I am a lecturer in the Department of Biology of the University of Miami. I am also a recent graduate from here. I worked in Steve Green's Animal Behavior lab. My research interests are mostly in applying the principles of behavioral ecology to marine and benthic ecology. I study the effects of of environment and ecology on mate choice, the evolution of social systems, the ecology of parasitism, and grazing ecology. Believe it or not, although these fields seem disparate, they are all very much interlinked! I am also interested in conservation biology. Much of my current research focuses on reef fishes as model organisms; they are great to work with because of their diversity and visibility. I am interested in and have worked on many different animals, however, particularly crustaceans and sea urchins.

Stegastes partitus
male with Anilocra
partiti parasite
For my dissertation, I examined the relationship between the large external isopod parasite, Anilocra partiti, and its host, the bicolor damselfish, Stegastes partitus. The bicolor damselfish is an extremely common reef fish in the western Atlantic and has been very well-studied. The parasitic genus Anilocra is widespread and common, but relatively little is known about them. You might have seen them resembling psychotic lobsters or pillbugs attached to the head or body of reef fishes. This particular species of Anilocra is endemic to Jamaica. For my dissertation I looked at the effect of A. partiti on the ecology, behavior and reproductive biology of its damselfish host. This research is on-going and I am currently beginning comparative analyses of fish and Anilocraecology and social systems.

bites in seagrass (Thalassia testudium) made by parrotfish
Another area of interest is the ecology and behavior of seagrass fishes. Although seagrasses are often thought to be pretty homogenous habitats to the organisms that live in them, parrotfish grazing can be very heterogeneous over scales as small as 10m. My wife, Silvia Maciá, and I examined grazing patterns of parrotfishes relative to blowouts (bare depressions in the sand) and found that large parrotfishes preferentially feed close to these blowouts. We are continuing our examination of the effects of habitat structure on the social systems of seagrass fishes.

transplanting the reef urchin Diadema antillarum
Note the algae on the reef in the background.
I am also interested in applying ecological and behavioral principles to conservation biology. My wife and I did a study on the reef urchin Diadema antillarum in Jamaica. In 1983-4 99% of these urchins died from a disease. We manipulated urchin densities and saw an increase in herbivory and a decrease in algal cover. We also observed the dispersal behavior of the Diadema. We hope to apply our observations on a larger scale to help the Jamaican reefs recover to their state before the Diadema died off.
I did my MS at the University of South Florida in Tampa. I worked on the ontogeny of
feeding kinematics in the nurse shark, Ginglymostoma cirratum, in Phil
Motta’s laboratory at USF and at the Center
for Shark Research at the Mote Marine Laboratory
in Sarasota. I have also worked on the ultrastructure of the sperm of
reef fishes and the aggression and territoriality in damselfishes in Jamaica. I performed all of the ultrastructural,
electron microscopy work at the Dauer
Electron Microscopy Laboratory of the University of Miami. For future research I plan on continuing
with marine and behavioral ecology, particularly of reef fishes. I would also like to continuing applying
my research in a more applied sense, too, using behavior to assist with marine
conservation, for example. I've done most of my research at
the Hofstra
University Marine Laboratory in St. Ann’s Bay, Jamaica. This lab is about
13 km west of Ocho Rios. I was recently resident director of this lab. It
was a lot of fun working there, teaching and assisting with visiting classes,
and it provided a unique opportunity to do research. If you are interested in a job,
doing research or taking a class there, feel free to ask me any questions!
filming a nurse shark at
Sea World, FL
Publications
Maciá, S., MPR & A. Nalevanko (2007) Experimental dispersal of recovering Diadema antillarum increases grazing intensity and reduces macroalgal abundance on a coral reef. Mar. Ecol. Prog. Ser. 348: 173-182 - download pdf
Maciá, S. & MPR (2005) Effects of habitat heterogeneity in seagrass beds on grazing patterns of parrotfishes. Mar. Ecol. Prog. Ser. 303: 113-121 - download pdf
Maciá, S., MPR, P. Craze, R. Dalton, & J.D. Thomas (2004) New observations on airborne jet propulsion (flight) in squid, with a review of previous reports. J. Moll. Stud. 70: 297-299. - download pdf
MPR & J.S. Prince (2003) Morphology of the sperm of two wrasses, Thalassoma bifasciatum and Lachnolaimus maximus (Labridae, Perciformes). Bull. Mar. Sci. 72(1): 247-252. - download pdf
MPR & P.J. Motta (2002) Patterns of growth and the effects of scale on the feeding kinematics of the nurse shark (Ginglymostoma cirratum). J. Zool., Lond. 256: 449-462. - download pdf