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FIGURE 6 in Taxonomy of freshwater gobies of the genus Rhinogobius (Oxudercidae, Gobiiformes) from central Vietnam, with descriptions of two new species

FIGURE 6. Preserved specimens of Rhinogobius rong (a, b), R. nami (c, d), R. taenigena (e, f), R. leavelli (g, h), and R. similis (i, j) collected from Da Nang City and Thua Thien Hue Province, Vietnam. Specimens on left side are males, right are females. a, NSMT-P 147886, holotype, 45.6 mm SL; b, OISTICH 254, paratype, 52.7 mm SL; c, NSMT-P 147890, holotype, 24.9 mm SL; d, OISTICH 290, paratype, 27.0 mm SL; e, OISTICH 299, 23.6 mm SL; f, OISTICH 305, 34.1mm SL; g, NSMT-P 147888, 43.8 mm SL; h, NSMT-P 147887, 41.1 mm SL; i, OISTICH 240, 56.3 mm SL; j, OISTICH 241, 45.2 mm SL.

FIGURE 4. Rhinogobius rong immediately after fixation. a in Taxonomy of freshwater gobies of the genus Rhinogobius (Oxudercidae, Gobiiformes) from central Vietnam, with descriptions of two new species

FIGURE 4. Rhinogobius rong immediately after fixation. a, NSMT-P 147886, holotype, male, 45.6 mm SL; b, OISTICH 255, paratype, female, 46.1 mm SL.

FIGURE 3 in Taxonomy of freshwater gobies of the genus Rhinogobius (Oxudercidae, Gobiiformes) from central Vietnam, with descriptions of two new species

FIGURE 3. Arrangement of cephalic sensory pores and cutaneous sensory papillae in Rhinogobius rong (a–c, NSMT-P 147886) and Rhinogobius nami (d–f, NSMT-P 147890). a, d, lateral view; b, e, dorsal view; c, f, ventral view. AN, anterior naris; PN, posterior naris.

FIGURE 2 in Taxonomy of freshwater gobies of the genus Rhinogobius (Oxudercidae, Gobiiformes) from central Vietnam, with descriptions of two new species

FIGURE 2. Proportions of head length, upper-jaw length, first dorsal-, second dorsal-, anal-, and caudal-fin lengths to standard length (SL) of Rhinogobius rong (red circles), R. nami (light-blue circles), R. taenigena (deep-blue diamonds), R. leavelli (orange triangles), and R. similis (green squares) collected from Da Nang City and Thua Thien Hue Province. Solid symbols represent males, open symbols represent females, and symbols filled with grey represent specimens of unknown sex (for R. similis). Symbols with an asterisk are holotypes.

opencc-by-4.0Aug 2024View details →

The effect of temperature on round goby embryo development

The dataset describes the laboratory studies of temperature effect on round goby embryo development. Incubation was carried out at the following water temperatures: 5°C, 10°C, 12°C, 15°C, 16°C, 20°C, 25°C. The stages of embryo development were noted. The yolk sac was measured (two axes) from the images to determine its volume.

FIGURE 9 in Taxonomy of freshwater gobies of the genus Rhinogobius (Oxudercidae, Gobiiformes) from central Vietnam, with descriptions of two new species

FIGURE 9. Comparative material of the genus Rhinogobius from northern Vietnam (a–l) and Japan (m–p) observed in the present study. Photographs were taken immediately after fixation. Specimens on left side are males, right are females. a, b, R. sulcatus (a, OISTICH 184, 30.4 mm SL; b, OISTICH 190, 32.4 mm SL); c, d, R. boa (c, OISTICH 161, 25.4 mm SL; d, OISTICH 160, 28.0 mm SL); e, f, R. virgigena (e, NSMT-P 147872, 36.1 mm SL; f, OISTICH 154, 33.7 mm SL); g, h, R. variolatus (g, OISTICH 169, 31.4 mm SL; h, OISTICH 170, 28.8 mm SL); i, j, R. leavelli (i, OISTICH 209, 38.1 mm SL; j, OISTICH 210, 35.4 mm SL); k, l, R. similis (k, OISTICH 222, 54.4 mm SL; l, NSMT-P 147882, 44.7 mm SL); m, n, R. similis from Okinawa Island (m, URM-P 49149, 48.6 mm SL; n, OISTICH 2, 63.6 mm SL); o, p, R. similis, from Izu Peninsula (o, OISTICH 330, 47.6 mm SL; p, OISTICH 332, 51.0 mm SL).

opencc-zeroDec 2016View details →

Data from: A new mesophotic goby, Palatogobius incendius (Teleostei: Gobiidae), and the first record of invasive lionfish preying on undescribed biodiversity

A new species of deep-reef fish in the goby genus Palatogobius is described from recent submersible collections off Curaçao and Dominica. Video footage of schools of this species reveal predation by the invasive Indo-Pacific lionfish (Pterois spp.), the first record of undescribed fauna potentially being eaten by lionfish outside of its native range. We present molecular phylogenetic data for all valid species of Palatogobius and related genera, as well as a taxonomic key to the species of Palatogobius and a generic key to Palatogobius and related genera in the western Atlantic. Lastly, we discuss ecological and behavioral aspects of some deep-reef fishes in light of potential threats from invasive lionfish.

opencc-zeroDec 2016View details →

Data from: A dynamical model for invasive round goby populations reveals efficient and effective management options

1. When prevention of invasive species' introductions fails, society faces the challenge to manage these invasive species in an effective and efficient way. The success of this depends on biological aspects and on cooperation between decision makers and scientists. Using the case of the round goby Neogobius melanostomus, one of Europe's worst invasive species, we propose an approach guiding scientists to co-produce effective and efficient population control measures in collaboration with decision makers. 2. We surveyed the effectiveness, urgency and simplicity perceived by decision makers as well as the support of two population control options: removal of eggs and/or adults. Using a field study and a dynamical population model, we investigated the effectiveness and efficiency for both options in different population contexts. 3. Decision makers initially seemed to lack a clear preference for either control option. After being presented with preliminary field and modelling results, decision makers mostly approved measures being developed to implement the two control options. 4. Starting population control early after detecting the species requires in total fewer years for eradication than controlling an established population: to reach an eradication success rate of 95%, 13 years for early start vs. 18 years for late start are needed when removing eggs and adults; when removing adults only, 20 vs. 29 years are needed. Removing eggs and adults combined results in a yearly effort of 5.01 h m-2, while removing adults only results in a yearly effort of 1.76 h m-2. Thus, removing adults only proved to be the most efficient option to eradicate the population. Nonetheless, considerable effort is needed: when removing less than 57% of the adult population, eradication is not feasible, even assuming low survival and fecundity rates for the population. Further, inflow of new propagules renders eradication efforts ineffective. 5. Synthesis and applications. Scientists who aim to support decision makers in finding an optimal control strategy for invasive species need to be able to provide scientific knowledge on effectiveness and efficiency of different options. For round goby and most non-native species, eradication is only feasible if started early in recently arrived populations and if inflow of new propagules can be prevented.

opencc-zeroDec 2020View details →

Data from: Black goby territorial males adjust their ejaculate's characteristics in response to the presence of sneakers

In many species males can rapidly adjust their ejaculate performance in response to changing levels of sperm competition, an ability that is probably mediated by seminal fluid adaptive plasticity. In the black goby, Gobius niger, female spawning in the nest of a territorial male can last hours, and males attach a viscous ejaculate to the nest roof, from which sperm are slowly released. During spawning, sneaker males attempt to approach the nest and release their sperm, and territorial males intensify their defensive effort at the increasing of sneaking pressure. We show here that territorial males adjust the characteristics of their seminal fluid in response to the number of competitor sneakers. Territorial males produce an ejaculate from which sperm are released at a rate that decreases as the number of surrounding competitor sneakers increases. Field observations showed that multiple sneaking attempts occurred sequentially, forcing territorials to frequently leave the nest. Overall these results suggest that the adjustment of seminal fluid viscosity may guarantee a continuous release of sperm from the ejaculate, although at a lower rate, when the territorial male is engaged in prolonged nest defense possibly minimizing the postcopulatory cost of an increased precopulatory mate guarding.

opencc-zeroJul 2021View details →

Isotope analysis combined with DNA barcoding provide new insights into the dietary niche of khulan in the Mongolian Gobi

With increasing livestock numbers, competition and avoidance are increasingly shaping resource availability for wild ungulates. Shifts in the dietary niche of wild ungulates are likely and can be expected to negatively affect their fitness. The Mongolian Gobi constitutes the largest remaining refuge for several threatened ungulates, but unprecedentedly high livestock numbers are sparking growing concerns over rangeland health and impacts on threatened ungulates like the Asiatic wild ass (khulan). Previous stable isotope analysis of khulan tail hair from the Dzungarian Gobi suggested that they graze in summer but switch to a poorer mixed C3 grass / C4 shrub diet in winter, most likely in reaction to local herders and their livestock. Here we attempt to validate these findings with a different methodology, DNA metabarcoding. Further, we extend the scope of the original study to the South Gobi Region, where we expect higher proportions of low-quality browse in the khulan winter diet due to a higher human and livestock presence. Barcoding confirmed the assumptions behind the seasonal diet change observed in the Dzungarian Gobi isotope data, and new isotope analysis revealed a strong seasonal pattern and higher C4 plant intake in the South Gobi Region, in line with our expectations. However, DNA barcoding revealed C4 domination of winter diet was due to C4 grasses (rather than shrubs) for the South Gobi Region. Slight climatic differences result in regional shifts in the occurrence of C3 and C4 grasses and shrubs, which do not allow for an isotopic separation along the grazer-browser continuum over the entire Gobi. Our findings do not allow us to confirm human impacts upon dietary preferences in khulan as we lack seasonal samples from the South Gobi Region. However, these data provide novel insight into khulan diet, raise new questions about plant availability versus preference, and provide a cautionary tale about indirect analysis methods if used in isolation or extrapolated to the landscape level. Good concordance between relative read abundance of C4 genera from barcoding and proportion of C4 plants from isotope analysis adds to a growing body of evidence that barcoding is a promising quantitative tool to understand resource partitioning in ungulates.

FIGURE 8 in Eviota atriventris, a New Goby Previously Misidentified as Eviota pellucida Larson (Teleostei: Gobiidae)

FIGURE 8. Eviota atriventris, head of CAS 233514, paratype, 13.5 mm female. Photograph by D.W. Greenfield.

FIGURE 10 in Eviota atriventris, a New Goby Previously Misidentified as Eviota pellucida Larson (Teleostei: Gobiidae)

FIGURE 10. Underwater photograph of Eviota prasites, male, Amami-oshima Island, the Ryukyu Islands, Japan. Photograph by H. Kanehara.

FIGURE 7 in Eviota atriventris, a New Goby Previously Misidentified as Eviota pellucida Larson (Teleostei: Gobiidae)

FIGURE 7. Eviota atriventris, preserved holotype, ROM 76399, 17.1 mm SL. Photograph by D.W. Greenfield.

FIGURE 4 in Eviota atriventris, a New Goby Previously Misidentified as Eviota pellucida Larson (Teleostei: Gobiidae)

FIGURE 4. Underwater photograph of Eviota pellucida, female, Amamki-oshima Island, the Ryukyu Islands, Japan. Photograph by H. Kanehara.

FIGURE 3 in Eviota atriventris, a New Goby Previously Misidentified as Eviota pellucida Larson (Teleostei: Gobiidae)

FIGURE 3. Underwater photograph of Eviota pellucida, male, Amami-oshima Island, the Ryukyu Islands, Japan. Photograph by H. Kanehara.

FIGURE 2. Eviota pellucida, OMNH 35616 in Eviota atriventris, a New Goby Previously Misidentified as Eviota pellucida Larson (Teleostei: Gobiidae)

FIGURE 2. Eviota pellucida, OMNH 35616, Ishigaki-jima Island, Ryukyu Islands, Japan. Photograph by T. Suzuki.

opencc-zeroAug 2021View details →

Supplementary material 1 from: van Deurs M, Moran NP, Schreiber Plet-Hansen K, Dinesen GE, Azour F, Carl H, Møller PR, Behrens JW (2021) Impacts of the invasive round goby (Neogobius melanostomus) on benthic invertebrate fauna: a case study from the Baltic Sea. NeoBiota 68: 19-30. https://doi.org/10.3897/neobiota.68.67340

S1. Sampling Areas (Figure S1); S2. Taxonomic Groupings S1; S3. Model Specifications (Table S2); S4. Sensitivity Analyses (Table S3, Figure S2)

opennotspecifiedFeb 2010View details →

FIGURE 4 in Fishes as living tracers of connectivity in the tropical western North Atlantic: I. Distribution of the neon gobies, genus Elacatinus (Pisces: Gobiidae)

FIGURE 4. Geographic distribution of Suite 2 Elacatinus: coral-dwelling, cleaning species with subterminal mouth position.

opennotspecifiedFeb 2010View details →

FIGURE 3 in Fishes as living tracers of connectivity in the tropical western North Atlantic: I. Distribution of the neon gobies, genus Elacatinus (Pisces: Gobiidae)

FIGURE 3. Tropical western North Atlantic species of Suite 2 Elacatinus: coral-dwelling, cleaning species with subterminal mouth position. A. Elacatinus sp. 1 (Cayman Islands), B. E. genie (Bahamas), C. E. randalli (photo J.E. Randall), D. E. prochilos (Barbados).