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113 results for “pipefish”
Fig. 1 in Collaborative monitoring of the ornamental trade of seahorses and pipefishes (Teleostei: Syngnathidae) in Brazil: Bahia State as a case study
Fig. 1. Map showing the Baía de Todos os Santos, the main area of collection of live syngnathids in Salvador, Bahia State, NE Brazil.
Fig. 3. a in Collaborative monitoring of the ornamental trade of seahorses and pipefishes (Teleostei: Syngnathidae) in Brazil: Bahia State as a case study
Fig. 3. a) Specimen of Micrognathus sp., Baía de Todos os Santos, Bahia State, Brazil. b) Specimen of Cosmocampus albirostris, Baía de Todos os Santos, Bahia State, Brazil. Photos: Cláudio L. S. Sampaio.
Fig. 4 in Collaborative monitoring of the ornamental trade of seahorses and pipefishes (Teleostei: Syngnathidae) in Brazil: Bahia State as a case study
Fig. 4. Hooka-diver using hand-nets to collect marine ornamental fishes. Baía de Todos os Santos, Bahia State, Brazil. Photo: Leo Dutra.
Fig. 1 in Diet composition and feeding strategy of the southern pipefish Syngnathus folletti in a Widgeon grass bed of the Patos Lagoon Estuary, RS, Brazil
Fig. 1. Relationship between mouth gape (a) and prey size (b) with total length (in mm) of female (open circles) and male (dots) individuals of the southern pipefish Syngnathus folletti.
Fig. 3 in Diet composition and feeding strategy of the southern pipefish Syngnathus folletti in a Widgeon grass bed of the Patos Lagoon Estuary, RS, Brazil
Fig. 3. Conceptual diagram showing the microhabitat distribution within the Widgeon grass bed of some benthic macroinvertebrates consumed by Syngnathus folletti. Gastropoda: 1. Heleobia australis; Tanaidacea: 2. Kalliapseudes schubartii, 3. Tanais stanfordi; Isopoda: 4. Dies fluminensis, 5. Uromunna peterseni; Amphipoda: 6. Mellita mangrovi.
Fig. 4 in Kyonemichthys rumengani (Teleostei: Syngnathidae) is Sister Taxon to the Pipefish Genus Urocampus: Genetic and Morphological Evidence
Fig. 4. Maximum likelihood (ML) tree of 74 syngnathid species based on mitochondrial DNA sequences from 12S, 16S, and CO1. Numbers on branches are ML bootstrap values; those below 50% are not shown.
Fig. 1 in Kyonemichthys rumengani (Teleostei: Syngnathidae) is Sister Taxon to the Pipefish Genus Urocampus: Genetic and Morphological Evidence
Fig. 1. Photograph of preserved specimen of Kyonemichthys rumengani (OCF-P 10439, 25.6 mm SL) collected from Okinawa Island, Ryukyu Islands.
Figure 7 in A new pipefish, Stigmatopora narinosa (Syngnathidae) from South Australia
Figure 7. Known locations (•) of the Southern Gulf Pipefish Stigmatopora narinosa sp. nov. in South Australia. The range of S. narinosa extends from south-eastern Spencer Gulf, along the lower half of western Gulf St.Vincent with a localised population in eastern Gulf St Vincent.
Figure 6. A in A new pipefish, Stigmatopora narinosa (Syngnathidae) from South Australia
Figure 6. A side (a) and dorsal (b) view of S. nigra (upper; Kaup 1853) and also of S. argus (lower, b,c; Richardson 1840) from South Australia. Both species have a relatively longer more tubular snout than S. narinosa, with S. argus having a longer snout than S. nigra.
Figure 5. A in A new pipefish, Stigmatopora narinosa (Syngnathidae) from South Australia
Figure 5. A side (a) and dorsal (b) view of Stigmatopora nigra (upper; Kaup, 1853) and also of S. argus (lower, b,c; Richardson, 1840) from South Australia. Both species have a relatively longer more tubular snout than S. narinosa, with S. argus having a longer snout than S. nigra.
Figure 1. S in A new pipefish, Stigmatopora narinosa (Syngnathidae) from South Australia
Figure 1. S. narinosa sp. nov. from Port Victoria, Spencer Gulf, with its prehensile tail coiled around macroalgae. The parasite is an isopod which is also commonly found on the leafy seadragon (Phycodurus equis). Image Graham Short.
Figure 3 in A new pipefish, Stigmatopora narinosa (Syngnathidae) from South Australia
Figure 3. Side view of Stigmatopora narinosa sp. nov. (Paratype SAM F10195). The tail tapers to a point without a caudal fin.
Data from: Population genomics reveals multiple drivers of population differentiation in a sex-role-reversed pipefish
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The population genomics of repeated freshwater colonizations by Gulf Pipefish
<p class="abstract_para">How organisms adapt to the novel challenges imposed by the colonization of a new habitat has long been a central question in evolutionary biology. When multiple populations of the same species independently adapt to similar environmental challenges, the question becomes whether the populations have arrived at their adaptations through the same genetic mechanisms. In recent years, genetic techniques have been used to tackle these questions by investigating the genome‐level changes underlying local adaptation. Here, we present a genomic analysis of colonization of freshwater habitats by a primarily marine fish, the Gulf pipefish (<em>Syngnathus scovelli</em>). We sample pipefish from four geographically distinct freshwater locations and use double‐digest restriction site associated DNA sequencing to compare them to 12 previously studied saltwater populations. The two most geographically distant and isolated freshwater populations are the most genetically distinct, although demographic analysis suggests that these populations are experiencing ongoing migration with their saltwater neighbours. Additionally, outlier regions were found genome‐wide, showing parallelism across ecotype pairs. We conclude that these multiple freshwater colonizations involve similar genomic regions, despite the large geographical distances and different underlying mechanisms. These similar patterns are probably facilitated by the interacting effects of intrinsic barriers, gene flow among populations and ecological selection in the Gulf pipefish.</p>
Reduced sexual size dimorphism in a pipefish population where males do not prefer larger females
<p><span>Within a species' distribution, populations are often exposed to diverse environments and may thus experience different sources of both natural and sexual selection. These differences are likely to impact the balance between costs and benefits to individuals seeking reproduction, thus entailing evolutionary repercussions. Here, we look into an unusual population (Baltic Sea) of the broadnosed pipefish, <i>Syngnathus typhle</i>, where males do not seem to select females based on size and hypothesise that this pattern may derive from a reduction of direct benefits to the male. We further hypothesise that if larger females do not persistently secure a higher reproductive success, either through pre- or post-copulatory sexual selection, a decrease in sexual size dimorphism in the Baltic population should be apparent, especially when contrasted with a well-studied population, inhabiting similar latitudes (Swedish west coast), where males prefer larger females.</span></p> <p>We found that, in the Baltic population, variation in female quality is low. We were unable to find differences in abortion rates or protein concentration in oocytes produced by females of contrasting sizes. Direct benefits from mating with large partners seem, thus, reduced in the Baltic population. We also found no evidence of any post-copulatory mechanism that could favour larger mothers as embryo development was unrelated to female size. While female size can still be selected through intrasexual competition or fecundity selection, the pressure for large female body size seems to be lower in the Baltic. Accordingly, we found a noticeable decrease in sexual size dimorphism in the Baltic population. We conclude that, although far from negating the significance of other selective process, sexual selection seems to have a decisive role in supporting pipefish sexual size asymmetries.</p>
Figure 3 in Preliminary report of a biometric analysis of greater pipefish Syngnathus acus Linnaeus, 1758 for the western Black Sea
Figure 3. Length–weight relationship of S. acus from catches in the western Black Sea.
Figure 2 in Preliminary report of a biometric analysis of greater pipefish Syngnathus acus Linnaeus, 1758 for the western Black Sea
Figure 2. Diagram of morphometric measurements of pipefishes.
Figure 1 in Preliminary report of a biometric analysis of greater pipefish Syngnathus acus Linnaeus, 1758 for the western Black Sea
Figure 1. Sampling stations.
Figure 1 in Syngnathus chihiroe, a new species of pipefish (Syngnathidae) from southern Japan
Figure 1. – Preserved specimen of Centrogenys vaigiensis [FAKU 103752, 73.7 mm SL, Mauritius].
Fig. 3 in Kyonemichthys rumengani (Teleostei: Syngnathidae) is Sister Taxon to the Pipefish Genus Urocampus: Genetic and Morphological Evidence
Fig. 3. Aquarium photograph of Kyonemichthys rumengani (OCF-P 10439, 25.6 mm SL).
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