Development of dim-light vision in the nocturnal reef fish family Holocentridae. II: Retinal morphology - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Experimental Biology Année : 2022

Development of dim-light vision in the nocturnal reef fish family Holocentridae. II: Retinal morphology

Résumé

Ontogenetic changes in the habitats and lifestyles of animals are often reflected in their visual systems. Coral reef fishes start life in the shallow open ocean but inhabit the reef as juveniles and adults. Alongside this change in habitat, some species also change lifestyles and become nocturnal. However, it is not fully understood how the visual systems of nocturnal reef fishes develop and adapt to these significant ecological shifts over their lives. Therefore, we used a histological approach to examine visual development in the nocturnal coral reef fish family, Holocentridae. We examined 7 representative species spanning both subfamilies, Holocentrinae (squirrelfishes) and Myripristinae (soldierfishes). Pre-settlement larvae showed strong adaptation for photopic vision with high cone densities and had also started to develop a multibank retina (i.e. multiple rod layers), with up to two rod banks present. At reef settlement, holocentrids showed greater adaptation for scotopic vision, with higher rod densities and higher summation of rods onto the ganglion cell layer. By adulthood, they had well-developed scotopic vision with a highly rod-dominated multibank retina comprising 5-17 rod banks and enhanced summation of rods onto the ganglion cell layer. Although the ecological demands of the two subfamilies were similar throughout their lives, their visual systems differed after settlement, with Myripristinae showing more pronounced adaptation for scotopic vision than Holocentrinae. Thus, it is likely that both ecology and phylogeny contribute to the development of the holocentrid visual system.

Domaines

Génétique
Fichier principal
Vignette du fichier
jeb244740.pdf (1.33 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04000059 , version 1 (22-02-2023)

Licence

Identifiants

Citer

Lily G Fogg, Fabio Cortesi, David Lecchini, Camille Gache, N. Justin Marshall, et al.. Development of dim-light vision in the nocturnal reef fish family Holocentridae. II: Retinal morphology. Journal of Experimental Biology, 2022, 225 (17), ⟨10.1242/jeb.244740⟩. ⟨hal-04000059⟩
14 Consultations
49 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More