scholarly journals Shore fishes of the Marquesas Islands, an updated checklist with new records and new percentage of endemic species

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1758 ◽  
Author(s):  
Erwan Delrieu-Trottin ◽  
J. T. Williams ◽  
Philippe Bacchet ◽  
Michel Kulbicki ◽  
Johann Mourier ◽  
...  
Keyword(s):  
Coral Reef ◽  
Endemic Species ◽  
New Records ◽  
Fish Fauna ◽  
Reef Fishes ◽  
Easter Island ◽  
Species Level ◽  
Coastal Fish ◽  
Marquesas Islands ◽  
The Third

Expedition Pakaihi I Te Moana was conducted in 2011 to the Marquesas Islands, lying between 07°50ʹ S and 10°35ʹ S latitude and 138°25ʹ W and 140°50ʹ W longitude. The expedition combined extensive col-lections and visual censuses of the shore fish fauna. A total of 74 species are added as new records for the Marquesas Islands; the coastal fish fauna of the Marquesas Islands is increased from 415 to 495 species and the number of endemic species is increased from 48 to 68 species. This increases the per-centage of species-level endemism for the Marquesas Islands to 13.7%, ranking as the third highest region of endemism for coral reef fishes in the Indo-Pacific. Only two other peripheral regions, the Hawai’ian Islands and Easter Island, have higher values.

Understanding the origin of the most isolated endemic reef fish fauna of the Indo‐Pacific: Coral reef fishes of Rapa Nui

2019 ◽  
Vol 46 (4) ◽  
pp. 723-733 ◽  
Author(s):  
Erwan Delrieu‐Trottin ◽  
Laura Brosseau‐Acquaviva ◽  
Stefano Mona ◽  
Valentina Neglia ◽  
Emily C. Giles ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Fish Fauna ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Rapa Nui

scholarly journals Coping with Pleistocene climatic fluctuations: demographic responses in remote endemic reef fishes

2019 ◽  
Author(s):  
Erwan Delrieu-Trottin ◽  
Nicolas Hubert ◽  
Emily C. Giles ◽  
Pascaline Chifflet-Belle ◽  
Arnaud Suwalski ◽  
...  
Keyword(s):  
Reef Fish ◽  
Endemic Species ◽  
Demographic History ◽  
Fish Fauna ◽  
Reef Fishes ◽  
Milankovitch Cycles ◽  
Ecological Communities ◽  
Rapa Nui ◽  
Climatic Fluctuations ◽  
Demographic Responses

AbstractElucidating demographic history during the settlement of ecological communities is crucial for properly inferring the mechanisms that shape patterns of species diversity and their persistence through time. Here, we used genomic data and coalescent-based approaches to elucidate for the first time the demographic dynamics associated with the settlement by endemic reef fish fauna of one of the most remote peripheral islands of the Pacific Ocean, Rapa Nui (Easter Island). We compared the demographic history of nine endemic species in order to explore their demographic responses to Pleistocene climatic fluctuations. We found that Rapa Nui endemic species share a common demographic history as signatures of population expansions were retrieved for almost all of the species studied here, and synchronous demographic expansions initiated during the last glacial period were recovered for more than half of the studied species. These results suggest that eustatic fluctuations associated with Milankovitch cycles have played a central role in species demographic histories and in the final stage of the community assembly of many Rapa Nui reef fishes. Specifically, sea level low stands resulted in the maximum reef habitat extension for Rapa Nui endemic species; we discuss the potential role of seamounts in allowing endemic species to cope with Pleistocene climatic fluctuations, and we highlight the importance of local historical processes over regional ones. Overall, our results shed light on the mechanisms by which endemism arises and is maintained in peripheral reef fish fauna.

scholarly journals An updated checklist of the marine fish fauna of Redang Islands, Malaysia

2019 ◽  
Vol 7 ◽  
Author(s):  
Jianguo Du ◽  
Kar-Hoe Loh ◽  
Wenjia Hu ◽  
Xinqing Zheng ◽  
Yang Amri Affendi ◽  
...  
Keyword(s):  
Coral Reef ◽  
Marine Fish ◽  
Census Data ◽  
Diversity Index ◽  
Fish Fauna ◽  
Reef Fishes ◽  
Sandy Beaches ◽  
Peninsular Malaysia ◽  
Fish Diversity ◽  
Epinephelus Fuscoguttatus

Redang Islands Marine Park consists of nine islands in the state of Terengganu, Malaysia. Redang Island is one of the largest off the east coast of Peninsular Malaysia, which is famous for its crystal-clear waters and white sandy beaches. The ichthyofauna of the Redang archipelago was surveyed by underwater visual observations between August 2016 and May 2018. Census data were compiled with existing records into the checklist of the marine fish of the Redang archipelago presented herein. A total of 314 species belonging to 51 families were recorded. The most speciose families (Pomacentridae, Labridae, Scaridae, Serranidae, Apogonidae, Carangidae, Gobiidae, Chaetodontidae, Lutjanidae, Nemipteridae and Siganidae) were also amongst the most speciose at the neighbouring Tioman archipelago (except Chaetodontidae). The coral fish diversity index value for the six families of coral reef fishes (Chaetodontidae, Pomacanthidae, Pomacentridae, Labridae, Scaridae and Acanthuridae) of the study sites was 132. We estimated that there were 427 coral reef fish species in the Redang archipelago. According to the IUCN Red List, eight species are Near Threatened (Carcharhinus melanopterus, Chaetodon trifascialis, Choerodon schoenleinii, Epinephelus fuscoguttatus, E. polyphekadion, Plectropomus leopardus, Taeniura lymma and Triaenodon obesus), eleven are Vulnerable (Bolbometopon muricatum, Chaetodon trifasciatus, Chlorurus sordidus, Dascyllus trimaculatus, Epinephelus fuscoguttatus, E. polyphekadion, Halichoeres marginatus, Heniochus acuminatus, Nebrius ferrugineus, Neopomacentrus cyanomos and Plectropomus areolatus) and three are Endangered (Amphiprion clarkia, Cheilinus undulatus and Scarus ghobban) in the Redang archipelago. Five species are new records for Malaysia (Ctenogobiops mitodes, Epibulus brevis, Halichoeres erdmanni, H. richmondi and Scarus caudofasciatus) and 25 species are newly recorded in the Redang archipelago.

scholarly journals The importance of individual and species-level traits for trophic niches among herbivorous coral reef fishes

2017 ◽  
Vol 284 (1856) ◽  
pp. 20170307 ◽  
Author(s):  
Jacob E. Allgeier ◽  
Thomas C. Adam ◽  
Deron E. Burkepile
Keyword(s):  
Coral Reef ◽  
Species Coexistence ◽  
Alternative Hypothesis ◽  
Reef Fishes ◽  
Species Level ◽  
Species Variation ◽  
Biological Organization ◽  
Species Identity ◽  
Niche Complementarity ◽  
Individual Level

Resolving how species compete and coexist within ecological communities represents a long-standing challenge in ecology. Research efforts have focused on two predominant mechanisms of species coexistence: complementarity and redundancy. But findings also support an alternative hypothesis that within-species variation may be critical for coexistence. Our study focuses on nine closely related and ecologically similar coral reef fish species to test the importance of individual- versus species-level traits in determining the size of dietary, foraging substrate, and behavioural interaction niches. Specifically, we asked: (i) what level of biological organization best describes individual-level niches? and (ii) how are herbivore community niches partitioned among species, and are niche widths driven by species- or individual-level traits? Dietary and foraging substrate niche widths were best described by species identity, but no level of taxonomy explained behavioural interactions. All three niches were dominated by only a few species, contrasting expectations of niche complementarity. Species- and individual-level traits strongly drove foraging substrate and behavioural niches, respectively, whereas the dietary niche was described by both. Our findings underscored the importance of species-level traits for community-level niches, but highlight that individual-level trait variation within a select few species may be a key driver of the overall size of niches.

Reassessment of Tristan da Cunha Gelidium (Gelidiales, Rhodophyta) species

2020 ◽  
Vol 63 (5) ◽  
pp. 455-462
Author(s):  
D. Wilson Freshwater ◽  
Sue Scott ◽  
Enrico M. Tronchin ◽  
Gary W. Saunders
Keyword(s):  
Southern Africa ◽  
Endemic Species ◽  
Red Algae ◽  
Genetic Group ◽  
The Third ◽  
Tristan Da Cunha

AbstractThree endemic species of Gelidium have been described from the remote Tristan da Cunha archipelago. A recent barcode survey of Tristan da Cunha red algae in combination with the clarification of vouchers for previously sequenced specimens has prompted a molecular and morphological reassessment of these species. Analyses of rbcL and COI-5P data indicated that all sequenced Tristan da Cunha specimens represented a single taxon, and furthermore that this genetic group was conspecific with Gelidium micropterum from southern Africa. Morphologically the Tristan da Cunha specimens represented either Gelidium concinnum or Gelidium regulare, and there was a grade of character states between both of these species, as well as G. micropterum. Based on these results the synonymy of G. concinnum and G. regulare under G. micropterum is proposed and an expanded description of G. micropterum provided. None of the studied Tristan da Cunha specimens clearly fit the description of the third endemic species, Gelidium inflexum, and its status could not be determined.

Grazing pressure of herbivorous coral reef fishes on low coral-cover reefs

Coral Reefs ◽  
2006 ◽  
Vol 25 (3) ◽  
pp. 461-472 ◽  
Author(s):  
Michelle J. Paddack ◽  
Robert K. Cowen ◽  
Su Sponaugle
Keyword(s):  
Coral Reef ◽  
Coral Cover ◽  
Reef Fishes ◽  
Grazing Pressure ◽  
Coral Reef Fishes
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