khan Ferdousour Rahman
Keyword(s):  
Fisheries Management ◽  
Small Scale ◽  
Small Scale Fisheries ◽  
Fisheries Resources ◽  
The Sundarbans

scholarly journals Focused small-scale fisheries as complex systems using deep learning models

2021 ◽  
Vol 49 (2) ◽  
pp. 342-353
Author(s):  
Ricardo Cavieses-Núñez ◽  
Miguel A. Ojeda-Ruiz ◽  
Alfredo Flores-Irigollen ◽  
Elvia Marín-Monroy ◽  
Mirtha Lbañez-Lucero ◽  
...  
Keyword(s):  
Deep Learning ◽  
Environmental Variables ◽  
Predictive Power ◽  
Small Scale ◽  
Learning Models ◽  
Small Scale Fisheries ◽  
Productive Activities ◽  
Lack Of Information ◽  
Management Measures ◽  
The Face

Small-scale fishing (SSF) is a relevant economic activity worldwide, so sustainable development will be essential to assure its contributions to food security, poverty alleviation, and healthy ecosystems. However, the wide diversity of fisheries, their complexity, and the lack of information limit the ability to propose/evaluate management measures and plans and their effects on communities and other productive activities. The state of Baja California Sur, Mexico, our study case, ranks as the third place in national fisheries production, possesses SSF fleets, has a wide variety of fisheries that share fishing areas, fishing seasons, and operating units. In this work, assuming SSF as a complex system were proposed deep learning models (DLM) to forecast the catch volumes, evaluate each input variable's importance, and find interactions. Environmental variables and catch fisheries were tested in the DLM to estimate their predictive power. Different DLM structures and parameters to find the optimal model was used. The variables that presented higher predictive power are the environmental variables with R = 0.90. Moreover, when used in combination with the catches from other areas, the performance of R = 0.95 is obtained. Using only the catches, the model has an R = 0.81. This model allows the use of variables that indirectly affect the system and demonstrates a useful tool to assess a complex system's state in the face of disturbances in its variables.

scholarly journals The Importance of Values in Predicting and Encouraging Environmental Behavior: Reflections From a Costa Rican Small-Scale Fishery

2021 ◽  
Vol 8 ◽  
Author(s):  
Astrid Sánchez-Jiménez ◽  
Douglas MacMillan ◽  
Matthias Wolff ◽  
Achim Schlüter ◽  
Marie Fujitani
Keyword(s):  
Fisheries Management ◽  
Behavioral Intentions ◽  
Survey Design ◽  
Environmental Behavior ◽  
Ecosystem Modeling ◽  
Control Treatment ◽  
Small Scale ◽  
Perceived Behavioral Control ◽  
Small Scale Fisheries ◽  
Management Measures

Encouraging people’s pro-environmental behaviors is an objective of Education for Sustainable Development. In the context of small-scale fisheries, unsustainable fishing practices are compromising the integrity of coastal communities and ecosystems. Ecopath with Ecosim (EwE) is an ecosystem modeling software that presents interactions/changes in the food web as a result of fishing. Despite the multiple applications of EwE in fisheries management, it is unknown from a quantitative perspective whether the application of EwE trophic modeling in environmental education processes and management produces effects on norms and ecological beliefs, and if it alters behavioral intentions of the participants receiving ecosystem modeling information. We conducted a behavior change intervention with gillnet fishers in the Gulf of Nicoya, Costa Rica, to compare antecedents of pro-environmental behavior between participants who received an ecosystem-based intervention (lectures containing EwE models; treatment) and those who received lectures that didn’t involve EwE (control). Based on theories of environmental psychology, we used a pre–post survey design, to evaluate changes between control/treatment, and to assess the influence of psychometric constructs and fishing characteristics on the behavioral intentions to support sustainable fishing measures and owning a fishing license (revealed behavior). Personal norms and values were significant at explaining management measures’ support, along with some fishing characteristics (e.g., fishing site). Deliberating about possible future scenarios (via EwE-modeling) helped reduce uncertainties, increasing legitimacy and a perceived behavioral control (PBC) to support measures. Currently, licenses in the Gulf aren’t granted under defined ecological criteria, and although altruistic-biospheric values scored highly before the intervention began, due to mistrust and high illegal-unlicensed fishing, fishers may be underestimating how much others care about the environment. Value-oriented and ecosystem-based interventions may assist to effectively redesign the licensing system and encourage fishers to support sustainable measures. Our research indicates the importance of education interventions that teach about the impacts of fishing in the ecosystem while helping participants to perceive themselves as capable of implementing actions (PBC) and expressing biospheric-altruistic values to restore trust. Redirecting human behaviors to reconnect with ecosystem resilience can be a leverage point for sustainability and for the compliance of small-scale fisheries management measures.

scholarly journals Histology of Tritia mutabilis gonads: using reproductive biology to support sustainable fishery management

2021 ◽  
Vol 34 ◽  
pp. 6
Author(s):  
Alicia Mallet ◽  
Jean-Yves Jouvenel ◽  
Morgane Broyon ◽  
Nelly Pirot ◽  
Benjamin Geffroy
Keyword(s):  
Reproductive Biology ◽  
Fishery Management ◽  
Shell Height ◽  
Management Plan ◽  
Small Scale ◽  
Breeding Period ◽  
Management Measures ◽  
Baseline Information ◽  
Sustainable Fishery ◽  
First Maturity

The mutable nassa, Tritia mutabilis, a marine gastropod that is widely exploited on the Adriatic coast is an important source of income for small-scale fishermen in the Mediterranean Sea, particularly in the Gulf of Lion. However, the lack of knowledge on the ecology and biology of this species limits our capacities to propose and produce an effective management plan. As a result, stocks are currently declining, especially in Italy. In order to optimize a management plan for this fishery, we designed a study to better characterize the reproductive biology of T. mutabilis, using gonad histology and performing a regular monitoring of population size frequency. The average shell height of individuals during the breeding period was 24 ± 2.7 mm for males and 30 ± 3.7 mm for females. The presence of small females (10 mm) and large males (32 mm) in the whole sample challenged previous assumptions regarding protandry (sex change from male to female). The size at first maturity was estimated for males and females at 17.5 mm and 24.4 mm shell height, respectively. In Italy, current management measures include a minimum conservation reference size of 20 mm in shell height. Therefore, it is likely that many individuals that did not reproduce are being caught, which could partly explain the decline observed, despite conservation measures introduced more than ten years ago. Overall, our study provides some baseline information to establish, in consultation with fishermen, management measures for this small-scale fishery in France.

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 Assessing and Advancing Gender Equity in Lake Malawi’s Small-Scale Fisheries Sector

2021 ◽  
Vol 13 (23) ◽  
pp. 13001
Author(s):  
Elin Torell ◽  
Chikondi Manyungwa-Pasani ◽  
Danielle Bilecki ◽  
Innocent Gumulira ◽  
Gordon Yiwombe
Keyword(s):  
Gender Equity ◽  
Value Chain ◽  
Belief Systems ◽  
Qualitative Assessment ◽  
Small Scale ◽  
Men And Women ◽  
Small Scale Fisheries ◽  
Fisheries Resources ◽  
And Gender ◽  
And Control

Women play important, but often invisible, roles in Lake Malawi’s small-scale fisheries sector. This paper augments previous research by exploring the productive and reproductive roles that men and women have in fishing communities and how this shapes women’s access and control over fisheries resources. Contributing to advancing the understanding of how to strengthen women’s roles in the fisheries sector, this paper reports on a qualitative assessment conducted in seven Malawian lakeshore districts. Data collected via focus group discussions, which included gendered resource mapping exercises, revealed belief systems and gender norms that shape men’s and women’s access to and control over lacustrine resources. While both men and women have access to lake and land resources, their roles differ. Men dominate fishing resources whereas women dominate resources that are tied to household management. While all value chain nodes are open to men, women tend to be concentrated in lower-value processing and trading activities. Social norms and values shape people’s access and control over communal resources. It is noteworthy that women who earn an income from the fisheries value chain have more access to savings and credit and have more equal household bargaining power.

scholarly journals KONSEPTUALISASI PENGELOLAAN PERIKANAN LAUT SKALA KECIL BERBASIS LOKASI PKN (Peningkatan Kehidupan Nelayan) (Study Kasus: Wilayah Kecamatan PKN Kabupaten Nagan Raya)

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Farah Diana ◽  
Muhammad Rizal
Keyword(s):  
Fishery Management ◽  
Secondary Data ◽  
Structured Interview ◽  
Primary Data ◽  
Fishing Ground ◽  
Small Scale ◽  
Structured Interviews ◽  
Dominant Type ◽  
Small Scale Fisheries ◽  
Fisheries Resources

Capture fisheries are very important economic activity and have contributed greatly to the total fishery production in general in the District Naganraya. Fishery system that occurs dominated by small-scale fisheries. Fishermen in Naganraya district has a high dependence on fisheries resources as the main source of livelihood and almost all coastal areas based fisheries activities. Small-scale fisheries businesses have an impact on the fishing fleet and fishing locations (fishing ground) resulting in range of fishing operations is limited. The purpose of this research is 1). Analyzing small-scale capture fisheries system in locations PKN Naganraya district, 2). Formulate an alternative strategy in the management of small-scale fishing locations PKN Naganraya district. Data to be collected in this study consisted of primary and secondary data. Primary data was collected intensively using semi-structured interviews (semi-structured interview) to small-scale fishermen, observation and documentation in selected locations. The results showed that the dominant type of fishing gear is trawl catches beach and species that dominate the catch is Sardinella lemuru and Selar spp. Fish marketing patterns in locations peningkapan fishing activities (PKN) is not through the auction only through traders / large and are twelve strategic through internal and external environmental factors were dominant influence on the pattern of the conceptualization of small-scale fishery management in PKN location Nagan Raya.

scholarly journals Unveiling Women’s Roles and Inclusion in Mexican Small-Scale Fisheries (SSF)

2021 ◽  
Vol 7 ◽  
Author(s):  
Neyra Solano ◽  
Ines Lopez-Ercilla ◽  
Francisco J. Fernandez-Rivera Melo ◽  
Jorge Torre
Keyword(s):  
Decision Making ◽  
Value Chain ◽  
Gulf Of California ◽  
Spiny Lobster ◽  
Gender Disparity ◽  
Small Scale ◽  
Mexican Pacific ◽  
Small Scale Fisheries ◽  
Participation Of Women ◽  
Post Production

The contributions of women to fisheries are often invisible, ignored, and unrecognized even though they represent 47% of the global fisheries workforce, especially in pre- and post-production activities. Poor data systems lead to incorrect assumptions about the gender division of labor in fisheries. This causes the role of women in fisheries to be overlooked. To evaluate the contribution of women in the value chain, a participatory methodology was implemented in three small-scale, fisheries in Mexico: California spiny lobster (Panulirus interruptus) fishery from the northern Mexican Pacific, penshell (Atrina maura) fishery from the Gulf of California, and Caribbean spiny lobster (Panulirus argus) fishery from the Mesoamerican Reef region. This study shows an unequal inclusion of men and women as members of the fishing cooperatives where only 4%, 5%, and 20% are women in spiny lobster, red lobster, and penshell, respectively, and in the distribution of direct jobs (1 out of 6.7 jobs was held by a woman). These results indicate limited opportunities for women to access leadership positions. However, the participation percentages increased dramatically when we considered the fishery system (i.e., both direct and indirect jobs), with women accounting for 43%, 21%, and 37% of the California spiny lobster, penshell, and Caribbean spiny lobster fishery workforce, respectively. Women represented 39% of the workforce in pre-production activities, 2% in production, 29% in post-production, and 56% in complementary to production. Women tended to participate in two or more activities at the same time, generally combining work, household, and community activities. The participation of women in fisheries could be equivalent to a second working day, and even when this effort is present in similarly in three fisheries, their contribution is yet to be acknowledged in order to incorporate women in decision-making. The analysis of the value chain and the fishery system provided a more realistic picture of the contribution of women to fisheries than an analysis focused solely on extraction. This work further analyzed the importance and degree of participation of women in fishing cooperatives and the decision-making process. Strategies to reduce gender disparity are needed to encourage inclusion of women in fisheries decision-making.

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