Marine Debris Polymers on Main Hawaiian Island Beaches, Sea Surface, and Seafloor

2019 ◽  
Vol 53 (21) ◽  
pp. 12218-12226 ◽  
Author(s):  
Kayla C. Brignac ◽  
Melissa R. Jung ◽  
Cheryl King ◽  
Sarah-Jeanne Royer ◽  
Lauren Blickley ◽  
...  
Keyword(s):  
Hawaiian Island ◽  
Sea Surface ◽  
Marine Debris ◽  
Main Hawaiian Island

Site fidelity and movements of sharks associated with ocean-farming cages in Hawaii

2010 ◽  
Vol 61 (12) ◽  
pp. 1366 ◽  
Author(s):  
Yannis P. Papastamatiou ◽  
David G. Itano ◽  
Jonathan J. Dale ◽  
Carl G. Meyer ◽  
Kim N. Holland
Keyword(s):  
Site Fidelity ◽  
Hawaiian Island ◽  
Fish Farms ◽  
Carcharhinus Plumbeus ◽  
Galeocerdo Cuvier ◽  
Water Users ◽  
Top Predators ◽  
Coastal Species ◽  
Main Hawaiian Island ◽  
Passive Acoustic

Sharks are found in association with main Hawaiian Island ocean fish farms more frequently and at higher densities than is typical for coastal Hawaiian waters. Sharks attracted to fish farms could potentially threaten human water users, interact negatively with other fisheries, and seasonal migrations could be disrupted if individuals become entrained around farms throughout the year. We hypothesised that smaller coastal species would reside near farms, whereas more wide-ranging species would associate with farms only for short periods. We utilised passive acoustic telemetry to monitor the movements and behaviour of sandbar (Carcharhinus plumbeus) and tiger (Galeocerdo cuvier) sharks adjacent to two open ocean fish farms in Hawaii. Approximately half the tagged sandbar sharks showed site fidelity to the farms, with some individuals being detected repeatedly for 2.5 years. Sandbar sharks moved seasonally to the west coast of Oahu, suggesting that fish farms are not disrupting natural seasonal cycles in this species. Tiger sharks tagged near the cages were more transient, and showed much shorter residence times although some individuals returned sporadically to the cages over the 3-year period. Ocean fish cages appear to aggregate sandbar sharks, but are only ‘visited’ by tiger sharks. Although threats to public safety are probably minimal, the ecological effects of aggregating top-predators are still unknown.

scholarly journals Post-release survival of fallout Newell’s shearwater fledglings from a rescue and rehabilitation program on Kaua‘i, Hawai‘i

2020 ◽  
Vol 43 ◽  
pp. 39-50
Author(s):  
AF Raine ◽  
T Anderson ◽  
M Vynne ◽  
S Driskill ◽  
H Raine ◽  
...  
Keyword(s):  
Large Scale ◽  
Survival Rates ◽  
Hawaiian Island ◽  
Rehabilitation Program ◽  
Unresolved Issue ◽  
Root Cause ◽  
The North ◽  
Main Hawaiian Island ◽  
Satellite Transmitters ◽  
The North Pacific

Light attraction impacts nocturnally active fledgling seabirds worldwide and is a particularly acute problem on Kaua‘i (the northern-most island in the main Hawaiian Island archipelago) for the Critically Endangered Newell’s shearwater Puffinus newelli. The Save Our Shearwaters (SOS) program was created in 1979 to address this issue and to date has recovered and released to sea more than 30500 fledglings. Although the value of the program for animal welfare is clear, as birds cannot simply be left to die, no evaluation exists to inform post-release survival. We used satellite transmitters to track 38 fledglings released by SOS and compared their survival rates (assessed by tag transmission duration) to those of 12 chicks that fledged naturally from the mountains of Kaua‘i. Wild fledglings transmitted longer than SOS birds, and SOS birds with longer rehabilitation periods transmitted for a shorter duration than birds released immediately or rehabilitated for only 1 d. Although transmitter durations from grounded fledglings were shorter (indicating impacts to survivorship), some SOS birds did survive and dispersed out to sea. All surviving birds (wild and SOS) traveled more than 2000 km to the southwest of Kaua‘i, where they concentrated mostly in the North Pacific Equatorial Countercurrent Province, revealing a large-scale annual post-breeding aggregation zone for fledgling Newell’s shearwaters. While there was reduced survival among birds undergoing rehabilitation, SOS remains an important contribution toward the conservation of Newell’s shearwater because a proportion of released birds do indeed survive. However, light attraction, the root cause of fallout, remains a serious unresolved issue on Kaua’i.

scholarly journals Characteristics of surface currents in Manado Bay, North Sulawesi, Indonesia

2021 ◽  
Vol 5 (1) ◽  
pp. 42-52
Author(s):  
Aulia Dyan Yohanlis ◽  
Mutiara Rachmat Putri
Keyword(s):  
Surface Current ◽  
Current Speed ◽  
Sea Surface ◽  
Marine Debris ◽  
Surface Currents ◽  
Hydrodynamic Simulation ◽  
Average Speed ◽  
Debris Accumulation ◽  
North Sulawesi ◽  
Current Flows

Manado Bay is a complex waterway located in Manado City, North Sulawesi, Indonesia. It is an entry point for the Indonesia Trough-Flow, and its circulation is affected by the seasonal winds. Manado City has no debris net on its river estuaries. Therefore, marine debris can easily be carried away by the ocean currents and accumulate in the tourism areas located along the coast of Manado Bay. Consequently, it is important to study the sea surface current circulation in Manado Bay to deal with marine debris accumulation. In the present study, we utilized the DELFT3D software to simulate the hydrodynamic circulation in Manado Bay from 2016-2017. We conducted a 2-dimension (2D) horizontal hydrodynamic simulation using tidal and wind forcing from European Centre for Medium-Range Weather (ECMWF). The simulation results indicate that the change in bathymetry and wind affect the sea surface currents. During the summer monsoon (June-August), the sea surface current flows from the northeast to the southwest with an average speed of 1.1 cm s-1. On the contrary, during the transitional monsoon 1 (September-November), the sea surface current flows from the southeast to the northwest with an average speed of 1.3 cm s-1. Meanwhile, in the winter monsoon (December-February), the sea surface current originated from the southwest flows to the east with an average velocity of 1.9 cm s-1. Then, it moves from west to east during transitional monsoon 2 (March-May) with an average speed of 1.5 cm s-1. The current speed increases whenthe water enters the strait between the Bunaken Islands due to refraction, diffraction, and shallowing effect. As current flows toward the shallower area, the current speed increases, compensating the water column reduction.

Nearshore sea surface macro marine debris in Maui County, Hawaii: Distribution, drivers, and polymer composition

2019 ◽  
Vol 138 ◽  
pp. 70-83 ◽  
Author(s):  
Jens J. Currie ◽  
Stephanie H. Stack ◽  
Kayla C. Brignac ◽  
Jennifer M. Lynch
Keyword(s):  
Sea Surface ◽  
Marine Debris ◽  
Polymer Composition

Detecting and Classifying Marine Plastic Debris from high-resolution multispectral satellite data

2021 ◽  
Author(s):  
Aikaterini Kikaki ◽  
Ioannis Kakogeorgiou ◽  
Paraskevi Mikeli ◽  
Dionysios E. Raitsos ◽  
Konstantinos Karantzalos
Keyword(s):  
High Resolution ◽  
Satellite Data ◽  
Marine Pollution ◽  
Sea Surface ◽  
Marine Debris ◽  
Global Ocean ◽  
Plastic Debris ◽  
Machine Learning Classification ◽  
Geographical Regions ◽  
Marine Plastic Debris

<p>Plastic debris in the global ocean is considered an essential issue with severe implications for human health and marine ecosystems. Remote sensing is a useful tool for detecting and identifying marine pollution; however, there are still few studies and benchmark datasets for developing monitoring solutions for marine plastic debris detection from high-resolution satellite data.</p><p>Here, we present an annotated plastic debris dataset from different geographical regions, seasons, and years, including annotations for sea surface features (e.g., foam), objects (e.g., ship) and floating macroalgae species such as Sargassum. Our dataset is based on high-resolution multispectral satellite observations collected mainly for the period 2014-2020 over the Gulf of Honduras (Caribbean Sea). Over this region, large plastic debris masses and Sargassum macroalgae blooms have been frequently reported, suggesting that it is an ideal region to examine satellite sensors' effectiveness in plastic debris identification, as well as monitoring along with sea surface circulation and meteorological data.</p><p>We also present a set of machine learning classification frameworks for marine debris detection on high-resolution satellite imagery, comparing qualitatively and quantitatively their overall performance. The new algorithms were validated against different regions that have been reported as major plastic polluted areas, as well as their performance was compared to well-established FAI and new promising FDI. This benchmark study can trigger more research and developement efforts towards the systematic detection and monitoring of marine plastic pollution.</p>

scholarly journals MARINE DEBRIS DISTRIBUTION, VARIATION AND PATTERN/SEASONAL CHANGES ALONG THE COAST AND ON SEA SURFACE OF THE KAGOSHIMA BAY

2015 ◽  
Vol 71 (2) ◽  
pp. I_503-I_508
Author(s):  
Benjamin Dotto MAJANGA ◽  
Shigeru FUJIEDA ◽  
Ryuichiro NISHI ◽  
Kazunori HOSOTANI
Keyword(s):  
Seasonal Changes ◽  
Sea Surface ◽  
Marine Debris ◽  
Kagoshima Bay

Ethnocultural Differences in PTSD and Anger in Hawaiian Island Veterans

2010 ◽  
Author(s):  
Heather M. Sones ◽  
Steven Thorp ◽  
Carolyn J. Greene ◽  
Kathleen M. Grubbs ◽  
Leslie A. Morland
Keyword(s):  
Hawaiian Island

Persepsi Dan Partisipasi Pengunjung Terhadap Permasalahan Sampah Laut (Marine Debris) Di Pantai Temberan Kabupaten Bangka Dan Pantai Pasir Padi Pangkalpinang

2020 ◽  
Vol 3 (1) ◽  
pp. 11-20
Author(s):  
Siska Oktavia ◽  
Wahyu Adi ◽  
Aditya Pamungkas
Keyword(s):  
Data Collection ◽  
Random Sampling ◽  
Sampling Technique ◽  
Marine Debris ◽  
Reliability Test ◽  
Validity Test ◽  
Data Collection Technique ◽  
Mixed Approach ◽  
Relationship Of ◽  
The Relationship

This study aims to analyze the value of the density of marine debris, perceptions and participation in Temberan beach and Pasir Padi beach, as well as determine the relationship of perception and participation to the density of marine debris. This research is a type of research that is descriptive with a mixed approach (quantitative and qualitative). The study was conducted at Temberan beach in Bangka Regency and Pasir Pasir Beach Pangkal Pinang in October 2019. The sampling technique used was random sampling and purposive sampling. The data collection technique was carried out using observation technique namely sampling and questionnaire. The validity test uses the Pearson Product Moment formula and the reliability test uses the Cronbach’s Alpha formula. The results showed that the density of debris in the Temberan beach was more dominant at 10.92 pieces/meter2, while at Temberan beach 3 pieces/meter2. The results of perception and participation are different, with the Temberan beach occupying more complex waste problems. The relationship of perception and participation in the density of marine debris have a relationship that affects each other.

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