2020

Waterhouse, L, SA Heppell, CV Pattengill-Semmens, C McCoy, P Bush, BC Johnson, BX Semmens

This paper presents exciting results from the Grouper Moon Project, documenting conservation success for endangered Nassau Grouper. Results of the analysis showed that on both Little Cayman and Cayman Brac in the Cayman Islands, Nassau Grouper spawning aggregations have more than tripled in response to adaptive management by the Cayman Islands government over a decade. On Little Cayman, the aggregating population grew from around 1,200 fish in 2009 to over 7,000 in 2018. The study used a two-pronged approach that included tagging and video census data for monitoring and counting Nassau Grouper populations in an effort to more accurately estimate annual numbers of fish in the population, and thus provide insight into the effects of ongoing conservation efforts. While many governments have enacted regional or seasonal fishing closures in an attempt to allow recovery of overfished stocks of aggregating reef fishes, this is the first study to provide evidence that these measures can be successful across multiple decades.

The paper was authored by a collaborative team of researchers from Reef Environmental Education Foundation (REEF), Cayman Islands Department of Environment, Scripps Institution of Oceanography, and Oregon State University. The Grouper Moon Project represents nearly 20 years of research, monitoring, and outreach efforts, coordinated by REEF and Cayman Islands Department of Environment, in collaboration with researchers from Scripps Institution of Oceanography and Oregon State University. It is the Caribbean’s oldest continuous grouper spawning aggregation research program, and represents one of the most advanced, multi-faceted tropical fisheries research programs in the world. Due to overfishing during spawning, Nassau Grouper have suffered region-wide stock collapse. By the 1980s large aggregations had all but disappeared from the Caribbean region. Of the remaining aggregations, few contained more than 1,000 individuals and the species is currently listed as critically endangered by the International Union for Conservation of Nature. The aggregation on Littl Cayman is the largest known for this endangered reef fish.

Proceedings of the National Academy of Sciences
Jan 2020, 201917132; DOI: 10.1073/pnas.1917132117
2020
Program: 
Grouper Moon Project
Blincow KM, Bush PG, Heppell SA, McCoy CM, Johnson BC, Pattengill-Semmens CV, Heppell SS, Stevens-McGeever SJ, Whaylen L, Luke K, Semmens BX

Much of the science done by the Grouper Moon Project's collaborative research team is focused on gaining a better understanding Nassau Grouper populations in the Cayman Islands through studying their spawning aggregations; however, long-term acoustic tags (tracking pingers) allow us to gather information on how these fish behave at their home reefs outside of the spawning season. Nassau Grouper are known to be solitary and territorial. But during winter full moons, the fish leave their home site and travel, sometimes long distances, to a spawning aggregation, where they stay for up to 14 days. In this study, Grouper Moon scientists used tagging data to look at movement behavior and vertical habitat use. They found that most Nassau Grouper tend to return to the same home reef following spawning, but that the areas occupied at home reefs can change through time. In particular, they found that larger fish tend to occupy deeper areas than smaller fish, and fish will generally move to deeper reef areas over time. They also found that Nassau Grouper are more likely to be active at dawn and dusk than other times of the day, likely due to feeding activities. This information is adding to what we know about this iconic species, and will help support management of Nassau Grouper populations throughout the Caribbean. To find out more about the Grouper Moon Project, visit www.REEF.org/groupermoonproject.

Marine Ecology Progress Series
Vol. 655: 199–214. DOI: https://doi.org/10.3354/meps13516
2020
Program: 
Grouper Moon Project
Allen, GR, MV Erdmann, and MU Mongdong

A new species of shrimpgoby was discovered by active REEF surveyor, Janet Eyre, while conducting REEF surveys in the Misool area of Raja Ampat in January 2019. Janet then communicated with authors, providing images and an exact location of where the fish was sighted, enabling the collection of type specimens. The new species was described and named after Janet - Janet's Shrimpgoby (Tomiyamichthys eyreae).

aqua, International Journal of Ichthyology
26 (1): 1-10
2020
Program: 
Volunteer Fish Survey Project
Pate, JH and AD Marshall

In this paper, researchers from the Marine Megafauna Foundation show strong evidence that South Florida features a nursery ground for manta rays, only the third such special place known for the species. The results are surprising, given the proximity to large numbers of people and human activity. The lead author spent hundreds of hours conducting visual boat-based surveys between Jupiter Inlet and Boynton Beach between June 2016 to November 2019 in order to locate and identify individual manta rays from their color patterns and markings. Through the time period, she identified 59 individuals, and saw several multiple times. While the warm south Florida waters seem conducive to young manta growth, there is a trade-off; 46 percent of the indivudals showed evidence of injury or scarring from boat propellers, fishing equipment, or other unidentified causes. The authors used the REEF Volunteer Fish Survey Project database to establish a baseline of sighting frequency for the species in Florida, and noted a very low frequency of occurence by REEF surveyors (<1% statewide; from approx. 45,000 surveys conducted in Florida since 1993).

Want to learn more? National Geographic coverage on this study

Endangered Species Research
43: 51–64
2020
Program: 
Volunteer Fish Survey Project

2019

CD Harvell, D Montecino-Latorre, JM Caldwell, JM Burt, K Bosley, A Keller, SF Heron, AK Salomon, L Lee, O Pontier, C Pattengill-Semmens, and JK Gaydos

The study used almost 11,000 REEF Volunteer Fish Survey Project surveys collected between California and Alaska between 2006 and 2017 to evaluate the massive decline of the Sunflower Sea Star (Pycnopodia helianthoides). The authors documented a precipitous decline in the important species, primarily linked to the devastating sea star wasting disease epidemic that was wide-spread along the US and Canadian west coast starting in 2013, as well as warming ocean temperatures. In many places, the Sunflower Sea Stars have failed to return. A decline or absence of this species will likely lead to a boom of sea urchins, loss of kelp, and other cascading effects on the ecosystem. The study findings might prompt consideration of listing the species on the Endangered Species List.

A press release is available at http://news.cornell.edu/stories/2019/01/once-abundant-sea-stars-imperile....

This is the third paper that has used REEF data to evaluate the impacts of the wasting disease. The other two are described at these links:  Devastating transboundary impacts of sea star wasting disease on subtidal asteroids (PLoS ONE) and Evidence for a trophic cascade on rocky reefs following sea star mass mortality in British Columbia (PeerJ).

Science Advances
30 Jan 2019 : EAAU7042
2019
Program: 
Volunteer Fish Survey Project
Frehm, VL, PM Gravinese, and LT Toth

This study published by Friends of MacArthur Beach State Park supports previous research suggesting that participation in citizen-science programs can significantly enhance student learning and attitudes about science, while simultaneously promoting environmental stewardship. Since 1995, MacArthur Beach has been participating in REEF's Volunteer Fish Survey Project. In 2012, MacArthur Beach incorporated the REEF surveys into the park’s summer camp curriculum to increase monitoring efforts while also using the program as an educational tool. The utilization of the REEF program in their summer camps provides a valuable, cost-effective way of monitoring the environmental health of its nearshore marine ecosystem, while simultaneously providing the potential to have measurable impacts on the attitudes and actions of the participants. In this study, the authors used the MacArthur Beach summer camp program to quantify student learning gains and changes in attitudes toward the environment through a research-based experiential learning activity. Their findings show that providing students with the opportunity to collect scientific data through citizen-science programs can increase their understanding of local ecosystems, enhance their observation skills, and can improve their understanding of the scientific process.

Florida Scientist
82(4): 112-121
2019
Program: 
Volunteer Fish Survey Project
Wilson KC, BX Semmens, SR Gittings, CV Pattengill-Semmens, and A Širović

This work was presented at the OCEANS19 meeting, and was a result of research done as part of the Grouper Moon Project. More than 800 species of fish produce sound including Red Hind (Epinephelus guttatus), Nassau Grouper (E. striatus), Black Grouper (Mycteroperca bonaci), and Yellowfin Grouper (M. venenosa). Their sounds can be used to monitor these fish and may be a means to estimate abundance if parameters such as source levels, detection probabilities, and cue rates are known. During the week of Nassau Grouper spawning in February 2017, a passive acoustic array was deployed off Little Cayman in the Cayman Islands to study the temporal and spatial dynamics of spawning aggregations of Nassau Grouper and Red Hind, and measure the source levels of the sounds produced by all four species. The localization method was based on hyperbolic localization of cross-correlated time differences of arrival and its accuracy evaluated via simulations and empirical measurements. The high number of localizations at fish spawning aggregations suggests that localization can be used to accurately measure source levels, detection ranges, and other variables needed for density estimation of spawning aggregations.

OCEANS 2019 MTS/IEEE Seattle
2019, pp. 1-7. doi: 10.23919/OCEANS40490.2019.8962663
2019
Program: 
Grouper Moon Project
Safiq, AD, JL Lockwood, and JA Brown

The authors of this study looked at how reef fish community assemblages have changed over time at several sites in Florida. In particular, they looked for evidence of biological homogenization (increasing species similarity between sites), which can alter the ecological function of systems as well as the economic value associated with ecosystems through complex socio-ecological dynamics. The authors used REEF survey data to measure biological homogenization by tracking taxonomic changes over a decade across 13 near-shore sites off the Atlantic coast of Florida. Sites that were closer to populated coastlines, or have been subject to substantial disturbance events, were more likely to show homogenization. Protected reef sites showed little evidence of homogenization. The authors postulated feedback mechanisms between societal values, diver practices, diver experience, and the severity of homogenization. The authors also discuss how baseline knowledge of the ecosystem could influence whether or not people are inspired to take action when baseline community structures change.

From Biocultural Homogenization to Biocultural Conservation (Rozzi et al, eds)
Chapter 18 (pg 289-300)
2019
Program: 
Volunteer Fish Survey Project
Schofield, PJ and L Akins

This paper provides an updated look at non-native marine fishes that have been reported from Florida waters, following up on two previous papers (Semmens et al 2004 and Schofield et al 2009). The paper, co-authored by staff from REEF and the US Geological Survey (USGS), also provides information on Early-detection/Rapid-response (ED/ER) efforts.

In addition to the well-known invasion of non-native lionfish (Pterois volitans and P. miles), there are now 39 other non-native marine fishes that have been documented in Florida. These reports have mostly come in from REEF's Non-Native Species Reporting Program (www.REEF.org/report-exotic-or-invasive-sighting), which are then input to the USGS’s Nonindigenous Aquatic Species database (USGS-NAS). In addition to lionfish, there is one other Indo-Pacific species, Regal Demoiselle (Neopomacentrus cyanomos), that is considered established, along with two other species that have expanded their natural range in the region (Fairy Basslet, Gramma loreto, and Tessellated Blenny, Hypsoblennius invemar). The rest of the species have not yet established populations.

In 1999, REEF established an ED/ER program to mobilize efforts to locate and remove reported non-native species from Florida waters. In collaboration with the USGS and public aquarium institutions (originally the National Aquarium and more recently the Phillip and Patricia Frost Museum of Science), REEF has coordinated the removal of 13 individuals of 9 species from Florida's coastal waters (see list below). An additional 4 species have been removed by other institutions Many of the captured fishes were transferred to public aquaria where they were displayed to provide educational information to the public.

As discussed in Semmens et al (2004), the origin of most non-native fish species sighted in Florida is intentional release by well-meaning home aquarium owners. REEF works with partners, including the Marine Aquarium Societies of North America (MASNA), to conduct outreach with the public on alternatives for responsible disposal of unwanted fishes.

Successful Non-native Fish Removals From Florida Coastal Waters Coordinated by REEF's ED/ER Program

Orbicular Batfish, Platax orbicularis (n = 5)
Humbug Damselfish, Dascyllus aruanus
Chocolate Surgeonfish, Acanthurus pyroferus
Foxface Rabbitfish, Siganus unimaculatus
Spiny Chromis, Acanthochromis polyacanthus
Orangespine Unicornfish, Naso lituratus
Lagoon Triggerfish, Rhinecanthus aculeatus
Yellow Tang, Zebrasoma flavescens
Purple (yellow-tail) Tang, Zebrasoma xanthurum

BioInvasions Records
8(4): 898–910, https://doi.org/10.3391/bir.2019.8.4.18
2019
Program: 
Invasive Species Program

2018

Heery, EC, AY Olsen, BE Feist, and KP Sebens

The authors, Eliza Heery and colleagues at the Seattle Aquarium, NOAA, and the University of Washington, used REEF sightings data on Giant Pacific Octopus (Enteroctopus dofleini) in Washington State to evaluate patterns of occurrence with urbanization. The species is the largest known octopus in the world, and they can reach over 20 feet in length from one tentacle tip to the other. The study objectives were to determine whether the distribution and habitat-use patterns of Giant Pacific Octopus were correlated with urbanization intensity on nearby shorelines in Puget Sound. REEF was instrumental in the study, providing data for a much larger spatial area and longer time period than would otherwise have been available. Heery et al. used REEF data in a series of statistical models and found that urban effects varied with depth. On deeper dives (> 24 m), REEF divers had a higher probability of encountering octopus in more urban locations.

Why might this be? The study's authors conducted additional field surveys to explore two potential explanations. To determine whether food resources played a role, Heery et al. collected middens – piles of shells leftover from past meals of octopus – from octopus dens throughout Puget Sound. Midden piles indicated there were no differences in the diets of urban octopus and rural octopus, suggesting that food resources were not the driver of urban-related distribution patterns. Secondly, they conducted a series of video surveys in sets of adjacent sites where there was a lot versus very little anthropogenic debris (junk). As many recreational divers might have predicted, they found more octopus in locations where there was a lot of junk.

How is this important for science? Past studies in urban ecology have suggested that mesopredators (mid-sized consumers) benefit from urbanization because of the food and shelter resources city environments provide, but those studies have focused exclusively on terrestrial mesopredators (like racoons and coyotes). This is the first study to examine whether marine mesopredators exhibit comparable patterns. It concludes that within certain habitats (deeper zones), octopus are indeed positively correlated with urbanization. Yet it is likely that shelter resources (from junk) rather than food are the driver.

Urban Ecosystems
https://doi.org/10.1007/s11252-018-0742-1
2018
Program: 
Volunteer Fish Survey Project

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