Movement patterns of young Caribbean reef sharks, Carcharhinus perezi, at Fernando de Noronha Archipelago, Brazil: the potential of marine protected areas for conservation of a nursery ground

2005 ◽  
Vol 149 (2) ◽  
pp. 189-199 ◽  
Author(s):  
Ricardo C. Garla ◽  
Demian D. Chapman ◽  
Bradley M. Wetherbee ◽  
Mahmood Shivji
2018 ◽  
Author(s):  
Priscila Lopes ◽  
Sebastian Villasante

Ecosystems services (ES) provide food and recreation to humans, but are fast being degraded. Marine Protected Areas (MPAs) have been proposed as a way to protect some of these ES, but decisions regarding what gets protection and what gets consumed can be a source of conflicts. One such example is the Fernando de Noronha MPA (Brazil), where there is a conflict between shark-directed tourism and fishers who would like to access the no-take part of the MPA during part of the year. A contingent valuation method (Willingness to Pay) was used to ascertain if tourists would accept compensating fishers for not disturbing the sharks during a specific period of the year, by adding a symbolic increase in the taxes they already pay to either visit the island or to visit the no-take part of the MPA. Tourists were open to this alternative (67-71%), regardless of the fee being paid. However, there was a slight tendency to reject the fee when the tourists saw sharks during their stay, suggesting that a closer contact with these animals triggered a less sympathetic attitude towards fishers, probably because they start seeing fishers as wrongdoers, even if this is the worst choice for conservation. Although such a hypothetical payment was easily accepted by the majority of the tourists and could represent an affordable solution to conflicts, convincing those who reject such social compensation, especially if based on an irrational choice, would be an important step for sharks and for the MPA as a whole.


2013 ◽  
Vol 64 (4) ◽  
pp. 359 ◽  
Author(s):  
Kira R. Withy-Allen ◽  
Kevin A. Hovel

The effectiveness of conservation efforts, including marine protected areas (MPAs), hinges on adequate knowledge of movement patterns, habitat associations and habitat-specific survival rates of mobile organisms. California spiny lobsters (Panulirus interruptus) support commercial and recreational fishing in southern California; however, we lack basic information to determine whether MPAs planned for the region will enhance abundance. Working within and outside a small southern California MPA, we (1) quantified the movement patterns and home ranges of the lobster over two time scales, (2) determined lobster day and night habitat associations and (3) determined habitat-specific predation risk. Lobsters exhibited high site fidelity and small home ranges (geometric mean of 651 m2 and 5912 m2 per week, on the basis of 50% and 95% kernel utilisation distributions, respectively). Lobsters were associated with rocky habitat during the day and with the red algae Plocamium cartilagineum while feeding at night. Relative survival rates of lobsters were high across vegetated and unvegetated habitats at night, and were highest in surfgrass (Phyllopsadix torreyi) habitat during the day. Our results highlight the need to consider how movement patterns vary over short and long time scales, and how habitat use may vary from day to night for nocturnally active species such as lobsters, when planning MPAs.


2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Diana M. Beltrán ◽  
Nikolaos V. Schizas ◽  
Richard S. Appeldoorn ◽  
Carlos Prada

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lucas Bonnin ◽  
David Mouillot ◽  
Germain Boussarie ◽  
William D. Robbins ◽  
Jeremy J. Kiszka ◽  
...  

AbstractDramatic declines in reef shark populations have been documented worldwide in response to human activities. Marine Protected Areas (MPAs) offer a useful mechanism to protect these species and their roles in coral reef ecosystems. The effectiveness of MPAs notably relies on compliance together with sufficient size to encompass animal home range. Here, we measured home range of 147 grey reef sharks, Carcharhinus amblyrhynchos, using acoustic telemetry in New Caledonia. The distribution of home range was then compared to local MPA sizes. We report a home range of 12 km2 of reef for the species with strong differences between adult males (21 km2), adult females (4.4 km2) and juveniles (6.2 km2 for males, 2.7 km2 for females). Whereas local historic MPA size seemed adequate to protect reef shark home range in general, these were clearly too small when considering adult males only, which is consistent with the reported failure of MPAs to protect sharks in New Caledonia. Fortunately, the recent implementation of several orders of magnitude larger MPAs in New Caledonia and abroad show that recent Indo-Pacific MPAs are now sufficiently large to protect the home ranges of this species, including males, across its geographical range. However, protection efforts are concentrated in a few regions and cannot provide adequate protection at a global scale.


2016 ◽  
Vol 548 ◽  
pp. 263-275 ◽  
Author(s):  
RE Lindsay ◽  
R Constantine ◽  
J Robbins ◽  
DK Mattila ◽  
A Tagarino ◽  
...  

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