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497 results for “stickleback”
FIGURE 9. a in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 9. a) Syntype of Gasterosteus tymensis Nikolski, 1889, BMNH 1892.4.28, 58.5 mm SL. b) X-ray photograph of syntype of G. tymensis.
FIGURE 5. a in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 5. a) Syntypes of Gasterosteus platygaster Kessler, 1859, BMNH 1897.7.5.2, 44.4 mm SL. b) X-ray photograph of syntypes of G. platygaster, 44.4 mm SL. c) Syntypes of G. platygaster Kessler, 1859, BMNH 1897.7.5.2, 39.3 mm SL. d) X-ray photograph of syntypes of G. platygaster, 39.3 mm SL.
FIGURE 4. a in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 4. a) Living female Pungitius modestus, sp. nov. out of the breeding season. NSMT-P 136597, 41.3 mm SL, Tendo, Yamagata Prefecture, Honshu, Japan. b) Living male in the breeding season (photographed by T. Takeda, May 1992). c) Living female in the breeding season (photographed by T. Takeda, May 1992).
FIGURE 11 in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 11. Comparisons of lateral plates of Pungitius modestus and P. kaibarae. a) Pungitius modestus, sp. nov., paratype, NSMT-P 140554, 40.5 mm SL. b) P. kaibarae, holotype, ZUMT 8197, 45.0 mm SL. c) P. kaibarae from Korea, non-type, NSMT-P 140556, 31.8 mm SL. Edges of the lateral plates are shown in red.
FIGURE 8. a in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 8. a) Syntypes of Gasterosteus bussei Warpachowski, 1888, ZIN 7100, 42–53 mm SL. b) X-ray photograph of syntypes of G. bussei.
FIGURE 2. a in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 2. a) Freshly dead holotype of Pungitius modestus, sp. nov., NSMT-P 133674, female, 45,4 mm SL, Tendo, Yamagata Prefecture, Honshu, Japan. b) Holotype preserved in 70% ethanol.
FIGURE 3 in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 3. Pectoral and pelvic girdles of Pungitius modestus, sp. nov., paratype, NSMT-P 140554, male, 38.7 mm SL, Higashine, Yamagata Prefecture, Honshu, Japan. a) Lateral view. b) Ventral view.
FIGURE 10. a in A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan
FIGURE 10. a) Holotype of Pygosteus kaibarae Tanaka, 1915, ZUMT 8197, 45.0 mm SL (photographed by K. Hosoya). b) Pungitius kaibarae from Korea, NSMT-P 140556, 31.8 mm SL, Gangneung, Gangwon-do, Korea.
Data from: Geothermal stickleback populations prefer cool water despite multigenerational exposure to a warm environment
<p>Given the threat of climate change to biodiversity, a growing number of studies are investigating the potential for organisms to adapt to rising temperatures. Earlier work has predicted that physiological adaptation to climate change will be accompanied by a shift in temperature preferences, but empirical evidence for this is lacking. Here, we test whether exposure to different thermal environments has led to changes in preferred temperatures in the wild. Our study takes advantage of a 'natural experiment' in Iceland, where freshwater populations of threespine sticklebacks (Gasterosteus aculeatus) are found in waters warmed by geothermal activity year-round (warm habitats), adjacent to populations in ambient-temperature lakes (cold habitats). We used a shuttle-box approach to measure temperature preferences of wild-caught sticklebacks from three warm-cold population pairs. Our prediction was that fish from warm habitats would prefer higher water temperatures than those from cold habitats. We found no support for this, as fish from both warm and cold habitats had an average preferred temperature of 13oC. Thus, our results challenge the assumption that there will be a shift in ectotherm temperature preferences in response to climate change. In addition, since warm-habitat fish can persist at relatively high temperatures despite a lower temperature preference, this suggests that preferred temperature alone may be a poor indicator of a population's adaptive potential to a novel thermal environment.</p>
Climate-driven habitat change causes evolution in Threespine Stickleback
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Data from: A four-questions perspective on public information use in sticklebacks (Gasterosteidae)
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Data from: Repeated and predictable patterns of ecotypic differentiation during a biological invasion: lake-stream divergence in parapatric Swiss stickleback
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Data from: A test of the "flexible stem" model of evolution: ancestral plasticity, genetic accommodation, and morphological divergence in the threespine stickleback radiation
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Data from: Maternal predator-exposure has life-long consequences for offspring learning in threespined sticklebacks
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Data from: Predation cost of a sexual signal in the threespine stickleback
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Data from: Hybridization between distant lineages increases adaptive variation during a biological invasion: stickleback in Switzerland
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Data from: Constraints on speciation suggested by comparing lake-stream stickleback divergence across two continents
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Data from: Genetic divergence in morphology-performance mapping between Misty Lake and inlet stickleback
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Data from: Rapid adaptive evolution of colour vision in the threespine stickleback radiation
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Data from: Does plasticity enhance or dampen phenotypic parallelism? A test with three lake-stream stickleback pairs.
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