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Life‐history constraints, short adult life span and reproductive strategies in coral reef gobies of the genus Trimma
- Source :
- Journal of Fish Biology. 101:996-1007
- Publication Year :
- 2022
- Publisher :
- Wiley, 2022.
-
Abstract
- Body size influences many life-history traits, with small-bodied animals tending to have short life spans, high mortality and greater reproductive effort early in life. In this study, the authors investigated the life-history traits and reproductive strategies of three small-bodied coral reef gobies of the genus Trimma: Trimma benjamini, Trimma capostriatum and Trimma yanoi. The authors found all Trimma species studied attained a small body size of25 mm, had a short life span of140 days and experienced high estimated daily mortality of 3.0%-6.7%. Furthermore, the pelagic larval phase accounted for 25.3%-28.5% of the maximum life span, and maturation occurred between 74.1 and 82.1 days at 15.2-15.8 mm, leaving only 35%-43% of the total life span as a reproductively viable adult. All mature individuals had gonad structures consistent with bidirectional sex change, with bisexual gonads including both ovarian and testicular portions separated by a thin wall of connective tissue. In the female and male phases, only ovaries or testes were mature, whereas gonadal tissue of the non-active sex remained. One T. benjamini individual and one T. yanoi individual had ovarian and testicular tissue active simultaneously. The results of this study highlight the life-history challenges small CRFs face on their path to reproduction and reproductive strategies that could be beneficial in fishes with high and unpredictable mortality and short reproductive life spans.
Details
- ISSN :
- 10958649 and 00221112
- Volume :
- 101
- Database :
- OpenAIRE
- Journal :
- Journal of Fish Biology
- Accession number :
- edsair.doi.dedup.....988a3a8648d1adc8ac1ab27a6ae77c83