scholarly journals The alternative splicing landscape of a coral reef fish during a marine heatwave

2021 ◽  
Author(s):  
Stanley Kin Nok Chan ◽  
Sneha Suresh ◽  
Philip Munday ◽  
Tim Ravasi ◽  
Moises Bernal ◽  
...  
Keyword(s):  
Alternative Splicing ◽  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Molecular Mechanisms ◽  
Elevated Temperatures ◽  
Single Gene ◽  
Reef Fishes ◽  
Thermal Fluctuations ◽  
Mapk Signaling

Alternative splicing is a molecular mechanism that enables a single gene to encode multiple transcripts and proteins by post-transcriptional modification of pre-RNA molecules. Changes in the splicing scheme of genes can lead to modifications of the transcriptome and the proteome. This mechanism can enable organisms to respond to environmental fluctuations. In this study, we investigated patterns of alternative splicing in the liver of the coral reef fish Acanthochromis polyacanthus in response to the 2016 marine heatwave on the Great Barrier Reef. The differentially spliced (DS; n=40) genes during the onset of the heatwave (i.e. 29.49°C or +1°C from average) were related to essential cellular functions such as the MAPK signaling system, Ca(2+) binding and homeostasis. With the persistence of the heatwave for a period of one month (February to March), 21 DS genes were detected, suggesting that acute warming during the onset of the heatwave is more influential on alternative splicing than the continued exposure to elevated temperatures. After the heatwave, the water temperature cooled to ~24.96°C, and fish showed differential splicing of genes related to cyto-protection and post-damage recovery (n=26). Two-thirds of the DS genes detected across the heatwave were also differentially expressed, revealing that the two molecular mechanisms act together in A. polyacanthus to cope with the acute thermal change. This study exemplifies how splicing patterns of a coral reef fish can be modified by marine heatwaves. Alternative splicing could therefore be a potential mechanism to adjust cellular physiological states under thermal stress and aid coral reef fishes in their response to more frequent acute thermal fluctuations in upcoming decades.

scholarly journals DNA-based identification of predators of the corallivorous Crown-of-Thorns Starfish (Acanthaster cf. solaris) from fish faeces and gut contents

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Frederieke J. Kroon ◽  
Carine D. Lefèvre ◽  
Jason R. Doyle ◽  
Frances Patel ◽  
Grant Milton ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Fish Species ◽  
Coral Reef Fish ◽  
Coral Cover ◽  
Fish Predation ◽  
Reef Fishes ◽  
Positive Control ◽  
Gut Contents ◽  
Reef Fish Species

Abstract The corallivorous Crown-of-Thorns Starfish (CoTS, Acanthaster spp.) has been linked with the widespread loss of scleractinian coral cover on Indo-Pacific reefs during periodic population outbreaks. Here, we re-examine CoTS consumption by coral reef fish species by using new DNA technologies to detect Pacific Crown-of-Thorns Starfish (Acanthaster cf. solaris) in fish faecal and gut content samples. CoTS DNA was detected in samples from 18 different coral reef fish species collected on reefs at various stages of CoTS outbreaks in the Great Barrier Reef Marine Park, nine of which had not been previously reported to feed on CoTS. A comprehensive set of negative and positive control samples confirmed that our collection, processing and analysis procedures were robust, although food web transfer of CoTS DNA cannot be ruled out for some fish species. Our results, combined with the (i) presence of CoTS spines in some samples, (ii) reported predation on CoTS gametes, larvae and settled individuals, and (iii) known diet information for fish species examined, strongly indicate that direct fish predation on CoTS may well be more common than is currently appreciated. We provide recommendations for specific management approaches to enhance predation on CoTS by coral reef fishes, and to support the mitigation of CoTS outbreaks and reverse declines in hard coral cover.

Visual Biology of Hawaiian Coral Reef Fishes. II. Colors of Hawaiian Coral Reef Fish

Copeia ◽  
2003 ◽  
Vol 2003 (3) ◽  
pp. 455-466 ◽  
Author(s):  
N. J. Marshall ◽  
K. Jennings ◽  
W. N. McFarland ◽  
E. R. Loew ◽  
G. S. Losey
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Reef Fishes ◽  
Coral Reef Fishes

scholarly journals Isotopic discrimination in helminths infecting coral reef fishes depends on parasite group, habitat within host, and host stable isotope value

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Philip M. Riekenberg ◽  
Marine J. Briand ◽  
Thibaud Moléana ◽  
Pierre Sasal ◽  
Marcel T. J. van der Meer ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Coral Reef ◽  
Stable Isotope ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Trophic Ecology ◽  
Negative Relationship ◽  
Reef Fishes ◽  
Trophic Relationships ◽  
Host Parasite

AbstractStable isotopes of carbon and nitrogen characterize trophic relationships in predator–prey relationships, with clear differences between consumer and diet (discrimination factor Δ13C and Δ15N). However, parasite–host isotopic relationships remain unclear, with Δ13C and Δ15N remaining incompletely characterized, especially for helminths. In this study, we used stable isotopes to determine discrimination factors for 13 parasite–host pairings of helminths in coral reef fish. Differences in Δ15N values grouped according to parasite groups and habitat within the host with positive Δ15N values observed for trematodes and nematodes from the digestive tract and variable Δ15N values observed for cestodes and nematodes from the general cavity. Furthermore, Δ13C values showed more complex patterns with no effect of parasite group or habitat within host. A negative relationship was observed between Δ15N and host δ15N values among different host-parasite pairings as well as within 7 out of the 13 pairings, indicating that host metabolic processing affects host-parasite discrimination values. In contrast, no relationships were observed for Δ13C values. Our results indicate that parasite group, habitat within host, and host stable isotope value drive Δ15N of helminths in coral reef fish while their effect on Δ13C is more idiosyncratic. These results call for use of taxon- or species-specific and scaled framework for bulk stable isotopes in the trophic ecology of parasites.

scholarly journals First comprehensive list of the coral reef fishes of Tunku Abdul Rahman Park, Sabah, Malaysia (Borneo)

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1762 ◽  
Author(s):  
Ditch Townsend
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Diversity Index ◽  
Reef Fishes ◽  
Time Span ◽  
Fish Diversity ◽  
Marine Park ◽  
A Site ◽  
Scientific Survey

A 573 species-long checklist of the fishes in this 50 km2 tropical marine park was created predominantly by combining an unpublished scientific survey from 1992 with a hobbyist’s large photograph collection from between 2006 and 2009. Of the Indo-Pacific region’s coral reef-associated fish species, 15.2% are found here. Drawn from 83 families, the most speciose are Pomacentridae (71), Gobiidae (68) and Lab-ridae (55). A regression formula using the Coral reef Fish Diversity Index (CFDI) for species seen in 1992 suggests the park hosts 464 species, compared with the CFDI-based estimate of 495 based only on da-ta collected between 2006 and 2009, and 596 for the combined Index. With only 62% of the Index’s species seen both in the earlier and later lists, the utility of the CFDI is questionable at a site or over a time-span like this.

Patterns of species diversity in the gastrointestinal helminths of a coral reef fish, Epinephelus merra (Serranidae), from French Polynesia and the South Pacific Ocean

1997 ◽  
Vol 75 (11) ◽  
pp. 1818-1827 ◽  
Author(s):  
Mark C. Rigby ◽  
John C. Holmes ◽  
Thomas H. Cribb ◽  
Serge Morand
Keyword(s):  
Coral Reef ◽  
Species Diversity ◽  
Pacific Ocean ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
South Pacific ◽  
Reef Fishes ◽  
French Polynesia ◽  
Parasite Communities ◽  
South Pacific Ocean

Large-scale patterns of species diversity in the gastrointestinal helminth faunas of the coral reef fish Epinephelus merra (Serranidae) were investigated in French Polynesia and the South Pacific Ocean. The richer barrier reef community in French Polynesia supported richer parasite communities in E. merra than that on the fringing reef. While parasite communities among fish from the same archipelago were similar, differences in potential host species and the distance between archipelagos may have contributed to a qualitative difference in parasite communities between archipelagos. Digenean community diversity in coral reef fishes was greater in the western South Pacific, following similar patterns in free-living species. However, overall species diversity of camallanid nematodes of coral reef fishes does not appear to have been similarly affected.

scholarly journals Coral Reef Fishes Biodiversity In Pahawang Island,Pesawaran District Lampung

AQUASAINS ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 887
Author(s):  
Darma Yuliana ◽  
Ayu Rahmasari ◽  
Herman Yulianto ◽  
Abdullah Aman Damai
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Diversity Index ◽  
Similarity Index ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Line Transect ◽  
Marine Tourism ◽  
Reef Health

The components of coral reef ecosystem can be described by the unique regulation in community level. Coral reef fishes use coral reef as their habitat and they highly depend on coral reef health. Otherwise, the condition of coral reef health can be predicted by the biodiversity of coral reef fishes. The research aim was describe communities differences between two explored area in marine tourism spots in Pahawang Island. This research was conducted on November 2019 at two stations on the coral reefs ecosystem of Pahawang Island represented the two quitely different area, the marine tourism and the visitor areas.  The coral reef fishes were observed by using visual census method with a Line Transect length of 30 meters and a visibility of 2.5 meters left and right of the transect.  Coral reef fish community structure was measured by diversity, similarity, and dominancy indexes. A total of 1.940 coral reef fish species from 13 families were recorded. Pomacentridae is the most speciose family (1.091 species), followed by Siganidae (308 species) and Labridae (166 species). Biodiversity of coral reef fishes at Pahawang Island showed results diversity index (H') in both observation stations classified as medium with a low dominance index value (C) and similarity index (E)  at both stations classified as high, presumably as a result of tourism activities. The diversity index at station 2 has a greater value than station 1 as a tourist area with diving and snorkeling tourism activities, at station 2 there are more types or genus of reef fish, compared to station 1.

scholarly journals Coral reef fishes in the banks and rocky islands in the offshore waters of Binh Thuan province

2019 ◽  
Vol 19 (4A) ◽  
pp. 259-271
Author(s):  
Mai Xuan Dat
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Reef Fishes ◽  
Average Density ◽  
Coral Reef Fishes ◽  
South Central ◽  
Fish Group ◽  
Coast Of Vietnam

Binh Thuan province is located in the South Central Coast of Vietnam with favorable conditions for living coral reefs. The coral reefs were mainly investigated in coastal water areas and Phu Quy island, meanwhile other areas such as the banks and rocky islands seem to lack information. This study was conducted to evaluate the species composition and distribution of coral reef fish communities in the Royal Bishop banks and around rocky islands in Julia shoal in the offshore waters of Binh Thuan province in April 2019. A total of 151 species belonging to 86 genera and 33 families of coral reef fishes were recorded. Among them, 4 species for the first time recorded in Vietnam are Helcogramma striata (Hansen, 1986) (Tripterygiidae), Pseudanthias squamipinnis (Peters, 1855) (Serranidae), Bodianus bilunulatus (Lacepède, 1801) and Coris aygula (Lacepède, 1801) (Labridae). The total average density of coral reef fish in the offshore waters of Binh Thuan is quite high at 1,104.9 ± 617 individuals/250 m2, most of them are small sized fish and ornamental fish group, the large sized fish and target fish group accounts for a relatively low rate, but their density here is much higher compared to that in the coastal waters of Binh Thuan province. The comparative analysis also shows that sites in coral reef around rocky islands have species richness and density of coral reef fish higher than the bank area.

scholarly journals An integrative investigation of sensory organ development and orientation behavior throughout the larval phase of a coral reef fish

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
John E. Majoris ◽  
Matthew A. Foretich ◽  
Yinan Hu ◽  
Katie R. Nickles ◽  
Camilla L. Di Persia ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Fish Larvae ◽  
Reef Fishes ◽  
Orientation Behavior ◽  
Sensory Organs ◽  
Dispersal Patterns ◽  
Larval Phase

AbstractThe dispersal of marine larvae determines the level of connectivity among populations, influences population dynamics, and affects evolutionary processes. Patterns of dispersal are influenced by both ocean currents and larval behavior, yet the role of behavior remains poorly understood. Here we report the first integrated study of the ontogeny of multiple sensory systems and orientation behavior throughout the larval phase of a coral reef fish—the neon goby, Elacatinus lori. We document the developmental morphology of all major sensory organs (lateral line, visual, auditory, olfactory, gustatory) together with the development of larval swimming and orientation behaviors observed in a circular arena set adrift at sea. We show that all sensory organs are present at hatch and increase in size (or number) and complexity throughout the larval phase. Further, we demonstrate that most larvae can orient as early as 2 days post-hatch, and they swim faster and straighter as they develop. We conclude that sensory organs and swimming abilities are sufficiently developed to allow E. lori larvae to orient soon after hatch, suggesting that early orientation behavior may be common among coral reef fishes. Finally, we provide a framework for testing alternative hypotheses for the orientation strategies used by fish larvae, laying a foundation for a deeper understanding of the role of behavior in shaping dispersal patterns in the sea.

scholarly journals Individual back-calculated size-at-age based on otoliths from Pacific coral reef fish species

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Fabien Morat ◽  
Jérémy Wicquart ◽  
Nina M. D. Schiettekatte ◽  
Guillemette de Sinéty ◽  
Jean Bienvenu ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Fish Species ◽  
Coral Reef Fish ◽  
Growth Parameters ◽  
Reef Fishes ◽  
French Polynesia ◽  
Individual Growth ◽  
Reef Fish Species ◽  
Size At Age

Abstract Somatic growth is a critical biological trait for organismal, population, and ecosystem-level processes. Due to its direct link with energetic demands, growth also represents an important parameter to estimate energy and nutrient fluxes. For marine fishes, growth rate information is most frequently derived from sagittal otoliths, and most of the available data stems from studies on temperate species that are targeted by commercial fisheries. Although the analysis of otoliths is a powerful tool to estimate individual growth, the time-consuming nature of otolith processing is one barrier for collection of comprehensive datasets across multiple species. This is especially true for coral reef fishes, which are extremely diverse. Here, we provide back-calculated size-at-age estimates (including measures of uncertainty) based on sagittal otoliths from 710 individuals belonging to 45 coral reef fish species from French Polynesia. In addition, we provide Von Bertalanffy growth parameters which are useful to predict community level biomass production.

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