Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla)
Abstract Being part of the elopomorph group of fishes, Anguillidae species show a leptocephalus larval stage. However, due to largely unknown spawning locations and habitats of their earliest life stages, as well as their transparency, these Anguilla larvae are rarely encountered in nature. Therefor...
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crwiley:10.1111/joa.12335 2024-06-02T07:55:10+00:00 Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) Bouilliart, Mathias Tomkiewicz, Jonna Lauesen, Peter De Kegel, Barbara Adriaens, Dominique European Commission's 7th Framework Programme 2015 http://dx.doi.org/10.1111/joa.12335 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjoa.12335 https://onlinelibrary.wiley.com/doi/pdf/10.1111/joa.12335 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Anatomy volume 227, issue 3, page 325-340 ISSN 0021-8782 1469-7580 journal-article 2015 crwiley https://doi.org/10.1111/joa.12335 2024-05-06T07:01:03Z Abstract Being part of the elopomorph group of fishes, Anguillidae species show a leptocephalus larval stage. However, due to largely unknown spawning locations and habitats of their earliest life stages, as well as their transparency, these Anguilla larvae are rarely encountered in nature. Therefore, information regarding the early life history of these larvae, including their exogenous feeding strategy and feeding performance, is rather scarce. To better understand the structural basis and functional performance of larval feeding in captivity, the functional morphology of the cranial musculoskeletal system in pre‐ and first‐feeding engyodontic leptocephali of the European eel ( Anguilla anguilla ) was studied. A 3D reconstruction of the feeding apparatus (head of the leptocephali < 1 mm) was used to visualize and describe the musculoskeletal changes throughout these stages. To analyze the ontogenetic changes in the functionality of the feeding apparatus towards the active feeding phase, 3D data of joints, levers and muscles derived from the reconstructions were used to estimate bite and joint reaction forces (JRFs). Observing a maximum estimated bite force of about 65 μN (and corresponding JRFs of 260 μN), it can be hypothesized that leptocephalus larvae are functionally constrained to feed only on soft food particles. Additionally, potential prey items are size delimited, based on the theoretically estimated average gape of these larvae of about 100 μm. This hypothesis appears to be in line with recent observations of a diet consisting of small and/or gelatinous prey items (Hydrozoa, Thaliacea, Ctenophora, Polycystenia) found in the guts of euryodontic leptocephalus larvae. Article in Journal/Newspaper Anguilla anguilla European eel Wiley Online Library Journal of Anatomy 227 3 325 340 |
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Wiley Online Library |
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English |
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Abstract Being part of the elopomorph group of fishes, Anguillidae species show a leptocephalus larval stage. However, due to largely unknown spawning locations and habitats of their earliest life stages, as well as their transparency, these Anguilla larvae are rarely encountered in nature. Therefore, information regarding the early life history of these larvae, including their exogenous feeding strategy and feeding performance, is rather scarce. To better understand the structural basis and functional performance of larval feeding in captivity, the functional morphology of the cranial musculoskeletal system in pre‐ and first‐feeding engyodontic leptocephali of the European eel ( Anguilla anguilla ) was studied. A 3D reconstruction of the feeding apparatus (head of the leptocephali < 1 mm) was used to visualize and describe the musculoskeletal changes throughout these stages. To analyze the ontogenetic changes in the functionality of the feeding apparatus towards the active feeding phase, 3D data of joints, levers and muscles derived from the reconstructions were used to estimate bite and joint reaction forces (JRFs). Observing a maximum estimated bite force of about 65 μN (and corresponding JRFs of 260 μN), it can be hypothesized that leptocephalus larvae are functionally constrained to feed only on soft food particles. Additionally, potential prey items are size delimited, based on the theoretically estimated average gape of these larvae of about 100 μm. This hypothesis appears to be in line with recent observations of a diet consisting of small and/or gelatinous prey items (Hydrozoa, Thaliacea, Ctenophora, Polycystenia) found in the guts of euryodontic leptocephalus larvae. |
author2 |
European Commission's 7th Framework Programme |
format |
Article in Journal/Newspaper |
author |
Bouilliart, Mathias Tomkiewicz, Jonna Lauesen, Peter De Kegel, Barbara Adriaens, Dominique |
spellingShingle |
Bouilliart, Mathias Tomkiewicz, Jonna Lauesen, Peter De Kegel, Barbara Adriaens, Dominique Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) |
author_facet |
Bouilliart, Mathias Tomkiewicz, Jonna Lauesen, Peter De Kegel, Barbara Adriaens, Dominique |
author_sort |
Bouilliart, Mathias |
title |
Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) |
title_short |
Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) |
title_full |
Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) |
title_fullStr |
Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) |
title_full_unstemmed |
Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel ( Anguilla anguilla) |
title_sort |
musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the european eel ( anguilla anguilla) |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/joa.12335 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjoa.12335 https://onlinelibrary.wiley.com/doi/pdf/10.1111/joa.12335 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Journal of Anatomy volume 227, issue 3, page 325-340 ISSN 0021-8782 1469-7580 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/joa.12335 |
container_title |
Journal of Anatomy |
container_volume |
227 |
container_issue |
3 |
container_start_page |
325 |
op_container_end_page |
340 |
_version_ |
1800746397623910400 |