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opencc-zeroOct 2022View details →

Illumina next generation ddRAD sequencing SNP data from: Contrasting genetic diversity and structure between endemic and widespread damselfishes are related to differing adaptive strategies

Aim: Discerning when, where, and how processes of isolation lead to differing biogeography is especially complex for marine species with similar ecological niches and within the same geographic location. We assessed population genetics of congeneric and ecologically similar damselfishes within their overlapping distributions and across potential barriers to geneflow. Taxon: Dascyllus marginatus (endemic) and Dascyllus abudafur (widespread). Location: Coral reefs from the Red Sea, Djibouti, Yemen, Oman, and Madagascar. Methods: We used RADseq derived SNPs to investigate key differences in population genetics between both species and discuss barriers shaping genetic differentiation (neutral vs. selective) and biogeography. Results: Dascyllus marginatus inhabited the Red Sea, the coasts of Yemen (including Socotra), and the Gulf of Oman. Dascyllus abudafur species was present from the Red Sea to Madagascar but was absent from Yemen and Oman. Populations of D. marginatus had an order of magnitude higher genetic differentiation compared to D. abudafur, as well as several outlier loci (suggesting selective pressure), which were absent in D. abudafur despite equal sampling locations. In both species, specimens from the Red Sea and Djibouti formed one genetic cluster separated from all other locations. Main conclusions: The stronger genetic structure at smaller geographic scale of the endemic species seems associated to faster adaptation to environmental differences; whereas the widespread species only experienced reduced geneflow and neutral differentiation at much larger geographic scales. Restrictive transitions (between the Gulf of Aqaba and the Red Sea or the Red Sea and the Gulf of Aden) did not affect the genetic architecture of either species, while the environmental shift within the Red Sea (at 22°N/20°N) affected the endemic but not the widespread species. Samples from continental Yemen revealed that a genetic break in the Gulf of Aden likely reflects historical colonization processes and not contemporary environmental regimes.

publicOct 2022View details →

Illumina next generation ddRAD sequencing SNP data from: Contrasting genetic diversity and structure between endemic and widespread damselfishes are related to differing adaptive strategies

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publicJun 2022View details →

A new theoretical performance landscape for suction feeding reveals adaptive kinematics in a natural population of reef damselfish

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publicOct 2022View details →

Positive interactions between corals and damselfish increase coral resistance to temperature stress

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FIGURE 5 in Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin's Island, Bangladesh

FIGURE 5. Maximum-likelihood tree constructed for COI gene sequences of Pomacentrus bangladeshius and its genetically closely related congeneric species retrieved from GenBank. Values of bootstrap support of>80% are shown above branches. The sequence of Pomacentrus auriventris Allen, 1991 marked by an asterisk (*) was obtained from the aquarium trade and therefore lacks locality information (Frédérich et al., 2013). Scale bar indicates number of nucleotide substitutions per site.

FIGURE 2 in Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin's Island, Bangladesh

FIGURE 2. Holotype of Pomacentrus bangladeshius n. sp., F1710SM–11, 77 mm SL; freshly caught specimen; Saint Martin's Island, Bangladesh (K.A. Habib).

FIGURE 1 in Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin's Island, Bangladesh

FIGURE 1. Map of the Saint Martin's Island and its location in Bangladesh and the Bay of Bengal (District: Cox's Bazar; Subdistrict/Upazilla: Teknaf; 20°34'–20° 38' N and 92°18'–92°21' E).

FIGURE 3. A. Paratype 1 in Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin's Island, Bangladesh

FIGURE 3. A. Paratype 1 (preserved) of P. bangladeshius n. sp., F1801SM–06, 71 mm SL; B. Paratype 2 (preserved) of P. bangladeshius n. sp. F1802SM–14, 67 mm SL, Saint Martin's Island, Bangladesh (K.A. Habib).

FIGURE 4. Pomacentrus bangladeshius n in Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin's Island, Bangladesh

FIGURE 4. Pomacentrus bangladeshius n. sp., paratype, F1802SM–14, distinct serrations on suborbital and preopercle; preorbital and suborbital naked.

opencc-zeroDec 2013View details →

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Data from: Aerobic scope predicts dominance during early life in a tropical damselfish

A range of physiological traits are linked with aggression and dominance within social hierarchies, but the role of individual aerobic capacity in facilitating aggression has seldom been studied. Further, links previously observed between an individual's metabolic rate and aggression level may be context dependent and modulated by factors such as social stress and competitor familiarity. We examined these issues in juvenile Ambon damselfish, Pomacentrus amboinensis, which display intraspecific competition for territories during settlement on coral reefs. Individuals were measured for routine metabolic rate, aerobic scope, and anaerobic capacity using intermittent-flow respirometry before dyadic dominance contests. Post-contest, fish were measured for metabolic rate in isolation and while interacting with their previous competitor or a stranger in adjacent transparent respirometers. In arena contests, aerobic scope was correlated with aggression and dominance, while routine metabolic rate and anaerobic capacity were not related to dominance. Post-contest, subordinates showed a rise in metabolic rate and decrease in available aerobic scope, presumably due to social stress. Dominants increased metabolic rate in the presence of a previous competitor, possibly due to the stresses of hierarchy maintenance. Metabolic rate during aggressive interactions did not approach that measured during exhaustive exercise, suggesting individuals do not fully utilise their aerobic scope during aggression. A greater aerobic scope may, however, allow faster post-contest recovery. These results demonstrate a link between aerobic scope and dominance during intraspecific competition for territory. Selection on aerobic scope could therefore follow, either indirectly through correlations with other traits influencing resource-holding potential, or directly if aerobic scope carries benefits important for territory acquisition or holding, such as an enhanced capacity to cope with socially-induced stress.

opencc-by-nc-nd-4.0Jul 2016View details →

An Indo-Pacific damselfish on an oil-platform in the southwest Gulf of Mexico

The damselfish Neopomacentrus cyanomos is a common fish on coral reefs throughout the Indo-west Pacific. This species, which is not native to the Atlantic, was first observed in the southwest Gulf of Mexico in 2013. Subsequent investigations show that it is widely distributed in that area. Current evidence supports the hypothesis that this species having been transported to the Gulf of Mexico by an offshore oil platform being relocated there from the Indo-Pacific. On inshore reefs in the Gulf of Mexico it is not particularly abundant. However, it is more common at Cayo Arcas, an offshore reef in the southwest corner of Campeche Bank, and superabundant on an oil-platform adjacent to that reef.  This video documents the dense aggregation of 50-100,000 individuals of this species living on the heavily encrusted legs of that oil platform down to at least 45 m depths in early 2016. Published on Zenodo July 21, 2016.  Zenodo. doi: <a href="http://dx.doi.org/10.5281/zenodo.58455">10.5281/zenodo.58455</a> Also viewable on Youtube: https://youtu.be/mxo4bSKKQI0

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Data from: Yellowtail damselfish Chrysiptera parasema can associate predation risk with the acoustic call of a heterospecific damselfish following pairing with conspecific alarm cues

The ability to detect and respond to the presence of predation risk is under intense selection, especially for small-bodied fishes that coexist with predators. Fish use visual, olfactory, and auditory cues to assess predation risk. Damselfishes (Pomacentridae) use auditory vocalizations during inter- and intrasexual interactions, but it is not known if they can use vocalizations in the context of predator-prey interactions. Here, we test if yellowtail damselfish, Chrysiptera parasema, can learn to associate the territorial vocalization of heterospecific humbug damselfish Dascyllus aruanus with predation risk. In conditioning trials of yellowtail damselfish we played the territorial call of humbug damselfish while introducing either blank water (control treatment) or chemical alarm cue derived from damaged skin of conspecific yellowtail damselfish. In conditioning trials, fish exposed to alarm cue increased activity and spent more time in the water column relative to fish that received the control treatment. After a single conditioning trial, conditioned fish were exposed again to the territorial call. Fish conditioned with the call + alarm cue increased activity and time in the water column relative to fish that had been conditioned with the control treatment. These data indicate associative learning of an auditory stimulus with predation risk in a species that regularly uses auditory signaling in other contexts. Recordings of conditioning and test trials failed to detect any acoustic calls produced by test fish in response to the perception of predation risk. Thus, although yellowtail damselfish can associate risk with auditory stimuli, we found no evidence that they produce an alarm call.

opencc-zeroApr 2024View details →

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Data from: Travel with your kin ship! Insights from genetic sibship among settlers of a coral damselfish

Coral reef fish larvae are tiny, exceedingly numerous, and hard to track. They are also highly capable, equipped with swimming and sensory abilities that may influence their dispersal trajectories. Despite the importance of larval input to the dynamics of a population, we remain reliant on indirect insights to the processes influencing larval behavior and transport. Here, we used genetic data (300 independent single nucleotide polymorphisms) derived from a light trap sample of a single recruitment event of Dascyllus abudafur in the Red Sea (N = 168 settlers). We analyzed the genetic composition of the larvae and assessed whether kinship among these was significantly different from random as evidence for cohesive dispersal during the larval phase. We used Monte Carlo simulations of similar‐sized recruitment cohorts to compare the expected kinship composition relative to our empirical data. The high number of siblings within the empirical cohort strongly suggests cohesive dispersal among larvae. This work highlights the utility of kinship analysis as a means of inferring dynamics during the pelagic larval phase.

opencc-zeroDec 2021View details →

FIGURE 4 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 4. Chromis tingting sp. nov., KPM-NI 18916, 98.5 mm SL, paratype, off Hatsu-shima Island, west side of Sagami Bay, Shizuoka Prefecture, Japan. Photo by H. Senou.

FIGURE 3 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 3. Chromis tingting sp. nov., KPM-NI 30479, 53.6 mm SL, holotype, diagram of head. AN, anterior nostril; CSO, crescent opening of supraorbital canal; PN, posterior nostril. Arrow indicates posterior extent of free margin of suborbital. Exposed scales shown in grey.

FIGURE 7 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 7. Juveniles and adults of selected Chromis species: A1: Chromis tingting sp. nov., juvenile, Hachijo-Jima, Japan (Photo by Kiss2Sea); A2: Chromis tingting sp. nov., adult, Izu Oceanic Park, Japan (Photo by W. Takase); B1: Chromis mirationis, juvenile, aquarium specimen from Okinawa (Photo by Y.K. Tea); B2: Chromis mirationis, adult, aquarium specimen from Izu peninsular (Photo by Y.K. Tea); C1: Chromis okamurai, juvenile, Kashiwajima, Japan (Photo by K. Nakajima); C2: Chromis okamurai, adult, Kashiwajima, Japan (Photo by K. Nakajima); D1: Chromis struhsakeri, juvenile, Midway Atoll (Photo by R. Whitton); D2: Chromis struhsakeri, adult, Midway Atoll (Photo by R. Whitton).

FIGURE 6 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 6. Chromis tingting sp. nov., juvenile specimen from Kashiwajima, Japan. Note the large black spot on the pectoral fin axil. Photo by K. Nakajima.

FIGURE 2 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 2. Chromis tingting sp. nov., KPM-NI 30479, 53.6 mm SL, holotype, Izu Peninsula, Sagami Bay, Shizuoka Prefecture, Japan. Photo by H. Senou.

FIGURE 8 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 8. Distribution records for selected species of Chromis: square, C. tingting sp. nov.; circles, C. tingting sp. nov. + C. mirationis + C. okamurai; triangles, C. mirationis; stars, C. struhsakeri.

FIGURE 1. Chromis mirationis, ZUMT 3627, 74.3 in Chromis tingting, a new species of damselfish from mesophotic coral ecosystems of southern Japan, with notes on C. mirationis Tanaka (Teleostei: Pomacentridae)

FIGURE 1. Chromis mirationis, ZUMT 3627, 74.3 mm SL, holotype. A: left lateral view; B: right pectoral axil; C: lower part of head showing posterior extent of free suborbital margin (indicated by arrow). Photos by H. Senou.