Kelly L. Denit’s research while affiliated with University of Miami and other places

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Publications (4)


Table 1 Exponential regression of standard length (SL) at age for Atlantic blue marlin and sailfish from the Straits of Florida, 2003-2004
Fig. 6 Detrended recent growth (DRG) during the last two complete days prior to collection of blue marlin (n = 134) and sailfish (n = 130) larvae \9 mm SL according to percentage of prey type in gut. Prey types were a copepods in the genus Farranula and b cladocerans in the genus Evadne. Blue marlin with [66.6% Farranula in their guts grew faster than larvae with \33.3 and 33.3-66.6% Farranula in their guts (ANCOVA: P = 0.002; Bonferroni multiple comparison). No other comparisons were significant
Fig. 7 Numerical proportions of prey types consumed by small (\9 mm SL) and large (C9 mm SL) larval a, b blue marlin and c, d sailfish from the western and eastern regions of the Straits of Florida. Data are from all larvae that were inspected (not only those that were aged) and are from the same individuals analyzed in Llopiz and Cowen (2008). Number of larvae inspected indicated above each bar
Variation in pelagic larval growth of Atlantic billfishes: The role of prey composition and selective mortality
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April 2010

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130 Reads

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29 Citations

Marine Biology

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Kelly L. Denit

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Robert K. Cowen

Atlantic blue marlin (Makaira nigricans) and sailfish (Istiophorus platypterus) larvae were collected from 10monthly cruises (June–October 2003 and 2004) across the Straits of Florida to test (1) whether growth differed between the more productive western region near the Florida shelf, and the less productive eastern region toward the Bahamas, and (2) whether growth was related to prey consumption. Examination of larval sagittal otoliths revealed that instantaneous growth and daily growth during the first 2–3weeks of life did not vary significantly between the two regions for either species. However, recent growth during the last two full days prior to collection was greater in the west for blue marlin larvae. Recent growth of blue marlin larvae<9mm SL (primarily zooplanktivorous) was significantly related to prey composition (faster growth when higher proportions of Farranula copepods were consumed). Western larvae grew faster and had higher proportions of Farranula in their guts. Trends for sailfish larvae were not significant. In both species, comparison of early growth between<9 and≥9mm SL size groups indicated that growth trajectories diverged around 5–8mm SL, the time when billfish larvae become capable of piscivory. Significantly faster growth of larger (older) larvae suggests that mortality was selective for fast growers and that the transition to piscivory may be a critical point in the early life of billfish.

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Growth variation in larval Makaira nigricans

March 2005

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27 Reads

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32 Citations

The Atlantic blue marlin Makaira nigricans larvae were collected from Exuma Sound, Bahamas and the Straits of Florida over three summers (2000–2002). Sagittal otoliths were extracted and read under light microscopy to determine relationships between standard length (LS) and age for larvae from each year and location. Otolith growth trajectories were significantly different between locations: after the first 5–6 days of life, larvae from Exuma Sound grew significantly faster than larvae from the Straits of Florida. Exponential regression coefficients were similar among years for Exuma Sound larvae (mean instantaneous growth rate, GL = 0·125), but differed between years for larvae from the Straits of Florida (GL = 0·086–0·089). Differences in larval growth rates between locations resulted in a 4–6 mm difference in LS by day 15 of larval life. These differences in growth appeared to be unrelated to mean ambient water temperatures, and may have been caused by location‐specific differences in prey composition or availability. Alternatively, population‐specific differences in maternal condition may have contributed to these differences in early larval growth.


Growth Variation, Settlement, and Spawning of Gray Snapper across a Latitudinal Gradient

November 2004

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342 Reads

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66 Citations

Transactions of the American Fisheries Society

Newly recruited juvenile gray snapper Lutjanus griseus were collected each fall for two consecutive years (2000 and 2001) from sites in Florida and North Carolina. Spawning, settlement, and growth patterns were compared across sites based on otolith microstructure. Larval otolith growth trajectories were generally similar for larvae from different sites and years; however, the mean pelagic larval duration (PLD) was 1 d longer for fish from North Carolina than for fish from the more southern sites. As a result, fish were larger at settlement to North Carolina. Estimated juvenile growth rates ranged between 0.62 and 0.88 mm/d and differed across sites and years, growth being generally faster at the southern sites. Water temperature accounts for some of this variability; however, site-specific differences in other factors probably contributed to some of the observed differences in growth. Back-calculated spawning patterns showed a lunar association with the new and first-quarter moons at all sites except for North Carolina. Settlement patterns were lunar cyclic as well: settlement pulsed during the third-quarter and new moons at all sites, and in North Carolina an additional pulse associated with the full moon was present. Patterns of larval and juvenile growth coupled with recruitment dynamics across the latitudinal gradient are consistent with northward Gulf Stream transport of larvae from southern spawning sites.


Citations (4)


... Gray Snapper Lutjanus griseus is a lutjanid whose range extends from the southeastern United States and Gulf of Mexico to South America (Burton 2001;Fischer et al. 2005). Larvae disperse through a planktonic phase in which they can drift into temperate waters of the northeastern United States via the Gulf Stream, an area well outside their effective adult range (Sumner et al. 1911;Denit and Sponaugle 2004;Schwartz 2007). This planktonic phase typically lasts from 20 to 33 days (Allman and Grimes 2002;Denit and Sponaugle 2004), after which recent settlers occupy sea grass beds and mangroves in coastal estuaries (Chester and Thayer 1990;Faunce and Serafy 2007). ...

Reference:

Age, growth, maturity, and mortality of an understudied Gray Snapper fishery from the north‐central Gulf of Mexico
Growth Variation, Settlement, and Spawning of Gray Snapper across a Latitudinal Gradient

Transactions of the American Fisheries Society

... Ikan merupakan bahan pangan yang kaya akan nutrisi, khususnya protein dan lemak. Ikan Thok, memiliki sirip punggung yang dikembangkan serta sering terlihat dipermukaan (Sponaugle et al., 2005). Ikan ini termasuk jenis ikan setuhuk atau ikan pedang. ...

Growth variation in larval Makaira nigricans
  • Citing Article
  • March 2005

... Somatic growth provides the ideal trait to measure effects of climate variability on fish, particularly tropical species, as it is typically correlated to water temperature. For example, the growth rate at which the asymptotic length is approached (von Bertalanffy growth coefficient k) decreases from warmer to cooler water temperatures in a trend that corresponds with theoretical predictions by the Metabolic Theory of Ecology (Angilletta Jr et al. 2004;Brown et al. 2004;Charnov and Gillooly 2004;Denechaud et al. 2020;Ong et al. 2015;Rountrey et al. 2014;Sponaugle et al. 2010). Departures from growth patterns predicted by MTE have also been observed, including the converse relationship between growth and water temperature (Cossington et al. 2010), or a parabolic relationship with greater or reduced growth performance toward the extents of a species' latitudinal distribution (i.e., edge of range effects, Boddington et al. 2021;Wakefield et al. 2017a). ...

Variation in pelagic larval growth of Atlantic billfishes: The role of prey composition and selective mortality

Marine Biology

... Gray Snapper (also known as Mangrove Snapper) are found in the estuarine and marine waters of the western Atlantic Ocean from North Carolina to Brazil, including the Caribbean, Gulf of Mexico, and Bermuda (Starck and Schroeder 1971;Rutherford et al. 1989b;Andrade and Santos 2019). Larval Gray Snapper settle out of their planktonic stage into estuarine seagrass beds, mangroves, or oyster reefs (Allman and Grimes 2002;Denit and Sponaugle 2004) where they reside until subadult or adult life stages. Adults are thought to move offshore into coral or rocky reef habitats where they aggregate to spawn in summer months during the new (Starck and Schroeder 1971;Manooch and Matheson 1984;Domeier et al. 1996) or full moon (Claro and Lindeman 2003). ...

Growth of early stage gray snapper, Lutjanus griseus, across a latitudinal gradient /
  • Citing Article