scholarly journals Intrageneric differences in the effects of acute temperature exposure on competitive behaviour of damselfishes

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7320
Author(s):  
Donald T. Warren ◽  
Mark I. McCormick
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Aggressive Behaviour ◽  
Community Dynamics ◽  
Reef Fishes ◽  
Thermal Fluctuations ◽  
Sympatric Species ◽  
Competitive Interactions ◽  
Effect Of Temperature ◽  
Change Models

Projected increases in global temperatures brought on by climate change threaten to disrupt many biological and ecological processes. Tropical ectotherms, like many fishes, can be particularly susceptible to temperature change as they occupy environments with narrow thermal fluctuations. While climate change models predict temperatures to increase over decades, thermal fluctuations are already experienced on a seasonal scale, which may affect the ability to capture and defend resources across a thermal gradient. For coral reef fish, losers of competitive interactions are often more vulnerable to predation, and this pressure is strongest just after settlement. Competitive interactions may determine future success for coral reef fishes, and understanding how temperature experienced during settlement can influence such interactions will give insight to community dynamics in a future warmer world. We tested the effect of increased temperatures on intraspecific competitive interactions of two sympatric species of reef damselfish, the blue damselfish Pomacentrus nagasakiensis, and the whitetail damselfish Pomacentrus chrysurus. Juvenile fishes were exposed to one of four temperature treatments, ranging from 26–32 °C, for seven days then placed into competitive arenas where aggressive interactions were recorded between sized matched individuals within each species. While there was no apparent effect of temperature treatment on aggressive behaviour for P. chrysurus, we observed up to a four-fold increase in aggression scores for P. nagasakiensis with increasing temperature. Results suggest that temperature experienced as juveniles can impact aggressive behaviour; however, species-specific thermal tolerances led to behavioural affects that differ among closely related species. Differential thermal tolerance among species may cause restructuring of the interaction network that underlies the structure of reef assemblages.

scholarly journals Extended exposure to elevated temperature affects escape response behaviour in coral reef fishes

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3652 ◽  
Author(s):  
Donald T. Warren ◽  
Jennifer M. Donelson ◽  
Mark I. McCormick
Keyword(s):  
Elevated Temperature ◽  
Escape Response ◽  
Community Dynamics ◽  
Thermal Exposure ◽  
Reef Fishes ◽  
Effect Of Temperature ◽  
Short Term ◽  
Physical Ability ◽  
Pomacentrus Amboinensis ◽  
Extended Exposure

The threat of predation, and the prey’s response, are important drivers of community dynamics. Yet environmental temperature can have a significant effect on predation avoidance techniques such as fast-start performance observed in marine fishes. While it is known that temperature increases can influence performance and behaviour in the short-term, little is known about how species respond to extended exposure during development. We produced a startle response in two species of damselfish, the lemon damselPomacentrus moluccensis,and the Ambon damselfishPomacentrus amboinensis,by the repeated use of a drop stimulus. We show that the length of thermal exposure of juveniles to elevated temperature significantly affects this escape responses.Short-term (4d) exposure to warmer temperature affected directionality and responsiveness for both species. After long-term (90d) exposure, onlyP. moluccensisshowed beneficial plasticity, with directionality returning to control levels. Responsiveness also decreased in both species, possibly to compensate for higher temperatures. There was no effect of temperature or length of exposure on latency to react, maximum swimming speed, or escape distance suggesting that the physical ability to escape was maintained. Evidence suggests that elevated temperature may impact some fish species through its effect on the behavioural responses while under threat rather than having a direct influence on their physical ability to perform an effective escape response.

scholarly journals Trophic niche segregation allows range‐extending coral reef fishes to co‐exist with temperate species under climate change

2019 ◽  
Vol 26 (2) ◽  
pp. 721-733 ◽  
Author(s):  
Kelsey M. Kingsbury ◽  
Bronwyn M. Gillanders ◽  
David J. Booth ◽  
Ivan Nagelkerken
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Reef Fishes ◽  
Trophic Niche ◽  
Coral Reef Fishes ◽  
Temperate Species ◽  
Niche Segregation

scholarly journals Dietary generalism accelerates arrival and persistence of coral‐reef fishes in their novel ranges under climate change

2020 ◽  
Vol 26 (10) ◽  
pp. 5564-5573 ◽  
Author(s):  
Cristián J. Monaco ◽  
Corey J. A. Bradshaw ◽  
David J. Booth ◽  
Bronwyn M. Gillanders ◽  
David S. Schoeman ◽  
...  
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Reef Fishes ◽  
Coral Reef Fishes

Climate change and the future for coral reef fishes

2008 ◽  
Vol 9 (3) ◽  
pp. 261-285 ◽  
Author(s):  
Philip L Munday ◽  
Geoffrey P Jones ◽  
Morgan S Pratchett ◽  
Ashley J Williams
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
The Future

scholarly journals Crucial knowledge gaps in current understanding of climate change impacts on coral reef fishes

2010 ◽  
Vol 213 (6) ◽  
pp. 894-900 ◽  
Author(s):  
S. K. Wilson ◽  
M. Adjeroud ◽  
D. R. Bellwood ◽  
M. L. Berumen ◽  
D. Booth ◽  
...  
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Climate Change Impacts ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Current Understanding ◽  
Knowledge Gaps

scholarly journals Comparative transcriptomics of sympatric species of coral reef fishes (genus: Haemulon)

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6541 ◽  
Author(s):  
Moisés A. Bernal ◽  
Groves B. Dixon ◽  
Mikhail V. Matz ◽  
Luiz A. Rocha
Keyword(s):  
Gene Expression ◽  
Immune Response ◽  
Coral Reef ◽  
Positive Selection ◽  
Reef Fishes ◽  
Sympatric Species ◽  
Coral Reef Fishes ◽  
Western Atlantic ◽  
Morphological Studies ◽  
Fish Samples

Background Coral reefs are major hotspots of diversity for marine fishes, yet there is still ongoing debate on the mechanisms that promote divergence in these rich ecosystems. Our understanding of how diversity originates in this environment could be enhanced by investigating the evolutionary dynamics of closely related fishes with overlapping ranges. Here, we focus on grunts of the genus Haemulon, a group of coral reef fishes with 15 species in the Western Atlantic, 11 of which are syntopic. Methods Wild fish samples from three sympatric species of the Caribbean: Haemulon flavolineatum, H. carbonarium and H. macrostomum, were collected while SCUBA diving. RNA was extracted from livers, and the transcriptomes were assembled and annotated to investigate positive selection (Pairwise dN/dS) and patterns of gene expression between the three species. Results Pairwise dN/dS analyses showed evidence of positive selection for genes associated with immune response, cranial morphology and formation of the anterior–posterior axis. Analyses of gene expression revealed that despite their sympatric distribution, H. macrostomum showed upregulation of oxidation-reduction machinery, while there was evidence for activation of immune response in H. carbonarium. Discussion Overall, our analyses suggest closely related grunts show important differences in genes associated with body shape and feeding morphology, a result in-line with previous morphological studies in the group. Further, despite their overlapping distribution they interact with their environment in distinct fashions. This is the largest compendium of genomic information for grunts thus far, representing a valuable resource for future studies in this unique group of coral reef fishes.

scholarly journals Climate-driven coral reorganisation influences aggressive behaviour in juvenile coral-reef fishes

Coral Reefs ◽  
2016 ◽  
Vol 35 (2) ◽  
pp. 473-483 ◽  
Author(s):  
Judith E. Kok ◽  
Nicholas A. J. Graham ◽  
Mia O. Hoogenboom
Keyword(s):  
Coral Reef ◽  
Aggressive Behaviour ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Juvenile Coral

scholarly journals Angels in disguise: sympatric hybridization in the marine angelfishes is widespread and occurs between deeply divergent lineages

2020 ◽  
Vol 287 (1932) ◽  
pp. 20201459
Author(s):  
Yi-Kai Tea ◽  
Jean-Paul A. Hobbs ◽  
Federico Vitelli ◽  
Joseph D. DiBattista ◽  
Simon Y. W. Ho ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fishes ◽  
Sympatric Species ◽  
Coral Reef Fishes ◽  
General Phenomenon ◽  
Closely Related Species ◽  
Upper Limits ◽  
The Family ◽  
Comprehensive Survey ◽  
Physical Barriers

Hybridization events are not uncommon in marine environments where physical barriers are attenuated. Studies of coral reef taxa have suggested that hybridization predominantly occurs between parapatric species distributed along biogeographic suture zones. By contrast, little is known about the extent of sympatric hybridization on coral reefs, despite the large amount of biogeographic overlap shared by many coral reef species. Here, we investigate if the propensity for hybridization along suture zones represents a general phenomenon among coral reef fishes, by focusing on the marine angelfishes (family Pomacanthidae). Although hybridization has been reported for this family, it has not been thoroughly surveyed, with more recent hybridization studies focusing instead on closely related species from a population genetics perspective. We provide a comprehensive survey of hybridization among the Pomacanthidae, characterize the upper limits of genetic divergences between hybridizing species and investigate the occurrence of sympatric hybridization within this group. We report the occurrence of hybridization involving 42 species (48% of the family) from all but one genus of the Pomacanthidae. Our results indicate that the marine angelfishes are among the groups of coral reef fishes with the highest incidences of hybridization, not only between sympatric species, but also between deeply divergent lineages.

Sign in / Sign up

Export Citation Format

Share Document