| the influence of various reef sounds on coral-fish larvae behaviour. | the swimming behaviour of coral-reef fish larvae from 20 species of 10 different families was tested under natural and artificial sound conditions. underwater sounds from reef habitats (barrier reef, fringing reef and mangrove) as well as a white noise were broadcasted in a choice chamber experiment. sixteen of the 20 species tested significantly reacted to at least one of the habitat playback conditions, and a range of responses was observed: fishes were (1) attracted by a single sound but repe ... | 2015 | 25786340 |
| productivity and sea surface temperature are correlated with the pelagic larval duration of damselfishes in the red sea. | we examined the variation of pelagic larval durations (plds) among three damselfishes, dascyllus aruanus, d. marginatus, and d. trimaculatus, which live under the influence of an environmental gradient in the red sea. plds were significantly correlated with latitude, sea surface temperature (sst), and primary production (chla; chlorophyll a concentrations). we find a consistent decrease in plds with increasing sst and primary production (chla) towards the southern red sea among all species. this ... | 2016 | 26654297 |
| spatial distribution of fifty ornamental fish species on coral reefs in the red sea and gulf of aden. | the spatial distribution of 50 ornamental fish species from shallow water habitats on coral reefs were investigated using visual census techniques, between latitudes 11-29°n in the red sea, in jordan, egypt, saudi arabia, and yemen, and in the adjacent gulf of aden in djibouti. one hundred eighteen transects (each 100×5 m) were examined in 29 sites (3-8 sites per country). a total of 522,523 fish individuals were counted during this survey, with mean abundance of 4428.2 ± 87.26 individual per 50 ... | 2014 | 24478577 |
| chemical spying in coral reef fish larvae at recruitment. | when fish larvae recruit back to a reef, chemical cues are often used to find suitable habitat or to find juvenile or adult conspecifics. we tested if the chemical information used by larvae was intentionally produced by juvenile and adult conspecifics already on the reef (communication process) or whether the cues used result from normal biochemical processes with no active involvement by conspecifics ("spying" behavior by larvae). conspecific chemical cues attracted the majority of larvae (fou ... | 2015 | 26318049 |
| resurrection of indian ocean humbug damselfish, dascyllus abudafur (forsskål) from synonymy with its pacific ocean sibling, dascyllus aruanus (l.). | previous phylogeographic studies of the humbug damselfish, a widespread indo-west pacific coral reef fish, have revealed a split of two main mitochondrial lineages distributed on either side of the indo-pacific barrier. this has been interpreted as the result of vicariance. it has been hypothesized that reproductive barriers might currently limit gene flow between humbug damselfish populations from the indian ocean and the pacific ocean. in this study, we review the published phylogeographic inf ... | 2014 | 25433563 |
| selective mortality of a coral reef damselfish: role of predator-competitor synergisms. | phenotypic variability within cohorts of juvenile organisms can serve as the basis for selective mortality. previous studies have demonstrated the important role that predators play in this process but not the impact of competitors on selective predation. we use a combination of lab and field studies to evaluate the effect of the presence of adult competitor damselfish (dascyllus aruanus and pomacentrus moluccensis; family pomacentridae) on the selective mortality of newly-arrived (settled) lemo ... | 2008 | 18305966 |
| spatial distribution and coexistence of monogenean gill parasites inhabiting two damselfishes from moorea island in french polynesia. | the ectoparasite fauna of two damselfishes, stegastes nigricans and dascyllus aruanus, from moorea island in french polynesia was investigated. gills of these damselfishes were infected with congeneric monopisthocotylea monogenea belonging to the genus haliotrema. stegastes nigricans were found to harbour a guild of three haliotrema species whereas only one species inhabited d. aruanus. microhabitat distribution, inter- and intraspecific competition and interspecific associations on the gill wer ... | 2000 | 11138022 |
| the cercaria of galactosomum bearupi pearson, 1973 (trematoda: heterophyidae) at heron and masthead islands, great barrier reef, australia. | magnacercous cercariae, all morphologically identical but with different coloured tails, were found naturally infecting the intertidal prosobranch gastropod clypeomorus batillariaeformis habe & kosuge (cerithiidae) at heron and masthead islands. several species of coral-dwelling fishes were exposed to magnacercous cercariae. active ingestion by the fish, followed by the complete development of the metacercaria in the optic lobes, occurred in pomacentrus molluccensis bleeker, but not in dascyllus ... | 2000 | 10803437 |
| effects of venom of the olive sea snake, aipysurus laevis, on the behaviour and ventilation of three species of prey fish. | venom from the olive sea snake, aipysurus laevis, was injected into three species of prey fish, chromis nitida, dascyllus aruanus and istiblennius meleagris. their behaviour and ventilatory patterns were observed for 48 hr. six progressive stages of envenomation, involving impairment of the locomotory and ventilatory systems, were identified. there were significant interspecific differences in time taken to reach various stages. in nature, the action of the venom not only would facilitate subdui ... | 1990 | 2089740 |
| parasite diversity/host age and size relationship in three coral-reef fishes from french polynesia. | the parasite communities of three coral-reef fish species (stegastes nigricans, dascyllus aruanus and cephalopholis argus) were on tiahura reef, french polynesia. the age and growth of each fish was analysed by otolith increment counts and a significant correlation between these variables was found. stegastes nigricans was parasitised by six adult parasite species, d. aruanus by two adult parasite species and c. argus by five adult parasite species. the most common parasite species were found in ... | 1998 | 9846606 |
| spatial patterns in abundance of a damselfish reflect availability of suitable habitat. | for species with metapopulation structures, variation in abundance among patches can arise from variation in the input rate of colonists. for reef fishes, variability in larval supply frequently is invoked as a major determinant of spatial patterns. we examined the extent to which spatial variation in the amount of suitable habitat predicted variation in the abundance of the damselfish dascyllus aruanus, an abundant planktivore that occupies live, branched coral throughout the indo-pacific. reef ... | 2000 | 28307947 |
| mating rendezvous in monogenean gill parasites of the humbug dascyllus aruanus (pisces: pomacentridae). | the gills of the humbug, dascyllus aruanus (pomacentridae), were infected by a monogenean genus haliotrema at a high prevalence (83%) but with a low mean intensity (5.6 worms/fish). all the gill arches of 365 fish, caught on the fringing reef of moorea island (french polynesia), were examined for parasites. each hemibranch was divided into 12 subequal sections. monogeneans showing microhabitat overlap were defined as couples. hosts with low intensity of infection (fewer than 5 monogeneans per gi ... | 1999 | 10647055 |
| comparative trophic morphology in eight species of damselfishes (pomacentridae). | damselfishes show significant biodiversity in the coral reefs. to better understand such diversity, an ecomorphological approach was investigated in the trophic morphology of eight species of pomacentridae (chromis acares, c. margaritifer, dascyllus aruanus, d. flavicaudus, pomacentrus pavo, plectroglyphidodon johnstonianus, pl. lacrymatus and stegastes nigricans) belonging to different trophic guilds (zooplankton, algal, coral polyp feeders and omnivores). geometric morphometrics were used to q ... | 2008 | 17935195 |
| isolation and characterization of 16 microsatellite loci in the humbug damselfish, dascyllus aruanus (family pomacentridae). | here we report on 16 microsatellite loci designed for the damselfish dascyllus aruanus. all loci were tested on 98 individuals and were polymorphic (seven to 35 alleles). expected heterozygosity ranged from 0.705 to 0.942. six loci showed hardy-weinberg disequilibrium due to the occurrence of null alleles. cross-species amplifications conducted within the genus dascyllus (d. carneus, d. strasburgi, d. trimaculatus) lead to polymorphic fragments in 32 out of 48 tests. these 16 loci will enable fu ... | 2009 | 21564718 |
| the effect of adult aggression on habitat selection by settlers of two coral-dwelling damselfishes. | coral-reef fishes experience a major challenge when facing settlement in a multi-threat environment, within which, using settlement cues, they need to select a suitable site. studies in laboratories and artificial setups have shown that the presence of conspecific adults often serves as a positive settlement cue, whose value is explained by the increased survival of juveniles in an already proven fit environment. however, settlement in already inhabited corals may expose the recruits to adult ag ... | 2009 | 19436725 |
| genetic relatedness in groups of the humbug damselfish dascyllus aruanus: small, similar-sized individuals may be close kin. | kin selection plays an important role in the evolution of social behaviour in terrestrial systems. the extent to which kin selection influences the evolution of social behaviour in marine systems is largely unexplored. generally, it is considered that kin selection is irrelevant in marine systems, because it is assumed that the dispersing larval phase of marine organisms will break up kin associations. here, we challenge this assumption and investigate the opportunity for kin selection in a cora ... | 2009 | 19845858 |
| a model comparison reveals dynamic social information drives the movements of humbug damselfish (dascyllus aruanus). | animals make use a range of social information to inform their movement decisions. one common movement rule, found across many different species, is that the probability that an individual moves to an area increases with the number of conspecifics there. however, in many cases, it remains unclear what social cues produce this and other similar movement rules. here, we investigate what cues are used by damselfish (dascyllus aruanus) when repeatedly crossing back and forth between two coral patche ... | 2014 | 24152812 |
| ability to home in small site-attached coral reef fishes. | the ability of two common, site-attached coral-reef fishes to return to their home corals after displacement was investigated in a series of field experiments at one tree island, southern great barrier reef. the humbug dascyllus aruanus was displaced up to 250 m, with 42% of individuals returning home, irrespective of body size, displacement, direction (up or across currents) and route complexity, while for the lemon damselfish pomacentrus moluccensis 35% of individuals returned overall, with 33 ... | 2016 | 27324974 |
| small-scale environmental variation influences whether coral-dwelling fish promote or impede coral growth. | mutualistic symbioses are ubiquitous in nature and facilitate high biodiversity and productivity of ecosystems by enhancing the efficiency of energy and nutrient use within ecological communities. for example, small groups of fish that inhabit coral colonies in reef ecosystems potentially enhance coral growth through defense from coral predators, aeration of coral tissue and nutrient provisioning. this study examines whether the prevalence and consequences of fish-coral interactions vary among s ... | 2014 | 25205029 |
| dascyllus spp.: new hosts for lymphocystis, and a list of recent hosts. | lymphocystis disease is reported for the first time from the white-tailed damselfish, dascyllus aruanus, and the black-tailed humbug, dascyllus melanurus. both species are commercially important exotic aquarium fish from the indo-australian pacific. lymphocystis is recorded again from the copper banded angelfish, chelmon rostratus. an updated host list for the disease is included. | 1977 | 916147 |
| specialization in habitat use by coral reef damselfishes and their susceptibility to habitat loss. | while it is generally assumed that specialist species are more vulnerable to disturbance compared with generalist counterparts, this has rarely been tested in coastal marine ecosystems, which are increasingly subject to a wide range of natural and anthropogenic disturbances. habitat specialists are expected to be more vulnerable to habitat loss because habitat availability exerts a greater limitation on population size, but it is also possible that specialist species may escape effects of distur ... | 2012 | 23139876 |