Musculoskeletal anatomy and feeding performance of pre-feeding engyodontic larvae of the European eel (Anguilla anguilla)
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, inform...
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ftdtupubl:oai:pure.atira.dk:publications/fc34ab4a-b440-42fe-ae4c-d5234053d0b6 2024-04-28T07:55:05+00:00 Musculoskeletal anatomy and feeding performance of pre-feeding engyodontic larvae of the European eel (Anguilla anguilla) Bouilliart, M. Tomkiewicz, Jonna Lauesen, P. De Kegel, Barbara Adriaens, Dominique 2015 https://orbit.dtu.dk/en/publications/fc34ab4a-b440-42fe-ae4c-d5234053d0b6 https://doi.org/10.1111/joa.12335Document eng eng https://orbit.dtu.dk/en/publications/fc34ab4a-b440-42fe-ae4c-d5234053d0b6 info:eu-repo/semantics/openAccess Bouilliart , M , Tomkiewicz , J , Lauesen , P , De Kegel , B & Adriaens , D 2015 , ' Musculoskeletal anatomy and feeding performance of pre-feeding engyodontic larvae of the European eel (Anguilla anguilla) ' , Journal of Anatomy , vol. 227 , no. 3 , pp. 325-340 . https://doi.org/10.1111/joa.12335Document article 2015 ftdtupubl https://doi.org/10.1111/joa.12335Document 2024-04-10T14:32:34Z 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 <1mm) 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 65μN (and corresponding JRFs of 260μN), 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 100μm. 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 Technical University of Denmark: DTU Orbit |
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Technical University of Denmark: DTU Orbit |
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English |
description |
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 <1mm) 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 65μN (and corresponding JRFs of 260μN), 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 100μm. 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 |
format |
Article in Journal/Newspaper |
author |
Bouilliart, M. Tomkiewicz, Jonna Lauesen, P. De Kegel, Barbara Adriaens, Dominique |
spellingShingle |
Bouilliart, M. Tomkiewicz, Jonna Lauesen, P. De Kegel, Barbara Adriaens, Dominique Musculoskeletal anatomy and feeding performance of pre-feeding engyodontic larvae of the European eel (Anguilla anguilla) |
author_facet |
Bouilliart, M. Tomkiewicz, Jonna Lauesen, P. De Kegel, Barbara Adriaens, Dominique |
author_sort |
Bouilliart, M. |
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) |
publishDate |
2015 |
url |
https://orbit.dtu.dk/en/publications/fc34ab4a-b440-42fe-ae4c-d5234053d0b6 https://doi.org/10.1111/joa.12335Document |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Bouilliart , M , Tomkiewicz , J , Lauesen , P , De Kegel , B & Adriaens , D 2015 , ' Musculoskeletal anatomy and feeding performance of pre-feeding engyodontic larvae of the European eel (Anguilla anguilla) ' , Journal of Anatomy , vol. 227 , no. 3 , pp. 325-340 . https://doi.org/10.1111/joa.12335Document |
op_relation |
https://orbit.dtu.dk/en/publications/fc34ab4a-b440-42fe-ae4c-d5234053d0b6 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/joa.12335Document |
_version_ |
1797578402782248960 |