| Female maturation, egg characteristics and fatty acids profile in the seahorse Hippocampus guttulatus. | |
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MedLine Citation:
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PMID: 20727689 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Knowledge of the biology and ecology of seahorses (Hippocampus spp.) is scarce, but has been increasing in recent years due to their conservation status. Captivity breeding programmes can be a valuable source of information on the reproductive biology of seahorses. A captive broodstock of Hippocampus guttulatus Cuvier 1829 was established in 2006 and kept under natural-like photoperiod and temperature. Female maturation was studied during the whole reproductive season in 2007. Most egg clutches were released from May (17°C; 15L:9D) to October (18°C; 13L:11D), with peak releases occurring in June-August (20°C; 16L:8D-14L:10D). Throughout the study, four egg morphotypes were found; two regression equations were proposed for estimating egg/yolk volume based on measurements of egg and yolk biometrics. Female weight was positively correlated with yolk volume/egg volume ratio (Y(v)/E(v)) (r(s)=0.523, n=21, P<0.05) but not with E(v) or Y(v). Egg dry weight (567±141μg) was correlated with Y(v) (r(s)=0.384, n=31, P<0.05). Mean clutch size and clutch biomass were 242±142 eggs and 137±87mg dry weight, respectively. Clutch size was positively correlated to female weight (r(s)=0.479, n=25, P<0.05). Inter-clutch intervals (days) were affected by temperature (°C) as described by the following equation: Interval=357.55e(-0.1283 Temp). Estimated inter-clutch intervals at 16, 18 and 20°C were 45.9, 35.5 and 27.5 days, respectively. Egg total lipids accounted for 31.9±3.1% dry weight. Absolute lipid content in eggs was correlated with egg dry weight (r(s)=0.907, n=41, P<0.001) and Y(v) (r(s)=0.384, n=41, P<0.5). In decreasing order of relative percentage, the most important fatty acids, were 18:1n9, 16:0, 18:2n6, 20:5n3, 18:0 and 22:6n-3. The level of n-3 HUFA was 18.5±0.7% (38.4±3.3mg/g dry weight). The profile of fatty acids in eggs resembled that displayed by the broodstock diet (enriched adult Artemia). |
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Authors:
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M Planas; P Quintas; A Chamorro; C Silva |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-27 |
Journal Detail:
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Title: Animal reproduction science Volume: 122 ISSN: 1873-2232 ISO Abbreviation: Anim. Reprod. Sci. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-10-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7807205 Medline TA: Anim Reprod Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 66-73 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Instituto de Investigaciones Marinas (CSIC), 36208 Vigo, Spain. mplanas@iim.csic.es |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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