Morphology and diet are decoupled in nearshore notothenoids from King George Island, West Antarctica DOI
Mauricio F. Landaeta,

Matías Pareja,

Mathias Hüne

et al.

Journal of Fish Biology, Journal Year: 2023, Volume and Issue: 104(4), P. 957 - 968

Published: Nov. 30, 2023

Antarctic notothenioid fishes show wide adaptive morphological radiation, linked to habitat preferences and food composition. However, direct comparisons of phenotypic variability feeding habits are still lacking, particularly in stages inhabiting nearshore areas. To assess these relationships, we collected juveniles adults the most common benthic species shallow waters off South Shetland Islands within a similar size range, plunderfish Harpagifer antarcticus, black rockcod Notothenia coriiceps, marbled rossii. Individual ranges varied from 44.0 98.9 mm standard length (LS) (H. antarcticus), 95.8 109.3 LS (N. coriiceps), 63.0 113.0 rossii). Notothenioid fish showed different morphospace variability, being larger for H. antarcticus than other associated with position posterior end operculum, along location relative eye. The evolutionary allometry was low, but static much higher, especially N. diet mainly carnivorous, consisting amphipods euphausiids. Macroalgae were scarce or totally absent gut contents all species. Only an increase prey number ingested volume size. Finally, there significant covariation between shape changes (allometric effects), however, not composition, probably due small range ontogenetic stage similarity (or lack contrast) environment that they utilized.

Language: Английский

Trophic ecology of marine fish DOI
Laure Carassou, David Benhaïm, Marie Vagner

et al.

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 119 - 142

Published: Jan. 1, 2025

Language: Английский

Citations

0
Two contemporaneous morphs of fossil Chanos Lacepède, 1803 (Gonorynchiformes, Chanidae) from Paleocene (Danian) outcrops near Palenque (Mexico) revealed by geometric morphometrics indicate conservatism in milkfishes after the K/Pg boundary DOI Creative Commons

Alberto Figueroa Guadarrama,

Kleyton Magno Cantalice

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(3), P. e0313912 - e0313912

Published: March 5, 2025

We described chanid material from the Paleocene (Danian) localities of División del Norte and Belisario Domínguez near archeological site Palenque, Chiapas State, southeastern Mexico. The parsimony-based morphological phylogeny indicates that specimens are closely related to extant milkfish, Chanos chanos (Teleostei, Ostariophysi), comparative anatomy reveals a remarkable qualitative similarity almost every visible bone. Among synapomorphies for genus Chanos, is pleurostyle or caudal complex, which missing in all other fossils. Extant milkfish highly variable meristic morphometric traits, we found signal quantitative variation with geometric morphometrics tools fossil sample. first dealt post-mortem body torsion landmarks. main analysis shows pattern two forms present both localities. A group bigger head deeper than slender smaller rest, implying types coexisted time space. tested allometry explored scenarios can explain patterns, such as sexual dimorphism sympatric species morphotypes, differential resource utilization jaw, head, depth variations. Furthermore, argue that, alongside stasis, has conserved life history trait fry migration towards near-shore nurseries through protracted (~63mybp). infer fish were juvenile, paleontological assemblage taphonomy suggest exhibit influence marine transitional environments.

Language: Английский

Citations

0
Harpagifer bispinis, but not Patagonotothen tessellata, appears robust to interactive effects of ocean warming and acidification in Southern Patagonia DOI
Eloísa Giménez,

Fabián Alberto Vanella,

Laura Wolinski

et al.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 107123 - 107123

Published: March 1, 2025

Language: Английский

Citations

0
Morphology and diet are decoupled in nearshore notothenoids from King George Island, West Antarctica DOI
Mauricio F. Landaeta,

Matías Pareja,

Mathias Hüne

et al.

Journal of Fish Biology, Journal Year: 2023, Volume and Issue: 104(4), P. 957 - 968

Published: Nov. 30, 2023

Antarctic notothenioid fishes show wide adaptive morphological radiation, linked to habitat preferences and food composition. However, direct comparisons of phenotypic variability feeding habits are still lacking, particularly in stages inhabiting nearshore areas. To assess these relationships, we collected juveniles adults the most common benthic species shallow waters off South Shetland Islands within a similar size range, plunderfish Harpagifer antarcticus, black rockcod Notothenia coriiceps, marbled rossii. Individual ranges varied from 44.0 98.9 mm standard length (LS) (H. antarcticus), 95.8 109.3 LS (N. coriiceps), 63.0 113.0 rossii). Notothenioid fish showed different morphospace variability, being larger for H. antarcticus than other associated with position posterior end operculum, along location relative eye. The evolutionary allometry was low, but static much higher, especially N. diet mainly carnivorous, consisting amphipods euphausiids. Macroalgae were scarce or totally absent gut contents all species. Only an increase prey number ingested volume size. Finally, there significant covariation between shape changes (allometric effects), however, not composition, probably due small range ontogenetic stage similarity (or lack contrast) environment that they utilized.

Language: Английский

Citations

1