Document Detail

Relating the ontogeny of functional morphology and prey selection with larval mortality in Amphiprion frenatus.
MedLine Citation:
PMID:  20101727     Owner:  NLM     Status:  MEDLINE    
Survival during the pelagic larval phase of marine fish is highly variable and is subject to numerous factors. A sharp decline in the number of surviving larvae usually occurs during the transition from endogenous to exogenous feeding known as the first feeding stage in fish larvae. The present study was designed to evaluate the link between functional morphology and prey selection in an attempt to understand how the relationship influences mortality of a marine fish larva, Amphiprion frenatus, through ontogeny. Larvae were reared from hatch to 14 days post hatch (DPH) with one of four diets [rotifers and newly hatched Artemia sp. nauplii (RA); rotifers and wild plankton (RP); rotifers, wild plankton, and newly hatched Artemia nauplii (RPA); wild plankton and newly hatched Artemia nauplii (PA)]. Survival did not differ among diets. Larvae from all diets experienced mass mortality from 1 to 5 DPH followed by decreased mortality from 6 to 14 DPH; individuals fed RA were the exception, exhibiting continuous mortality from 6 to 14 DPH. Larvae consumed progressively larger prey with growth and age, likely due to age related increase in gape. During the mass mortality event, larvae selected small prey items and exhibited few ossified elements. Cessation of mass mortality coincided with consumption of large prey and ossification of key elements of the feeding apparatus. Mass mortality did not appear to be solely influenced by inability to establish first feeding. We hypothesize the interaction of reduced feeding capacities (i.e., complexity of the feeding apparatus) and larval physiology such as digestion or absorption efficiency contributed to the mortality event during the first feeding period.
Justin Anto; Ralph G Turingan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of morphology     Volume:  271     ISSN:  1097-4687     ISO Abbreviation:  J. Morphol.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-06     Completed Date:  2010-08-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0406125     Medline TA:  J Morphol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  682-96     Citation Subset:  IM    
Department of Biology, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, USA.
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MeSH Terms
Adaptation, Physiological / physiology
Aging / physiology
Body Size / physiology
Bone Development / physiology
Digestion / physiology
Feeding Behavior / physiology*
Fishes / anatomy & histology*,  growth & development*
Jaw / anatomy & histology,  physiology
Larva / anatomy & histology*,  growth & development*
Maxillofacial Development / physiology
Predatory Behavior / physiology*

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