Freshwater influences on embryos, hatching and larval survival of euryhaline Gulf killifish Fundulus grandis and potential constraints on habitat distribution

The influence of fresh water on potential habitat occupancy of early life‐history stages of euryhaline Gulf killifish Fundulus grandis was determined by evaluating fertilization of freshwater‐spawned eggs and subsequent survival of embryos and larvae in comparison with saline water (salinity 7). Ove...

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Bibliographic Details
Published in:Journal of fish biology 2016-08, Vol.89 (2), p.1466-1472
Main Authors: Ramee, S. W., Allen, P. J.
Format: Article
Language:English
Subjects:
Animals
Ecosystem
euryhaline
Female
Fertilization
Fresh Water
Fundulidae - embryology
Fundulidae - physiology
hatching
hypo-osmotic
Larva - physiology
Male
Ovum
Reproduction
Salinity
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Summary:The influence of fresh water on potential habitat occupancy of early life‐history stages of euryhaline Gulf killifish Fundulus grandis was determined by evaluating fertilization of freshwater‐spawned eggs and subsequent survival of embryos and larvae in comparison with saline water (salinity 7). Overall per cent fertilization of eggs was low (mean ± s.e. = 20·21 ± 0·03%). Embryo survival was greater in saline water, but hatching rate (mean ± s.e. = 81·6 ± 0·1%) and post‐hatch survival of larvae in fresh water (mean ± s.e. = 74·5 ± 0·1%) was relatively high. Therefore, the relative limitation of fresh water on habitat distribution of F. grandis changes with development, stimulating further questions on factors that may constrain habitat distribution of euryhaline fishes.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13022