The History of Cetacean Hunting and Changing Attitudes to Whales and Dolphins

Parsons, E. C. M.; Rose, Naomi A.

doi:10.1007/978-3-030-98100-6_7

Cited by 4 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The near cessation of commercial whaling removed 1 of the major threats influencing extinction risk for baleen whales and the sperm whale (Parsons & Rose, 2022). Hunting of whales and small cetaceans still occurs in many countries, and although generally direct takes of cetaceans are at substantially lower levels than previously, many ongoing hunts of small cetaceans are likely to be unsustainable (Altherr & Hodgins, 2018).…”

Section: Factors Affecting Cetacean Extinction Riskmentioning

confidence: 99%

Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

Braulik

Taylor

Minton

et al. 2023

Conservation Biology

View full text Add to dashboard Cite

To understand the scope and scale of the loss of biodiversity, tools are required that can be applied in a standardized manner to all species globally, spanning realms from land to the open ocean. We used data from the International Union for the Conservation of Nature Red List to provide a synthesis of the conservation status and extinction risk of cetaceans. One in 4 cetacean species (26% of 92 species) was threatened with extinction (i.e., critically endangered, endangered, or vulnerable) and 11% were near threatened. Ten percent of cetacean species were data deficient, and we predicted that 2–3 of these species may also be threatened. The proportion of threatened cetaceans has increased: 15% in 1991, 19% in 2008, and 26% in 2021. The assessed conservation status of 20% of species has worsened from 2008 to 2021, and only 3 moved into categories of lesser threat. Cetacean species with small geographic ranges were more likely to be listed as threatened than those with large ranges, and those that occur in freshwater (100% of species) and coastal (60% of species) habitats were under the greatest threat. Analysis of odontocete species distributions revealed a global hotspot of threatened small cetaceans in Southeast Asia, in an area encompassing the Coral Triangle and extending through nearshore waters of the Bay of Bengal, northern Australia, and Papua New Guinea and into the coastal waters of China. Improved management of fisheries to limit overfishing and reduce bycatch is urgently needed to avoid extinctions or further declines, especially in coastal areas of Asia, Africa, and South America.

show abstract

Section: Factors Affecting Cetacean Extinction Riskmentioning

confidence: 99%

Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

Braulik

Taylor

Minton

et al. 2023

Conservation Biology

View full text Add to dashboard Cite

show abstract

“…They can not only improve primary productivity (Henley et al, 2020), but also regulate carbon dioxide in the atmosphere and marine environment (Roman et al, 2016). Since the moratorium on commercial whaling in 1986, the global whale population has continued grown, with a concomitant increase in the frequency of the whale stranding (Parsons and Rose, 2022), which has attracted widespread attention. In 2020, Klaus pointed out the whale stranding typically occur during their migrations (Vanselow, 2020).…”

Section: Introductionmentioning

confidence: 99%

An acoustic tracking model based on deep learning using two hydrophones and its reverberation transfer hypothesis, applied to whale tracking

Jin,

Xu,

Zhang

et al. 2023

Front. Mar. Sci.

View full text Add to dashboard Cite

Acoustic tracking of whales’ underwater cruises is essential for protecting marine ecosystems. For cetacean conservationists, fewer hydrophones will provide more convenience in capturing high-mobility whale positions. Currently, it has been possible to use two hydrophones individually to accomplish direction finding or ranging. However, traditional methods only aim at estimating one of the spatial parameters and are susceptible to the detrimental effects of reverberation superimposition. To achieve complete whale tracking under reverberant interference, in this study, an intelligent acoustic tracking model (CIAT) is proposed, which allows both horizontal direction discrimination and distance/depth perception by mining unpredictable features of position information directly from the received signals of two hydrophones. Specifically, the horizontal direction is discriminated by an enhanced cross-spectral analysis to make full use of the exact frequency of received signals and eliminate the interference of non-source signals, and the distance/depth direction combines convolutional neural network (CNN) with transfer learning to address the adverse effects caused by unavoidable acoustic reflections and reverberation superposition. Experiments with real recordings show that 0.13 km/MAE is achieved within 8 km. Our work not only provides satisfactory prediction performance, but also effectively avoids the reverberation effect of long-distance signal propagation, opening up a new avenue for underwater target tracking.

show abstract

Interactions between Cetaceans (suborder Odontoceti) and Artisanal Fishing in Brazil: an ethnoecological approach

Carvalho,

Antonio da Silva Souto,

Evaldo de Lira Azevedo

2024

Ethnobio Conserv

View full text Add to dashboard Cite

Studies based on the relationship between humans and the natural environment have been proven to be important tools for understanding the influence, knowledge, and perceptions associated with the web of interactions between humans, species and ecosystems. Here, we highlight the interactions between cetaceans and artisanal fishing. Thus, this study aimed to: a) compile studies that consider artisanal fishing and its interactions with small cetaceans in Brazil; b) understand research trends over the years; c) analyse the distribution of studies by country region; d) perform authorship and citation analyses; e) classify the interactions between cetaceans and artisanal fishing recorded by authors and f) identify dolphin species registered in the study. To achieve this, we reviewed the current status of national publications related to the interactions of cetaceans (suborder Odontoceti) with artisanal fishing in Brazil, focusing on ethnoecological studies. Seven databases were used to survey the studies. To classify the interactions, we adopted the categorization proposed by Freitas-Netto and adapted by Di Beneditto. Based on the data analysis, we registered 12 types of interactions, seven of which were grouped according to the descriptions proposed by Di Beneditto and five new categories were described based on the results of this study. The studies reported the interaction of 43.2% (n=16) of the 37 odontocete species reported to occur in Brazil, with emphasis on the species Sotalia guianensis, Tursiops truncatus, Pontoporia blainvillei, Inia geoffrensis and Sotalia fluviatilis. From our research it was possible to observe that ethnoecological studies allow us to answer important questions about the occurrence of species and aspects of fishing. Furthermore, we reinforce the importance of developing studies which focus on the knowledge of the existing relationships between cetaceans and traditional fishing methods, since studies on this topic can generate data that contribute to the establishment of mitigation strategies and the management of species and ecosystems.

show abstract

The History of Cetacean Hunting and Changing Attitudes to Whales and Dolphins

Cited by 4 publications

References 51 publications

Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

An acoustic tracking model based on deep learning using two hydrophones and its reverberation transfer hypothesis, applied to whale tracking

Interactions between Cetaceans (suborder Odontoceti) and Artisanal Fishing in Brazil: an ethnoecological approach

Contact Info

Product

Resources

About