Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Slembrouck Jacques, Priyadi A., Permana A., Ginanjar R., Baras Etienne, Satyani D., Sudarto, Pouyaud Laurent, Legendre Marc. (2012). Biology and culture of the clown loach Chromobotia macracanthus (Cypriniformes, Cobitidae) : 2- Importance of water movement and temperature during egg incubation. Aquatic Living Resources, 25 (2), 109-118. ISSN 0990-7440

Fichier PDF disponiblehttp://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers15-11/010057061.pdf[ PDF Link ]

Lien direct chez l'éditeur doi:10.1051/alr/2012009

Titre
Biology and culture of the clown loach Chromobotia macracanthus (Cypriniformes, Cobitidae) : 2- Importance of water movement and temperature during egg incubation
Année de publication2012
Type de documentArticle référencé dans le Web of Science WOS:000306431800002
AuteursSlembrouck Jacques, Priyadi A., Permana A., Ginanjar R., Baras Etienne, Satyani D., Sudarto, Pouyaud Laurent, Legendre Marc.
SourceAquatic Living Resources, 2012, 25 (2), p. 109-118. ISSN 0990-7440
RésuméIn comparison to older life stages, the embryonic stages of fishes generally have narrow tolerance ranges for environmental conditions, as regards water quality, temperature and mechanical shocks. The knowledge of these factors is indispensable to appraise the threats brought about by climate or anthropogenic changes upon their resilience, and to define adequate ways of incubating their eggs for an efficient propagation of the species under controlled conditions. Clown loach eggs have a narrow thermal tolerance range in comparison to other tropical and temperate fishes. Hatching occurs at 22-30 degrees C, and non-deformed larvae can only be obtained at 23.8-30.2 degrees C. Furthermore, the thermal tolerance of any particular progeny was found dependent on the maintenance temperature of the female parent, thereby making the actual tolerance no broader than 4.5 degrees C. The (log-log) relationship between the duration of the incubation period and temperature was characterized by a shallow slope, which is more typical of coldwater fishes, as is a narrow thermal tolerance range. On the other hand, clown loach hatched more rapidly (20 h at 26 degrees C) than predicted by existing models on the basis of water temperature and egg diameter, a feature that is shared by other warmwater fishes producing eggs that undergo a strong swelling process (about three times the ova diameter in clown loach). Clown loach embryos are strongly sensitive to mechanical shocks, but their development is not viable either in protracted steady state conditions, in absence of water movement, as they develop various deformities (e. g. pericardial oedema). This is thought to originate from a hypoxic microenvironment around the embryo, as a consequence of an oxygen gradient developing inside and outside the egg, since the boundary diffusion layer is not refreshed by water movement. This issue is worsened by strong egg swelling and incubation at warm temperature.
Plan de classementRessources halieutiques [040]
LocalisationFonds IRD [F B010057061]
Identifiant IRDfdi:010057061
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010057061

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


* PDF Link :

    à télécharger pour citer/partager ce document sur les réseaux sociaux académiques


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito