Protracted volitional spawning of pinfish Lagodon rhomboides and changes in egg quality and fatty-acid composition throughout the spawning season
Document Type
Article
Publication Title
Journal of Fish Biology
Publication Date
9-1-2017
Abstract
Spawning performance of pinfish Lagodon rhomboides without use of hormonal aids was monitored over an extended season. Nearly three million eggs were obtained from 75 spawns collected over a 90-day consecutive period from a single population of four brood fish (1M:1F). A mean ± s.d. batch fecundity of 30·27 ± 22·64 eggs g−1 female was estimated with 98·0 ± 0·06% of the batch composed of floating eggs which were 1·04 ± 0·04 mm in diameter and 85·71 ± 27·59% fertile. Floating eggs successfully hatched 54·65 ± 29·13% of the time which yielded larvae that were 2·59 ± 0·24 mm in length. Fatty acids within floating eggs were largely represented by polyunsaturated fatty acids (45·30 ± 2·14% of total fatty acids) of which linoleic acid [(c18:2n-6cis) 3·49 ± 1·69% trifluoroacetic acid (TFA)] and docosahexaenoic acid (DHA) [(c22:6n-3) 28·47 ± 1·48% TFA] represented the majority of fatty acids for n-6 and n-3 polyunsaturated fatty acids, respectively. The strongest correlations between fatty acids and hatching success and larval survival to first feeding were observed for the DHA:EPA (eicosapentaenoic acid; c20:5n-3) ratio and total n-6 polyunsaturated fatty-acids levels, respectively. These data demonstrate potential for producers to rely on natural spawns for extensive egg production and provide a baseline for future development of natural spawning protocols of captive L. rhomboides.
Volume
91
Issue
3
First Page
806
Last Page
817
DOI
10.1111/jfb.13381
Recommended Citation
Broach, J., Ohs, C., & Breen, N. (2017). Protracted volitional spawning of pinfish Lagodon rhomboides and changes in egg quality and fatty-acid composition throughout the spawning season. Journal of Fish Biology, 91 (3), 806-817. https://doi.org/10.1111/jfb.13381
ISSN
00221112
E-ISSN
10958649
