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External and internal morphology, and feeding ability of yellow seahorse hippocampus kuda (Bleeker, 1852) early juveniles


Kamarudin, Mohd Salleh and Romano, Nicholas and Arshad, Aziz and Wong, Nur Leena Wai Sin and Teh, Jun Chin (2020) External and internal morphology, and feeding ability of yellow seahorse hippocampus kuda (Bleeker, 1852) early juveniles. Journal of Environmental Biology, 41 (5). 1138 - 1146. ISSN 0254-8704; ESSN: 2394-0379


Aim: Despite their well-known strategy of brooding in male pouches, survival of early juveniles of seahorses still represents a significant bottleneck to its population survival. This study aimed to address the feeding and digestive efficiency of early Hippocampus kuda in order to improve their survival. Methodology: The external and gut morphology of H. kuda juveniles in the immediate period after being released from the brood pouch (0–9 day-afterbirth) were examined and described through histological and microscopic. Results: Unlike premature seahorses with a round-shaped yolk sac attached to their semi-transparent body, the normal newborns had no external yolk sac but some yolk residues were observed internally. Although the mouth gape size, mouth area, height and tail length grew bigger and longer in the older juveniles, the intestine length increased isometrically with height. Ingested live food was poorly digested in early juveniles and some Artemia nauplii were found to be still alive in the excreta. Interpretation: Overall, the results indicated that the early feeding of H. kudawas highly inefficient. Depletion of remnant yolk in H. kuda suggested partial lecithotrophy during the first two days. These findings prov ide an important insight for developing nursing methods for this seahorse species.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
DOI Number: https://doi.org/10.22438/jeb/41/5(SI)/MS_04
Publisher: Triveni Enterprises
Keywords: Critical period; Digestive tract; Histology; Lecithotrophy; Mass mortality
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 04 Oct 2021 22:40
Last Modified: 04 Oct 2021 22:40
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.22438/jeb/41/5(SI)/MS_04
URI: http://psasir.upm.edu.my/id/eprint/88937
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