Publications by authors named "Gustavo Cardenas Hinojosa"
Widespread use of unregulated acoustic technologies in maritime industries raises concerns about effects on acoustically sensitive marine fauna worldwide. Anthropogenic noise can disrupt behavior and may cause short- to long-term disturbance with possible population-level consequences, particularly for animals with a limited geographic range. Ultrasonic antifouling devices are commercially available, installed globally on a variety of vessel types, and are marketed as an environmentally-friendly method for biofouling control.
View Article and Find Full Text PDFBaseline knowledge of spatial and temporal distribution patterns is essential for cetacean management and conservation. Such knowledge is particularly important in areas where gillnet fishing occurs, as the Upper Gulf of California, which increases the probability of bycatch of cetaceans. In this area, the vaquita porpoise () has been widely studied, but the knowledge of other cetaceans is scarce and based on traditional visual survey methods.
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- The vaquita is a critically endangered porpoise found only in Mexico, facing severe population decline primarily due to bycatch in gillnets.
- Despite a gillnet ban implemented in 2015, the population has continued to plummet, with estimates showing a 98.6% decline since 2011, leaving fewer than 19 individuals by the summer of 2018.
- Ongoing illegal gillnet use remains a significant threat, necessitating urgent management initiatives to prevent the species from going extinct.
The vaquita is a critically endangered species of porpoise. It produces echolocation clicks, making it a good candidate for passive acoustic monitoring. A systematic grid of sensors has been deployed for 3 months annually since 2011; results from 2016 are reported here.
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- - The vaquita is the most endangered marine mammal, with around 245 individuals left in 2008, primarily due to bycatch in gillnets used for illegal fishing of the totoaba fish, which is highly valued in the wildlife trade.
- - Population monitoring is challenging because vaquitas are hard to see; however, acoustic detectors revealed an 80% decline in their echolocation activity from 2011 to 2015, indicating a drastic decrease in their population.
- - In response to these alarming findings, the Mexican government implemented a two-year gillnet ban in the vaquita's habitat to prevent extinction, costing about $74 million to compensate affected fishers, highlighting the importance of ongoing monitoring for