Successful sexual reproduction of the scleractinian coral Porites panamensis: Evidence of planktonic larvae and recruitment

• Published in: Invertebrate biology 2019-03, Vol.138 (1), p.29-39
• Main Authors: Santiago‐Valentín, Jeimy D., Rodríguez‐Troncoso, Alma P., Bautista‐Guerrero, Eric, López‐Pérez, Andrés, Cupul‐Magaña, Amilcar L.
• Format: Article
• Language: English
• Subjects: Adults; Animal reproduction; Artificial substrata; Breeding success; coral recruitment; Coral reefs; Corals; Cytochrome; Cytochromes; Dispersal; Eastern Tropical Pacific; Endemic species; Genetic diversity; Genetic variation; Genotypes; Larvae; Lipids; Mitochondria; molecular markers; Phylogeny; Population studies; Porites panamensis; Recruitment; Recruitment (fisheries); Reproduction; Reproduction (biology); Reproductive behavior; Reproductive behaviour; reproductive ecology; rRNA 18S; Sexual reproduction; Substrates; Threatened species; Tropical climate; Vacuoles; Water column
• ISSN: 1077-8306; 1744-7410
• DOI: 10.1111/ivb.12235

Porites panamensis is a hermatypic brooder coral endemic to, and distributed along, the Eastern Tropical Pacific, and is considered a species vulnerable to local effects because it has limited capacity for long‐distance dispersal (and low genetic diversity). Although larvae of P. panamensis have been previously shown to recruit to artificial settlement platforms, they have never been observed in the water column. The present study describes the reproductive behavior of P. panamensis, with a focus on using molecular tools to document evidence for a larval planktonic stage and for successful recruitment. Larvae collected from the water column, and recruitment on natural and artificial substrata were documented. Phylogenetic analysis of two ribosomal markers, 18s rRNA and ITS (ITS1‐5.8‐ITS2), and one mitochondrial marker, cytochrome oxidase subunit 1 (cox1), confirmed the taxonomic identity of larvae, and showed that larvae and recruits have genotypes similar to adults of P. panamensis. Lipid vacuoles and Symbiodinium sp. were present in the gastrodermis of all larvae. A total of 12 and 371 recruits settled on artificial and natural substrates, respectively, and the recruitment rate differed significantly over time. By documenting the reproductive success of the species, we show the potential for existing individuals both to maintain the population in the study area and to contribute to maintenance of the coral reef community in the coming decades.