scholarly journals Widespread hybridization and bidirectional introgression in sympatric species of coral reef fish

2017 ◽  
Vol 26 (20) ◽  
pp. 5692-5704 ◽  
Author(s):  
Hugo B. Harrison ◽  
Michael L. Berumen ◽  
Pablo Saenz-Agudelo ◽  
Eva Salas ◽  
David H. Williamson ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Sympatric Species

Evolution of sympatric species: a case study of the coral reef fish genus Pomacanthus (Pomacanthidae)

2013 ◽  
Vol 40 (9) ◽  
pp. 1676-1687 ◽  
Author(s):  
Jennifer R. Hodge ◽  
Charmaine I. Read ◽  
David R. Bellwood ◽  
Lynne van Herwerden
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Sympatric Species

Maneuverability of four species of coral-reef fish that differ in body and pectoral-fin morphology

1999 ◽  
Vol 77 (7) ◽  
pp. 1102-1110 ◽  
Author(s):  
Cynthia L Gerstner
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Sympatric Species ◽  
Locomotor Performance ◽  
Behavioral Differences ◽  
Thalassoma Bifasciatum ◽  
Pectoral Fin ◽  
Stegastes Leucostictus ◽  
Morphological Differences

Maneuverability was measured during feeding and agonistic interactions in four sympatric species of coral-reef fish differing in body and pectoral-fin morphology: foureye butterflyfish, Chaetodon capistratus (deep body, low aspect ratio (AR) fins), beaugregory damselfish, Stegastes leucostictus (medium-depth body, low AR fins), ocean surgeonfish, Acanthurus bahanieusis (medium-depth body, high AR fins), and bluehead wrasse, Thalassoma bifasciatum (slender body, high AR fins). Damselfish turned faster, using median- and paired-fin propulsion, than either surgeonfish or wrasse, but their performance did not differ from that of butterflyfish during maneuvering behaviours common to all species. Each of these pairs had similar pectoral-fin morphology but exhibited an intermediate body morphology. This suggests that pectoral-fin morphology was more important in determining performance within maneuvers, and therefore butterflyfish and damselfish were superior maneuverers to surgeonfish or wrasse. To turn faster, fish shifted from median- and paired-fin propulsion to body and caudal-fin propulsion; however, turning radii were unaffected. Pectoral-fin morphology also determined the use of maneuvering behaviours within gaits that are used by fish to fractionate their locomotor-performance range. In general, morphological differences among species were correlated more often with behavioral differences than with locomotor performance. Fish differing in body and fin morphology express different gaits, and within these gaits, they express different behaviours; however, overall performance may converge.

scholarly journals Year-round high abundances of the world’s smallest marine vertebrate (Schindleria) in the Red Sea and worldwide associations with lunar phases

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vanessa Robitzch ◽  
Victor Molina-Valdivia ◽  
Jaiber J. Solano-Iguaran ◽  
Mauricio F. Landaeta ◽  
Michael L. Berumen
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Red Sea ◽  
Coral Reef Fish ◽  
Seasonal Temperature ◽  
Global Trends ◽  
Lunar Phases ◽  
Spatial Differences ◽  
New Moon ◽  
Reproductive Cycles

AbstractVery little is known about the ecology and biology of the smallest marine vertebrates, fishes in the genus Schindleria. Even though over half of named Schindleria species have been identified in the Red Sea, the collection of only very few specimens has been documented. Here, we assessed abundance patterns of nearly two thousand Red Sea long dorsal fin (LDF) adults and found evidence for putative seasonal and spatial differences, likely related to differing habitat and environmental conditions. The highest abundances were outside local seasonal temperature extremes and decoupled from peaks of coral reef fish recruitment. We also found evidence for global trends in abundances related to lunar cycles using our Red Sea data and that from a recently published large collection of specimens from the DANA Expedition (1928–1930). The abundance of adult LDF Schindleria in relation to lunar phases differed significantly, with most Schindleria caught outside the full moon, and mostly during the new moon in the Red Sea and the 3rd quarter moon in the DANA collection. We further suggest that the abundances of Schindleria at coral reefs may be related to reproductive cycles and that these cycles may be timed with the moon as back-calculations of hatch dates from otoliths from the Red Sea significantly resulted after the new moon, making Schindleria the fastest-lived coral reef fish with the shortest generation times. Schindleria could be the most numerous coral reef fish in the world, for which we encourage increased research.

scholarly journals Impact of cyclones on hard coral and metapopulation structure, connectivity and genetic diversity of coral reef fish

Coral Reefs ◽  
2021 ◽  
Author(s):  
Gabriele Gerlach ◽  
Philipp Kraemer ◽  
Peggy Weist ◽  
Laura Eickelmann ◽  
Michael J. Kingsford
Keyword(s):  
Genetic Diversity ◽  
Coral Reef ◽  
Genetic Structure ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Population Genetic Study ◽  
Hard Coral ◽  
Great Loss ◽  
Metapopulation Structure ◽  
The Impact

AbstractCyclones have one of the greatest effects on the biodiversity of coral reefs and the associated species. But it is unknown how stochastic alterations in habitat structure influence metapopulation structure, connectivity and genetic diversity. From 1993 to 2018, the reefs of the Capricorn Bunker Reef group in the southern part of the Great Barrier Reef were impacted by three tropical cyclones including cyclone Hamish (2009, category 5). This resulted in substantial loss of live habitat-forming coral and coral reef fish communities. Within 6–8 years after cyclones had devastated, live hard corals recovered by 50–60%. We show the relationship between hard coral cover and the abundance of the neon damselfish (Pomacentrus coelestis), the first fish colonizing destroyed reefs. We present the first long-term (2008–2015 years corresponding to 16–24 generations of P. coelestis) population genetic study to understand the impact of cyclones on the meta-population structure, connectivity and genetic diversity of the neon damselfish. After the cyclone, we observed the largest change in the genetic structure at reef populations compared to other years. Simultaneously, allelic richness of genetic microsatellite markers dropped indicating a great loss of genetic diversity, which increased again in subsequent years. Over years, metapopulation dynamics were characterized by high connectivity among fish populations associated with the Capricorn Bunker reefs (2200 km2); however, despite high exchange, genetic patchiness was observed with annual strong genetic divergence between populations among reefs. Some broad similarities in the genetic structure in 2015 could be explained by dispersal from a source reef and the related expansion of local populations. This study has shown that alternating cyclone-driven changes and subsequent recovery phases of coral habitat can greatly influence patterns of reef fish connectivity. The frequency of disturbances determines abundance of fish and genetic diversity within species.

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