scholarly journals Abundancia y estructura poblacional de dos recursos pesqueros bentónicos fuera y dentro del área de una concesión marítima portuaria en Caldera, Región de Atacama, Chile

2019 ◽  
Vol 54 (2) ◽  
pp. 232
Author(s):  
JM Alonso Vega ◽  
Marcelo Valdebenito ◽  
Luis Caillaux ◽  
Jorge Bravo
Keyword(s):  
Protected Area ◽  
Reference Site ◽  
Marine Protected Area ◽  
Size Structure ◽  
Sea Urchins ◽  
The Future ◽  
Management Plans ◽  
Benthic Resources ◽  
Loxechinus Albus ◽  
Lessonia Berteroana

This study compares density and size structure of kelp Lessonia berteroana and sea urchins Loxechinus albus inside and outside a port concession area in Caldera. Greater abundance and larger adult individuals in populations of both benthic resources in this zone preliminarily indicates that this might be replicating a marine protected area. In the future, this port concession could contribute to the conservation of benthic resources as a reference site, without access to fisheries, useful for validating or implementing measures and actions in management plans or other instruments to support conservation.

scholarly journals Marine protected area and the spatial distribution of the gill net fishery in Copacabana, Rio de Janeiro, RJ, Brazil

2016 ◽  
Vol 76 (1) ◽  
pp. 1-9 ◽  
Author(s):  
R. B. Amorim ◽  
C. Monteiro-Neto
Keyword(s):  
Protected Area ◽  
Rio De Janeiro ◽  
Marine Protected Area ◽  
Local Ecological Knowledge ◽  
Ecological Knowledge ◽  
Target Species ◽  
Fisheries Resources ◽  
Gill Net ◽  
Fishing Gears ◽  
Management Plans

Abstract This study characterizes the gill net fishery at Colônia de Pescadores Z13 (CPZ13), in Copacabana, Rio de Janeiro, and its relationship with the marine protected area ‘Monumento Natural do Arquipélago das Ilhas Cagarras – MoNa Cagarras’, describing the fleet and fishing gears, identifying fishing spots, species and their associations by gillnet type. From June 2012 to May 2013, every Tuesday to Sunday, gill net landings were monitored and fishers interviewed regarding their catch. Small boats (dory whaleboats) are used to set three types of gillnets: “Corvineira” (target species – whitemouth croaker), “linguadeira” (target species – flounders) and “rede-alta” (target species – bluefish). Fifty-nine species within 37 families were captured at 14 fishing spots, showing association with bottom type and distance from shore. The use of fisher’s local ecological knowledge defines gear placement at specific sites targeting fisheries resources. All fishing sites are not within the limits of MoNa Cagarras but would benefit from management plans including an MPA buffering zone.

scholarly journals Landscape configuration of seagrass meadows regulates sea urchins predation in a Marine Protected Area: what is the role of bottom predators?

2015 ◽  
Author(s):  
Simone Farina ◽  
Silvia Oliva ◽  
Ivan Guala ◽  
Rodrigo Silva ◽  
Luigi Piazzi ◽  
...  
Keyword(s):  
Predation Risk ◽  
Sea Urchin ◽  
Protected Area ◽  
Marine Protected Area ◽  
Sea Urchins ◽  
Survival Rates ◽  
Landscape Configuration ◽  
Benthic Assemblages ◽  
Seagrass Meadows

In Mediterranean benthic ecosystems of shallow water local-scale predation maintains a main control on both sea urchin population and the ecological structure of macrophyte community. The use of the habitat by local predator guild in dependence on the regional context shapes prey distributions across the environment. On rocky habitat, the sea urchin Paracentrotus lividus is widely known as prey of apex fish predators that indirectly shape the structure of benthic assemblages whereas, in structured Posidonia oceanica, P. lividus can find shelter from predators. In this study, we assessed survival rates of P. lividus in a Marine Protected Area (Sardinia) at the aim to evaluate the role of composition and configuration of landscape on its predation risk. Sites of different landscapes were selected in function of their heterogeneity estimated according to the different proportions and spatial interspersion of four classes of habitats defined on the basis of P. oceanica meadows arrangement: (1) continuous, (2) fragmented and (3) patchy meadows and (4) absence of seagrass (i.e. rocky bottom with macroalgae communities). In order to capture the domain of the ecological process a sampling grain 5x5 meters was used as minimal spatial resolution at which information is assessed. Specifically continuous sampling units in a grid of 7x7 cells yield landscape quadrats of 35 × 35 m and allowed a finer description of the spatial pattern. For each cell we also estimated structural variables of seagrass habitats such as unburied mat, shoot density, canopy height, cover percent, roughness and the natural abundances of prey and predators. After placing the tagged sea urchins, we daily observed the survival rates for twenty days. Predation risk was significantly higher in continuous and fragmented seagrass habitats and predator marks were typically produced by gastropod’s attacks. Landscape indices are used to correlate the amount of available habitat for gastropods movements with sea urchin’s predation risk. Interestingly, estimated predation rate also was negatively correlated with natural sea urchins density across grid cells. Results suggest that, although fishes are considered among the most important pressures on sea urchin population, especially in effective MPAs, bottom predators’ control can be relevant in structurally complex environment such as seagrasses.

scholarly journals Monitoring the endemic ornamental fish Pterapogon kauderni in Bokan Kepulauan, Banggai marine protected area, Indonesia

DEPIK ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 18-31
Author(s):  
Samliok Ndobe ◽  
Kris Handoko ◽  
Deddy Wahyudi ◽  
Moh. Yasir ◽  
Yulina Irawati ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Protected Area ◽  
Marine Protected Area ◽  
Sea Urchins ◽  
Action Plan ◽  
Marine Conservation ◽  
Ornamental Fish ◽  
Sea Anemone ◽  
Microhabitat Use ◽  
Sea Anemones

Abstract. The Banggai cardinalfish Pterapogon kauderni is a species of national and international conservation concern. Established in November 2019, the Banggai marine protected area (MPA) in Central Sulawesi, Indonesia covers most of the endemic range of this ornamental fish. The third repeat survey (T2 monitoring) under the National Action Plan for Banggai Cardinalfish Conservation (NAP-BCFC) was carried out in October 2019 at eight sites in the Bokan Kepulauan region within the MPA. The T2 monitoring used the standard NAP-BCFC belt transect method. Data were collected on P. kauderni abundance (by size class: recruits, juveniles, adults) and microhabitat (sea urchins, sea anemones, hard corals, and others). Data were evaluated with respect to the T0 (2017) survey and T1 (2018) monitoring at the same sites, as well as previous surveys in 2004 (2 sites) and 2012 (4 sites). The data show wide between-site variation in P. kauderni and microhabitat parameters, with one subpopulation at very high risk of extirpation. Trends included declines over time in P. kauderni, sea urchin and sea anemone abundance, with an increase since 2017 in hard coral microhabitat use by adult P. kauderni. We recommend evaluation of other P. kauderni populations in Bokan Kepulauan and specific site or zone-based actions. However, we conclude that the most urgent priority for P. kauderni conservation in Bokan Kepulauan is protection of key microhabitat through a moratorium on sea urchin and sea anemone collection in P. kauderni habitat.  Keywords: Banggai cardinalfish, endangered species, marine conservation, microhabitat, monitoring, ornamental fishery, CITES

scholarly journals Visitation and economic impact of whale shark tourism in a Maldivian marine protected area

2014 ◽  
Author(s):  
Edgar Fernando Cagua ◽  
Neal M Collins ◽  
James Hancock ◽  
Richard Rees
Keyword(s):  
Mixed Models ◽  
Protected Area ◽  
Marine Protected Area ◽  
Economic Valuation ◽  
Whale Shark ◽  
Management Plans ◽  
Whale Sharks ◽  
Guest Satisfaction ◽  
Shark Conservation ◽  
Direct Expenditure

Whale sharks are a major attraction for tourist divers and snorkelers in South Ari Atoll, Maldives. Yet without information regarding the use and economic extent of the attraction, it is difficult to prioritize conservation or implement effective management plans. Using empirical recreational data and generalized mixed models, this study provides the first economic valuation—via direct spend—of whale shark tourism in Maldives. We estimate that direct expenditure on whale shark excursions in the South Ari Marine Protected Area for 2012–2013 at US$7.6 and $9.4 million, respectively. These expenditures are based on an estimate of 72 to 78 thousand tourists who are involved in whale shark excursions annually. This level of visitation and expenditure highlights the need to implement regulations and management which can safeguard the sustainability of the industry through ensuring guest satisfaction and whale shark conservation.

scholarly journals Landscape configuration of seagrass meadows regulates sea urchins predation in a Marine Protected Area: what is the role of bottom predators?

2015 ◽  
Author(s):  
Simone Farina ◽  
Silvia Oliva ◽  
Ivan Guala ◽  
Rodrigo Silva ◽  
Luigi Piazzi ◽  
...  
Keyword(s):  
Predation Risk ◽  
Sea Urchin ◽  
Protected Area ◽  
Marine Protected Area ◽  
Sea Urchins ◽  
Survival Rates ◽  
Landscape Configuration ◽  
Benthic Assemblages ◽  
Seagrass Meadows

In Mediterranean benthic ecosystems of shallow water local-scale predation maintains a main control on both sea urchin population and the ecological structure of macrophyte community. The use of the habitat by local predator guild in dependence on the regional context shapes prey distributions across the environment. On rocky habitat, the sea urchin Paracentrotus lividus is widely known as prey of apex fish predators that indirectly shape the structure of benthic assemblages whereas, in structured Posidonia oceanica, P. lividus can find shelter from predators. In this study, we assessed survival rates of P. lividus in a Marine Protected Area (Sardinia) at the aim to evaluate the role of composition and configuration of landscape on its predation risk. Sites of different landscapes were selected in function of their heterogeneity estimated according to the different proportions and spatial interspersion of four classes of habitats defined on the basis of P. oceanica meadows arrangement: (1) continuous, (2) fragmented and (3) patchy meadows and (4) absence of seagrass (i.e. rocky bottom with macroalgae communities). In order to capture the domain of the ecological process a sampling grain 5x5 meters was used as minimal spatial resolution at which information is assessed. Specifically continuous sampling units in a grid of 7x7 cells yield landscape quadrats of 35 × 35 m and allowed a finer description of the spatial pattern. For each cell we also estimated structural variables of seagrass habitats such as unburied mat, shoot density, canopy height, cover percent, roughness and the natural abundances of prey and predators. After placing the tagged sea urchins, we daily observed the survival rates for twenty days. Predation risk was significantly higher in continuous and fragmented seagrass habitats and predator marks were typically produced by gastropod’s attacks. Landscape indices are used to correlate the amount of available habitat for gastropods movements with sea urchin’s predation risk. Interestingly, estimated predation rate also was negatively correlated with natural sea urchins density across grid cells. Results suggest that, although fishes are considered among the most important pressures on sea urchin population, especially in effective MPAs, bottom predators’ control can be relevant in structurally complex environment such as seagrasses.

scholarly journals Population Structure and Growth of the Threatened Pen Shell, Pinna rudis (Linnaeus, 1758) in a Western Mediterranean Marine Protected Area

2016 ◽  
Vol 17 (3) ◽  
pp. 785 ◽  
Author(s):  
E. NEBOT COLOMER ◽  
M. VÁZQUEZ-LUIS ◽  
J. R. GARCÍA-MARCH ◽  
S. DEUDERO
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Size Structure ◽  
Western Mediterranean ◽  
Shell Width ◽  
Wide Range ◽  
Pen Shell ◽  
Absolute Growth ◽  
Slow Growing ◽  
Established Population

Coastal ecosystems are being extensively degraded by human activities. Benthic, slow-growing and long-lived species are highly vulnerable to these impacts. Marine protected areas might avoid biodiversity losses through habitat protection. The pen shell Pinna rudis is a protected species, but scarce data are available on its ecology and biology. The present study is a comprehensive ecological study encompassing several unknown aspects of the growth and inner record in relation to habitat types, density and size distribution. A total of 418 strip transects were conducted by scuba diving in the Marine Protected Area of Cabrera National Park (39.14° N, 2.96° E), during the summers of 2011, 2012 and 2013. Sampling was conducted across different habitats and depths exploring 152,146.35 m2 in total. Densities varied spatially within the park (from 0 to 6.89 ind./100 m2) corresponding to a wide range of sizes and ages. Most pen shells were patchily distributed and mainly concentrated in caves. Two hotspots with high densities represent the highest densities ever recorded worldwide, showing a possible link to high larval accumulation and settlement. The population size structure showed a unimodal distribution with shell width ranging from 6.2 to 25.0 cm, with an average shell width of 16.0 ± 3.4 cm. The absolute growth was asymptotic, with a maximum age and length of 28-31 years and 45 cm, respectively. This study on the biology and ecology of a well-established population of Pinna rudis in the Western Mediterranean could set a baseline for the conservation of this species in other areas.

scholarly journals KAJIAN PEMANFAATAN WILAYAH PESISIR DAN LAUT KECAMATAN TANALILI KABUPATEN LUWU UTARA BERBASIS ZONASI KAWASAN

2020 ◽  
Vol 3 (1) ◽  
pp. 1-13
Author(s):  
Akram Akram ◽  
Abdul Rauf ◽  
Rustam Rustam
Keyword(s):  
Natural Resources ◽  
Protected Area ◽  
Development Policy ◽  
Marine Protected Area ◽  
Mangrove Ecosystem ◽  
Physical Damage ◽  
Rehabilitation Programs ◽  
Management Plans ◽  
Development Analysis ◽  
Area Development

The coastal area of Tanalili District has many coastal and marine natural resources. However, its utilization has not been well managed and has resulted in uncontrolled utilization. This research aimed to: (1) Identify the condition and potential of coastal natural resources (2) Analyze the suitability of land to its designation (3) Integrate land use zoning (4) Determine coastal and marine area development strategies. This research was conducted in January to March 2018. Potential of coastal resources, land suitability and zoning were analyzed using a Geographic Information System (GIS) and SWOT for development analysis. The results of this study indicate the area of 96.38 Ha mangrove ecosystem, seagrass 31,68 Ha, coral reefs 192,81 Ha. Zoning area showed a general utilization area of 6.132,49 Ha which was divided into 4 zones; aquaculture zone with an area of 1.012,31 Ha, capture fisheries zone with an area of 4.875,76 Ha, a port zone with an area of 46,91 Ha and other zones covering an area of 197,51 Ha. The area of marine protected area is 1,393.99 Ha and the regional sea lanes for shipping activities is 526.88 Ha. The results of the development policy analysis were the provision of a potential data base, the formation of business groups in accordance with the potential, compilation of management plans according to zoning, improvement of human resources quality both the community and related stakeholders and rehabilitation programs to control physical damage to the coast and ecosystems by involving the community.

scholarly journals Caractérisation de l’ichtyo faune de l’AMP de JoalFadiouth (Sénégal)

2020 ◽  
Vol 154 ◽  
pp. 15950-15959
Author(s):  
Yakhya Ben Abdallah BADIANE ◽  
Bienvenu SAMBOU
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Size Structure ◽  
Fish Fauna ◽  
Fish Population ◽  
Biological Data ◽  
The State ◽  
Collecte De Données ◽  
Geographical Position

Objectif : L’étude a été menée dans l’Aire Marine Protégée (AMP) de Joal-Fadiouth avec pour principal objectif de déterminer l’état et la configuration de l’ichtyofaune dans les zones protégées en milieu marin. Méthodologie et Résultats : La méthode de collecte de données biologiques de ce travail repose principalement sur la pêche expérimentale (SFA, 2011). Elle repose, pour la plupart, sur une pêche d’échantillonnage du fait des surfaces importantes à étudier. L’étude a pris en compte de quatre périodes importantes du cycle hydro-climatique. L’AMP de Joal-Fadiouth est marquée par la présence d’une ichtyofaune riche et variée. On y note 126 espèces de poisson réparties en 49 familles dont les plus représentatives sont les Carangidae, les Sparidae et les Haemulidae. Certains paramètres comme la structure en taille de la population de poissons laisse apparaître beaucoup de variations entre les saisons hydrologiques. Conclusion et applicabilité des résultats : L’état et la configuration de l’ichtyo faune de l’AMP sont le résultat de la combinaison de trois facteurs notamment la position géographique du site, la diversité de l’habitat et l’absence de pêche destructive. Par conséquent pour l’amélioration de la gestion de l’AMP, ces facteurs devraient être tenus en compte. Mots clés : Aire marine protégée, Pêche expérimentale, Poisson, Espèce, Biomasse, Taille Characterization of the ichtyofaune of the Joal-Fadiouth MPA (Senegal) ABSTRACT Objective: The study was conducted in the Joal-Fadiouth MPA to determine the state and configuration of the fish fauna in protected areas in the marine environment. Methodology et Results: The method of collecting biological data was mainly based on experimental fishing (SFA, 2011). The study took into account four important periods of the hydro-climatic cycle. Some of parameters such as the size structure of the fish population reveal a lot of variations between hydrological seasons. The Marine Protected Area of Joal-Fadiouth is marked by the presence of a rich and varied fish fauna. There are 126 species of fish distributed in 49 families, the most representative of which are Carangidae, Sparidae and Haemulidae. Certain parameters, such as the size structure of the fish population, reveal many variations between hydrological seasons. Badiane et Sambou, J. Appl. Biosci. 2020 Caractérisation de l’ichtyo faune de l’AMP de Joal-Fadiouth (Sénégal) 15951 Conclusion and applicability of findings: The state and the configuration of the ichthyofauna of the MPA are the result of the combination of three factors, in particular the geographical position of the site, the diversity of the habitat and the absence of destructive fishing, therefore for the improvement of its management, these factors should be taken into account. Key words: Marine Protected Area, Experimental Fishing, Fish, Species, Biomass, Size

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