NDLI: Defining a spawning population (spotted seatrout Cynoscion nebulosus) over temporal, spatial, and demographic scales

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Defining a spawning population (spotted seatrout Cynoscion nebulosus) over temporal, spatial, and demographic scales

Content Provider	Semantic Scholar
Author	Lowerre-Barbieri, Susan K. Henderson, Nathan Llopiz, Joel K. Walters, Sarah Bickford, Joel W. Muller, Robert Nathan
Copyright Year	2009
Abstract	Fish spawning populations are complex and affected by many factors acting over tem- poral, spatial, and demographic scales. To better understand these factors, we chose to study spotted seatrout Cynoscion nebulosus, which has closed populations over small spatial scales and a periodic life-history pattern. We used experimental gill nets and hook and line, within a spatially and tempo- rally explicit sampling design, to collect 2034 spotted seatrout in lower Tampa Bay, Florida, USA, in 2001 and 2002. Ovarian development was evaluated histologically. Mature females did not all spawn throughout the spawning season, and first-time spawners (Age 1) had the lowest probability of doing so. Two reproductive behaviors were observed: fish moving in the late afternoon or evening to a high-intensity spawning site in an inlet and low-intensity spawning within the estuary. Larger, older female and male spawners were more abundant at the inlet site than at nearby estuarine sites. Both batch fecundity and the percentage of females spawning increased with age and size. Spatial- temporal interactions made it difficult to assess certain aspects of reproduction, such as spawning frequency.
Starting Page	231
Ending Page	245
Page Count	15
File Format	PDF HTM / HTML
DOI	10.3354/meps08262
Volume Number	394
Alternate Webpage(s)	https://www.int-res.com/articles/meps2009/394/m394p231.pdf
Alternate Webpage(s)	https://doi.org/10.3354/meps08262
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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