Songs of humpback whales &lt;i&gt;Megaptera novaeangliae&lt;/i&gt; in the Ryukyu and Bonin regions

Maeda, H.; Higashi, Naoto; Uchida, Senzou; Satô, Fumihiko; Yamaguchi, Manami; Koido, Takashi; Takemura, Akira

doi:10.3106/mammalstudy.25.59

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…In one study (Maeda et al . ), what appeared to be similar themes in two different regions were mistakenly treated as different themes; the analyses of theme presence and evolution were therefore incomparable between the two regions, complicating interpretation of the results.…”

Section: Review Of Song Structure Definitions and Criteriamentioning

confidence: 99%

“…Similar themes in different adjacent regions (i.e., where the potential for acoustic interaction exists) should be labeled as such, regardless of their position within the song sequence or the presence or absence of other themes. In one study (Maeda et al 2000), what appeared to be similar themes in two different regions were mistakenly treated as different themes; the analyses of theme presence and evolution were therefore incomparable between the two regions, complicating interpretation of the results.…”

Section: Yearmentioning

confidence: 99%

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Humpback whale song hierarchical structure: Historical context and discussion of current classification issues

Cholewiak

Sousa‐Lima²,

Cerchio

2012

Marine Mammal Science

141

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Consistent and well‐defined criteria for the classification and measurement of humpback whale song features are essential for robust comparisons between investigators. Song structure terminology has been well‐established and used by many authors, though at times inconsistently. This review discusses the development of the nomenclature describing humpback song and explores the potential significance of the often‐overlooked variation in song patterns. Within the hierarchical definition of humpback song, the most problematic issues arise from the inconsistent delineation of phrase types, and the use of the metric of song duration without regards to variability in thematic sequence. With regards to the former, a set of guidelines is suggested to facilitate consistent delineation of phrases. With regards to the latter, current research demonstrates that the “song duration” metric has resulted in the disregard of variability at this level, which is more widespread than traditionally reported. An exemplar case is used to highlight the problem inherent in defining and measuring song duration. Humpback song is evaluated within the framework of avian songbird research, and a shift in analysis paradigm is recommended, towards phrase‐based analyses in which sequences of phrases are treated as a salient feature of song pattern.

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Section: Review Of Song Structure Definitions and Criteriamentioning

confidence: 99%

Section: Yearmentioning

confidence: 99%

Humpback whale song hierarchical structure: Historical context and discussion of current classification issues

Cholewiak

Sousa‐Lima²,

Cerchio

2012

Marine Mammal Science

141

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“…Singing is also a major activity of humpback whales in Okinawa during the breeding season. Maeda et al (2000) studied the composition of humpback whale song in Okinawa, however, diel patterns in singing activity had not been studied in this region. In this study, 24 hr recording with a fixed hydrophone, and vessel-based sighting surveys were conducted to study the behavior of singers in the breeding area around Okinawa, Japan.…”

Section: Introductionmentioning

confidence: 99%

Diel patterns in singing activity of humpback whales in a winter breeding area in Okinawan (Ryukyuan) waters

Kobayashi

Okabe

Higashi

et al. 2021

Marine Mammal Science

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Male humpback whales produce complex sounds known as songs during their breeding season. Previous studies have shown diel patterns of song in their breeding areas, but there had been no similar studies in the breeding area around Okinawa, Japan. To study diel patterns of song and the behavior of humpback whales in Okinawa, we conducted 24 hr recording with a fixed hydrophone in 2007, and vessel‐based sighting surveys during 2014–2017. Song was monitored for 15 days, with peaks at sunrise and around 2200. Singing activity declined significantly between sunrise and sunset, then increased until 2200. Activity levels at night were higher and more stable than during the day. During 278 days of sighting surveys, 2,551 whales in 1,382 groups were observed. 79 individuals were confirmed as singers, all of which were lone whales. In six cases, singing individuals stopped singing before joining a group or began singing after leaving a group. Previous studies have shown that group size of humpback whales increases through the day. Considering the results from our study and the former studies, the decrease in singing activity as the day progresses may be a result of aggregation increasing, thus reducing the number of lone singers during the day.

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The Spreading Message in a Noisy World: Song Behavior and Acoustic Ecology in Humpback Whales (Megaptera novaeangliae), from the Southwestern Atlantic Ocean

Rossi‐Santos

2017

Advances in Marine Vertebrate Research in Latin America

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Songs of humpback whales <i>Megaptera novaeangliae</i> in the Ryukyu and Bonin regions

Cited by 4 publications

References 17 publications

Humpback whale song hierarchical structure: Historical context and discussion of current classification issues

Humpback whale song hierarchical structure: Historical context and discussion of current classification issues

Diel patterns in singing activity of humpback whales in a winter breeding area in Okinawan (Ryukyuan) waters

The Spreading Message in a Noisy World: Song Behavior and Acoustic Ecology in Humpback Whales (Megaptera novaeangliae), from the Southwestern Atlantic Ocean

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