scholarly journals Population characteristics, space use and habitat associations of the seahorse Hippocampus reidi (Teleostei: Syngnathidae)

2007 ◽  
Vol 5 (3) ◽  
pp. 405-414 ◽  
Author(s):  
Ierecê Lucena Rosa ◽  
Tacyana P. R. Oliveira ◽  
André L. C. Castro ◽  
Luiz E. de Souza Moraes ◽  
Josias H. A. Xavier ◽  
...  
Keyword(s):  
Habitat Structure ◽  
Habitat Associations ◽  
Population Characteristics ◽  
Brazilian Coast ◽  
Life Stages ◽  
Unequal Distribution ◽  
Ecological Information ◽  
Spatial Use ◽  
Conservation And Management

This paper provides a case study of a threatened seahorse species, Hippocampus reidi, highlighting the importance of using ecological information to assist conservation and management initiatives. Underwater visual sighting data (50 x 2m transect) gathered along the NE, SE and S portions of the Brazilian coast revealed an unequal distribution across localities, perhaps related to harvesting pressure, and a mean density of 0.026 ind.m-2. Our findings suggest some restricted spatial use by H. reidi, which was consistent with its estimated home range, and with re-sighting of specimens. Reproduction was recorded year-round, however productive peaks may exist. Components of habitat structure mostly used as anchoring points were mangrove plants, macroalgae, cnidarians, seagrass, sponges, and bryozoans. Conservation recommendations include: further characterization and mapping of habitats; assessment of availability and condition of microhabitats in selected areas, and studies on dispersal routes during initial life stages.

scholarly journals Fishes of Paranaguá Estuarine Complex, South West Atlantic

2012 ◽  
Vol 12 (3) ◽  
pp. 226-238 ◽  
Author(s):  
Ana Carolina dos Passos ◽  
Riguel Feltrin Contente ◽  
Ciro Colodetti Vilar de Araujo ◽  
Felippe Alexandre Lisboa de Miranda Daros ◽  
Henry Louis Spach ◽  
...  
Keyword(s):  
Conservation Status ◽  
Fish Fauna ◽  
Brazilian Coast ◽  
Large Dataset ◽  
Ecological Information ◽  
South West ◽  
Minor Part ◽  
Global Biodiversity ◽  
A Minor ◽  
Incomplete Sampling

The objective of this work was to present an updated checklist of the currently known fishes in the Paranaguá Estuarine Complex (PEC) and provides comments on conservation status for the treated species. We used a large dataset derived from a pool of studies which have been conducted within there along the last 30 years. Each study was based on monthly samplings and conducted in several estuarine habitat; thus, the pool covers practically all estuarine habitats and takes into account the seasonal cycle in the system. The PEC ichthyofauna represents a mixture between that fauna typical from the tropical Brazilian coast and that with affinities of temperate Argentinean and Uruguayan zones. The PEC harbors a rich fish fauna of 213 species, inserted in the families that are common along the Brazilian coast. Only a minor part (8%) of the PEC fish fauna was evaluated as regards the conservation status, mostly because of the lack of basic biological and ecological information for most species. Despite part of the among-estuaries differences are due to different and incomplete sampling efforts, the richness in the PEC is surprisingly higher than other systems in Brazil and around world, which emphasize the importance of the region for global biodiversity conservation.

Combination Effects of Large Dam and Weirs on Downstream Habitat Structure: Case Study in the Tamjin River Basin, Korea

2018 ◽  
Vol 36 (4) ◽  
pp. 638-646
Author(s):  
Giyoung Ock ◽  
Ji-Hyun Kang ◽  
Hyung-Geun Park ◽  
Dong-Won Kang
Keyword(s):  
River Basin ◽  
Habitat Structure ◽  
Combination Effects ◽  
Large Dam

scholarly journals A CityGML Multiscale Approach for the Conservation and Management of Cultural Heritage: The Case Study of the Old Town of Taranto (Italy)

2020 ◽  
Vol 9 (7) ◽  
pp. 449
Author(s):  
Massimiliano Pepe ◽  
Domenica Costantino ◽  
Vincenzo Saverio Alfio ◽  
Maria Giuseppa Angelini ◽  
Alfredo Restuccia Garofalo
Keyword(s):  
Information System ◽  
Cultural Heritage ◽  
Spatial Planning ◽  
Multiscale Approach ◽  
File Formats ◽  
Ancient City ◽  
Planning Processes ◽  
The City ◽  
Conservation And Management

The aim of this article is to provide a dedicated approach to the realisation of a CityGML model for the valorisation and the conservation of existing cultural heritage. In particular, for the ancient city of Taranto (Italy), several levels of details (LODs) have been built. CityGML models in LOD1 for the most representative periods were realised, which were characterised by urban changes from the mid-1800s until today. To achieve this aim, great importance was devoted to the process of integration of the different file formats. A geographic information system (GIS) approach has been put in place for the construction of the CityGML model in LOD1. In addition, the study also focused on the realisation of a CityGML model in LOD3 of a bridge of a particular historical and architectural interest, called “Ponte di Porta Napoli”, also situated in the city of Taranto. In the latter case, the CityGML model was realised starting from the geomatics survey. Therefore, the project structured in this way represents an important tool for the sharing of (georeferenced) territorial information. The CityGML models represent a valid support for spatial planning processes and measures for the protection, monitoring and conservation of urban elements.

Structure of microbial soil communities in areas of restinga: a case study in a conservation unit in the Atlantic Forest of the Southern Brazilian coast

2020 ◽  
Vol 61 (4) ◽  
pp. 594-600
Author(s):  
Antônio Lourenço Pinto ◽  
Andressa Danielli Canei ◽  
Rafael Dutra de Armas ◽  
Emanuela Pille da Silva ◽  
Anabel González Hernández ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Brazilian Coast ◽  
Conservation Unit ◽  
Soil Communities

scholarly journals The role of willowherbs (Epilobium) in the recovery of vegetation cover a year after use of herbicide: a case study from Central Lithuania / Ožkarožių (Epilobium) vaidmuo atsikuriant augalijai praėjus metams po herbicido panaudojimo: tyrimas centrinėje Lietuvos dalyje

2016 ◽  
Vol 22 (2) ◽  
pp. 101-112
Author(s):  
Dalytė Matulevičiūtė
Keyword(s):  
Distribution Patterns ◽  
Apple Orchard ◽  
Life Stages ◽  
Herb Layer ◽  
Field Investigations ◽  
Initial Stage ◽  
Agricultural Weeds ◽  
Very High

Abstract Several species of willowherb (Epilobium) are considered as agricultural weeds and their prevalence has become an increasing problem in agriculture. The aim of this study was to investigate the role of willowherb plants in the initial stage of vegetation succession a year after the use of glyphosate. The study was based on the examination of thirteen willowherb specimens collected in the apple orchard of 0.2 ha area in August 2008, one month after glyphosate treatment, and vegetation field investigations in the same orchard in July 2009. The coverage of herb layer, the abundance and life stages of Epilobium plants in twenty plots of 1 m2 in size were investigated. The specimens of willowherbs, which survived the glyphosate application in 2008, were identified as Epilobium ciliatum and E. tetragonum. A year after the glyphosate treatment, the willowherb plants prevailed in the vegetation. One alien (E. ciliatum) and three native (E. hirsutum, E. parviflorum and E. tetragonum) species of willowherb were found. E. ciliatum was the most abundant. This species was characterized by the highest number of reproductive and virginile plants. E. parviflorum and E. tetragonum plants were abundant with a very high proportion of reproductive plants. Only pre-reproductive plants of E. hirsutum occurred in the study plots. The reproductive plants represented more than one third of the total number of willowherb plants. The distribution patterns of willowherb species in the plots were very variable.

scholarly journals The effects of poaching and habitat structure on anti-predator behavioral strategies: A guanaco population in a high cold desert as case study

PLoS ONE ◽  
2017 ◽  
Vol 12 (8) ◽  
pp. e0184018 ◽  
Author(s):  
Flavio Cappa ◽  
Valeria Campos ◽  
Stella Giannoni ◽  
Natalia Andino
Keyword(s):  
Habitat Structure ◽  
Behavioral Strategies ◽  
Cold Desert

Presence-Absence Sampling for Fisheries Management

1990 ◽  
Vol 47 (10) ◽  
pp. 1875-1887 ◽  
Author(s):  
Marc Mangel ◽  
Paul E. Smith
Keyword(s):  
Fisheries Management ◽  
Habitat Structure ◽  
Egg Production ◽  
Fish Stock ◽  
Search Process ◽  
Pelagic Species ◽  
Alternative Method ◽  
Probabilistic Description ◽  
Spawning Biomass

It is often important to estimate the abundance of a fish stock when the stock is somewhat depleted. For pelagic species this presents great operational difficulties, because adult surveys may be prohibitively expensive and time consuming. Here we introduce a method for estimating the spawning biomass of a stock by means of egg or larval surveys. In particular, we develop a series of models for presence-absence sampling of eggs or larvae and show how presence-absence data can be used to estimate adult spawning biomass. The models are based on an underlying probabilistic description of the aggregation of eggs or larvae, a search process, and a description of habitat structure. Methodologies are given for estimating the distribution of the size of the spawning biomass from presence-absence data. A case study of sardine is used to justify a number of the assumptions. The methods are applied to a 1985 survey for sardine eggs and are compared to an alternative method based on egg production.

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