Deleterious behaviors and risks related to close interactions between humans and free-ranging dolphins: A review

Carzon, Pamela; Clua, Eric; Dudzinski, Kathleen M.; Delfour, Fabienne

doi:10.1016/j.biocon.2023.109948

Cited by 10 publications

(8 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, it may be possible to introduce age estimation using faecal samples as well. Even in areas where long‐term individual identification surveys have not been conducted by researchers, activities such as swim‐with‐dolphin programs, scuba diving and wading in close proximity to observation targets have been developed in more than 11 genera of cetaceans, over 54 areas in 32 counties (Carzon et al., 2023). Therefore, there is potential for collaboration with the tourism industry in these areas, where faecal samples could be collected in conjunction with tourism activities.…”

Section: Discussionmentioning

confidence: 99%

Non‐invasive age estimation based on faecal DNA using methylation‐sensitive high‐resolution melting for Indo‐Pacific bottlenose dolphins

Yagi,

Qi,

Arai

et al. 2023

Molecular Ecology Resources

View full text Add to dashboard Cite

Age is necessary information for the study of life history of wild animals. A general method to estimate the age of odontocetes is counting dental growth layer groups (GLGs). However, this method is highly invasive as it requires the capture and handling of individuals to collect their teeth. Recently, the development of DNA‐based age estimation methods has been actively studied as an alternative to such invasive methods, of which many have relied on used biopsy samples. However, if DNA‐based age estimation can be developed from faecal samples, age estimation can be performed entirely non‐invasively. We developed an age estimation model using the methylation rate of two gene regions, GRIA2 and CDKN2A, measured through methylation‐sensitive high‐resolution melting (MS‐HRM) from faecal samples of wild Indo‐Pacific bottlenose dolphins (Tursiops aduncus). The age of individuals was known through conducting longitudinal individual identification surveys underwater. Methylation rates were quantified from 36 samples collected from 30 individuals. Both gene regions showed a significant correlation between age and methylation rate. The age estimation model was constructed based on the methylation rates of both genes which achieved sufficient accuracy (after LOOCV: MAE = 5.08, R2 = 0.33) for the ecological studies of the Indo‐Pacific bottlenose dolphins, with a lifespan of 40–50 years. This is the first study to report the use of non‐invasive faecal samples to estimate the age of marine mammals.

show abstract

Section: Discussionmentioning

confidence: 99%

Non‐invasive age estimation based on faecal DNA using methylation‐sensitive high‐resolution melting for Indo‐Pacific bottlenose dolphins

Yagi,

Qi,

Arai

et al. 2023

Molecular Ecology Resources

View full text Add to dashboard Cite

show abstract

“…Regarding the cetacean-human bond/dependence, there is evidence to suggest that there is a stubborn permanence to the effect of human contact on cetacean behavior that persists despite placement in or a continued existence in the naturalistic conditions of a sea pen or the ocean at large. Wild cetaceans can quickly acclimatize to human feeding, with often deadly results [47,48]. These "begging" behaviors are often learned quickly, can be pervasive, and spread through populations rapidly [49,50] despite the dangers of boat motors, vessel strikes, and willful human abuse [47].…”

Section: Space and Human Interactions: Implications For Housing Healt...mentioning

confidence: 99%

The Cetacean Sanctuary: A Sea of Unknowns

Bruck

2024

Animals

View full text Add to dashboard Cite

Housing cetaceans in netted sea pens is not new and is common for many accredited managed-care facilities. Hence, the distinction between sanctuary and sea pen is more about the philosophies of those who run these sanctuary facilities, the effects of these philosophies on the animals’ welfare, and how proponents of these sanctuaries fund the care of these animals. Here, I consider what plans exist for cetacean sanctuaries and discuss the caveats and challenges associated with this form of activist-managed captivity. One goal for stakeholders should be to disregard the emotional connotations of the word “sanctuary” and explore these proposals objectively with the best interest of the animals in mind. Another focus should be related to gauging the public’s understanding of proposed welfare benefits to determine if long-term supporters of donation-based sanctuary models will likely see their expectations met as NGOs and their government partners consider moving forward with cetacean sanctuary experiments.

show abstract

“…Biodiversity and ecological tourism have undergone phenomenal development over the past several decades as a result of their position as a rapidly growing subsector. Ecotourism has been demonstrated to have adverse impacts on communities at large, including the disappearance of native dialects and traditions in addition to disruptions to society and the economy (Carzon et al, 2023;Zerr et al, 2022). On each continent, historically protected or unprotected biodiverse areas are rapidly becoming accessible to ecotourists.…”

Section: Introductionmentioning

confidence: 99%

The Indian Case for Ecotourism and Environmental Migrants

Sharma,

Kumar

2023

EEC

View full text Add to dashboard Cite

Regardless of the reality the ecotourism has a substantial influence, particularly in developing nations like India, the actual circumstances of wildlife protection in India are exceedingly confusing. These conservation operations spread positive luck including adverse outcomes (for local tribal populations due to livelihood threats and displacement for conservation), making protected areas controversial despite their importance. Conservation refugees in India are people who have been compelled to leave their houses due to the development of designated areas; these people are the actual victims of environmental expropriation. The past history of conservation attempts excluding native populations in designated areas is one of the most significant barriers to conservation today. Tribal communities are paying a high price to expand safari, construct wildlife preserves, and attract visitors. Recent efforts in India to forcefully remove up to 9 million indigenous people with deep historical and spiritual ties to the land and environment have met with fierce opposition. Preserving biodiversity at the price of displacing local populations, on the other hand, could be counterproductive. The social and economic and political ramifications of India’s position as a developing country with a huge population hinder the country from embracing the concept of pure nature preservation schemes. Developing and sustaining successful multilayered rules for protected areas necessitates transparency regarding the expenses and advantages of these regulations, as well as an eagerness to communicate this knowledge with those who endure the consequences.

show abstract

Deleterious behaviors and risks related to close interactions between humans and free-ranging dolphins: A review

Cited by 10 publications

References 96 publications

Non‐invasive age estimation based on faecal DNA using methylation‐sensitive high‐resolution melting for Indo‐Pacific bottlenose dolphins

Non‐invasive age estimation based on faecal DNA using methylation‐sensitive high‐resolution melting for Indo‐Pacific bottlenose dolphins

The Cetacean Sanctuary: A Sea of Unknowns

The Indian Case for Ecotourism and Environmental Migrants

Contact Info

Product

Resources

About