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Spiny Lobster Survey Results 2015

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Spiny Lobster Survey Results 2015 Results of the Surveys of 2015 in PR, by the Seamap Program, of Juvenile Caribbean Spiny Lobster (Panulirus argus) Edited and Presented by Ricardo López Prepared by Aida Rosario and Verónica Seda Puerto RiCo Department of Natural & Environmental ResourCes Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Purpose ColleCt data of planktoniC to seHling postlarval puerulus and shelter-restriCted Juvenile stages Phyllosomes are transparent and morphologiCally adapted for long planktoniC existenCe being transported on oCeaniC Currents for 6-12 months before metamorphosis to the postlarval puerulus stage PiCtures adapted from: hHp://www.virtualCoralreefdive.Com/FILES/RECRUITMENT/surv.php and hHp://www.lobsters.org/tlCbio/biology7.html Overview of the Pueruli stage • Pueruli usually persist for several weeks, as nonfeeding and oCeaniC before returning to Coastal waters, swimming at night, and tending to remain within a few CenXmeters of the water surface. Pueruli enter estuarine habitats and upon enCountering suitable inshore substrates, pueruli seHle to the benthos, typiCally in vegetated areas of algal beds, mangrove, seagrasses, small holes, and sand-mud boHoms. Several days before the molt to the first Juvenile stage, they begin to show signs of pigmentaon, turning a red-brown Color. • hHp://www.bio.fsu.edu/herrnlab/ lifehistory_pdf.pdf • hHp://www.poseidonsCienCes.Com/lobster.html Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 ObJeCXves and methods • ColleCt data about the Juvenile stage of Spiny Lobsters seHled in Casitas – (DeC. 2014 to DeC. 2015) • ColleCt data about the larval stages of Spiny Lobsters seHled in larvae ColleCtors – (April 2015 to MarCh 2016) Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Data ColleCXon of Juvenile stage of spiny lobsters seHled in Casitas (DeC. 2014 to DeC. 2015) Sampled area and Casitas’ sites Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Monthly deteCXon of Juvenile spiny lobsters per sites Months with the highest deteCXons 60 50 40 30 Number juveniles 20 10 0 Dec 14 Jan Feb Mar April May June July Aug Sept OCt Nov Dec 15 Months El Combate Bramadero El Negro El Ron FanduCa Pnt Aguila Correcon: Combate in DeC 14 should not be a zero. Was not sampled unl January Northern sites with the highest deteCXons Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Total Juvenile Spiny lobsters deteCted in 2015 at the Casitas Combate surveys started in January with 5 Casitas 100 90 90 80 71 70 66 56 N 60 u m b 50 e r 40 31 31 28 27 30 19 17 18 16 20 13 10 0 Dec 14 Jan Feb Mar April May June July Aug Sept OCt Nov Dec 15 Months Total number of Juvenile lobsters deteCted in a (1) monthly visit to all the Casitas Highest deteCXons (N=65; 10 Casitas/site + 5 Casitas in Combate), in seagrass habitat (Mostly sand, Thalassia and Syringodium) Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Monthly deteCXon of Juvenile Spiny lobsters in the Casitas, Compared between surveyed years Pearson’s Correlaon: R = 0.89634, p = 7.90 E-5 140 123 118 120 100 2008, n = 671 95 2015, n = 483 84 80 71 68 66 Numbers 60 56 53 51 46 39 40 35 31 33 31 27 24 20 19 17 18 16 20 13 0 Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Months 2008 2015 Note: How this Compare to other studies? Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Juvenile spiny lobster Carapace size Classes/sites Most deteCted Carapace size Classes (inChes) Sizes 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2 .25 2.5 2.75 3 Total Sites Bramadero 2 14 20 33 14 13 4 4 1 1 1 107 Sites with highest El Negro 4 27 28 16 33 5 14 3 2 2 134 deteCXons El Ron 5 29 26 19 9 10 3 2 103 Fanduca 1 2 5 4 1 6 4 2 1 26 Pnt Aguila 8 23 26 20 2 1 80 El Combate 8 11 11 1 2 33 Grand Total 16 80 115 115 43 65 16 22 4 3 4 483 Note: Do they differ in depths, water turbidity, temperatures or Changes in some of these or other habitat variables? Are we interested in these kind of quesXons? Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Juvenile spiny lobster most deteCted Carapace size Classes and two predators /sites Most deteCted Carapace size Classes (inChes) Depredate Depredate Size classes 0.5 0.75 1 1.25 1.5 Total Moray Juvenile Octopus eels Sites Lobsters Bramadero 14 20 33 14 13 107 13 27 El Negro 4 27 28 16 33 134 17 26 El Ron 29 26 19 9 10 103 9 23 Fanduca 2 5 4 1 6 26 27 152 Pnt Aguila 23 26 20 2 1 80 18 4 El Combate 8 11 11 1 2 33 12 57 Grand Total 80 115 115 43 65 483 96 289 Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 Correlaon among size Classes, total number of Juvenile lobsters and two predators Depredate Most deteCted size Classes Depredate 0.5 0.75 1 1.25 1.5 Lobsters OCtopus Morays 0.5 0.208 0.172 0.75 0.287 0.016 1 0.327 0.080 1.25 0.479 0.349 1.5 0.936 0.691 Lobsters 0.388 0.104 OCtopus -0.600 -0.523 -0.487 -0.363 -0.043 -0.436 0.100 Morays -0.640 -0.895 -0.759 -0.468 -0.209 -0.724 0.729 SignifiCant negave Correlaon between the numbers of moray eels and Juvenile lobsters of ~ .75 inChes Nearly signifiCant negave Correlaon between the numbers of moray eels and Juvenile lobsters of ~ 1 inChes Nearly signifiCant negave Correlaon between the numbers of moray eels and total Juvenile lobsters Nearly signifiCant posiXve Correlaon between the numbers of moray eels and oCtopus of ~ 1 inChes Note: How important is the oCtopus fishery in PR and USVI? Do you know that, Contrary to many other marine speCies, Cephalopods are inCreasing in number worldwide? ( hHp://www.sCienCemag.org/news/2016/05/world-oCtopus-and-squid-populaons-are- booming) OCtopus deteCXon in Casitas in 2008 and 2015 Sites Months 50 25 45 40 20 35 O c 30 t O o c 15 p 25 t u o s p e 20 u s s e 15 s 10 10 5 5 0 0 Jan Feb Mar Apr May Jun Jul Aug Sep OCt Nov Dec Sites Months 2008 2015 2008 2015 MeCa of oCtopuses in both years Below average in both years Seamap-Puerto RiCo-Spiny Lobster Survey Results 2015 “Post hoC” Comparison of Juvenile spiny lobsters deteCted in Casitas per moon phases Detecons/carapace size Detecons/sites/moon phases classes/moon phases 160 140 140 Verónica believes this high 120 number, is a speCies 120 aggregaon response to bad 100 100 weather N u m 80 N 80 b u e m r b 60 e r 60 40 40 20 0 20 0 0.25 0.5 0.75 1" 1.25 1.5 1.75 2 2 .25 2.5 2.75 3 Sites Size (inches) First quarter Full moon Last quarter New moon First quarter Full moon Last quarter New moon Most deteCXons in these moon phases Almost all size Classes were Note: How this Compare to other years and other studies? deteCted in these moon phases Data ColleCXon of larval stages of spiny lobsters seHled in larvae ColleCtors (April 2015 to MarCh 2016) 2008 2015 Sampled area and larvae ColleCtors sites Monthly larvae deteCXon results Total larvae detecon Larvae stages detected 400 Highest abundanCe? 160 350 140 300 120 SeCond pick? All stages appear to 100 250 L a deCline in autumn L r a v 80 r a v 200 e a e 60 150 40 100 20 50 0 April May June July Aug. Sept. OCt. Nov. Dec. Feb. Mar. Months 0 April May June July Aug. Sept. OCt. Nov. Dec. Feb. Mar. Months Transparent Trans. Pigmented Puerulli Juveniles The least deteCted stage The most deteCted stage “Post hoC” Comparison of spiny lobsters larvae deteCted in ColleCtors per moon offshore phases and depths Higher deteCXon in deep water ColleCtors Further Deep ColleCtors (30-60 feet) Shallow ColleCtors (15-20 feet) 140 140 120 120 100 100 L L a 80 a 80 r r v v a a e 60 e 60 40 40 20 20 0 0 A1D A2D B1D B2D C1D C2D D1D D2D E1D E2D F1D F2D A1S A2S B1S B2S C1S C2S D1S D2S E1S E2S F1S F2S Collector Id Collector Id First quarter Full Moon Last quarter New moon First quarter Full Moon Last quarter New moon As with Juveniles, most deteCXons in these moon phases Most deteCXon in first quarter moon phase were in the further offshore ColleCtors Comparison of spiny lobsters larval stages deteCted in offshore ColleCtors per depths Higher deteCXon of all larval stages in Further deep water ColleCtors Deep ColleCtors (30-60 feet) Shallow ColleCtors (15-20 feet) 140 140 120 120 100 100 L 80 L 80 a a r r v v a a e 60 e 60 40 40 20 20 0 0 A1D A2D B1D B2D C1D C2D D1D D2D E1D E2D F1D F2D A1S A2S B1S B2S C1S C2S D1S D2S E1S E2S F1S F2S Collector ID Collector ID Transparent Trans. Pigmented Puerulli Juveniles Transparent Trans. Pigmented Puerulli Juveniles Highest deteCXons in further offshore ColleCtors Issues brought by Aida Rosario to be considered • Our reCords of the Casitas in 2003 does not have Coordinates.
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