scholarly journals Investigating Spinner Dolphin (Stenella longirostris) Occurrence and Acoustic Activity in the Maui Nui Region

2021 ◽  
Vol 8 ◽  
Author(s):  
Megan M. McElligott ◽  
Marc O. Lammers
Keyword(s):  
Coastal Waters ◽  
Pacific Islands ◽  
Regional Office ◽  
Acoustic Activity ◽  
Stenella Longirostris ◽  
The Pacific ◽  
Spinner Dolphin ◽  
Spinner Dolphins ◽  
Negative Impacts ◽  
Passive Acoustic

Hawaiian spinner dolphins (Stenella longirostris) rest during the day in the islands’ coastal waters where they are susceptible to human disturbance. Due to concerns over the negative impacts of human activity, the Pacific Islands Regional Office of the National Oceanic and Atmospheric Administration (NOAA) has proposed a 50-yard approach rule for spinner dolphins and is also considering time-area closures of certain important spinner dolphin resting areas. However, gaps still persist in the understanding of how spinner dolphin populations on different Hawaiian Islands use coastal waters, raising questions about the efficacy of the proposed rules. To better understand how spinner dolphins use the waters in the Maui Nui region (Maui, Moloka‘i, Lāna‘i, and the ‘Au‘au channel), a study was conducted using a combination of passive acoustic monitoring and vessel surveys to document spinner dolphin occurrence and movements. Bottom-moored acoustic recorders were deployed at eight locations in Maui Nui, and at one previously established resting bay off west O‘ahu for comparison. The amount of whistles, clicks, and burst pulses at each location was quantified and averaged by the hour of the day. Acoustic activity was greater at the O‘ahu site than at any of the Maui Nui sites, and was greatest between sunrise and noon. Acoustic activity and vessel surveys both reveal that spinner dolphins occur and exhibit resting behaviors in the ‘Au‘au channel between Maui and Lāna‘i, and also along west Maui and southeast Lāna‘i. Spinner dolphins resting in a channel between islands appears to be unique to Maui Nui and differs from resting patterns described along Hawai‘i Island and O‘ahu. Because spinner dolphins appear to use both the coastlines and the channel to rest in Maui Nui, the 50-yard approach rule appears to be a more suitable management option for the region than time-area closures.

scholarly journals haracterizing the Effects of Two Storms on the Coastal Waters of O‘ahu, Hawai‘i, Using Data from the Pacific Islands Ocean Observing System

Oceanography ◽  
2011 ◽  
Vol 24 (2) ◽  
pp. 182-199 ◽  
Author(s):  
Michael Tomlinson ◽  
Eric De Carlo ◽  
Margaret McManus ◽  
Geno Pawlak ◽  
Grieg Steward ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Pacific Islands ◽  
The Pacific ◽  
Using Data ◽  
Ocean Observing

scholarly journals Structure and phylogeography of two tropical predators, spinner ( Stenella longirostris ) and pantropical spotted ( S. attenuata ) dolphins, from SNP data

2018 ◽  
Vol 5 (4) ◽  
pp. 171615 ◽  
Author(s):  
Matthew S. Leslie ◽  
Phillip A. Morin
Keyword(s):  
Population Structure ◽  
Pacific Ocean ◽  
Nuclear Dna ◽  
Population Level ◽  
Genetic Connectivity ◽  
Nucleotide Polymorphisms ◽  
Stenella Longirostris ◽  
Spinner Dolphin ◽  
Spinner Dolphins ◽  
Almost All

Little is known about global patterns of genetic connectivity in pelagic dolphins, including how circumtropical pelagic dolphins spread globally following the rapid and recent radiation of the subfamily delphininae. In this study, we tested phylogeographic hypotheses for two circumtropical species, the spinner dolphin ( Stenella longirostris ) and the pantropical spotted dolphin ( Stenella attenuata ), using more than 3000 nuclear DNA single nucleotide polymorphisms (SNPs) in each species. Analyses for population structure indicated significant genetic differentiation between almost all subspecies and populations in both species. Bayesian phylogeographic analyses of spinner dolphins showed deep divergence between Indo-Pacific, Atlantic and eastern tropical Pacific Ocean (ETP) lineages. Despite high morphological variation, our results show very close relationships between endemic ETP spinner subspecies in relation to global diversity. The dwarf spinner dolphin is a monophyletic subspecies nested within a major clade of pantropical spinner dolphins from the Indian and western Pacific Ocean populations. Population-level division among the dwarf spinner dolphins was detected—with the northern Australia population being very different from that in Indonesia. In contrast to spinner dolphins, the major boundary for spotted dolphins is between offshore and coastal habitats in the ETP, supporting the current subspecies-level taxonomy. Comparing these species underscores the different scale at which population structure can arise, even in species that are similar in habitat (i.e. pelagic) and distribution.

Passive acoustic monitoring of marine ecosystems in the Pacific Islands Region.

2009 ◽  
Vol 125 (4) ◽  
pp. 2547-2547 ◽  
Author(s):  
Marc O. Lammers ◽  
Kevin Wong ◽  
Russell E. Brainard ◽  
Whitlow W. L. Au ◽  
Pollyanna Fisher‐Pool
Keyword(s):  
Pacific Islands ◽  
Acoustic Monitoring ◽  
Marine Ecosystems ◽  
Passive Acoustic Monitoring ◽  
The Pacific ◽  
Passive Acoustic

Patterns of coastal use by Hawaiian spinner dolphins (Stenella longirostris) observed using passive acoustic monitoring.

2008 ◽  
Vol 124 (4) ◽  
pp. 2483-2483 ◽  
Author(s):  
Marc O. Lammers ◽  
Simona Bernasconi ◽  
Whitlow W. L. Au ◽  
Kevin Wong ◽  
Russell E. Brainard
Keyword(s):  
Acoustic Monitoring ◽  
Passive Acoustic Monitoring ◽  
Stenella Longirostris ◽  
Spinner Dolphins ◽  
Passive Acoustic

Descriptive parameters of pulsed calls for the spinner dolphin, Stenella longirostris, in the Fernando de Noronha Archipelago, Brazil

2008 ◽  
Vol 88 (6) ◽  
pp. 1093-1097 ◽  
Author(s):  
Marcos R. Rossi-Santos ◽  
José Martins da Silva ◽  
Flavio Lima Silva ◽  
Emygdio L.A. Monteiro-Filho
Keyword(s):  
Visual Inspection ◽  
Maximum Frequency ◽  
Acoustic Parameters ◽  
Call Duration ◽  
Minimum Frequency ◽  
Stenella Longirostris ◽  
Spinner Dolphin ◽  
Fernando De Noronha ◽  
Spinner Dolphins ◽  
Southern Atlantic Ocean

The aim of this work is to describe the repertoire of calls utilized by the spinner dolphins (Stenella longirostris) in the southern Atlantic Ocean. We measured four acoustic parameters of the fundamental frequency of each call: (i) duration; (ii) frequency amplitude; (iii) minimum frequency; and (iv) maximum frequency. We also classified calls by their shape contour by visual inspection of the spectrograms. The obtained values for call duration were 0.046 to 2.08 seconds (mean 0.433, standard deviation (SD) 0.433), amplitude of 0.13 to 2.01 kHz (mean of 0.36, SD 0.29), minimum frequency of 0.22 to 1.80 (mean 0.55, SD 0.29), maximum frequency of 0.46 to 7.50 (mean 1.00, SD 0.89). We classified 73 calls by spectral contour, identifying six basic types of discernible calls, showing heterogeneity among the call types, with C1, C2 and C3 calls presenting higher frequencies, 21, 30 and 23%, respectively. We found that the calls of S. longirostris in the Fernando de Noronha Archipelago are more diverse and complex than previously recognized for spinner dolphins and further studies worldwide can reinforce the broad use of this sound for the species repertoire.

Spinner dolphin (Stenella longirostris) resting habitat in Samadai Reef (Egypt, Red Sea) protected through tourism management

2008 ◽  
Vol 89 (1) ◽  
pp. 211-216 ◽  
Author(s):  
Giuseppe Notarbartolo-di-Sciara ◽  
Mahmoud H. Hanafy ◽  
Moustafa M. Fouda ◽  
Ayman Afifi ◽  
Marina Costa
Keyword(s):  
Red Sea ◽  
Core Habitat ◽  
Tourism Management ◽  
Stenella Longirostris ◽  
Spinner Dolphin ◽  
The Mean ◽  
Red Sea Coast ◽  
Spinner Dolphins ◽  
Governmental Management ◽  
Sea Coast

The daily presence of spinner dolphins,Stenella longirostris, inside a small reef offshore the Red Sea coast of southern Egypt was monitored from January 2004 to January 2006. Observations indicated marked seasonal and daily variations in the use of the reef as a resting and socializing area by the dolphins, consistent during the two years of monitoring. Overall, the mean number of dolphins present in the reef at any day was 39.2 (SD = 39.34, range 0–210), with the lowest presence in February to April and the highest in June. Similar to other populations of this species in other oceans, dolphins entered the reef between daybreak and mid-morning, and started exiting during the afternoon hours. Although calves were seen in all seasons, a sharp peak was observed in June. Monitoring data provided indications relevant to governmental management efforts, which were implemented in 2004 to ensure that the dolphins could continue using the reef for their resting needs while a sustainable, respectful tourist activity is allowed in a designated zone of the reef adjacent to the dolphins' core habitat.

scholarly journals Historical and future drought impacts in the Pacific islands and atolls

2021 ◽  
Vol 166 (1-2) ◽  
Author(s):  
Viliamu Iese ◽  
Anthony S. Kiem ◽  
Azarel Mariner ◽  
Philip Malsale ◽  
Tile Tofaeono ◽  
...  
Keyword(s):  
Pacific Islands ◽  
Meteorological Drought ◽  
Agricultural Drought ◽  
Future Research ◽  
Socioeconomic Conditions ◽  
Cultural Attitudes ◽  
Drought Impacts ◽  
The Pacific ◽  
Negative Impacts ◽  
Meteorological Droughts

AbstractDrought is known as a “creeping disaster” because drought impacts are usually noticed months or years after a drought begins. In the Pacific Island Countries and Territories (PICTs), there is almost no ability to tell when a drought will begin or end, especially for droughts other than meteorological droughts. Monitoring, forecasting and managing drought in the PICTs is complex due to the variety of different ways droughts occur, and the diverse direct and indirect causes and consequences of drought, across the PICT region. For example, the impacts of drought across the PICTs vary significantly depending on (i) the type of drought (e.g. meteorological drought or agricultural drought); (ii) the location (e.g. high islands versus atolls); (iii) socioeconomic conditions in the location affected by drought; and (iv) cultural attitudes towards the causes of drought (e.g. a punishment from God versus a natural process that is potentially predictable and something that can be managed). This paper summarises what is known and unknown about drought impacts in the PICTs and provides recommendations to guide future research and investment towards minimising the negative impacts of droughts when they inevitably occur in the PICTs.

scholarly journals The Contributions of Special Events to Sport-for-Development Programs

2016 ◽  
Vol 30 (6) ◽  
pp. 629-642 ◽  
Author(s):  
Nico Schulenkorf
Keyword(s):  
Pacific Islands ◽  
Empirical Investigation ◽  
Design Management ◽  
Development Programs ◽  
Special Events ◽  
Sport For Development ◽  
The Pacific ◽  
Management Capacity ◽  
The World ◽  
Negative Impacts

For several years, sport-for-development (SFD) programs have been implemented around the world to make a positive difference for disadvantaged or underprivileged communities. Within this context, special events have been used to complement regular development activities to celebrate social, cultural, and sporting achievements. To date, little managerial work has been conducted on the specific contributions that special events can play in the context of ongoing SFD endeavors. In addressing this issue, this paper presents findings from an empirical investigation of a participatory SFD event in the Pacific Islands. Findings suggest that special events can create new interest and excitement for SFD activities, reengage stakeholders to the wider SFD program, leverage partnerships, and provide opportunities to build and shape local management capacity. In discussing these findings, the paper highlights potential positive and negative impacts of special SFD events and provides practical and theoretical implications for SFD program design, management, and leverage.

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