Surface drifter movement indicates onshore egg transport from a reef fish spawning aggregation

Mendez-Jimenez, Adriana; Heyman, William D.; DiMarco, Steven F.

doi:10.1080/02723646.2015.1023243

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…Additionally, we seek linkages between oceanographic and biological connectivity of the Pulley Ridge mesophotic reef, centering on surface dwelling pelagic larvae. Unlike prior use of drifter trajectory data in the study of connectivity (e.g., Carrillo et al, ; Lugo‐Fernandez et al, ; Méndez‐Jiménez et al, ), we consider a larger collection of drifters and further do not restrict attention to those drifters that happened to visit, or were deployed within, Pulley Ridge. In particular, a discrete transfer operator (Dellnitz et al, ; Froyland, ; Miron et al, ) is constructed using the totality of the drifter trajectories in the GoM to study its oceanographic connectivity in a statistical sense.…”

Section: Introductionmentioning

confidence: 99%

Connectivity of Pulley Ridge With Remote Locations as Inferred From Satellite‐Tracked Drifter Trajectories

et al. 2018

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Using historical (1994–2017) satellite‐tracked surface drifter trajectory data, we conduct a probabilistic Lagrangian circulation study which sheds light on the connectivity of Pulley Ridge with other locations in the Gulf of Mexico and adjacent areas. The analysis reveals that Pulley Ridge is connected with the North Atlantic, the Caribbean Sea, and most of the Gulf of Mexico. Preferred connecting pathways are identified and arrival times to potential reef sites computed. The study demonstrates the importance of Pulley Ridge as a source for neighboring regions like the Dry Tortugasa, the Florida Keys, Campeche Bank, and the east Florida coast as well as a self‐recruitment area for species with short competence time. The study further suggests that the reefs in the Caribbean Sea, the Dry Tortugas, the western Florida Keys, and the West Florida Shelf can act as sources for Pulley Ridge, indicating the importance of Pulley Ridge as a central refugium for species in the Gulf of Mexico.

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Section: Introductionmentioning

confidence: 99%

Connectivity of Pulley Ridge With Remote Locations as Inferred From Satellite‐Tracked Drifter Trajectories

et al. 2018

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“…Among many methods used to quantify dispersal [4,16], releasing drogued drifters is an attractive option for reef fish that form large spawning aggregations. In these cases, all annual reproductive output may be released over only 2-4 days and from well-defined spatial locations that are consistent across years [38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Protected fish spawning aggregations as self-replenishing reservoirs for regional recovery

et al. 2023

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Dispersal of eggs and larvae from spawning sites is critical to the population dynamics and conservation of marine fishes. For overfished species like critically endangered Nassau grouper ( Epinephelus striatus ), recovery depends on the fate of eggs spawned at the few remaining aggregation sites. Biophysical models can predict larval dispersal, yet these rely on assumed values of key parameters, such as diffusion and mortality rates, which have historically been difficult or impossible to estimate. We used in situ imaging to record three-dimensional positions of individual eggs and larvae in proximity to oceanographic drifters released into egg plumes from the largest known Nassau grouper spawning aggregation. We then estimated a diffusion–mortality model and applied it to previous years' drifter tracks to evaluate the possibility of retention versus export to nearby sites within 5 days of spawning. Results indicate that larvae were retained locally in 2011 and 2017, with 2011 recruitment being a substantial driver of population recovery on Little Cayman. Export to a nearby island with a depleted population occurred in 2016. After two decades of protection, the population appears to be self-replenishing but also capable of seeding recruitment in the region, supporting calls to incorporate spawning aggregation protections into fisheries management.

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In situ spawning in a marine broadcast spawner, the Pacific oyster C rassostrea gigas : Timing and environmental triggers

et al. 2016

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The precise environmental conditions under which broadcast spawners spawn in the field remain largely unknown. We investigated this issue in the oyster Crassostrea gigas using three different methods at different time scales in two traditional oyster farming areas of the French Atlantic Coast, the Bay of Arcachon and Marennes-Ol eron. We directly recorded spawning at high temporal resolution using high-frequency noninvasive (HFNI) valvometry from 2007-2014 and measured the dry mass and oyster larvae abundance in 2008 and 2009. We analyzed a 29-yr series of oyster D-larvae numbers in the Bay of Arcachon (1982Arcachon ( -2010. By combining these three approaches, we demonstrated that during the summer months at both sites, spawning in C. gigas occurs in the morning or during the evening, essentially at high tide of perigean spring tides, independent of the positions of these oysters, above or below the lowest water level. We characterized the associated water currents at the spawning location in the Bay of Arcachon and observed that spawning systematically occurs during the early phase of a water current peak, at the beginning of ebbing. We propose that this water current peak acts as a final trigger for spawning. These results have ecological consequences associated with gamete encounters and the dispersal of fertilized eggs (zygotes).

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Surface drifter movement indicates onshore egg transport from a reef fish spawning aggregation

Cited by 5 publications

References 41 publications

Connectivity of Pulley Ridge With Remote Locations as Inferred From Satellite‐Tracked Drifter Trajectories

Connectivity of Pulley Ridge With Remote Locations as Inferred From Satellite‐Tracked Drifter Trajectories

Protected fish spawning aggregations as self-replenishing reservoirs for regional recovery

In situ spawning in a marine broadcast spawner, the Pacific oyster C rassostrea gigas : Timing and environmental triggers

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