Dwarf (Hippocampus zosterae)

Figure 1: Mean number of Hippocampus zosterae caught per sample (+/- Standard Deviation; 21.3 m beach/boat seine, covering 140 m² each area sampled) over most recent 10-year span for all sites combined.

THE IUCN RED LIST OF THREATENED SPECIES™

Figure 2: Number of Hippocampus zosterae caught per sample (21.3 m beach/boat seine, covering 140 m2 each area sampled). Calculations included samples with no H. zosterae captured. Sites listed clockwise around the state of Florida, with coordinates provided indicating the overall location of the sampling location: JK (not shown – zero H. zosterae collected during the time period, 30.424670, -81.413847), IR – Indian River Lagoon (28.054087, -80.574791), FB – Florida Bay (25.038184, -80.694039), CH – Charlotte Harbor (26.755285, -82.146981), TB – (27.708551, -82.576045), CK – Cedar Keys (29.143598, -82.946536), AP – Apalachicola Bay (29.647549, - 84.992495). Data source, fisheries independent monitoring program, Florida Fish and Wildlife Conservation commission, years 1996-2014, except for FB (2006-2009 only).

Figure 3: Hippocampus zosterae density (/m2) in Tampa Bay (center of sampling location 27.875165, -82.539946) between 2005 and 2013, sampled across types and season. Linear model fit with Density = 0.085114 - 3.462e-12*Sampling Date, r2 =0. Data from Masonjones et al., in prep. Figure 4: Distribution map of Hippocampus zosterae in the state of Florida, based on fisheries independent monitoring data collected from 1996-2014. Data from FIM program, Florida Fish and Wildlife commission (FWC). Sites with H. zosterae listed clockwise around the peninsula of Florida: IR – Indian River Lagoon (28.054087, - 80.574791), FB – Florida Bay (25.038184, -80.694039), CH – Charlotte Harbor (26.755285, -82.146981), TB – Tampa Bay (27.708551, -82.576045), CK – Cedar Keys (29.143598, -82.946536), AP – Apalachicola Bay (29.647549, -84.992495). Analysis and figure produced by B. Froeschke.

Figure 5: Boosted regression results investigating all Hippocampus zosterae data available through the fisheries independent monitoring program (FIM) for the state of Florida investigated across 18 years (1996-2014) for salinity, water temperature, dissolved oxygen (DO), pH, and depth sampled. Presence/absence of Hippocampus zosterae modeled, with % of variation explained for presence indicated below each RUG plot. Analysis and plot produced by B. Froeschke.

Figure 6: Number of Hippocampus zosterae caught per sample (21.3 m beach/boat seine, covering 140 m2 each area sampled) over most recent 10-year span. All six sites included (see Figure 2 for site locations).

Figure 7: Number of Hippocampus zosterae caught per sample (21.3 m beach/boat seine, covering 140 m² area sampled) over most recent 10-year span, FWC-FWRI (2017). Five sites included (AP,CK,TB,CH,IR; FB excluded because only 4 years of data; see Figure 2 for site locations).

Figure 8: Boosted regression results investigating all data available for Indian River Lagoon through the fisheries independent monitoring program (FIM) for the state of Florida investigated across 18 years (1996-2014) for salinity, water temperature, dissolved oxygen (DO), pH, and depth sampled. Presence/absence of Hippocampus zosterae modeled, with % of variation explained for presence indicated below each RUG plot. Analysis and plot produced by B. Froeschke.

Figure 9: Number of Hippocampus zosterae caught per sample (21.3 m beach/boat seine, covering 140 m² area sampled, FWC-FWRI (2017). over most recent 10-year span for Indian River Lagoon.

Table 1. Mean (Standard Error) number of Hippocampus zosterae captured per sampling event, with annual number of samples for each location and number of fish caught indicated. Data source fisheries independent monitoring program (FIM) Florida Fish and Wildlife Commission (FWC).

Year Parameter AP CH CK FB IR TB

1996 Mean(SE) .013(.013) .196(.039) .034(.019) .018(.01) .068(.013) N (n Fish) 160(2) 312(61) 88(3) 171(3) 588(40) 1997 Mean(SE) .051(.036) .087(.019) .01(.007) 0 .054(.014) N (n Fish) 39(2) 449(39) 207(2) 184(0) 723(39) 1998 Mean(SE) .014(.014) .039(.009) .008(.006) .011(.006) .024(.008) N (n Fish) 74(1) 541(21) 242(2) 358(4) 656(16) 1999 Mean(SE) 0 .068(.018) .017(.008) .021(.008) .034(.01) N (n Fish) 92(0) 474(32) 241(4) 376(8) 678(23) 2000 Mean(SE) 0 .103(.027) 0 .116(.033) .067(.015) N (n Fish) 124(0) 379(39) 242(0) 378(44) 848(57) 2001 Mean(SE) 0 .214(.055) 0 .069(.018) .031(.008) N (n Fish) 388(0) 398(85) 388(0) 391(27) 1132(35) 2002 Mean(SE) .008(.008) .222(.053) .005(.005) .049(.013) .019(.006) N (n Fish) 365(3) 379(84) 394(2) 390(19) 1130(22) 2003 Mean(SE) .003(.003) .074(.015) 0 .026(.008) .036(.007) N (n Fish) 369(1) 612(45) 411(0) 388(10) 1352(49) 2004 Mean(SE) 0 .049(.008) 0 .037(.012) .051(.012) N (n Fish) 375(0) 1108(54) 409(0) 435(16) 1303(66) 2005 Mean(SE) 0 .063(.011) 0 .032(.01) .016(.005) N (n Fish) 389(0) 975(61) 403(0) 380(12) 1249(20) 2006 Mean(SE) 0 .127(.019) 0 .51(.075) .029(.012) .025(.01) N (n Fish) 423(0) 889(113) 407(0) 210(107) 380(11) 1169(29) 2007 Mean(SE) 0 .057(.011) 0 .649(.08) .046(.01) .016(.005) N (n Fish) 463(0) 929(53) 410(0) 259(168) 570(26) 1168(19) 2008 Mean(SE) 0 .063(.02) 0 .351(.036) .044(.009) .016(.004) N (n Fish) 418(0) 718(45) 391(0) 262(92) 607(27) 1124(18) 2009 Mean(SE) .003(.003) .051(.011) 0 1.048(.079) .086(.016) .078(.017) N (n Fish) 312(1) 470(24) 249(0) 105(110) 371(32) 370(29) 2010 Mean(SE) .003(.003) .038(.009) 0 .021(.007) .023(.009) N (n Fish) 390(1) 575(22) 402(0) 377(8) 1201(28) 2011 Mean(SE) .005(.005) .048(.01) .017(.008) 0 .021(.004) N (n Fish) 390(2) 517(25) 409(7) 379(0) 1250(26) 2012 Mean(SE) 0 .077(.014) .002(.002) 0 .03(.006) N (n Fish) 389(0) 492(38) 405(1) 348(0) 1150(35) 2013 Mean(SE) .003(.003) .074(.014) .002(.002) .008(.004) .028(.006) N (n Fish) 389(1) 498(37) 406(1) 511(4) 975(27) 2014 Mean(SE) 0 .058(.012) 0 .011(.004) .056(.009) N (n Fish) 297(0) 671(39) 399(0) 729(8) 1038(58)