The Comparison of Whistle Characteristics of Bottlenose Dolphins (Tursiops Truncatus) in the Coast of Montenegro and the Eastern Mediterranean Sea of Turkey: A Preliminary Study DOI

Yarnick Herben,

Evie White,

Irna Huisjes

et al.

2022 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea), Journal Year: 2023, Volume and Issue: unknown, P. 346 - 350

Published: Oct. 4, 2023

The most researched acoustic system belongs to bottlenose dolphins (Tursiops truncatus), however despite their wide, sophisticated, and plastic repertoire, there is still much that unknown about them. This study intends compare the whistle features of in Eastern Mediterranean Sea Turkey Adriatic (in coastal waters Montenegro). information regarding characteristics cetaceans limited, our preliminary will add knowledge. For analysis a total 202 whistles from Montenegro 682 were used. A significant difference between type two countries was found. According PCA test, variables Inflection points High frequency explained more than 80% variation data for Montenegro, this by Center Delta frequency. Rank-Manova showed differences on PC1 PC2. In comparison Turkey, regions had lower average each parameter, with exception number inflection points. can be geographic isolation regions. Efficient conservation management plans created gaining better understanding delphinid bioacoustics, including traits variations different locations under various anthropogenic pressures.

Language: Английский

Whales and dolphins of the Adriatic Sea DOI Open Access
Giovanni Bearzi, Silvia Bonizzoni, Tilen Genov

et al.

Acta Adriatica, Journal Year: 2024, Volume and Issue: 65(1), P. 75 - 121

Published: Jan. 1, 2024

The Adriatic Sea is one of the Mediterranean areas most exposed to cumulative human stressors. This semienclosed and largely shallow basin has been subjected intensive exploitation destructive fishing practices for decades, resulting in biodiversity decline poor ecosystem health. Diversity cetaceans lower than other parts Mediterranean, extant dolphins whales have facing threats that include combined effects habitat loss degradation, prey depletion, incidental mortality injury caused by fisheries, anthropogenic noise, chemical contamination climate change. Here, we report information nine cetacean species known occur (classified as either regular, visitor or vagrant), plus three characterized a single record. For these species, review evidence from field research studies – with bias towards common bottlenose dolphin Tursiops truncatus (by far intensively-studied this area). We also describe characterize main Adriatic, relying on recent literature well historical helps frame present status context past impacts (particularly extensive killing campaigns conducted until 1960s). Finally, provide management recommendations inform guide action must be taken compliance legislation, marine conservation directives international commitments protect biodiversity.

Language: Английский

Citations

2
Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins DOI Creative Commons
António Silva, Joana Castro, André Cid

et al.

Oceans, Journal Year: 2024, Volume and Issue: 5(4), P. 770 - 784

Published: Oct. 16, 2024

Recent years have seen a notable rise in dolphin-watching boat activities along the Algarve coast Portugal, potentially affecting common dolphin (Delphinus delphis) and bottlenose (Tursiops truncatus) local populations. This study examines impact of increasing underwater noise levels from these boats on vocalizations. Field recordings were conducted June to September 2022, analyzing whistles various presence scenarios. The results indicate significant changes whistle-frequency characteristics with presence, including increased start, low, high frequencies, alongside decrease number inflection points modulated whistles. might negatively populations viability, underscoring need for further research. Additionally, improved mitigation strategies may be necessary reduce potential negative effects watching cetacean communication behavior region.

Language: Английский

Citations

1
Insights into Environmental Variables Affecting Seasonal Cetacean Behaviors DOI

Giulia Cipriano,

Carla Cherubini, Pasquale Ricci

et al.

2022 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea), Journal Year: 2024, Volume and Issue: unknown, P. 277 - 282

Published: Oct. 14, 2024

Language: Английский

Citations

1
Whistle characterization of long-beaked common dolphin (Delphinus delphis bairdii) in La Paz Bay, Gulf of California DOI Creative Commons

Óscar Carlón-Beltrán,

Lorena Viloria‐Gómora, Jorge Urbán R.

et al.

PeerJ, Journal Year: 2023, Volume and Issue: 11, P. e15687 - e15687

Published: July 19, 2023

Long-beaked common dolphin (Delphinus delphis bairdii) distribution is limited to the Eastern North Pacific Ocean. Its whistle repertoire poorly investigated, with no studies in Gulf of California. The aim present study characterize whistles this species and compare their parameters different populations. Acoustic monitoring was conducted La Paz Bay, Recordings were inspected spectrogram view Raven Pro, selecting good quality (n = 270). In software Luscinia, contours manually traced obtain frequencies duration. Number steps, inflection points contour type visually determined. We calculated descriptive statistics selected we compared results a dolphins population from Permutational multivariate analysis variance (PERMANOVA) performed test intraspecific variation among groups. mean values (±SD) were: maximum frequency 14.13 ± 3.71 kHz, minimum 8.44 2.58 kHz duration 0.44 0.31 s. Whistles upsweep most ones (34.44%). coefficient (CV) for modulation high (>100%), accordance other on dolphins. Whistle showed significant differences Finally, ending frequencies, recorded lower long-beaked This provides first characterization California it will help future passive acoustic applications area.

Language: Английский

Citations

1
Whistle structure variation between two sympatric dolphin species in the Gulf of California DOI
Simone Antichi,

Manali Rege‐Colt,

Maia Austin

et al.

Hydrobiologia, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

Language: Английский

Citations

0
The Comparison of Whistle Characteristics of Bottlenose Dolphins (Tursiops Truncatus) in the Coast of Montenegro and the Eastern Mediterranean Sea of Turkey: A Preliminary Study DOI

Yarnick Herben,

Evie White,

Irna Huisjes

et al.

2022 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea), Journal Year: 2023, Volume and Issue: unknown, P. 346 - 350

Published: Oct. 4, 2023

The most researched acoustic system belongs to bottlenose dolphins (Tursiops truncatus), however despite their wide, sophisticated, and plastic repertoire, there is still much that unknown about them. This study intends compare the whistle features of in Eastern Mediterranean Sea Turkey Adriatic (in coastal waters Montenegro). information regarding characteristics cetaceans limited, our preliminary will add knowledge. For analysis a total 202 whistles from Montenegro 682 were used. A significant difference between type two countries was found. According PCA test, variables Inflection points High frequency explained more than 80% variation data for Montenegro, this by Center Delta frequency. Rank-Manova showed differences on PC1 PC2. In comparison Turkey, regions had lower average each parameter, with exception number inflection points. can be geographic isolation regions. Efficient conservation management plans created gaining better understanding delphinid bioacoustics, including traits variations different locations under various anthropogenic pressures.

Language: Английский

Citations

0