Mode of miniaturisation influences body shape evolution in New World anchovies (Engraulidae)

Bloom, Devin D.; Kolmann, Matthew A.; Foster, Kimberly; Watrous, Helen

doi:10.1111/jfb.14205

Cited by 6 publications

(3 citation statements)

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“…Supporting this idea is the fact that Belonion matures at miniscule sizes (5 cm), has an elongated lower jaw but short upper jaw (observed in many subadult needlefish species; Lovejoy et al, 2004), and has lost or reduced both axial and appendicular skeletal elements (Collette, 1966). Overall, these findings suggest strong selection for reduced body sizes in Neotropical freshwater taxa (Weitzman & Vari, 1988) and multiple means by which that selection can effect changes (Bloom et al, 2020).…”

Section: Discussionmentioning

confidence: 95%

“…Many pelagic marine fishes likely maintain larger size to migrate large distances, evade, or outgrow open‐ocean predators (e.g., tunas, billfishes, and sharks), and pursue elusive, strong‐swimming prey (Webb, 1984). Smaller body sizes and left‐skewed body size distributions of freshwater fish communities (Griffiths, 2012) appear to be a feature of both Neotropical primary freshwater fishes (Steele & López‐Fernández, 2014) and invaders of freshwater such as needlefishes, anchovies (Bloom, Kolmann, Foster, & Watrous, 2020; Roberts, 1984), pufferfishes (Santini et al, 2013), and stingrays (Carvalho, Rosa, & Araújo, 2016; Monkolprasit & Roberts, 1990). Our study provides additional evidence that selection toward size‐related adaptive peaks can be strong (Bloom et al, 2018; Burns & Bloom, 2020), possibly because body size covaries with many other phenotypic and life history traits (Romanuk, Hayward, & Hutchings, 2011), offering multiple selective surfaces (Peters, 1986).…”

Section: Discussionmentioning

confidence: 99%

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Habitat transitions alter the adaptive landscape and shape phenotypic evolution in needlefishes (Belonidae)

Kolmann

Burns

et al. 2020

Ecology and Evolution

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Habitat occupancy can have a profound influence on macroevolutionary dynamics, and a switch in major habitat type may alter the evolutionary trajectory of a lineage. In this study, we investigate how evolutionary transitions between marine and freshwater habitats affect macroevolutionary adaptive landscapes, using needlefishes (Belonidae) as a model system. We examined the evolution of body shape and size in marine and freshwater needlefishes and tested for phenotypic change in response to transitions between habitats. Using micro‐computed tomographic (µCT) scanning and geometric morphometrics, we quantified body shape, size, and vertebral counts of 31 belonid species. We then examined the pattern and tempo of body shape and size evolution using phylogenetic comparative methods. Our results show that transitions from marine to freshwater habitats have altered the adaptive landscape for needlefishes and expanded morphospace relative to marine taxa. We provide further evidence that freshwater taxa attain reduced sizes either through dwarfism (as inferred from axial skeletal reduction) or through developmental truncation (as inferred from axial skeletal loss). We propose that transitions to freshwater habitats produce morphological novelty in response to novel prey resources and changes in locomotor demands. We find that repeated invasions of different habitats have prompted predictable changes in morphology.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Habitat transitions alter the adaptive landscape and shape phenotypic evolution in needlefishes (Belonidae)

Kolmann

Burns

et al. 2020

Ecology and Evolution

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“…Although the description of miniature forms and their adaptive relationships have been addressed since classical works by Haeckel 39 , current phylogenetic approaches might elucidate the tempo and mode of evolution in body size of species and/or lineages [40][41][42] . However, the few studies available based on molecular data involving the miniature genera Microphilypnus have generated contrasting evolutionary scenarios.…”

Section: Miniaturization In Eleotridsmentioning

confidence: 99%

Phylogenetic relationships of sleeper gobies (Eleotridae: Gobiiformes: Gobioidei), with comments on the position of the miniature genus Microphilypnus

Macate

Bessa-Silva

Caires

et al. 2022

Sci Rep

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Microphilypnus and Leptophilypnion are miniaturized genera within the family Eleotridae. The evolutionary relationships among these taxa are still poorly understood, and molecular analyses are restricted to mitochondrial genes, which have not been conclusive. We compiled both mitochondrial and nuclear genes to study the phylogenetic position of Microphilypnus and the evolutionary history and relationships of eleotrids. We propose that Microphilypnus and Leptophilypnus (a non-miniature genus) are not sister groups as suggested by previous studies, but rather separate lineages that arose in the early Eocene, with Leptophilypnus recovered as a sister group to the other analyzed eleotrids. In fact, Microphilypnus is currently associated with the Neotropical clade Guavina/Dormitator/Gobiomorus. We also identified a well-supported clade that indicated Gobiomorus and Hemieleotris as paraphyletic groups, besides a close relationship among Calumia godeffroyi, Bunaka gyrinoides, Eleotris and Erotelis species. This is the first comprehensive report about the evolutionary relationships in members of the family Eleotridae, including multiloci and multispecies approaches. Therefore, we provided new insights about the phylogenetic position of some taxa absent in previous studies, such as the miniature genus Microphilypnus and a recently described species of Eleotris from South America.

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Phylogenetic structure of body shape in a diverse inland ichthyofauna

Torgersen,

Bouton,

Hebert

et al. 2023

Sci Rep

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Body shape is a fundamental metric of animal diversity affecting critical behavioral and ecological dynamics and conservation status, yet previously available methods capture only a fraction of total body-shape variance. Here we use structure-from-motion (SFM) 3D photogrammetry to generate digital 3D models of adult fishes from the Lower Mississippi Basin, one of the most diverse temperate-zone freshwater faunas on Earth, and 3D geometric morphometrics to capture morphologically distinct shape variables, interpreting principal components as growth fields. The mean body shape in this fauna resembles plesiomorphic teleost fishes, and the major dimensions of body-shape disparity are similar to those of other fish faunas worldwide. Major patterns of body-shape disparity are structured by phylogeny, with nested clades occupying distinct portions of the morphospace, most of the morphospace occupied by multiple distinct clades, and one clade (Acanthomorpha) accounting for over half of the total body shape variance. In contrast to previous studies, variance in body depth (59.4%) structures overall body-shape disparity more than does length (31.1%), while width accounts for a non-trivial (9.5%) amount of the total body-shape disparity.

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Mode of miniaturisation influences body shape evolution in New World anchovies (Engraulidae)

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Cited by 6 publications

References 53 publications

Habitat transitions alter the adaptive landscape and shape phenotypic evolution in needlefishes (Belonidae)

Habitat transitions alter the adaptive landscape and shape phenotypic evolution in needlefishes (Belonidae)

Phylogenetic relationships of sleeper gobies (Eleotridae: Gobiiformes: Gobioidei), with comments on the position of the miniature genus Microphilypnus

Phylogenetic structure of body shape in a diverse inland ichthyofauna

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